CN103634878A - Communication method and communication terminal based on time-division multi-address communication system - Google Patents

Abstract

The embodiment of the present invention discloses a communication method and terminal based on a time division multiple access communication system, wherein the method includes: the communication terminal receives an embedded signaling frame, and analyzes the embedded information of the embedded signaling frame to obtain the embedded signaling and control information; the communication terminal caches the embedded signaling to the corresponding buffer area according to the control information; when each corresponding buffer area has cached the embedded signaling, the communication terminal caches the embedded signaling in all buffer areas The embedded signaling is decoded to obtain the control signaling. The technical scheme of the invention can shorten the terminal access time of the time division multiple access communication system and improve the access performance of the time division multiple access communication system.

Description

A communication method and terminal based on a time division multiple access communication system

technical field

The present invention relates to the technical field of communication, in particular to a communication method and terminal based on a time division multiple access communication system. the

Background technique

In order to meet the mobile communication needs of middle and low-end professional and commercial users in European countries, the European Telecommunications Standards Institute (ETSI) has developed an open standard Digital Mobile Radio (DMR) standard to apply to Public utilities, schools, hospitals, hotels, property and other industries. the

DMR voice is transmitted in a superframe structure, and each superframe is composed of 6 bursts, which are identified by letters A to F in turn, where: burst A indicates the beginning of the superframe, and the middle part of A transmits the synchronization word (SYNC), The intermediate transfers of bursts B to F embed signaling. The DMR voice establishment communication processing scheme is: first search for burst A, find burst A and synchronize to the air interface sequence, then start receiving B, C, D, E, F, and then analyze in turn to obtain the link control start/stop indication (Link Control Start/Stop, LCSS) are the four embedded signalings of "start-middle-middle-end", decode the four embedded signalings to obtain link control (Link Control, LC) signaling, and finally get the link control (LC) signaling according to the LC signal The protocol data unit (Protocol Data Unit, PDU) in order judges whether it is the call of this communication terminal. the

Similarly, the common announcement channel (Common Announcement Channel, CACH) establishes a communication processing scheme as follows: first, it must be determined that the CACH frame carrying the short embedded signaling carrying the LCSS identification as the beginning is received, and then successively receive the CACH frame carrying the LCSS identification as "intermediate-intermediate- The CACH frame of the short embedded signaling of "End" is decoded according to the four short embedded signalings to obtain the short LC signaling, and finally it is judged whether it is a call of the communication terminal according to the compressed address in the short LC signaling. the

The communication schemes of the existing time division multiple access communication systems are similar to the schemes adopted by the above-mentioned DMR system, and must be processed according to a strict receiving sequence, resulting in a long access time for communication terminals and seriously affecting the access performance of the system. the

Contents of the invention

The invention provides a communication method and a terminal based on the time division multiple access communication system, so as to reduce the access time of the terminal and improve the access performance of the time division multiple access communication system. the

In order to solve the above technical problems, the technical scheme that the present invention takes is:

In a first aspect, the present invention provides a communication method based on a time division multiple access communication system, the method comprising:

The communication terminal receives the embedded signaling frame, and performs embedded information analysis on the embedded signaling frame to obtain embedded signaling and control information;

The communication terminal caches the embedded signaling to a corresponding buffer area according to the control information;

When each corresponding buffer area has buffered the embedded signaling, the communication terminal performs embedded signaling decoding on the embedded signaling in all buffer areas to obtain control signaling. the

Preferably, the communication terminal caches the embedded signaling to a corresponding buffer area according to the control information, including:

According to the position identified by the current control information, the communication terminal caches the current embedded signaling in the buffer area corresponding to the position;

The communication terminal adjusts the cached current embedded signaling position according to the position identified by the current control information and the position identified by the next control information. the

Preferably, before the communication terminal receives the embedded signaling frame, the method further includes:

The communication terminal saves the air interface timing of the current channel;

The communication terminal estimates the air interface timing of the channel to be switched according to the saved air interface timing of the current channel, and synchronizes to the channel to be switched according to the estimated air interface timing. the

Preferably, the communication terminal estimates the air interface timing of the channel to be switched according to the saved air interface timing of the current channel, including:

If the current channel and the channel to be switched are channels of the same frequency and time slot, the communication terminal estimates that the air interface timing of the channel to be switched is equal to the saved air interface timing of the current channel;

If the current channel and the channel to be switched are channels of the same frequency but different time slots, the communication terminal determines the air interface timing of the channel to be switched according to the time slot relationship between the current channel and the channel to be switched. the

Preferably, when the embedded signaling frame is a voice superframe, the method also includes:

The communication terminal checks whether the protocol data unit information in the control signaling indicates a call from the communication terminal;

When the PDU information indicates that it is a call from the communication terminal, the communication terminal turns on the speaker of the terminal to receive the voice call. the

Preferably, when the embedded signaling frame is a common notification channel frame, the method also includes:

The communication terminal checks whether the compressed address in the link control signaling is the compressed address of the communication terminal;

When the compressed address is not the compressed address of the communication terminal, the communication terminal scans the next channel. the

In a second aspect, the present invention provides a communication terminal based on a time division multiple access communication system, the terminal comprising:

A receiving unit for receiving an embedded signaling frame;

The parsing unit is used to analyze the embedded information of the embedded signaling frame to obtain embedded signaling and control information;

A cache unit, configured to cache the embedded signaling to a corresponding cache area according to the control information;

The decoding unit is configured to perform embedded signaling decoding on embedded signaling in all buffer areas to obtain control signaling when each corresponding buffer area has buffered the embedded signaling. the

Preferably, the cache unit includes:

A storage module, configured to cache the current embedded signaling to a buffer area corresponding to the location according to the location identified by the current control information;

The adjustment module is configured to adjust and cache the current embedded signaling according to the position identified by the current control information and the position identified by the next control information. the

Preferably, the terminal also includes:

The storage unit is used to save the air interface timing of the current channel;

The estimation unit is used to estimate the air interface timing of the channel to be switched according to the saved air interface timing of the current channel;

A synchronization unit, configured to synchronize to the channel to be switched according to the estimated air interface timing. the

Preferably, the estimation unit includes:

The first estimation module is used if the current channel and the channel to be switched are channels of the same frequency and time slot,

It is estimated that the air interface timing of the channel to be switched is equal to the saved air interface timing of the current channel;

The second estimation module is used to determine the air interface timing of the channel to be switched according to the time slot relationship between the current channel and the channel to be switched if the current channel and the channel to be switched are channels of the same frequency and different time slots. the

Preferably, when the embedded signaling frame is a voice superframe, the terminal also includes:

The first checking unit is used to check whether the protocol data unit information in the control signaling indicates the call of the communication terminal;

The first control unit is configured to turn on the speaker of the terminal to receive the voice call when the PDU information indicates that the call is from the communication terminal. the

Preferably, when the embedded signaling frame is a common notification channel frame, the terminal further includes:

The second checking unit is used to check whether the compressed address in the link control signaling is the compressed address of the communication terminal;

The second control unit is used to scan the next channel when the compressed address is not the compressed address of the communication terminal. the

The invention provides a communication method and terminal based on a time division multiple access communication system, in order to shorten the communication establishment time and improve the system access performance. The communication terminal receives the embedded signaling frame, analyzes the embedded information of the embedded signaling frame to obtain the embedded signaling and control information, and makes technical preparations for the subsequent caching of the embedded signaling. After parsing the embedded signaling, the The communication terminal caches the embedded signaling into corresponding buffer areas according to the control information, and when each corresponding buffer area has cached the embedded signaling, the communication terminal caches the embedded signaling in all buffer areas The embedded signaling is decoded to obtain the control signaling, and the communication terminal of the present invention does not need to wait for the synchronization frame to be received before parsing the subsequent received embedded signaling frame, but directly parses and caches the received embedded signaling frame The analyzed embedded signaling can shorten the communication establishment time and improve the system access performance. the

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work. the

Fig. 1 is the flow chart of embodiment 1 of the communication method based on time division multiple access communication system of the embodiment of the present invention;

Fig. 2 is the flow chart of embodiment 2 of the communication method based on time division multiple access communication system of the embodiment of the present invention;

Fig. 3 is the flow chart of embodiment 3 of the communication method based on time division multiple access communication system of the embodiment of the present invention;

Fig. 4 is a comparative schematic diagram of the prior art disclosed by the present invention and the technical solution of the present invention;

Fig. 5 is the flow chart of embodiment 4 of the communication method based on time division multiple access communication system of the embodiment of the present invention;

Fig. 6 is the flowchart of embodiment 5 of the communication method based on time division multiple access communication system according to the embodiment of the present invention;

Fig. 7 is a structural diagram of embodiment 1 of a communication terminal based on a time division multiple access communication system according to an embodiment of the present invention;

FIG. 8 is a structural diagram of embodiment 2 of a communication terminal based on a time division multiple access communication system according to an embodiment of the present invention. the

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below in conjunction with the drawings and implementation manners. the

A communication establishment method based on a time division multiple access communication system provided by the present invention can be applicable to communication systems using time division multiple access technology, such as: digital mobile radio system (Digital Mobile Radio, DMR), land trunked radio system (Trans European Trunked Radio, TETRA), police trunking system, etc. the

Referring to Fig. 1, the embodiment of the present invention shown is based on the flow chart of TDMA communication system communication method embodiment 1, the method includes:

In step 101, the communication terminal receives an embedded signaling frame, and performs embedded information analysis on the embedded signaling frame to obtain embedded signaling and control information. the

In the time division multiple access communication system, the communication terminal will receive the embedded signaling frame sent by the base station, and then make a further judgment based on the embedded signaling carried by the embedded signaling frame to perform normal communication. The embedded signaling frame may include : The short link control signaling frame and voice embedded signaling frame are also called voice superframes. Since the communication standards followed by different communication systems may be different, the voice superframes and short link control signaling frames stipulated by different communication standards The frame structure may be different, for example, the position of the subframe carrying the embedded signaling, the number of subframes carrying the embedded signaling may be different, and so on. However, the embedded signaling frame in any system includes embedded signaling and control information, wherein the control information is used to indicate where the current embedded signaling is located in the entire embedded signaling. the

For the convenience of description, only the DMR system is taken as an example below to explain this embodiment. the

In the DMR system, the structure of the embedded signaling frame adopted by different manufacturers is also different. The following only uses the most commonly used voice superframe as an example to explain this embodiment. The voice superframe in DMR is composed of 6 bursts, which are identified by letters A to F in turn, where: burst A indicates the beginning of the superframe, the middle part of A transmits the synchronization word (SYNC), and bursts B to E Embedded signaling and control information are transmitted in the middle, where the control information is Link Control Start/Stop indication (Link Control Start/Stop, LCSS), which is sequentially identified as "start-middle-middle-end" to indicate that each burst carries The position of the embedded signaling in the entire link embedded signaling. the

Step 102, the communication terminal caches the embedded signaling in a corresponding cache area according to the control information. the

This step has the following two implementation methods. The first implementation method may include: the communication terminal caches the current embedded signaling in a buffer area corresponding to the location according to the location identified by the current control information; the communication terminal The cached current embedded signaling position is adjusted according to the position identified by the current control information and the position identified by the next control information. the

The second implementation may include: the communication terminal sequentially caches the parsed embedded signaling; and the communication terminal adjusts the location of each cached embedded signaling according to the position identified by the control information of each embedded signaling. Location. the

The following two implementation modes are respectively explained in specific implementation scenarios. For example, B, C, D, and E carry embedded signaling 1, 2, 3, and 4 in sequence, and the control information is identified as "start-middle-middle-end" in sequence and correspond to buffer areas 1, 2, 3, and 4 in turn. Since the cache areas 2 and 3 cannot determine which embedded signaling should be cached, they must be combined with the control information of the next embedded signaling to make adaptive adjustments. For example: when the first one received is D, the parsed embedded signaling 3 is first cached in buffer area 2, and then the next received signal is E, then the parsed embedded signaling 4 is cached in buffer area 4 , and adjust the previous embedded signaling 2 of B to be cached in the cache area 3. Of course, the parsed four embedded signalings can also be cached first in sequence, and finally the embedded signaling cache position can be adjusted as a whole according to the control information relationship, for example: the receiving sequence is C, D, E, F, A , B, where the embedded signaling is C, D, E, B, and the order of the buffered signaling is 2341, then adjust the buffer position of each signaling according to the instruction of the control information, and the adjusted order is carried by BCDE The embedded signaling 1234 is sequentially buffered in the corresponding buffer 1234. the

Step 103, when each corresponding buffer area has buffered the embedded signaling, the communication terminal performs embedded signaling decoding on the embedded signaling in all buffer areas to obtain control signaling. the

The buffer areas 1, 2, 3, and 4 corresponding to the voice signaling 1, 2, 3, and 4 carried in sequence in B, C, D, and E have all buffered and embedded signaling, indicating that the decoding link control signaling is currently satisfied requirements, the communication terminal performs embedded signaling decoding on the embedded signaling 1, 2, 3, and 4 cached in the buffer areas 1, 2, 3, and 4 to obtain the control signaling, and the communication terminal can make further steps according to the control signaling. communication processing. the

The embodiment of the present invention is based on the communication method of the time division multiple access communication system. In essence, the communication terminal receives the embedded signaling frame, analyzes the embedded information of the embedded signaling frame to obtain the embedded signaling and control information, and then controls the The information caches the embedded signaling to the corresponding buffer area; the communication terminal does not need to receive and analyze the embedded signaling identifiers in sequence from the beginning to the end, but first parses each received embedded signaling frame to carry Embedded signaling, and then cache the embedded signaling, to avoid discarding the signaling frame when the received embedded signaling frame is not in sequence from the beginning to the end. When each corresponding buffer area has cached the embedded signaling, the communication terminal performs embedded signaling decoding on the embedded signaling in all buffer areas to obtain control signaling, which can shorten the communication establishment time and improve System access performance. the

When a communication terminal wants to switch channels or scan, it first needs to detect synchronization first, and adjust its own timing and air interface timing alignment to be able to receive embedded signaling frames normally. Generally, the way to synchronize to the channel is that the communication terminal first searches for the switching channel The timing of the air interface, and then adjust the timing of its own air interface to align with the timing of the switching channel. This method of synchronizing to the channel takes a long time and affects the quality of communication. In order to shorten the time required for synchronization, the embodiment of the present invention provides an optimal solution , referring to Fig. 2, the flow chart of Embodiment 2 of the communication method based on the time division multiple access communication system shown, the method may include:

Step 201, the communication terminal saves the air interface timing of the current channel;

Step 202, the communication terminal estimates the air interface timing of the channel to be switched according to the saved air interface timing of the current channel, and synchronizes to the channel to be switched according to the estimated air interface timing. the

In the existing digital time division multiple access communication system DMR, when the communication terminal switches from channel 1 to channel 2, it will clear the air interface timing of channel 1, first detect the air interface timing in channel 2, and then synchronize its own receiving timing The air interface timing of the detected channel 2 is detected, so that the synchronization between the communication terminal and the channel 2 is realized. Before the synchronization is not detected, the physical layer will not upload data to the link layer. Only after the synchronization is detected, that is, the communication terminal After synchronizing its receiving timing to the air interface timing of channel 2, the physical layer will pass the received data to the link layer for processing, and the communication terminal can receive the embedded signaling frame. Therefore, in order to receive the frame faster Embedded in signaling frames, faster synchronization to the channel is required. the

In practical applications, preferably, the step 202 may include:

If the current channel and the channel to be switched are channels of the same frequency and time slot, the communication terminal estimates that the air interface timing of the channel to be switched is equal to the saved air interface timing of the current channel;

If the current channel and the channel to be switched are channels of the same frequency but different time slots, the communication terminal determines the air interface timing of the channel to be switched according to the time slot relationship between the current channel and the channel to be switched. the

Step 203, the communication terminal receives the embedded signaling frame, and performs embedded information analysis on the embedded signaling frame to obtain embedded signaling and control information;

Step 204, the communication terminal caches the embedded signaling to a corresponding buffer area according to the control information;

Step 205, when each corresponding buffer area has buffered the embedded signaling, the communication terminal performs embedded signaling decoding on the embedded signaling in all buffer areas to obtain control signaling. the

Steps 203-205 are the same as the above-mentioned steps 101-103, and will not be repeated here. the

The embodiment of the present invention is based on the communication method of the time division multiple access communication system, which can not only shorten the time for decoding control signaling, but also shorten the channel synchronization time of the communication terminal. When the channel is in the same slot, the air interface timing of the current channel is saved, and the air interface timing is adaptively adjusted according to the saved air interface timing to synchronize to the channel to be switched. There is no need to search for the air interface timing. Embedded signaling frames are received as soon as possible. the

In the above-mentioned embodiment 1 and embodiment 2, the communication terminal decodes the control signaling and needs to make further judgments based on the control signaling, and different judgments need to be made for different types of control signaling. Based on this technical problem, the present invention also provides the following preferred solutions. the

On the basis of the above-mentioned embodiment 1 or embodiment 2, when the embedded signaling frame is a voice superframe, the method may also include:

The communication terminal checks whether the protocol data unit information in the control signaling indicates the call of the communication terminal; when the protocol data unit information indicates the call of the communication terminal, the communication terminal turns on the speaker of the communication terminal to access voice call. the

On the basis of the above-mentioned embodiment 1 or embodiment 2, when the embedded signaling frame is a common notification channel frame, the method may further include:

The communication terminal checks whether the compressed address in the link control signaling is the compressed address of the communication terminal; when the compressed address is not the compressed address of the communication terminal, the communication terminal scans the next channel. the

According to the above method, the communication terminal can quickly judge whether to join the call or know the forwarding situation of the downlink channel in advance, which improves the communication quality of the system. the

The communication method of the present invention is further explained by taking a specific application scenario where the voice enters late as an example. In order to compare and analyze the beneficial effects of the embodiments of the present invention more clearly, first briefly introduce the voice delay in the existing DMR system. The processing plan of the later entry, the plan is: when the communication terminal switches channels, it must first find the synchronization frame A, because only the A frame has voice synchronization, and the reception of B, C, D, E, F can only be started after the timing sequence of the air interface is synchronized. , analyze the link control start/end indication (LCSS) of the embedded signaling area, and receive them sequentially according to the order of "start-middle-middle-end" of the LCSS, and then when the four embedded signalings are all received, then Perform embedded signaling decoding, and finally restore the link control header. The communication terminal judges whether it is a call from the communication terminal according to the protocol data unit information in the link control header. If so, turn on the speaker of the communication terminal to receive it. voice. The voice delay entry control method of the embodiment of the present invention, referring to Fig. 3, the flowchart of the communication method embodiment 3 based on the time division multiple access communication system of the embodiment of the present invention shown, the method may include:

Step 301, the communication terminal saves the air interface timing of the current channel, and synchronizes to the air interface timing of the channel to be switched according to the air interface timing of the current channel. the

In the existing digital time division multiple access communication system DMR, when the communication terminal switches from channel 1 to channel 2, it will clear the air interface timing of channel 1, first detect the air interface timing in channel 2, and then synchronize its receiving timing to The air interface timing of channel 2 is detected, so that the synchronization between the communication terminal and channel 2 is realized. Before the synchronization is detected, the physical layer will not upload data to the link layer. Only after the synchronization is detected, that is, the terminal will send itself After the receiving timing of the channel is synchronized to the air interface timing of channel 2, the physical layer will pass the received data to the link layer for processing, and the communication terminal can receive the voice burst. the

And this step can realize the synchronization between the communication terminal and the channel to be switched in the following ways:

The communication terminal saves the air interface timing of the current channel, and judges whether the current channel and the channel to be switched are channels of the same frequency and different time slots;

If the current channel and the channel to be switched are channels of the same frequency and time slot, the communication terminal synchronizes to the channel to be switched according to the saved air interface timing of the current channel;

If the current channel and the channel to be switched are channels of the same frequency but different time slots, the communication terminal increases the saved air interface timing of the current channel by 30 ms, and synchronizes to the channel to be switched. the

Taking the DMR time division multiple access communication system with two time slots as an example, the current channel where the communication terminal is located is channel 1, and the channel to be switched is channel 2. When the communication terminal is on channel 1, the receiving timing is synchronized to that of air interface time slot 1. Timing, the communication terminal only receives voice or data in time slot 1. When switching to channel 2, if channel 1 and channel 2 are the same frequency and time slot, their receiving timing can remain unchanged, that is to say, according to the saved channel The receiving timing of channel 1 can be synchronized to channel 2, so that there is no need to re-obtain the air interface timing of channel 2 through synchronization detection. the

If channel 1 and channel 2 have the same frequency but different time slots, since the air interface difference between time slot 2 of channel 2 and time slot 1 of channel 1 is 30ms, it is only necessary to move the saved timing of channel 1 to the right by 30ms. Obtain the receiving timing of the air interface of channel 2. In the case where the air interface timing of the current channel is known, even if the voice synchronization A is not detected, the voice burst can still be received first for embedded signaling information analysis to ensure that the communication terminal can access the call as soon as possible. the

Step 302, the communication terminal receives the voice burst, and performs embedded information analysis on the voice burst to obtain embedded signaling and link control start/stop indication. the

The speech superframe in DMR is based on six speech bursts, and the six speech bursts are identified by the letters ABCDEF, and the speech is sent cyclically in the order of A-B-C-D-E-F. Burst A carries synchronization information and is a synchronization frame. There are four bursts in the burst BCDEF Sending carries embedded signaling, and these four voice bursts all carry Link Control Start/Stop indication (Link Control Start/Stop, LCSS), LCSS is used to indicate the position of the voice burst in a complete voice is beginning, middle or end. For example, both burst BCDEs carry embedded signaling, BCDEs both carry LCSS, and the embedded signaling position of burst F is empty; if BDEF both carry embedded signaling, the embedded signaling position of burst C is empty. Of course, different manufacturers adopt different standards, which are not specifically limited in this embodiment. the

In order to facilitate the understanding of the solution of the embodiment of the present invention, the type of "burst BCDEs all carry embedded signaling, and the embedded signaling position of burst F is empty" is taken as an example for explanation below. the

If the first speech burst received is burst B, the following processing is performed in sequence according to the order in which the speech bursts are received:

Parse burst B to get embedded signaling 1 and LCSS is 1; LCSS is 1 to identify the embedded signaling 1

is the first piece of embedded signaling, ie the LCSS indicates start. the

Analyze the burst C to get the embedded signaling 2 and the LCSS is 3; the LCSS is 3 to identify the embedded signaling 1

is the middle slice embedded in the signaling, ie the LCSS indicates the middle. the

The burst D is parsed to obtain the embedded signaling 3 and the LCSS is 3; the LCSS being 3 indicates that the embedded signaling 3 is the middle slice of the embedded signaling, that is, the LCSS indicates the middle. the

The burst E is analyzed to obtain the embedded signaling 4 and the LCSS is 2; the LCSS being 2 indicates that the embedded signaling 4 is the last piece of the embedded signaling, that is, the LCSS indicates the end. the

Step 103, the communication terminal caches the embedded signaling into corresponding buffer areas according to the link control start/stop indication, and determines four buffer areas to store the corresponding embedded signaling. the

Preferably, step 303 may include:

The LCSS indicates that it is started, and the embedded signaling is cached in the first buffer area;

When the LCSS indicates that it is intermediate and the next LCSS indicates that it is intermediate, cache the embedded signaling to the second buffer;

When the LCSS indicates that it is in the middle and the next LCSS indicates that it is the end, cache the embedded signaling to the third buffer area;

The LCSS indicates that it is finished, cache the embedded signaling in the fourth buffer area; and determine that all four buffer areas cache the corresponding embedded signaling. the

According to the LCSS of step 302 parsing the received speech burst, the above-mentioned operations according to step 303 may include: the LCSS indication of the first burst is started, and the embedded signaling 1 is buffered in the first buffer area; the second burst The LCSS indication of the third burst is the middle, and the LCSS indication of the next burst is also the middle, then the embedded signaling 2 is cached in the second buffer area; the LCSS indication of the third burst is the middle, and the LCSS indication of the next burst is To end, the embedded signaling 2 is buffered in the third buffer area; the third burst

The LCSS indicates the end, and caches the embedded signaling 4 in the fourth buffer area. the

Since the LCSS indicators of two voice bursts in the voice superframe are both in the middle, in order to accurately buffer the embedded signaling carried by each burst into the corresponding buffer area, it is necessary to use the LCSS indicator of the next burst Make judgment adjustments. the

For example: if the burst D is first received, the LCSS indicates the middle, and the embedded signaling is cached in the second buffer area first, and the next LCSS that receives the burst E is indicated as the end, and the signaling is embedded in the burst E Cache to the fourth buffer area, if the third buffer area is empty and the fourth buffer area is full, it indicates that the buffer position of the burst D is wrong, and the data in the second buffer area needs to be copied to the third buffer area, and at the same time the data in the second buffer area is copied to the third buffer area. The data in the second buffer area is cleared. That is to say, when the LCSS indication is in the middle, it is necessary to adjust the buffer area embedded in the signaling according to the LCSS indication of the next burst. Subsequent receiving bursts F, A, B, and C in sequence, if the LCSS of the burst B starts, cache the embedded signaling it carries in the first buffer area, and if the LCSS of the burst C The LCSS is in the middle, and the embedded signaling carried by it is cached in the second buffer area. So far, the data in the four buffer areas all cache the corresponding embedded signaling. the

Step 304, the communication terminal decodes the embedded signaling in the four buffer areas to obtain the link control signaling. the

The embedded signaling stored in each buffer area is 32 bits, and the four buffer areas have a total of 128 bits. By decoding the 128-bit embedded signaling, a 72-bit link control signaling is generated. the

In order to analyze the beneficial effects of the above-mentioned embodiments of the present invention more clearly, the solutions of the above-mentioned embodiments of the present invention are compared with the communication establishment schemes in the prior art below. For details, please refer to FIG. 4 . A comparative schematic diagram of the solutions of the present invention. the

Using the scheme of the prior art, the burst A carrying the synchronization information must be found first, and then the subsequent received bursts are parsed; if the first received voice burst is burst B, the sequence must be followed After receiving the C-D-E-F-A-B-C-D-E, the embedded signaling marked as "start-middle-middle-end" by the LCSS can be obtained according to the analysis, and then the four embedded instructions are decoded to generate link control signaling. As shown in Figure 4, if the first one received is burst B, then the present invention can save 360ms compared with the prior art; Compared with technology, it can save 60ms. the

It can be seen that: the communication terminal of the embodiment of the present invention directly analyzes the received voice burst to obtain the embedded signaling, and caches it in the corresponding buffer area according to the LCSS of the embedded signaling; when the four buffer areas are full When , the embedded signaling is decoded to obtain the link control signaling. In the case where the timing of the air interface is known, the present invention does not need to search for burst A carrying synchronization information, and does not need to wait until burst A is received before analyzing and processing the received burst carrying embedded signaling. The received voice burst is analyzed, and the obtained embedded signaling is cached for processing. Therefore, the present invention can shorten the access time for establishing communication. the

The present invention will be explained below by taking the application scenario of retrace priority as an example. The preferred retrace process is: the communication terminal is currently on the channel F1, if the priority retrace timer is overtime, the retrace priority channel F2, if there is a priority call of the terminal in the channel F2, the terminal accesses the call on the channel F2, to be completed After calling, switch to channel F1; if there is no priority call of the terminal in channel F2, the terminal switches to channel F1 and continues to receive voice, until the next retrace interval arrives and retraces channel F2 again. Because the voice interruption time of the existing priority retrace scheme is too long, which affects the communication quality, based on this technical problem, the present invention also provides the following preferred solution, which is used to reduce the voice interruption time in the priority retrace and ensure the communication quality. the

Referring to Fig. 5, the flow chart of embodiment 4 of the communication method based on the time division multiple access communication system of the embodiment of the present invention shown, the method may include:

Step 401, the communication terminal saves the air interface sequence of the current channel F1, and switches to the priority channel F2 for detection. the

When the communication terminal detects that there is a voice call from the terminal on channel F1 after scanning is turned on, it stops scanning and turns on the loudspeaker to start accessing and playing the voice. When the priority retrace timer expires, the terminal starts to perform priority retrace. Before the priority retrace, the terminal saves the air interface timing of the current channel F1, and then switches to the priority channel F2 for detection, and at the same time switches the state to the priority retrace state. the

Step 402, when the communication terminal detects that there is a voice signal on the air interface, it sequentially receives voice bursts and performs embedded information analysis on the voice bursts to obtain embedded signaling and link control start/stop indication LCSS;

Step 403, the communication terminal caches the embedded signaling to the corresponding buffer area according to the link control start/stop instruction, and determines four buffer areas to store the corresponding embedded signaling;

Step 404, the communication terminal decodes the embedded signaling in the four buffer areas to obtain the link control signaling;

Step 405, the communication terminal parses the protocol data unit information in the link control signaling, and judges whether it is a call from the terminal according to the protocol data unit information;

Step 406, if yes, the communication terminal turns on the speaker of the terminal to access the voice call, and enters the scanning pause state;

Step 407, if not, the communication terminal switches back to the channel F1, restores the air interface timing of the channel F1, receives the voice bursts in turn, and analyzes the embedded information of the voice bursts to obtain embedded signaling, link control start/stop Instructions and voice payloads are decoded and sent to the speaker. the

In the existing technology, only when the protocol data unit information in the link control signaling is analyzed and it is judged that the call is to the terminal, the speaker is notified to be turned on, and when the next voice burst is received, its effective voice load is decoded sent to the speakers. For example, the terminal receives A, B, C, D, E, F, only when the E frame parses out the link control signaling protocol data unit information, judges that it is a terminal call, and notifies to turn on the speaker. When F is received, the F The voice information on both sides is decoded and sent to the speaker. the

In this embodiment, there is no need to wait for the protocol data unit information in the link control signaling to be parsed out. It is judged that it is a call from the terminal, and then the loudspeaker is notified to be turned on. Instead, after synchronizing to channel F1, the parsed voice payload is decoded and sent to The loudspeaker, so that when the communication terminal switches back to the channel F1, the voice connection can be performed quickly. the

Step 408, the communication terminal caches the embedded signaling to the corresponding buffer area according to the link control start/stop instruction, and determines four buffer areas to store the corresponding embedded signaling;

Step 409, the communication terminal decodes the embedded signaling in the four buffer areas to obtain the link control signaling. the

It can be seen from the above embodiments that the communication method provided by the present invention does not need to wait for a synchronization frame during resynchronization when switching channels, and can receive voice bursts in time, thereby greatly reducing the voice interruption time. the

In the following, the present invention is explained by taking the late entry application scenario of the short link control signaling as an example. First, the access scheme of the short link control signaling in the prior art is briefly introduced. The existing scheme is: the communication terminal is turned on Scanning, when the transit channel is scanned, receive 4 common announcement channel (Common Announcement Channel, CACH) frames sequentially according to the LCSS identification as "start-middle-middle-end" (each 30ms voice or data burst carries a CACH frame), the short embedded signaling is obtained by analyzing the embedded information of the CACH frame, and a short link control signaling can be parsed out by continuously receiving 4 short embedded signaling, and the compressed address carried by the short link control signaling is judged Whether it belongs to the terminal, if not, start to scan the next channel. In order to shorten the access time of the short link control signaling and improve the scanning performance, the embodiments of the present invention provide the following preferred solutions. the

Referring to Fig. 6, the flow chart of embodiment 5 of the communication method based on the time division multiple access communication system of the embodiment of the present invention shown, the method may include:

Step 501, the communication terminal receives the public notification channel frame in turn, and performs embedded information analysis on the public notification channel frame to obtain the short embedded signaling and link control start/stop indication;

Step 502, the communication terminal caches the short embedded signaling into corresponding buffer areas according to the link control start/stop instruction, and determines four buffer areas to store the corresponding short embedded signaling. the

Step 502 may include:

When the LCSS indicates start, the communication terminal caches the short embedded signaling in the first buffer area;

When the LCSS indicates that it is intermediate and the next LCSS indicates that it is intermediate, the communication terminal caches the short embedded signaling in the second buffer area;

When the LCSS indicates the middle and the next LCSS indicates the end, the communication terminal caches the short embedded signaling to the third buffer area;

When the LCSS indicates the end, the communication terminal caches the short embedded signaling in the fourth buffer area;

The communication terminal determines that all four buffer areas cache the corresponding short embedded signaling. the

For example: when the LCSS identifier of the first CACH frame received is intermediate, and the LCSS identifier of the next CACH frame received is intermediate, then the embedded signaling of the first received CACH frame is cached in the second cache area, buffering the received embedded signaling of the second CACH frame in the third buffer area. the

Step 503, the communication terminal decodes the short embedded signaling in the four buffer areas to obtain the short link control signaling. the

Preferably, the method also includes:

Analyzing the compressed address in the short link control signaling, and judging whether the compressed address is the compressed address of the terminal, if not, the communication terminal scans the next channel. the

In order to compare the beneficial effects of the above embodiments of the present invention, a simple analysis of the CACH parsing short LC processing method in the prior art will be made below. the

In the existing solution, when the LCSS identifier obtained by parsing the first received CACH frame is intermediate, it will not be retained and not processed, and the LCSS identifier obtained by subsequent CACH parsing is sequentially intermediate-end, and will not be retained. Do not process until the fourth CACH frame is received and analyzed to get the LCSS flag as "start", then the subsequent received CACH frames are parsed and processed, and finally the received frames are "start-middle-middle-end" according to the LCSS mark Decode the short embedded signaling in the four CACH frames to obtain the short link control signaling. It can be seen that the prior art scheme needs to receive 7 CACH frames to decode and obtain the short link control signaling in this case, but the present invention only needs to receive 4 CACH frames to decode and obtain the short link control signaling. Next, the present invention can shorten the access time of short LC in CACH. the

Corresponding to Embodiment 1 of the communication method based on the time division multiple access communication system in the embodiment of the present invention, the embodiment of the present invention provides a communication terminal based on the time division multiple access communication system. Referring to FIG. A structural diagram of Embodiment 1 of a communication terminal, the communication terminal may include: a receiving unit 701 , an analyzing unit 702 , a buffering unit 703 and a decoding unit 704 . The following will further introduce its internal structure and connection relationship in combination with the working principle of the device. the

A receiving unit 701, configured to receive an embedded signaling frame;

The analysis unit 702 is used to perform embedded information analysis on the embedded signaling frame to obtain embedded signaling and control information;

A cache unit 703, configured to cache the embedded signaling to a corresponding cache area according to the control information;

The decoding unit 704 is configured to perform embedded signaling decoding on embedded signaling in all buffer areas to obtain control signaling when each corresponding buffer area has buffered the embedded signaling. the

Preferably, the cache unit may include:

The first storage module is used to cache the current embedded signaling in the buffer area corresponding to the location according to the location identified by the current control information;

The first adjustment module is configured to adjust and buffer the current embedded signaling according to the position identified by the current control information and the position identified by the next control information. the

Preferably, the cache unit may include:

The second storage module is used to sequentially cache the parsed embedded signaling;

The second adjustment module is configured to adjust the cached position of each embedded signaling according to the position identified by the control information of each embedded signaling. the

Preferably, when the embedded signaling frame is a voice superframe, the terminal may also include:

The first checking unit is used to check whether the protocol data unit information in the control signaling indicates the call of the communication terminal;

The first control unit is configured to turn on the speaker of the terminal to receive the voice call when the PDU information indicates that the call is from the communication terminal. the

Preferably, when the embedded signaling frame is a common notification channel frame, the terminal may further include:

The second checking unit is used to check whether the compressed address in the link control signaling is the compressed address of the communication terminal;

The second control unit is used to scan the next channel when the compressed address is not the compressed address of the communication terminal. the

It can be seen from the above embodiments of the present invention that the communication terminal receives the embedded signaling frame, performs embedded information analysis on the embedded signaling frame to obtain embedded signaling and control information, and then converts the embedded signaling according to the control information Buffer to the corresponding buffer area; the communication terminal does not need to receive the parsing process in strict accordance with the order of the embedded signaling identifier from the beginning to the end, but first parses the embedded signaling carried by each embedded signaling frame received, and then The embedded signaling is cached to avoid discarding the signaling frames when the embedded signaling frames are received in a sequence that is not from the beginning to the end. When each corresponding buffer area has buffered the embedded signaling, the communication terminal performs embedded signaling decoding on the embedded signaling in all buffer areas to obtain the control signaling, which shortens the time required for decoding the control signaling. Time, can improve the communication quality. the

Corresponding to Embodiment 2 of the communication method based on the time division multiple access communication system in the embodiment of the present invention, the embodiment of the present invention provides a communication terminal based on the time division multiple access communication system. Referring to FIG. A structural diagram of Embodiment 2 of a communication terminal, the communication terminal may include: a storage unit 801, an estimation unit 802, a synchronization unit 803, a receiving unit 804, an analysis unit 805, a cache unit 806, and a decoding unit 807. The following will further introduce its internal structure and connection relationship in combination with the working principle of the device. the

Save unit 801, used to save the air interface timing of the current channel;

The estimation unit 802 is configured to estimate the air interface timing of the channel to be switched according to the stored air interface timing of the current channel. the

The synchronization unit 803 is configured to synchronize to the channel to be switched according to the estimated air interface timing. the

A receiving unit 804, configured to receive an embedded signaling frame;

The analysis unit 805 is used to perform embedded information analysis on the embedded signaling frame to obtain embedded signaling and control information;

A cache unit 806, configured to cache the embedded signaling to a corresponding cache area according to the control information;

The decoding unit 807 is configured to perform embedded signaling decoding on embedded signaling in all buffer areas to obtain control signaling when each corresponding buffer area has buffered the embedded signaling. the

The foregoing 804-807 are the same as the foregoing embodiments 701-704, and details are not repeated here. the

The estimation unit includes:

The first estimation module is used if the current channel and the channel to be switched are channels of the same frequency and time slot,

It is estimated that the air interface timing of the channel to be switched is equal to the saved air interface timing of the current channel;

The second estimation module is used to determine the air interface timing of the channel to be switched according to the time slot relationship between the current channel and the channel to be switched if the current channel and the channel to be switched are channels of the same frequency but different time slots. the

The communication terminal in the embodiment of the present invention can not only shorten the time for decoding control signaling, but also shorten the time for channel synchronization of the communication terminal, specifically by saving the current channel when performing same-frequency scanning or channels of the same frequency and different time slots in the transit mode The air interface timing is adaptively adjusted according to the saved air interface timing to synchronize to the channel to be switched, so that the communication terminal can quickly access the channel to shorten the access time. the

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or sequence. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, means, article, or equipment comprising a list of elements includes not only those elements, but also includes elements not expressly listed. other elements identified, or also include elements inherent in such a process, device, article, or equipment. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, apparatus, article or equipment comprising said element. the

It should be noted that those of ordinary skill in the art can understand that all or part of the processes in the devices of the above embodiments can be implemented by instructing related hardware through computer programs, and the programs can be stored in computer-readable storage media When the program is executed, it may include the procedures of the embodiments of the above-mentioned devices. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), etc. the

The communication method and terminal based on the time division multiple access communication system provided by the present invention have been introduced in detail above. The principles and implementation methods of the present invention have been explained by using specific embodiments in this paper. The description of the above embodiments is only for To help understand the device of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application range. In summary, the content of this specification It should not be construed as a limitation of the invention. the

Claims (12)

1. the communication means based on TDMA communication system, is characterized in that, comprising:

Communication terminal receives and embeds signaling frame, described embedding signaling frame is carried out to embedded information analysis and obtain embedding signaling and control information;

Described communication terminal according to described control information by described embedding signaling buffer memory to corresponding buffer area;

When embedding signaling described in each corresponding buffer area buffer memory, described communication terminal carries out the controlled signaling of embedded signaling decoding to the embedding signaling in all buffer areas.　

2. method according to claim 1, is characterized in that, the described control information of described communication terminal foundation to corresponding buffer area, comprises described embedding signaling buffer memory:

The position that described communication terminal identifies according to current control information, by current embedding signaling buffer memory to the buffer area corresponding with described position;

The position that the position that described communication terminal identifies according to current control information and next control information identify, the position of the current embedding signaling of adjustment institute buffer memory.　

3. according to claim 1 or claim 2, it is characterized in that, before described communication terminal receives embedding signaling frame, described method also comprises:

Described communication terminal is preserved the sequential of eating dishes without rice or wine of current channel;

Described communication terminal is estimated the sequential of eating dishes without rice or wine of to be switched channel according to the sequential of eating dishes without rice or wine of the current channel of preserving, according to the estimated extremely described to be switched channel of timing synchronization of eating dishes without rice or wine.　

4. method according to claim 3, is characterized in that, described communication terminal is estimated the sequential of eating dishes without rice or wine of to be switched channel according to the sequential of eating dishes without rice or wine of the current channel of preserving, comprising:

If current channel and to be switched channel are the channels of co-frequency co-time slot, described communication terminal estimates that the sequential of eating dishes without rice or wine of to be switched channel equals the preserved current channel sequential of eating dishes without rice or wine;

If current channel and to be switched channel are the channels with frequency different time-gap, described communication terminal, according to the time slot relation of current channel and to be switched channel, is determined the sequential of eating dishes without rice or wine of described to be switched channel.　

5. according to claim 1 or claim 2, it is characterized in that, when described embedding signaling frame is voice superframes, described method also comprises:

Described communication terminal checks whether the protocol data unit information in described control signal is designated as the calling of this communication terminal;

When described protocol data unit information indication is the calling of this communication terminal, described communication terminal is opened this terminal speaker access audio call.　

6. according to claim 1 or claim 2, it is characterized in that, when described embedding signaling frame is public notification channel frame, described method also comprises:

Described communication terminal checks whether the address compression in described link control signal is the address compression of this communication terminal;

When described address compression is not the address compression of this communication terminal, described communication terminal scans next channel.　

7. the communication terminal based on TDMA communication system, is characterized in that, comprising:

Receiving element, for receiving embedding signaling frame;

Resolution unit, obtains embedding signaling and control information for described embedding signaling frame is carried out to embedded information analysis;

Buffer unit, for according to described control information by described embedding signaling buffer memory to corresponding buffer area;

Decoding unit, for when embedding signaling described in each corresponding buffer area buffer memory, carries out the controlled signaling of embedded signaling decoding to the embedding signaling in all buffer areas.　

8. terminal according to claim 7, is characterized in that, described buffer unit, comprising:

Storage module, for the position identifying according to current control information, by current embedding signaling buffer memory to the buffer area corresponding with described position;

Adjusting module, the position identifying for the position that identifies according to current control information and next control information, adjusts current embedding signaling described in buffer memory.　

9. according to the terminal described in claim 7 or 8, it is characterized in that, described terminal, also comprises:

Storage unit, for preserving the sequential of eating dishes without rice or wine of current channel;

Estimation unit, the sequential of eating dishes without rice or wine of the current channel of preserving for foundation is estimated the sequential of eating dishes without rice or wine of to be switched channel;

Lock unit, for the extremely described to be switched channel of timing synchronization of eating dishes without rice or wine according to estimated.　

10. terminal according to claim 9, is characterized in that, described estimation unit, comprising:

The first estimation module, if while being the channel of co-frequency co-time slot for current channel and to be switched channel,

The sequential of eating dishes without rice or wine of estimating to be switched channel equals the preserved current channel sequential of eating dishes without rice or wine;

The second estimation module, if while being the channel with different time-gap frequently for current channel and to be switched channel, determines the sequential of eating dishes without rice or wine of described to be switched channel according to the time slot relation of current channel and to be switched channel.　

11. according to the terminal described in claim 7 or 8, it is characterized in that, when described embedding signaling frame is voice superframes, described terminal also comprises:

First checks unit, for checking whether the protocol data unit information of described control signal is designated as the calling of this communication terminal;

The first control unit, for when described protocol data unit information indication is the calling of this communication terminal, opens this terminal speaker access audio call.　

12. according to the terminal described in claim 7 or 8, it is characterized in that, when described embedding signaling frame is public notification channel frame, described terminal also comprises:

Second checks unit, for checking whether the address compression of described link control signal is the address compression of this communication terminal;

The second control unit, for when described address compression is not the address compression of this communication terminal, scans next channel.　

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