• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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    • 专利摘要:
    The present invention is a channel identifier in a DEQ negotiation control layer in a delay equalization (DEQ) protocol structure consisting of a Call Control layer, a DEQ Negotiation Control layer, and a DEQ multiframe control layer. A method of handling timer end primitives. The method for processing the channel identifier timer termination primitive of the present invention is a delay equalization protocol for multiple combining N 56/64 kbit / s channels and equalizing the delay of the combined channels in order to provide the bandwidth required for the service. A comprehensive information communication network comprising a call control layer (CC), a delay equalization negotiation control layer (DEQ NC), and a delay equalization multiframe control layer (DEQ MC), comprising: a) receiving a primitive; b) determining the current state of the delay equalization negotiation control layer; And c) if the determination result in step b indicates that the active CID = 1 waiting state or the call initial CID = 1 waiting state, delivering a channel identification failure indication primitive to the call control layer and maintaining the current state. Therefore, when the channel identifier timer end primitive is generated, the present invention can be quickly delivered to the call control layer according to the present invention so that appropriate measures can be taken.
    公开号:KR19990032816A
    申请号:KR1019970053968
    申请日:1997-10-21
    公开日:1999-05-15
    发明作者:이진호
    申请人:전주범；대우전자 주식회사；
    IPC主号:
    专利说明:

    Method of processing CID = 1 timer expiry primitive according to delay equalization protocol in ISDN
    The present invention relates to a delay equalization protocol for bonding a plurality of 56/64 kbit / s channels in order to deliver broadband data in an ISDN, in particular, call control. How to handle channel identifier timer termination primitive in DEQ negotiation control layer in DEQ protocol structure composed of Control layer, DEQ Negotiation Control layer and DEQ multiframe control layer It is about.
    As the information society has progressed, communication demands have diversified, and the media handled by communication networks such as voice, data, and video have also diversified, so that individual networks established by services cannot provide efficient services. Therefore, the ISDN, which can integrate and digitize individual networks established by services and provide comprehensive services, has emerged. These ISDNs are designed to unify various terminals in order to accommodate users and manganese. The interface is standardized by Digital Subscriber Signaling System (DSS1), and the interface between the network and the network is also standardized by No.7 Common Line Signaling (CCS).
    DSS1, which is a signaling method of the user-network interface (UNI) of ISDN, is implemented in layers 1 through 3 by an OSI (Open Systems Interconnection) reference model, as shown in FIG. The overview and its relationship with the recommendations of the ITU-T are shown in Table 1 below.
    Digital subscriber line signaling Layer Function Outline Corresponding recommendations Layer 1 Electrical physical conditions I.430, I.431 Layer 2 Link setting control and error control for message transmission Q.920, Q.921 Layer 3 Set up, opening Q.930, Q.931
    Referring to FIG. 1, a first network terminal device NT1 located in a house (or building) is connected to an ISDN exchange located in a telephone station through a subscriber line, and an ISDN terminal TE1 is connected to an ISDN terminal in a building through an S / T point. Alternatively, the second network terminal device NT2 is connected to the first network terminal device NT1.
    Here, 'NT1' (network terminal device 1) is a transceiver in a house for transmitting a digital signal to a subscriber line, and 'NT2' (network terminal device 2) is a device corresponding to a private branch exchange (PBX). The terminal TE1 can be accommodated, and the TE1 is an ISDN standard terminal that is directly connected to NT1 and may be connected via NT2, and an existing terminal that does not have an ISDN corresponding function, 'TE2' is not shown. It is connected to the ISDN network through a terminal adapter (TA).
    In addition, the interface point between NT1 and NT2 is called 'T' point, and the interface point between NT2 and TE1 is called 'S' point. Since the interface specification of S point is determined to be based on T point, TE1 is The point to be connected is called the 'S / T' point.
    In addition, the subscriber terminal, such as the ISDN terminal, is connected according to the above-described protocols of the layers 1 to 3 so as to be connected to the ISDN exchange, and the recommendations for defining such a connection are shown in Table 1 above.
    That is, in Table 1, Layer 1 is a user-network interface of the physical layer recommended by ISDN Recommendations I.430 and I431, and has a basic interface of 2B + D access and a primary group speed interface of 23B + D or 30B + D. In the basic interface, the frame structure consists of 48 bits in 250us units.
    Layer 2 is commonly referred to as Link Access Procedure on the D channel (LAPD), which first adopts HDLC's BALANCE mode, which is the standard for the standardized data link layer, and its basic format is Flag. And an address field, a control field, an information field, a frame check sequence (FCS), and a flag.
    Layer 3 controls the establishment, maintenance, and release of communication paths required by the network and packet switched services, and various additional service requests. The message is analyzed and the call setup related message is formed and sent to the other party through the lower layer. General content relating to Layer 3 is described in Q.930, and call processing procedures for basic calls are recommended by Q.931.
    In order to implement an ISDN terminal, the functions described above should be implemented. The "protocol" is defined as an appointment between the same layers, and the "primitive" is defined as a logical exchange between upper and lower layers. . That is, each layer has entities that implement the functions of the layer, and these entities are configured to exchange information between upper and lower sides through primitives.
    These primitives are divided into four types: REQUEST, INDICATE, RESPONSE, and CONFIRM. Most of the primitives related to data transfer are REQUEST passed from the upper layer to the lower layer. ) Primitives, and INDICATE primitives passed from the lower layer to the upper layer.
    The CONFIRM primitive is a primitive that notifies the upper layer when the lower layer is obliged to respond to the specific request primitive from the upper layer, and the response primitive is a specific indication primitive from the lower layer. Is a primitive to inform the lower tier if the upper tier is obliged to respond.
    The channels provided by ISDN include 64 Kbps "B" channel, 16 kbps "D" channel, 384 Kbps "H0" channel, and 2.048 Mbps "H1" channel. It is defined as "2B + D" and the primary group interface is defined as "23B + D" or "30B + D". However, when a wideband communication connection is required for a video service in narrowband ISDN, multiple (N) 56 or 64 kbit / s channels may be used in combination. That is, if the basic interface or the primary group interface has a fixed bandwidth but various bandwidths are required according to a service, the ISDN network may provide an "N x 56/64 kbit / s" band.
    In order to provide "N x 56/64 kbit / s" as described above, bonding of 56/64 kbit / s channels set independently of each other is required. In this case, since each 56/64 kbit / s channels are individually connected by the digital switching network, each channel has an individual delay. Therefore, the key technical details of multiple coupling are related to delay equalization, so follow "Delay EQualization protocol" to provide N x 56/64 kbit / s. That is, the delay equalization protocol is also called a bonding protocol, and is a protocol for equalizing delay between channels when combining N 56/64 kbit / s channels.
    As shown in FIG. 2, the delay equalization protocol is composed of a Call Control layer, a DEQ negotiation control layer 22, and a DEQ multiframe control layer 23. User data received from the application layer 21 is transmitted, and primitives are transferred to each other as shown in FIG. 3. In FIG. 2, the DEQ multiframe control layer 23 is connected to the physical medium through each channel control and physical medium dependency (PMDL) layer 24a to 24c below.
    Referring to FIG. 3, primitives transmitted from the call control layer 25 to the DEQ negotiation control layer 22 include an initial request (DQ_INIT_REQ), a connection request (DQ_CONN_REQ), a disconnect request (DQ_DISC_REQ), and a channel deletion request (DQ_DEL_CH_REQ). , Channel addition request (DQ_ADD_CH_REQ), abandonment request (DQ_ABORT_REQ), DQ_RL_REQ, DQ_LL_RESP, DQ_LL_OFF_REQ, and the timers used in the DEQ NC layer include TCID_EXP, TCINIT_EXP, TAINIT_EXP, TANULL_EXP, TAADD01_EXP, and TAADD01_EXPP. And a primitive transferred to the DEQ negotiation control layer (22) of the control layer 25 from the DQ_INIT_IND, DQ_DISC_IND, DQ_DISC_CONF, DQ_DEL_CH_CONF, DQ_DEL_CH_IND, DQ_DEL_CH_FAIL_IND, DQ_ADD_CH_IND, DQ_ADD_CH_CONF, DQ_ADD_CH_FAIL_IND, DQ_CID_FAIL_IND, DQ_LLOS_IND, DQ_RLOS_IND, DQ_ABORT_CONF, DQ_LL_IND, DQ_LL_OFF_IND , DQ_RL_IND, DQ_RL_OFF_IND, and so on. In this case, xx_xxxx_REQ represents a request primitive, xx_xxxx_IND represents an indication primitive, xx_xxxx_RES represents a response primitive, and xx_xxxx_CFM represents an confirm primitive. CC_xxxx_xxx is a primitive between the DEQ multiframe control layer and the DEQ negotiation control layer, and DQ_xxxx_xxx is a primitive between the DEQ negotiation control layer and the call control layer.
    The primitives delivered from the DEQ negotiation control layer 22 to the DEQ multiframe control layer are CC_ADD_REQ, CC_INFO_REQ, and CC_DEL_REQ. The timers used in this layer include TAFA_EXP, TXDEQ_EXP, and DEQ negotiation control layer in the DEQ multiframe control layer. Primitives to be transmitted include CC_LSYNCH_IND, CC_RSYNCH_IND, CC_RSYNCH_FAIL_IND, CC_INFO_IND, CC_FAIL_IND, CC_LLOS_IND, and CC_RLOS_IND. These primitives are described in detail in the "Interoperation Specification for Nx56 / 64 kbit / s Call (Version 1.1)" issued by the Bonding Consortium, dated September 2, 1993, and further description thereof is omitted.
    On the other hand, the conventional way of handling such primitives in Layer 3 has been proposed as SDL in Appendix A (ANNEX A) of the Recommendation, which is summarized as shown in FIG. Referring to FIG. 8, the conventional method first determines a current state of a corresponding layer (S1), and when a primitive is received (S2), drives a primitive processing routine for processing the corresponding primitive according to the determined state (S3). ).
    However, this conventional method has a problem in that even if the same primitive, the processing routine is duplicated according to each state, so that the amount of code increases and the processing time becomes long. In order to avoid such duplication, when processing by a subroutine call method, there is a problem that the processing speed decreases according to the calling procedure even though the code amount is reduced.
    Accordingly, the present invention has been proposed to solve the above-mentioned problems. When the channel identifier timer is terminated and the timer termination primitive is received, the channel identifier timer termination primitive processing method according to the delay equalization protocol can minimize the processing procedure. The purpose is to provide.
    In order to achieve the above object, the present invention provides a call control layer including a delay equalization protocol for multiple combining N 56/64 kbit / s channels and equalizing the delay of the combined channels to provide a broadband required for service. A general information communication network (CC) comprising a delay equalization negotiation control layer (DEQ NC) and a delay equalization multiframe control layer (DEQ MC), comprising: a) receiving a primitive; b) determining the current state of the delay equalization negotiation control layer; And c) if the determination result in step b indicates that the active CID = 1 waiting state or the call initial CID = 1 waiting state, delivering a channel identification failure indication primitive to the call control layer and maintaining the current state.
    1 shows a user-network connection of an ISDN;
    2 shows a reference architecture of a delay equalization protocol;
    3 is a schematic diagram illustrating primitives carried between layers to implement a delay equalization protocol in ISDN,
    4 illustrates a frame structure in a delay equalization protocol;
    5 shows an information message format;
    6 is a flowchart illustrating a process of establishing a call in a delay equalization protocol;
    7 is a flowchart illustrating a flow of processing a channel identifier timer end primitive according to the present invention;
    8 is a schematic diagram illustrating a conventional procedure for processing primitives.
    * Explanation of symbols for main parts of the drawings
    21: Application Layer 22: Delay Equalization Negotiation Control Layer
    23: Delay Equalized Multiframe Control Layer 24a, 24b, 24c: Channel Control Physical Layer
    25: call control layer
    Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
    FIG. 2 is a diagram illustrating a reference architecture of a delay equalization protocol, FIG. 3 is a schematic diagram illustrating primitives transmitted between three layers for implementing a delay equalization protocol in ISDN, and FIG. 4 is a diagram illustrating a frame structure in a delay equalization protocol. Figure is shown. 5 is a diagram illustrating an information message format.
    Referring to FIG. 2, the delay equalization protocol is implemented by a call control (CC) layer 25, a delay equalization negotiation control (DEQ NC) layer 22, and a delay equalization multiframe control (DEQ MC) layer 23. As shown in FIG. 3, various primitives are transmitted between the layers.
    In order to deliver the serial bit stream coming down from the application layer by multiple combinations of N 56/64 kbit / s channels, as shown in FIG. 4, framing is required, and the framed data is allocated to each bearer channel. Will be delivered.
    As shown in FIG. 4, the framing structure according to the delay equalization protocol is composed of 256 octets, and 64 frames are gathered to form one multiframe. The octets in each frame are numbered from 1 to 256, and four overhead octets are used for information exchange and framing. That is, in one frame, octet 64 is assigned to a frame alignment word (FAW), octet 128 is assigned to an information channel (IC), and octet 192 is assigned to a frame count (FC). Is assigned. Octet 256 is assigned to the CRC.
    Looking more closely at each overhead octet, the FAW (octet 64) has a fixed value of "0001,1011", the IC (octet 128) is used for information exchange between terminals, and the FC (octet 192) is an individual channel. It is used to measure the relative change in delay between modulo 64 counters (6 bits), incremented by 1 per frame. In CRC (octet 256), bit 1 and bit 8 are 1, bit 2 is defined as "A", bit 3 as "E", and bits 4 to 7 are used for CRC4. Here, "A" is an alignment bit, indicating that the remote terminal has lost framing, and "E" is an error bit, indicating that the remote terminal has detected a CRC4 error.
    This overhead distributes the overhead octets across all channels as evenly as possible by allowing them to be distributed over each channel at 125usec intervals.
    On the other hand, the information channel message format is composed of 16 octets, as shown in Figure 5 to transfer control information between the two terminals. Referring to FIG. 5, when the first octet of an information channel frame has an constant value of "0111 1111" as an alignment, and the second octet is a channel identifier (Channel ID: CID) when dialing N calls simultaneously. It is used to identify individual channels in each call setup. CID is a 6-bit binary number encoded with a number in the range of 0 to 63, and a CID of 0 indicates parameter negotiation.
    The third octet of the information channel message is the group identifier (GID), which is used to uniquely identify a group of bearer channels that associate a particular call. Octet 4 (bits 2 through 4) indicates the operation mode (MODE), where "0" indicates operation mode 0, "1" indicates operation mode 1, "10" indicates operation mode 2, and "11" indicates operation mode. 3 is shown, respectively. In octet 5 (bits 2 to 4) of FIG. 5, "RMULT" is the rate multiplier, which, together with "SUBMULT" in octet 6, defines the bandwidth of the application for the call, and the BCR represents the bearer channel rate. 0 indicates 56kbit / s base and 1 indicates 64kbit / s base. In octet 6, " MFG ", if set to 1 as the manufacturer ID flag, indicates that the manufacturer ID is loaded in the digit fields of octets 10-16. In octet 8, " RI " is a remote indicator for informing the counterpart of whether the delay equalization is completed, and a value of 1 indicates an even delay (delay equalization completion). In octet 7, "RL REQ" indicates a remote loopback request and "RL IND" indicates a remote loopback indication. "REV" represents the revision level, octet 8 represents the subaddress, and octet 9 represents the transfer flag as "XFLAG". Octet 10 to octet 16 indicate telephone number dial digits (Digit-1 to Digit-7).
    On the other hand, Figure 6 is a sequence diagram showing a message flow in call setup.
    First, the terms used in the present invention are briefly defined as follows. The answering terminal is a terminal for receiving a call, and the calling terminal is a terminal for initiating a call. The bearer channel is a channel provided by a network used for data transmission, for example, a B channel of BRI or PRI, a T1 DS0, etc., and an information message is a 16 octet message as shown in FIG. It is conveyed through the information channel of the multiframe structure or by the full bandwidth of the master channel during initial parameter negotiation. Master channel is a channel used to communicate control information between each end. This channel is called call setup, channel delete, channel addition, remote loopback. It provides a path for initial parameter negotiation for loopback, call disconnection, etc.
    In case of using the delay equalization protocol, four operation modes are defined. "Operation Mode 0" supports initial parameter negotiation and DIRECTORY NUMBER exchange on the master channel, and then transfers the data without delay equalization when call setup is complete. This mode is useful when the calling endpoint requires a phone number, but delay equalization must be done by other means. That is, in operation mode 0, no delay equalization is performed.
    "Operation Mode 1" is the default (common) mode of the delay equalization protocol that supports the user data rate multiplied by the bearer rate, and does not provide in-band monitoring for errors. Thus, the overhead octets for detecting errors are eliminated after the call is aligned, and one or more on-channel error conditions that prevent all system synchronization are not automatically recognized after the call is ACTIVE.
    "Operation Mode 2" supports user data rates that are 63/64 times the bearer rate. This mode of operation provides in-band monitoring and the user data rate is the remaining band after the insertion of the overhead octets. That is, the error is checked while the multiframing structure is maintained even after being activated.
    "Operation Mode 3" is the user data rate is an integer multiple of 8kbit / s, including Nx56 and Nx64. All channels use the same bearer channel rate and provide in-band monitoring to support continuous equalization (CRC) for delay equalization and end-to-end bit error test. The overhead octets required for error monitoring are provided with additional bandwidth. Thus, a sufficient user data rate can be provided, and overhead octets are included in each bearer channel.
    Based on the understanding of such a definition, a process of actually setting up a call according to a bonding protocol and transmitting data will be described with reference to FIG. 6.
    When a high speed serial data stream comes down from the application layer, data is transmitted through N bearer channels. Each bearer channel is then individually connected by digital network exchange. On the originating terminal side, the user data is framed according to the framing structure as shown in FIG. 4 and then delivered to each bearer channel. On the destination terminal side, the received data is synchronized and aligned to restore the original bit stream. do. Framing and synchronization should be transparent to all applications.
    In the delay equalization protocol, the entire operation is performed by the call establishment process, the process of adding the bandwidth to the existing call after the channel connection is established by the call establishment, and the bandwidth is deleted from the existing call in order to reduce the user data without sudden degradation of the entire call. There is a process.
    The call setup process involves establishing an initial channel (called a master channel), adding N-1 other channels by multiple combining after the initial channel is established, and implementing delay equalization when each channel is connected. There is a delay equalization (DEQ) process.
    6 is a flowchart illustrating a call setup process, wherein the initial channel setup includes steps 601 to 604, the multiple combining process includes steps 605 and 606, and the DEQ process includes steps 607 to 609. After the call setup is made, user data of the application layer is allocated to each channel through a predetermined framing process in an active state.
    The initial call setup procedure begins with the connection of the first channel on an N x 56/64 kbit / s call. This channel is called the master channel (601). The parametric negotiation process is performed by this channel, and the originating terminal makes additional calls after the complete negotiation process is completed. Once the originating terminal is connected to the master channel, the originating terminal repeatedly transmits an information message (see FIG. 5) with a channel identifier (CID) set to 0 to start a negotiation process (602). The starter (TCINIT_EXP) timer is started. At this time, the originating terminal transmits by setting each parameter of the information message to a specific value. The group identifier (GID) is set to 0, and RI = 0 and RL = 0, respectively. In the first information message, the calling terminal sets the MFG to 1, sends the manufacturer's ID with the ID in the digit field, and the XFLAG is set to all 1's. If the calling terminal fails to transmit the manufacturer ID, the MFG flag is set to 0 and the digit fields are all set to 1. If the calling terminal supports sub-addressing, the sub-address area includes the sub-address, and if not, the corresponding area is set to all zeros.
    When a call is received and connected with the other party, the destination terminal sends all 1s to the channel, starts the destination NULL (TANULL_EXP) timer, and searches for multi-frame information or information message.
    Once the end of incoming call detects a valid information message, it considers the channel as the master channel of the new call and stops the terminating null timer (TANULL_EXP). If a multi-frame is detected, the called terminal regards the current call as an additional channel, stops the called party NULL (TANULL_EXP) timer, and uses a group identifier (GID) to identify the current call.
    In the master channel of the new call, if the called terminal accepts the requested parameter, it returns the same value as the received value and starts the called party's initial (TAINIT_EXP) timer. If not accepted, the RMULT and SUBMULT = 0 return with the valid mode value in the information message, and the called party initiates the truncation procedure or returns a set value different from the received parameter. In the additional channel of the current call, the called terminal allocates the group identifier (GID) of the call and returns the call in the group identifier (GID) area. The call can be identified in the call received by the group identifier to the called terminal. At this time, the XFLAG region of the information message is set to one.
    When the called terminal determines the manufacturer ID return, the MFG flag of the information message is set to 1, puts the ID in the digit field, and returns the information message with other parameters as the initial response to the calling terminal. If the destination terminal does not want to return the manufacturer ID, the MFG flag of the information message is set to 0 and the digit field is set to 1.
    The calling terminal detects that the response is from the called terminal when CID = 0 and the MODE receives a valid information message from the called terminal. Therefore, the calling terminal analyzes the parameters of the received information message and performs the truncation procedure if it cannot accept or cannot accept the parameters requested by the called terminal. If the MFG flag of the received information message is 1, the manufacturer ID contained in the digit field is received. If the MFG flag is 0, the digit area is ignored, and the XMFG flag is ignored.
    Subsequently, the originating terminal requests an initial telephone number (Directory Number: DN) by transmitting an information message with CID = 0 and a transmission flag set to 1 and all of the digit fields to 1 (603).
    After the initial response, when the called terminal receives the information message with the XFLAG set to 1, the destination terminal sets the XFLAG of the information message to 1 and carries the telephone number in the digit field and returns the information message again. In this way, the calling terminal and the called terminal exchange telephone numbers (DN). If the number of channels is N, exchange N-1 phone numbers (DNs).
    That is, when the calling party receives DQ_CONN_REQ from the call control layer to the DEQ negotiation control layer, the DEQ carries an INIT REQ message on the CC_INFO_REQ primitive and delivers it to the called party. When the called party receives the INIT REQ message through CC_INFO_IND, the called party sends the INIT ACK message to the called party. The calling party sends a DN REQ message to the called party and requests a phone number. When the called party receives a DN REQ message, the called party generates a DN RESP message and sends the telephone number to the calling party. This telephone number exchange operation is repeated N-1 times (603).
    Subsequently, when the telephone number exchange is completed, the calling terminal transmits an information message of CID = 1 to signal the end of the negotiation process, and when the called terminal receives an information message of CID = 1, the calling terminal returns an information message of CID = 1 and adds it. Inform that the channel is ready for acceptance. At this time, the called terminal stops the called party initial (TAINIT_EXP) timer and starts the called channel addition (TAADD01_EXP) timer (604,605).
    When the originating terminal receives the information message with CID = 1, the originating terminal (TCINIT_EXP) timer is stopped, the originating channel addition (TCADD01_EXP) timer is started, and connection to the additional channel is started (606).
    Once each additional channel is connected, each terminal stops the channel add (TXADD01) timer. When each channel is ready, the terminating terminal starts a delay equalization (TXDEQ_EXP) timer and uses a frame counter (FC) to measure the relative delay balance between individual channels of Nx56 / 64 kbit / s (607). . In addition, since the incoming call arrival order cannot be guaranteed to be the same as the call establishment order, each terminal uses the received CID to align the channel (607). Each terminal is rearranged, and if the delay is equalized between channels for the call, RI = 1 of the information message is transmitted in all channels of other terminals (608). In each of the modes 2 and 3, when each terminal receives RI = 1 as an information message in all channels, it will consider that call setup is completed, and the delay equalization (TXDEQ_EXP) timer is stopped and user data transmission is started (609, 610).
    In operation mode 1, when each terminal receives RI = 1, it will transmit a ready indication for data transmission to A = 0 in all bearer channels. When A = 0 is transmitted, each UE waits for A = 0 reception on each bearer channel. When each terminal receives A = 0 in the bearer channel, it stops transmitting the framing pattern and considers the call setup to be completed. At this time, each terminal will remove the multiframe structure from all channels. In addition, after transmitting RI = 1 and A = 0, if the frame synchronization loss is detected in all bearer channels before the UE receives A = 0, the call setup is considered complete and the multiframe structure is removed from the bearer channel. In modes 2 and 3, each terminal continuously monitors each channel of the call for delay equalization and frame alignment. Each terminal also monitors bit errors between terminals, transmits RI = 1, and stops the delay equalization (TXDEQ_EXP) timer when it detects RI = 1.
    On the other hand, when a call is established by multiple combining in this way, each state of the DEQ multiframe control layer and the DEQ negotiation control layer is defined as shown in Tables 2 to 4 below.
    Status of the DEQ negotiation control layer (calling side) State nameMarkContents Null state0No call exists Call initiationOneCalling party sends INIT REQ on the first channel and waits for INIT ACK Initiate-CID1 Wait1aWaiting for CID = 1 after sending the CID = 1 after completing parameter negotiation and DN exchange Wait for phone number2Calling party waits for receiving after requesting additional DN Additional Channel3Status of setting remaining channel after completing parameter negotiation and DN exchange active8All channels are set up so that DEQ multiframe can transmit data Active-Delete Initiation8aWaiting for response after calling party requests channel deletion Active-start8b-1Calling party waits for response after requesting channel Active-Additional Channel8b-2The originator sets up additional channels after receiving a positive response to the channel part.
    Status of the DEQ negotiation control layer (calling side) Active-CID1 Standby8cThe calling party waits for a response after sending CID = 1 as a signal of completion of a channel addition or deletion. Active mode 18dMode 1 is active and information messages are not exchanged and messages are transferred between CC and DEQ MC. Release request9Waiting for response after calling party requests release
    Status of DEQ negotiation control layer (receive side) State nameMarkContents Null state0No call exists Receive call4The called party receives the channel connection request INIT Receive5Received INIT ACK and received INIT ACK Additional Channel Standby6Waiting for setting of remaining channel after completion of parameter negotiation and DN exchange at called party active8All channels are set up so that DEQ multiframe can transmit data Active-Delete Initiation8aCalled party waits for response after requesting channel deletion Active-start8b-1The called party waits for a response after requesting channel addition Active-Additional Channel8b-2The called party sets up additional channels after receiving a positive response to the channel part. Active-CID1 Standby8cThe called party waits for a response after sending CID = 1 as a signal of completion of a channel addition or deletion. Active mode 18dMode 1 is active and information messages are not exchanged and messages are transferred between CC and DEQ MC. Release request9Waiting for response after called party requests to release
    DEQ multiframe control layer State nameMarkContents Null state0Waiting for channel to be connected to multi-frame function Unknown synchronous search state0aAfter the called party is connected to the channel, it waits to receive the information message of multi-frame synchronization or initial channel Local synchronous standbyOneThe endpoint waits for multiframe synchronization for all channels while sending a multiframe pattern Remote Sync Standby2Waiting for endpoint to be multi-frame synchronized after multi-frame synchronization is completed for all channels Mode 1 Handshake2aIn mode 1, the endpoint is waiting for A = 0 or loss of synchronization after sending RI = 1 or A = 0. All Channel Synchronization3Multi-frame synchronization and DEQ equalization completed on all channels Mode 1 active3aFraming is removed and data is passed in mode 1
    7 is a flowchart illustrating a flow of processing a channel identifier timer (TCID) end primitive according to the present invention.
    During the call setup, the channel identifier timer (TCID) is started while sending an information message with CID = 1 or while waiting for an information message with CID = 1, and when the information message with CID 1 is received, the channel identifier timer (TCID) is started. Stop. The channel identifier timer (TCID) has a default value of about 5 seconds, which can be set from 1 second to 5 seconds.
    Referring to FIG. 7, when a channel identifier timer (TCID) ends, a channel identifier timer termination primitive is generated and received by the delay equalization negotiation control (DEQ NC) layer (701). Accordingly, the DEQ NC layer determines the current state, and if the current state is the active CID = 1 waiting state or the call initial CID = 1 waiting state, the channel identification failure indication is indicated in the call control (CC) layer (DQ_CID_FAIL_IND). Pass primitives and maintain the current state (702, 703, 704, 705, 706).
    As described above, when the channel identifier timer termination primitive is generated, the present invention has an effect of promptly delivering to the call control layer to take appropriate measures.
    权利要求:
    Claims (1)
    [1" claim-type="Currently amended] A delay equalization protocol for multiplexing N 56/64 kbit / s channels to equalize the bandwidth required for service and equalizing the delay of the combined channels is called a call control layer (CC), a delay equalization negotiation control layer (DEQ). In the general information communication network including NC), delay equalization multi-frame control layer (DEQ MC),
    a) receiving a channel identifier timer end primitive received at the DEQ NC layer;
    b) determining a current state of the delay equalization negotiation control layer; And
    c) if the determination result in step b indicates that the active CID = 1 waiting state or the call initial CID = 1 waiting state, delivering a channel identification failure indication primitive to the call control layer and maintaining the current state. Channel identifier timer termination primitive processing according to delay equalization protocol in information and communication network.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1997-10-21|Application filed by 전주범, 대우전자 주식회사
    1997-10-21|Priority to KR1019970053968A
    1999-05-15|Publication of KR19990032816A
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019970053968A|KR19990032816A|1997-10-21|1997-10-21|Channel Identifier Timer Primitive Processing Method according to Delay Equalization Protocol in Integrated Telecommunication Network|
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