CN1889379A - Method for regulating inversed business channel power - Google Patents
Method for regulating inversed business channel power Download PDFInfo
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- CN1889379A CN1889379A CN 200610098899 CN200610098899A CN1889379A CN 1889379 A CN1889379 A CN 1889379A CN 200610098899 CN200610098899 CN 200610098899 CN 200610098899 A CN200610098899 A CN 200610098899A CN 1889379 A CN1889379 A CN 1889379A
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Abstract
This invention discloses a method for adjusting reverse service channel power including the following steps: A, an access terminal sends reverse data packets to the network side, which decodes them to record the decoded sub-packet number N if the decoding is successful and enquires to get the corresponding terminal target based on the transmission mode and sizes of the decoded reverse data packets, B, comparing the numbers of the terminated target and the sub-packet to determine the T2P of the adjusted service channel to the reverse pilot frequency to be sent to the access terminal, C, the access terminal adjusts the transmission power of the reverse data packets corresponding to the transmission mode and packet size based on the T2P.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly a kind of method of adjusting inversed business channel power.
Background technology
Code division multiple access (Code Division Multiple Access, CDMA) the new types of data business of 2000 systems (Evolution Data Optimized, EV-DO) in initial Rev 0 version, (Access Terminal accesses terminal, AT) to base station (Base Transceiver Station, BTS) reverse data of Fa Songing mode frame by frame sends, and the shared duration of each frame is 26.67ms.In at present up-to-date Rev A version, in order to improve reverse rate, each reverse data bag (Packet) is divided into 4 son bags, the corresponding subframe of each son bag, and subframe alternately sends.
Figure 1 shows that EV-DO Rev 0 version and Rev A send the schematic diagram of reverse data bag.Be provided with three packets, promptly wrap A, bag B and bag C, in Rev 0 version, these three packets are sent successively; And in Rev A version, each bag is divided into 4 son bags respectively, in Fig. 1, represent with subscript 0～3 respectively, and during transmission, also be to send earlier first son bag successively, promptly be designated as 0 child bag A down
0, B
0, C
0, send second son bag more successively and promptly be designated as 1 child bag down also the rest may be inferred.Wherein first son bag carried all effective informations of former packet and the redundant information that part is used to decode, and other 3 packets all carry the redundant information that helps decoding; Simultaneously, have three numbers of interweaving to be respectively 0,1,2 three and interweave, these three interweave and are used to send the child bag that adheres to three different reverse data bags separately.All son bags of a reverse data bag are by the identical interleaved transmission of the number of interweaving.The variation of the wireless channel between the base station is very violent owing to access terminal, on the base station, for each packet, might receive that first son bag just can successfully decode, also might receive second, third, could decode successfully behind the 4th son bag, even finally all not decode successfully.If decode successfully after receiving the first son bag in the base station, so can by by the base station to the feed-forward that accesses terminal send no response (NegativeAcknowledgment, NAK) message is to being accessed terminal, allowing accesses terminal sends out second sub bag again; If the base station is receiving that the first son bag back decode successfully, can send out correctly by feed-forward so and reply (Acknowledgment, ACK) message is to being accessed terminal, and accessing terminal begins new packet of the first Zi Bao place interleaved transmission, and the rest may be inferred.The send mode of this reverse data bag of Rev A version can be realized the oppositely premature termination of transmission, improves reverse throughput.
EVDO Rev 0 system uses closed power control mode as shown in Figure 2, and wherein thick arrow is the reverse traffic bag, and thin arrow is the power control signaling.BTS 202 and base station controller (Base SiteController, BSC) external circule power control between 203 is: Packet Error Ratio (the Packet Error Ratio that BSC 203 detects from the reverse traffic bag of BTS 202, PER), and the PER that detected and default target P ER compared, adjust the bit energy of target reverse data channel (Reverse DataChannel) and the ratio Eb/Nt of effective noise spectrum density according to comparative result, and adjusted Eb/Nt sent to BTS 202, BTS 202 upgrades the target Eb/Nt that self stores according to the Eb/Nt that is received; Inner-loop power control between AT 201 and the BTS 202 is: the Eb/Nt that BTS 202 detects from the reverse traffic channel of AT 201, and Eb/Nt and the target Eb/Nt that is detected compared, send reverse power control (Reverse Power Control according to result relatively to AT 201, RPC) information, AT201 adjusts the power of Reverse Pilot Channel according to the RPC information of being received, and then influences the power of reverse traffic channel.
The reverse traffic channel of CDMA2000 EVDO Rev A system is supported two kinds of PTM Packet Transfer Modes, promptly be used for low professional high power capacity (the High Capacity of delay requirement, HC) pattern and low delay (the Low Latency that is used for the higher business of delay requirement, LL) pattern, every kind of pattern has disposed corresponding bag size (Packet Size respectively, PS), stop target (Termination Target, TT) and Traffic Channel with respect to power ratio (the Traffic to Pilot of reverse pilot, T2P), wherein TT is meant the maximum that the required son of successfully decoding wraps number.CDMA2000 EVDO RevA system supports service quality (the Quality of Service based on different business, QoS), the business of different QoS has different delay requirements, in the TT difference of reverse data bag of oppositely eating dishes without rice or wine just to be embodied in: the TT of HC pattern is 4 son bags, and the TT of LL pattern is 3 son bags.The reverse power control flow process of EVDO Rev A system and the basically identical of EVDO Rev0 system just when BSC 203 detects PER, are judged the demand of considering time delay that goes up to good rascal, end target also as the Rule of judgment of good rascal with whether reaching.If the sub-Bale No. of the reverse data bag that decoding is successful then also is considered as rascal greater than stopping target, promotes target Eb/Nt, and then promote the power of pilot tone.Not only guarantee the PER requirement by reverse power control like this, also guaranteed professional delay requirement.
Because two kinds of data packet transmission modes coexist in the Rev A pattern, there is following shortcoming in the mode of present reverse power control:
1, the way of backward power adjustment is the unified power that promotes pilot tone, thereby has improved the power of all bags indirectly, and in fact may have only the packets need bring to power of LL pattern, so just causes the waste of HC mode data bag backward power;
2, replace under the situation about sending in HC pattern and LL mode back packet, LL mode data bag promotes inversed business channel power, and HC mode data bag has subsequently reduced power, causes and unnecessarily frequently carries out the inversed business channel power adjustment.
Summary of the invention
In view of this, the objective of the invention is to, propose a kind of method of adjusting inversed business channel power, can both satisfy the delay requirement of LL pattern bag, also can not cause the power dissipation of HC pattern bag.This method comprises the steps:
A, accessing terminal sends the reverse data bag to network side, network side is decoded to the reverse data bag that is received, carrying recorded decoding then goes out the sub-Bale No. N of packet if decode successfully, and the transmission mode and the bag size of the reverse data bag of decoding according to described success are inquired about the termination target that obtaining correspondence;
B, relatively stop the size of target and sub-Bale No. N, determine to adjust the power ratio T2P of Traffic Channel, and the value of adjusted T2P is sent to accesses terminal with respect to reverse pilot according to comparative result;
C, access terminal and adjust the transmitted power of the reverse data bag of described transmission mode and bag size correspondence according to the value of the T2P that is received.
Network side sets in advance transmission mode and bag size and the mapping relations table that stops target, and then the described network side of steps A according to transmission mode and the corresponding termination target of bag size inquiry is: network side is inquired about the termination target that described mapping relations table obtains correspondence according to transmission mode and bag size.
Step B is described to determine that according to comparative result T2P comprises: establish delta=and stop target-N, if delta＞0 then reduces T2P, the amplitude of reduction is directly proportional with the delta absolute value; If delta＜0, the T2P that then raises, the amplitude of rising is directly proportional with the delta absolute value; If delta=0 does not then adjust T2P.
The described value of step B with adjusted T2P be sent to access terminal for: send the General attribute update protocol GAUP message comprise adjusted T2P to accessing terminal.
This method further comprises:
The number of rascal appears in C, network side record, and judge whether the number that up to the present last calculating Packet Error Ratio PER receives the reverse data bag has reached predetermined value, if, then calculated the number that up to the present PER receive rascal in the reverse data bag last time and calculate the sum that up to the present PER receives the reverse data bag divided by the last time, obtain PER, and continue execution in step D, otherwise go to steps A;
D, network side compare the PER that calculates and the target P ER of self storage, adjust the value of target bits energy and the ratio Eb/Nt of effective noise spectrum density according to comparative result, and the target Eb/Nt that is stored with adjusted target Eb/Nt renewal.
Described the accessing terminal of steps A further comprises to network side transmission reverse data bag:
A1, accessing terminal sends the reverse data bag by backward channel to the base station, and the Eb/Nt of described backward channel is detected in the base station;
A2, base station compare the value of Eb/Nt that is detected and the target Eb/Nt that self stores, and change the reverse power control channel RPC bit that is used to adjust Reverse Pilot Channel power according to comparative result;
A3, access terminal and adjust Reverse Pilot Channel power, and send the reverse data bag to the base station according to the RPC bit that received.
As can be seen from the above technical solutions, the present invention searches corresponding termination target according to the transformat and the bag size of reverse data bag, and whether the sub-Bale No. when successfully decoding satisfies and stops target, reverse data bag to specific transformat and bag size is adjusted, and to other reverse data bags without any influence, so just can accurately guarantee the reverse data packet delay requirement of difference " transmission mode+bag size ", and then satisfied the professional time delay of oppositely eating dishes without rice or wine, also avoided unnecessarily frequently carrying out simultaneously the inversed business channel power adjustment.
Description of drawings
Fig. 1 is the schematic diagram that CDMA2000 EVDO Rev 0 version and Rev A version send the reverse data bag;
Fig. 2 is the schematic diagram that CDMA2000 EVDO Rev 0 version is realized reverse power control;
Fig. 3 realizes the schematic diagram of reverse power control for the present invention;
Fig. 4 realizes the flow chart of interior ring reverse power control for the embodiment of the invention;
Fig. 5 realizes the flow chart of outer shroud reverse power control for the embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is further elaborated below in conjunction with accompanying drawing.
Owing in CDMA2000 EVDO Rev A version, have two kinds of transmission mode: LL and HC, and multiple PS is arranged again under each transmission mode, table 1 is depicted as the corresponding relation of transmission mode, PS and the T2P of existing protocol C.S0024A2.0 regulation, wherein be meant before the conversion and stop referring to after the conversion stop after the target before the target.As can be seen from Table 1, for the combination of each specific transmission mode and PS, corresponding specific T2P; And in fact each specific transmission mode and the also corresponding specific TT of the combination of PS.Therefore core content of the present invention is exactly the packet of decoding for success, according to its specific transmission mode and the corresponding TT of PS inquiry, and adjusts its T2P in view of the above.
| Physical layer packet size (bit) | Transmission mode | Before T2P (0.25 decibel) conversion | After T2P (0.25 decibel) conversion |
| 128 | High power capacity | 0x03 | 0x03 |
| 128 | The low delay | 0x0D | 0x03 |
| 256 | High power capacity | 0x0F | 0x0F |
| 256 | The low delay | 0x1A | 0x0F |
| 512 | High power capacity | 0x1C | 0x1C |
| 512 | The low delay | 0x26 | 0x1C |
| 768 | High power capacity | 0x23 | 0x23 |
| 768 | The low delay | 0x2E | 0x23 |
| 1024 | High power capacity | 0x28 | 0x28 |
| 1024 | The low delay | 0x32 | 0x28 |
| 1536 | High power capacity | 0x2E | 0x2E |
| 1536 | The low delay | 0x38 | 0x2E |
| 2048 | High power capacity | 0x34 | 0x34 |
| 2048 | The low delay | 0x3E | 0x34 |
| 3072 | High power capacity | 0x39 | 0x39 |
| 3072 | The low delay | 0x41 | 0x39 |
| 4096 | High power capacity | 0x3E | 0x3E |
| 4096 | The low delay | 0x46 | 0x3E |
| 6144 | High power capacity | 0x44 | 0x44 |
| 6144 | The low delay | 0x4C | 0x44 |
| 8192 | High power capacity | 0x4A | 0x4A |
| 8192 | The low delay | 0x5D | 0x4A |
| 12288 | High power capacity | 0x55 | 0x55 |
| 12288 | The low delay | 0x69 | 0x55 |
| 128 | High power capacity | 0x03 | 0x03 |
Table 1
The schematic diagram that inversed business channel power is adjusted in the realization of the inventive method as shown in Figure 3, the present invention program has kept the reverse power control algorithm identical with EVDO Rev0 version; On this basis, increased the processing procedure of judging and then adjust reverse data bag power according to TT.The present invention realizes that the entire flow of adjusting inversed business channel power comprises inner-loop power control flow process and external circule power control flow process.Wherein, inner-loop power control is identical with the inner-loop power control of prior art Rev 0, as shown in Figure 4, comprises the steps:
Step 401:AT sends the reverse data bag to BTS, and BTS detects the Eb/Nt of the reverse data bag that is received;
Step 402:BTS compares the value of Eb/Nt that is detected and the target Eb/Nt that self stores, and sends the RPC message that is used to adjust reverse pilot power to AT according to comparative result.Specifically, if Eb/Nt that is detected and the difference of target Eb/Nt are E
1, E
1＞0, then the instruction of the adjustment reverse pilot power of carrying in the RPC message is for reducing reverse pilot power; E
1＜0, then instruction is for increasing reverse pilot power; E
1=0 for not adjusting;
Step 403:AT adjusts reverse pilot power according to the RPC message that is received.
The external circule power control flow process comprises the steps: as shown in Figure 5
Step 501:AT sends the reverse data bag to BTS;
Step 502:BTS decodes to described reverse data bag, if decode successfully, then carrying recorded decoding goes out the sub-Bale No. N and the execution in step 503 of packet; If the decoding failure, then writing down this reverse data bag is rascal, and decoded result is sent to BSC and goes to step 506.The so-called data that successfully promptly decoding obtained of decode are carried out cyclic redundancy check (CRC), and (Cyclic Redundancy Check CRC), passes through as if verification, then for to decode successfully; Otherwise verification is not by then being the decoding failure.
Reverse data bag and described sub-Bale No. N that step 503:BTS decodes success are sent to BSC, and BSC inquires about corresponding TT according to the transmission mode and the PS of the reverse data bag of described success decoding.Specific practice is: preserve the mapping relations table of transmission mode and PS and TT in BSC, the structure and the table 1 of this mapping relations table are similar, can be the concrete numerical value that increases by a row TT on the basis of table 1.Transmission mode and PS according to described reverse data bag inquire about the value that this mapping relations table can obtain TT.
Step 504: the size that compares TT and N, and according to definite mode and the adjusting range of adjusting T2P of comparative result, and the value of adjusted T2P is passed through General attribute update protocol, and (GenericAttribute Update Protocol, GAUP) message is sent to AT.Concrete method of adjustment is: establish TT-N=delta, if delta＞0, then adjustment mode is for reducing T2P, and the amplitude of reduction is directly proportional with the absolute value of delta; If delta＜0, then adjustment mode is rising T2P, and the amplitude of rising is directly proportional with the absolute value of delta, if delta=0 does not then adjust T2P.
Step 505:AT is about to the value that reverse pilot power multiply by described T2P according to the power of the value adjustment reverse traffic channel of the T2P in the GAUP message that is received, and the gained product is the power of reverse traffic channel.
Step 506:BSC judges that whether the number that up to the present the last PER of calculating receives the reverse data bag has reached predetermined value, if then execution in step 507, otherwise goes to step 501;
Step 507: the last time is calculated the number that up to the present PER receive rascal in the reverse data bag calculate the sum that up to the present PER receives the reverse data bag, obtain PER divided by the last time;
Step 508:BSC compares PER that calculates and the target P ER that self stores, adjust the value of target Eb/Nt according to comparative result, and adjusted target Eb/Nt is sent to BTS, BTS uses the target Eb/Nt that is received to upgrade the target Eb/Nt of self storage.Concrete method of adjustment can according in the existing EVDO Rev0 version to the method for adjustment of target Eb/Nt.
Technical solution of the present invention keeps the reverse power control algorithm of original EVDO Rev0 version, and increased on this basis according to the situation that satisfies of TT the power of reverse data bag has been adjusted, can accurately guarantee the reverse data packet delay requirement of difference " transmission mode+PS ", and then satisfy the professional time delay of oppositely eating dishes without rice or wine.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1, a kind of method of adjusting inversed business channel power is characterized in that, this method comprises the steps:
A, accessing terminal sends the reverse data bag to network side, network side is decoded to the reverse data bag that is received, carrying recorded decoding then goes out the sub-Bale No. N of packet if decode successfully, and the transmission mode and the bag size of the reverse data bag of decoding according to described success are inquired about the termination target that obtaining correspondence;
B, relatively stop the size of target and sub-Bale No. N, determine to adjust the power ratio T2P of Traffic Channel, and the value of adjusted T2P is sent to accesses terminal with respect to reverse pilot according to comparative result;
C, access terminal and adjust the transmitted power of the reverse data bag of described transmission mode and bag size correspondence according to the value of the T2P that is received.
2, method according to claim 1, it is characterized in that, network side sets in advance transmission mode and bag size and the mapping relations table that stops target, and then the described network side of steps A according to transmission mode and the corresponding termination target of bag size inquiry is: network side is inquired about the termination target that described mapping relations table obtains correspondence according to transmission mode and bag size.
3, method according to claim 1 is characterized in that, step B is described to determine that according to comparative result T2P comprises: establish delta=and stop target-N, if delta＞0 then reduces T2P, the amplitude of reduction is directly proportional with the delta absolute value; If delta＜0, the T2P that then raises, the amplitude of rising is directly proportional with the delta absolute value; If delta=0 does not then adjust T2P.
4, method according to claim 1 is characterized in that, the described value of step B with adjusted T2P be sent to access terminal for: send the General attribute update protocol GAUP message comprise adjusted T2P to accessing terminal.
5, method according to claim 1 is characterized in that, this method further comprises:
The number of rascal appears in C, network side record, and judge whether the number that up to the present last calculating Packet Error Ratio PER receives the reverse data bag has reached predetermined value, if, then calculated the number that up to the present PER receive rascal in the reverse data bag last time and calculate the sum that up to the present PER receives the reverse data bag divided by the last time, obtain PER, and continue execution in step D, otherwise go to steps A;
D, network side compare the PER that calculates and the target P ER of self storage, adjust the value of target bits energy and the ratio Eb/Nt of effective noise spectrum density according to comparative result, and the target Eb/Nt that is stored with adjusted target Eb/Nt renewal.
According to each described method of claim 1 to 5, it is characterized in that 6, described the accessing terminal of steps A further comprises to network side transmission reverse data bag:
A1, accessing terminal sends the reverse data bag by backward channel to the base station, and the Eb/Nt of described backward channel is detected in the base station;
A2, base station compare the value of Eb/Nt that is detected and the target Eb/Nt that self stores, and change the reverse power control channel RPC bit that is used to adjust Reverse Pilot Channel power according to comparative result;
A3, access terminal and adjust Reverse Pilot Channel power, and send the reverse data bag to the base station according to the RPC bit that received.
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| CN200610098899A CN100578958C (en) | 2006-07-19 | 2006-07-19 | A kind of method of adjusting inversed business channel power |
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| CN200610098899A CN100578958C (en) | 2006-07-19 | 2006-07-19 | A kind of method of adjusting inversed business channel power |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008154859A1 (en) * | 2007-06-18 | 2008-12-24 | Huawei Technologies Co., Ltd. | A method, system and apparatus for realizing reverse dedicated line user mechanism |
| WO2009024086A1 (en) * | 2007-08-20 | 2009-02-26 | Huawei Technologies Co., Ltd. | System for qos aware reverse link admission control in wireless communication systems |
| CN101262420B (en) * | 2008-03-10 | 2010-08-18 | 华为技术有限公司 | Reverse access control method, device and base station |
| CN101227655B (en) * | 2008-02-19 | 2010-12-29 | 华为技术有限公司 | System, apparatus and method for limiting speed of reverse class user |
-
2006
- 2006-07-19 CN CN200610098899A patent/CN100578958C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008154859A1 (en) * | 2007-06-18 | 2008-12-24 | Huawei Technologies Co., Ltd. | A method, system and apparatus for realizing reverse dedicated line user mechanism |
| 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 |
| WO2009024086A1 (en) * | 2007-08-20 | 2009-02-26 | Huawei Technologies Co., Ltd. | System for qos aware reverse link admission control in wireless communication systems |
| US8059657B2 (en) | 2007-08-20 | 2011-11-15 | Futurewei Technologies, Inc. | System for QOS aware reverse link admission control in wireless communication systems |
| CN101227655B (en) * | 2008-02-19 | 2010-12-29 | 华为技术有限公司 | System, apparatus and method for limiting speed of reverse class user |
| CN101262420B (en) * | 2008-03-10 | 2010-08-18 | 华为技术有限公司 | Reverse access control method, device and base station |
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