CN102075998A - Power control command notification method and system in carrier aggregation system - Google Patents
Power control command notification method and system in carrier aggregation system Download PDFInfo
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- CN102075998A CN102075998A CN200910224143XA CN200910224143A CN102075998A CN 102075998 A CN102075998 A CN 102075998A CN 200910224143X A CN200910224143X A CN 200910224143XA CN 200910224143 A CN200910224143 A CN 200910224143A CN 102075998 A CN102075998 A CN 102075998A
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- power control
- control command
- user terminal
- carrier wave
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure
Abstract
The invention discloses a power control command notification method in a carrier aggregation system. The method comprises the following steps of: dividing carriers with the same power control parameters in a power control command into a group; distributing a carrier resource to a user terminal according to the group; and sending the power control command corresponding to the carrier resource distributed to the user terminal to the user terminal. The invention discloses a power control command notification system in the carrier aggregation system at the same time. The system comprises a grouping unit, a resource distribution unit and a sending unit, wherein the grouping unit is used for dividing the carriers with the same power control parameters in the power control command into the group; the resource distribution unit is used for distributing the carrier resource to the user terminal according to the group; and the sending unit is used for sending the power control command corresponding to the carrier resource distributed to the user terminal to the user terminal. According to the technical scheme, the method and the system are simple and practical.
Description
Technical field
The present invention relates to the power control techniques of carrier wave, relate in particular to power control command Notification Method and system in a kind of carrier aggregation system.
Background technology
In follow-on broadband wireless communication network, how support under the bandwidth in current wireless communication system that bigger bandwidth becomes a key factor that improves inter-cell user terminal throughput and user terminal average throughput.
At present, Long Term Evolution (LTE in third generation partner program, Long Term Evolution) all propose to adopt the mode of carrier aggregation to come in current wireless communication system, to support effectively bigger bandwidth in the system, to satisfy in the new generation of wireless standard demand to indexs such as throughput, peak rates.Carrier aggregation is to support the key technology of bigger bandwidth in the future broadband wireless communication systems, by different carrier waves is carried out polymerization, form the carrier wave of bigger bandwidth, user terminal (the UE that support has stronger ability on the bandwidth after the polymerization, User Equipment), for example, senior Long Term Evolution (LTE-Advanced, Long Term Evolution-Advanced) needs to surpass the bandwidth of 100MHz in, and existing carrier resource does not still possess the single carrier resource of 100MHz bandwidth, carries out polymerization to satisfy the demand of communication system high bandwidth with regard to the carrier wave that needs a plurality of different frequency ranges.Like this, for carrying out carrier resource, user side dividing timing, may distribute a plurality of carrier resources, and when the carrier wave to user terminal carries out power control, need carry out power control according to the situation of current institute distributing carrier wave, this will need a plurality of power control commands to notify user terminal, and this will consume the power control command that a large amount of system resources are carried user terminal, cause the serious waste of system resource.
Summary of the invention
In view of this, main purpose of the present invention is to provide power control command Notification Method and system in a kind of carrier aggregation system, the carrier wave that power contorl parameters in the power control command is identical is divided into one group, can reduce making the power control command that is notified to user terminal, save system resource.
For achieving the above object, technical scheme of the present invention is achieved in that
Power control command Notification Method in a kind of carrier aggregation system, the carrier wave that power contorl parameters in the power control command is identical is divided into one group; Described method also comprises:
Be user terminal distributing carrier wave resource by group;
The power control command transmitting of the carrier resource correspondence that will distribute for described user terminal is given described user terminal.
Preferably, the described carrier wave that power contorl parameters in the power control command is identical is divided into one group, is specially:
The division threshold value of determining the power control command group according to the propagation conditions or the propagation performance of carrier wave;
Each carrier wave is carried out path loss measure, the identical carrier wave of threshold value section under the measured path loss is divided into one group.
Preferably, described is user terminal distributing carrier wave resource by group, comprising:
When one group of carrier wave can not satisfy the resource requirement of described user terminal,, and send the plural power control command of the carrier resource group correspondence of being distributed to described user terminal for described user terminal distributes carrier resource more than two groups.
Preferably, the indication field, the power control command word section that comprise carrier wave set in the described power control command at least.
Preferably, described method also comprises:
Described user terminal carries out power control according to the power control command that is received to corresponding carrier wave.
Power control command reporting system in a kind of carrier aggregation system comprises grouped element, resource allocation unit and transmitting element, wherein:
Grouped element is used for the carrier wave that the power control command power contorl parameters is identical and is divided into one group;
Resource allocation unit is used for being user terminal distributing carrier wave resource by group;
Transmitting element, the power control command transmitting that is used for the carrier resource correspondence that will distribute for described user terminal is given described user terminal.
Preferably, described grouped element comprises definite subelement, measures subelement and grouping subelement, wherein:
Determine subelement, be used for the division threshold value of determining the power control command group according to the propagation conditions or the propagation performance of carrier wave;
Measure subelement, be used for that each carrier wave is carried out path loss and measure;
The grouping subelement is used for the identical carrier wave of threshold value section under the measured path loss is divided into one group.
Preferably, when described resource allocation unit can not satisfy the resource requirement of described user terminal at one group of carrier wave, for described user terminal distributes carrier resource more than two groups, described transmitting element also sends the plural power control command of the carrier resource group correspondence of being distributed to described user terminal.
Preferably, the indication field, the power control command word section that comprise carrier wave set in the described power control command at least.
Preferably, described system also comprises:
Power control unit is arranged in described user terminal, is used for according to the power control command that is received corresponding carrier wave being carried out power control.
Among the present invention, at first the division threshold value of determining the power control command group according to the propagation conditions or the propagation performance of carrier wave is carried out path loss to each carrier wave again and is measured, and the identical carrier wave of threshold value section under the measured path loss is divided into one group.Like this, power contorl parameters will be identical in every group of pairing power control command of carrier wave, by grouping user terminal be carried out carrier resource and distribute, and like this, the power control command that sends to user terminal will reduce to minimum, has saved system resource.
Description of drawings
Fig. 1 is the flow chart of power control command Notification Method in the carrier aggregation system of the present invention;
Fig. 2 is the composition structural representation of power control command reporting system in the carrier aggregation system of the present invention.
Embodiment
Basic thought of the present invention is: the division threshold value of determining the power control command group according to the propagation conditions or the propagation performance of carrier wave at first, and again each carrier wave is carried out path loss and measure, the identical carrier wave of threshold value section under the measured path loss is divided into one group.Like this, power contorl parameters will be identical in every group of pairing power control command of carrier wave, by grouping user terminal be carried out carrier resource and distribute, and like this, the power control command that sends to user terminal will reduce to minimum, has saved system resource.Technical solution of the present invention realizes simple and practical.
For making the purpose, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.
Fig. 1 is the flow chart of power control command Notification Method in the carrier aggregation system of the present invention, and as shown in Figure 1, the power control command Notification Method specifically may further comprise the steps in the carrier aggregation system of the present invention:
Step 101: the carrier wave that power contorl parameters in the power control command is identical is divided into one group.
The division threshold value of the power control command group of carrier wave is determined in base station (BS, Base Station) according to indexs such as all carrier wave propagation conditionss, propagation performance demand in the system; Determine at first that promptly which type of carrier wave has identical power contorl parameters, can notify by identical power control command when the carrier wave in a group carries out power control.The path loss measurement is carried out to each carrier wave in base station (BS), determines pairing division threshold value section by the path loss measured value, and what the division threshold value section of measurement circuit loss value correspondence was identical is one group.
Step 102: be user terminal distributing carrier wave resource by group.
The base station is according to the bandwidth and the service feature demand of user side, at first from a power control command group carrier wave, be definite carrier resource that is distributed in the user terminal, if the carrier resource in the selected power control command group satisfies the carrier resource demand of user terminal, then base station (BS) selects required carrier resource for user side in current power control command group, otherwise, the base station will determine whether can satisfy the current carrier resource demand of described user terminal in other the power control command group, when all single group carrier resources all can not satisfy the resource requirement of user terminal, to in a plurality of power control command groups, be the carrier resource of user terminal selecting, to satisfy the demands.
Step 103: the power control command transmitting of the carrier resource correspondence that will distribute for described user terminal is given described user terminal.
Base station (BS) basis is the selected carrier resource of user terminal, determine the power contorl parameters of this group carrier wave by the power control command group at its distributing carrier wave place, will for the identification information of the power control command group at user terminal institute distributing carrier wave place with and corresponding power contorl parameters be packaged in the power control command, send to described user terminal.After user terminal receives power control command,, carry out carrier power control by described power contorl parameters according to the power control command group under the carrier wave.Because distributing to the carrier resource of user terminal can be a lot, to the equal required power control of each carrier wave, if different carrier is carried out power control respectively, to expend a large amount of system resource and come the carrier power control command of each carrier wave that informing user terminal distributes, the present invention divides into groups carrier wave by power control command, with the notice quantity of saving power control command greatly, saved system resource greatly.
Among the present invention, comprise indication field, the power control command word section of carrier wave set in the power control command at least.The power control command word section here is the concrete parameter that aforementioned base station is the definite power control of user terminal.
Step 104: user terminal carries out power control according to the power control command that is received to carrier wave.
After user terminal receives power control command,, carry out carrier power control by described power contorl parameters according to the current power control command group of using under the carrier wave.This step is for optimizing the step of technical solution of the present invention, is not the essential features that realizes basic technical scheme of the present invention.
The present invention has reduced the type of power control command by the setting of power control command group, has reduced overhead effectively.Simultaneously, carrier wave is divided by group, the flexibility of base station (BS) when scheduling carrier wave resources improved.
Fig. 2 is the composition structural representation of power control command reporting system in the carrier aggregation system of the present invention, as shown in Figure 2, the power control command reporting system comprises grouped element 20, resource allocation unit 21 and transmitting element 22 in the carrier aggregation system of the present invention, wherein, grouped element 20 is used for the carrier wave that the power control command power contorl parameters is identical and is divided into one group; Resource allocation unit 21 is used for being user terminal distributing carrier wave resource by group; Transmitting element 22 is used for the power control command transmitting of the carrier resource correspondence that will distribute for described user terminal and gives described user terminal.
Wherein, grouped element 20 comprises definite subelement, measures subelement and grouping subelement, wherein, determines that subelement is used for the division threshold value of determining the power control command group according to the propagation conditions or the propagation performance of carrier wave; Measure subelement, be used for that each carrier wave is carried out path loss and measure; The grouping subelement is used for the identical carrier wave of threshold value section under the measured path loss is divided into one group.
Concrete, when resource allocation unit 21 can not satisfy the resource requirement of described user terminal at one group of carrier wave, for described user terminal distributes carrier resource more than two groups, described transmitting element also sends the plural power control command of the carrier resource group correspondence of being distributed to described user terminal.
At least the indication field, the power control command word section that comprise carrier wave set in the above-mentioned power control command.
Above-mentioned grouped element 20, resource allocation unit 21 and transmitting element 22 are positioned at base station side.
As shown in Figure 2, the power control command reporting system also comprises power control unit 23 in the carrier aggregation system of the present invention, is arranged in described user terminal, is used for according to the power control command that is received corresponding carrier wave being carried out power control.Power control unit 23 is for optimizing the technical characterictic of technical solution of the present invention, is not the essential features that realizes basic technical scheme of the present invention.
Those skilled in the art are to be understood that, the power control command reporting system is for realizing that the power control command Notification Method designs in the aforesaid carrier aggregation system in the carrier aggregation system shown in Figure 2, the function of each processing unit can be understood with reference to the associated description in the power control command Notification Method in the aforementioned carrier aggregation system in the system shown in Figure 2, the function of each processing unit can realize by the program that runs on the processor, also can realize by concrete logical circuit.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (10)
1. power control command Notification Method in the carrier aggregation system is characterized in that the carrier wave that power contorl parameters in the power control command is identical is divided into one group; Described method also comprises:
Be user terminal distributing carrier wave resource by group;
The power control command transmitting of the carrier resource correspondence that will distribute for described user terminal is given described user terminal.
2. method according to claim 1 is characterized in that, the described carrier wave that power contorl parameters in the power control command is identical is divided into one group, is specially:
The division threshold value of determining the power control command group according to the propagation conditions or the propagation performance of carrier wave;
Each carrier wave is carried out path loss measure, the identical carrier wave of threshold value section under the measured path loss is divided into one group.
3. method according to claim 1 is characterized in that, described is user terminal distributing carrier wave resource by group, comprising:
When one group of carrier wave can not satisfy the resource requirement of described user terminal,, and send the plural power control command of the carrier resource group correspondence of being distributed to described user terminal for described user terminal distributes carrier resource more than two groups.
4. according to each described method in the claim 1 to 3, it is characterized in that, comprise indication field, the power control command word section of carrier wave set in the described power control command at least.
5. method according to claim 4 is characterized in that, described method also comprises:
Described user terminal carries out power control according to the power control command that is received to corresponding carrier wave.
6. power control command reporting system in the carrier aggregation system is characterized in that, comprises grouped element, resource allocation unit and transmitting element, wherein:
Grouped element is used for the carrier wave that the power control command power contorl parameters is identical and is divided into one group;
Resource allocation unit is used for being user terminal distributing carrier wave resource by group;
Transmitting element, the power control command transmitting that is used for the carrier resource correspondence that will distribute for described user terminal is given described user terminal.
7. system according to claim 6 is characterized in that, described grouped element comprises definite subelement, measures subelement and grouping subelement, wherein:
Determine subelement, be used for the division threshold value of determining the power control command group according to the propagation conditions or the propagation performance of carrier wave;
Measure subelement, be used for that each carrier wave is carried out path loss and measure;
The grouping subelement is used for the identical carrier wave of threshold value section under the measured path loss is divided into one group.
8. system according to claim 6, it is characterized in that, when described resource allocation unit can not satisfy the resource requirement of described user terminal at one group of carrier wave, for described user terminal distributes carrier resource more than two groups, described transmitting element also sends the plural power control command of the carrier resource group correspondence of being distributed to described user terminal.
9. according to each described system in the claim 6 to 8, it is characterized in that, comprise indication field, the power control command word section of carrier wave set in the described power control command at least.
10. system according to claim 9 is characterized in that, described system also comprises:
Power control unit is arranged in described user terminal, is used for according to the power control command that is received corresponding carrier wave being carried out power control.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910224143XA CN102075998A (en) | 2009-11-24 | 2009-11-24 | Power control command notification method and system in carrier aggregation system |
| PCT/CN2010/073151 WO2010148869A1 (en) | 2009-11-24 | 2010-05-24 | Method and system for notifying the power control commands in carrier aggregation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910224143XA CN102075998A (en) | 2009-11-24 | 2009-11-24 | Power control command notification method and system in carrier aggregation system |
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| CN102075998A true CN102075998A (en) | 2011-05-25 |
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| CN200910224143XA Pending CN102075998A (en) | 2009-11-24 | 2009-11-24 | Power control command notification method and system in carrier aggregation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104135355A (en) * | 2013-05-03 | 2014-11-05 | 索尼公司 | Communication device, communication system and communication method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2005018125A1 (en) * | 2003-08-19 | 2005-02-24 | Matsushita Electric Industrial Co., Ltd. | Multicarrier communication apparatus, multicarrier communication system, and transmission power control method |
| CN101039160A (en) * | 2006-03-17 | 2007-09-19 | 华为技术有限公司 | Multiplexing system, method for sharing control channel resource and reception equipment thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101345647B (en) * | 2007-07-13 | 2011-01-26 | 大唐移动通信设备有限公司 | Channel establishing method for high speed ascending packet data transmission, and network controller |
| CN101577569B (en) * | 2008-05-05 | 2013-01-16 | 鼎桥通信技术有限公司 | Method and devices for power control |
| CN101557641B (en) * | 2009-05-07 | 2010-12-08 | 浙江大学 | Subcarrier and power distribution method applicable to cellular relay system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005018125A1 (en) * | 2003-08-19 | 2005-02-24 | Matsushita Electric Industrial Co., Ltd. | Multicarrier communication apparatus, multicarrier communication system, and transmission power control method |
| CN101039160A (en) * | 2006-03-17 | 2007-09-19 | 华为技术有限公司 | Multiplexing system, method for sharing control channel resource and reception equipment thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104135355A (en) * | 2013-05-03 | 2014-11-05 | 索尼公司 | Communication device, communication system and communication method |
| US10455596B2 (en) | 2013-05-03 | 2019-10-22 | Sony Corporation | Communication apparatus, communication system and communication method |
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| WO2010148869A1 (en) | 2010-12-29 |
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Application publication date: 20110525 |