CN101132205A - Closed-loop power control method for code division multiple access system - Google Patents
Closed-loop power control method for code division multiple access system Download PDFInfo
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- CN101132205A CN101132205A CNA2006101219327A CN200610121932A CN101132205A CN 101132205 A CN101132205 A CN 101132205A CN A2006101219327 A CNA2006101219327 A CN A2006101219327A CN 200610121932 A CN200610121932 A CN 200610121932A CN 101132205 A CN101132205 A CN 101132205A
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Abstract
This invention discloses a method for controlling closed loop power of a CDMA system including the following steps: 1, a user device receives a parameter value collocated for higher level signaling of the network side and adjusts step-length value of the emission power, 2, the user device adjusts the transmission power of the up service channel based on the comparing result of times of continuously received confirmed or non re-transmitted instruction information with the assigned parameter value of the higher level signaling of the network side.
Description
Technical field
The present invention relates to the wireless communication technique field, particularly relate to the close-loop power controlling method in a kind of CDMA radio communication system.
Background technology
In the CDMA radio communication system, a very crucial problem is exactly the maximization of taking into account system capacity, promptly can simultaneously treated user or traffic carrying capacity maximization.Thereby in the CDMA radio communication system, consider the factor of transmitting power and interference, and then reach desired quality of service with alap transmitting power, most important to power system capacity.
At the up direction that is transmitted into network side from terminal, promptly reverse, if can satisfy under the prerequisite of communication quality, it is identical in the signal level that arrives network side radio R-T unit place to control transmitting of each terminal, then in the spread-spectrum communication system of code division multiple access, it is maximum that up-link capacity can reach.At the down direction that is transmitted into terminal from network side, i.e. forward direction, if can satisfy under the prerequisite of communication quality, Control Allocation launches for the channel of each terminal with minimal power, then downlink capacity can reach maximum.
For power system capacity is provided as far as possible, CDMA communication system has all been taked corresponding wireless channel Poewr control method, control of ring fast power and outer shroud slow-speed power control method in Poewr control method comprises usually.Inner loop power control method is measured by the received signal quality to wireless channel, and compares with the desired value of signal quality, carries out the increase of radio channel transmit power apace or reduce by relevant signaling then adjusting; Exterior ring power control is by measuring the error rate or the Block Error Rate that receive data, and compares with desired value, adjusts the signal quality target value in the inner loop power control procedure then.Therefore, inner-loop power control is very fast relatively usually, and external circule power control is relatively slow.
In 3-G (Generation Three mobile communication system), for the upstream packet business of higher rate is provided, improve spectrum utilization efficiency, 3GPP (3rd Generation Partnership Project, third generation partner program) has introduced high speed uplink packet access (HSUPA:High Speed Uplink Packet Access) characteristic in its standard.In the HSUPA characteristic, introduced automatic repeat requests (the HARQ:Hybrid Automatic Retransmission Request) technology of mixing.In the HARQ technology in the HSUPA characteristic, receiving terminal Node B (Node B) produces ACK/NACK (affirmation/non-affirmation) re-transmission indication information based on physical layer decoding or CRC check result, and feeds back to subscriber equipment (UE).In the UE side,, then this is not carried out retransmission operation if once that receive is ACK after the emission; If NACK, then UE carries out retransmission operation to this emission.
Though ACK/NACK is not that direct quality according to wireless channel produces,, in the HSUPA characteristic, introduced the dispatching technique of Node B control, and, Node B scheduling of resource, the up emission data of UE, and the chronomere of Node B feedback re-transmission indication information is identical.And for the time-varying characteristics that adapt to wireless channel better with reduce the network processes time delay, this chronomere is relatively short.Therefore, ACK/NACK also can reflect the quality of wireless channel in the chronomere.
In the prior art, also do not have special-purpose closed loop power control command to control the quality of wireless channel, satisfy business need.
Summary of the invention
In view of this, the technical problem to be solved in the present invention has been to provide a kind of close-loop power controlling method of code division multiple access system, to solve in the HSUPA of CDMA access system characteristic, there is not under the situation of special-purpose closed loop power control command the closed power control problem of reverse link traffic channel.
Technical scheme provided by the invention is as follows:
A kind of close-loop power controlling method of code division multiple access system, based on the automatic retransmission technique of the mixing in the high-speed ascending grouping access characteristic, this method comprises the steps:
Step 1: subscriber equipment receives the parameter value of network side high-level signaling configuration and adjusts the step value of transmitting power;
Step 2: subscriber equipment retransmits the comparative result of indication information number of times with the parameter value of network side high-level signaling configuration based on affirmation that receives continuously or non-affirmation, adjusts the transmitted power of reverse link traffic channel.
Further, said method also has following characteristics: parameter value is specially in the described step 1: is the parameter value N 1 and the N2 of user device configuration by network side by the RRC high-level signaling, and described N1, N2 are the integer greater than 0.
Further, said method also has following characteristics: if distinguish scheduling and non-dispatching uplink traffic channel resource, then need to be respectively the value of scheduling and non-scheduling resource configuration parameter N1 and N2; Otherwise scheduling and non-scheduling resource are shared the Configuration Values of same parameter N 1 and N2.
Further, said method also has following characteristics: the step value of the adjustment transmitting power in the described step 1 is specially: the default concrete numerical value in order to reduce or increase the reverse link traffic channel transmitting power, this numerical value is configured by the RRC high-level signaling by network side.
Further, said method also has following characteristics: affirmation in the described step 2 or non-affirmation re-transmission indication information are specifically decoded based on physical layer by Node B or the CRC check result produces and feed back to subscriber equipment.
Further, said method also has following characteristics: described step 2 specifically comprises the steps:
2.1: confirmation of receipt or non-affirmation retransmit the number of indication information to subscriber equipment continuously from the E-HICH channel;
2.2: confirm to retransmit indication information if subscriber equipment receives N1 continuously, then reduce the transmitting power of reverse link traffic channel E-PUCH, described to reduce to be worth be a step value of adjusting transmitting power;
If subscriber equipment receives N2 non-affirmation continuously and retransmits indication information, then increase the transmitting power of reverse link traffic channel E-PUCH, described added value is a step value of adjusting transmitting power.
Further, said method also has following characteristics: described step 2 also further comprises the steps:
2.3: if after subscriber equipment receives 1～N1-1 affirmation re-transmission indication information continuously, receive a non-affirmation and retransmit indication information, subscriber equipment is counted the affirmation that receives subsequently again and is retransmitted the indication information number;
2.4: if after subscriber equipment receives 1～N2-1 non-affirmation re-transmission indication information continuously, receive one and confirm to retransmit indication information, subscriber equipment is counted the non-affirmation that receives subsequently again and is retransmitted the indication information number.
Further, said method also has following characteristics: if distinguish scheduling and non-dispatching uplink traffic channel resource, then scheduling and non-dispatching uplink Traffic Channel are carried out the uplink closed loop process respectively.
As from the foregoing, the invention provides in a kind of HSUPA characteristic of code division multiple access system, based on the close-loop power controlling method of ACK/NACK.Make that the closed power of reverse link traffic channel also can carry out under the situation that does not have special-purpose closed loop power control command, thereby the quality of control wireless channel satisfies business need.Simultaneously, saved the signaling consumption of special-purpose closed power order.
Description of drawings
Fig. 1 is the flow chart of steps of the inventive method;
Fig. 2 is the HSUPA principle schematic of TD-SCDMA system.
Embodiment:
Below with reference to accompanying drawing, core concept of the present invention and each preferred embodiment are carried out further detailed description and explanation.
The invention provides a kind of close-loop power controlling method of code division multiple access system, its core concept is:
In the HSUPA characteristic, since Node B scheduling of resource, the up emission data of UE, and the chronomere of Node B feedback re-transmission indication information is identical and this chronomere is relatively short.So ACIK/NACK also can reflect the quality of wireless channel in the chronomere.
At These characteristics, proposed a kind of subscriber equipment and retransmitted the comparative result of indication information number of times with the parameter value of network side high-level signaling configuration based on affirmation that receives continuously or non-affirmation, adjust the method for the transmitted power of reverse link traffic channel.The concrete steps of this method are as shown in Figure 1:
Step 1: subscriber equipment receives the parameter value of network side high-level signaling configuration and adjusts the step value of transmitting power;
Step 2: subscriber equipment retransmits the comparative result of indication information number of times with the parameter value of network side high-level signaling configuration based on affirmation that receives continuously or non-affirmation, adjusts the transmitted power of reverse link traffic channel.
Fig. 2 is the HSUPA principle schematic of TD-SCDMA system, as shown in Figure 2, and in the HSUPA of TD-SCDMA system technology:
The MAC layer has been introduced new MAC entity (MAC-e), is positioned under the MAC-d, is responsible for the scheduling of uplink service physical channel resources, functions such as HARQ re-transmission, MAC-e multiplex/demultiplex and E-TFC selection.Aspect transmission channel, the business datum in the new exclusive use transmission signal channel carrying HSUPA characteristic of introducing.In physical layer, new scheduling and the non-scheduling E-PUCH physical channel introduced is used to carry E-DCH.Part in the up signaling of MAC-e is by 2 new ascending control channel carryings of introducing, main transmitting HARQ, the information that auxiliary dispatching is relevant.Comprise E-UCCH (E-DCH ascending control channel), be used to transmit the relevant information of E-TFCI, HARQ.E-RUCCH (E-DCH inserts ascending control channel at random) is used to transmit the relevant information of auxiliary dispatching.New downlink signaling channel E-AGCH (E-DCH Absolute Grant Channel:E-DCH absolute grant channel) of introducing and E-HICH (E-DCH Hybrid ARQ indicator channel:E-DCH HARQ indicating channel) are respectively applied for the transmission authorization message and retransmit indication information with the ACK/NACK that carries up E-DCH HARQ.
In said system, down channel E-AGCH and E-HICH need not carry the special-purpose closed loop power control command TPC of reverse link traffic channel E-PUCH.The control of the closed power of reverse link traffic channel E-PUCH based on the E-HICH channel ACK/NACK retransmit indication information and carry out.
Below will be further explained in detail the present invention by description to a specific embodiment.
At first, to the parameter N 1 of network side high-level signaling configuration and the value of N2, wherein N1, N2 are the integer greater than 0 to UE by RRC (Radio Resource control) message sink; If distinguish scheduling and non-dispatching uplink traffic channel resource, then need to be respectively the value of scheduling and non-scheduling resource configuration parameter N1 and N2; Otherwise scheduling and non-scheduling resource are shared the Configuration Values of same parameter N 1 and N2.Simultaneously, UE also needs to receive the step value that reduces or increase transmitting power of the high-rise configuration of network side.
Secondly, ACK that UE will receive from the E-HICH channel continuously or the number of NACK compare with the parameter N 1 or the N2 of the configuration of network side high-level signaling, determine to reduce or increase the transmitting power of reverse link traffic channel E-PUCH.Concrete process is as follows:
If UE receives N1 ACK continuously, then UE reduces the transmitting power of reverse link traffic channel E-PUCH, and reducing value is a step value; If UE receives a non-affirmation and retransmits indication information after receiving 1～N1-1 affirmation re-transmission indication information continuously, then UE counts the affirmation that receives subsequently again and retransmits the indication information number;
If UE receives N2 NACK continuously, then UE increases the transmitting power of reverse link traffic channel E-PUCH, and added value is a step value; If UE receives one and confirms to retransmit indication information after receiving 1～N2-1 non-affirmation re-transmission indication information continuously, UE counts the non-affirmation that receives subsequently again and retransmits the indication information number.
In the said process, if distinguish scheduling and non-dispatching uplink traffic channel resource, then scheduling and non-dispatching uplink Traffic Channel are carried out the uplink closed loop process respectively.
Should be understood that above-mentioned description at specific embodiment is comparatively detailed, can not therefore think the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with claims.
Claims (8)
1. the close-loop power controlling method of a code division multiple access system, is characterized in that this method comprises the steps: based on the automatic retransmission technique of the mixing in the high-speed ascending grouping access characteristic
Step 1: subscriber equipment receives the parameter value of network side high-level signaling configuration and adjusts the step value of transmitting power;
Step 2: subscriber equipment retransmits the comparative result of indication information number of times with the parameter value of network side high-level signaling configuration based on affirmation that receives continuously or non-affirmation, adjusts the transmitted power of reverse link traffic channel.
2. the close-loop power controlling method of a kind of code division multiple access system according to claim 1, it is characterized in that, parameter value is specially in the described step 1: is the parameter value N 1 and the N2 of user device configuration by network side by Radio Resource control high-level signaling, and described N1, N2 are the integer greater than 0.
3. the close-loop power controlling method of a kind of code division multiple access system according to claim 2 is characterized in that, if distinguish scheduling and non-dispatching uplink traffic channel resource, then needs to be respectively the value of scheduling and non-scheduling resource configuration parameter N1 and N2; Otherwise scheduling and non-scheduling resource are shared the Configuration Values of same parameter N 1 and N2.
4. the close-loop power controlling method of a kind of code division multiple access system according to claim 1, it is characterized in that, the step value of the adjustment transmitting power in the described step 1 is specially: the default concrete numerical value in order to reduce or increase the reverse link traffic channel transmitting power, this numerical value is configured by Radio Resource control high-level signaling by network side.
5. the close-loop power controlling method of a kind of code division multiple access system according to claim 1, it is characterized in that affirmation in the described step 2 or non-affirmation re-transmission indication information are specifically decoded based on physical layer by Node B or the CRC check result produces and feed back to subscriber equipment.
6. according to the close-loop power controlling method of claim 1,2 or 3 described a kind of code division multiple access systems, it is characterized in that described step 2 specifically comprises the steps:
2.1: confirmation of receipt or non-affirmation retransmit the number of indication information to subscriber equipment continuously from the E-HICH channel;
2.2: confirm to retransmit indication information if subscriber equipment receives N1 continuously, then reduce the transmitting power of reverse link traffic channel E-PUCH, described to reduce to be worth be a step value of adjusting transmitting power;
If subscriber equipment receives N2 non-affirmation continuously and retransmits indication information, then increase the transmitting power of reverse link traffic channel E-PUCH, described added value is a step value of adjusting transmitting power.
7. the close-loop power controlling method of a kind of code division multiple access system according to claim 6 is characterized in that, described step 2 also further comprises the steps:
2.3: if after subscriber equipment receives 1～N1-1 affirmation re-transmission indication information continuously, receive a non-affirmation and retransmit indication information, subscriber equipment is counted the affirmation that receives subsequently again and is retransmitted the indication information number;
2.4: if after subscriber equipment receives 1～N2-1 non-affirmation re-transmission indication information continuously, receive one and confirm to retransmit indication information, subscriber equipment is counted the non-affirmation that receives subsequently again and is retransmitted the indication information number.
8. the close-loop power controlling method of a kind of code division multiple access system according to claim 6, it is characterized in that, if distinguish scheduling and non-dispatching uplink traffic channel resource, then scheduling and non-dispatching uplink Traffic Channel are carried out the uplink closed loop process respectively.
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| CNA2006101219327A CN101132205A (en) | 2006-08-24 | 2006-08-24 | Closed-loop power control method for code division multiple access system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101932047A (en) * | 2009-06-22 | 2010-12-29 | 大唐移动通信设备有限公司 | Method and system for E-PUCH power control |
| WO2012019409A1 (en) * | 2010-08-12 | 2012-02-16 | 中兴通讯股份有限公司 | Method and system for obtaining region size of closed-loop power control |
| CN108235392A (en) * | 2017-12-26 | 2018-06-29 | 广东欧珀移动通信有限公司 | Network switching control method and device |
| WO2018127157A1 (en) * | 2017-01-06 | 2018-07-12 | 华为技术有限公司 | Transmitting method and receiving method for uplink signal, terminal, and base station |
| CN110351034A (en) * | 2018-04-03 | 2019-10-18 | 华为技术有限公司 | Control channel transmission method and the network equipment |
-
2006
- 2006-08-24 CN CNA2006101219327A patent/CN101132205A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101932047A (en) * | 2009-06-22 | 2010-12-29 | 大唐移动通信设备有限公司 | Method and system for E-PUCH power control |
| CN101932047B (en) * | 2009-06-22 | 2013-06-19 | 电信科学技术研究院 | Method and system for E-PUCH power control |
| WO2012019409A1 (en) * | 2010-08-12 | 2012-02-16 | 中兴通讯股份有限公司 | Method and system for obtaining region size of closed-loop power control |
| WO2018127157A1 (en) * | 2017-01-06 | 2018-07-12 | 华为技术有限公司 | Transmitting method and receiving method for uplink signal, terminal, and base station |
| CN108282433A (en) * | 2017-01-06 | 2018-07-13 | 华为技术有限公司 | A kind of uplink signal sending method, method of reseptance, terminal and base station |
| CN108282433B (en) * | 2017-01-06 | 2021-03-23 | 华为技术有限公司 | Uplink signal sending method, receiving method, terminal and base station |
| CN108235392A (en) * | 2017-12-26 | 2018-06-29 | 广东欧珀移动通信有限公司 | Network switching control method and device |
| CN108235392B (en) * | 2017-12-26 | 2020-12-25 | Oppo广东移动通信有限公司 | Network switching control method and device |
| CN110351034A (en) * | 2018-04-03 | 2019-10-18 | 华为技术有限公司 | Control channel transmission method and the network equipment |
| CN110351034B (en) * | 2018-04-03 | 2021-01-29 | 华为技术有限公司 | Control channel transmission method and network equipment |
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Application publication date: 20080227 |