CN102547946A - Power control method and device of wireless communication system - Google Patents

Abstract

The invention relates to a wireless communication system and a device, which are used for controlling power under the wireless communication scene so as to improve performance of the power control. The embodiment method of the invention comprises the steps: the network side itself maintains power closed-loop quantity of each user terminal and angle information of each user; the network sends the power closed-loop quantity of a plurality of users in the same direction to one or more of user terminals by a downlink control channel to perform alignment of the terminal power and inform interference of the terminal for other users in order to avoid the raise of malignant power and improve power control performance. The embodiment method of the invention can effectively control mutual interference of the wireless systems and alignment of power at two ends so as to improve performance of the power control in the multi-carrier environment.

Description

A kind of Poewr control method of wireless communication system and device

Technical field

The present invention relates to wireless communication technology, carry out the method and apparatus of power control under particularly a kind of wireless communication system.

Background technology

HSUPA (High Speed Uplink Packet Data Access, high speed uplink bag data insert) technology is 3GPP (3rd Generation Partnership Project; 3G (Third Generation) Moblie standardization body) a kind of up enhanced scheme of Release7 proposition.

Wherein, the professional channel architecture of LCR TDD HSUPA comprises two up channels and two down channels.Two up channels are E-RUCCH (E-DCH Random access Uplink Control Channel, E-DCH inserts ascending control channel at random) and E-PUCH (E-DCH Physical Uplink Channel, E-DCH physical uplink channel).Two down channels are E-AGCH (E-DCH Absolute Grant Channel, E-DCH absolute grant channel), two down channels of E-HICH (E-DCH HARQ Indicator Channel, E-DCH HARQ just answers indicating channel).

At present, the HSUPA system is divided into scheduled transmission and non-scheduled transmission.The method of the scheduled transmission of HSUPA system comprises:

When a, terminal have uplink strengthening data etc. to be sent, send dispatch request information through E-RUCCH;

B, NodeB (evolution base station) carry out scheduling of resource according to the dispatch request information of receiving, and send resource scheduling information through E-AGCH;

C, terminal are according to the resource scheduling information of receiving; Strengthen transformat combination (E-TFC), select suitable TBS (Transport Block Size, transmission block size) and modulation system; Encode afterwards, modulate, send uplink strengthening data through E-PUCH;

After d, NodeB receive uplink strengthening data, carry out decoding processing, confirm feeding back ACK or nack message, feed back to this terminal through E-HICH after the coding according to CRC (Cyclic Redundancy Check, cyclic redundancy check).

Under the non-scheduled transmission mode, network side is the terminal distribution fixed resource, and E-AGCH information can not monitored in the terminal, and on fixing physical resource, sends relevant information.Network side also can receive user's relevant information in the fixed position, through passing through E-HICH behind the demodulation coding to terminal feedback ACK/NACK information.

Along with the evolution of system, introduced semi-continuous scheduling to the VoIP operation system, promptly once the resource or the endless resource in a plurality of cycles are promptly authorized in scheduling, arrive up to new schedule information.

The HSUPA of TD-SCDMA system, because the integrity problem of control channel, the power closed loop amount of its maintenance and network side cause the terminal power control performance to descend for the power closed loop amount of its maintenance has very big-difference for a long time.Simultaneously the TD-SCDMA system is a code division multiple access system, has the user power competitive effect of far-end, and promptly two in same direction; And the terminal that the position is approaching; When a user's channel performance does not reach when requiring, it can increase transmitting power, but can cause interference to another user simultaneously.And then another user also can improve transmitting power, causes vicious circle, causes yard subsystem power control performance under this scene to worsen.

In addition; For non-scheduled transmission and semi-continuous scheduling; Because it is fewer that control channel sends; And the TPC command word is carried on the E-HICH channel, in case pernicious lifting of emergent power or power closed loop amount such as do not line up at the problem that influences power control performance when occurring, present TD-SCDMA system has no idea to correct.

Summary of the invention

The embodiment of the invention provides the method and apparatus of power control under a kind of wireless communication system, controls with carrying out power, thereby has improved the performance of power control.

The Poewr control method of a kind of wireless communication system that the embodiment of the invention provides, this method comprises:

Each user's of network side self maintained power closed loop amount and each user's angle information; Network sends to one or more user terminals with a plurality of users' on the same direction power closed loop amount through Physical Downlink Control Channel, and initialization power closed loop amount after the power closed loop amount information of network is received at the terminal.

The embodiment of the invention provides a kind of base station, and this base station comprises:

Statistical module is added up the power closed loop amount of safeguarding into each user, and each user's angle and direction information;

Transmitter module when user of scheduling, through downlink physical control channel, is issued one or more terminal uses with the user's on the same direction power closed loop amount.

The embodiment of the invention provides a kind of user terminal, and this terminal comprises:

Receiver module receives the physical down control control channel of base station, and resolves the information that it carries.

Executive Module is according to the power closed loop amount of this user's who carries in the control channel power closed loop amount initialization terminal self maintained;

Judge module is judged if exist a user terminal more than or equal to its power closed loop amount, and its power closed loop amount surpasses threshold value, then terminal downward modulation transmitting power; Or judge that if the terminal has reached maximum transmission power and in the authorization channel of network emission, find to exist the power closed loop amount of other users' power closed loop amount more than or equal to said terminal, then the terminal stops emission or transmitting power reduces by half.

Each user's of embodiment of the invention network side self maintained power closed loop amount and each user's angle information; Network sends to one or more user terminals with a plurality of users' on the same direction power closed loop amount through Physical Downlink Control Channel, and initialization power closed loop amount after the power closed loop amount information of network is received at the terminal.Owing in wireless communication system, can correct the irregular change of the power closed loop amount at terminal, can avoid equidirectional user's pernicious flash-up simultaneously, thereby improve the performance of power control under the multicarrier environment, promoted the effect of power control.

Description of drawings

Fig. 1 is the system configuration sketch map of embodiment of the invention power control;

Fig. 2 is the structural representation at embodiment of the invention terminal;

Fig. 3 is the structural representation of embodiment of the invention base station;

Fig. 4 is the method flow sketch map of embodiment of the invention power control.

Embodiment

Each user's of embodiment of the invention network side self maintained power closed loop amount and each user's angle information; Network sends to one or more user terminals with a plurality of users' on the same direction power closed loop amount through Physical Downlink Control Channel, and initialization power closed loop amount after the power closed loop amount information of network is received at the terminal.Owing in wireless communication system, can correct the irregular change of the power closed loop amount at terminal, can avoid equidirectional user's pernicious flash-up simultaneously, thereby improve the performance of power control under the multicarrier environment, promoted the effect of power control.

Need to prove that the embodiment of the invention is applicable to the HSUPA system, also be applicable to the follow-up evolution system of HSUPA.

Below in conjunction with Figure of description the embodiment of the invention is described in further detail.

As shown in Figure 1, the system configuration of embodiment of the invention power control comprises: base station 10 and terminal 20.

Base station 10 is used for confirming the power closed loop amount and the angle information of terminal 20 and other user terminals, sends the power closed loop amount with terminal 20 and user terminal unidirectional with it through Physical Downlink Control Channel to terminal 20.

Terminal 20 is used for upgrading the power closed loop amount (being user class closed loop amount) of confirming self maintained according to the power closed loop amount of receiving.Judge simultaneously according to if exist a user terminal, and its power closed loop amount surpasses threshold value, then terminal downward modulation transmitting power more than or equal to its power closed loop amount.Or judge that if the terminal has reached maximum transmission power and in the authorization channel of network emission, find to exist the power closed loop amount of other users' power closed loop amount more than or equal to said terminal, then the terminal stops emission or transmitting power reduces by half.

Wherein, said threshold value can or preestablish through high-level signaling and obtain;

Wherein, said transmitting power is meant E-PUCH or HS-SICH or DPCH or E-RUCCH channel transmitting power.

As shown in Figure 2, embodiment of the invention terminal comprises:

Receiver module 200 is used to receive the physical down control control channel of base station, and resolves the information that it carries;

Concrete, this down channel can be E-AGCH, or the E-AGCH of mutation (for example second type E-AGCH).

Executive Module 210 is used for initialization terminal power closed loop amount, and this module is according to the power closed loop amount of this user's who carries in the control channel power closed loop amount initialization terminal self maintained;

Concrete, the terminal use with the closed loop amount of self maintained with its new closed loop amount initialization that receives.

Judge module 220 is used to judge pernicious power lifting, and this module is judged: if exist a user terminal more than or equal to its power closed loop amount, and its power closed loop amount surpasses threshold value, then terminal downward modulation transmitting power; Or judge: if the terminal has reached maximum transmission power, and in the authorization channel of network emission, find to exist the power closed loop amount of other users' power closed loop amount more than or equal to said terminal, then the terminal stops emission or transmitting power reduces by half.

Wherein, said threshold value can or preestablish through high-level signaling and obtain;

Wherein, said transmitting power is meant E-PUCH or HS-SICH or DPCH or E-RUCCH channel transmitting power.

As shown in Figure 3, the base station of the embodiment of the invention comprises: statistical module 100 and transmitter module 110.

Statistical module 100 is used to add up the power closed loop amount of safeguarding into each user, and each user's angle and direction information;

Concrete; Each user's closed loop amount is that safeguard at the terminal when being base station generation power control command word; Do wave beam forming when angle information then is base station receiving terminal upward signal and calculate, along with the continuous emission of upward signal, this user's of base station maintenance angle information is also brought in constant renewal in.

Transmitter module 110 is used for when user of scheduling, through downlink physical control channel, the user's on the same direction power closed loop amount being issued one or more terminal uses to terminal transmit power control relevant information;

Concrete, this downlink physical control channel is E-AGCH or its mutation channel, its mode of carrying can be carried at the idle bit in the E-AGCH channel.

As shown in Figure 4, the method for embodiment of the invention wireless communication system power control comprises the following steps:

Step 401, each user's of network side self maintained power closed loop amount and each user's angle information.

Wherein, network side is added up simultaneously and is positioned at the user terminal that is same as angular range.

Can be when wherein, network side is confirmed the angle information at each terminal in the step 401 according to each terminal up channel real-time update that transmits.

Step 402, network send to one or more user terminals with a plurality of users' on the same direction power closed loop amount through Physical Downlink Control Channel.

Wherein, physical control channel can be E-AGCH or its mutation channel.

Initialization power closed loop amount after the power closed loop amount information of network is received at step 403, terminal.

Wherein, can further include after the step 403:

Step a401, if exist a user terminal more than or equal to its power closed loop amount, and its power closed loop amount surpasses threshold value, then terminal downward modulation transmitting power;

Or

Step b401, if the terminal has reached maximum transmission power, and in the authorization channel of network emission, find to exist the power closed loop amount of other users' power closed loop amount more than or equal to said terminal, then the terminal stops emission or transmitting power reduces by half.

Wherein, said threshold value can or preestablish through high-level signaling and obtain;

Wherein, said transmitting power is meant E-PUCH or HS-SICH or DPCH or E-RUCCH channel transmitting power.

In the practical implementation process, the user class closed loop amount of self is safeguarded at the terminal, and network side is safeguarded the user class closed loop amount at each terminal.

From the foregoing description, can find out: embodiment of the invention network side is launched one or more users' power closed loop amount to being in unidirectional one or more terminal; The terminal can be upgraded the power control closed loop amount of self maintained according to the control information of the network that receives; And further can according to reference to the disturbed condition of other user terminals to confirm the transmitting power of self; This dual mode can be avoided the abnormal conditions of power control; Improve the performance of power control, promoted the effect of power control.

Obviously, the above only is a preferred implementation of the present invention, should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the principle of the invention, can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.Equally, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention is intended to comprise these changes and modification too interior.

Claims (6)

1. the method for wireless communication system power control is characterized in that this method comprises:

Each user's of network side self maintained power closed loop amount and each user's angle information;

Network sends to one or more user terminals with a plurality of users' on the same direction power closed loop amount through Physical Downlink Control Channel;

Initialization power closed loop amount after the power closed loop amount information of network is received at the terminal.

2. the method for claim 1 is characterized in that, this method also comprises:

After the terminal receives the power closed loop amount information according to other users, judge:

If the power closed loop amount that has other users is more than or equal to the power closed loop amount at terminal and above threshold value, then transmitting power is reduced at the terminal.

3. method as claimed in claim 2 is characterized in that, wherein said threshold value is perhaps made an appointment through the signaling configuration by network.

4. the method for claim 1 is characterized in that, this method also comprises:

If the terminal reached maximum transmission power, and in the authorization channel of network emission, find to exist the power closed loop amount of other users' power closed loop amount more than or equal to said terminal, then the terminal stops emission or transmitting power reduces by half.

5. a base station is characterized in that, this base station comprises:

Statistical module is added up the power closed loop amount of safeguarding into each user, and each user's angle and direction information;

Transmitter module when user of scheduling, through downlink physical control channel, is issued one or more terminal uses with the user's on the same direction power closed loop amount.

6. a terminal is characterized in that, this terminal comprises:

Receiver module receives the physical down control control channel of base station, and resolves the information that it carries.

Executive Module is according to the power closed loop amount of this user's who carries in the control channel power closed loop amount initialization terminal self maintained;

Judge module is judged if exist a user terminal more than or equal to its power closed loop amount, and its power closed loop amount surpasses threshold value, then terminal downward modulation transmitting power; Or judge that if the terminal has reached maximum transmission power and in the authorization channel of network emission, find to exist the power closed loop amount of other users' power closed loop amount more than or equal to said terminal, then the terminal stops emission or transmitting power reduces by half.

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