CN1753352A - Receiving method of backward packet data channel in CDMA system - Google Patents
Receiving method of backward packet data channel in CDMA system Download PDFInfo
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- CN1753352A CN1753352A CN 200410051678 CN200410051678A CN1753352A CN 1753352 A CN1753352 A CN 1753352A CN 200410051678 CN200410051678 CN 200410051678 CN 200410051678 A CN200410051678 A CN 200410051678A CN 1753352 A CN1753352 A CN 1753352A
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Abstract
This invention discloses a method for receiving reversal packet data channels for the CDMA system including the following steps: 1, the base station demodulates sub-code packets when the mobile station effectively pilots corresponding to the sending-receiving unit of the base station, 2, the reversal packet data channel receiver of the base station sending-receiving unit carries out additional merge to the sub-code packets demodulated locally and by other base station sending-receiving units and corresponding to a same packet to decode the generated encode packets to get the packets sent by the mobile station on the reversal channel packet data channels.
Description
Technical field
The present invention relates to CDMA (code division multiple access) field of mobile communication, relate in particular to CDMA 1XEV-DV (data and voice that 1 carrier wave strengthens) system, under soft changing state, improve the base station receiving mobile is gone up the grouping packet success rate that sends in reverse packet data channel (Reverse Packet Data Channel) method.
Background technology
CDMA 1XEV-DV system is the updating apparatus of CDMA 1X system, can provide the voice-and-data business simultaneously at same carrier frequency, on the basis of complete compatible CDMA 1X function, oppositely wireless data transmission rate reaches as high as ' 1.8Mbps/ travelling carriage ' in theory, this reverse packet data channel that mainly has benefited from increasing newly in the CDMA 1XEV-DV system has adopted the more modulation technique of high spectrum utilization, again by with the forward direction acknowledgement channel, the forward direction authorization channel, reverse Auxiliary Pilot Channel, being used of reverse request channel and reverse packet data control channel, realize that HARQ (hybrid-type request-affirmation) and AMC transmission qualities such as (codings that adapts to control automatically) strengthens mechanism, makes CDMA 1XEV-DV system can adapt to the running environment of various complexity.
Because the complexity of wireless transmission environment, the base station can not guarantee once can correctly receive the grouping bag that reverse packet data channel sends, the situation that coding groups bag that sub-coding groups bag that the base station demodulation comes out generated can't be correctly decoded can occur, travelling carriage just must wrap this grouping and retransmit this moment.Working mechanism based on HARQ, the base station can simply not abandon the sub-coding groups bag that can't be correctly decoded originally, but remain, behind the sub-coding groups bag that demodulates the travelling carriage repeating transmission, merging (Chase Combining) operation will be appended to the sub-coding groups bag and the up-to-date sub-coding groups bag that receives that can't be correctly decoded originally in the base station, generate new coding groups bag.This sub-coding groups inclusion that is received for twice by front and back and the method that generates the coding groups bag are better than the coding groups bag of each self-generating of sub-coding groups bag of receiving for twice.But, relatively poor or delivery flow rate had relatively high expectations etc. under the situation at condition of acceptance, the sub-coding groups bag that still can't utilize base station transceiver to receive to a greater extent can not be given full play to the effect that receives operation gained achievement each time and further improve the base station receiving success rate.Especially travelling carriage is in soft changing state, and the base station has a plurality of transceivers to receive the situation that reverse packet data channel sends the grouping bag simultaneously.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of base station receiving mobile is gone up the grouping bag that sends in reverse packet data channel (Reverse Packet Data Channel) method, solved when travelling carriage is in soft changing state, the reception success rate is low, cause a large amount of packet retransmission bags of travelling carriage, influence the problem of reverse packet data channel data transfer throughput.
System involved in the present invention comprises: have the base station controller of selecting Dispatching Unit, many stylobates station transceiver, the travelling carriage that has Packet Data Channel controlled function unit and reverse packet data channel receiver.
The present invention includes following steps:
101, tune coding groups bag is separated in the base station in the current active set pilot tone of travelling carriage respective base station transceiver;
102, base station transceiver reverse packet data channel receiver appends merging with local demodulation with the sub-coding groups bags corresponding to same grouping bag other base station transceiver demodulation, the coding groups bag that generates is decoded, obtain the grouping bag that travelling carriage sends on the backward channel Packet Data Channel.
Above-mentioned steps 101 further comprises:
201, reverse packet data channel is being distributed for travelling carriage in the base station;
202, in the current active set pilot tone of travelling carriage respective base station transceiver, create reverse packet data channel receiver and Packet Data Channel controlled function unit;
203, travelling carriage sends the grouping bag on reverse packet data channel.
In the above-mentioned steps 102, base station transceiver reverse packet data channel receiver carries out appends merging, can also comprise that the reverse packet data channel receiver will demodulate sub-coding groups bag and append merging with all the sub-coding groups bags corresponding to same grouping bag that obtain before from the reverse packet data channel signal.
In the above-mentioned steps 102 the coding groups bag that generates is decoded, obtain the grouping bag that travelling carriage sends on the backward channel Packet Data Channel, can comprise:
301, judge whether the decoding of reverse packet data channel receiver is correct, if correct, then:
302, the reverse packet data channel receiver grouping bag that generates of will decoding sends to Packet Data Channel controlled function unit;
303, after Packet Data Channel controlled function unit receives the grouping bag that the reverse packet data channel receiver sends, will confirm that by the forward direction acknowledgement channel indication sends to travelling carriage, and will divide into groups to wrap and send to the selection Dispatching Unit;
304, after the selection Dispatching Unit received the grouping bag of Packet Data Channel controlled function unit transmission, the bag that should divide into groups sent to the Packet Control Function unit, finishes the reception of reverse packet data channel.
In the above-mentioned steps 102 the coding groups bag that generates is decoded, obtain the grouping bag that travelling carriage sends on the backward channel Packet Data Channel, can also comprise:
401, judge whether the decoding of reverse packet data channel receiver is correct, if mistake, then:
402, the reverse packet data channel receiver will rigidly connect the sub-coding groups bag of receiving and send to Packet Data Channel controlled function unit;
403, after Packet Data Channel controlled function unit received the sub-coding groups bag that the reverse packet data channel receiver sends, Packet Data Channel controlled function unit sent to the selection Dispatching Unit with bundle coding groups bag;
405, after the selection Dispatching Unit receives the sub-coding groups bag of Packet Data Channel controlled function unit transmission, if receiving, corresponding grouping bag makes mistakes, select Dispatching Unit will send to the sub-coding groups bag that receives the Packet Data Channel controlled function unit of all travelling carriage active set pilot tone respective base station transceivers, send except the Packet Data Channel controlled function unit of this sub-coding groups bag;
406, after Packet Data Channel controlled function unit receives the sub-coding groups bag of selecting the Dispatching Unit transmission, contract out mistake, then sub-coding groups bag is sent to the reverse packet data channel receiver if receive grouping; Laterally merge
407, after the reverse packet data channel receiver receives the sub-coding groups bag of Packet Data Channel controlled function unit transmission, to append merging with sub-coding groups bag and all sub-coding groups bags that obtain before corresponding to same grouping bag, the result who appends merging is used to generate the coding groups bag, if this coding groups bag can be correctly decoded, then the reverse packet data channel receiver grouping bag that generates of will decoding sends to Packet Data Channel controlled function unit;
408, after Packet Data Channel controlled function unit receives the grouping bag that the reverse packet data channel receiver sends, will confirm that by the forward direction acknowledgement channel indication sends to travelling carriage, and will divide into groups to wrap and send to the selection Dispatching Unit;
409, after the selection Dispatching Unit received the grouping bag of Packet Data Channel controlled function unit transmission, the bag that should divide into groups sent to the Packet Control Function unit, finishes the reception of reverse packet data channel.
Present invention is directed at travelling carriage in soft changing state, there is the situation of a plurality of base station transceivers while receiving mobiles at the grouping bag of reverse packet data channel transmission the base station, propose to make each base station transceiver can both obtain all sub-coding groups bags that are directed to same grouping bag that other base station transceivers receive, and appended the method for merging separately.Signal for the travelling carriage transmission, each base station transceiver is because the independence on space and the equipment, the sub-coding groups bag that the demodulation of different base station transceiver is come out will have less correlation, make appending to merge and have good error correction effect between the sub-coding groups bag that the different base station transceiver receives, improve travelling carriage under soft changing state, the base station receives the success rate of reverse packet data channel grouping bag, reduce the probability of travelling carriage packet retransmission bag, thereby improve the reverse packet data channel data transfer throughput.
Description of drawings
Fig. 1 is that the function that the CDMA 1XEV-DV base station system that the present invention relates to receives reverse packet data channel realizes schematic diagram;
Fig. 2 is the flow chart that the reverse packet data channel receiver receives reverse packet data channel grouping bag in the inventive method;
Fig. 3 is the flow chart that Packet Data Channel controlled function unit receives reverse packet data channel grouping bag in the inventive method;
Fig. 4 selects Dispatching Unit to receive the flow chart of reverse packet data channel grouping bag in the inventive method.
Embodiment
In CDMA 1XEV-DV system, reverse packet data channel is travelling carriage sends a passage from HRPD (high rate packet data) to the base station, in order to realize the high speed data transfer flow, reverse packet data channel has adopted the method for appending merging, both the base station merged the sub-coding groups bag that may have error code that all receive, to append the coding groups bag that merges the back generation again and be used for decoding, this method of appending merging can both contribute the achievement that receives the grouping bag each time of base station to last being correctly decoded, thereby reduces the probability of travelling carriage packet retransmission bag.Travelling carriage is under soft changing state, the grouping bag that has a plurality of base station transceivers while receiving mobiles to send by reverse packet data channel, method based on the present invention's proposition, be exactly that a plurality of sub-coding groups bag at same grouping bag that not only base station transceiver self is received appends merging, also all sub-coding groups bags at same grouping bag that other base station transceivers receive to be appended merging, improve the purpose that the grouping bag receives success rate to reach.
The function that CDMA 1XEV-DV base station system involved in the present invention receives reverse packet data channel realizes that as shown in Figure 1 this system comprises: have the base station controller of selecting Dispatching Unit, many stylobates station transceiver, the travelling carriage that has Packet Data Channel controlled function unit and reverse packet data channel receiver.The signal that described reverse packet data channel receiver demodulation travelling carriage sends on the reverse packet data control channel, demodulation reverse packet data channel signal obtains sub-coding groups bag, also can obtain the sub-coding groups bag that other base station transceiver demodulation are come out by Packet Data Channel controlled function unit.Described reverse packet data channel receiver appends union operation with the sub-coding groups bag of up-to-date acquisition and all sub-coding groups bags at same grouping bag that obtain before, carry out decode operation with the coding groups bag that generates again, if can be correctly decoded, the bag that then will divide into groups sends to Packet Data Channel controlled function unit, otherwise the sub-coding groups bag of up-to-date demodulation gained is sent to Packet Data Channel controlled function unit.The transmission operation of packet is responsible for carrying out in described Packet Data Channel controlled function unit between selection Dispatching Unit and reverse packet data channel receiver, and returns the affirmation indication by the forward direction acknowledgement channel to travelling carriage after the reverse packet data channel receiver successfully receives the grouping bag.Described selection Dispatching Unit mainly plays the effect that receives the grouping bag and distribute sub-coding groups bag.
In the base station is after travelling carriage has been assigned reverse packet data channel, to in the current active set pilot tone of travelling carriage respective base station transceiver, create reverse packet data channel receiver and Packet Data Channel controlled function unit, travelling carriage can send the grouping bag on reverse packet data channel, the identical period on the reverse packet data control channel sends the relevant information of the bag that divides into groups simultaneously, and these relevant informations comprise: the size of grouping bag, sub-coding groups bag sign and the indication of enhancing quality.The base station will receive the grouping bag that this travelling carriage sends at the current active set pilot tone of travelling carriage respective base station transceiver on reverse packet data channel, the relevant information of grouping bag is then obtained from the reverse packet data control channel, regulation according to agreement, travelling carriage can be done 6 side's soft handovers at most, therefore in the active set of travelling carriage 6 pilot tones can be arranged at most, therefore be directed to certain travelling carriage, may have 6 base station transceivers at most and receive the grouping bag that it sends simultaneously on reverse packet data channel.Travelling carriage is in activation, various forms of change actions may take place, pilot tone in the active set is changed, the base station will be according to the situation of change of travelling carriage active set, in time adjust the setting of each base station transceiver, comprising: create reverse packet data channel receiver and Packet Data Channel controlled function unit at newly-increased effective pilot tone respective base station transceiver; The reverse packet data channel receiver and the Packet Data Channel controlled function unit that withdraw from the pilot tone respective base station transceiver of active set are closed, and target is exactly to guarantee all to create in the base station transceiver of the current active set pilot tone of travelling carriage correspondence reverse packet data channel receiver and the Packet Data Channel controlled function unit that receives this travelling carriage reverse packet data channel.
In the inventive method, the flow process of the grouping bag that reverse packet data channel receiver receiving mobile sends on reverse packet data channel as shown in Figure 2.
After the reverse packet data channel receiver is created, the reverse packet data control channel signals that the demodulation travelling carriage sends will be continued, step 201, in case detect travelling carriage sends the grouping bag on the reverse packet data control channel relevant information, step 202, at first detect sub-coding groups bag sign, step 212, if this parameter is 0, show that then send the first time that travelling carriage is newly dividing into groups to wrap, be that the sub-coding groups bag that the reverse packet data channel receiver is preserved before newly divides into groups to wrap irrelevant therewith, the reverse packet data channel receiver will all be deleted the sub-coding groups bag of preserving before, step 214, and then the reverse packet data channel signal of corresponding period carried out demodulation, step 213, the sub-coding groups bag that obtains after the demodulation will append union operation with all sub-coding groups bags corresponding to the current transmission grouping of travelling carriage bag that obtain before, step 205 is appended the coding groups bag that obtains behind the union operation and is carried out decode operation, step 206.If decoding gained grouping bag can be by verification, step 207 shows then and decodes successfully that the error rate of the current coding groups bag that obtains has been lower than the decodable code threshold value, the reverse packet data channel receiver will send to Packet Data Channel controlled function unit, step 211 to the grouping bag; If decoding gained grouping bag can't be by verification, step 207, then show the decoding failure, the error rate that shows the current coding groups bag that obtains so also is higher than the decodable code threshold value, also need more sub-coding groups bag to participate in appending merging, the reverse packet data channel receiver will send to Packet Data Channel controlled function unit, step 209, step 210 to the sub-coding groups bag of up-to-date demodulation.
If the reverse packet data channel receiver is received the sub-coding groups bag that Packet Data Channel controlled function unit sends, step 203, the sub-coding groups bag that then will just obtain appends union operation with the sub-coding groups bag that all that obtain are before wrapped corresponding to the current transmission grouping of travelling carriage, step 204, step 205, append the coding groups bag that merges the back acquisition and will carry out decode operation, step 206, if decoding gained grouping bag can be by verification, step 207, then will divide into groups to wrap and send to Packet Data Channel controlled function unit, step 211.
No matter be the sub-coding groups bag of demodulation gained, or the sub-coding groups bag that sends from Packet Data Channel controlled function unit, the reverse packet data channel receiver all can preserve step 208, be used for the follow-up union operation that appends, until the receiving course end of respective packets bag.
In the bright method of this law, the flow process of Packet Data Channel controlled function unit reception reverse packet data channel grouping bag as shown in Figure 3, Packet Data Channel controlled function unit will continue from the reverse packet data channel receiver and select Dispatching Unit to receive packet, step 301.
If Packet Data Channel controlled function unit receives the grouping bag from the reverse packet data channel receiver, step 302, step 303, show that then the reverse packet data channel receiver has successfully received the grouping bag that travelling carriage sends, Packet Data Channel controlled function unit will send to travelling carriage by the forward direction acknowledgement channel confirms indication, step 304, and the bag that will divide into groups sends to selection Dispatching Unit, step 305.
If Packet Data Channel controlled function unit receives sub-coding groups bag from the reverse packet data channel receiver, step 302, step 303, rather than from selecting Dispatching Unit to receive, step 306, show that then the reverse packet data channel receiver also can't be correctly decoded the coding groups bag, Packet Data Channel controlled function unit sends to selection Dispatching Unit, step 307 with bundle coding groups bag.
If Packet Data Channel controlled function unit receives sub-coding groups bag from selecting Dispatching Unit, step 302, step 303, step 306, judge then whether this base station transceiver has correctly received the grouping bag, step 308, if also correctly do not receive the grouping bag, then Packet Data Channel controlled function unit sends to the reverse packet data channel receiver with bundle coding groups bag, step 309, if this base station transceiver has correctly received the grouping bag, then sub-coding groups bag is abandoned step 310.
In the inventive method, the flow process of selection Dispatching Unit reception reverse packet data channel grouping bag as shown in Figure 4, if select Dispatching Unit to receive the grouping bag that Packet Data Channel controlled function unit sends, step 401, step 402, step 403, then will divide into groups to wrap and send to Packet Control Function unit PCF, step (packetcontrol function) is carried out subsequent treatment, step 404.
If select Dispatching Unit to receive the sub-coding groups bag that Packet Data Channel controlled function unit sends, step 401, step 402, step 403, and judge that the pairing grouping bag of this sub-coding groups bag is successfully received, step 405, then abandon this sub-coding groups bag, step 407, and continue follow-up reception flow process, otherwise bundle coding groups bag is sent to the Packet Data Channel controlled function unit of the current active set pilot tone of all travelling carriages respective base station transceiver, step 406 sends except the Packet Data Channel controlled function unit of this sub-coding groups bag.
The inventive method mainly be at travelling carriage under soft changing state, there is the situation of a plurality of base station transceivers while receiving mobiles at the grouping bag of reverse packet data channel transmission the base station, the sub-coding groups bag that utilizes base station transceiver to receive to a greater extent reaches and improves the purpose that the base station receives success rate.It is relatively poor or to delivery flow rate situation such as have relatively high expectations that the present invention is mainly used in condition of acceptance.In order to improve the success rate that the base station receives reverse packet data channel grouping bag, also can be during sending the grouping bag on the reverse packet data channel at travelling carriage, suitably reduce the threshold that travelling carriage carries out soft handover, make the easier soft changing state that enters of travelling carriage, after the grouping bag is sent completely, recover normal state again.
In addition, method proposed by the invention is not only applicable to CDMA2000 1XEV-DV system, for carrying out the system that signal receives with appending the merging method, can be adopted as the case may be.
Claims (5)
1, the method for reseptance of reverse packet data channel in a kind of code division multiple access system, related system comprises: have the base station controller of selecting Dispatching Unit, many stylobates station transceiver, the travelling carriage that has Packet Data Channel controlled function unit and reverse packet data channel receiver, it is characterized in that, comprise the steps:
101, tune coding groups bag is separated in the base station in the current active set pilot tone of travelling carriage respective base station transceiver;
102, base station transceiver reverse packet data channel receiver appends merging with local demodulation with the sub-coding groups bags corresponding to same grouping bag other base station transceiver demodulation, the coding groups bag that generates is decoded, obtain the grouping bag that travelling carriage sends on the backward channel Packet Data Channel.
2, method according to claim 1 is characterized in that, described step 101 further comprises:
201, reverse packet data channel is being distributed for travelling carriage in the base station;
202, in the current active set pilot tone of travelling carriage respective base station transceiver, create reverse packet data channel receiver and Packet Data Channel controlled function unit;
203, travelling carriage sends the grouping bag on reverse packet data channel.
3, method according to claim 1, it is characterized in that, in the described step 102, base station transceiver reverse packet data channel receiver carries out appends merging, can also comprise that the reverse packet data channel receiver will demodulate sub-coding groups bag and append merging with all the sub-coding groups bags corresponding to same grouping bag that obtain before from the reverse packet data channel signal.
4, according to claim 1 or 3 described methods, it is characterized in that, in the described step 102 the coding groups bag that generates decoded, obtain the grouping bag that travelling carriage sends on the backward channel Packet Data Channel, specifically comprise:
301, judge whether the decoding of reverse packet data channel receiver is correct, if correct, then:
302, the reverse packet data channel receiver grouping bag that generates of will decoding sends to Packet Data Channel controlled function unit;
303, after Packet Data Channel controlled function unit receives the grouping bag that the reverse packet data channel receiver sends, will confirm that by the forward direction acknowledgement channel indication sends to travelling carriage, and will divide into groups to wrap and send to the selection Dispatching Unit;
304, after the selection Dispatching Unit received the grouping bag of Packet Data Channel controlled function unit transmission, the bag that should divide into groups sent to the Packet Control Function unit, finishes the reception of reverse packet data channel.
5, according to claim 1 or 3 described methods, it is characterized in that, in the described step 102 the coding groups bag that generates decoded, obtain the grouping bag that travelling carriage sends on the backward channel Packet Data Channel,
Specifically comprise:
401, judge whether the decoding of reverse packet data channel receiver is correct, if mistake, then:
402, the reverse packet data channel receiver will rigidly connect the sub-coding groups bag of receiving and send to Packet Data Channel controlled function unit;
403, after Packet Data Channel controlled function unit received the sub-coding groups bag that the reverse packet data channel receiver sends, Packet Data Channel controlled function unit sent to the selection Dispatching Unit with bundle coding groups bag;
405, after the selection Dispatching Unit receives the sub-coding groups bag of Packet Data Channel controlled function unit transmission, if receiving, corresponding grouping bag makes mistakes, select Dispatching Unit will send to the sub-coding groups bag that receives the Packet Data Channel controlled function unit of all travelling carriage active set pilot tone respective base station transceivers, send except the Packet Data Channel controlled function unit of this sub-coding groups bag;
406, after Packet Data Channel controlled function unit receives the sub-coding groups bag of selecting the Dispatching Unit transmission, contract out mistake, then sub-coding groups bag is sent to the reverse packet data channel receiver if receive grouping; Laterally merge
407, after the reverse packet data channel receiver receives the sub-coding groups bag of Packet Data Channel controlled function unit transmission, to append merging with sub-coding groups bag and all sub-coding groups bags that obtain before corresponding to same grouping bag, the result who appends merging is used to generate the coding groups bag, if this coding groups bag can be correctly decoded, then the reverse packet data channel receiver grouping bag that generates of will decoding sends to Packet Data Channel controlled function unit;
408, after Packet Data Channel controlled function unit receives the grouping bag that the reverse packet data channel receiver sends, will confirm that by the forward direction acknowledgement channel indication sends to travelling carriage, and will divide into groups to wrap and send to the selection Dispatching Unit;
409, after the selection Dispatching Unit received the grouping bag of Packet Data Channel controlled function unit transmission, the bag that should divide into groups sent to the Packet Control Function unit, finishes the reception of reverse packet data channel.
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| CNB2004100516789A CN100382477C (en) | 2004-09-22 | 2004-09-22 | Receiving method of backward packet data channel in CDMA system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100456746C (en) * | 2006-07-26 | 2009-01-28 | 华为技术有限公司 | Method for backward realizing private line user mechanism in communication system |
| CN101060721B (en) * | 2007-06-18 | 2010-08-25 | 华为技术有限公司 | A method and system and device for realizing the reverse dedicated line user mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7936728B2 (en) * | 1997-12-17 | 2011-05-03 | Tantivy Communications, Inc. | System and method for maintaining timing of synchronization messages over a reverse link of a CDMA wireless communication system |
| JP3507809B2 (en) * | 2000-04-10 | 2004-03-15 | ヒュンダイ エレクトロニクス インダストリーズ カムパニー リミテッド | Data transmission method for hybrid automatic retransmission request 2/3 scheme in uplink of broadband wireless communication system |
| JP2006512870A (en) * | 2002-12-30 | 2006-04-13 | エスケーテレコム カンパニー リミテッド | Method and system for notifying a 1xEV-DO system of a switch from a 1xEV-DO system to a 1X system |
| CN1277361C (en) * | 2003-10-11 | 2006-09-27 | 中兴通讯股份有限公司 | Method for receiving mobile station reverse channel quality indicating channel of CDMA base station |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100456746C (en) * | 2006-07-26 | 2009-01-28 | 华为技术有限公司 | Method for backward realizing private line user mechanism in communication system |
| CN101060721B (en) * | 2007-06-18 | 2010-08-25 | 华为技术有限公司 | A method and system and device for realizing the reverse dedicated line user mechanism |
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