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    • 专利摘要:
    the modalities of the present invention provide a method, apparatus and computer program product for controlling side link transmission. the method implemented in a first user equipment that supports a first radio access technology comprises: determining a side link transmission mode to transmit, in which the side link transmission mode is one of the first mode corresponding to the first technology radio access and a second mode corresponding to a second radio access technology; and transmitting a side link signal according to the side link transmission mode using a side link feature configured by a network node serving the first user equipment.
    公开号:BR112019017158A2
    申请号:R112019017158
    申请日:2018-01-19
    公开日:2020-04-14
    发明作者:Blasco Serrano Ricardo；Sorrentino Stefano；Li Yunxi；Zhang Zhang
    申请人:Ericsson Telefon Ab L M；
    IPC主号:
    专利说明:

    METHOD AND APPARATUS IN A USER'S EQUIPMENT AND COMPUTER-READABLE MEDIA [001] This application claims the benefit and priority of PCT patent application No. PCT / CN2017 / 074175, filed on February 20, 2017, whose total content is incorporated herein by reference as part of this application.
    TECHNICAL FIELD [002] The present invention generally relates to wireless access technology, and in particular, to a method, apparatus and computer program product for controlling side link transmission.
    BACKGROUND [003] I. V2X communication (vehicle-for-anything-you-can-imagine) [004] V2X communication includes any combination of direct communication between vehicles, pedestrians and infrastructure. V2x communication can take advantage of a network infrastructure, when available, but at least basic V2X connectivity should be possible even in the event of a lack of coverage. Providing an LTE-based V2X interface can be economically advantageous due to LTE economies of scale and can allow for greater integration between communications with the network infrastructure (vehicle for infrastructure, V2I) and V2P communications (pedestrian vehicle) and V2V communications (vehicle to vehicle), compared to the use of dedicated V2x technology.
    [005] V2x communications may contain security and non-security information and, where each of the applications and services may be associated with specific sets of requirements, for example, in terms of latency, reliability, capacity, etc.
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    2/32 [006] II. Side Link Operation [007] Side link transmissions (also known as device-to-device (D2D) or proximity service (ProSe) transmissions) through the so-called PC5 interface in the cell spectrum have been standardized in 3GPP specifications. In the 3GPP specifications, two different modes of operation have been specified for side link transmissions. In a Mode 1 operating mode, user equipment (UE) in RRC CONNECTED mode can request D2D resources and eNB can grant resources through downlink control (DCI5) information on the downlink control physical channel ( PDCCH) or through dedicated signaling messages. In another Mode2 operating mode, the UE can autonomously select resources for transmission from a grouping of available resources. The resources are provided by eNB in broadcast via SIB signaling message (System Information Block) for transmissions in carriers other than the primary cell (PCell) or through dedicated signaling messages for transmission in PCell. Therefore, unlike the Mode-1 operating mode, the Mode-2 operating mode can be performed by the UE in RRC IDLE mode.
    [008] The use of side link transmission is extended to V2X communication. The design of the side link physical layer in the 3GPP specifications was dictated under the assumptions of a small amount of UE competing for the same physical resources in the spectrum to carry voice packets for mission-critical push to talk (MCPTT) traffic and low mobility. On the other hand, in V2x communication, the side link transmission must be able to handle a higher load scenario (for example, hundreds of cars could compete with physical resources) to carry V2x messages triggered by time / event (for example , cooperative awareness message (CAM), message from
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    3/32 decentralized environmental reporting (DENM)) and high mobility. For these reasons, it is necessary to improve the physical layer of the side link. In particular, two new modes of operation were introduced: mode 3 which includes scheduling of semi-persistent side link (SL SPS) and dynamic side link granting to 1st mode 1, and mode 4 corresponding to the selection of autonomous resource from UE to 1st mode 2 with some improvements. Such improvements include a procedure called detection in which the UE is required to detect the channel for at least a certain time frame before selecting the appropriate resources.
    [009] III. Side link control (SCI) 1 information format [0010] The SCI 1 format is used for scheduling PSSCH (side link shared physical channel) on the LTE network. The following information is transmitted using the SCI 1 format:
    - Priority,
    - Resource reservation,
    - Location of initial transmission and retransmission frequency resources,
    - Time interval between initial transmission and retransmission,
    - Modulation and coding scheme,
    - retransmission index, and
    - Reserved information bits, currently set to zero.
    [0011] IV. MAC header for LTE side link shared channel (SL-SCH) [0012] The MAC header for the LTE side link SL-SCH is of variable size and consists of the following fields:
    - V: MAC PDU format version number field indicating which version of the SL-SCH subheader is used,
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    4/32
    - SRC: source layer 2 ID field containing a source identity, which is defined as ProSe UE ID obtained from an upper layer,
    - DST: Destination Layer 2 ID for V2X side link transmission, which is defined as an identifier provided by an upper layer.
    - LCID: logical channel ID field uniquely identifying a logical channel instance, and there is an LCID field for each MAC PDU or pad included in the MAC PDU,
    - L: length field indicating the length of the corresponding MAC PDU in bytes,
    - F: format field indicating the size of the Length field,
    - E: extension field which is a flag indicating whether there are more fields in the MAC header or not,
    - R: reserved bit, currently set to 0.
    [0013] V. User plan PDCP (packet data convergence protocol) Data PDU for LTE side link radio carrier (SLRB) [0014] Fig. 1 shows the format of the PDCP Data PDU for SLRB used for one-to-many communication. The SDU type, that is, the Layer 3 Protocol Data Unit type, contains the following fields, as shown in Table 1. The SDU type includes 1 reserved bit.
    Table 1
    Bit description 000 IP 001 ARP 010 PC5 signaling 011 Non-IP 100-111 Reserved
    [0015] VI. New radio access technology (NR)
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    5/32 [0016] NR access technology aims to address a wide range of use cases including enhanced mobile broadband, massive MTC (machine type communication), critical MTC, and additional requirements. The numerology and frame structure for NR interfaces in the NR network can be totally different from the LTE network.
    [0017] In NR access technology, more than one subcarrier spacing value can be supported. Multiple lengths of CP (cyclic prefix) can be defined for a given subcarrier spacing. The access technology via NR defines the number of subcarriers per PRB (physical resource block) and a subframe duration is defined by the duration of x OFDM symbols, given a reference numerology.
    [0018] The current side link transmission is based on LTE. The LTE-based side link transmission has the same structure as LTE radio frames.
    [0019] With NR technology being standardized, it can be expected that the NR-based side link transmission, which has the same radio frame structure with NR, for example with different subcarrier spacing with LTE (for example, 3, 75 kHz) will be standardized. This NR-based side link transmission can achieve better performance than LTE-based side link transmission, for example, better resource utilization, lower latency, etc. In addition, the radio protocols, for example, MAC layer and PDCP for NR-based side link transmission may also be different from that used for LTE-based side link transmission. Therefore, a legacy UE LTE may not be able to receive side link transmission using NR.
    [0020] It can be expected that the LTE system and the NR system will coexist for a very long time after the NR system starts implantation, both
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    6/32 for Uu as for the side link. Legacy LTE eNBs can implement only support to control LTE-based side link transmission. For reasons of cost and complexity, it may not be possible / desirable to update legacy eNB LTE to equip them with NR features.
    [0021] As a result, when a UE capable of NR (ie the UE supporting access technology via NR) camped / connected to a legacy LTE eNB intends to perform side link operation, or when a UE capable of NR has in mind NR-based LTE course moves on the LTE network (via cell reselection or handover), based on the current solution, the NR capable UE must give up the side link operation or retreat to the LTE side link operation. If the NR capable UE can return to the LTE side link operation, the NR capable UE will perform the LTE based side link transmission instead of the NR based side link transmission, which will lead to lower performance compared to the NR-based side link transmission. In addition, it can lead to a communication failure with the UE that supports NR-based side link transmission but does not support LTE-based side link transmission. If the UE capable of NR cannot return to the LTE side link operation, which is possible, since NR technology may not provide backward compatibility with LTE, the UE capable of NR must give up the side link operation, which leads to service interruption.
    [0022] On the other hand, the UE capable of NR camped / connected to an ENB of NR can always be asked to transmit side link using NR-based technology, which can make its communication failure with the legacy LTE UE that only supports LTE-based side link transmission.
    SUMMARY [0023] It is therefore an objective of modalities of the present invention
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    7/32 provide a transmission control mechanism that allows the UE to implement side link transmission through different radio access technologies (RAT).
    [0024] In accordance with a first aspect of the invention, there is provided a method implemented in a first UE that supports a first radio access technology. In the method, a side link transmission mode is determined to transmit, where the side link transmission mode is one of a first mode corresponding to the first radio access technology and a second mode corresponding to a second access technology radio. Then, a side link signal is transmitted according to the side link transmission mode using a side link feature configured by a network node serving the first UE. In some modalities, the first radio access technology is compatible with the second radio access technology.
    [0025] In some modalities, in determining a side link transmission mode, first a side link signal from other side link transmissions is detected. It is then determined which side link transmission mode is used for the other side link transmissions. In response to any of the other side link transmissions using the second mode, the side link transmission mode is determined as the second mode. In response to all other side link transmissions using the first mode, the side link transmission mode is determined to be the first mode.
    [0026] In some modalities, in determining a side link transmission mode, it is first determined that the radio access technology is supported by at least one second UE in the vicinity. In response to any of the at least one second EU that supports the
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    8/32 second radio access technology, the side link transmission mode is determined as the second mode. In response to all at least one second UE that supports the first radio access technology, the side link transmission mode is determined as the first mode.
    [0027] In some modalities, the determination of the radio access technology supported by at least one second UE is based on the capacity information of at least one second UE that was obtained by the first UE.
    [0028] In some modalities, the first UE stores the capacity information associated with the identification of at least one second UE.
    [0029] In some modalities, the capacity information is obtained from a side link signal transmitted previously by at least one second UE.
    [0030] In some modalities, capacity information is received in a signaling message transmitted from the network node that supports the first radio access technology.
    [0031] In some embodiments, the side link transmission mode is determined based on the preconfiguration of the first mode or the second mode for the first UE.
    [0032] In some embodiments, the side link transmission mode is determined based on a transmission requirement for the side link transmission.
    [0033] In some modalities, the side link transmission mode is determined based on a resource configuration dedicated to the first mode or the second mode for the first UE.
    [0034] In some modalities, the network node supports the second radio access technology. In response to determining the side link transmission mode as the first mode, the first UE adapts the
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    9/32 configuration of the side link feature for the first mode and transmits a side link signal using the side link feature adapted according to the first mode. In response to determining the side link transmission mode as the second mode, the first UE transmits the side link signal using the side link feature according to the second mode.
    [0035] In some embodiments, the first UE is configured with a first side link feature for the first mode and a second side link feature for the second mode. In response to determining the side link transmission mode as the first mode, the first UE transmits the side link signal using the first side link feature according to the first mode. In response to determining the side link transmission mode as the second mode, the first UE transmits the side link signal using the second side link feature according to the second mode.
    [0036] In some embodiments, the first UE is configured with a side link feature within which a part of the parameters is assigned with a first value for the first mode and a second value for the second mode and other parameters are assigned with a common value to the first and second modes. In response to determining the side link transmission mode as the first mode, the first UE transmits the side link signal within the side link resource using the corresponding parameters for the first mode according to the first mode. In response to determining the side link transmission mode as the second mode, the first UE transmits the side link signal within the side link resource using the corresponding parameters for the second mode according to the second mode.
    [0037] In some modalities, the first EU still transmits signals
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    Additional 10/32 to cover the side link feature.
    [0038] In some modalities, the first UE determines which side link transmission mode should be used for reception. Then the first UE receives a side link signal using the given side link transmission mode.
    [0039] In some embodiments, the first UE receives a second side link signal, and decodes the second received side link signal using the first mode and the second mode respectively. In response to the second received side link signal being successfully decoded using the first mode, the first UE determines that the first mode should be used for reception. In response to the second incoming side link signal being successfully decoded using the second mode, the first UE determines that the second mode should be used for reception.
    [0040] In some embodiments, the first UE is configured with a receive feature, a first transmit feature for the first mode and a second transmit feature for the second mode, the receive feature that covers the first and second features transmission. The first UE detects whether a second side link signal is received using the first mode or the second mode within the first transmission resource. In response to the detection of the receipt of the second side link signal, the first UE determines that the first mode or the second mode must be used within the first transmission-to-receive resource. The first UE detects whether the second side link signal is received using the first mode or the second mode within the second transmission resource. In response to the detection of the receipt of the second side link signal, the first UE determines that the first mode or the second mode must be used within the second transmit-to-receive resource. The first
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    11/32
    UE detects whether the second side link signal is received using the first mode or the second mode within the remainder of the reception facility. In response to detecting the receipt of the second side link signal, the first UE determines that the first mode or the second mode must be used within the remainder of the receive-to-receive facility.
    [0041] In some embodiments, the first UE is configured with a first reception feature for the first mode and a second reception feature for the second mode. The first UE detects whether a second side link signal is received within the first reception resource or within the second reception source. In response to the detection that the second side link signal is received within the first reception facility, the first UE determines that the first mode should be used for reception. In response to the detection that the second side link signal is received within the first reception facility, the first UE determines that the first mode should be used for reception.
    [0042] In some modalities, the first radio access technology is the NR access technology and the second radio access technology is the LTE radio access technology, and the first mode is based on NR and the second mode is based on LTE.
    [0043] In some modalities, the first radio access technology is the LTE radio access technology and the second radio access technology is the NR access technology, and in which the first mode is based on LTE and the second mode is based on NR.
    [0044] According to a second aspect of the invention, an apparatus is provided in a user equipment that supports a first radio access technology. The apparatus comprises a processor and a memory, said memory containing instructions executable by said processor, by
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    12/32 that said apparatus is operative for: determining a side link transmission mode to transmit, the side link transmission mode being one of a first mode corresponding to the first radio access technology and a second mode corresponding to a second radio access technology; and transmitting a side link signal according to the side link transmission mode using a side link feature configured by a network node serving the user equipment. In some modalities, the first radio access technology is compatible with the second radio access technology.
    [0045] According to a third aspect of the invention, a computer-readable storage medium having a computer program stored therein is provided. The computer program is executable by a processor to cause the processor to perform the method for controlling side link transmission according to the first aspect of the invention.
    [0046] In accordance with a fourth aspect of the invention, a computer program product executable by a device is provided to cause the device to perform the method for controlling side link transmission according to the first aspect of the invention.
    [0047] According to a fifth aspect of the invention, an apparatus is provided in user equipment that supports a first radio access technology. The apparatus comprises a determination module configured to determine a side link transmission mode to transmit, wherein the side link transmission mode is one of a first mode corresponding to the first radio access technology and a second mode corresponding to a second radio access technology. The apparatus also comprises a transmission module configured to transmit a side link signal according to the link transmission mode
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    13/32 side using a side link feature configured by a network node serving the user equipment.
    [0048] According to the various aspects and modalities as mentioned above, the UE can implement side link transmission in different RATs. In particular, the UE that supports the NR access technology (also referred to as the NR UE) can perform NR-based side link transmission in the LTE system, which can achieve performance comparable to that of the NR system. The UE that supports LTE radio access technology (also referred to as LTE UE) can carry out LTE-based side link transmission in the NR system.
    BRIEF DESCRIPTION OF THE DRAWINGS [0049] Through the more detailed description of some modalities of the present invention in the attached drawings, the above and other objectives, characteristics and advantages of the present invention will become more apparent, in which the same reference is generally refers to the same components in the embodiments of the present invention.
    [0050] Fig. 1 is a diagram showing the PDCP Data PDU format for SLRB;
    [0051] Fig. 2 is a flow chart illustrating the method for controlling side link transmission according to some modalities of the present invention;
    [0052] Fig. 3 is a diagram illustrating an example in which the method for controlling side link transmission according to some modalities is implemented;
    [0053] Fig. 4 is a diagram illustrating another example in which the method for controlling side link transmission according to some modalities is implemented;
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    14/32 [0054] Fig. 5 is a flowchart illustrating the method for controlling the transmission of the side link according to some modalities of the present invention;
    [0055] Fig. 6 is a schematic block diagram of an apparatus in user equipment in accordance with some embodiments of the present invention; and [0056] Fig. 7 is a schematic block diagram of an apparatus for controlling side link transmission according to some embodiments of the present invention.
    DETAILED DESCRIPTION [0057] Some preferred embodiments will be described in more detail with reference to the accompanying drawings, in which the preferred embodiments of the present invention have been illustrated. However, the present invention can be implemented in a number of ways, and therefore should not be construed as being limited to the modalities described herein. On the contrary, these modalities are provided for the complete and complete understanding of the present invention, and completely extending the scope of the present invention to those skilled in the art.
    [0058] For illustrative purposes, various modalities of the present invention will be described in the context of a Novo Rádio (NR) system and an LTE network. Those skilled in the art will appreciate, however, that the concept and principle of the various embodiments of the present invention may be more generally applicable to other wireless networks.
    [0059] The non-limiting and exemplary modalities of the present invention refer to the control of side link transmission in different RAT.
    [0060] Fig. 2 shows a flowchart illustrating method 200 for side link transmission control according to some modalities
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    15/32 of the invention. The method can be carried out in the communication system to which two RATs (a first RAT and a second RAT) are applicable. In the communication system, some UEs can support the first RAT, and some UEs can support the second RAT. In some embodiments, the UE can be a radio terminal such as a mobile phone, a wearable device, a tablet, etc., a vehicle with radio communication functionality, or any other type of electronic device with radio communication functionality. .
    [0061] In the description below, the first RAT is backwards compatible with the second RAT, that is, the first RAT is more advanced compared to the second RAT. As an example, the first RAT is NR access technology, and the second RAT is LTE radio access technology. For the sake of clarity and simplicity, the UE that supports NR access technology is referred to as the NR of NR.
    [0062] As shown in Fig. 2, in block 210, the UE of NR determines a side link transmission mode to be used to transmit. In some embodiments, there are two side link transmission modes, that is, NR-based mode (which is an example of a first mode) and LTE-based mode (which is an example of a second mode).
    [0063] The determination of the side link transmission mode will be described in detail as follows.
    [0064] In some embodiments, the UE of NR can detect a side link signal from at least one other side link transmission using detection protocols. Generally, side link transmission can use unicast communication, multicast communication, or broadcast communication. The UE of NR can receive the side link signals destined to it and broadcast in its communication range. Then the UE of NR can determine which side link transmission mode is used for these
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    16/32 side link transmissions. If the UE of NR determines that any of these other side link transmissions use the LTE based mode, the UE of NR can determine its side link transmission mode as the LTE based mode. If the NR UE determines that most or all of these other side link transmissions use the NR based mode, the NR UE can determine its side link transmission mode as the NR based mode. This is because in the case of broadcast communication, the UE of NR needs to determine the side link transmission mode applicable to all other UEs. A person skilled in the art will appreciate that in some cases, for example, the side link transmission carries insecure information, it is sufficient for the UE of NR to determine the side link transmission modes used by most of the other side link transmission. .
    [0065] Alternatively or additionally, in some embodiments, the UE of NR can determine which radio access technology is supported by one or more UE seconds in the vicinity. The second UE can be UE with which the NR UE will carry out the side link transmission. This determination can be made according to the capacity information of the second UE. Capacity information can indicate the UE's accessibility, for example, the radio access technology used by the UE.
    [0066] In some modalities, the UE of NR can obtain the capacity information of the side link signal previously transmitted by the second UE. For example, when the second UE transmits the side link signal using LTE-based side link transmission, the second UE can indicate its ability to access the side link signal. For example, the reserved bit in LTE SCI, MAC header for LTE SL-SCH or PDCP header for LTE SLRB can be used for capacity information. The NR UE can store the capacity information associated with the identification of the second UE. For another
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    17/32 example, if the second UE transmits the side link signal using NR based side link transmission, it indicates that the second UE supports NR technology. The UE of NR can detect the Source Layer 2 EU ID / ID
    ProSe, and store the capacity information of the second UE associated with the
    ID.
    [0067] In addition, the capacity information of the second UE can be received in a common or dedicated signaling message from the ENB of NR that serves the UE of NR. This is especially useful if the service cell / UE UE housing is the NR cell or the eLTE cell while all neighboring cells are NR cells and / or eLTE cells. The UE of NR can report its capacity to its NR ENB. The NR eNBs can then exchange the capacity information of the NR EU (s) and inform the NRs served / camped out of the capacity information. In addition, if the NR ENB detects that the neighboring cell is the NR cell, the NR ENB can inform its served / camped NR UE of the capacity information of another NR UE in the neighboring NR cell.
    [0068] In the case of broadcast communication, after determining the second UE radio access technology, if any second UE supports LTE radio access technology, the NR UE determines the side link transmission mode as the LTE mode. If most or all of the second UE supports NR access technology, the NR UE determines the side link transmission mode as the NR-based mode. In the case of unicast communication and multicast communication, the UE of NR can determine its side link transmission according to the radio access technology supported by the destination UE (s).
    [0069] In some embodiments, the UE of NR can be pre-configured or predefined with the mode based on LTE or the mode based on NR. In that
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    18/32 case, the UE of NR determines its side link transmission mode as pre-configured or predefined.
    [0070] In some embodiments, the UE of NR can determine the side link transmission mode based on a transmission requirement in the side link transmission. The transmission requirement can be expressed in terms of some transmission parameters, for example QoS information such as priority level, broadcast mode (for example, unicast, multicast, broadcast), destination address, transport format, or source of synchronization, etc.
    [0071] In some embodiments, the UE of NR can determine the side link transmission mode based on a resource configuration dedicated to the NR-based mode or the LTE-based mode. If the UE of NR is granted to use the feature dedicated to the LTE-based mode or the NR-based mode, the UE of the NR can determine the corresponding side link transmission mode according to the dedicated resources.
    [0072] It should be noted that the above modalities for determining the side link transmission mode can be implemented individually or in combination.
    [0073] Returning to Fig. 2, after determining the side link transmission mode, in block 220, the UE of NR can transmit a side link signal using a side link resource configured by the network node serving the UE of NR, for example eNB, according to the determined side link transmission mode.
    [0074] In one embodiment, the side link feature is used by the UE of NR to transmit and receive side link signals. As described above, the UE of NR can obtain the side link feature in two ways. One is that the UE of NR requests the side link feature and the eNB that serves the UE of NR in
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    19/32 response grants the side link feature to the UE of NR. The other is that the eNB broadcasts a group of available resources and the UE of NR autonomously selects the direct side link resource of the group. The side link resource can be expressed by one or more resource groupings in time and / or frequency and associated transmission parameters, for example maximum transmission power, modulation and coding scheme (MCS), retransmission number, etc.
    [0075] Next, the detailed description of the UE of NR transmitting the side link signal will be provided with reference to Fig. 3. In the example shown in Fig. 3, the UE of NR can be served by the eNB of LTE or ENB of NR .
    [0076] In the case of the LTE eNB, the LTE eNB grants / configures the side link feature for the LTE-based mode only for the UE of NR.
    [0077] If it is determined that the NR UE uses the NR-based mode to transmit, the NR UE can transmit the side link signal within the side link resource but not using LTE parameters (for example, numerology). First, the UE of NR can adapt the configuration of the side link resource for the side link transmission based on NR. In some embodiments, the UE of NR can choose transmission parameters for the side link transmission based on NR within the limits of the transmission parameters for the side link transmission based on LTE, for example, the maximum transmission power. For example, the NR ENB grants 1 PRB to the NR UE. For side link transmission based on LTE, 1 PRB corresponds to 12 * 15 kHZ (ie 180 kHz) subcarriers and 14 OFDM symbols (lms). Therefore, the UE of NR can adapt 1 PRB to correspond to 6 * 30 kHZ subcarriers and 28 OFDM symbols for the NR-based side link transmission. Then the UE UE can transmit the side link signal using the adapted side link feature.
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    20/32 [0078] If it is determined that the NR UE uses the LTE-based mode to transmit, the NR UE can transmit the side link signal using the side link feature directly in accordance with the LTE based mode.
    [0079] In the case of the NR ENB serving the UE of NR, in some modalities, the ENB NR can configure / grant the side link feature for the NR based mode (hereinafter referred to as the NR feature) and / or the side link feature for LTE-based mode (hereinafter referred to as LTE feature). The NR feature may or may not override the LTE feature. Alternatively, the NR resource can be identical to the LTE resource. In some other modalities, the NR ENB can configure / grant the side link feature in which some parameters are assigned a dedicated NR value and a dedicated LTE value and other parameters are assigned a common value. The assignment can be grouping specific. For example, the NR ENB can configure different MCS for LTE-based and NR-based side link transmissions for a specific cluster, while configuring the maximum transmission power common to both.
    [0080] It should be noted that the NR ENB grants the NR resource and the dedicated NR parameters only to the NR UE. The NR ENB may know that it is serving the NR UE through an RRC UECapabilitylnformation message from the NR UE indicating its ability to access via NR.
    [0081] In the case where the NR ENB configures / grants only the NR resource, if it is determined that the NR UE uses the NR-based mode, the NR UE can transmit the side link signal using the NR resource NR. If it is determined that the NR UE uses the LTE-based mode, the NR UE can adapt the configuration of the NR resource to the LTE-based mode. For example, the NR ENB can grant 1 PRB to the NR UE. The UE of NR can adapt 1 PRB to the LTE-based mode. Then the UE of NR can transmit
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    21/32 using the adapted feature.
    [0082] In the case where the NR ENB configures / grants only the LTE resource, if it is determined that the NR UE uses the NR-based mode, the NR UE can adapt the configuration of the LTE resource to the LTE resource. based on NR. Then the UE of NR can transmit the side link signal using the adapted resource. If it is determined that the NR UE uses the LTE-based mode, the NR UE can transmit using the LTE resource.
    [0083] In the case where the NR ENB configures / grants the LTE resource and the NR resource, if it is determined that the NR UE uses the NR-based mode, the NR UE can transmit the side link signal using the NR feature. If it is determined that the NR UE uses the LTE-based mode, the NR UE can transmit using the LTE resource.
    [0084] Although the first RAT is NR access technology and the second RAT is LTE radio access technology in the above modalities, it will be appreciated that the first RAT may be LTE radio access technology and the second RAT is the access technology via NR in some modalities. Next, the description of the LTE UE transmitting the side link signal will be provided with reference to Fig. 4. In the example of Fig. 4, the LTE UE can be served by the NR ENB or the LTE eNB. In the case of the NR ENB, the NR ENB can configure / grant the NR resource and / or the LTE resource to the LTE UE.
    [0085] Since the LTE UE uses only the LTE-based mode, the side link transmission mode of the LTE UE is determined as the LTE-based mode. In the event that the NR ENB configures / grants only the NR resource, the LTE UE can adapt the NR resource configuration to the LTE-based mode. Then the LTE UE can transmit the side link signal using the adapted resource. In the case where the NR ENB configures / grants the LTE resource, the LTE UE can transmit the
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    22/32 side link using the LTE feature.
    [0086] In the case of the LTE eNB serving the LTE UE, the LTE eNB configures / grants the side link feature for the LTE-based mode only to the LTE UE. Therefore, the LTE UE can transmit the side link signal directly using the side link feature.
    [0087] In addition, the UE of NR can use a part of the side link feature to transmit the side link signal. Thus, the side link feature is not measured. In this case, the UE of NR can still transmit additional signals to fully encompass the side link feature, so that the entire side link feature can be used. The additional signal can be a noise signal, a fill signal, or any other signal.
    [0088] Fig. 5 shows a flow chart illustrating method 500 for side link transmission control according to some modalities of the invention, in particular, the method shown in Fig. 5 refers to a reception process for transmission side link. The method can be performed by the UE that supports a first RAT.
    [0089] In some modalities, the first RAT is more advanced than the second RAT. In the following description, as an example, the first RAT is NR access technology, and the second RAT is LTE radio access technology.
    [0090] As shown in Fig. 5, in block 510, the UE of NR can determine which side link transmission mode is to be used for reception. As described above, the side link transmission mode can be one of the NR-based modes and the LTE-based mode.
    [0091] In one embodiment, the determination can be carried out by performing blind detection. Specifically, the UE of NR receives a side link signal. Then the UE of NR decodes the received side link signal
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    23/32 using NR-based mode and LTE-based mode respectively. It can include demodulation checking, purging, decoding, unscrambling, and CRC (cyclic redundancy checking). If the CRC check corresponding to NR is successful, it indicates that the received side link signal is successfully decoded using the NR-based mode. Therefore, it is determined that the NR-based mode should be used for reception. If the CRC check corresponding to LTE is successful, it indicates that the incoming side link signal is successfully decoded using the LTE-based mode. Therefore, it is determined that the LTE-based mode should be used for reception.
    [0092] In another embodiment, the UE of NR can be configured with a receive feature, an NR transmit feature for NR-based mode and an LTE transmit feature for LTE-based mode. The receive feature, the NR transmit feature and the LTE transmit feature are the side link feature. The receive feature can cover both NR and LTE transmission features. In this case, the UE of NR can detect the receipt of the side link signal within the NR transmission resource, the LTE transmission resource and the rest of the reception resource respectively using the NR-based mode and the LTE-based mode. Then the UE of NR can determine the NR-based mode or the LTE-based mode should be used for reception within the respective resources according to the result of the detection.
    [0093] Specifically, if the NR UE detects that the side link signal is received within the NR transmission resource using the NR based mode, the NR UE can determine that the NR based mode should be used for reception within of the NR transmission resource. If the UE of NR detects that the side link signal is received within the NR transmission resource
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    24/32 using the LTE-based mode, the UE of NR can determine that the LTE-based mode is used for reception within the transmission resource
    NR.
    [0094] If the UE of NR detects that the side link signal is received within the LTE transmission resource using the NR-based mode, the UE of NR can determine that the NR-based mode should be used for reception within the resource LTE transmission. If the UE of NR detects that the side link signal is received within the LTE transmission resource using the LTE-based mode, the UE of NR can determine that the LTE-based mode is used for reception within the LTE transmission.
    [0095] If the UE of the NR detects that the side link signal is received within the remainder of the reception facility using the NR-based mode, the UE of the NR may determine that the NR-based mode should be used for reception within the rest of the receive feature. If the UE of NR detects that the side link signal is received within the remainder of the receive resource using the LTE-based mode, the UE of NR can determine that the LTE-based mode is used for reception within the remainder of the reception.
    [0096] In yet another embodiment, the UE of NR is configured with an NR reception feature for NR-based mode and an LTE reception feature for LTE-based mode. The NR reception feature and the LTE reception feature constitute the side link feature. In this case, the NR UE can detect whether the side link signal is received within the NR reception facility or within the LTE reception facility. If the NR UE detects that the side link signal is received within the NR reception facility, the NR UE can determine that the NR based mode is used for reception. If the UE of NR detects that the side link signal is received
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    25/32 within the LTE reception feature, the UE of NR can determine that the LTE-based mode should be used for reception.
    [0097] Then in block 520, the UE of NR can receive the subsequent side link signals using the determined side link transmission mode.
    [0098] In some other modalities, the first RAT may be the LTE radio access technology, and the second RAT may be the NR access technology.
    [0099] In addition, one skilled in the art will appreciate that the method as shown in Fig. 5 can be combined with the method as shown in Fig. 2.
    [00100] It can be seen from the description above that the method for controlling side link transmission according to the above modalities can implement side link transmission in different RAT. In particular, the method allows the UE of NR to perform the NR-based mode in the LTE system. In addition, the method allows the UE of NR to determine the appropriate side link transmission mode, so that the UE of NR can communicate with both the UE of LTE and the UE of NR. In addition, the method also allows the UE LTE to communicate with both the LTE UE and the NR UE.
    [00101] Although NR access technology and LTE radio access technology are employed in the above modalities, a person skilled in the art will appreciate that any other radio access technology may be applicable. It is conceivable that the method for controlling side link transmission in accordance with these modalities can be applied to two arbitrary radio access technologies.
    [00102] Fig. 6 is a schematic block diagram of a 600 device
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    26/32 in user equipment (UE) according to some embodiments of the present invention. The user equipment can be a mobile phone, a wearable device, a tablet, a vehicle with radio communication functionality, or any other electronic device with radio communication functionality. In some embodiments, the user equipment supports the first RAT. As shown in Fig. 6, the apparatus 600 may comprise a processor 601 and a memory 602. The memory 602 may contain instructions executable by the processor 601. The apparatus 600 is operative to determine a side link transmission mode to transmit, the mode side link transmission method, one of which is first corresponding to the first radio access technology and a second mode corresponding to a second radio access technology, and for transmitting a secondary signal to at least a second UE in the vicinity in accordance with the side link transmission mode using a side link feature over a network node serving the UE.
    [00103] In some modalities, the first RAT is more advanced compared to the second RAT. As an example, the first RAT may be the NR access technology, and the second RAT may be the LTE radio access technology. In addition, the first RAT may be the LTE radio access technology and the second RAT may be the NR access technology.
    [00104] The 601 processor may be of any type suitable for the local technical environment, and may comprise one or more general purpose computers, computers for special purposes, microprocessors, digital signal processors (DSP) and processors based on multi-core processor architectures , as non-limiting examples. Memory 602 can be of any type suitable for the local technical environment and can be implemented using any suitable data storage technology, such as
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    27/32 semiconductor-based memory devices, flash memory, magnetic memory devices and systems, optical memory systems and devices, fixed memory and removable memory.
    [00105] In some embodiments, the apparatus 600 may still be operative to detect a side link signal from other side link transmissions, to determine which side link transmission mode is used for the other side link transmissions, to determine, in response that any of the other side link transmissions uses the second mode, the side link transmission mode as the second mode, and to determine, in response that all other side link transmissions use the first mode, the side link transmission as the first mode. This is because in the case of broadcast communication, the UE of NR needs to determine the side link transmission mode applicable to all other UEs. A person skilled in the art will appreciate that in some cases, for example, the side link transmission carries insecure information, it is sufficient for the UE of NR to determine the side link transmission modes used by most of the other side link transmission. .
    [00106] In some embodiments, the apparatus 600 may still be operative to determine which radio access technology is supported by at least one second UE in proximity, to determine, in response that any one of at least one second UE supports the second radio access technology, the side link transmission mode as the second mode, and to determine, in response that all at least one second UE supports the first radio access technology, the side link transmission mode as the first way. This is because in the case of broadcast communication, user equipment 600 needs to determine the side link transmission mode applicable to all other UEs. In the case of unicast and
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    28/32 of multicast communication, user equipment 600 can determine its side link transmission according to the radio access technology supported by the destination EU (s).
    [00107] In some modalities, the network node can support the second radio access technology. The apparatus 600 is further operative for, in response to determining the side link transmission mode as the first mode, adapting the configuration of the side link resource to the first mode and transmitting a side link signal using the adapted side link resource according to the first mode, and in response to determining the side link transmission mode as the second mode, to transmit the side link signal using the side link feature according to the second mode.
    [00108] In some modalities, the user equipment can be configured with a first side link feature for the first mode and a second side link feature for the second mode. Apparatus 600 may be operative to transmit, in response to determining the side link transmission mode as the first mode, the side link signal using the first side link feature according to the first mode, and to transmit, in response determining the side link transmission mode as the second mode, the side link signal using the second side link feature according to the second mode.
    [00109] In some modalities, the user equipment can be configured with a side link feature within which a part of the parameters is assigned with a first value for the first mode and a second value for the second mode and other parameters are assigned with a common value for the first and second modes. Apparatus 600 may also be operative to transmit, in response to determining the mode of transmission
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    29/32 side link as the first mode, the side link signal within the side link resource using the corresponding parameters for the first mode according to the first mode, and to transmit, in response to determining the transmission mode of side link as the second mode, the side link signal within the side link resource using the corresponding parameters for the second mode according to the second mode.
    [00110] In some embodiments, the apparatus 600 may still be operative to determine which side link transmission mode is to be used to receive a side link signal, and to receive the side link signal using the link transmission mode determined side.
    [00111] Fig. 7 is a schematic block diagram of an apparatus 700 for side link transmission control according to some embodiments of the present invention. The device 700 can be incorporated in / as UE which supports the first RAT. As shown in Fig. 7, the apparatus 700 may comprise a determination module 701 configured to determine a side link transmission mode to transmit, wherein the side link transmission mode is one of the first mode corresponding to the first transmission technology. radio access and a second mode a second radio access technology. The apparatus 700 also comprises a transmission module 702 configured to transmit a side link signal according to the side link transmission mode, using a side link feature configured by a network node serving the UE.
    [00112] It should be noted that Fig. 7 illustrates only several functional modules in the device 700, and one skilled in the art can implement these functional modules in practice using any suitable software and hardware. Thus, the
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    30/32 modalities described here are not generally limited to the shown structure of the device 700 and functional modules.
    [00113] In some embodiments of the present invention, a computer-readable storage medium having a computer program stored therein is also provided. The computer program is executable by a processor to make the processor perform the above methods for controlling side link transmission.
    [00114] In some embodiments of the present invention, a computer program product executable by a device is also provided to cause the device to perform methods for controlling side link transmission according to some embodiments of the present invention.
    [00115] In general, the various exemplary modalities can be implemented in hardware or circuits for special purposes, software, logic or any combination thereof. For example, some aspects can be implemented in hardware, while other aspects can be implemented in firmware or software that can be executed by a controller, microprocessor or other computing device, although the invention is not limited to them. Although various aspects of the exemplary modalities of this invention can be illustrated and described as block diagrams, flowcharts, or using some other pictorial representation, it is well understood that these blocks, devices, systems, techniques or methods described herein can be implemented in, as examples non-limiting, special hardware, software, firmware, circuits or logic, general-purpose hardware or controller or other computing devices, or any combination thereof.
    [00116] As such, it should be appreciated that at least some aspects of the exemplary modalities of the invention can be practiced in several
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    31/32 components such as chips and integrated circuit modules. It should be understood that the exemplary embodiments of this invention can be performed on an apparatus that is incorporated as an integrated circuit, in which the integrated circuit may comprise circuits (as well as, possibly, firmware) to incorporate at least one or more of a data processor , a digital signal processor, baseband circuits and radio frequency circuits that are configurable in order to operate according to the exemplary modalities of this invention.
    [00117] It should be appreciated that at least some aspects of the exemplary modalities of the invention can be incorporated into instructions executable by computer, as in one or more program modules, executed by one or more computers or other devices. Generally, program modules comprise routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types when executed by a processor on a computer or other device. Computer-executable instructions can be stored on a computer-readable medium such as a hard disk, optical disk, removable storage media, solid-state memory, RAM, etc. As will be appreciated by those skilled in the art, the functionality of the program modules can be combined or distributed as desired in various modalities. In addition, the functionality can be incorporated in whole or in part into firmware or hardware equivalents such as integrated circuits, field programmable port arrangement (FPGA), and the like.
    [00118] The present invention comprises any new feature or combination of features described here either explicitly or any generalization thereof. Various modifications and adaptations to the modalities
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    Previous copies of this invention may become apparent to those skilled in the art relevant to the foregoing description, when read in conjunction with the accompanying drawings. However, any and all modifications will still be within the scope of the non-limiting and exemplary modalities of this invention.
    权利要求:
    Claims (33)
    [1]
    1. Method (200) implemented in a first user equipment (UE) that supports a first radio access technology characterized by the fact that it comprises:
    determining (210) a side link transmission mode for transmitting, the side link transmission mode being one of a first mode corresponding to the first radio access technology and a second mode corresponding to a second radio access technology; and transmitting (220) a side link signal according to the side link transmission mode using a side link facility configured by a network node serving the first UE.
    [2]
    2. Method according to claim 1, characterized by the fact that determining a side link transmission mode comprises:
    detecting a side link signal from other side link transmissions;
    determine which side link transmission mode is used for the other side link transmissions;
    in response to any of the other side link transmissions using the second mode, determine the side link transmission mode as the second mode; and in response to all other side link transmissions using the first mode, determining the side link transmission mode as the first mode.
    [3]
    3. Method, according to claim 1, characterized by the fact that determining a side link transmission mode comprises:
    determine which radio access technology is supported by at least one second UE in the vicinity;
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    2/12 in response to any of the at least one second UE that supports the second radio access technology, determining the side link transmission mode as the second mode; and in response to all at least one second UE that support the first radio access technology, determine the side link transmission mode as the first mode.
    [4]
    4. Method according to claim 3, characterized by the fact that the determination of the radio access technology supported by at least one second UE is based on the capacity information of the at least one second UE that was obtained by the first UE.
    [5]
    5. Method according to claim 1, characterized by the fact that the side link transmission mode is determined based on the preconfiguration of the first mode or the second mode for the first UE.
    [6]
    6. Method according to claim 1, characterized by the fact that the side link transmission mode is determined based on a transmission requirement for the side link transmission.
    [7]
    7. Method, according to claim 1, characterized by the fact that the side link transmission mode is determined based on a resource configuration dedicated to the first mode or the second mode for the first UE.
    [8]
    8. Method, according to claim 1, characterized by the fact that the network node supports the second radio access technology;
    and where transmitting a side link signal comprises:
    in response to determining the side link transmission mode as the first mode, adapt the configuration of the side link feature to the first mode; and transmit a side link signal using the side link feature
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    3/12 adapted according to the first mode; and in response to determining the side link transmission mode as the second mode, transmitting the side link signal using the side link feature according to the second mode.
    [9]
    9. Method according to claim 1, characterized by the fact that the first UE is configured with a first side link feature for the first mode and a second side link feature for the second mode;
    where transmitting a side link signal comprises:
    in response to determining the side link transmission mode as the first mode, transmitting the side link signal using the first side link feature according to the first mode; and in response to determining the side link transmission mode as the second mode, transmitting the side link signal using the second side link feature according to the second mode.
    [10]
    10. Method according to claim 1, characterized by the fact that the first UE is configured with a side link feature within which a part of the parameters is assigned a first value for the first mode and a second value for the second mode and other parameters are assigned a common value to the first and second modes;
    where transmitting a side link signal comprises:
    in response to determining the side link transmission mode as the first mode, transmitting the side link signal within the side link facility using the corresponding parameters for the first mode according to the first mode; and in response to determining the side link transmission mode as the second mode, transmitting the side link signal within the
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    4/12 side link using the corresponding parameters for the second mode, according to the second mode.
    [11]
    11. Method according to any one of claims 8 to 10, characterized by the fact that the first UE further transmits additional signals to encompass the side link feature.
    [12]
    12. Method according to claim 1, characterized by the fact that it additionally comprises:
    determine (510) which side link transmission mode should be used for reception; and receiving (520) a side link signal using the given side link transmission mode.
    [13]
    13. Method, according to claim 12, characterized by the fact that determining which side link transmission mode should be used for reception comprises:
    receiving a second side link signal;
    decoding the second received side link signal using the first mode and the second mode respectively;
    in response to the second incoming side link signal being successfully decoded using the first mode, determining that the first mode should be used for reception; and in response to the second received side link signal being successfully decoded using the second mode, determining that the second mode should be used for reception.
    [14]
    14. Method according to claim 12, characterized by the fact that the first UE is configured with a receive feature, a first transmit feature for the first mode and a second transmit feature for the second mode, the reception covering the first
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    5/12 and according to transmission resources, and determining which side link transmission mode should be used for reception comprises:
    detecting whether a second side link signal is received using the first mode or the second mode within the first transmission resource;
    in response to the detection of the receipt of the second side link signal, determine that the first mode or the second mode must be used within the first transmit-to-receive feature;
    detecting whether the second side link signal is received using the first mode or the second mode within the second transmission resource;
    in response to the detection of the receipt of the second side link signal, determine that the first mode or the second mode must be used within the second transmission-to-reception facility;
    detecting whether the second side link signal is received using the first mode or the second mode within the rest of the receiving facility; and in response to detecting the receipt of the second side link signal, determining that the first mode or the second mode should be used within the remainder of the receive to receive feature.
    [15]
    15. Method according to claim 12, characterized in that the first UE is configured with a first reception feature for the first mode and a second reception feature for the second mode, and in which to determine which mode of transmission side link must be used for reception comprises:
    detecting whether a second side link signal is received within the first receiving resource or within the second receiving source;
    in response to the detection that the second side link signal is received within the first receive resource, determine which first mode should
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    6/12 be used for reception; and in response to the detection that the second side link signal is received within the first reception facility, determining that the first mode should be used for reception.
    [16]
    16. Method according to any one of claims 1 to 15, characterized by the fact that the first radio access technology is the New Radio access technology (NR) and the second radio access technology is the radio access technology. radio access by long-term evolution (LTE) and where the first mode is NR-based mode and the second mode is LTE-based mode.
    [17]
    17. Device (600) in user equipment that supports a first radio access technology characterized by the fact that it comprises:
    a processor (601); and a memory (602), said memory (602) containing instructions executable by said processor (601), whereby said device (600) is operative for:
    determining a side link transmission mode to transmit, the side link transmission mode being one of a first mode corresponding to the first radio access technology and a second mode corresponding to a second radio access technology; and transmitting a side link signal according to the side link transmission mode using a side link feature configured by a network node serving the user equipment.
    [18]
    18. Apparatus, according to claim 17, characterized by the fact that the apparatus is operative to determine a side link transmission mode by:
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    7/12 detect a side link signal from other side link transmissions;
    determine which side link transmission mode is used for the other side link transmissions;
    in response to any of the other side link transmissions using the second mode, determine the side link transmission mode as the second mode; and in response to all other side link transmissions using the first mode, determining the side link transmission mode as the first mode.
    [19]
    19. Apparatus, according to claim 17, characterized by the fact that the apparatus is operative to determine a side link transmission mode by:
    determine which radio access technology is supported by at least one second UE in the vicinity;
    in response to any one of the at least one second UE supports the second radio access technology, determining the side link transmission mode as the second mode; and in response to all at least one second UE that supports the first radio access technology, determining the side link transmission mode as the first mode.
    [20]
    20. Apparatus according to claim 19, characterized by the fact that the apparatus is operative to determine which radio access technology is supported by at least one second UE in the vicinity based on a capacity information of at least one second EU that was obtained by the first EU.
    [21]
    21. Apparatus, according to claim 17, characterized by the fact
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    8/12 that the apparatus is operative to determine the side link transmission mode based on the preconfiguration of the first mode or the second mode for the user equipment.
    [22]
    22. Apparatus according to claim 17, characterized in that the apparatus is operative to determine the side link transmission mode based on a transmission requirement for the side link transmission.
    [23]
    23. Apparatus according to claim 17, characterized by the fact that the apparatus is operative to determine the side link transmission mode based on a resource configuration dedicated to the first mode or the second mode for the user equipment.
    [24]
    24. Apparatus, according to claim 17, characterized by the fact that the network node supports the second radio access technology;
    and in which the apparatus is operative to transmit a signal of lateral link by:
    in response to determining the side link transmission mode as the first mode, adapt the configuration of the side link feature to the first mode; and transmitting a side link signal using the side link feature adapted according to the first mode; and in response to determining the side link transmission mode as the second mode, transmitting the side link signal using the side link feature according to the second mode.
    [25]
    25. Apparatus according to claim 17, characterized by the fact that the user equipment is configured with a first side link feature for the first mode and a second side link feature for
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    9/12 the second way;
    in which the device is operative to transmit a side link signal by:
    in response to determining the side link transmission mode as the first mode, transmitting the side link signal using the first side link feature according to the first mode; and in response to determining the side link transmission mode as the second mode, transmitting the side link signal using the second side link feature according to the second mode.
    [26]
    26. Apparatus according to claim 17, characterized by the fact that the user equipment is configured with a side link feature within which a part of the parameters is assigned a first value for the first mode and a second value for the second mode and other parameters are assigned a value common to the first and second modes;
    and in which the apparatus is operative to transmit a signal of lateral link by:
    in response to determining the side link transmission mode as the first mode, transmitting the side link signal within the side link facility using the corresponding parameters for the first mode according to the first mode; and in response to determining the side link transmission mode as the second mode, transmitting the side link signal within the side link resource using the corresponding parameters for the second mode, according to the second mode.
    [27]
    27. Apparatus according to any of claims 24 to 26, characterized by the fact that the apparatus is operative to transmit additional signals to encompass the side link feature.
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    12/10
    [28]
    28. Apparatus according to claim 17, characterized by the fact that the apparatus is additionally operative for:
    determine which side link transmission mode should be used for reception; and receiving a side link signal using the specified side link transmission mode.
    [29]
    29. Apparatus according to claim 28, characterized by the fact that the apparatus is operative to determine which side link transmission mode should be used for reception by:
    receiving a second side link signal;
    decoding the second received side link signal using the first mode and the second mode respectively;
    in response to the second incoming side link signal being successfully decoded using the first mode, determining that the first mode should be used for reception; and in response to the second received side link signal being successfully decoded using the second mode, determining that the second mode should be used for reception.
    [30]
    30. Apparatus according to claim 28, characterized by the fact that the user equipment is configured with a reception feature, a first transmission feature for the first mode and a second transmission feature for the second mode, the feature of reception covering the first and second transmission resources, and in which the device is operative to determine which side link transmission mode should be used for reception by:
    detecting whether a second side link signal is received using the first mode or the second mode within the first transmission resource;
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    11/12 in response to the detection of the receipt of the second side link signal, determine the first mode or the second mode that should be used within the first transmission-to-reception feature;
    detecting whether the second side link signal is received using the first mode or the second mode within the second transmission resource;
    in response to detecting the receipt of the second side link signal, determining the first mode or the second mode that should be used within the second transmission to reception facility;
    detecting whether the side link signal is received using the first mode or the second mode within the rest of the receiving facility; and in response to detecting the receipt of the second side link signal, determining the first mode or the second mode that is to be used within the remainder of the receive to receive feature.
    [31]
    31. Apparatus according to claim 28, characterized by the fact that the user equipment is configured with a first reception feature for the first mode and a second reception feature for the second mode, and in which the device is operative to determine which side link transmission mode should be used for reception by:
    detecting whether a second side link signal is received at the first receiving resource or the second receiving source;
    in response to the detection that the second side link signal is received within the first reception facility, determine that the first mode should be used for reception; and in response to the detection that the second side link signal is received within the first reception facility, determining that the first mode should be used for reception.
    [32]
    32. Apparatus according to any one of claims 17 to 31,
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    12/12 characterized by the fact that the first radio access capability is the New Radio access technology (NR) and the second radio access capability is the long term evolution radio access technology (LTE) and wherein the first mode is NR-based mode and the second mode is LTE-based mode.
    [33]
    33. Computer-readable storage medium characterized by the fact that having a computer program stored therein, the computer program executable by a processor to cause the processor to perform the method as defined in any of claims 1 to 16.
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    PCT/CN2018/073396|WO2018149265A1|2017-02-20|2018-01-19|Method and apparatus for sidelink transmission control|
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