CN101075831A

CN101075831A - Method for controlling transmitting power of TD-SCDMA mobile telecommunication system by uncontinuous transmission state value

Info

Publication number: CN101075831A
Application number: CNA2006101319132A
Authority: CN
Inventors: 臧侃
Original assignee: ZHEJIANG HUALI COMMUNICATION GROUP CO Ltd
Current assignee: ZHEJIANG HUALI COMMUNICATION GROUP CO Ltd
Priority date: 2006-10-10
Filing date: 2006-10-10
Publication date: 2007-11-21

Abstract

The method relates to TD-SCDMA radio network controller (RNC), at least one TD-SCDMA base station, and at least one TD-SCDMA wireless transceiver unit (WTRU). Said base station uses at least one downlink (DL) coded composite transport channel (CCTrCH) to send the signals to WTRU; said WTRU uses a uplink (UL) coded composite transport channel to send the signals to base station; RNC transmits the DL transmission power control (TPC) step-length notice signal to the base station in order to control the signal power transmitted by the DL CCTrCH; RNC sends the UL TPC step-length notice signal to the WTRU in order to control the signal power transmitted by UL CCTrCH.

Description

The TD-SCDMA mobile communication system is used the method for discontinuous transmission state value control transmitting power

Technical field:

The application relates to the method for using discontinuous transmission state value control transmitting power in the TD-SCDMA mobile communication system, the TD-SCDMA mobile communication system should comprise a base station and at least one wireless transmit/receive units (WTRU) at least, and these base stations and WTRU are communicating to each other by up (UL) and descending (DL) coded combination transmission channel (CCTrCHs).

Background technology:

Closed power control is a technology that is widely used in wireless communication system (for example: global land wireless access (UTRA), Frequency Division Duplexing (FDD) (FDD) 3.84/1.28MCps, code division multiple access insert (CDMA) or the like similarly system).With regard to the through-put power of WTRU or base station, it is to carry out periodically adjusting according to the feedback information that the receiver in base station or the WTRU sends in opposite link.For example, suppose the closed power control among the DL, wherein this DL is controlling the through-put power that the base station is a certain specific WTRU transmission.From this base station received signal, and the through-put power of this base station is heightened or turned down to (such as signal and interference and noise ratio) to have determined whether to use the specific signal quality standard at section (for example: time slot or frame) this WTRU sometime.When base station (UL) sends data, WTRU sends the TPC order with other UL data at WTRU, and this order has comprised the relevant information that requires the base station to adjust its through-put power in follow-up DL transmission.

In a lot of systems, the TPC order has only comprised an information bit, in order to indicate whether increasing or reduce power by a scheduled volume or step-length.The frequency that can use each TPC order to use a plurality of information bits (allowing multistep length) or increase TPC order improves the accuracy that power is adjusted.But the drawback of doing like this is need to reduce the UL data volume of transmission so that be the more place of this additional TPC information creating.Therefore, between the power control accuracy of a direction and rightabout data transfer rate, exist one compromise.

At UTRA TDD, in (3.84MCPS and 1.28MCps), the DL power control that is used for DPCH (DPCHs) and DL shared physical channel (PDSCHs) is closed loop, and works according to the mode of describing in the epimere.

In addition, at UTRA TDD, in (only 1.28MCPS option), the UL power control that is used for DPCHs and UL shared physical channel (PUSCHs) equally also is closed loop.

Following canonical parameter is applicable to and the relevant UTRATDD of closed power control.Each TPC order (upstream or downstream) all comprises an information bit.TPC step-length (upstream or downstream) can be 1dB, 2dB or 3dB, and is determined in Radio Link is provided with.For the control of DL power, DL channel and at least one the UL channel that provides one or more TPC to order are associated.This DL channel can be a multiplexing channel with a plurality of transmission channels (TrCHs), and wherein, each TrCH can carry a different communication service.This multiplexing channel is known as CCTrCH.

Generally speaking, have a unidirectional UL CCTrCH and be designed on each DL CCTrCH, and, have a TPC order, wherein every frame 10ms (being used for the 3.84MCPS option) or subframe 5ms (being used for the 1.28MCps option).On the contrary, for UL power control (only being used for the 1.28MCPS option), UL CCTrCH then is connected on the DL CCTrCH that the TPC order is provided.The TPC order of every subframe 5ms is generally arranged.If but ULCCTrCH has taken a plurality of time slots (TPC order of the every time slot of every subframe), then has a plurality of TPC orders.

Be controlled to be basic CCTrCH with power, (DL CCTrCH is used for the control of DL power, and UL CCTrCH is used for the control of UL power), be known as power control CCTrCH.Feedback CCTrCH is meant the CCTrCH of another transmission direction that is associated with power control CCTrCH, and this CCTrCH also provides the CCTrCH TPC order of feedback, (be that UL CCTrCH is used for the control of DL power, DL CCTrCH is used for the control of UL power).Use the base station of power control CCTrCH or the CCTrCH that WTRU receives feedback, also send feedback CCTrCH simultaneously.

DTX is applied to (1.28MCPS and 3.84MCps) in the UTRA TDD system on the CCTrCH basis, do not transmit any data but prerequisite is this CCTrCH.A CCTrCH can support a user's part or all of transmission.Be used for also can using one or more CCTrCH at given time slot.When activating DTX owing to a CCTrCH, then support the arbitrary physical channel in this CCTrCH when not having data, not do any transmission, except first physical channel and each particular burst generation cycle (SBGP) frame (being used for UL) or each particular burst scheduling parameter (SBSP) frame (being used for DL), wherein SBGP or SBSP dispose when Radio Link is set up.The use of DTX has brought the obvious improvement of system and user terminal performance, and greatly reduces the interference in the system, and the life-span of battery of mobile phone obtains prolonging in the UL process of transmitting.

When using DTX on UL CCTrCH, in UTRATDD (3.84MCps and 1.28MCps) problem can appear just.This UL CCTrCH is the feedback to DL power control CCTrCH, (that is: this CCTrCH provides the TPC order).When this UL CCTrCH is in DTX, this TPC order can only be when particular burst be transmitted (, when each SBGP frame) could transmit.Therefore, the frequency that through-put power is upgraded reduces significantly, has also just caused the poor-performing of power control CCTrCH.For DL CCTrCH, when DL CCTrCH uses DTX and this DL CCTrCH when being the feedback CCTrCH of a UL CCTrCH, same problem can take place in UTRA TDD (only 1.28MCps option).In this case, this UL performance will be affected (and degeneration).But when this feedback (UL) CCTrCH was in DTX, if the yardstick of TPC increases, so this performance degradation can alleviate.

In the conventional wireless communication system, no matter what frequency the TPC order reaches on feedback CCTrCH, always use single TPC step-length.If have DTX on feedback CCTrCH, the number of times that sends the TPC order so can be than reduce by 2 to 256 times (value that depends on SBGP or SBSP) in normal transmission.Therefore, when DTX occurred in feedback CCTrCH, system designer or operator can use three the different options relevant with the configuration of Radio Link.

It is the TPC step-length that normal transmission is optimized that first option is to use at feedback CCTrCH, and on feedback CCTrCH in the DTX transmission course, the performance of power control CCTrCH is with relatively poor like this.If but DTX takes place among the CCTrCH through the feedback of being everlasting, this is unacceptable so.

Second option is to use the TPC step-length of optimizing for the DTX transmission on feedback CCTrCH, on feedback CCTrCH in the normal transmission process, power is controlled the performance suboptimum of CCTrCH like this.Sub-optimal performance is owing to used a TPC step-length that is necessary very much to cause in feedback in the normal transmission process on the CCTrCH, and needs to order when occurring often as TPC.

The 3rd option is that the particular burst cycle (SBGP or SBSP) is reduced to possible minimum value, thereby reduces the Effect on Performance to power control CCTrCH as much as possible.But this will remove the institute that uses DTX to bring and be beneficial to and reach benefit to battery consumption brought in feedback CCTrCH.

The 4th option is to use a plurality of information bits in the TPC order, thereby makes node can use bigger step-length of signal indication when feedback CCTrCH uses DTX.But as what narrate above, its shortcoming is the performance that has reduced feedback CCTrCH.

Above-mentioned option is all unsatisfactory, but can not cause systemic loss of energy.Yet, need to improve the performance of feedback CCTrCH under normal transmission and use DTX situation.

Summary of the invention:

Purpose of design: a kind of communication and system that is used to control by the signal power of DL and/or UL CCTrCHs transmission is provided.

Design: realize system for carrying out said process, can constitute by a wireless communication system, base station, a WTRU or an integrated circuit (IC).WTRU can be given by at least one DL CCTrCH transmission signals in base station, and/or this WTRU gives this base station by at least one UL CCTrCH transmission signals.This base station has determined whether to use the DTX pattern control DL CCTrCH power among the UL CCTrCH, and/or this WTRU has determined whether to use the DTX pattern control UL CCTrCH power of DL CCTrCH.When using DTX, the increase of CCTrCHs power or minimizing are determined by one first step-length.When not using DTX, the increase of CCTrCHs power or minimizing are determined by one second step-length.

The wireless communication system that is used for implementing the application comprises a radio network controller (RNC), and at least one base station and at least one WTRU.This RNC can transmit a DLTPC step-length notice signal to the base station, be used to control signal power, and/or UL TPC step-length notice signal of this RNC transmission is used to control signal power by UL CCTrCH transmission for this WTRU (via the base station) by DL CCTrCH transmission.

The base station of this system can determine whether to use the DTX pattern control DL CCTrCH power of UL CCTrCH, and the UL CCTrCH that determines whether to accept to comprise the TPC order of controlling DL CCTrCH, and whether according to TPC order renewal this DL CCTrCH power (increasing/subtract power) according to the step value of indicating in the DL TPC step-length notice signal.This step value depends on whether use DTX.

The base station can receive each the frame UL CCTrCH that requires in advance.If mandatory requirement does not receive ULCCTrCH at a certain particular frame, the base station can determine whether use DTX pattern control DL CCTrCH power at UL CCTrCH.If require to receive UL CCTrCH at two continuous frames, the base station can determine not use DTX pattern control DLCCTrCH power at UL CCTrCH, and UL CCTrCH before can use DTX.

DL TPC step-length notice signal can be used as message element and is embedded in that Radio Link is set up request message, Radio Link attach request message or radio link reconfiguration is prepared in the message.

The WTRU of this TD-SCDMA system can determine whether to use the DTX pattern control ULCCTrCH power of DL CCTrCH, and the DL CCTrCH that determines whether to accept to comprise the TPC order of controlling UL CCTrCH, and whether according to TPC order renewal this UL CCTrCH power (increasing/subtract power) according to the step value of indicating in the UL TPC step-length notice signal.This step value depends on whether use DTX.

WTRU can receive each the frame DL CCTrCH that requires in advance.If mandatory requirement does not receive DLCCTrCH at a certain particular frame, WTRU can determine whether use DTX pattern control UL CCTrCH power at DL CCTrCH.If require to receive DL CCTrCH at two continuous frames, WTRU can determine not use DTX pattern control UL CCTrCH power at DL CCTrCH, and DL CCTrCH before can use DTX.

The ULTPC step-length notice signal can be used as message element and is embedded in UL DPCH (DPCH) the power control signal group.

Technical scheme 1:TD-SCDMA mobile communication system is used the method for discontinuous transmission state value control transmitting power, relate to TD-SCDMA radio network controller (RNC), at least one TD-SCDMA base station and at least one TD-SCDMA wireless transmit/receive units (WTRU), 1. this base station transfers signals to WTRU by at least one down link (DL) coded combination transmission channel (CCTrCH); 2. this WTRU transfers signals to the base station by at least one up link (UL) CCTrCH; 3. RNC is transferred to the base station with DL through-put power control (TPC) step-length notice signal and is used to control signal power via DL CCTrCH transmission; 4. RNC is transferred to WTRU with UL TPC step-length notice signal and is used to control signal power via UL CCTrCH transmission.

Technical scheme 2: wireless communication system, the base station transfers signals to WTRU by at least one down link (DL) coded combination transmission channel (CCTrCH), WTRU then transfers signals to the base station by at least one up link (UL) CCTrCH, and by controlling by the mode of base station via the signal power of DL CCTrCH transmission, 1. this base station receives DL through-put power control (TPC) step-length notice signal; 2. this base station determines the whether discontinuous transmission (DTX) of application controls DLCCTrCH power; 3. this base station receives a UL CCTrCH who comprises the TPC order of control DL CCTrCH from this WTRU; 4. on TPC order basis, the mode that this base station increases and decreases or reduce power by the step value according to DL TPC step-length notice signal indication is upgraded the power of DL CCTrCH, wherein this step value depends on following mensuration: if a UL CCTrCH is not used to receive given predetermined time frame, this base station can determine DTX to be used to control the UL CCTrCH of a DL CCTrCH power so; If b UL CCTrCH is received in two continuous predetermined time frames, and DTX is used for the UL CCTrCH of a control DL CCTrCH power, and this base station can determine DTX not to be used to UL CCTrCH so.

Description of drawings:

Fig. 1 is the application's a radio communication block diagram;

Fig. 2 a, 2b and 2c have explained that when the DTX state had a normal value according to the application, various wireless link signals had embedded a normal step-length notice signal of DL TPC therein;

Fig. 3 a, 3b and 3c have explained that various wireless link signals have embedded a normal step-length notice signal of DL TPC therein when the DTX state has an interrupted value according to the application;

Fig. 4 has explained that one group of DPCH power control information signal has embedded a UL TPC DTX step-length notice signal therein when the DTX state has an interrupted value according to the application;

Fig. 5 is a process flow diagram, has wherein comprised to be used for the mode step of control (according to the application) by the signal power of DL CCTrCH transmission;

Fig. 6 is a process flow diagram, has wherein comprised to be used for the mode step of control (according to the application) by the signal power of UL CCTrCH transmission.

Embodiment:

Embodiment 1: with reference to accompanying drawing 1～6.The TD-SCDMA mobile communication system is used the method for discontinuous transmission state value control transmitting power, relate to TD-SCDMA radio network controller (RNC), at least one TD-SCDMA base station and at least one TD-SCDMA wireless transmit/receive units (WTRU), 1. this base station transfers signals to WTRU by at least one down link (DL) coded combination transmission channel (CCTrCH); 2. this WTRU transfers signals to the base station by at least one up link (UL) CCTrCH; 3. RNC is transferred to the base station with DL through-put power control (TPC) step-length notice signal and is used to control signal power via DL CCTrCH transmission; 4. RNC is transferred to WTRU with UL TPC step-length notice signal and is used to control signal power via UL CCTrCH transmission.

The DLTPC step-length notice signal is as message element, is embedded into Radio Link and sets up request message, or the Radio Link attach request message, or radio link reconfiguration preparation message, or UL DPCH (DPCH) power control messages.

Embodiment 2: with reference to accompanying drawing 1～6.Wireless communication system, the base station transfers signals to WTRU by at least one down link (DL) coded combination transmission channel (CCTrCH), WTRU then transfers signals to the base station by at least one up link (UL) CCTrCH, and by controlling by the mode of base station via the signal power of DL CCTrCH transmission, 1. this base station receives DL through-put power control (TPC) step-length notice signal; 2. this base station determines the whether discontinuous transmission (DTX) of application controls DL CCTrCH power; 3. this base station receives a UL CCTrCH who comprises the TPC order of controlling DLCCTrCH from this WTRU; 4. on TPC order basis, the mode that this base station increases and decreases or reduce power by the step value according to DL TPC step-length notice signal indication is upgraded the power of DL CCTrCH, wherein this step value depends on following mensuration: if a UL CCTrCH is not used to receive given predetermined time frame, this base station can determine DTX to be used to control the UL CCTrCH of a DL CCTrCH power so; If b UL CCTrCH is received in two continuous predetermined time frames, and DTX is used for the UL CCTrCH of a control DL CCTrCH power, and this base station can determine DTX not to be used to UL CCTrCH so.

DL TPC step-length notice signal is as message element, is embedded into Radio Link and sets up request message, or the Radio Link attach request message, or radio link reconfiguration preparation message, or UL DPCH (DPCH) power control messages.

Hereinafter term " WTRU " includes but not limited to that the user's set, pager or any other that are used for user terminal (UE), travelling carriage, fix or move have the device of operational capacity at wireless environment; " base station " includes but not limited to Node-B, site controller, access point or the interface arrangement of other type in wireless environment.

The application is applicable to TDD, FDD and time division duplex synchronization CDMA (TD-SCDMA), as be applied to Universal Mobile Telecommunications System (UMTS), CDMA2000 and CDMA, it also is conceived to be applicable to other wireless system.The application's feature can be integrated among the IC (integrated circuit) or be configured in the circuit that comprises a large amount of interconnection elements.

Fig. 1 has shown a wireless communication system 1 that comprises RNC2, base station 4 and WTRU6.This base station 4 transfers signals among this WTRU6 by at least one DL CCTrCH7, and this WTRU6 transfers signals in the base station 4 by at least one UL CCTrCH5.This RNC2 can use such as Radio Resource control (RRc) signaling via this base station 4 DL TPC step-length notice signal 120 is transferred in the base station 4, and/or UL TPC step-length notice signal 8 is transferred to WTRU6.UL and the control of DL power can be improved by the application.Although made explanation at preamble UTRA TDD, the application is still applicable to any communication system of using DTX in the power control command transmission direction.With regard to DL power control, the UTRA TDD in preamble (3.84MCPS and 1.28MCPS), in case the DTX among the UL and the TPC step-length notice used can by from the RNC2 that comprises radio link configuration information to the base station 4 modification of signal carried out.

Shown in Fig. 2 a, 2b and 2c, normal step-length notice signal 10 of DL TPC can be used as the message element in one of a plurality of signals of comprising radio link configuration information and is embedded into.These signals can be that Radio Link is provided with request message 9, Radio Link attach request message 11 or radio link reconfiguration ready signal 12.

Perhaps, shown in Fig. 3 a, 3b and 3c, if feedback CCTrCH can be in DTX, DL TPCDTX step-length notice signal 120 ￡＞will be used as Radio Link is provided with the message element in request message 13, Radio Link attach request message 15 or the radio link reconfiguration ready signal 16 and is sent out so.This flexible mode is chosen wantonly, in case know in advance among the UL and can not use DTX, or in case uses identical DL TPC step-length in DTX and normal (non-DTX) UL transmission.By convention, if RNC2 does not provide DL TPC DTX step-length notice signal 120fc, identical DL TPC step-length can be used in base station 4 in DTX and normal UL transmission so.

In transmission course, with regard to every 10ms frame or (being used for the 3.84MCPS option) or 5ms subframe (being used for the 1.28MCPS option), base station 4 need determine its more new transmission powers for each the DL CCTrCH in the Radio Link.For each DL CCTrCH, be defined and be used for corresponding feedback (UL) CCTrCH thereby have a DTX state.In a given time, if feedback CCTrCH in DTX, this DTX state will value " intermittently " so, perhaps, if feed back (UL) CCTrCH not in DTX, so will value " normally ".The initial value of DTX state is " normally ".If the DTX state is for " normally " and feed back CCTrCH and be not received and be used for set frame, this DTX state can be converted into " intermittently " so.Be received in two continuous frames if the DTX state is " intermittently " and feedback CCTrCH, this DTX state can be converted into " normally " so.

After providing the DTX state, the through-put power of power control CCTrCH will be updated, specific as follows: since transmission beginning last time (in preceding frame) of CCTrCH, be used for power control CCTrCH if received a TPC order, and the state of this DTX is " normally ", and this through-put power will be upgraded by+(the normal step size signal 10 of DLTPC) dB so, and prerequisite is that this TPC order is up, perhaps upgraded by-(the normal step size signal 10 of DL TPC) dB, prerequisite is that this TPC order is for descending; Transmission beginning last time (in preceding frame) since CCTrCH, be used for power control CCTrCH if received a TPC order, and the state of this DTX is " intermittently ", this through-put power will be upgraded by+(the normal step size signal 14 of DL TPCDTX) dB so, prerequisite is that this TPC order is up, perhaps upgraded by-(the normal step size signal 120Z of DL TPC DTX＞) dB, prerequisite is that this TPC order is for descending; Since the frame transmission beginning last time of CCTrCH, be not used for power control CCTrCH if there is the TPC order to be received, the transmission of this CCTrCH can remain unchanged so.

The UL power control that is used for UTRA TDD (only 1.28MCPS option) can use the RRC signaling to send a UL step-length notice signal 8 to WTRU6 via base station 4.This signaling is to send by the Dedicated Control Channel that is provided with between RNC2 and WTRU6 (DccH).From physical layer, this UL step-length information can be transferred to base station 4, and this base station forwards WTRU6 with wireless mode to before with this information under the situation of this information of not decoding then, that is, this UL step-length information is transferred on this base station 4 pellucidly.

As shown in Figure 4, can replenish the step-length notice that prevents that the DTX among the DL from using by in " up link DPCH power control information " sets of signals, adding a new message element UL TPCDTX step size signal 18.This ULTPCDTX step size signal 18 is chosen wantonly, in case know in advance among the DL and can not use DTX, or in case uses identical UL TPC step-length in DTX and normal (non-DTX) DL transmission.By convention, if RNC does not provide UL TPC DTX step-length notice signal 18, WTRU6 can use identical UL TPC step-length in DTX and normal DL transmission so.

In transmission course, with regard to every 5ms subframe (being used for the 1.28MCPS option), WTRU6 need determine its more new transmission powers for each the UL CCTrCH in the Radio Link.For each UL CCTrCH, have one " DTX state " thereby be defined and be used for corresponding feedback (DL) CCTrCH.In a given time, this value will be fed back (DL) CCTrCH according to this whether in DTX and value " intermittently " or " normally ".The initial value of DTX state is " normally ".If the DTX state is for " normally " and feed back CCTrCH and be not received and be used for set frame, this DTX state can be converted into " intermittently " so.Be received in two continuous frames if the DTX state is " intermittently " and feedback CCTrCH, this DTX state can be converted into " normally " so.

After providing the DTX state, the through-put power of power control CCTrCH will be updated, specific as follows: since transmission beginning last time (in preceding frame) of CCTrCH, be used for power control CCTrCH if received a TPC order, and the state of this DTX is " normally ", and this through-put power will be upgraded by+(TPC step-length 10) dB so, and prerequisite is that this TPC order is up, perhaps upgraded by-(TPC step-length 120a) dB, prerequisite is that this TPC order is for descending; Transmission beginning last time (in preceding frame) since CCTrCH, be used for power control CCTrCH if received a TPC order, and the state of this DTX is " intermittently ", this through-put power will be upgraded by+(TPC DTX step-length 14) dB so, prerequisite is that this TPC order is up, perhaps upgraded by-(TPC DTX step-length 14) dB, prerequisite is that this TPC order is for descending; Since the frame transmission beginning last time of CCTrCH, be not used for power control CCTrCH if there is the TPC order to be received, the transmission of this CCTrCH can remain unchanged so.

In an optional embodiment, can use a variable TPC step-length.This will allow the recipient (WTRU6 is at DL, and the base station is at UL) of power control CCTrCH dynamically to require a higher step-length, and prerequisite is to compare SIR with target to fall very lowly; When the frequency of through-put power renewal reduced owing to the DTX among the feedback CCTrCH, this often occurred.

Fig. 5 is a process flow diagram, has wherein comprised to be used for the mode step of control (according to the application) by the signal power of DL CCTrCH transmission.In step 19, RNC2 is transferred to step-length notice signal 3 in the base station 4.In step 20, the DTX state value is initialized to " normally " value.In step 21, carried out a mensuration, be used for DL CCTrCH in order to determine whether a UL CCTrCH (comprising a TPC order) is received in given time frame.If UL CCTrCH is not received in given time frame, this DTX state value can be converted into " intermittently " value (step 27) so, indicates DTX and is used to UL CCTrCH.In step 26, via the mode renewable DL CCTrCH power of TPC DL DTX step-length by increase and decrease power.If UL CCTrCH is received, can carry out a mensuration so in order to determine whether UL CCTrCH is received (step 22) in two continuous frames in given time frame.If this ULCCTrCH is received in two successive frames, as measuring in step 22, and this DTX state value is " intermittently " value, as measuring in step 23, this DTX state value can be converted into " normally " value so, indicates this DTX and is not used in UL CCTrCH (step 24).In step 25, increase and decrease the renewable DL CCTrCH of the mode power of power by the normal step-length of TPC DL.

Fig. 6 is a process flow diagram, has wherein comprised to be used for the mode step of control (according to the application) by the signal power of UL CCTrCH transmission.In step 28, RNC3 has been transferred to WTRU6 with a step-length notice signal 8.In step 29, this state value is initialized to " normally " value.In step 30, carried out a mensuration, be used for UL CCTrCH in order to determine whether a DL CCTrCH (comprising a TPC order) is received in given time frame.If DL CCTrCH is not received in given time frame, this DTX state value can be converted into " intermittently " value (step 36) so, indicates DTX and is used to DL CCTrCH.In step 35, via the mode renewable UL CCTrCH power of TPC UL DTX step-length by increase and decrease power.If DL CCTrCH is received, can carry out a mensuration so in order to determine whether DL CCTrCH is received (step 31) in two continuous frames in given time frame.If this DL CCTrCH is received in two successive frames, as measuring in step 31, and this DTX state value is " intermittently " value, as measuring in step 32, this DTX state value can be converted into " normally " value so, indicates this DTX and is not used in DL CCTrCH (step 33).In step 34, increase and decrease the renewable UL CCTrCH of the mode power of power by the normal step-length of TPC UL.

What need understand is: though the foregoing description is to the present invention's detailed explanation of contrasting; but this this explanation is to simple declaration of the present invention; rather than limitation of the present invention, any innovation and creation that do not exceed in the connotation of the present invention all fall within the scope of protection of the present invention.

Claims

1, a kind of TD-SCDMA mobile communication system is used the method for discontinuous transmission state value control transmitting power, relate to TD-SCDMA radio network controller (RNC), at least one TD-SCDMA base station and at least one TD-SCDMA wireless transmit/receive units (WTRU), it is characterized in that:

1. this base station transfers signals to WTRU by at least one down link (DL) coded combination transmission channel (CCTrCH);

2. this WTRU transfers signals to the base station by at least one up link (UL) CCTrCH;

3. RNC is transferred to the base station with DL through-put power control (TPC) step-length notice signal and is used to control signal power via the DLCCTrCH transmission;

4. RNC is transferred to WTRU with UL TPC step-length notice signal and is used to control signal power via UL CCTrCH transmission.

2, the method for the discontinuous transmission state value control of use according to claim 1 transmitting power is characterized in that:

Whether the discontinuous transmission (DTX) of UL CCTrCH that 1. is used to determine to control the power of DL CCTrCH is employed;

2. be used to receive a UL CCTrCH who comprises the TPC order of control DL CCTrCH;

3. on TPC order basis, the mode that increases and decreases or reduces power according to the step value of DL TPC step-length notice signal indication is upgraded the power of DL CCTrCH, and wherein this step value depends on whether this deciding means determines that DTX is employed.

3, the method for the discontinuous transmission state value control of use according to claim 2 transmitting power, UL CCTrCH is received by this base station in the plurality process of each predetermined time frame, it is characterized in that:

If 1. UL CCTrCH is not used as given pre-timing subframe reception, DTX is used to control the UL CCTrCH of a DLCCTrCH power so;

If 2. UL CCTrCH is received in two continuous predetermined time frames, and DTX is used for the UL CCTrCH of a control DLCCTrCH power, and DTX is not used to UL CCTrCH so.

4, wireless communication system according to claim 1 is characterized in that DL TPC step-length notice signal as message element, is embedded into:

1. Radio Link is provided with request message;

2. Radio Link attach request message;

3. radio link reconfiguration is prepared message;

4. UL DPCH (DPCH) power control information signal.

5, a kind of wireless communication system, the base station transfers signals to WTRU by at least one down link (DL) coded combination transmission channel (CCTrCH), WTRU then transfers signals to the base station by at least one up link (UL) CCTrCH, and, it is characterized in that by controlling by the mode of base station via the signal power of DL CCTrCH transmission:

1. this base station receives DL through-put power control (TPC) step-length notice signal;

2. this base station determines the whether discontinuous transmission (DTX) of application controls DL CCTrCH power;

3. this base station receives a UL CCTrCH who comprises the TPC order of control DL CCTrCH from this WTRU;

4. on TPC order basis, the mode that this base station increases and decreases or reduce power by the step value according to the indication of DL TPC step-length notice signal is upgraded the power of DL CCTrCH, and wherein this step value depends on following mensuration:

If a UL CCTrCH is not used to receive given predetermined time frame, this base station can determine DTX to be used to control the UL CCTrCH of a DL CCTrCH power so;

If b UL CCTrCH is received in two continuous predetermined time frames, and DTX is used for the UL CCTrCH of a control DLCCTrCH power, and this base station can determine DTX not to be used to UL CCTrCH so.