CN1725878A - Data process method of media access control protocol layer in digital trunking system - Google Patents
Data process method of media access control protocol layer in digital trunking system Download PDFInfo
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Abstract
A method for processing data of media access control protocol layer in data trunking system includes removing off RLP layer function process for each of them in MS and BSC on procedure of setting up trunking voice call and processing voice data in MS and BSC through high layer, Mux sub -layer in MAC layer and PHY layer separately in voice data transmission procedure for this time of cluster voice service call.
Description
Technical field
The present invention relates to the data processing technique in a kind of digital cluster system, the data processing method of medium access control protocol (MAC) layer in particularly a kind of digital cluster system.
Background technology
At present, when realizing that in CDMA, CDMA 2000 or CDMA 1X system Digital Clustering is professional, in order to save base station power, the general method that all adopts forward direction shared service channel, the base station sends traffic frame by forward direction shared service channel, and a plurality of users monitor forward direction shared service channel simultaneously and obtain traffic frame.
In addition, for digital cluster system, be to adopt packet network to come transferring voice at network side, that is to say that the cluster voice are actually and transmit in the transmission of packet data mode of agreement regulation.Below in conjunction with accompanying drawing the transmission means of cluster voice in CDMA, CDMA 2000 or the CDMA 1X system is described in detail.
Fig. 1 is the service surface protocal layers distributed architecture and the corresponding relation schematic diagram of concentrated speech business between existing portable terminal (MS) and the base station controller (BSC).As shown in Figure 1, the protocol stack of MS and BSC both sides is divided into: physics (PHY) layer, MAC layer and upper-layer protocol layer.Here, described upper-layer protocol layer comprises: PPP(Point-to-Point Protocol) layer, IP layer etc.In addition, radio link control (RLP) layer and multiplexing (Mux) sublayer are respectively the protocol sublayers that is arranged in the MAC layer, regulation according to agreement, grouped data need be through the processing of RLP layer at the MAC layer, also just need processing when like this, the cluster voice transmit through the RLP layer between MS and BSC.Based on above-mentioned protocol stack structure, when MS when BSC transmits the cluster voice, the high level of MS side is issued to the RLP layer with vocoded data after voice are carried out speech coding; The data that the RLP layer is sent high level are cut apart, and are packaged into rlp frame, are sent to the Mux sublayer again; The Mux sublayer is multiplexed with Mux protocol Data Unit (PDU) with rlp frame, and MuxPDU is assembled into physics SDU is sent to the PHY layer again and encodes and modulate, and by eating dishes without rice or wine data is sent to base station system (BSS) side then; The base station of BSS (BTS) receives data from the forward direction Dedicated Traffic Channel and carries out demodulation and be sent to BSC; Transfer of data through the decoding processing of PHY layer, is sent to the Mux sublayer earlier then behind BSC; The Mux sublayer carries out being uploaded to the RLP layer after the demultiplexing to data; The RLP layer is separated rlp frame to the data that receive and is handled, and is sent to high level again, by high level valid data is formed packet data package and is sent to packet network.
What wherein, the RLP layer adopted is that non-affirmation (NAK) retransmission mechanism carries out transfer of data.That is to say that the RLP layer needs this rlp frame is carried out buffer memory after whenever issuing a rlp frame,, think that then this rlp frame sends failure, thereby the corresponding rlp frame of buffer memory is resend if receive the NAK frame that returns the opposite end.This retransmission mechanism is extremely important for the accuracy that guarantees packet data transmission, but problems will appear in the transmission that is applied to the cluster voice.
The purpose that digital cluster system is realized mainly is exactly an immediate communication, require for the promptness of voice higher, if the cluster speech data handle through the RLP layer, will be owing to the NAK retransmission mechanism of RLP layer, and increase the time delay of voice greatly.Certainly, what have also at present that the RLP layer of scheme adopts is transparent transmission mechanism, be that the RLP layer does not adopt the NAK retransmission mechanism, nonetheless, because the cluster voice will be conciliate processing such as frame through over-segmentation, framing respectively at the RLP layer of MS and BSC side, the handling process complexity also can increase voice delay time, thereby is unfavorable for the transmission of cluster voice.
According to above processing for the cluster voice as seen, in CDMA, CDMA 2000 or CDMA 1X system, realize the Digital Clustering business at present, the cluster voice adopt packet network to transmit, and can increase the propagation delay time of cluster voice, make the speech quality of group system undesirable.
Summary of the invention
In view of this, main purpose of the present invention is to provide the data processing method of MAC layer in a kind of digital cluster system, can reduce the propagation delay time of cluster voice greatly, guarantees speech quality.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention discloses the data processing method of MAC layer in a kind of digital cluster system, its main treatment step is:
A. in the call establishment of concentrated speech business, MS and the RLP layer function that BSC removes separately under it are handled;
B. in the voice data transmission process that this concentrated speech business is called out, speech data is handled through Mux sublayer in high level, the MAC layer and PHY layer in MS and BSC respectively.
Among the step a, describedly judge that this calls out whether to be the method for concentrated speech business be: MS and BSC judge according to the business option in this call setup message (SO) whether this calling is concentrated speech business.
Among the step a, described MS and BSC mode through consultation remove the processing of RLP layer function.
Among the step a, described negotiation mode is:
A1.MS or BSC send the request of negotiation to the other side;
A2.BSC or MS return to the other side and consult to reply.
Among the step b, when described speech data transmits in MS, handle through described Mux sublayer and PHY layer successively after high level issues in the uplink voice data, after the downlink voice data are successively through described PHY layer and Mux sub-layer processes, be sent to high level.
Among the step b, described up link at MS, the speech sample data of speech data are treated to vocoded data at high level, by the Mux sublayer vocoded data is multiplexed with MuxPDU and MuxPDU is assembled into physics SDU again, by the PHY layer physics SDU are encoded at last and modulate.
Among the step b, described down link at MS, speech data, is resolved into MuxPDU with physics SDU and is vocoded data with the MuxPDU demultiplexing by the Mux sublayer through decoding be demodulated to and be physics SDU at the PHY layer, by high level vocoded data is carried out decoding processing at last.
Among the step b, when described speech data transmits in BSC, after the uplink voice data are successively through described PHY layer and Mux sub-layer processes, be sent to high level, after high level issues, handle through described Mux sublayer and PHY layer successively in the downlink voice data.
Among the step b, described up link at BSC, speech data is decoded at the PHY layer and is physics SDU, by physics SDU is resolved into MuxPDU and being vocoded data with the MuxPDU demultiplexing in the Mux sublayer, high-risely vocoded data is formed packet data package mails to packet data network at last.
Among the step b, described down link at BSC, the grouped data of being made up of speech data wraps in high level and is broken down into vocoded data, by the Mux sublayer vocoded data is multiplexed with MuxPDU and MuxPDU is assembled into physics SDU again, by the PHY layer physics SDU is encoded at last.
By such scheme as can be seen, key of the present invention is: MS and the SO that BSC passes through in the call setup message under it discern concentrated speech business, and the RLP sublayer function treatment of removal MAC layer, thereby the cluster speech data needn't pass through the RLP sub-layer processes when the MAC layer transmits.
Therefore, the data processing method of MAC layer in a kind of digital cluster system provided by the present invention can make the cluster voice transmit with lower-delay, thereby has guaranteed the voice quality of Digital Clustering business.
Description of drawings
Fig. 1 is the service surface protocal layers distributed architecture and the corresponding relation schematic diagram of concentrated speech business between existing MS and the BSC;
Fig. 2 handles a preferred embodiment handling process schematic diagram for removing the RLP layer function in the inventive method call establishment;
Fig. 3 handles another preferred embodiment handling process schematic diagram for removing the RLP layer function in the inventive method call establishment;
Fig. 4 is the service surface protocal layers distributed architecture and the corresponding relation schematic diagram of concentrated speech business between MS and the BSC in the inventive method.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
In the inventive method, the SO that MS and BSC set up message by call identifying judges whether current calling is concentrated speech business, if, to remove the RLP layer separately and handle, speech data is handled without the RLP layer when the MAC layer transmits; Otherwise, keeping the RLP layer and handle, the grouped data of non-concentrated speech business is still handled through the RLP layer when the MAC layer transmits.Here, described call setup message comprises: the beginning exhales, message such as paging, adding group calling.Only exhaling flow process with the beginning of MS initiation in the cdma system below is example, and specifically the processing to the inventive method is illustrated.
Fig. 2 handles a preferred embodiment handling process schematic diagram for removing the RLP layer function in the inventive method call establishment.As shown in Figure 2, its concrete treatment step is as follows:
Step 201: the BSC of caller MS under it sends initial call message.
Step 202: caller MS with and affiliated BSC read SO in this call setup message respectively, and SO is kept at this locality.Here, described call setup message is the described initial call message of step 201.
Step 203: the SO that caller MS and BSC preserve according to step 202 respectively judges whether this calling is concentrated speech business, if, execution in step 204; Otherwise finish to work as pre-treatment.
Here, because the basis for estimation of caller MS and BSC is the SO of same call, so caller MS is necessarily identical with the court verdict that BSC obtains, and is not while execution in step 204, is exactly to finish to work as pre-treatment simultaneously.
Step 204: the RLP layer function that caller MS and BSC remove is respectively separately handled, and finishes to work as pre-treatment.
In the above-mentioned processing procedure, directly removing the RLP layer function for concentrated speech business the inventive method handles, but, consider that some MS or BSC do not support to remove the RLP layer and handle, the inventive method can also adopt negotiation mechanism to remove the RLP layer function and handle, its concrete treatment step as shown in Figure 3:
In Fig. 3, step 301 is identical with step 201 and step 202 shown in Figure 2 with step 302.
Step 303: caller MS judges according to the SO of this calling that step 302 is preserved whether this calling is concentrated speech business, if, execution in step 304; Otherwise finish to work as pre-treatment.
Here, described judgement also can be judged according to the SO of this calling by BSC, also can be judged according to the SO of this calling simultaneously by caller MS and BSC.
Step 304: caller MS and BSC hold consultation, and whether decision removes the RLP layer is handled.
Wherein, described negotiations process can be consulted to ask to BSC specifically for: caller MS sends according to self realization situation, shows that self whether agreeing to remove the RLP layer handles; BSC returns the negotiation response message to caller MS according to the realization situation of self after receiving the request of negotiation, shows the negotiation request of self whether agreeing caller MS.If BSC disagrees with the negotiation request of caller MS, caller MS also might send the request of negotiation once more, shows other suggestions of self; BSC returns the negotiation response message once more then, shows the negotiation request of self whether agreeing this caller MS.
Here, negotiation in the described negotiations process between MS and the BSC can have repeatedly, and the request of negotiation also can be initiated by BSC, return the negotiation response message by caller MS, but specifically can reach an agreement and finish negotiation through consulting the two several times, perhaps initiated to consult request by whom, then need to decide according to MS and BSC specific implementation situation, the present invention does not limit.
Step 305: caller MS and BSC judge respectively whether negotiation result is to remove the RLP layer to handle, if, execution in step 306; Otherwise finish to work as pre-treatment.
Step 306 is identical with step 204 shown in Figure 2.
Because, some MS or BSC may not support to remove the RLP layer function and handle, like this, directly remove the RLP layer handles if do not hold consultation, then this type of MS and BSC will handle and can't use concentrated speech business owing to not supporting to remove the RLP layer, if hold consultation, then when this type of MS or BSC receive require to remove the negotiation request that the RLP layer handles after, will refuse this request, last negotiation result is exactly not remove the RLP layer to handle, thereby this type of MS and BSC still can use concentrated speech business.Therefore, the present invention can adopt negotiation mechanism to remove the RLP layer and handle, and can satisfy the requirement that all kinds of MS and BSC use concentrated speech business, helps the realization of digital cluster system on the existing communication network foundation.
In addition, after caller MS made a call, network can send beep-page message to called MS by the BSC under the called MS, thereby caller MS and called MS being set up call out to be connected converses.When network when called MS is initiated paging, the processing of the processing of the inventive method and above-mentioned calling party MS and BSC is basic identical, only MS and the BSC by the callee judges by the SO in the beep-page message whether this calling is concentrated speech business, thereby whether decision removes the processing of RLP layer function.
When call setup message be beep-page message, when adding group calling message etc., the processing and the said process of the inventive method are basic identical, in a word, setting up at MS and BSC and to call out that MS and BSC adjudicate by the SO in the call setup message whether this calling is concentrated speech business in the signaling process process that is connected, directly or through consultation removing MS and the processing of BSC side business face RLP layer function for concentrated speech business then.
By Fig. 2 and the described processing of Fig. 3 as seen, concentrated speech business is set up and is called out when connecting, in the processing procedure of signaling plane, MS and BSC have removed the RLP layer function of this call business face respectively and have handled, and then the distributed architecture of the service surface protocal layers of MS and BSC both sides concentrated speech business and corresponding relation are as shown in Figure 4.Below in conjunction with Fig. 4 the service surface flow chart of data processing of concentrated speech business is described in detail.The following stated is the processing that the speech data to concentrated speech business carries out.
When MS when BSC transmits voice, being treated to of upstream data:
The high level of MS side obtains the speech sample data of speech data, and the lang sound of going forward side by side coding directly is issued to vocoded data Mux sublayer in the MAC layer without the encapsulation of RLP layer then; The Mux sublayer is multiplexed with vocoded data MuxPDU and MuxPDU is assembled into physics SDU and is issued to the PHY layer; The PHY layer is encoded to physics SDU and is modulated then, and by eating dishes without rice or wine data is sent to the BSS side.Wherein, carrying out when multiplexing, the Mux sublayer directly is filled to vocoded data Primary Traffic or the Secondary Traffic partial data of MuxPDU.
The BTS of BSS side obtains speech data from Reverse Dedicated Traffic Channel to carry out demodulation and is sent to BSC, in the BSC side, and the Mux sublayer that elder generation is decoded and obtains physics SDU and be sent to the MAC layer speech data by the PHY layer; MuxPDU is resolved into the physics SDU that receives in the Mux sublayer, and from MuxPDU, decomposite Primary Traffic or Secondary Traffic partial data is a vocoded data according to the frame format of the channel speed of Reverse Dedicated Traffic Channel and MuxPDU, handle directly this vocoded data is sent to high level then without the RLP layer; High level is formed the vocoded data that receives packet data package and is sent to packet data network.
When BSC when MS transmits voice, being treated to of downlink data:
What the high-rise receiving block data network of BSC side was sent is the packet data package that vocoded data is formed by speech data, extracting grouped data from packet data package is vocoded data, directly grouped data is issued to Mux sublayer in the MAC layer without the encapsulation of RLP layer; The Mux sublayer is multiplexed with MuxPDU with grouped data, and MuxPDU is assembled into physics SDU is issued to the PHY layer; The PHY layer is encoded to physics SDU then, and data are encoded and modulates by BTS, again from the PHY layer of the MS side of eating dishes without rice or wine data are sent to.
The PHY layer of MS side receives the speech data that BSC sends by forward direction shared service channel, decodes and demodulation obtains physics SDU and is sent to the Mux sublayer of MAC layer; MuxPDU is resolved into the physics SDU that receives in the Mux sublayer, and from MuxPDU, decomposite Primary Traffic or Secondary Traffic partial data is a vocoded data according to the frame format of the channel speed of forward direction shared service channel and MuxPDU, handle directly this vocoded data is sent to high level then without the RLP layer; High level directly carries out tone decoding with the vocoded data that receives to be handled.
As seen from the above-described embodiment, use the inventive method, when MS and BSC transmission trunking speech data, in the MAC of MS and BSC layer, the cluster speech data is through after the Mux sub-layer processes, directly being sent to high level without the RLP layer handles, perhaps, the cluster speech data is through after the high level, directly be sent to the Mux sublayer without the RLP layer and handle, so system need not the cluster speech data is carried out complicated rlp frame encapsulation and separates frame and handle, and cancelled the NAK retransmission mechanism of RLP layer for the cluster speech data, thereby reduced the time delay of cluster voice transfer greatly, improved voice quality.
The inventive method can also be applied to CDMA 2000 and CDMA 1X system, and processing method is identical with the above-mentioned processing that is applied to cdma system, is not described further here.
In sum, use the propagation delay time that the inventive method can reduce cluster voice in the digital cluster system greatly, thereby improve speech quality.
Claims (10)
1, the data processing method of medium access control protocol MAC layer in a kind of digital cluster system is characterized in that treatment step is:
A. in the call establishment of concentrated speech business, mobile terminal MS and the radio link protocol RLP layer function that base station controller BSC is removed separately under it are handled;
B. in the voice data transmission process that this concentrated speech business is called out, speech data is handled through multiplexing Mux sublayer in high level, the MAC layer and physics PHY layer in MS and BSC respectively.
2, method according to claim 1 is characterized in that, among the step a, describedly judges that this calls out whether to be the method for concentrated speech business be:
MS and BSC judge according to the business option SO in this call setup message whether this calling is concentrated speech business.
3, method according to claim 1 and 2 is characterized in that, among the step a, described MS and BSC mode through consultation remove the processing of RLP layer function.
4, method according to claim 3 is characterized in that, among the step a, described negotiation mode is:
A1.MS or BSC send the request of negotiation to the other side;
A2.BSC or MS return to the other side and consult to reply.
5, method according to claim 1, it is characterized in that, among the step b, when described speech data transmits in MS, handle through described Mux sublayer and PHY layer successively after high level issues in the uplink voice data, after the downlink voice data are successively through described PHY layer and Mux sub-layer processes, be sent to high level.
6, method according to claim 5, it is characterized in that, among the step b, described up link at MS, the speech sample data of speech data are treated to vocoded data at high level, by the Mux sublayer vocoded data is multiplexed with Mux protocol Data Unit PDU and MuxPDU is assembled into physical traffic data cell SDU again, by the PHY layer physics SDU is encoded at last and modulate.
7, according to claim 5 or 6 described methods, it is characterized in that, among the step b, described down link at MS, speech data is physics SDU at the PHY layer through decoding and being demodulated to, physics SDU is resolved into MuxPDU and be vocoded data by the Mux sublayer, by high level vocoded data is carried out decoding processing at last the MuxPDU demultiplexing.
8, method according to claim 1, it is characterized in that, among the step b, when described speech data transmits in BSC, after the uplink voice data are successively through described PHY layer and Mux sub-layer processes, be sent to high level, after high level issues, handle through described Mux sublayer and PHY layer successively in the downlink voice data.
9, method according to claim 8, it is characterized in that, among the step b, described up link at BSC, speech data is decoded at the PHY layer and is physics SDU, by physics SDU is resolved into MuxPDU and being vocoded data in the Mux sublayer, high-risely vocoded data is formed packet data package mail to packet data network at last the MuxPDU demultiplexing.
10, according to Claim 8 or 9 described methods, it is characterized in that, among the step b, described down link at BSC, the grouped data of being made up of speech data wraps in high level and is broken down into vocoded data, by the Mux sublayer vocoded data is multiplexed with MuxPDU and MuxPDU is assembled into physics SDU again, by the PHY layer physics SDU is encoded at last.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009021373A1 (en) * | 2007-08-16 | 2009-02-19 | Zte Corporation | Implement method of voice forward in digital cluster system |
| CN101141473B (en) * | 2006-09-07 | 2011-08-24 | 杭州华三通信技术有限公司 | Multiplexing transmission apparatus and method between physical layer and media access control layer |
| CN103139716A (en) * | 2011-11-28 | 2013-06-05 | 鼎桥通信技术有限公司 | Implementation method of user plane of voice service in time division long term evolution (TD-LTE) trunked communication system |
| CN109076096A (en) * | 2016-05-13 | 2018-12-21 | 英特尔公司 | MAMP and LWIP enhancing for cascading and dividing |
| CN109729499A (en) * | 2017-10-30 | 2019-05-07 | 成都鼎桥通信技术有限公司 | The voice group call service processing method and system of LTE trunked communication system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6539030B1 (en) * | 2000-02-07 | 2003-03-25 | Qualcomm Incorporated | Method and apparatus for providing configurable layers and protocols in a communications system |
| US6879581B1 (en) * | 2000-08-22 | 2005-04-12 | Qualcomm Incorporated | Method and apparatus for providing real-time packetized voice and data services over a wireless communication network |
| US7453837B2 (en) * | 2002-08-15 | 2008-11-18 | Zteit Usa, Inc. | Trunking system for CDMA wireless communication |
-
2004
- 2004-07-19 CN CNB2004100697695A patent/CN100372397C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101141473B (en) * | 2006-09-07 | 2011-08-24 | 杭州华三通信技术有限公司 | Multiplexing transmission apparatus and method between physical layer and media access control layer |
| WO2009021373A1 (en) * | 2007-08-16 | 2009-02-19 | Zte Corporation | Implement method of voice forward in digital cluster system |
| CN103139716A (en) * | 2011-11-28 | 2013-06-05 | 鼎桥通信技术有限公司 | Implementation method of user plane of voice service in time division long term evolution (TD-LTE) trunked communication system |
| CN103139716B (en) * | 2011-11-28 | 2015-11-25 | 鼎桥通信技术有限公司 | The user face implementation method of speech business in TD-LTE trunked communication system |
| CN109076096A (en) * | 2016-05-13 | 2018-12-21 | 英特尔公司 | MAMP and LWIP enhancing for cascading and dividing |
| CN109076096B (en) * | 2016-05-13 | 2021-09-07 | 苹果公司 | Apparatus for wireless device |
| CN109729499A (en) * | 2017-10-30 | 2019-05-07 | 成都鼎桥通信技术有限公司 | The voice group call service processing method and system of LTE trunked communication system |
| CN109729499B (en) * | 2017-10-30 | 2021-01-26 | 成都鼎桥通信技术有限公司 | Voice group call processing method and system of LTE cluster communication system |
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