CN105792372B

CN105792372B - Data communication method, device and system

Info

Publication number: CN105792372B
Application number: CN201610122393.2A
Authority: CN
Inventors: 徐燕; 罗正华; 黄成富
Original assignee: Hytera Communications Corp Ltd
Current assignee: Hytera Communications Corp Ltd
Priority date: 2016-03-02
Filing date: 2016-03-02
Publication date: 2019-12-27
Anticipated expiration: 2036-03-02
Also published as: CN105792372A

Abstract

The embodiment of the invention provides a data communication method, which comprises the following steps: a first terminal determines an idle channel and sends a data handshake request carrying interrupt information on the idle channel; the interruption information comprises at least an indication to interrupt a call of a traffic channel; receiving data handshake response sent by the transfer platform; when the type of the data handshake response is the data handshake response allowing interruption, jumping to a service channel appointed by the relay according to a jumping channel indication contained in the data handshake response; and when determining that the second terminal occupying the service channel for calling interrupts the call and releases the resource of the service channel, initiating the call on the service channel. The embodiment of the invention can interrupt the call of the sending terminal and release the channel resource, and has strong flexibility and high efficiency.

Description

Data communication method, device and system

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a method, a device and a system for data communication.

Background

An Extended virtual cluster (XPT) system is a distributed cluster system without a control center. An XPT system may consist of a plurality of stations, each station having a plurality of transfer stations under it to provide a shared channel, the plurality of transfer stations comprising a fixed main transfer station and a plurality of slave transfer stations. The XPT system can furthest expand the system capacity under the premise of not increasing extra cost, effectively utilize the existing channel resources, and can completely meet the requirements of middle and low-end cluster customers. XPT systems do not require a dedicated control channel and this approach can satisfy the us FB6 frequency specification, whose frequency allocation can be shared with other systems, e.g., different users can allocate the same frequency. Therefore, the XPT system is widely used due to its advantages of low cost and high utilization rate of channel resources.

In the prior art, a situation that a receiving terminal cannot interrupt a call of a transmitting terminal to initiate a callback because people in the same call always occupy a channel exists. In addition, under the condition that all channel resources are occupied, the user with high priority wants to initiate a full call or an emergency call, and the user cannot interrupt the channel resources to initiate a call. Therefore, a method of interrupting a call of a transmitting terminal is required to meet the user's demand.

In existing centralized trunking systems, each terminal is managed by a dedicated control channel and control center. The control channel keeps a long transmission state at ordinary times, and all terminals wait on the control channel. When all channels in the system are occupied, the control center can release the channel resources by issuing an RC instruction to the designated terminal. However, this method requires a special control center and a control channel to manage the terminal, and when the channel resources are fully occupied by the control center, the control center issues an RC command to release the channel resources, which is not suitable for a distributed trunking system without a control center to interrupt the call of the sending terminal by the receiving terminal. Therefore, in the distributed cluster system without a control center, how to interrupt the call of the sending terminal by using the current system resources to reduce the waste of channel resources becomes a significant problem.

Disclosure of Invention

The embodiment of the invention provides a method, a device and a system for data communication, which can interrupt the call of a sending terminal and release channel resources and have strong flexibility and high efficiency.

In a first aspect, an embodiment of the present invention provides a data communication method, which is applied to a first terminal, and the method includes:

determining an idle channel, and sending a data handshake request carrying interrupt information on the idle channel; the interruption information comprises at least an indication to interrupt a call of a traffic channel;

receiving data handshake response sent by the transfer platform;

when the type of the data handshake response is the data handshake response allowing interruption, jumping to a service channel appointed by the relay according to a jumping channel indication contained in the data handshake response;

and when determining that the second terminal occupying the service channel for calling interrupts the call and releases the resource of the service channel, initiating the call on the service channel.

In a second aspect, an embodiment of the present invention provides a data communication method, which is applied to a relay station, and the method includes:

detecting a data handshake request which is sent by a first terminal and carries interrupt information; the interruption information comprises at least an indication to interrupt a call of a traffic channel;

determining a service channel for interrupting the call according to the indication for interrupting the call of the service channel;

sending a data handshake response to the first terminal, wherein the data handshake response comprises a data handshake response type and a jump channel indication; the jump channel indication is used for indicating the first terminal to jump to a service channel appointed by the relay station, and the appointed service channel is the same as the service channel for determining the interrupted call;

and embedding a call interruption indication in a channel adjacent to the determined call interruption traffic channel, wherein the call interruption indication is used for indicating a second terminal staying on the determined call interruption traffic channel to interrupt the call and release the resource of the traffic channel.

In a third aspect, an embodiment of the present invention provides an apparatus for data communication, where the apparatus includes:

a sending unit, configured to determine an idle channel, and send a data handshake request carrying interrupt information on the idle channel; the interruption information comprises at least an indication to interrupt a call of a traffic channel;

the receiving unit is used for receiving data handshake response sent by the transfer platform;

the skipping unit is used for skipping to a service channel appointed by the relay station according to a skipping channel indication contained in the data handshake response when the type of the data handshake response is the data handshake response allowing interruption;

and the calling unit is used for initiating a call on the service channel when the second terminal occupying the service channel for calling is determined to interrupt the call and release the resource of the service channel.

In a fourth aspect, an embodiment of the present invention provides an apparatus for data communication, where the apparatus includes:

the detection unit is used for detecting a data handshake request which is sent by the first terminal and carries the interrupt information; the interruption information comprises at least an indication to interrupt a call of a traffic channel;

a determining unit, configured to determine a service channel for interrupting the call according to the indication for interrupting the call of the service channel;

a first sending unit, configured to send a data handshake response to the first terminal, where the data handshake response includes a data handshake response type and a hop channel indication; the jump channel indication is used for indicating the first terminal to jump to a service channel appointed by the relay station, and the appointed service channel is the same as the service channel for determining the interrupted call;

a second sending unit, configured to embed a dropped call indication in a channel adjacent to the traffic channel for determining the dropped call, and to instruct the second terminal staying in the traffic channel for determining the dropped call to drop the call and release resources of the traffic channel.

In a fifth aspect, an embodiment of the present invention provides an apparatus for data communication, comprising a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors comprise instructions for:

receiving data handshake response sent by the transfer platform;

In a sixth aspect, embodiments of the present invention provide an apparatus for data communication, comprising a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured for execution by the one or more processors to include instructions for:

and embedding a call interruption indication in a channel adjacent to the traffic channel of the determined call interruption, wherein the call interruption indication is used for indicating the second terminal staying in the traffic channel of the determined call interruption to interrupt the call and release the resource of the traffic channel.

In a seventh aspect, an embodiment of the present invention provides a system for data communication, including a first terminal, a relay station, and a second terminal, where:

the first terminal is configured to: determining an idle channel, and sending a data handshake request carrying interrupt information on the idle channel; the interruption information comprises at least an indication to interrupt a call of a traffic channel; receiving data handshake response sent by the transfer platform; when the type of the data handshake response is the data handshake response allowing interruption, jumping to a service channel appointed by the relay according to a jumping channel indication contained in the data handshake response; when determining that a second terminal occupying the service channel for calling interrupts calling and releases the resources of the service channel, initiating the calling on the service channel;

the transfer table is used for: detecting a data handshake request which is sent by a first terminal and carries interrupt information; the interruption information comprises at least an indication to interrupt a call of a traffic channel; determining a service channel for interrupting the call according to the indication for interrupting the call of the service channel; sending a data handshake response to the first terminal, wherein the data handshake response comprises a data handshake response type and a jump channel indication; the jump channel indication is used for indicating the first terminal to jump to a service channel appointed by the relay station, and the appointed service channel is the same as the service channel for determining the interrupted call; embedding a dropped call indication in a channel adjacent to the traffic channel of the determined dropped call, for indicating the second terminal staying in the traffic channel of the determined dropped call to drop the call, and releasing the resource of the traffic channel;

the second terminal is configured to: when the call interruption indication is detected in the adjacent channel of the service channel for initiating the call, sending a voice ending frame to interrupt the call and release the resource of the service channel.

The data communication method, the device and the system provided by the embodiment of the invention can initiate a handshake request containing interrupt information by the terminal in an idle channel in the system, interrupt the terminal which is carrying out a call service by the relay station, release corresponding channel resources, and indicate the terminal initiating the handshake request to switch to the interrupted channel to initiate a call. The scheme provided by the invention can be used for initiating the interrupt request by the terminal, is flexible to realize and effectively reduces the waste of channel resources. In addition, the interrupt request and the handshake request are combined, so that the air interface overhead is saved, and the call collision is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of an application scenario of a data communication method according to an embodiment of the present invention;

FIG. 2 is a flow chart of a method of data communication according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a data unit PDU format of a data Handshake Request (Handshake Request) frame protocol carrying interrupt information;

FIG. 4 is a diagram illustrating a data Handshake Response (Handshake Response) PDU format;

FIG. 5 is a flow chart of a method of data communication according to an embodiment of the present invention;

FIG. 6 is a diagram illustrating the embedding of RC signaling in a data frame;

FIG. 7 is a diagram illustrating the embedding of RC signaling in a voice frame;

fig. 8 is a schematic diagram of a method for a relay station to maintain a channel for an interrupt terminal;

FIG. 9 is a flow chart of a method of data communication according to yet another embodiment of the present invention;

fig. 10 is a schematic diagram of a method for data communication according to another embodiment of the present invention;

FIG. 11 is a schematic diagram of a method of data communication according to yet another embodiment of the present invention;

fig. 12 is a schematic diagram of a method of data communication according to another embodiment of the present invention;

FIG. 13 is a diagram illustrating an apparatus for data communication according to an embodiment of the present invention;

FIG. 14 is a schematic diagram of a data communication apparatus according to another embodiment of the present invention;

FIG. 15 is a schematic diagram of a data communication apparatus according to yet another embodiment of the present invention;

FIG. 16 is a schematic diagram of a data communication device according to another embodiment of the present invention;

fig. 17 is a system diagram of data communication according to another embodiment of the present invention.

Detailed Description

The embodiment of the invention provides a method, a device and a system for data communication, which can interrupt the call of a sending terminal and release channel resources, and have strong flexibility and high efficiency.

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The data communication method provided by the embodiment of the invention can be applied to a distributed cluster system without a control center, such as an XPT system. Referring to fig. 1, a schematic view of an application scenario of the data communication method according to the embodiment of the present invention is shown. The method of data communication described above will be described with reference to fig. 1 to 12. As shown in fig. 1, there are 3 channels in a two-carrier XPT system: site channel 1(BS CH1), site channel 2(BS CH2), site channel 3(BS CH3) are occupied, and only site channel 4(BS CH 4) is free. Wherein, the BS CH1 and the BS CH2 are different time slots of the first carrier frequency; BS CH3 and BS CH4 are different time slots of the second carrier frequency. Wherein, the BS CH1 is occupied by the terminal A calling the terminal E (A Call E); BS CH2 is occupied by terminal C group Call group 1(C Call G1); BS CH3 is occupied by terminal D group Call group 2(D Call G2). Wherein Hdr represents a voice head, and VA, VB, VC, VD, VE and VF represent voice A, voice B, voice C, voice D, voice E and voice F. Term is the end of speech frame. Terminal B (msb) is a group member of G1, is receiving the group call initiated by terminal C, and, assuming that terminal B is the first terminal, wants to interrupt the call of terminal C so that terminal B initiates the group call of G1 so that the members of G1, including C, all hear their own calls. The method of the present invention will be described below by taking this application scenario as an example.

Referring to fig. 2, a flowchart of a method for data communication according to an embodiment of the present invention is applied to a terminal, where the method may include:

s201, determining an idle channel, and sending a data handshake request carrying interrupt information on the idle channel; the interruption information comprises at least an indication to interrupt a call of a traffic channel.

In a distributed trunking communication system without a control center, if a first terminal in the system needs to interrupt a call of a sending terminal, so that the sending terminal releases occupied traffic channel resources, and the first terminal can initiate a call by using the released traffic channel resources, an idle channel can be determined, and a data handshake request carrying interrupt information is sent on the idle channel. For example, if a first terminal in the system is receiving a call from a second terminal, and if a transmitting terminal, that is, the second terminal occupies a channel for a long time, and if the first terminal receiving the call wants to interrupt the speech of the transmitting terminal and initiates a call on the interrupted channel, a data handshake request carrying interrupt information may be sent using any idle channel in the system. For another example, when all channel resources are occupied, if a terminal wants to initiate an alarm, a data handshake request including interrupt information may be initiated by using an idle channel in the system to interrupt a call of a sending terminal.

In some embodiments, the manner of determining the idle channel may be: and determining the preset special interrupt channel as a free channel. In specific implementation, a dedicated logical channel is reserved for interrupt use in the write frequency configuration, that is, the preset dedicated interrupt channel is used for interrupt use and cannot be used as a traffic channel. In this implementation, the terminal initiates a data handshake request carrying the interrupt information, which can only jump to a dedicated logical channel to send, and after receiving a data handshake response, jumps to a service channel of the interrupt call to wait for a channel release and then initiates a call using the service channel. Because a special logic channel is reserved as a special interrupt channel, the success rate of the terminal for interrupting the call of the sending terminal is higher, the reliability is strong, and the efficiency is high. It should be noted that, for different carrier frequencies, only one logical channel needs to be reserved, and it is not necessary to reserve one logical channel for each carrier frequency. And compared with the mode that each carrier frequency reserves a logic channel resource for interrupting the call, the method saves the channel resource. In addition, the embodiment of the invention can support the interrupted call between the terminals with the same carrier frequency and can also support the interrupted call between the terminals with cross carrier frequencies.

In other embodiments, any idle channel within the system may be used as an interrupt. This method is suitable for not only the interrupted call of the terminal in a single station, but also the interrupted call of the terminal in a plurality of stations. In particular, in cross-site call interruption, this approach may also increase system traffic channel utilization and reduce system bandwidth requirements.

In one possible implementation, determining the idle channel may include: and when the co-station call is determined to be received, determining the same-frequency idle channel of the traffic channel for receiving the call as an idle channel.

In another possible implementation, determining the idle channel may include: and determining the free channel of the free transfer platform broadcasted by the system as the free channel.

In another possible implementation, determining the idle channel may include: when it is determined that the cross-station call is received, determining a channel on which the cross-station call is received as an idle channel.

For example, if a dedicated interrupt channel is preset for the write frequency, the terminal that enables the interrupt call function needs to jump to the dedicated interrupt channel to initiate a data handshake request carrying interrupt information. This way is more reliable.

For example, if the dedicated interrupt channel is not configured for the write frequency, the idle channel in the terminal selection station that enables the interrupt call function initiates a data handshake request carrying interrupt information. This approach is more flexible than the approach of writing a frequency preset dedicated interrupt channel. When determining the idle channel in the system, the terminal can preferentially select the same-frequency idle channel (another idle time slot) for receiving the call to send a data handshake request carrying the interrupt information, thereby improving the system access performance of the interrupt call. And if the other time slot of the terminal receiving the call is busy, the terminal switches to the free time slot of the free transfer platform of the system broadcast to send a data handshake request carrying the interrupt information.

It should be noted that the embodiment of the present invention may also support cross-site dropped calls. For example, when the terminal receives a voice call from another station at the staying station, the terminal can directly initiate a callback interruption at a channel on which the staying station receives the call. In specific implementation, 1 bit may be added to the embedded voice link control frame LC of the air interface to identify that the call is a cross-site call. When the terminal analyzes that the call is a cross-site call and initiates cross-site callback interruption, because the channel uplink is idle, a cross-site data handshake request carrying interruption information can be directly initiated on a channel for receiving the call.

After determining the idle channel, the first terminal may send a data handshake request carrying the interrupt information on the idle channel. Wherein the interruption information comprises at least an indication to interrupt a call of a traffic channel.

As shown in fig. 3, a format diagram of a Data Handshake Request (Handshake Request) frame Protocol Data Unit (hereinafter, referred to as Protocol Data Unit, abbreviated as PDU) carrying interrupt information is shown. As shown in fig. 4, a PDU format diagram of a data Handshake Response (Handshake Response) is shown.

Referring to table 1, a table is defined for PDU information elements of data handshake requests and data handshake responses.

TABLE 1 data handshake information content description

The system selects a transfer platform comprising an idle time slot from an idle transfer platform list as a Free transfer platform.

And S202, receiving data handshake response sent by the transfer platform.

Referring to fig. 4, a schematic diagram of a format of a data handshake response PDU sent by the relay station.

S203, when the type of the data handshake response is the data handshake response allowing interruption, jumping to a service channel appointed by the relay according to a jump channel indication contained in the data handshake response.

S204, when the second terminal occupying the service channel for calling is determined to interrupt the calling and release the resource of the service channel, the calling is initiated on the service channel.

Wherein the determining that the second terminal occupying the traffic channel for calling interrupts the call and releases the resource of the traffic channel includes:

when a voice ending frame sent by a second terminal is detected on the service channel, determining that the second terminal occupying the service channel for calling interrupts calling and releases the resources of the service channel; wherein, the voice ending frame is used for indicating the second terminal to interrupt the call and release the resource of the service channel; alternatively, the first and second electrodes may be,

when a handshake end frame broadcasted by the relay station is detected on the service channel, determining that a second terminal occupying the service channel for calling interrupts calling and releases resources of the service channel; the handshake end frame is used to indicate that the relay station maintains a traffic channel for the first terminal after the second terminal releases the resources of the traffic channel.

The description will be made by taking fig. 1 as an example. In fig. 1, Hdr is a speech header, and VA, VB, VC, VD, VE, VF represent speech a, speech B, speech C, speech D, speech E, speech F. Term is the end of speech frame. The handsake _ Term is a Handshake end frame. The Handshake _ Req is a data Handshake request, and the Handshake _ Rsp is a data Handshake response. When a terminal B (MS B) receives a group call and presses PTT to want to initiate a call-back interruption at CH2, the terminal B (MS B) needs to jump to an idle channel CH4 in a site or a dedicated interruption channel preset by a write frequency to initiate a data handshake request carrying interruption information. As shown in fig. 1, the first downward arrow of MS B indicates that terminal B jumps From channel 2to idle channel 4 to send a data Handshake request (Handshake _ Req) carrying interrupt information, i.e. MS BJump From CH 2to CH4and TX Handshake _ Req interrupt information. As shown in fig. 1, it appears at BS CH4 that MS B sends a handover _ Req, data Handshake request. As shown in fig. 1, the arrow from BS CH4 to BS CH1 indicates sending an indication to Interrupt the CH2Call, embedding RC commands (i.e., TX Interrupt CH2Call, Embed RCinfo on next slot frame (CH1)) in the adjacent slot CH 1. The MSB then waits for the interrupt-enabled relay station response to signal it to jump to the traffic channel CH2 on which the call is going. As shown in FIG. 1, the second downward arrow of MS B indicates that After detecting the Handshake response, it jumps to channel CH2(After Handshake _ rsps checked, jump to TI _ CH: 2). MS B initiates a callback (B call Back G1) by detecting either a voice Term (also known as end of speech frame) or a Handshake response end frame (Handshake Term) of the traffic channel CH 2. Namely as shown in fig. 1: after check Termon TI-CH: 2, begin to call back G1. In the figure, RX represents reception and TX represents transmission. Where B calls G1 in order for all people including C to receive their own calls). After detecting a data handshake request carrying interrupt information of the MS B, the relay station embeds an RC command (Embed rcperiodic) in the adjacent channel CH1 of CH2 for a short period.

In some embodiments, after determining an idle channel and sending a data handshake request carrying interrupt information on the idle channel, if a data handshake response sent by a relay station is received, the first terminal waits when the type of the data handshake response is a data handshake waiting response. When the relay station determines that a second terminal occupying the service channel for calling interrupts the call and releases the resource of the service channel, a data handshake response allowing the interruption is sent to the first terminal, and at the moment, the first terminal jumps to the service channel appointed by the relay station according to a jump channel indication contained in the data handshake response and initiates the call. In this implementation manner, after determining an idle channel and sending a data handshake request carrying interrupt information on the idle channel, when determining that a data handshake response sent by the relay station is a data handshake waiting response, the first terminal waits on the idle channel; when the first terminal receives a data handshake response which is sent by a relay station and allows interruption, the second terminal which occupies the service channel to call is determined to interrupt the call, the resource of the service channel is released, the second terminal jumps to the service channel and initiates the call on the service channel.

In some embodiments, if the first terminal initiates a call on the traffic channel, the method may further include: when the indication of the call interruption is detected in the adjacent channel of the service channel for initiating the call, the voice ending frame is sent to interrupt the call and release the resources of the service channel. The interrupt call indication may specifically be a reverse channel RC command. Of course, the call interruption indication may also be other signaling as long as it can indicate the second terminal staying on the traffic channel of the determined call interruption to interrupt the call and release the resource of the traffic channel.

In this embodiment, when a terminal in the system is receiving a call, if the transmitting terminal occupies the channel for a long time, the receiving terminal wants to interrupt the speech of the transmitting terminal, and initiates a call on the channel interrupting the call, it will use any idle channel in the system to first send a data handshake request carrying interrupt information, wait for a data handshake response allowing the interrupt, then switch to the traffic channel in progress of the call notified by the relay station, and initiate a subsequent call by detecting the release of the traffic channel. In the embodiment, the call of the sending equipment is interrupted by the terminal by using the current system resource in the distributed cluster communication system without the control center, and the waste of channel resources is reduced. In addition, the interrupt request and the handshake request are combined, so that the air interface overhead is saved, and the advantages of integrating the interruption of the call and the reduction of call collision are achieved.

Referring to fig. 5, a flowchart of a method for data communication according to an embodiment of the present invention is applied to a relay station, where the method may include:

s501, a data handshake request which is sent by the first terminal and carries the interrupt information is detected.

Wherein the interruption information comprises at least an indication to interrupt a call of a traffic channel.

In a specific implementation, the relay station detects a data handshake request frame carrying interrupt information on any idle channel or a dedicated interrupt channel preset in write frequency, that is, analyzes the call handshake request, and may include, for example, analyzing a handshake type, an indication of interrupting a call of a traffic channel, address information, and the like.

S502, determining the service channel of the interrupted call according to the call indication of the interrupted service channel.

As shown in fig. 3 and table 1, an indication (Interrupt signaled Channel) to Interrupt a call of a traffic Channel may be included in the data handshake request. If the value in the indication of interrupting the call of the service channel is determined not to be zero, determining the service channel for interrupting the call according to the value in the indication of interrupting the call of the service channel; when the value in the indication of the call of the interrupted service channel is zero and the transfer call corresponding to the destination address information is determined to exist according to the destination address information carried in the data handshake request, determining the service channel corresponding to the transfer call as the service channel of the interrupted call; and when the value in the indication of the call of the interrupted service channel is zero and the transfer call corresponding to the destination address information does not exist according to the destination address information carried in the data handshake request, determining the service channel corresponding to the call with the lower priority as the service channel of the interrupted call according to the preset call priority.

For example, if the value filled in the instruction to interrupt the call of the traffic channel is not 0, the relay station interrupts the channel designated by the terminal. If the value of the padding in the instruction to interrupt the call of the traffic channel is 0, the relay station determines which traffic channel is to be interrupted. The relay station can check whether the same call is being transferred by analyzing the address information, and if so, the relay station interrupts the same call being transferred. If the call is not the same call, the call is an emergency call, and the relay station can interrupt the call with low priority in the site according to the priority of the individual call-group call- > full call- > emergency call from low to high.

S503, sending a data handshake response to the first terminal, where the data handshake response includes a data handshake response type and a hop channel indication.

Wherein, the jump channel indication is used to indicate the first terminal to jump to a service channel specified by the relay station, and the specified service channel is the same as the service channel for determining the interrupted call.

In the specific implementation, the relay station replies a terminal data handshake response first while preparing an interrupt channel, and fills a skipped channel and a data handshake response type, so that the terminal knows which channel can be interrupted to initiate its subsequent call. Meanwhile, the relay station controls to embed an interrupt call indication in downlink air interface data of an adjacent channel of the interrupt service channel, so that the transmitting terminal detects the embedded interrupt call indication of the adjacent time slot, can stop the call of the transmitting terminal and release channel resources.

For convenience of description, the following embodiment will be described by taking the interrupt call indication as RC signaling as an example. Of course, the indication of the interrupted call may also be other signaling, such as customized interrupted call signaling.

S504, embedding a call interruption indication in the adjacent channel of the service channel for determining the call interruption, for indicating the second terminal staying on the service channel for determining the call interruption to interrupt the call and release the resource of the service channel.

As shown in fig. 1, after the idle CH4 detects a data handshake request carrying interrupt information, the relay station replies a terminal data handshake response, and at the same time, controls to embed an interrupt call indication, such as RC signaling, in the middle of F frames of a voice superframe broadcast on the downlink air interface in an adjacent channel CH1 of an interrupt channel CH 2.

In some embodiments, said embedding a dropped call indication in an adjacent channel of said traffic channel for which a dropped call is determined comprises: when it is determined that a Data frame (Data) is broadcast by an adjacent channel of the traffic channel of the interrupted call, replacing a synchronization pattern of the Data frame with the interrupted call indication. Further, the replacing the synchronization pattern of the data frame with the interrupt call indication specifically includes: and embedding an interrupt call indication every other synchronous, and stopping embedding the interrupt call indication when the number of times of embedding the interrupt call indication is greater than the preset number of times.

In some embodiments, said embedding a dropped call indication in an adjacent channel of said traffic channel for which a dropped call is determined comprises: embedding the interrupt call indication in an F frame of the voice superframe when it is determined that the voice superframe is broadcast by an adjacent channel of the traffic channel of the interrupt call.

Taking an interrupt call indication as an RC instruction for illustration, the relay station detects a Data handshake request frame carrying interrupt information on an idle channel or a preset dedicated interrupt channel, determines which service channel to detach, directly replaces the 1 st Data frame synchronization pattern to be forwarded with an embedded RC signaling if the Data frame (Data) is broadcasted in an adjacent time slot of the interrupt service channel, then re-embeds the RC every 2 frame Data frames, replaces the 3 rd frame Data frame synchronization pattern with the embedded RC signaling, and embeds the RC signaling for 3 times continuously, thereby ensuring that the transmitting terminal can detect the RC signaling in the adjacent time slot. Wherein the period of the embedded RC is 120 ms. Fig. 6 is a schematic diagram illustrating RC signaling embedded in a data frame.

For example, if the broadcast of the adjacent time slot of the interrupted traffic channel is not encrypted voice frame (A, B, C, D, E, F), embedding RC in the F frame position of the downstream forwarding voice superframe, switching the 32-bit signaling in the middle of the voice F to be embedded RC, embedding RC in the F frame of the next voice superframe again, and embedding RC signaling for 3 times continuously, wherein the RC interval period for two times continuously is 360 ms. If the adjacent time slot of the interrupted traffic channel broadcasts the encrypted voice frame (A, B, C, D, E, F), only the RC can be embedded in the F frame position of the voice superframe, the superframe (A, B, C, D, E, F) of the encrypted information can not be embedded, so the interval period of the RC for two consecutive times of the encrypted voice is 720 ms. Fig. 7 is a schematic diagram illustrating RC signaling embedded in a voice frame.

In some embodiments, the data handshake request received by the relay station further includes a handshake category, the method further comprising: and analyzing the data handshake request, and when the handshake type of the data handshake request is an interrupt request carrying a service, maintaining a service channel for the first terminal. During specific implementation, if the Handshake type (Handshake kidd) is 1, it is indicated that the interruption is an interruption Handshake of a service, the terminal continues subsequent service transmission after interrupting a channel, and the relay station needs to maintain the channel for the interruption party when not receiving new uplink information after interrupting the channel; if the handshake type is 2, the interruption is a remote control release channel, the terminal only releases the channel, no subsequent service needs to be sent, and the channel does not need to be maintained for the interruption party after the relay station interrupts the channel.

In some embodiments, said maintaining a traffic channel for said first terminal comprises: when a voice end frame sent by the second terminal is detected on a service channel for determining call interruption, controlling the service channel to be switched from a service forwarding state to a handshake holding state, and transmitting the handshake end frame on the service channel by the transfer platform; wherein, the voice ending frame is used for indicating the second terminal to interrupt the call and release the resource of the traffic channel. The handshake end frame is used to indicate that the relay station maintains a traffic channel for the first terminal after the second terminal releases the resources of the traffic channel. For example, the relay station maintains the traffic channel for the first terminal by sending a handshake response end frame for a period of time, which may be 360 ms.

For example, as shown in fig. 8, a schematic diagram of a method for maintaining a channel for an interrupt terminal is shown for the relay station. The relay station judges that the handshake type carried in the handshake request is 1, and the relay station is an interrupt handshake carrying service, and needs to maintain a channel for the interrupt party after the channel is released. After the relay station detects a voice end frame Term sent by an interrupted party MS C at an empty port in a service channel CH2 of an interrupted call, the system needs to control the service channel CH2 of the interrupted call to be switched from a forwarding service state (Repeating) to a Handshake holding stage (Handshake hold time), a holding channel (Keep CH For MSB) is provided For an interrupted party terminal B (MS B), and uplink frames of other terminals are detected during the holding channel and are directly discarded without processing. It should be noted that, for the english term appearing in fig. 8, please refer to the chinese explanation of the english term appearing in fig. 1 to fig. 7, and the same english term represents the same meaning of the chinese.

In some embodiments, when determining that a data handshake request carrying interruption information is a cross-site data handshake request, a relay station sends the cross-site data handshake request to a source site corresponding to the data handshake request carrying the interruption information; the sending of the data handshake response to the first terminal includes: receiving a data handshake response sent by the source station; when the data handshake response is a response allowing interruption, sending the data handshake response to the first terminal, wherein the type of the data handshake response is allowing interruption; and when the data handshake response is a response of rejecting interruption, sending the data handshake response to the first terminal, wherein the type of the data handshake response is rejecting interruption. Specific implementations can be implemented with reference to the methods of fig. 11 and 12.

Referring to fig. 9, a flowchart of a method for data communication according to another embodiment of the present invention is provided, where the method may include:

s901, a first terminal determines an idle channel and sends a data handshake request carrying interrupt information on the idle channel.

And S902, the transfer platform detects the data handshake request.

And S903, the transfer platform sends a data handshake response.

And S904, the relay station sends an RC instruction.

S905, the first terminal detects the handshake response and jumps to the interrupted traffic channel.

And S906, the second terminal detects the RC instruction.

The second terminal is the interrupted party and also the transmitting party, and the transmitting terminal detects whether there is an RC in the adjacent channel CH1 every time it transmits a frame of voice while transmitting voice at CH 2. When RC is detected, the resolution according to table 2 is a stop transmission request (0101), which can only be stopped if the interrupted party enables the call function to be interrupted. If the stop transmission command (0100) is resolved, the terminal must stop transmitting itself regardless of whether the interrupted call function is enabled or not. In this implementation, the stop transmission command is usually initiated by the control of the dispatching desk, and the dispatching desk decides which call to interrupt and informs the relay desk of filling the RC command as the stop transmission command.

TABLE 2 RC information

And S907, the second terminal sends the current voice frame, then sends a voice ending frame and releases the channel.

S908, the first terminal detects the voice end frame and initiates a call on the interrupted traffic channel.

Referring to fig. 10, a method for data communication according to another embodiment of the present invention is shown. In this embodiment, the details of initiating handshake interruption by a terminal under a single station preferentially selecting an idle channel with the same frequency are described. The XPT system of 2 carrier frequencies shown in fig. 10 has 4 channels CH 1-CH 4, where CH2 and CH3 are forwarding call traffic, where BS CH2 is occupied by traffic of terminal C call group 1(C call G1), BS CH3 is occupied by traffic of terminal D call group 2(D call G2), and BSCH1 and BS CH4 are in Idle (Idle CH) state. It should be noted that, for the english term appearing in fig. 10, please refer to the chinese explanation of the english term appearing in fig. 1 to fig. 9, and the same english term represents the same meaning of the chinese.

When the interrupting party terminal MS B is receiving its own voice call on the traffic channel CH2, the interrupting party MS B presses PTT (Push To Talk, Chinese name is Push button Talk) To initiate a callback To interrupt the transmission of the transmitting terminal MSC, and initiates a voice call, so that all group call G1 members including MS C can receive the call. MS B detects that another slot to receive the call is idle, i.e.: an idle channel is available at the same frequency, an interrupting party MS B sends a data Handshake request Handshake _ Req carrying interrupting information by using an idle channel CH1 at the same frequency, waits for a transfer platform to respond to the Handshake _ Rsp to inform the switching to a CH2, and switches to a CH 2to initiate a callback after detecting channel release (recognizing the channel release by receiving a voice end frame Term and a Handshake end frame (Handshaketerm)) at the CH 2.

The relay station receives a data Handshake request Handshake _ Req carrying interruption information on a service channel CH1, forwards a data Handshake response Handshake _ Rsp for a period of time (360 ms in the figure) in the next 60ms, and simultaneously judges that the interrupted service channel is CH2, so that reverse channel signaling RC is embedded in a data frame broadcast by a CH1 air interface every 120ms, and the aim is to interrupt the call of CH 2.

When the interrupted terminal MSC transmits voice in CH2, it receives reverse channel signaling RC to detect if there is broadcast in the same frequency adjacent time slot CH1, if it detects the reverse channel signaling RC and judges that it is to stop transmitting command, MS C sends out the current voice frame, then sends a voice end frame Term to end transmitting, and releases the channel.

Referring to fig. 11, a schematic diagram of a data communication method according to another embodiment of the present invention is provided.

The scheme of the invention can be used for single-station interrupt calling and also suitable for multi-station interrupt calling. The embodiment shown in fig. 11 is described by taking the cross-site callback interruption in the multi-site system as an example.

As shown in fig. 11, terminal MS a initiates a group Call at site 3 (terminal a calls group 1, i.e., a Call G1). Terminal MS B stays at site 1 and receives the group Call (a Call G1) on channel 1(CH 1). Terminal MS C stays at site 2 and receives the group Call (a Call G1) on channel 2(CH 2). The following description will take an example of a situation where two terminals MS B and MS C in different sites receive a cross-site call and initiate an interrupt handshake at the same time.

As shown in fig. 11, when MS B at site 1 receives a cross-site group call at CH1 of the staying site, recognizes that the call is a cross-site call, channel CH1 which selects to receive the call initiates a data handshake request carrying interruption information, which is intended to interrupt the call of G1. Meanwhile, the MS C of the station 2 initiates a data handshake request carrying the interrupt information using the receiving call channel CH2 in the station 2.

It should be noted that, when the terminal receives a voice call from another station at the staying station, the terminal can directly initiate a callback interruption at a channel where the staying station receives the call. Since the channel uplink is idle. In specific implementation, 1 bit may be added to the embedded voice link control frame LC of the air interface to identify that the call is a cross-site call. When the terminal analyzes that the call is a cross-site call and initiates cross-site callback interruption, a cross-site handshake request carrying interruption information can be directly initiated on a channel for receiving the call.

The relay station of site 1 or site 2 detects a data handshake request carrying interrupt information, and sends only a cross-site request to the source site 3 initiating group call G1, and simultaneously sends a cross-site handshake wait (data handshake response type is 4) in the downlink of the relay station receiving the request. The source station 3 judges which data handshake request carrying the interrupt information is processed, the general rule is that the data handshake request is processed first, if the source station 3 receives the cross-station handshake of the MS B first, the replying station 1 allows the B to interrupt the call, and then receives the cross-station handshake request of the MS C, and the replying station 2 refuses the C to interrupt the call.

The relay station of the station 1 receives the response information allowing the B to interrupt the call, and sends a data handshake response (the type of the data handshake response is 0) allowing the B to interrupt the call over the air interface, and the MS B receives the data handshake response allowing the B to interrupt the call, waits for the a to release the channel in the traffic channel of the a call g 1.

The relay station of the station 2 receives the response of rejecting the C interrupted call, and sends the data handshake response (the type of the data handshake response is 5) of rejecting the interruption at the air interface, and the MS C receives the ongoing data handshake response of rejecting the interruption of the same call and informs the user of prompting the 'failure of the interrupted call'.

The relay station reserves a channel for the terminal which has successfully interrupted the call, and avoids the channel from being preempted.

As shown in fig. 12, after the relay station of the source station receives the handshake request across the stations, it needs to notify that the RC is embedded in the adjacent channel (CH2) of the interrupt traffic channel (CH1) in order to interrupt the group call of CH1, and the source station needs to record which terminal (MSB) -initiated interrupt request is allowed.

When the source station detects a voice Term frame in an interrupted traffic channel (CH1), the state of CH1 is switched from playing to handshake handoff, and the downlink air interface of CH1 is controlled to start forwarding handshake Term (source address fills in MSB, destination address fills in G1) in order to reserve a channel for MSB.

The MSB waits for CH1 to release the channel. If the MSB detects an end of speech frame Voice Term or a Handshake end frame Handshake Term, indicating that CH1 has been released, the MSB initiates speech directly on CH 1.

In some embodiments, if a manager in the system finds that a channel occupied by a terminal for a long time does not release channel resources, the manager may control, through a programmable key, an idle relay station or a dedicated interrupt channel preset for write frequency in the system to send a data handshake request (the handshake type needs to be set to 2) carrying interrupt information, so as to release the channel occupied for a long time. The relay station embeds reverse channel signaling into the adjacent channel occupying the channel to make the interrupted party (transmitting terminal) stop transmitting and release the channel. In this application scenario, the relay station does not need to maintain the Channel after detecting the voice Term, and directly switches from the relay service reporting state to the Channel Idle state (Channel Idle).

In some embodiments, the terminal may initiate an alert service. The application of the alerting service interrupt call is described below by taking the case of a write frequency configuration reserved dedicated interrupt channel as an example. The terminal sends the alarm service and initiates a data handshake request carrying the interrupt information on a special interrupt channel, the relay station decides which path of the voice service is transmitting to be interrupted or the call hold stage call hand time is relayed, and then the terminal is informed to switch to the service channel interrupting the call to carry out the subsequent alarm service.

In some embodiments, the dispatcher can directly issue a violent interruption instruction (RC is 0100 in table 2) to interrupt the designated traffic channel. After receiving the violent interruption instruction, the relay station inserts RC in the downlink of the adjacent channel of the service channel of the appointed interrupted call to inform the terminal to automatically release the channel. When all channels in the station are busy, only the dispatching desk can control to issue a violent interruption instruction to release the channels. Besides, the dispatching desk can also support to issue a request (0101) instruction for stopping transmission, and the second terminal can stop transmission only if the call function can be interrupted. If the second terminal detects that the stop transmission request instruction is transmitted but the interrupted call function is not enabled, its transmission will not be affected.

In the method for data communication provided by the invention, the terminal can firstly send a data handshake request carrying the interrupt information on any idle channel in the system, wait for the data handshake response allowing the interrupt, then switch to the service channel which is notified by the relay station and is calling, and then initiate the subsequent call after detecting the release of the service channel. Any idle channel in the system comprises a system-allocated idle channel and a dedicated interrupt channel with preset write frequency. When the terminal selects the idle channel allocated by the system to initiate a data handshake request, the terminal preferentially uses the staying same-frequency idle channel to initiate handshake interruption, so that the system access performance of the interrupted call can be improved.

In the method for data communication provided by the invention, any idle relay station in the system detects a data handshake request carrying interrupt information, interrupts a service channel in calling, and informs a terminal to switch to the service channel which interrupts the calling for subsequent calling. The relay station interrupts the service channel, firstly interrupts the same call, and then preferentially interrupts the service channel with low priority according to the call priority. In addition, the relay station can flexibly adjust the embedding rule of the reverse channel signaling according to the type of the air interface frame forwarded by the service channel, and the system access performance of the interrupted call is improved.

In the data communication method provided by the invention, an interrupt call function of a cross-station call is also supported. The cross-site call interruption can initiate handshake interruption on a channel for receiving the call, thereby improving the effective utilization of channel resources.

In summary, the embodiment of the invention can achieve the following beneficial effects:

1. the handshaking and the call interruption are combined, a more effective distributed cluster system interruption scheme is provided, and the purpose of call interruption is achieved by using less channel resources.

2. The cross-site call interruption can initiate handshake interruption on a channel for receiving the call, and the purpose of interrupting the call can be achieved without wasting idle channel resources.

3. The system maintains the channel for the interruption of the carried service, which can reduce the call collision in the system and ensure that the interruption of the call by a plurality of terminals is only allowed to be successful.

4. And flexibly adjusting the embedding rule of the reverse channel signaling according to the type of the air interface frame, and improving the system access performance of the interrupted call.

The following describes a device corresponding to the method provided by the embodiment of the present invention.

Referring to fig. 13, a schematic diagram of a data communication apparatus according to an embodiment of the present invention is provided. The apparatus may include:

a sending unit 1301, configured to determine an idle channel, and send a data handshake request carrying interrupt information on the idle channel; the interruption information comprises at least an indication to interrupt a call of a traffic channel;

a receiving unit 1302, configured to receive a data handshake response sent by the relay station;

a skipping unit 1303, configured to skip to a service channel specified by the relay station according to a skipping channel indication included in the data handshake response when the type of the data handshake response is a data handshake response allowing interruption;

a calling unit 1304, configured to initiate a call on the traffic channel when it is determined that the second terminal occupying the traffic channel for making a call interrupts the call and releases the resource of the traffic channel.

Further, the calling unit is specifically configured to determine, when a voice end frame sent by a second terminal is detected on the traffic channel, that the second terminal occupying the traffic channel for calling interrupts the call and releases a resource of the traffic channel; wherein, the voice ending frame is used for indicating the second terminal to interrupt the call and release the resource of the service channel; or, when detecting the handshake end frame broadcasted by the relay station on the service channel, determining that a second terminal occupying the service channel for calling interrupts the call and releases the resource of the service channel; the handshake end frame is used to indicate that the relay station maintains a traffic channel for the first terminal after the second terminal releases the resources of the traffic channel.

Further, the sending unit is specifically configured to: determining a preset special interrupt channel as an idle channel; or, when the co-station call is determined to be received, determining the same-frequency idle channel of the service channel for receiving the call as an idle channel; or, determining an idle channel of a free transfer platform broadcasted by the system as an idle channel; or, when the cross-station call is determined to be received, determining a channel for receiving the cross-station call as an idle channel.

Further, the apparatus further comprises:

and the releasing unit is used for sending a voice ending frame to interrupt the call and release the resources of the service channel when the call interruption indication is detected in the adjacent channel of the service channel for initiating the call.

Referring to fig. 14, a block diagram of a data communication apparatus according to another embodiment of the present invention is shown. The method comprises the following steps: at least one processor 1401 (e.g. a CPU), a memory 1402, a receiver 1403, a transmitter 1404 and at least one communication bus 1405 for enabling connectivity communication between these devices. The processor 1401 is used to execute executable modules, such as computer programs, stored in the memory 1402. Memory 1402 may include a Random Access Memory (RAM) and may also include a non-volatile Memory, such as at least one disk Memory. One or more programs are stored in the memory and configured to be executed by the one or more processors 1401 include instructions for:

receiving data handshake response sent by the transfer platform;

In some embodiments, processor 1401, in particular for executing the one or more programs, includes instructions for:

when a voice end frame sent by a second terminal or a handshake end frame broadcasted by the transfer platform is detected on the service channel, initiating a call on the service channel; wherein, the voice ending frame is used for indicating the second terminal to interrupt the call and release the resource of the service channel; the handshake end frame is used to indicate that the relay station maintains a traffic channel for the first terminal after the second terminal releases the resources of the traffic channel.

determining a preset special interrupt channel as an idle channel; alternatively, the first and second electrodes may be,

when the co-station call is determined to be received, determining a same-frequency idle channel of a service channel for receiving the call as an idle channel; alternatively, the first and second electrodes may be,

determining an idle channel of a free transfer platform broadcasted by a system as an idle channel; alternatively, the first and second electrodes may be,

when it is determined that the cross-station call is received, determining a channel on which the cross-station call is received as an idle channel.

when the indication of the call interruption is detected in the adjacent channel of the service channel for initiating the call, the voice ending frame is sent to interrupt the call and release the resources of the service channel.

Referring to fig. 15, a schematic diagram of a data communication apparatus according to an embodiment of the present invention is provided. The apparatus may include:

a detecting unit 1501, configured to detect a data handshake request that carries interrupt information and is sent by a first terminal; the interruption information comprises at least an indication to interrupt a call of a traffic channel;

a determining unit 1502, configured to determine a traffic channel for interrupting the call according to the indication of the call for interrupting the traffic channel;

a first sending unit 1503, configured to send a data handshake response to the first terminal, where the data handshake response includes a data handshake response type and a hopping channel indication; the jump channel indication is used for indicating the first terminal to jump to a service channel appointed by the relay station, and the appointed service channel is the same as the service channel for determining the interrupted call;

a second sending unit 1504, configured to embed a dropped call indication in an adjacent channel of the traffic channel for which the dropped call is determined, and to instruct the second terminal staying in the traffic channel for which the dropped call is determined to drop the call and release resources of the traffic channel.

Further, the determining unit is specifically configured to:

when the value in the indication of interrupting the call of the service channel is not zero, determining the service channel for interrupting the call according to the value in the indication of interrupting the call of the service channel;

when the value in the indication of the call of the interrupted service channel is zero and the transfer call corresponding to the destination address information is determined to exist according to the destination address information carried in the data handshake request, determining the service channel corresponding to the transfer call as the service channel of the interrupted call;

and when the value in the indication of the call of the interrupted service channel is zero and the transfer call corresponding to the destination address information does not exist according to the destination address information carried in the data handshake request, determining the service channel corresponding to the call with the lower priority as the service channel of the interrupted call according to the preset call priority.

Further, the second sending unit is specifically configured to:

when the adjacent channel of the service channel of the interrupted call is determined to broadcast a data frame, replacing the synchronous pattern of the data frame with the interrupted call indication;

embedding the interrupted call indication in a voice superframe when it is determined that the voice superframe is broadcast by an adjacent channel of a traffic channel of the interrupted call.

Further, the apparatus further comprises:

and the maintaining unit is used for maintaining a service channel for the first terminal when the handshake type of the data handshake request is an interrupt request carrying a service.

Further, the holding unit is specifically configured to:

when a voice end frame sent by the second terminal is detected on a service channel for determining call interruption, controlling the service channel to be switched from a service forwarding state to a handshake holding state, and sending a handshake end frame on the service channel by the transfer platform; wherein, the voice ending frame is used for indicating the second terminal to interrupt the call and release the resource of the traffic channel. The handshake end frame is used to indicate that the relay station maintains a traffic channel for the first terminal after the second terminal releases the resources of the traffic channel. Further, the apparatus further comprises:

a third sending unit, configured to send, when it is determined that the data handshake request carrying the interrupt information is a cross-site data handshake request, the cross-site data handshake request to a source site corresponding to the data handshake request carrying the interrupt information;

the first sending unit is specifically configured to: receiving a data handshake response sent by the source station; when the data handshake response is a response allowing interruption, sending the data handshake response to the first terminal, wherein the type of the data handshake response is allowing interruption; and when the data handshake response is a response of rejecting interruption, sending the data handshake response to the first terminal, wherein the type of the data handshake response is rejecting interruption.

Referring to fig. 16, a block diagram of a data communication apparatus according to another embodiment of the present invention is shown. The method comprises the following steps: at least one processor 1601 (e.g., CPU), memory 1602, receiver 1603, transmitter 1604, and at least one communication bus 1605 for enabling connected communication between these devices. Processor 1601 is used to execute executable modules, such as computer programs, stored in memory 1602. The Memory 1602 may include a Random Access Memory (RAM) and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. One or more programs are stored in the memory and configured to be executed by the one or more processors 1601, including instructions for:

sending a data handshake response to the first terminal, wherein the data handshake response comprises a data handshake response type and a jump channel indication; the jump channel indication is used for indicating the first terminal to jump to a service channel appointed by the relay station, and the appointed service channel is the same as a service channel for determining an interrupted call;

In some embodiments, processor 1601 is specifically configured to execute the one or more programs including instructions for:

and analyzing the data handshake request, and when the handshake type of the data handshake request is an interrupt request carrying a service, maintaining a service channel for the first terminal.

when a voice end frame sent by the second terminal is detected on a service channel for determining call interruption, controlling the service channel to be switched from a service forwarding state to a handshake holding state, and sending a handshake end frame on the service channel by the transfer platform; wherein, the voice ending frame is used for indicating the second terminal to interrupt the call and release the resource of the service channel; the handshake end frame is used to indicate that the relay station maintains a traffic channel for the first terminal after the second terminal releases the resources of the traffic channel.

when the data handshake request carrying the interrupt information is determined to be a cross-site data handshake request, sending the cross-site data handshake request to a source site corresponding to the data handshake request carrying the interrupt information;

the sending of the data handshake response to the first terminal comprises:

receiving a data handshake response sent by the source station;

when the data handshake response is a response allowing interruption, sending the data handshake response to the first terminal, wherein the type of the data handshake response is allowing interruption;

and when the data handshake response is a response of rejecting interruption, sending the data handshake response to the first terminal, wherein the type of the data handshake response is rejecting interruption.

Referring to fig. 17, a system diagram for data communication according to another embodiment of the present invention is provided.

A system 1700 for data communication comprising a first terminal 1300, a relay station 1500, a second terminal 1800, wherein:

the first terminal 1300 is configured to: determining an idle channel, and sending a data handshake request carrying interrupt information on the idle channel; the interruption information comprises at least an indication to interrupt a call of a traffic channel; receiving data handshake response sent by the transfer platform; when the type of the data handshake response is the data handshake response allowing interruption, jumping to a service channel appointed by the relay according to a jumping channel indication contained in the data handshake response; when determining that a second terminal occupying the service channel for calling interrupts calling and releases the resources of the service channel, initiating the calling on the service channel;

the transfer table 1500 is configured to: detecting a data handshake request which is sent by a first terminal and carries interrupt information; the interruption information comprises at least an indication to interrupt a call of a traffic channel; determining a service channel for interrupting the call according to the indication for interrupting the call of the service channel; sending a data handshake response to the first terminal, wherein the data handshake response comprises a data handshake response type and a jump channel indication; the jump channel indication is used for indicating the first terminal to jump to a service channel appointed by the relay station, and the appointed service channel is the same as the service channel for determining the interrupted call; embedding a dropped call indication in a channel adjacent to the traffic channel of the determined dropped call, for indicating the second terminal staying in the traffic channel of the determined dropped call to drop the call, and releasing the resource of the traffic channel;

the second terminal 1800 is configured to: when the call interruption indication is detected in the adjacent channel of the service channel for initiating the call, sending a voice ending frame to interrupt the call and release the resource of the service channel.

Wherein, the implementation of the first terminal, the transit station, can refer to the implementation of the embodiments shown in fig. 13-16.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is only limited by the appended claims

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. The invention may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The invention may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the apparatus embodiment, since it is substantially similar to the method embodiment, it is relatively simple to describe, and reference may be made to some descriptions of the method embodiment for relevant points. The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort. The foregoing is directed to embodiments of the present invention, and it is understood that various modifications and improvements can be made by those skilled in the art without departing from the spirit of the invention.

Claims

1. A method of data communication, applied to a relay station, the method comprising:

embedding a dropped call indication in a channel adjacent to the traffic channel for determining the dropped call, wherein the dropped call indication is used for indicating a second terminal staying on the traffic channel for determining the dropped call to drop the call and release the resource of the traffic channel;

the determining the traffic channel of the interrupted call according to the indication of the interrupted call channel comprises:

2. The method of claim 1, wherein embedding a dropped call indication in a channel adjacent to the traffic channel for the determined dropped call comprises:

replacing a synchronization pattern of the data frame with the interrupt call indication when it is determined that the data frame is broadcast by an adjacent channel of the interrupted traffic channel;

embedding the interrupted call indication in a voice superframe when it is determined that the adjacent channel of the interrupted traffic channel broadcasts a voice superframe.

3. The method of claim 1, wherein the data handshake request further comprises a handshake category, the method further comprising:

and when the handshake type of the data handshake request is an interrupt request carrying a service, maintaining a service channel for the first terminal.

4. The method of claim 3, wherein maintaining the traffic channel for the first terminal comprises:

5. The method of claim 1, further comprising:

the sending of the data handshake response to the first terminal comprises:

receiving a data handshake response sent by the source station;

6. An apparatus for data communication, applied to a relay station, the apparatus comprising:

a second sending unit, configured to embed a dropped call indication in a channel adjacent to the traffic channel for the determined dropped call, and to indicate a second terminal staying in the traffic channel for the determined dropped call to drop the call and release resources of the traffic channel;

the determination unit includes:

a first determining subunit, configured to determine, when the value in the indication to interrupt the call of the traffic channel is not zero, the traffic channel to interrupt the call according to the value in the indication to interrupt the call of the traffic channel;

a second determining subunit, configured to determine, when a value in the indication of interrupting the call of the service channel is zero and it is determined that a relay call corresponding to the destination address information exists according to the destination address information carried in the data handshake request, the service channel corresponding to the relay call as the service channel of interrupting the call;

and a third determining subunit, configured to determine, when the value in the indication of the call of the interrupted traffic channel is zero and it is determined according to destination address information carried in the data handshake request that there is no relay call corresponding to the destination address information, a traffic channel corresponding to a call with a low priority as a traffic channel of the interrupted call according to a preset call priority.

7. An apparatus for data communication comprising a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs comprising instructions for:

embedding a call interruption indication in a channel adjacent to the traffic channel for determining the call interruption, wherein the call interruption indication is used for indicating a second terminal staying in the traffic channel for determining the call interruption to interrupt the call and release the resource of the traffic channel;

8. A system for data communication, comprising a first terminal, a relay station, and a second terminal, wherein:

the transfer table is used for: detecting a data handshake request which is sent by a first terminal and carries interrupt information; the interruption information comprises at least an indication to interrupt a call of a traffic channel; determining a service channel for interrupting the call according to the indication for interrupting the call of the service channel; sending a data handshake response to the first terminal, wherein the data handshake response comprises a data handshake response type and a jump channel indication; the jump channel indication is used for indicating the first terminal to jump to a service channel appointed by the relay station, and the appointed service channel is the same as the service channel for determining the interrupted call; embedding a call interruption indication in a channel adjacent to the traffic channel for determining the call interruption, wherein the call interruption indication is used for indicating a second terminal staying in the traffic channel for determining the call interruption to interrupt the call and release the resource of the traffic channel; the determining the traffic channel of the interrupted call according to the indication of the interrupted call channel comprises: when the value in the indication of interrupting the call of the service channel is not zero, determining the service channel for interrupting the call according to the value in the indication of interrupting the call of the service channel; when the value in the indication of the call of the interrupted service channel is zero and the transfer call corresponding to the destination address information is determined to exist according to the destination address information carried in the data handshake request, determining the service channel corresponding to the transfer call as the service channel of the interrupted call; when the value in the indication of the call of the interrupted service channel is zero and it is determined that there is no transfer call corresponding to the destination address information according to the destination address information carried in the data handshake request, determining a service channel corresponding to a call with a low priority as a service channel of the interrupted call according to a preset call priority;