CN1300479A

CN1300479A - Time-switched transmission deversity (tstd) device and controlling method thereof in mobile commuzication system

Info

Publication number: CN1300479A
Application number: CN99805961A
Authority: CN
Inventors: 朴振秀; 朴洙元; 尹淳暎; 安宰民
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 1998-05-13
Filing date: 1999-05-13
Publication date: 2001-06-20
Also published as: AU752782B2; JP2002515681A; AU3735599A; RU2199820C2; WO1999059263A1; CA2331858A1; EP1078477A1; KR19990088235A; BR9910317A

Abstract

There is provided a transmission diversity controlling method in a mobile communication system including a base station which transmits forward common and dedicated channel data through at least two antennas with transmission diversity. The base station sends a message indicating a TSTD (Tune-Switched Transmission Diversity)/non TSTD transmission mode through an antenna to a plurality of mobile stations in the coverage area of the base station. Then, each mobile station analyses the message received from the base station and sets its reception mode to a TSTD/non-TSTD mode according to the transmission mode.

Description

Time-division in the mobile communication system is switched transmission diversity apparatus and control method thereof

Background of invention

1. invention field

The present invention relates generally to field of wireless communications, relate in particular to and have the time-division in a kind of mobile communication system and switch to send diversity (time-switched transmission diversity, TSTD) transmission/receiving system of function and control method thereof.(in order to understand the present invention better, referring to korean patent application 1998-5526 number, korean patent application 1998-17277 number and korean patent application 1998-17280 number)

2. description of Related Art

In most of mobile communication system, base station (BS) and travelling carriage (MS) communicate to each other by their individual antenna.When the signal fadeout phenomenon occurring, a plurality of data sets are damaged, and cause the severe exacerbation of communication quality.This problem can adopt a kind of like this transmission diversity scheme to solve, and wherein sends data through at least two transmitting antennas.That is, under the signal fadeout environment, send the data transmission/receptivity that diversity scheme can improve mobile communication system.

Except use sending diversity scheme, can on reverse link, adopt the receive diversity scheme, that is, and a plurality of reception antennas of installation in BS, make BS can be with good receptivity through reverse link from the MS received signal.By forward link, BS can send signal through multiple day alignment MS.In order to communicate with BS, MS can adopt one of following measure: adopt the transmission diversity scheme of a plurality of transmitting antennas and single receive antenna, the receive diversity scheme that needs a plurality of reception antennas or the combination of transmission and receive diversity scheme.

But because portable terminal is little, therefore, the receive diversity on the forward link is unworkable.That is to say,, therefore,, then will cause diversity gain less if on portable terminal, adopt a plurality of reception antennas because the distance between the antenna is limited.In addition, should on portable terminal, install the device of realizing respectively that is used for receiving forward link signal and transmission reverse link signal through corresponding antenna.Therefore, for above-mentioned reasons, from the size of travelling carriage with become originally, the receive diversity scheme is more unfavorable.So in the base station, forward link generally adopts the transmission diversity scheme.

The present invention's general introduction

Method of the present invention generally is called the time-division switching and sends diversity (TSTD), and is applied to the signal transmission of the forward link from BS to MS in CDMA (code division multiple access) mobile communication system.By at least two antenna transmission signals that alternately switch in BS, the TSTD scheme has improved transmitting efficiency.Owing to compare with traditional single antenna transmission/receiving system, TSTD transmission/receiving system has increased the complexity of device and has improved performance, therefore, expects that TSTD device of the present invention and non-TSTD device (that is prior art) device can coexist.So in order to guarantee to carry out reliably TSTD transmission/reception, BS and MS should support the TSTD mode, and have a plurality of controllers and be used for before transmission/receiving subscriber data, determining whether using the TSTD mode and send the process of data through dedicated channel.For non-TSTDMS can mutually compatiblely be communicated with TSTD BS, this control procedure is essential.

For make BS in the TSTD mode through at least two antenna transmission modulating datas with make MS receive the TSTD data from BS, should set up their mode of operation.In order to carry out proper operation, if BS will send data in the TSTD mode, then MS detects send mode by analyzing the message that receives from BS, and is set to TSTD mode or non-TSTD mode according to its receive mode of detected send mode, is used to carry out Data Receiving.

Therefore, an object of the present invention is, a kind of device and control method thereof of carrying out data communication between supporting as the BS of optional or TSTD mode that must function and MS of being used for is provided.

Another object of the present invention is, a kind of device and control method of supporting as transmission/receive mode of the BS of the TSTD mode of optional or essential function and MS thereof that be used to be provided with is provided.

Another object of the present invention is, a kind of apparatus and method that are used to estimate the channel status of the TSTD signal that receives from TSTD BS through a plurality of transmitting antennas are provided.

Another object of the present invention is, a kind of method that is used for being provided with the TSTD mode between supporting as the BS of optional or TSTD mode that must function and MS is provided.

Another object of the present invention is, provides a kind of and is used in mobile communication system, the method for the public and dedicated channel of operation forward direction between supporting as the BS of the TSTD mode of optional feature and MS.

Another purpose of the present invention is, provide a kind of and be used in mobile communication system, support as the BS and the MS of the TSTD mode of optional or essential function with do not support under the BS and MS coexistence situation of TSTD, operate the public apparatus and method with dedicated channel of forward direction.

To achieve these goals, provide the diversity control method of the transmission in a kind of mobile communication system, this mobile communication system comprises and is used to adopt the base station that sends diversity and dedicated channel data public through at least two antenna transmission forward directions.A plurality of travelling carriages in the area of coverage of this one day this base station of alignment, base station send the message of the non-TSTD send mode of expression TSTD/.Then, the message that each travelling carriage analysis receives from this base station, and be set to the non-TSTD mode of TSTD/ according to its receive mode of send mode.

Brief description of drawings

To its DETAILED DESCRIPTION OF THE PREFERRED, will more be expressly understood above-mentioned purpose of the present invention and advantage by the reference accompanying drawing, in the accompanying drawing:

Figure 1A, 1B and 1C are the schematic diagrames of describing according to the TSTD operation of the embodiment of the invention in mobile communication system;

Fig. 2 is according to embodiment of the invention block diagram as the TSTD device of BS and MS parts in the mobile communication system that adopts the TSTD method;

Fig. 3 is used for block diagram through the TSTD transmitter of the BS of two antenna transmission signals according to the embodiment of the invention;

Fig. 4 is the block diagram of TSTD receiver that is used for receiving the MS of TSTD signal according to the embodiment of the invention;

Fig. 5 represents to be used to control according to the embodiment of the invention message of the TSTD mode between BS and the MS;

Fig. 6 is the flow chart that is used for by exchanging messages and receive mode is set and receives the MS operation of traffic channel data with MS;

Fig. 7 is the flow chart that is used for by exchanging messages and send mode is set and sends the BS operation of traffic channel data with BS;

Fig. 8 A represents to be sent to by BS the form of the broadcast of a plurality of MS;

Fig. 8 B represents to be sent to by MS the form of the access message of BS; With

Fig. 8 C represents to be sent to by BS the form of Common Control Channel (CCCH) message of MS.

Detailed description of preferred embodiment

Below will detailed preferred embodiment with reference to the accompanying drawings to describe the present invention.Be noted that the detailed description that to omit known function of the present invention or structure, with the theme of the present invention of avoiding confusion.

Transmission and receiving control message processing procedure that BS transmitter and MS receiver are used to send and receive the TSTD traffic channel data will be described below.

Be understood that, in the following description, forward common channels (as Common Control Channel and CTCH Common Traffic Channel) is the channel that can be received by all MS in the sub-district, and forward dedicated channel (as Dedicated Control Channel and Dedicated Traffic Channel) is the channel that only can be received by a specific MS.

The present invention will provide the TSTD in a kind of mobile communication system apparatus and method, in this mobile communication system, BS is with one at least two transmitting antennas of time-division switching mode selection, sending public and/or dedicated channel signal according to the switch mode control signal, and MS receives the TSTD signal.

The invention still further relates to the operation of the public and dedicated channel of when mobile communication system is supported TSTD function as optional or essential function forward direction.

If it is supported that TSTD is used as essential function, then all BS in this system and MS can adopt the TSTD mode to carry out data communication.Therefore, TSTD can be applicable to the public and dedicated channel of forward direction.More particularly, TSTD is applied to forward common channels inevitably, and is applied to forward dedicated channel more neatly.Under normal condition, forward dedicated channel is communicated by letter in the TSTD mode, and during handover or according to the state of BS or MS, communicates by letter in non-TSTD mode.

If it is supported that TSTD is used as optional feature, then in system, TSTD BS and MS and non-TSTD BS and MS coexist.In this case, TSTD can be applied to the public and dedicated channel of forward direction in many ways.Because forward common channels is shared by all MS in the sub-district, therefore, if next generation mobile communication standard code BS should support the TSTD function, then MS should receive the TSTD signal from BS.Under the forward dedicated channel situation, if BS and MS all can support TSTD, then use TSTD, and communicate by letter when essential when non-TSTD mode BS or MS think when resembling at handover, discharge TSTD.If at least one among BS and the MS do not supported the TSTD function, then TSTD can not be applied to forward dedicated channel.

Be described in all have as the BS of the TSTD function of essential function and the forward direction between the MS is public and the operation of dedicated channel before, have description as the BS of the TSTD function of optional feature and have operation public as the forward direction between the MS of the TSTD function of essential function and dedicated channel.Receive signal owing to receive the TSTD sending mode of TSTD signal indication from BS from different paths, therefore, the receiving mode identical with sending mode is set preferably, and estimates channel according to BS.

Figure 1A and 1B have described according to the embodiment of the invention has the operation as the TSTD in the mobile communication system of the TSTD of optional feature.Figure 1A is illustrated in channel support under the situation that BS supports TSTD/do not support, and Figure 1B is illustrated in channel support under the situation that BS do not support TSTD/do not support.What Figure 1A and 1B represented is the forward channel that TSTD is applied to comprise BCCH (Broadcast Control Channel), CCCH (Common Control Channel), TCH (Traffic Channel), and this depends on whether BS and MS support TSTD.Dash box expresses support for those channels of TSTD.For example, with reference to Figure 1A, the figure shows the TCH channel support when BS and MS both support TSTD.

As above summary, forward channel is defined as follows.BCCH is that BS is broadcast to identical information the common signal channel of a plurality of MS thereon, CCCH is that BS sends the common signal channel of beep-page message, channel specify message etc. to specific MS thereon, and TCH is that BS sends the dedicated channel of user profile or signaling information to specific MS thereon.RACH (Random Access Channel) (not shown) is that MS sends the Reverse Access Channel of data to BS thereon.

Under the situation of TSTD BS and MS and non-TSTD BS and MS coexistence, according to the mode of operation of BS and MS be provided with BS each transmitting channel (that is) send mode, BCCH, CCCH, TCH, as described in Table 1:

(1) when BS and MS all support TSTD, TSTD is applied to forward direction BCCH.Although TSTD shall not be applied to other Common Control Channel basically,, when in system when essential, it can be applied to them with limited mode during being assigned to the period of MS.TSTD is applied to forward dedicated channel selectively.

(2) when only having BS to support TSTD, TSTD shall not be applied to all forward channels.

(3) when only having MS to support TSTD, TSTD shall not be applied to all forward channels.

(4) when not supporting TSTD for one among BS and the MS, TSTD shall not be applied to all forward channels.

First embodiment: BS and MS support TSTD

In one embodiment of the invention, BS and MS all support TSTD (referring to Figure 1A, LHS).In the mobile communication system that has as the TSTD of optional feature, only when BS and MS all support TSTD, just TSTD is applied to forward channel.

Although forward direction BCCH points to the nonspecific MS in the sub-district, if all corresponding M S all can receive TSTD, preferably BS sends BCCH in the TSTD mode.The forward direction BCCH that is received by a plurality of MS is considered to be appointed as temporarily and is exclusively used in the channel that sends data in scheduled time slot to specific MS.Therefore, TSTD is applied to forward direction CCCH selectively.

The TSTD device that is used for controlling the TSTD operation in mobile communication system must place BS10 and the MS12 of Fig. 2 as additional firmware.

With reference to Fig. 2, BS10 comprises: BS transmitter 14, be used for when when the BS controller receives control signal, and send broadcast, beep-page message and business datum (speech, data and signaling) by BCCH, CCCH and TCH; BS receiver 16 is used for receiving message through RACH from MS12; With BS controller 18, be used for to/from BS transmitter 14 and BS receiver 16 transmission/received signals, and be used to control the operation of BS10.

MS12 comprises: MS receiver 20 is used for receiving data through BCCH, CCCH and TCH from BS transmitter 14; MS controller 24 is used for carrying out data communication with MS receiver 20 and MS transmitter 22, and the data communication of control and BS10.

The TCH transmitter (not shown) that is positioned at BS transmitter 14 for example is used for realizing the transmission diversity.When being provided as between BS and the MS under the mutual agreement situation of communication standard, TSTD can be applicable to other channels.TCH receiver (not shown) in the MS receiver 20 receives the data-signal that is sent in the TSTD mode by a plurality of antennas by BS.BS controller 18 control BS transmitter 14 sends message by BCCH to MS12, and whether notice MS supports the TSTD mode in BS.Then, by analyzing the BCCH message that receives from BS10, MS12 is provided with its receive mode.For example, if send mode is TSTD, then MS12 also its receive mode be set to TSTD, and if send mode is non-TSTD, then MS12 also its receive mode be set to non-TSTD.Where necessary, MS12 can send message to BS10 through RACH, and whether notice MS12 supports the TSTD mode.

Message between BS and the MS

With reference to first embodiment (table 1, row 1) describing message exchange process, at this moment, BS10 and MS12 all support TSTD below.With reference to table 1, only work as BS10 and MS12 and support that all under the situation of TSTD, TSTD just can be applicable to forward direction TCH.

In operation, BS controller 18 sends BS send mode information to BS transmitter 14.For example, it sends to comprise whether expression BCCH transmitter supports the control data of the send mode information of TSTD mode to BS transmitter 14, and when supporting the TSTD mode, controller additionally sends TSTD pattern (pattem).Under the control of BS controller 18, BS transmitter 14 sends control data through BCCH to MS12.

MS receiver 20 is analyzed the send mode information that receives from BS10 through BCCH.MS controller 24 is analyzed this send mode information, and sends receive mode information to MS transmitter 22.MS transmitter 22 sends MS receive mode information through RACH to BS10.BS receiver 16 will send to BS controller 18 through the MS receive mode information that RACH receives, and BS controller 18 produces control signal according to BS send mode information and MS receive mode both information, with the operation of control BS transmitter 14, shown in Figure 1A and 1B.

Meanwhile, MS controller 24 produces a control signal according to MS receive mode information and BS send mode both information, with the operation of control MS receiver 20.BS transmitter 14 sent the message that is used to be provided with TCH through CCCH to MS receiver 20 before specifying TCH.After specifying TCH, BS transmitter 14 sends user or signaling information through TCH to MS receiver 20 with selected send mode.

Following description will more help to understand the operation of determining transmission/receive mode by the call treatment message between BS10 and MS12.

Fig. 3 is the block diagram of the TSTD transmitter in the BS transmitter 12 of the illustrative examples according to the present invention, and this TSTD transmitter is used for through two antenna transmission signals.In the drawings, not shown transmission/receiving filter.It being understood that in an alternative embodiment, number of antennas can become more than two.In general, no matter the number of antennas of using how, each antenna use different pilot channels (in some cases, in cdma system, use be the frequency pilot sign that once sends through an antenna, rather than pilot channel).

Among Fig. 3, the user data UD of 102 pairs of inputs of encoder encodes, 104 pairs of channel-encoded data of interleaver interweave, the serial data stream that serial converter (SPC) 106 will interweave is divided into the symbol of odd-numbered and the symbol of even-numbered, with it respectively as I channel signal and Q channel signal.Walsh (Walsh) and PN expander (back claims expander) 108 adopts walsh code that I and Q channel signal are carried out quadrature modulation, and the signal that adopts the PN sequence that quadrature modulation is crossed is expanded.First and second switches 110 that the I of expansion and the separated ground feed-in of Q channel data all have first and second outputs and 111 input.First and second switches 110 and 111 first and second outputs are connected to each two inputs in first and second modulators 114 and 116, these two modulators 114 and 116 are used for adopting cosine wave (cos Wct) and sinusoidal wave (sin Wct) that I and Q channel data are modulated with modulating frequency, with the addition of gained data.

According to the switch mode control data that receives from the first switch expander 112 first and second switches 110 and 111 are switched, to send I and the Q channel data that receives from expander 108 through antenna ANT1 and ANT2 according to time-division switch mode control signal.It should be understood that data will not send (referring to project 113,144) through antenna ANT1 and ANT2 simultaneously.This switch mode control signal is to produce according to the control signal that receives from BS controller 18.This control signal is whether to be supported the BS send mode information of TSTD mode and determined through the message that RACH receives from MS12 by expression BS10.

Switch mode control signal pattern can be classified as follows usually:

(1) first switch mode: first and second switches 110 and 111 are limited in antenna ANT1;

(2) second switch modes: first and second switches 110 and 111 are limited in antenna ANT2;

(3) the 3rd switch modes: first and second switches 110 and 111 begin to switch between antenna ANT1 and ANT2 from antenna ANT1; With

(4) the 4th switch modes: first and second switches 110 and 111 begin to switch between antenna ANT1 and ANT2 from antenna ANT2.

First and second switch modes are exclusively used in non-TSTD mode, and third and fourth switch mode is exclusively used in the TSTD mode.In non-TSTD mode, between first and second switch modes, select according to channel type.In the TSTD mode, select between third and fourth switch mode according to channel type, as described later.

Fig. 4 is the block diagram of TSTD receiver that is used for receiving the MS12 of TSTD signal according to the embodiment of the invention.In Fig. 4, demodulator 202 adopts cosine wave (cos Wct) and sinusoidal wave (sin Wct) that the signal that receives through reception antenna is carried out demodulation, and output I and Q channel data.The I and the Q channel data of 204 pairs of demodulation of plural number PN despreader (back claims despreader) carry out despreading.First and

second channel corrector

206 and 208 are estimated the error of I and Q channel data, and primary reception value and these errors are multiplied each other.

Selected by switch 210 from the correction data of first and

second adjusters

206 and 208 outputs, switch 210 switches according to the switch mode control signal that produces from second switch controller 212.This switch mode control signal with produce from the TSTD transmitter and according to MS receive mode information and identical from the determined signal of message that BS10 receives through BCCH.

Parallel/the serial converters (PSC) 214 that is connected to the output node of switch 210 will be switched the channel correction parallel data of importing and be transformed into serial data.This serial data is by deinterleaver 216 deinterleavings of the output node that is connected to PSC214.The data of 218 pairs of deinterleavings of decoder are decoded, and decoded data is exported as user data (UD).

To simply describe Fig. 5-8 below, be described in detail with reference to Fig. 2-8 afterwards.

Fig. 5 is illustrated in the schematic diagram that exchanges messages between BS and the MS and flow with the message of controlling the TSTD mode, Fig. 6 is used for by carrying out the flow chart that message is provided with receive mode and receives the MS operation of TSTD message with BS, and Fig. 7 is used for by carrying out the flow chart that message is provided with send mode and sends the BS operation of traffic channel data with MS.

Fig. 8 A represents to be sent to by BS the form of the broadcast of a plurality of MS, and Fig. 8 B represents to be sent to by MS the form of the access message of BS, and Fig. 8 C represents to be sent to by BS the form of the CCCH message of MS.

With reference to Fig. 2 to 8C, will be described in detail in below have as (1) the TSTD mode in the mobile communication system of the TSTD of optional feature be provided with, the transmission and the reception of (2) TSTD data.

When operation has the mobile communication system of transmitting channel structure as shown in Figure 2, the BS controller 18 control BS transmitters 18 of BS10, make it to send the broadcast of Fig. 8 A, describe in detail as the step 502 of Fig. 5 and the step 602 of Fig. 6 through BCCH all MS receivers 20 in the area of coverage of BS10.This broadcast comprises send mode and other information of type of message, BS10.BS send mode value representation be that the BS send mode is also right and wrong TSTD of TSTD.BS controller 18 determines also whether BS receiver 16 has received the receive mode information of MS12 by RACH.

With reference to Fig. 2, if connect the power supply of MS12 in BS10 operation, then in the step 702 of Fig. 7, MS controller 24 control MS receivers 20 to be obtaining pilot signal or channel is provided synchronously from BS transmitter 14, and make its sequential and BS10 synchronous.In step 704, MS12 receives the information of relevant BS10 through BCCH.This information comprises TSTD mode information.At 706 of the step 504 of Fig. 5 and Fig. 7, MS transmitter 22 sends to BS receiver 16 through RACH and inserts message, shown in Fig. 2 and 8B.Insert message to sign in to BS10 by sending through RACH, MS10 logins MS (being receive mode) to BS10, and passes through this login process to the information (referring to Fig. 8 B) of BS10 notice about MS12.RACH information comprises TSTD mode information.

Whether then, BS controller 18 and MS controller 24 are analyzed respectively and are inserted message and broadcast, feasible to determine TSTD communication.If can carry out this communication, then BS10 and MS12 carry out Traffic Channel foundation in the step 506 of Fig. 5, and come their TSTD transmitter and receivers separately of control chart 3 and 4 in response to determined TSTD switch mode control signal in the mode of operation of determining.The mode of operation that this is determined will be described below in more detail.

In the step 604 of Fig. 6, BS controller 18 is analyzed the receive mode of MS12 through RACH, and determines whether to receive the TCH specified request through RACH from MS in the step 606 of Fig. 6.When receiving the TCH specified request from MS12, BS controller 18 enters step 608.Otherwise, the TCH specified request that BS controller 18 is waited on the RACH.

In step 608, when receiving the TCH specified request, BS controller 18 determines whether to specify TCH.If available TCH is arranged, then BS controller 18 is specified TCH, and by through the message of CCCH to MS12 transmission Fig. 8 C, notifies the TSTD pattern to MS12.CCCH message can comprise TSTD mode change information and TSTD pattern information.Here, TSTD mode change information is the field that expression TSTD mode conversion when BS does not want to use the TSTD mode becomes non-TSTD mode.The TSTD pattern field provides expression is alternately sent data through antenna ANT1 and ANT2 by BS10 TSTD pattern.The TSTD mode changes field and the TSTD pattern field is chosen wantonly.

In step 612, BS controller 18 determines according to the receive mode field of received RACH information whether MS12 is arranged to the TSTD mode.If MS12 is in the TSTD mode, then BS controller 18 is according to default mode information, send to the TSTD pattern information of MS12 or in the definite pattern information provides a control signal to first on-off controller 112 by the ESN (Electronic Serial Number) of MS12 through CCCH, and sends TCH under the TSTD mode.Here, suppose that no TSTD mode changes.First on-off controller 112 is controlled the output of first and second switches 110 and 111 according to the switch mode control signal that receives from BS controller 18, and to carrying out the time-division switching from I and the Q channel data that expander 108 receives, shown in the label 115 and 117 of Fig. 3 through antenna ANT1 and ANT2.It should be understood that the TSTD pattern is based on that shift mode information changes.

In step 616, BS controller 18 determines whether TCH is released during sending.If TCH is released, then BS controller 18 turns back to step 606.If MS12 is not set to the TSTD receive mode in step 612, then in step 618, BS controller 18 sends TCH in non-TSTD mode to MS12.Transmission in non-TSTD mode means BS controller 18 controls first on-off controller 112, only is limited in the input of first or second modulator 114 or 116 with the output with first and second switches 110,111.

Meanwhile, in step 707, MS12 determines whether to send the TCH specified request.When producing the TCH specified request, in step 708, MS controller 24 sends TCH specified request message through RACH to BS10, receives CCCH message in step 709, to determine whether to specify TCH in step 710.If do not specify TCH in step 710, then MS controller 24 turns back to step 707.

If specified TCH, then in step 712, MS controller 24 determines whether the send mode of BS10 is the TSTD mode.If BS10 is set to the TSTD mode, a feed-in second switch controller 212 in the TSTD pattern information determined by its ESN of the TSTD pattern information in MS controller 24 the CCCH message that (1) default TSTD pattern information, (2) are received or (3) then.Second switch controller 212 is controlled third and fourth switch 110 and 111 according to received control signal, makes it to switch based on the TSTD switch mode of BS10.Therefore, the switch mode that the MS12 basis receives from BS10 is controlled the output of first and

second channel corrector

206 and 208, to provide continuous I and Q channel data stream to parallel/serial converters (PSC) 214.Here, the output of PSC214 is carried out deinterleaving by deinterleaver 216, and reverts to initial data by decoder 218.

If during TCH sends, between each BS, handover occurs, then between new BS and MS, reassign TCH, and TSTD mode information is notified to new BS by posting a letter to original BS.Therefore, can realize that the TSTD mode is controlled and no matter handover whether occurs.During handover, two BS can be with the instantaneous transmission of non-TSTD mode, even they support the TSTD mode.

According to the first embodiment of the present invention, if BS10 and MS12 all support TSTD, then BS10 determines to send in the TSTD mode, specifies TCH, and sends TCH message in the TSTD mode.MS12 analyzes BCCH message and the CCCH message that receives from BS10, and receives TCH message in the TSTD mode.

The TSTD pattern, i.e. switch mode between two antennas can be a default mode, the pattern of being determined by the ESN of MS or the pattern of being determined by BS.Will communicate between BS and MS to determine the information of this pattern if having, the TSTD pattern information can send in the TSTD pattern field of the CCCH of Fig. 8 C message.If this pattern is definite by the ESN of MS, then MS sends its ESN to BS at first.If this pattern is to determine that by BS then BS can send to MS with its required mode.

During call setup, the message relevant with sending diversity sends through forward common channels, and after call setup in communication period through dedicated channel, this message sends through Forward Dedicated Control Channel.Determine the TSTD pattern for unique number by MS, MS sends resemble ESN its unique number to BS.If this pattern determines that by BS BS can send to MS with its required mode so.

If TSTD is optional to BS, it then should be essential to MS.In order to understand the operation of the public and dedicated channel of forward direction between these BS and MS better, will concentrate in scope of the present invention and the aim with the difference that has as the mobile communication system of the TSTD of optional feature.

To be expression have schematic diagram as TSTD method of operation in the mobile communication system of the TSTD of essential function according to another embodiment of the present invention to Fig. 1 C.TSTD is public to forward direction to be shown among this figure with application dedicated channel.What shaded block was represented is that TSTD uses.

If TSTD is optional to BS, then must notify BS whether to support TSTD by BCCH.If MS receives the information that expression BS sends in the TSTD mode, then it can receive the BS signal in the TSTD mode.For example, when BS in this system sent the public and dedicated channel of forward direction in the TSTD mode, TSTD only can be applied to forward common channels.More particularly, share by all MS in the BS area of coverage, therefore, must use them and send diversity owing to comprise the forward common channels of BCCH and CCCH.Synchronous in order to carry out more accurately, MS can receive TSTD from BS channel is provided synchronously by determining whether to adopt the TSTD mode according to BCCH message.Sending another example that channel is provided synchronously in the TSTD mode can occur under the situation below, in this case, employed fundamental sum auxiliary synchronization channel when TSTD shall not be applied between each BS and to carry out fast cell search with asynchronous system, and these channels send by single transmitting antenna.MS produces information switching time that is used for the TSTD mode by the temporal information that provides channel to obtain synchronously from this is provided.TSTD is applied to forward dedicated channel basically, and when BS or MS need or during handover, be released.Whether TSTD to be applied to forward dedicated channel predetermined in system, or during the call setup by through Common Control Channel or between BS and MS, exchanging messages to determine through Dedicated Control Channel during calling out.

What the present invention relates to as mentioned above, is to support the service as the TSTD under the TSTD situation of optional and essential function in CDMA mobile communication system.

As TSTD when being essential, can be applied to the public and dedicated channel of forward direction with sending diversity, this is because all BS and MS all can carry out data communication by TSTD.TSTD must be applied to forward common channels.TSTD is applied to forward dedicated channel basically, and can or be released during handover when BS or MS need.

When TSTD when optional, in system, TSTD BS and MS can with non-TSTD BS and MS coexistence.In this case, TSTD can be applied to the public and dedicated channel of forward direction in many ways.Because forward common channels is shared by all MS in the sub-district, therefore, if BS can support the TSTD function, MS should be able to receive the TSTD signal from BS, especially TSTD CCCH signal.Under the forward dedicated channel situation, if BS and MS all can support TSTD, then use TSTD basically, and can be released when essential thinking that as BS or MS non-TSTD mode is communicated by letter during handover.If at least one among BS and the MS do not supported the TSTD function, then TSTD can not be applied to forward dedicated channel.

In various embodiments of the present invention, when when BS sets up the TSTD mode through RACH receives MS receive mode information from MS12 after, this process can be revised.That is if MS can adopt TSTD and non-TSTD mode, then MS can be by automatically being provided with its receive mode according to the BCCH message analysis BS send mode that receives from BS.

By adopting TSTD of the present invention operation control procedure, in the mobile communication system that has as the TSTD function of optional feature, the TSTD device can be operated with non-TSTD device compatiblely.When sending data in the TSTD mode, the performance the best that can make data send and receive.

In the mobile communication system of the TSTD function with the essential function of conduct, TSTD is applied to comprising the Forward Common Control Channel of BCCH.Therefore, can farthest utilize the advantage of TSTD function.

Although described the present invention with reference to specific embodiment, this only is an exemplary application.Therefore, should be understood that clearly that the one of ordinary skilled in the art can carry out multiple variation in scope of the present invention and aim.

Claims

1. TSTD (time-division switch send diversity) control method in mobile communication system with a base station (BS), wherein this BS is through at least two public and dedicated channel data of antenna transmission forward direction, and this method comprises the following steps:

Described BS sends the message of the non-TSTD send mode of expression TSTD/ by a plurality of travelling carriages (MS) in the area of coverage of one day described BS of alignment; With

Each MS analyzes the message that receives from described BS, and according to described send mode receive mode is arranged to the non-TSTD mode of TSTD/.

2. the method for claim 1, wherein described forward common channels is Broadcast Control Channel (BCCH) and Common Control Channel (CCCH).

3. the TSTD control method in the mobile communication system of a plurality of MS in the area of coverage with a BS and this BS comprises the following steps:

Described BS is by at least two antenna transmission forward common channels, and described forward common channels comprises the message of the non-TSTD send mode of expression TSTD/; With

MS in the described BS area of coverage analyzes the forward common channels message that receives from described BS, and according to described send mode receive mode is arranged to the non-TSTD mode of TSTD/.

4. method as claimed in claim 3, wherein, described forward common channels is BCCH.

5. TSTD control method in the mobile communication system that comprises a BS and a plurality of MS, wherein, described BS sends by forward direction BCCH, CCCH and TCH (Traffic Channel), and described a plurality of MS send by Reverse Access Channel, and described method comprises the following steps:

Described BS will represent that the broadcast of the send mode on the described BCCH sends to described MS;

In response to described broadcast, described MS sends the access message of expression receive mode by described Reverse Access Channel; With

If the receive mode information representation that receives through described Reverse Access Channel is the TSTD mode, then described BS sends traffic channel data in the TSTD mode.

6. method as claimed in claim 5, wherein, described BCCH and CCCH are by at least one antenna transmission.

7. TSTD control device in the mobile communication system that comprises a BS and a MS, wherein, described BS has at least two different channels with MS, and carries out the communication of control messages through each channel, and described TSTD control device comprises:

The BS device, it has a controller, is used for when the MS receive mode is the TSTD mode, produces the switch-over control signal with AD HOC, has no time overlapping to send data by at least two antennas of order switching in the TSTD mode; With

The MS device, it has a receiving key, is used for switching in response to described switch-over control signal when the BS send mode is the TSTD mode.

8. device as claimed in claim 7, wherein, described AD HOC is to adopt to determine for unique number of described MS.

9. device as claimed in claim 8, wherein, described AD HOC is the switch mode of being determined by described BS, and described MS determines to receive switch mode by receive described switch mode through Common Control Channel.

10. device as claimed in claim 7, wherein, described BS device also comprises a transmitter, is used for through being used for sending the message of representing send mode to the BCCH of a plurality of MS transmission public informations.

11. device as claimed in claim 7, wherein, when described MS detected TSTD information according to the broadcast that receives from described BS through a Common Control Channel, described MS device sent receive mode information through a Reverse Access Channel.

12. device as claimed in claim 7, wherein, described BS device is provided with the TSTD mode of transmitter according to the message of the expression MS receive mode that receives through described Reverse Access Channel.

13. the TSTD control device in the mobile communication system with TSTD function comprises:

The BS device is used for sending forward common channels in the TSTD mode; With

The MS device is used for receiving described forward common channels in the TSTD mode.

14. device as claimed in claim 13, wherein, described forward common channels is a broadcast channel.

15. device as claimed in claim 13, wherein said forward common channels are that channel is provided synchronously.

16. the TSTD control method in the mobile communication system with TSTD function comprises:

BS sends forward common channels and the forward dedicated channel that comprises BCCH in the TSTD mode; With

MS receives described forward common channels in the TSTD mode.

17. method as claimed in claim 16, wherein, described forward common channels is that channel is provided synchronously.

18. method as claimed in claim 16 also comprises the step that does not send described forward dedicated channel by exchange control messages between described BS and MS in the TSTD mode.

19. method as claimed in claim 16 also comprises being used for being transmitted control message to described BS through a reverse control channel by described MS, request should stop the step of the transmission of the described forward dedicated channel of transmission of carrying out in the TSTD mode.

20. method as claimed in claim 16 comprises that also described BS transmits control message to described MS through a forward control channel, stops the step that the TSTD on the described forward dedicated channel sends with expression.

21. the signal acceptance method in the MS of mobile communication system comprises the following steps:

By analyzing the signal that receives from BS, determine whether described BS sends with the TSTD send mode; With

If a signal sends with described TSTD send mode, then receive described signal from described BS with the TSTD receive mode.

22. method as claimed in claim 21, wherein, the signal that receives from described BS is a common channel signal.

23. method as claimed in claim 22, wherein, described common signal channel is that channel is provided synchronously.