CN101162984A - Mobile terminal access method of TDD communication system - Google Patents
Mobile terminal access method of TDD communication system Download PDFInfo
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Abstract
The invention discloses the access method of the mobile terminal of a time division duplex communication. The mobile terminal maintains synchronization with a base station and a wireless digital repeater; the mobile terminal receives the broadcast signals of the base station and the broadcast signals of of the wireless digital repeater; the mobile terminal determines an access method according to the received cell broadcast information of the base station and / or the cell broadcast information transmitted by the wireless digital repeater, when the access of the mobile terminal is permitted by both the base station and the wireless digital repeater, the access method is determined according to the quality of a channel and the type of a service. With the invention, a frame structure ensures that the access signals between the mobile terminal and the wireless repeater are not affected by the interference of the signals transmitted by neighboring base stations.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to the slot allocation method of wireless digital repeater of tdd communication systems and the cut-in method of portable terminal.
Background technology
The technical report TR 25.924V1.0.0 (1999-12) of 3G (Third Generation) Moblie collaborative project (the 3GPP:3rd Generation PartnershipProject) multiple access of the opportunity driven " insert (Opportunity Driven Multiple Access) " be standardization body provide the earliest about digital relay apparatus being applied to the discussion of GSM; The WINNER that informationized society technology afterwards (IST:Information Society Technologies) research organization sets up (Wireless World Initiative New Radio) project research report " IST-2003-507581WINNER D3.4, the honeycomb based on relaying that is used for following wireless solution is laid definition of conception and assessment (Definition and assessment of relaybased cellular deployment concepts for future radio scenariosconsidering 1st protocol characteristics) " has been carried out comprehensive assessment to existing various wireless digital repeater structures, the various existing layout scheme that strengthens the cellular system professional ability with wireless digital repeater. Report C80216mmr-05_001, KDDI, " IEEE802.16 mobile multi-hop relaying research (Study of IEEE 802.16MobileMulti-hop Relay) " shows that present IEEE802.16e normal structure has begun to support the technical specification discussion of mobile multi-hop relaying (MMR:Mobile Multi-hop Relay).
Mobile relaying and fixed relay have been contained in the research of existing wireless digital repeater, double bounce relaying and multi-hop relay, and time division duplex relaying, Frequency Division Duplexing (FDD) relaying and Frequency Division Duplexing (FDD) are converted to the time division duplex relaying, aspects such as point-to-point relaying and point-to-multipoint relaying.In numerous wireless digital relay operational versions, double bounce fixed wireless digital junction is the most a kind of mode of approaching practicality.The simulation result that the report of wireless world research forum (WIRELESS WORLD RESEARCHFORUM) " based on the wireless of relaying and mobile broadband networking notion (Relay-Based Deployment Concepts for Wireless and MobileBroadband Radio) " provides the fixed wireless repeater of double bounce shows: use double bounce fixed wireless digital repeater that the covering radius of network is enhanced about more than once, cell capacity is enhanced about more than once.The TDD system is the system that is easy to adopt wireless digital repeater, document Eustace K Tameh Andrew Nix, et al Centre forCommunications Research, University of Bristol, Woodland Road, Bristol BS8 1UB, U.K " uses the fixed repeater of flexible arrangement to improve time division duplex wireless access performance (The Use of Intelligently Deployed Fixed Relays toImprove the Performance of a UTRA-TDD System) ", T.J.Harrold andA.R.Nix, Centre for Communications Research, University of Bristol, Queens Building, University Walk " performance evaluation (Performance Analysis of IntelligentRelaying in UTRA TDD) that divides the fixed repeater of flexible arrangement in the duplex wireless connecting system " introduces the method for fixed wireless digital repeater from field survey and theoretical two aspects to the TDD system and the improvement ability of performance is analyzed.
Fang-Ching Ren, Chang-Lung Hsiao in the point to multipoint mode of the compatible tdd frame structure " suggestion (Recommendation on PMP (Point to MultiPoint) ModeCompatible TDD Frame Structure) " that IEEE 802.16 delivers in the 39th meeting (Session#39) that hold in the Taibei, provide introduce wireless fixed relay in a kind of TDD of the being applicable to system frame structure as shown in Figure 1.(a) comprises not in the service range of repeater among Fig. 1, the terminal that needs the base station directly to support; The terminal that terminal is supported by repeater in the service range of repeater.The radio frames 101 that (b) provides among Fig. 1 comprises a descending sub frame 102 and a sub-frame of uplink 103.Descending sub frame 102 comprises P (preamble) time slot (leading time slot), frame control head portion (FCH) time slot, downlink frame control time slot (DL-mobile application part (MAP)), BR (base station (Basestation) is to repeater (Relay)) time slot, BM (base station is to portable terminal (Mobileterminal)) time slot, RM (repeater is to portable terminal) time slot; Sub-frame of uplink 303 comprises C (Contention: fight for) time slot, MR (portable terminal is to repeater) time slot, MB (portable terminal is to the base station) time slot, RB (repeater is to the base station) time slot.Structure of time slot in the radio frames 101 shows: repeater belongs to descending sub frame 102 and sub-frame of uplink 103 to the transmission time slot RM of portable terminal and repeater respectively to the transmission time slot RB of base station, and this shows that repeater is to finish the emission of base station and repeater to the emission of terminal in different time slots.
A shortcoming of existing fixed TDD (time division duplex) wireless digital repeater and application mode (frame structure) thereof is: 1) this shows that repeater is to finish the emission of base station and repeater to the emission of terminal in different time slots, do not support concurrent (simultaneously receive and (or) emission simultaneously of donor antenna and retransmitting antenna) work, this just causes the spatial reuse transmission potentiality of two hopscotch not excavate, the availability of frequency spectrum is low, in addition, the directivity that the donor antenna of fixed repeater and retransmitting antenna have is not utilized effectively, and several base stations is synchronously brought larger interference to the emission meeting of this sub-district to the terminal of adjacent sub-district; 2) fight for time slot C immediately following in the descending time slot back, can be subjected to the interference of downstream signal multipath, this can cause the failure that inserts.
Therefore, need a kind of technical scheme, can prevent that the access signal between portable terminal and the wireless digital repeater is subjected to the interference of adjacent base station transmit signals.
Summary of the invention
Main purpose of the present invention is to provide a kind of slot allocation method of wireless digital repeater of tdd communication systems and the cut-in method of portable terminal, is used to guarantee that access signal between portable terminal and the wireless digital repeater is not subjected to the interference of adjacent base station transmit signals.
To achieve these goals, according to a first aspect of the invention, the invention provides a kind of slot allocation method that is used for the wireless digital repeater of tdd communication systems.Slot allocation method may further comprise the steps: the time slot that the emission cell broadcast information is set; In the part or all of time slot of base station reverse link traffic channel correspondence, wireless digital repeater is set to transmit simultaneously towards the port of base station with towards the port of portable terminal; In the part or all of time slot of base station down Traffic Channel correspondence, wireless digital repeater is set to received signal simultaneously towards the port of base station with towards the port of portable terminal.
Preferably, the time slot of the time slot of the emission cell broadcast information of wireless digital repeater and transmitting downstream synchronizing signal is set in time do not have and overlaps with the time slot of the time slot of the emission cell broadcast information of base station and transmitting downstream synchronizing signal.
Preferably, corresponding to the time slot of wireless digital repeater towards the uplink synchronizing signals of the mobile terminal receive emission of the port of portable terminal, wireless digital repeater is set to not transmit or be in accepting state towards the port of base station.
Alternatively, in the frame structure of wireless digital repeater with the frame structure of tdd communication systems in the emission cell broadcast information time slot, descending pilot frequency time slot, time slot, part that uplink pilot time slot is corresponding are set to keep idle at interval, will insert the time slot, descending pilot frequency time slot of the emission cell broadcast information of wireless digital repeater, time slot, uplink pilot time slot at interval in the ascending time slot time slot corresponding in the frame structure of wireless digital repeater with in the frame structure of tdd communication systems.
Alternatively, under the frame structure of tdd communication systems is configured to situation that uplink pilot time slot is positioned at an ascending time slot back, with in the frame structure of wireless digital repeater with the frame structure of tdd communication systems in the time slot of emission cell broadcast information, descending pilot frequency time slot, the interval time slot, it is idle that (may also have uplink pilot time slot) corresponding part is set to keep, to insert the time slot of the emission cell broadcast information of wireless digital repeater in ascending time slot time slot corresponding in the frame structure of wireless digital repeater with in the frame structure of tdd communication systems, descending pilot frequency time slot, time slot at interval will insert the uplink pilot time slot of wireless digital repeater in the uplink pilot time slot time slot corresponding in the frame structure of wireless digital repeater with in the frame structure of tdd communication systems.
Alternatively, under the frame structure of tdd communication systems is configured to situation that uplink pilot time slot is positioned at an ascending time slot back, with in the frame structure of wireless digital repeater with the frame structure of tdd communication systems in the time slot of emission cell broadcast information, descending pilot frequency time slot, the interval time slot, it is idle that the part of uplink pilot time slot correspondence is set to keep, and will insert the time slot of the emission cell broadcast information of wireless digital repeater in the ascending time slot time slot corresponding in the frame structure of wireless digital repeater with in the frame structure of tdd communication systems, descending pilot frequency time slot, the interval time slot, uplink pilot time slot.
To achieve these goals, according to a second aspect of the invention, the invention provides a kind of cut-in method of portable terminal of tdd communication systems, the wireless digital repeater in the tdd communication systems adopts above-mentioned slot allocation method.Cut-in method may further comprise the steps: portable terminal and base station and wireless digital repeater keep synchronously; Portable terminal receives the broadcast singal of base station and the broadcast singal of wireless digital repeater; Portable terminal decides access way according to the cell broadcast information of base station cell broadcast message that receives and/or wireless digital repeater emission, when base station and wireless digital repeater all allow to insert, according to channel quality and professional type decided access way.
Alternatively, if the channel quality of base station is better than wireless digital repeater, perhaps do not have the signal of wireless digital repeater, then the portable terminal access base station sends uplink synchronizing signals and inserts request signal to the base station in the time slot of base station frame structure regulation.
Alternatively, if the channel quality of base station is not as wireless digital repeater, perhaps do not have signal of base station, then portable terminal inserts wireless digital repeater, sends uplink synchronizing signals and inserts request signal to wireless digital repeater in the time slot of wireless digital repeater frame structure regulation.
Alternatively, the ascending time slot of base station that will be corresponding with the uplink pilot time slot of wireless digital repeater is as standby time slot.
Alternatively, the uplink pilot time slot that makes the base station is immediately following in reverse link traffic channel time slot back, makes being arranged on less than the reverse link traffic channel of the portable terminal of particular value in the uplink pilot time slot time slot corresponding with wireless digital repeater to the distance of base station of part or all.
Pass through technique scheme, the invention enables the wireless digital repeater frame structure to guarantee that the introducing of wireless digital repeater does not influence the work of existing system and terminal, support the port towards the port of base station and terminaloriented of wireless digital repeater to receive simultaneously and emission a kind of like this " breathing " pattern simultaneously, realizability is strong.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 illustrates the layout and the frame structure of existing fixed wireless digital relay system;
Fig. 2 is the flow chart according to the slot allocation method of wireless digital repeater of the present invention;
Fig. 3 is the flow chart according to the cut-in method of portable terminal of the present invention;
Fig. 4 illustrates according to the embodiment of the invention and wireless digital repeater frame structure TD-SCDMA system frame structure compatibility; And
Fig. 5 illustrates according to the embodiment of the invention and wireless digital repeater frame structure improved TD-SCDMA system frame structure compatibility.
Embodiment
Describe the present invention below with reference to the accompanying drawings in detail.
With reference to Fig. 2, the slot allocation method that is used for the wireless digital repeater of tdd communication systems according to the present invention may further comprise the steps: the time slot that the emission cell broadcast information is set; In the part or all of time slot of base station reverse link traffic channel correspondence, wireless digital repeater is set to transmit simultaneously towards the port of base station with towards the port of portable terminal; In the part or all of time slot of base station down Traffic Channel correspondence, wireless digital repeater is set to received signal simultaneously towards the port of base station with towards the port of portable terminal.
The time slot of the time slot of the emission cell broadcast information of wireless digital repeater and transmitting downstream synchronizing signal is set to not have with the time slot of the time slot of the emission cell broadcast information of base station and transmitting downstream synchronizing signal in time overlaps.
Corresponding to the time slot of wireless digital repeater towards the uplink synchronizing signals of the mobile terminal receive emission of the port of portable terminal, wireless digital repeater is set to not transmit or be in accepting state towards the port of base station.
In the frame structure of wireless digital repeater with the frame structure of tdd communication systems in the emission cell broadcast information time slot, descending pilot frequency time slot, time slot, part that uplink pilot time slot is corresponding are set to keep idle at interval, will insert the time slot, descending pilot frequency time slot of the emission cell broadcast information of wireless digital repeater, time slot, uplink pilot time slot at interval in the ascending time slot time slot corresponding in the frame structure of wireless digital repeater with in the frame structure of tdd communication systems.
Under the frame structure of tdd communication systems is configured to situation that uplink pilot time slot is positioned at an ascending time slot back, with in the frame structure of wireless digital repeater with the frame structure of tdd communication systems in the time slot of emission cell broadcast information, descending pilot frequency time slot, the interval time slot, (perhaps also having uplink pilot time slot) corresponding part is set to keep idle, to insert the time slot of the emission cell broadcast information of wireless digital repeater in ascending time slot time slot corresponding in the frame structure of wireless digital repeater with in the frame structure of tdd communication systems, descending pilot frequency time slot, time slot at interval will insert the uplink pilot time slot of wireless digital repeater in the uplink pilot time slot time slot corresponding in the frame structure of wireless digital repeater with in the frame structure of tdd communication systems.
Under the frame structure of tdd communication systems is configured to situation that uplink pilot time slot is positioned at an ascending time slot back, with in the frame structure of wireless digital repeater with the frame structure of tdd communication systems in the time slot of emission cell broadcast information, descending pilot frequency time slot, the interval time slot, it is idle that the part of uplink pilot time slot correspondence is set to keep, and will insert the time slot of the emission cell broadcast information of wireless digital repeater in the ascending time slot time slot corresponding in the frame structure of wireless digital repeater with in the frame structure of tdd communication systems, descending pilot frequency time slot, the interval time slot, uplink pilot time slot.
With reference to Fig. 3, wherein wireless digital repeater according to the present invention adopts the cut-in method of portable terminal of the tdd communication systems of slot allocation method shown in Figure 2 may further comprise the steps: portable terminal and base station and wireless digital repeater keep synchronously; Portable terminal receives the broadcast singal of base station and the broadcast singal of wireless digital repeater; Portable terminal decides access way according to the cell broadcast information of base station cell broadcast message that receives and/or wireless digital repeater emission, when base station and wireless digital repeater all allow to insert, according to channel quality and professional type decided access way.
If the channel quality of base station is better than wireless digital repeater, perhaps there is not the signal of wireless digital repeater, then the portable terminal access base station sends uplink synchronizing signals and inserts request signal to the base station in the time slot of base station frame structure regulation.
If the channel quality of base station is not as wireless digital repeater, perhaps there is not signal of base station, then portable terminal inserts wireless digital repeater, sends uplink synchronizing signals and inserts request signal to wireless digital repeater in the time slot of wireless digital repeater frame structure regulation.
The ascending time slot of base station that will be corresponding with the uplink pilot time slot of wireless digital repeater is as standby time slot.
The uplink pilot time slot that makes the base station is immediately following in reverse link traffic channel time slot back, makes being arranged on less than the reverse link traffic channel of the portable terminal of particular value in the uplink pilot time slot time slot corresponding with wireless digital repeater to the distance of base station of part or all.
The present invention is intended to by supporting a kind of so fixed TDD wireless digital repeater structure of donor antenna and concurrent emission of retransmitting antenna and concurrent reception, realize that fixed TDD wireless digital repeater sends data in concurrent mode to base station and portable terminal, and/or realize that base station and portable terminal send data in concurrent mode to repeater, thereby reach following effect: 1) repeater sends time to base station and repeater to portable terminal, receives simultaneously and produced the multiplexing frequency spectrum of two hopscotch, has improved the availability of frequency spectrum; 2) repeater sends time to base station and repeater to portable terminal, receives simultaneously and made full use of the donor antenna of fixed repeater and the directivity that retransmitting antenna has, when several base stations synchronously transmits to this sub-district, do not disturb mutually between the base station, the base station can utilize the directivity of repeater donor antenna and retransmitting antenna to suppress effectively to the interference of the repeater of adjacent sub-district; 3) keep strict forward compatibility, just the frame structure of repeater guarantees the introducing of repeater and meets the system that has standard now that strict compatibility is arranged.
Providing in the frame structure that is applicable to the time division duplex wireless digital repeater 1 in the present invention) wireless digital repeater comprises the time slot of uplink synchronizing signals of time slot, the receiving terminal emission of the time slot of launching cell broadcast information, transmitting downstream synchronizing signal in the transmitting-receiving work schedule of the port of portable terminal; 2) time slot of the time slot of wireless digital repeater emission cell broadcast information, transmitting downstream synchronizing signal staggers with the time slot of the emission cell broadcast information of base station, the time slot of transmitting downstream synchronizing signal in time; 3) corresponding to the time slot of wireless digital repeater towards the uplink synchronizing signals of the receiving terminal of the port of portable terminal emission, wireless digital repeater does not transmit or is in accepting state towards the port of base station.Terminal can receive broadcast singal, the downlink synchronous signal of broadcast singal, downlink synchronous signal and the wireless digital repeater emission of base station flexibly, can with base station and wireless digital repeater parallel synchronous, decision is access base station or access wireless digital repeater to terminal according to the quality of signals situation of its base station signal that receives and wireless digital repeater.
Be that example provides wireless digital repeater frame structure and wireless terminal access method with the application scenarios shown in (a) among Fig. 1 below.
Among Fig. 1 repeater shown in (a) by: the antenna of an antenna towards the base station, a terminaloriented, transmission channel, transmission channel, these the several essential parts of management control unit from the base station to terminal from terminal to the base station are formed.From terminal to signal of base station through the receive path of the antenna of terminaloriented, band pass filter, radio-frequency (RF) switch, terminaloriented, terminal to the baseband processing unit of base station direction, towards the base station transmission channel, radio-frequency (RF) switch, towards the antenna transmission of base station to the base station; From the base station to the signal of terminal through towards the antenna of base station, band pass filter, radio-frequency (RF) switch, the antenna transmission of transmission channel, radio-frequency (RF) switch, terminaloriented of baseband processing unit, terminaloriented towards the receive path of base station, base station to the terminal direction to terminal.
Under " breathing " mode of operation, two ports of fixed wireless digital repeater receive as a pair of nostril and emission simultaneously simultaneously, use this pattern can effectively reduce adjacent area interference, reduce the relaying time delay and improve efficiency of transmission;
In supporting the wireless digital repeater frame structure of " breathings " pattern, 1) wireless digital repeater comprises the time slot of the time slot of launching cell broadcast information, transmitting downstream synchronizing signal, the time slot of uplink synchronizing signals that receiving terminal is launched in the transmitting-receiving work schedule of the port of portable terminal; 2) in the part or all of time slot of base station reverse link traffic channel correspondence, wireless digital repeater transmits simultaneously towards the port of base station and the port of terminaloriented; 3) in the part or all of time slot of base station down Traffic Channel correspondence, wireless digital repeater is towards the port while received signal of the port and the terminaloriented of base station.
Further, the time slot of the time slot of wireless digital repeater emission cell broadcast information, transmitting downstream synchronizing signal staggers with the time slot of the emission cell broadcast information of base station, the time slot of transmitting downstream synchronizing signal in time.
Further, corresponding to the time slot of wireless digital repeater towards the uplink synchronizing signals of the receiving terminal of the port of portable terminal emission, wireless digital repeater does not transmit or is in accepting state towards the port of base station.Terminal can receive broadcast singal, the downlink synchronous signal of broadcast singal, downlink synchronous signal and the wireless digital repeater emission of base station flexibly, can with base station and wireless digital repeater parallel synchronous, decision is access base station or access wireless digital repeater to terminal according to the quality of signals situation of its base station signal that receives and wireless digital repeater.
The cut-in method of the portable terminal in the wireless communication system that adopts above-mentioned wireless digital repeater is as follows:
The first step, portable terminal both keep synchronously with the base station, also/or synchronous with the wireless digital repeater maintenance.Concrete grammar is: the downlink synchronous signal of mobile terminal to search base station, also search for simultaneously the downlink synchronous signal of wireless digital repeater emission, after searching out base station synchronization signal and/or wireless digital repeater downlink synchronous signal, just and base station and/or wireless digital repeater set up synchronized relation.
In second step, portable terminal had both received the broadcast singal of base station, also/or receive the broadcast singal of wireless digital repeater.Concrete grammar is: portable terminal is receiving broadcast signal in base station transmits cell broadcast singal time slot, also receiving broadcast signal in wireless digital repeat broadcast cell information time slot.
In the 3rd step, terminal decides access way according to the cell broadcast information of base station cell information that receives and/or wireless digital repeater emission.When base station and wireless digital repeater all allow to insert, according to the quality and the professional type decided access way of channel quality.If the channel quality of base station is better than wireless digital repeater, perhaps there is not the signal of wireless digital repeater, with regard to access base station, concrete grammar is that terminal is sent uplink synchronizing signals and inserted request signal to the base station in the time slot of base station frame structure regulation; If the channel quality of base station is not as wireless digital repeater, perhaps there is not signal of base station, just insert wireless digital repeater, concrete grammar is that terminal is sent uplink synchronizing signals and inserted request signal to repeater in the time slot of wireless digital relay frame structures regulation;
The arrangement method of the terminal traffic time slot that the present invention provides is: the uplink service time slot of the base station corresponding with the uplink synchronous time slot of wireless repeater or up access slot, as the TS2 in 202, as standby time slot, only when the up not enough use of other of base station, just use this time slot.Use this time slot method to be: the tdd communication systems the inside that is having wireless repeater to exist, classify terminal the time of advent according to terminal, being classified as a class less than the terminal of particular value to the distance of base station, the uplink synchronizing signals time slot is followed in reverse link traffic channel time slot back, and network is arranged in the reverse link traffic channel of part or all this Terminal Type in the uplink synchronous time slot or up access slot time slot corresponding with wireless repeater.Transmitting to the interference of UpPTS (R) time slot of repeater of terminal in can suppressing like this to communicate with the base station ensures the reliable access of terminal to repeater.
Describe according to the embodiment of the invention and wireless digital repeater frame structure TD-SCDMA system frame structure compatibility below with reference to Fig. 4.
Fig. 4 shows the frame structure 201 that the port of the wireless digital repeater terminaloriented of a kind of TD-SCDMA of being applicable to system uses.Also show the complex form 206 of the frame structure 207 of frame structure 204, repeater terminaloriented port of frame structure 205 that wireless digital repeater uses towards the port of base station, TD-SCDMA system and time slot TS0, DwPTS in the TD-SCDMA frame structure, GP, UpPTS among Fig. 4 simultaneously.Among Fig. 4 202 is the odd-numbered frame in the TD-SCDMA system wireless frame, the 203rd, and the even frame in the TD-SCDMA system wireless frame.
The arrangement to the business time-slot position of TS1～TS6 shown in Fig. 4 is a kind of example, and multiple arrangement is flexibly arranged in the reality.
The feature of the frame structure 201 that the port of the wireless digital relaying terminaloriented of a kind of TD-SCDMA of being applicable to system uses is: be the cycle with a TD-SCDMA radio frames, with the TD-SCDMA frame structure in time slot TS0, DwPTS, GP, the part of UpPTS correspondence keeps idle condition, with the TS0 (R) of the TS1/TS2 time slot corresponding interpolation incoming trunk special use of TD-SCDMA, DwPTS (R), GP (R), UpPTS (R), this has just guaranteed to meet between the terminal of existing TD-SCDMA standard and base station can proper communication, and support the terminal that relaying inserts for both meeting existing TD-SCDMA standard, both can be at time slot TS0, DwPTS, GP, the UpPTS access base station, also can be at time slot TS0 (R), DwPTS (R), GP (R), UpPTS (R) inserts repeater, and this has just guaranteed the compatibility of the introducing of repeater to existing system.
The UpPTS of repeater (R) is that a part that has taken the time slot TS2 in the odd-numbered frame of TD-SCDMA radio frames realizes, in real system, the emission of the TS2 time slot in the odd-numbered frame of the port for fear of wireless digital repeater towards the base station is to the interference towards UpPTS (R) time slot of terminal prot, influence the interference of repeater to the terminal uplink synchronizing signals, this time slot is used as the expansion time slot, and just wireless digital repeater does not transmit or receives only signal towards the TS2 time slot in the odd-numbered frame of the port of base station during UpPTS (R) time slot.
Be herein time slot TS0 (R), DwPTS (R), GP (R), UpPTS (R) with repeater to be placed in the odd-numbered frame time corresponding scope of TD-SCDMA radio frames be the explanation that example is carried out, another implementation method is that time slot TS0 (R), DwPTS (R), GP (R), the UpPTS (R) repeater also can be placed in the even frame time corresponding scope of TD-SCDMA radio frames.
Below with reference to Fig. 5 describe according to the embodiment of the invention with improve after the wireless digital repeater frame structure of TD-SCDMA system frame structure compatibility.
Fig. 5 shows a kind of frame structure 303 and 302 that is applicable to that the port to the wireless digital relaying terminaloriented of the adjusted TD-SCDMA radio frames 301 in UpPTS position uses disclosed by the invention.
To being characterized as of the adjusted TD-SCDMA radio frames 301 in UpPTS position: the UpPTS time slot has been put into the back of an ascending time slot, here be the back that is put into TS2, also can be put into other ascending time slot back to the UpPTS time slot, but, in order to reach effect preferably, the UpPTS time slot is put into the back of TS2.
Being characterized as of the frame structure 303 that the wireless digital relaying uses towards the port of base station: 1) use the wireless digital relaying towards the part of TS2 time slot time slot corresponding port and TD-SCDMA radio frames 301 (also being labeled as TS2) of base station UpPTS time slot as repeater; 2) and the repeater of this time slot correspondence be used for expansion towards the time slot in the radio frames of the port of base station and use,, do not transmit in the TPS time slot or be in the acknowledge(ment) signal state.
The feature of the frame structure 303 that the port of the wireless digital relaying terminaloriented of a kind of TD-SCDMA of being applicable to system uses is: with one the adjusted TD-SCDMA radio frames 301 in UpPTS position is the cycle, with the TD-SCDMA frame structure in time slot TS0, DwPTS, GP, the part of UpPTS correspondence keeps idle condition, with the TS0 (R) of the TS1/TS2 time slot corresponding interpolation incoming trunk special use of TD-SCDMA, DwPTS (R), GP (R), UpPTS (R), this has just guaranteed to meet between the terminal of existing TD-SCDMA standard and base station can proper communication, and support the terminal that relaying inserts for both meeting existing TD-SCDMA standard, both can be at time slot TS0, DwPTS, GP, the UpPTS access base station, also can be at time slot TS0 (R), DwPTS (R), GP (R), UpPTS (R) inserts repeater, and this has just guaranteed the compatibility of the introducing of repeater to existing system.
The feature of the frame structure 302 that the port of the wireless digital relaying terminaloriented of a kind of TD-SCDMA of being applicable to system uses is: with one the adjusted TD-SCDMA radio frames 301 in UpPTS position is the cycle, with the TD-SCDMA frame structure in time slot TS0, DwPTS, GP, (UpPTS) corresponding part keeps idle condition, with the TS0 (R) of the TS1/TS2 time slot corresponding interpolation incoming trunk special use of TD-SCDMA, DwPTS (R), GP (R) is inserting UpPTS (R) to the UpPTS position in the overlapping time slot of the UpPTS time slot in the adjusted TD-SCDMA radio frames 301 with one.This has just guaranteed to meet between the terminal of existing TD-SCDMA standard and base station can proper communication, and support the terminal that relaying inserts for both meeting existing TD-SCDMA standard, both can be at time slot TS0, DwPTS, GP, UpPTS access base station, also can insert repeater at time slot TS0 (R), DwPTS (R), GP (R), UpPTS (R), this has just guaranteed the compatibility of the introducing of repeater to existing system.
Be herein time slot TS0 (R), DwPTS (R), GP (R), UpPTS (R) with repeater to be placed in the odd-numbered frame time corresponding scope of the TD-SCDMA radio frames after the improvement be the explanation that example is carried out, another implementation method is that time slot TS0 (R), DwPTS (R), GP (R), the UpPTS (R) repeater also can be placed in the even frame time corresponding scope of the TD-SCDMA radio frames after the improvement.
The present invention reaches following effect: 1) frame structure and existing system forward compatibility, the introducing of wireless digital repeater do not influence the communication mode between existing terminal and base station; 2) frame structure has guaranteed that access signal between terminal and the wireless repeater is not subjected to the interference of adjacent base station transmit signals.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the cut-in method of the portable terminal of a tdd communication systems is characterized in that, the wireless digital repeater in the described tdd communication systems adopts following steps to carry out time slot allocation:
The time slot of emission cell broadcast information is set;
In the part or all of time slot of base station reverse link traffic channel correspondence, described wireless digital repeater is set to transmit simultaneously towards the port of described base station with towards the port of portable terminal;
In the part or all of time slot of described base station down Traffic Channel correspondence, described wireless digital repeater is set to received signal simultaneously towards the port of described base station with towards the port of described portable terminal,
Described cut-in method may further comprise the steps:
Described portable terminal and base station and described wireless digital repeater keep synchronously;
Described portable terminal receives the broadcast singal of described base station and the broadcast singal of described wireless digital repeater;
Described portable terminal decides access way according to the cell broadcast information of base station cell broadcast message that receives and/or wireless digital repeater emission, when described base station and wireless digital repeater all allow to insert, according to channel quality and professional type decided access way.
2. cut-in method according to claim 1, it is characterized in that, if the channel quality of described base station is better than described wireless digital repeater, the signal that does not perhaps have described wireless digital repeater, then described portable terminal inserts described base station, sends uplink synchronizing signals and inserts request signal to described base station in the time slot of described base station frame structure regulation.
3. cut-in method according to claim 1, it is characterized in that, if the channel quality of described base station is wireless digital repeater as described not, perhaps there is not described signal of base station, then described portable terminal inserts described wireless digital repeater, sends uplink synchronizing signals and inserts request signal to described wireless digital repeater in the time slot of described wireless digital repeater frame structure regulation.
4. according to each described cut-in method in the claim 1 to 3, it is characterized in that the ascending time slot of described base station that will be corresponding with the uplink pilot time slot of described wireless digital repeater is as standby time slot.
5. cut-in method according to claim 4, it is characterized in that, the uplink pilot time slot that makes described base station is immediately following in reverse link traffic channel time slot back, makes being arranged on less than the reverse link traffic channel of the described portable terminal of particular value in the uplink pilot time slot time slot corresponding with described wireless digital repeater to the distance of described base station of part or all.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200610140189XA CN101162984A (en) | 2006-10-12 | 2006-10-12 | Mobile terminal access method of TDD communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200610140189XA CN101162984A (en) | 2006-10-12 | 2006-10-12 | Mobile terminal access method of TDD communication system |
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| Publication Number | Publication Date |
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| CN101162984A true CN101162984A (en) | 2008-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA200610140189XA Withdrawn CN101162984A (en) | 2006-10-12 | 2006-10-12 | Mobile terminal access method of TDD communication system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010000093A1 (en) * | 2008-07-01 | 2010-01-07 | 上海贝尔阿尔卡特股份有限公司 | Method and apparatus for ranging in wireless relay network |
| CN101795481A (en) * | 2010-03-22 | 2010-08-04 | 普天信息技术研究院有限公司 | Method for accessing client to service cell in long term evolution advanced system |
| CN101826907A (en) * | 2009-03-02 | 2010-09-08 | 中兴通讯股份有限公司 | Multi-access mode notification method and transmitting device for wireless link information transmission |
| CN102119553A (en) * | 2008-08-08 | 2011-07-06 | 夏普株式会社 | Wireless communication system, control station device, and terminal device |
| CN109561396A (en) * | 2018-12-13 | 2019-04-02 | 浙江天则通信技术有限公司 | A kind of data transmission system for robot |
-
2006
- 2006-10-12 CN CNA200610140189XA patent/CN101162984A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010000093A1 (en) * | 2008-07-01 | 2010-01-07 | 上海贝尔阿尔卡特股份有限公司 | Method and apparatus for ranging in wireless relay network |
| CN102119553A (en) * | 2008-08-08 | 2011-07-06 | 夏普株式会社 | Wireless communication system, control station device, and terminal device |
| CN102119553B (en) * | 2008-08-08 | 2015-04-22 | 夏普株式会社 | Wireless communication system, control station device, and terminal device |
| CN101826907A (en) * | 2009-03-02 | 2010-09-08 | 中兴通讯股份有限公司 | Multi-access mode notification method and transmitting device for wireless link information transmission |
| CN101826907B (en) * | 2009-03-02 | 2014-03-19 | 中兴通讯股份有限公司南京分公司 | Multi-access mode notification method and transmitting device for wireless link information transmission |
| CN101795481A (en) * | 2010-03-22 | 2010-08-04 | 普天信息技术研究院有限公司 | Method for accessing client to service cell in long term evolution advanced system |
| CN109561396A (en) * | 2018-12-13 | 2019-04-02 | 浙江天则通信技术有限公司 | A kind of data transmission system for robot |
| CN109561396B (en) * | 2018-12-13 | 2021-03-02 | 浙江天则通信技术有限公司 | Data transmission system for robot |
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