CN101389050B - Information sending and receiving method using reference symbol configuration change in single frequency network - Google Patents

Information sending and receiving method using reference symbol configuration change in single frequency network Download PDF

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CN101389050B
CN101389050B CN2007100460255A CN200710046025A CN101389050B CN 101389050 B CN101389050 B CN 101389050B CN 2007100460255 A CN2007100460255 A CN 2007100460255A CN 200710046025 A CN200710046025 A CN 200710046025A CN 101389050 B CN101389050 B CN 101389050B
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reference symbol
time slot
sub
frequency network
network area
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CN101389050A (en
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师延山
吴涛
张治�
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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Abstract

The invention discloses a sending and receiving method for variable information configured by a reference mark in a single frequency network communication system. The method is simple and is easy to realize. The method adopts the technical proposal as follows: (1) a base station appoints time slots belonging to a same single frequency network area and configures the time slots belonging to the same single frequency network area as the adjacent time slots; (2) the base station sends mapping relation information of signal channels and time slots; (3) the base station sends time slot configuration information; (4) for the reference mark which is appointed or between front and back two adjacent time slot portions determined by the configuration information in the same single frequency network area, the base station transmits information to a terminal through sending PT of the back time slot and PW of the front time slot and changed various combinations; (5) for the reference mark which is not appointed or between front and back two adjacent time slot portions not determined by the configuration information in the same single frequency network area, the base station transmits the information to the terminal through changing the PW of the front time slot or changing the PT of the back time slot. The invention is applied to the mobile communication field.

Description

Utilize the information of reference symbol configuration variation to send and method of reseptance in the single frequency network
Technical field
The present invention relates to frame method of sending and receiving in the communication system, the base station that relates in particular to the variation of the use reference symbol configuration in a kind of communication system sends the method for information and the method that terminal receives information.
Background technology
In traditional broadcast system, analog television broadcast for example is in order to expand the coverage area, the adjacent transmission platform uses different frequency to avoid the phase mutual interference, same frequency must ability be multiplexing in addition at certain distance, Here it is multiple frequency network, MFN (Multi-Frequency Network, MFN) mode.Under this mode, one road signal need take several times frequency bandwidth, has consumed valuable frequency spectrum resource.
Along with being becoming tight frequency spectrum resource day and the development of signal processing technology, the networking mode of SFN becomes focus.So-called single frequency network (SFN) is meant that the same time of several transmitting stations launch same signal on same frequency, with the reliable covering of realization to certain service area.The largest benefit that single frequency network is brought is the raising of spectrum efficiency.Send one road signal in the coverage and only need a frequency, for the television broadcasting of the big bandwidth of need, this advantage is more outstanding.The diversity that a plurality of transmitting station synchronous workings are brought makes that also the reliability that receives is enhanced, and obtains better program coverage rate.In addition, by adjustment and optimization to transmit network (as the height of the quantity of transmitter, distribution, individual transmitter, transmitting power etc.), also can reduce total power consumption, alleviate interference, even change the distribution of overlay area as required easily and flexibly near other networks.
The proposition and the multi-carrier modulation of single frequency network interrelate, for example OFDM (Orthogonal Frequency Division Multiplexing, OFDM).(Long Term Evolution LTE) in the standard of being worked out, has introduced OFDM to the Long Term Evolution project of 3GPP normal structure, adopts orthogonal frequency division multiplexing multiple access (OFDMA) mode.When it works in TDD mode, a kind of frame structure wherein, basic identical with the frame structure of present TD-SCDMA system.
For cdma system, under the single frequency network pattern, come from the signal of different base station, can be moved terminal and think multipath signal, and then carry out diversity and handle.But to a certain extent, the CDMA single frequency network increases to the disposal ability of its receiver.A main change is, receiver want to tolerate more long delay and its power may with the suitable multipath signal of main footpath signal.Therefore, between each base station regularly synchronously, the data synchronization that sends, the receptivity of portable terminal is had a significant impact.
Fig. 1 shows a typical cell mobile communication systems.This system is by a plurality of sub-districts 100 1～100 ZConstitute, a base station (NodeB) 101 is wherein respectively arranged in each sub-district 1～101 Z, there is the user terminal (UE) 102 of some in the while in this sub-district service range 1～102 kFor example, to sub-district 100 1, each user terminal 102 1～102 kBy with affiliated Serving cell in base station 101 1Keep to connect, finish and other communication equipment between communication function.The channel that communicates between user terminal and the base station is called as up channel from the channel of user terminal to base station direction, and the channel from the base station to the user terminal direction is called as down channel.Base station 101 1～101 ZControlled and managed by radio network controller (RNC) 103 again.By base station 101 1～101 Z, radio network controller 103 and other network element devices together, just constituted land radio access web (UTRAN) 110.
TD-SCDMA is a part of 3G standard.There are a plurality of carrier resources a sub-district of present TD-SCDMA system.
Fig. 2 shows the frame structure of TD-SCDMA system.This structure is according to providing in low spreading rate time division duplex (LCR-TDD) pattern (1.28Mcps) among 3G collaborative project (3GPP) the standard TS25.221 (Release4).The spreading rate of TD-SCDMA system is 1.28Mcps, and the length of each radio frames (Radio Frame) 200 is 10ms, and is divided into two subframes 201 that structure is identical 0, 201 1, the length of each subframe is 5ms, i.e. 6400 chips.Wherein, (for example subframe 201 for the subframe in each TD-SCDMA system 0) (TS0～TS6) 202 can be divided into 7 time slots again 0～202 6, two pilot time slots (descending pilot frequency time slot (DwPTS) 203 and uplink pilot time slot (UpPTS) 205) and protection (Guard) 204 at interval.Further, the TS0 time slot 202 0Be used to bearing system broadcast channel and other possible downlink traffic channel; And TS1～TS6 time slot 202 1～202 6Then be used to carry the uplink and downlink Traffic Channel.It is synchronous that uplink pilot time slot (UpPTS) 205 and descending pilot frequency time slot (DwPTS) 203 are used to set up initial uplink and downlink respectively.TS0～TS6 time slot 202 0～202 6Length is 0.675ms or 864 chips, wherein comprise data segment (Data Part 1) 208 and (Data Part 2) 210 that two segment lengths are 352 chips, and a middle segment length is the reference symbol of 144 chips--in lead sign indicating number (Midamble) sequence 209.Middle guiding code sequence 209 is significant in the TD-SCDMA system, comprise cell ID, channel estimating and synchronously modules such as (comprising Frequency Synchronization) all to use it.The protection that descending pilot frequency time slot (DwPTS) 203 comprises 32 chips at interval 211 and one long be descending synchronous code (SYNC-DL) code word 206 of 64 chips, its effect is cell ID and sets up initial synchronisation; And uplink pilot time slot (UpPTS) comprise one long be uplink synchronous code (SYNC-UL) code word 207 of 128 chips, subscriber terminal equipment utilizes it to carry out relevant up access procedure.At TS1～TS6 time slot 202 1～202 6Between a transfer point (Switching Point) 212 is arranged.When the up-downgoing ratio was 3: 3, transfer point (Switching Point) 212 was positioned at TS3～TS4 time slot 202 3～202 4Between, at this moment, the employed up Dedicated Traffic Channel of user terminal is dispensed on TS1～TS3 time slot 202 1～202 3In, the descending TS4～TS6 time slot 202 that then is distributed in usually 4～202 6In.
Broadcast type multimedia services such as mobile TV belong to downlink broadcast class business.In order to provide more multimedia service on a carrier wave, a kind of complete descending special carrier technology is suggested, and promptly all time slots on carrier wave are descending time slot.Special carrier among the TD-SCDMA can be formed single frequency network usually, i.e. the SFN special carrier.Because use the SFN technology, identical signal sends simultaneously in more wide different place, causes the time delay between multipath signal bigger.In order to adapt to bigger time delay, a kind of new frame structure is suggested.
As shown in Figure 3, be TD-SCDMA special carrier frame structure schematic diagram.In this structure, two pilot time slots among the TD-SCDMA (descending pilot frequency time slot (DwPTS) 203 and uplink pilot time slot (UpPTS) 205) and protection interval (Guard) 204 are merged into the crack in short-term 302 that length is 352 chips 1Correspondingly, among the TD-SCDMA other time slots as long time slot (302 0, 302 2～302 7) be redesigned.No matter still crack in short-term of long time slot all is made of leading reference symbol (PreAmble) 309 and data division (Data Part) 308; The data division (308 of long time slot wherein 0, 308 2～308 7) length is 752 chips, the crack 302 in short-term 1Data division 308 1Length is 240 chips.Each leading reference symbol (PreAmble) 309 is made of 313 and reference symbol basic codes of a Cyclic Prefix (CP) (PA Code) 314, and wherein Cyclic Prefix (CP) 313 is identical with the afterbody of reference symbol basic code (PA Code) 314.Cyclic Prefix (CP) 313 is usually designed to 32 or 48 chips, so that adapt to the big situation of SFN network multi-path time delay.When Cyclic Prefix (CP) 313 was usually designed to 32 chips, leading reference symbol (PreAmble) 309 can be shorter when being designed to 48 chips, and correspondingly, the data division 308 in the time slot can take more chips.
In addition, by with leading reference symbol (PreAmble) 309 separated into two parts, the technical scheme that is put into time slot 302 two ends also is suggested, and changing the distribution of time slot internal reference symbol, and then changes performance for estimating channel in the time slot.
The basic sequence of reference symbol (PA Code) 314 is known at receiving terminal.User terminal compares the reference symbol that receives and known content, detects the state of reference symbol, and then realizes channel estimating.If reference symbol is very near with the data division distance that will receive, then can be similar to the channel status of deriving data division with channel estimating to reference symbol.
As shown in Figure 4, be a kind of single frequency network networking mode schematic diagram.Three single frequency network (SFN) zone is arranged, SFNc400, SFNa401 and SFNb402.Wherein, SFNc400 is big single-frequency network area, for example entire city; SFNa401 and SFNb402 are by two little single-frequency network areas that SFNc400 comprised, for example Dongcheng District in city and Xicheng District.Because all base stations in the SFN zone are broadcasted identical content simultaneously, so SFNc400 and two contents that little single-frequency network area is broadcasted are to lean on time and frequency separation, promptly the former uses different time slots or frequency emissioning signal with the latter; Then can lean on the region, space to cut apart between SFNa401 and the SFNb402, and then use identical time slot and frequency to broadcast.
Suppose that SFNc400 takies time slot TS2 302 2, SFNa401 takies time slot TS3 302 3, easily see, outside the SFNa401 zone, receive TS2 302 2UE102, can't receive time slot TS3 302 3The front end reference symbol.At this moment, UE can only lean on the channel parameter of the leading reference symbol data estimator part of institute's receiving slot self, and can't lean on the channel estimating of two adjacent reference symbols of data part both sides to carry out interpolation and carry out channel estimating, this will reach the receptivity that reduces data division.
Fig. 5 shows a kind of technology schematic diagram that above-mentioned UE can't receive the leading reference symbol problem of the adjacent time-slots that belongs to different single-frequency network areas that solves.Each reference symbol (PreAmble) 309 is superimposed by two sub-reference symbol sequence and forms, and is respectively the first sub-reference symbol PT501 and the second sub-reference symbol PW502.Its neutron reference symbol PT501 belongs to this time slot, and sub-reference symbol PW502 belongs to previous adjacent time-slots.For example, for time slot TSi 302 i, its leading reference symbol PreAmble 309 iIn, sub-reference symbol PT is the PT (i) 501 that belongs to this time slot i, sub-reference symbol PW is for belonging to front time slot TS (i-1) 302 I-1PW (i-1) 502 I-1Sub-reference symbol PT or PW belong to certain time slot, mean that the data division of PT and PW and this time slot is launched together.For example, if time slot TSi 302 has been launched in a SFN zone iData division 308 i, the inevitable sub-reference symbol PT (i) 501 that also launch this time slot in base station that so should the zone iWith this time slot rear adjacent time slot TS (i+1) 302 I+1Sub-reference symbol PW (i) 502 i, and no matter whether this adjacent thereafter time slot belongs to same SFN zone.
Like this, for the data division of a time slot, no matter thereafter whether adjacent time-slots belongs to same SFN zone, can both receive this time slot and arrive sub-reference symbol PW to sub-reference symbol PT and back time slot, carries out channel estimating.
309 to two sub-reference symbols of reference symbol (PreAmble) can be that two differences arrive the PACode sequence, also can be to be generated to cyclic shift by different length by same PA Code sequence; A kind of method in back is more commonly used.For example, for a length be 64 chips to PA Code, can obtain another PA Code to its cyclic shift of carrying out 32 chips; Add the cyclic prefix CP of 32 chips more respectively two PA Code sequence fronts, promptly back 32 chips with two PA Code sequences are identical respectively for CP; Two sub-reference symbol PT and PW will have been constituted like this.UTRAN when emission, the power of reference symbol PT and PW is superimposed launches.
When Fig. 6 shows time slot and its preceding adjacent time-slots and belongs to identical SFN zone, this time slot reference symbol is carried out the schematic diagram of channel estimation results.Because the emission of a plurality of adjacent base stations is identical to wireless signal, these wireless signals also can pass through approach arrival UE such as direct projection, reflection, refraction, so UE receives is one group of multipath signal.And by the estimation to two sub-reference symbols obtain these signals each the footpath energy, and each the footpath between the delay offset relationship.See Fig. 6,, obtain three barss footpath 604,605 and 606 by the estimation of antithetical phrase reference symbol PT; By PW is obtained 614,615 and 616 3 barss directly to estimating.Owing to disturb, also can detect noise signal 607,608 by PT respectively simultaneously, detect noise path 617,618 by PW.Since sub-reference symbol PW be by PT through cyclic shift, for example 32 chips displacement and forming, so the signal estimated of PW is equivalent to the PT estimated signals and has been offset 32 chips backward.Like this, be equivalent to have two skew windows, promptly PT skew window 601 and PW are offset window 602, and the estimated result in window belongs to PT and PW respectively.Because PT belongs to identical SFN zone with PW, and the shifted relationship of PT and PW, in fact, signal footpath 604 and 614,605 and 615,606 and 616 belongs to same bars channel estimation results directly respectively.
UE judge estimated to each signal when directly being noise or signal, detect by a power decision threshold 603 usually, greater than this thresholding be judged as the signal footpath, otherwise be noise.For example, 604 among Fig. 6,606,614 and 616 signals footpath can be judged as the useful signal footpath, and 605 and 615 signals footpath is mistaken for noise because power is low excessively.
When Fig. 7 shows time slot and its preceding adjacent time-slots and belongs to different SFN zone, this time slot reference symbol is carried out the schematic diagram of channel estimation results.At this moment, because PT adheres to different SFN zone separately with PW, two SFN zones are by incomplete two groups of base station transmit signals, the channel estimation results of PT and PW can occur than big-difference like this, by the detected signal of PW footpath 714,715 and 716, with detected 604,605,606 by PT, side-play amount and can discharge amplitude on all possible different.Like this, UE footpath can be offset channel estimation results in window 601 and the PW skew window 602 by PT, estimates the channel parameter of this time slot and preceding adjacent time-slots respectively, although these two time slots belong to different SFN zones.
From Fig. 6 as seen, though signal footpath 605 and 615 belongs to the different estimated results in same signal footpath,, and judged into by accident noise because its energy is lower than decision threshold.This is unfavorable to receptivity.
Fig. 8 shows among Fig. 6, the channel estimation results result schematic diagram that is superimposed together of two skew windows.Because what two skews of Fig. 6 window was estimated is same group of signal, therefore can be superimposed together, obtain total channel estimating.Can find that estimated result 604,605,606 and 614,615,616 becomes estimated result 804,805 and 806 after superposeing respectively, the energy of such 805 signals will be higher than decision threshold 803, and then will be useful signal by the UE detection.Owing to be superimposed together, the energy of useful signal estimated result improves, and therefore, is equivalent to thresholding 603, can suitably improve the value of noise gate 803, so that filter out noise more accurately in addition.
If UE can confirm institute's receiving slot and whether belong to identical SFN zone with its forward and backward time slot, whether the PT that just can judge institute's receiving slot comes from identical signal emission with PW, and then whether can conclude can with belong to respectively PT and and the channel estimation results of PW be superimposed together, as total to channel estimating.As seen from Figure 8, after being superimposed together, channel estimating is more accurate.
Yet prior art does not offer UE whether adjacent time-slots is belonged to identical single-frequency network area to effective way.This will make the channel estimating performance of UE be improved.Therefore, for the mobile TV class broadcasting service on the special carrier, present frame structure that proposes of TD-SCDMA system and correlation technique thereof also need to be optimized and improve.
Summary of the invention
The objective of the invention is to address the above problem, the base station information sending method of the variation that utilizes reference symbol configuration in a kind of single frequency network communication system be provided, adapt to mono-frequency network system, method simple, be easy to realize.
Another object of the present invention is to provide the end message method of reseptance of the variation that utilizes reference symbol configuration in a kind of single frequency network communication system, adapt to mono-frequency network system, method simple, be easy to realize.
Another object of the present invention is to provide the guest's who utilizes reference symbol configuration in a kind of single frequency network communication system words information transmitting/receiving method, adapt to mono-frequency network system, method simple, be easy to realize.
Technical scheme of the present invention is: the present invention has disclosed the base station information sending method of the variation that utilizes the reference symbol configuration in a kind of single frequency network communication system, and this method comprises:
(1) base station belongs to the time slot of identical single-frequency network area according to communication protocol agreement configuration, and the time slot configuration that will belong to identical single-frequency network area is an adjacent time-slots;
(2) base station is to the mapping relations information of terminal transmitting channel and time slot;
(3) base station is to the configuration information of terminal sending time slots;
(4) to arrange or this configuration information in clearly belong to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part, the base station is transmitted information by sending the first sub-reference symbol and the second sub-reference symbol of preceding time slot and the various combinations of change of back time slot to terminal;
(5) to clearly not belonging to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part in agreement or this configuration information, the base station is transmitted information by second sub-reference symbol of time slot before changing or the first sub-reference symbol of change back time slot to terminal;
Wherein in step (4) and (5), the front and back two adjacent timeslot numbers that belong to same single-frequency network area are the twices of the power of the single first sub-reference symbol or the second sub-reference symbol according to the transmitting power of the reference symbol between part.
Utilize the base station information sending method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, the combination in any of the following configuration mode of use disposes the time slot in the frame in the step (1):
With the short-and-medium time slot of a frame with its before adjacent long time slot configuration become to belong to identical single-frequency network area;
The short-and-medium time slot of one frame is become to belong to identical single-frequency network area with adjacent long time slot configuration thereafter;
Latter two time slot configuration in one frame is become to belong to identical single-frequency network area;
All time slot configuration in one frame are become to belong at most two single-frequency network areas.
Utilize the base station information sending method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, this configuration information in the step (3) comprises whether each time slot that belongs within the frame structure belongs to identical single-frequency network area and each time slot employed first sub-reference symbol and the second sub-reference symbol.
Utilize the base station information sending method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, the combination in the step (4) comprises: reference symbol only comprise before time slot the second sub-reference symbol, only comprise the back time slot the first sub-reference symbol or comprise simultaneously before time slot the second sub-reference symbol and the back time slot the first sub-reference symbol.
Utilize the base station information sending method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, the information to the terminal transmission in the step (4) comprises:
Whether these former and later two adjacent time-slots belong to identical single-frequency network area; Perhaps,
Whether distinct between frame before and after a certain time slot place frame and its: the frame at this time slot place, first frame or last frame in the Transmission Time Interval of forming by multiframe; Perhaps,
Whether have the difference of time slot content before and after a certain time slot place frame and its between the frame: the content of this time slot is one and is specifically designed to and offers terminal and carry out synchronously, measure in this time slot place frame, or this time slot content is the configuration information of the single-frequency network area different with this time slot in this time slot place frame.
Utilize the base station information sending method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, step (4) is transmitted information to terminal and is further comprised:
If the reference symbol between crack and its preceding adjacent time-slots only comprises the second sub-reference symbol in short-term, then latter two long time slot of the former frame of this frame belongs to identical single-frequency network area, and this frame first time slot belongs to different single-frequency network areas with the last time slot of its former frame;
If the reference symbol between crack and its preceding adjacent time-slots only comprises the first sub-reference symbol in short-term, then all time slots of this frame belong to identical single-frequency network area;
If the reference symbol between crack and its preceding adjacent time-slots comprises the first sub-reference symbol and the second sub-reference symbol simultaneously in short-term, then this frame first time slot belongs to different single-frequency network areas with the last time slot of its former frame, and the crack in short-term of this frame belongs to different single-frequency network areas with adjacent thereafter long time slot.
Utilize the base station information sending method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, the change described in the step (5) to the first sub-reference symbol of preceding time slot and the second sub-reference symbol comprise following one of them: this second sub-reference symbol is set to equate with this first sub-reference symbol; This first sub-reference symbol is set to equate with this second sub-reference symbol; This first sub-reference symbol or this second sub-reference symbol are set to the known sub-reference symbol of other-end.
Utilize the base station information sending method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, the information to the terminal transmission in the step (5) comprises whether adjacent time-slots belongs to identical single-frequency network area.
Corresponding, the present invention has also disclosed the end message method of reseptance of the variation that utilizes the reference symbol configuration in a kind of single frequency network communication system, and this method of reseptance comprises:
(1) terminal receives the channel of base station transmission and the mapping relations information of time slot;
(2) terminal receives the configuration information of the time slot of base station transmission;
(3) to arrange or this configuration information in clearly belong to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part, the second sub-reference symbol of time slot and the first sub-reference symbol of back time slot and the various combinations of change thereof received the information that transmit the base station before terminal detected;
(4) to clearly not belonging to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part in agreement or this configuration information, whether terminal changes by second sub-reference symbol of time slot before detecting or the first sub-reference symbol of back time slot, receives the information that transmit the base station;
(5) the first sub-reference symbol that occurred by the information that changes the first sub-reference symbol and the second sub-reference symbol and transmit and contrast institute former and later two reference symbols of receiving slot data division according to the configuration information of the mapping relations information of this channel and time slot, this time slot, base station of terminal and the combination and the variation thereof of the second sub-reference symbol judge whether this time slot and its front and back time slot belong to same single-frequency network area;
(6) to judging the front and back two adjacent timeslot numbers that the belong to same single-frequency network area transmitting power according to the reference symbol between part, terminal thinks that all the transmitting power of this reference symbol is the twice of the power of the single first sub-reference symbol or the second sub-reference symbol;
(7) to judging the channel estimating that the front and back two adjacent timeslot numbers that belong to same single-frequency network area are done according to the reference symbol between part, terminal all is considered as those channel estimating the estimated result of same channel;
(8) to judging all channel estimation results that belong to same channel, terminal obtains total channel estimation results with its accumulative total;
(9) to judging the channel estimating that the front and back two adjacent timeslot numbers that do not belong to same single-frequency network area are done according to the reference symbol between part, the channel estimating of time slot before terminal is regarded the channel estimating of the second sub-reference symbol correspondence as, the channel estimating of the channel estimating of the first sub-reference symbol correspondence being regarded as the back time slot;
(10) terminal is according to the channel estimation results of each time slot reference symbol, the channel estimating parameter of calculated data part, and this data division carried out demodulation.
Utilize the end message method of reseptance of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, step (5) comprising: terminal detects ANOMALOUS VARIATIONS from two adjacent reference symbols of the front and back of a received time slot data division, those ANOMALOUS VARIATIONS are by base station and terminal agreement, and terminal judges according to those ANOMALOUS VARIATIONS whether this time slot and front and back time slot belong to same single-frequency network area.
Utilize the end message method of reseptance of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, step (5) also comprises: if a plurality of adjacent time-slots is mapped on the same channel, judge that then those adjacent time-slots belong to same single-frequency network area.
Utilize the end message method of reseptance of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, step (5) also comprises: whether the adjacent time-slots of launching according to the base station belongs to identical single-frequency network area is judged whether those adjacent time-slots belong to same single-frequency network area.
The present invention has disclosed the information transmitting/receiving method of the variation that utilizes the reference symbol configuration in a kind of single frequency network communication system in addition, and this sending and receiving methods comprises:
The base station process of transmitting:
(1) base station belongs to the time slot of identical single-frequency network area according to communication protocol agreement configuration, and the time slot configuration that will belong to identical single-frequency network area is an adjacent time-slots;
(2) base station is to the mapping relations information of terminal transmitting channel and time slot;
(3) base station is to the configuration information of terminal sending time slots;
(4) to arrange or this configuration information in clearly belong to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part, the base station is transmitted information by sending the first sub-reference symbol and the second sub-reference symbol of preceding time slot and the various combinations of change of back time slot to terminal;
(5) to clearly not belonging to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part in agreement or this configuration information, the base station is transmitted information by second sub-reference symbol of time slot before changing or the first sub-reference symbol of change back time slot to terminal;
Wherein in step (4) and (5), the front and back two adjacent timeslot numbers that belong to same single-frequency network area are the twices of the power of the single first sub-reference symbol or the second sub-reference symbol according to the transmitting power of the reference symbol between part
The terminal receiving course:
(a) terminal receives the channel of base station transmission and the mapping relations information of time slot;
(b) terminal receives the configuration information of the time slot of base station transmission;
(c) to arrange or this configuration information in clearly belong to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part, the second sub-reference symbol of time slot and the first sub-reference symbol of back time slot and the various combinations of change thereof received the information that transmit the base station before terminal detected;
(d) to clearly not belonging to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part in agreement or this configuration information, whether terminal changes by second sub-reference symbol of time slot before detecting or the first sub-reference symbol of back time slot, receives the information that transmit the base station;
(e) the first sub-reference symbol that occurred by the information that changes the first sub-reference symbol and the second sub-reference symbol and transmit and contrast institute former and later two reference symbols of receiving slot data division according to the configuration information of the mapping relations information of this channel and time slot, this time slot, base station of terminal and the combination and the variation thereof of the second sub-reference symbol judge whether this time slot and its front and back time slot belong to same single-frequency network area;
(f) to judging the front and back two adjacent timeslot numbers that the belong to same single-frequency network area transmitting power according to the reference symbol between part, terminal thinks that all the transmitting power of this reference symbol is the twice of the power of the single first sub-reference symbol or the second sub-reference symbol;
(g) to judging the channel estimating that the front and back two adjacent timeslot numbers that belong to same single-frequency network area are done according to the reference symbol between part, terminal all is considered as those channel estimating the estimated result of same channel;
(h) to judging all channel estimation results that belong to same channel, terminal obtains total channel estimation results with its accumulative total;
(i) to judging the channel estimating that the front and back two adjacent timeslot numbers that do not belong to same single-frequency network area are done according to the reference symbol between part, the channel estimating of time slot before terminal is regarded the channel estimating of the second sub-reference symbol correspondence as, the channel estimating of the channel estimating of the first sub-reference symbol correspondence being regarded as the back time slot;
(j) terminal is according to the channel estimation results of each time slot reference symbol, the channel of calculated data part
Estimated parameter, and this data division carried out demodulation.
Utilize the information transmitting/receiving method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, the combination in any of the following configuration mode of the step of this base station process of transmitting (1) use disposes the time slot in the frame:
With the short-and-medium time slot of a frame with its before adjacent long time slot configuration become to belong to identical single-frequency network area;
The short-and-medium time slot of one frame is become to belong to identical single-frequency network area with adjacent long time slot configuration thereafter;
Latter two time slot configuration in one frame is become to belong to identical single-frequency network area;
All time slot configuration in one frame are become to belong at most two single-frequency network areas.
Utilize the information transmitting/receiving method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, this configuration information in the step of this base station process of transmitting (3) comprises whether each time slot that belongs within the frame structure belongs to identical single-frequency network area and each time slot employed first sub-reference symbol and the second sub-reference symbol.
Utilize the information transmitting/receiving method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, the combination in the step (4) in this base station process of transmitting comprises: reference symbol only comprise before time slot the second sub-reference symbol, only comprise the back time slot the first sub-reference symbol or comprise simultaneously before time slot the second sub-reference symbol and the back time slot the first sub-reference symbol.
Utilize the information transmitting/receiving method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, the step (4) in this base station process of transmitting comprises to the information of terminal transmission:
Whether these former and later two adjacent time-slots belong to identical single-frequency network area; Perhaps,
Whether distinct between frame before and after a certain time slot place frame and its: the frame at this time slot place, first frame or last frame in the Transmission Time Interval of forming by multiframe; Perhaps,
Whether have the difference of time slot content before and after a certain time slot place frame and its between the frame: the content of this time slot is one and is specifically designed to and offers terminal and carry out synchronously, measure in this time slot place frame, or this time slot content is the configuration information of the single-frequency network area different with this time slot in this time slot place frame.
Utilize the information transmitting/receiving method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, the step (4) in this base station process of transmitting is transmitted information to terminal and is further comprised:
If the reference symbol between crack and its preceding adjacent time-slots only comprises the second sub-reference symbol in short-term, then latter two long time slot of the former frame of this frame belongs to identical single-frequency network area, and this frame first time slot belongs to different single-frequency network areas with the last time slot of its former frame;
If the reference symbol between crack and its preceding adjacent time-slots only comprises the first sub-reference symbol in short-term, then all time slots of this frame belong to identical single-frequency network area;
If the reference symbol between crack and its preceding adjacent time-slots comprises the first sub-reference symbol and the second sub-reference symbol simultaneously in short-term, then this frame first time slot belongs to different single-frequency network areas with the last time slot of its former frame, and the crack in short-term of this frame belongs to different single-frequency network areas with adjacent thereafter long time slot.
Utilize the information transmitting/receiving method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, the change described in the step of this base station process of transmitting (e) to the first sub-reference symbol of preceding time slot and the second sub-reference symbol comprise following one of them: this second sub-reference symbol is set to equate with this first sub-reference symbol; This first sub-reference symbol is set to equate with this second sub-reference symbol; This first sub-reference symbol or this second sub-reference symbol are set to the known sub-reference symbol of other-end.
Utilize the information transmitting/receiving method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, the information to the terminal transmission in the step of this base station process of transmitting (e) comprises whether adjacent time-slots belongs to identical single-frequency network area.
Utilize the information transmitting/receiving method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, the step of this terminal receiving course (e) comprising: terminal detects ANOMALOUS VARIATIONS from two adjacent reference symbols of the front and back of a received time slot data division, those ANOMALOUS VARIATIONS are by base station and terminal agreement, and terminal judges according to those ANOMALOUS VARIATIONS whether this time slot and front and back time slot belong to same single-frequency network area.
Utilize the information transmitting/receiving method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, the step of this terminal receiving course (e) also comprises: if a plurality of adjacent time-slots is mapped on the same channel, judge that then those adjacent time-slots belong to same single-frequency network area.
Utilize the information transmitting/receiving method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, the step of this terminal receiving course (e) also comprises: whether the adjacent time-slots of launching according to the base station belongs to identical single-frequency network area is judged whether those adjacent time-slots belong to same single-frequency network area.
Utilize the information transmitting/receiving method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, being configured to each time slot reference symbol in this base station process of transmitting:
The preceding time slot configuration of the short-and-medium time slot of one frame and its is become to belong to identical single-frequency network area;
The time slot configuration that belongs to identical single-frequency network area in one frame is become adjacent;
To belong to first time slot in first time slot configuration framing of first single-frequency network area;
Crack is in short-term become to belong to identical single-frequency network area with adjacent thereafter long time slot configuration, perhaps with in the frame latter two time slot configuration become to belong to identical single-frequency network area;
For crack reference symbol in short-term,, represent then in the frame that latter two time slot belongs to identical single-frequency network area if only comprise the second sub-reference symbol; If only comprise the first sub-reference symbol, represent that then all time slots belong to identical single-frequency network area in the frame; If comprise the first sub-reference symbol and the second sub-reference symbol simultaneously, represent that then first time slot of frame belongs to different single-frequency network areas with the last time slot of its former frame, and the crack in short-term of this frame belongs to different single-frequency network areas with adjacent thereafter long time slot;
If all time slots all belong to identical single-frequency network area, then the reference symbol of all time slots all only comprises the first sub-reference symbol;
If two different single-frequency network areas of all time slot data, one time slot belongs to different single-frequency network areas with its preceding time slot, then all before this time slot are not arranged and the reference symbol of the time slot that disposes all only comprises the second self-reference symbol, and all after this time slot are not arranged and the reference symbol of the time slot that disposes all only comprises the first sub-reference symbol.
Utilize the information transmitting/receiving method of the variation of reference symbol configuration in the above-mentioned single frequency network communication system, wherein, in the step of terminal receiving course (e) be by the judgment mode that detects ANOMALOUS VARIATIONS:
In two adjacent reference symbols of the front and back of certain received time slot data division of terminal, (1) if there is the first sub-reference symbol before detecting in the reference symbol the second sub-reference symbol is not arranged, do not have the first sub-reference symbol in the back reference symbol the second sub-reference symbol is arranged, judge that then the affiliated time slot of this data division and its front and back time slot belong to same single-frequency network area; (2) if there is the first sub-reference symbol before detecting in the reference symbol the second sub-reference symbol is not arranged, there is the first sub-reference symbol that the second sub-reference symbol is arranged in the back reference symbol, time slot time slot preceding with it belongs to same single-frequency network area under then judging this data division, and preliminary judgement belongs to different single-frequency network areas with subsequent time slot; (3) if having the first sub-reference symbol that the second sub-reference symbol is arranged in the reference symbol before detecting, there is the first sub-reference symbol that the second sub-reference symbol is arranged in the back reference symbol, judges tentatively that then the affiliated time slot of this data division belongs to different single-frequency network areas with its front and back time slot; (4) if having the first sub-reference symbol that the second sub-reference symbol is arranged in the reference symbol before detecting, there is the first sub-reference symbol not have the second sub-reference symbol in the back reference symbol, judge that then affiliated time slot of this data division and subsequent time slot belong to same single-frequency network area, preliminary judgement belongs to different single-frequency network areas with its preceding time slot; (5) if having the first sub-reference symbol not have the second sub-reference symbol in the reference symbol before detecting, there is the first sub-reference symbol not have the second sub-reference symbol in the back reference symbol, judges that then the affiliated time slot of this data division and its front and back time slot belong to same single-frequency network area.
The present invention contrasts prior art following beneficial effect: the present invention is by the improvement to reference symbol configuration in the frame structure, and the base station utilizes this improvement to transmit information to terminal, and content is whether adjacent time-slots belongs to identical single-frequency network area.The base station can merge the channel estimating in two skew windows easily, and then improve channel estimating performance after receiving this information.Of the present invention by information method of sending and receiving to reference symbol configuration in the frame structure, the frame structure of the single frequency network networking that is suitable for broadcasting services such as mobile TV is provided in communication system, corresponding method of reseptance is provided.Method of the present invention is simple and reliable, be easy to realize, improved the reliability of channel estimating, and then improved receiver performance.
Description of drawings
Fig. 1 is the rough schematic of typical cell mobile communication systems.
Fig. 2 is the schematic diagram of existing TD-SCDMA frame structure.
Fig. 3 is the frame structure schematic diagram of the existing TD-SCDMA of being used for special carrier.
Fig. 4 is the schematic diagram of existing single frequency network networking mode.
Fig. 5 solves the schematic diagram that UE can't receive the leading reference symbol problem of the adjacent time-slots that belongs to different single-frequency network areas in the prior art.
Fig. 6 is when time slot belongs to identical single-frequency network area with its preceding adjacent time-slots in the prior art, this time slot reference symbol is carried out the schematic diagram of channel estimation results.
Fig. 7 is when time slot belongs to different single-frequency network area with its preceding adjacent time-slots in the prior art, this time slot reference symbol is carried out the schematic diagram of channel estimation results.
Fig. 8 is the result schematic diagram that in the prior art channel estimation results of two of Fig. 6 correspondence skew windows is superimposed together.
Fig. 9 is that base station configuration of the present invention belongs to each time slot of single-frequency network area and transmits the method schematic diagram of information to UE.
Figure 10 is that base station configuration of the present invention belongs to each time slot of single-frequency network area and transmits the method flow diagram of information to UE.
Figure 11 information that to be UE of the present invention send according to the base station with the detection window of reference symbol is judged whether adjacent time-slots belongs to the method flow diagram of identical single-frequency network area.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Embodiments of the invention are base station information sending method and the end message method of reseptance that example is come the configuration of descriptor frame structure reference symbol and utilized the variation of this configuration with the TD-SCDMA dedicated system all.Those skilled in the art as can be known, the TD-SCDMA here only is an example, receiving/transmission method of the present invention extends to any communication system.
Figure 10 shows and utilizes the reference symbol configuration variation to carry out the method that information sends at the base station end in the single frequency network communication system.Seeing also Figure 10, is the detailed description to each step in the method flow below.
Step S10: the base station belongs to the time slot of identical single-frequency network area according to communication protocol agreement configuration, and the time slot configuration that will belong to identical single-frequency network area is an adjacent time-slots.
In the present embodiment, the combination in any of using following configuration mode disposes time slot in the frame as agreement: with the crack in short-term in the frame with its before adjacent long time slot configuration one-tenth belong to identical single-frequency network area; Crack in short-term in one frame is become to belong to identical single-frequency network area with adjacent long time slot configuration thereafter; Latter two time slot configuration in one frame is become to belong to identical single-frequency network area; All time slot configuration in one frame are become to belong at most two single-frequency network areas.
Step S11: the base station is to the mapping relations information of terminal transmitting channel and time slot.
Step S12: the base station is to the configuration information of terminal sending time slots.The configuration information of this time slot comprises whether each time slot that belongs within the frame structure belongs to identical single-frequency network area and each time slot employed first sub-reference symbol (PT) and the second sub-reference symbol (PW).
Step S13: to arrange or this configuration information in clearly belong to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part, first sub-reference symbol (PT) and second sub-reference symbol (PW) of preceding time slot and the various combinations that change of base station by sending the back time slot are transmitted information to terminal.The front and back two adjacent timeslot numbers that belong to same single-frequency network area are the twices of the power of the single first sub-reference symbol or the second sub-reference symbol according to the transmitting power of the reference symbol between part.
Various combinations described here comprise: the second sub-reference symbol (PW) of time slot before reference symbol (PreAmble) only comprises, perhaps reference symbol only comprises the first sub-reference symbol (PT) of back time slot, the first sub-reference symbol (PT) of second sub-reference symbol (PW) of time slot and back time slot before perhaps reference symbol comprises simultaneously.
Information to the terminal transmission comprises: whether these former and later two adjacent time-slots belong to identical single-frequency network area, and perhaps whether certain time slot is a time slot that transmits special data.Specifically, whether certain time slot is that the time slot of a Data transmission comprises: a certain time slot place frame and whether distinct between frame before and after it: the frame at this time slot place, first frame or last frame in the Transmission Time Interval of being made up of multiframe.Or, whether have the difference of time slot content before and after a certain time slot place frame and its between the frame: the content of this time slot is one and is specifically designed to and offers terminal and carry out synchronously, measure in this time slot place frame, or this time slot content is the configuration information of the single-frequency network area different with this time slot in this time slot place frame.
Process from information to terminal that transmit further comprises: if the reference symbol between crack and its preceding adjacent time-slots only comprises the second sub-reference symbol (PW) in short-term, then latter two long time slot of the former frame of this frame belongs to identical single-frequency network area, and this frame first time slot belongs to different single-frequency network areas with the last time slot of its former frame.If the reference symbol between crack and its preceding adjacent time-slots only comprises the first sub-reference symbol (PT) in short-term, then all time slots of this frame belong to identical single-frequency network area.If the reference symbol between crack and its preceding adjacent time-slots comprises the first sub-reference symbol (PT) and the second sub-reference symbol (PW) simultaneously in short-term, then this frame first time slot belongs to different single-frequency network areas with the last time slot of its former frame, and the crack in short-term of this frame belongs to different single-frequency network areas with adjacent thereafter long time slot.
Step S14: to clearly not belonging to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part in agreement or this configuration information, the base station is transmitted information by second sub-reference symbol (PW) of time slot before changing or the first sub-reference symbol (PT) of change back time slot to terminal.The front and back two adjacent timeslot numbers that belong to same single-frequency network area are the twices of the power of the single first sub-reference symbol (PT) or the second sub-reference symbol (PW) according to the transmitting power of the reference symbol between part.
Described here to preceding time slot the first sub-reference symbol (PT) and the change of the second sub-reference symbol (PW) comprise following one of them: the second sub-reference symbol (PW) is set to equate with the first sub-reference symbol (PT); The first sub-reference symbol (PT) is set to equate with the second sub-reference symbol (PW); The first sub-reference symbol (PT) or the second sub-reference symbol (PW) are set to the wherein known sub-reference symbol of terminal.
If the time slot in the frame belongs to two single-frequency network areas at most, and it is adjacent to belong to the time slot of identical single-frequency network area.If i time slot belongs to different single-frequency network areas with its preceding adjacent time-slots, then the method that the first sub-reference symbol (PT) and the second sub-reference symbol (PW) are changed comprises: the first sub-reference symbol (PT) and the second sub-reference symbol (PW) in the reference symbol (PreAmble) of (1) time slot i do not change; (2) first of the preceding time slot of the time slot i reference symbol (PT) changes the second sub-reference symbol (PW) into, that is these time slots send PW and do not send PT with double power; (3) second of the back time slot of the time slot i reference symbol (PW) changes the first sub-reference symbol (PT) into, that is these time slots send PT and do not send PW with double power.
Information to the terminal transmission in this step comprises: whether adjacent time-slots belongs to identical single-frequency network area.
By above-mentioned step S10～S14, the base station passes to terminal with the information whether adjacent time-slots belongs to identical single-frequency network area, so that terminal is to estimation merges to information in two skew windows, and then improves channel estimating performance.
Respective base station sends the method for information, and the present invention has also disclosed the terminal information method of reseptance.Figure 11 shows the flow process of the preferred embodiment of terminal method of reseptance.Seeing also Figure 11, is the detailed description to each process step in the method below.
Step S20: terminal receives the channel of base station transmission and the mapping relations information of time slot.
Step S21: terminal receives the configuration information of the time slot of base station transmission.
Step S22: to arrange or this time slot configuration information in clearly belong to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part (PreAmble), first sub-reference symbol (PT) of second sub-reference symbol (PW) of time slot and back time slot and the various combinations that change thereof received the information that transmit the base station before terminal detected.
Step S23: to clearly not belonging to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part (PreAmble) in agreement or this time slot configuration information, whether terminal changes by second sub-reference symbol (PW) of time slot before detecting or the first sub-reference symbol (PT) of back time slot, receives the information that transmit the base station.
Step S24: the first sub-reference symbol (PT) that terminal is occurred by the information that changes the first sub-reference symbol (PT) and the second sub-reference symbol (PW) and transmitted and contrast institute former and later two reference symbols of receiving slot data division according to the configuration information of the mapping relations information of channel and time slot, time slot, base station and the combination and the variation thereof of the second sub-reference symbol (PW), judge whether this time slot and its front and back time slot belong to same single-frequency network area.
The method of judging comprises: terminal detects ANOMALOUS VARIATIONS from two adjacent reference symbols of the front and back of a received time slot data division, these ANOMALOUS VARIATIONS are by base station and terminal agreement, and terminal judges according to these ANOMALOUS VARIATIONS whether this time slot and front and back time slot belong to same single-frequency network area.
The method of judging also comprises: if a plurality of adjacent time-slots is mapped on the same channel, judge that then these adjacent time-slots belong to same single-frequency network area.
The method of judging also comprises: whether the adjacent time-slots of launching according to the base station belongs to identical single-frequency network area is judged whether these adjacent time-slots belong to same single-frequency network area.
Step S25: to judging the front and back two adjacent timeslot numbers that belong to same single-frequency network area transmitting power according to the reference symbol between part, no matter whether its PW and PT part changes, and terminal thinks that all the transmitting power of this reference symbol is the twice of the power of the single first sub-reference symbol (PT) or the second sub-reference symbol (PW).
Step S26: to judging the channel estimating that the front and back two adjacent timeslot numbers that belong to same single-frequency network area are done according to the reference symbol between part, detected PT, PW occur or only occur once, and terminal all is considered as these channel estimating the estimated result of same channel.
Step S27: to judging the channel estimation results of all skew windows that belong to same channel, terminal moves to same skew window with it and adds up, and obtains total channel estimation results.
Step S28: to judging the channel estimating that the front and back two adjacent timeslot numbers that do not belong to same single-frequency network area are done according to the reference symbol between part, the channel estimating of time slot before terminal is considered as the corresponding channel estimating that is offset window of the second sub-reference symbol (PW), the channel estimating of the skew window that the first sub-reference symbol (PT) is corresponding is considered as the channel estimating of back time slot.
Step S29: terminal is according to the channel estimation results of each time slot reference symbol, the channel estimating parameter of calculated data part, and this data division carried out demodulation.
From above-mentioned steps S20～S29 as can be known, terminal judges goes out adjacent time-slots and whether belongs to identical single-frequency network area, so that the channel estimating in two skew windows is merged, and then improves channel estimating performance.
Based on above-mentioned base station sending method and terminal method of reseptance, the present invention combines base station process of transmitting and terminal receiving course, has disclosed the information method of sending and receiving that utilizes the reference symbol configuration variation in the single frequency network communication system.
Whole information transmitting/receiving method comprises process of transmitting that is positioned at the base station end and the receiving course that is positioned at terminal.The process of transmitting of base station end sees also above-mentioned embodiment shown in Figure 10, and its process is identical with this embodiment, does not therefore repeat them here.The receiving course of terminal sees also above-mentioned embodiment shown in Figure 11, and its process is identical with this embodiment, does not therefore repeat them here.
Below describe terminal by an example and how to judge according to the reference symbol detection case whether adjacent time-slots belongs to identical single-frequency network area.See also Fig. 5, with time slot i302 iBe example, time slot i302 iSub-reference symbol PT (i) 501 can be launched in the base station in affiliated SFN zone iWith belong to time slot (i+1) 302 I+1PW (i) 502 i, just, in the prior art, the data division of each time slot all has own described sub-reference symbol PT and PW, and they are to be sent by identical base station; Therefore, if detect PT under the time slot data division, the hypothesis that detects the PW of adjacent time-slots behind this time slot is rational.In other words, if a time slot PT is called " head ", the PW of subsequent time slot is called " tail ", the data division of a time slot should " have a beginning and an end " so.And " having a beginning but no end ", " have tail without a head " and " anury is without a head ", these three kinds of situations all are abnormal states of affairs.For example, at time slot i302 i, detected PT (i) 501 iBut at time slot i+1302 I+1, only detected PT (i+1) 502 I+1, but do not detect PW (i) 502 i, then be irrational.Because PT (i) 501 iExistence proved PW (i) 502 iShould exist.So UTRAN can utilize this detectable unusual, transmits information to UE, this information can be whether this time slot belongs to identical SFN zone with its front and back time slot.For example, after testing time slot i302 iThere is PT (i) 501 iThe time, if at time slot (i+1) 302 I+1Detect (i+1) 501 that have only PT I+1Existence, then explanation occurs unusually, and this is being represented unusually, time slot i302 iAnd time slot (i+1) 302 I+1Belong to identical SFN zone.
Fig. 9 shows terminal of the present invention according to the reference symbol detection case, to the time slot that base station and terminal are arranged in communication protocol, judges whether adjacent time-slots belongs to the state diagram of identical single-frequency network area.From this example, as can be seen, according to the appearance of " having a beginning but no end ", " have tail without a head " and abnormal conditions such as " anury are without a head ", judge whether adjacent time-slots belongs to identical single-frequency network area just.
Basis for estimation in this example is based on the Typical Disposition of base station end to each time slot reference symbol: the short-and-medium time slot of (1) agreement one frame belongs to identical single-frequency network area with preceding time slot; (2) to belong to the time slot of identical single-frequency network area in one frame adjacent for agreement; (3) agreement first time slot of belonging to first single-frequency network area is first time slot in the frame; (4) agreement or in short-term the crack belong to identical single-frequency network area with adjacent thereafter long time slot, perhaps in the frame latter two time slot belong to identical single-frequency network area; (5),, represent then in the frame that latter two time slot belongs to identical single-frequency network area if only comprise the second sub-reference symbol (PW) for crack reference symbol (PreAmble) in short-term; If only comprise the first sub-reference symbol (PT), represent that then all time slots belong to identical single-frequency network area in the frame; If comprise the first sub-reference symbol (PT) and the second sub-reference symbol (PW) simultaneously, represent that then first time slot belongs to different single-frequency network areas with the last time slot of its former frame in the frame, and this frame belongs to different single-frequency network areas with adjacent thereafter long time slot in the crack in short-term; (6), then all just comprise the first sub-reference symbol (PT) in the reference symbol of all time slots if all time slots all belong to identical single-frequency network area; (7) if all time slots belong to two single-frequency network areas, if the i time slot belongs to different single-frequency network areas with its preceding time slot, then before the i time slot, the reference symbol of all above-mentioned time slots of not arranging and disposing all only comprises the second sub-reference symbol (PW); The reference symbol of all above-mentioned time slots for agreement and configuration all only comprises the first sub-reference symbol (PT) after the i time slot.
In this case, the judgment mode of detection ANOMALOUS VARIATIONS sees also Fig. 9.Fig. 9 shows 4 states, and the detection case of the current time slots of each state representation terminal (for example i time slot) reference symbol is respectively a Sa state 901, has the first sub-reference symbol (PT) not have the second sub-reference symbol (PW); Sb state 902 has the first sub-reference symbol (PT) that the second sub-reference symbol (PW) is arranged; Sc state 903 has the first sub-reference symbol (PT) not have the second sub-reference symbol (PW); Sd state 904 does not have the first sub-reference symbol (PT) and does not have the second sub-reference symbol (PW).Wherein Sd state 904 explanation terminals have been left the single frequency network overlay area.
Each arrow shown in Fig. 9 is represented a variation, and the state of arrow indication is being represented the detection case of terminal to back adjacent time-slots (for example i+1 time slot) reference symbol.For example, representing terminal all just to detect the second sub-reference symbol (PW) and do not detected the first sub-reference symbol (PT) from the variation 911 of Sa state 901 to Sa states 901 at i time slot and i+1 time slot.
In all changes, it is that terminal can detected ANOMALOUS VARIATIONS that 4 kinds of variations are arranged: from the variation 911 of Sa state 901 to Sa states 901, from the variation 912 of Sa state 901 to Sb states 902, from the variation 914 of Sb state 902 to Sc states 903, from the variation 915 of Sc state 903 to Sc states 903.Therefore arrange with the terminal both sides in the base station: change 911 corresponding i time slots and belong to identical single-frequency network area with its front and back time slot; Change 912 corresponding i time slots and belong to identical single-frequency network area, may belong to different single-frequency network areas with subsequent time slot with its front and back time slot; Change 914 corresponding i time slots and belong to identical single-frequency network area, may belong to different single-frequency network areas with its preceding time slot with subsequent time slot; Change 915 corresponding i time slots and belong to identical single-frequency network area with its front and back time slot.The base station has utilized above-mentioned variation to transmit information to terminal just.In addition, the variation 913 from Sb state 902 to Sb states 902 is states of time slot relation before and after terminal can be determined.At this moment terminal can tentatively be judged, the i time slot may belong to different single-frequency network areas with its front and back time slot.
In other words, above-mentioned state is judged can think that also terminal is in two adjacent reference symbols of the front and back of certain received time slot data division, (1) if there is the first sub-reference symbol before detecting in the reference symbol the second sub-reference symbol is not arranged, do not have the first sub-reference symbol in the back reference symbol the second sub-reference symbol is arranged, judge that then the affiliated time slot of this data division and its front and back time slot belong to same single-frequency network area; (2) if there is the first sub-reference symbol before detecting in the reference symbol the second sub-reference symbol is not arranged, there is the first sub-reference symbol that the second sub-reference symbol is arranged in the back reference symbol, time slot time slot preceding with it belongs to same single-frequency network area under then judging this data division, and preliminary judgement belongs to different single-frequency network areas with subsequent time slot; (3) if having the first sub-reference symbol that the second sub-reference symbol is arranged in the reference symbol before detecting, there is the first sub-reference symbol that the second sub-reference symbol is arranged in the back reference symbol, judges tentatively that then the affiliated time slot of this data division belongs to different single-frequency network areas with its front and back time slot; (4) if having the first sub-reference symbol that the second sub-reference symbol is arranged in the reference symbol before detecting, there is the first sub-reference symbol not have the second sub-reference symbol in the back reference symbol, judge that then affiliated time slot of this data division and subsequent time slot belong to same single-frequency network area, preliminary judgement belongs to different single-frequency network areas with its preceding time slot; (5) if having the first sub-reference symbol not have the second sub-reference symbol in the reference symbol before detecting, there is the first sub-reference symbol not have the second sub-reference symbol in the back reference symbol, judges that then the affiliated time slot of this data division and its front and back time slot belong to same single-frequency network area.
Other variation the 921,922,923, the 924th among Fig. 9, the variation that may occur in the normal course of communications, so terminal can't change the relation of determining between the time slot according to these.
The foregoing description provides to those of ordinary skills and realizes or use of the present invention; those of ordinary skills can be under the situation that does not break away from invention thought of the present invention; the foregoing description is made various modifications or variation; thereby protection scope of the present invention do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that claims mention.

Claims (25)

1. utilize the base station information sending method of the variation of reference symbol configuration in the single frequency network communication system, this method comprises:
(1) base station belongs to the time slot of identical single-frequency network area according to communication protocol agreement configuration, and the time slot configuration that will belong to identical single-frequency network area is an adjacent time-slots;
(2) base station is to the mapping relations information of terminal transmitting channel and time slot;
(3) base station is to the configuration information of terminal sending time slots;
(4) to arrange or this configuration information in clearly belong to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part, the base station is transmitted information by sending the first sub-reference symbol and the second sub-reference symbol of preceding time slot and the various combinations of change of back time slot to terminal;
(5) to clearly not belonging to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part in agreement or this configuration information, the base station is transmitted information by second sub-reference symbol of time slot before changing or the first sub-reference symbol of change back time slot to terminal;
Wherein in step (4) and (5), the front and back two adjacent timeslot numbers that belong to same single-frequency network area are the twices of the power of the single first sub-reference symbol or the second sub-reference symbol according to the transmitting power of the reference symbol between part.
2. utilize the base station information sending method of the variation of reference symbol configuration in the single frequency network communication system according to claim 1, it is characterized in that, the combination in any of the following configuration mode of use disposes the time slot in the frame in the step (1):
With the short-and-medium time slot of a frame with its before adjacent long time slot configuration become to belong to identical single-frequency network area;
The short-and-medium time slot of one frame is become to belong to identical single-frequency network area with adjacent long time slot configuration thereafter;
Latter two time slot configuration in one frame is become to belong to identical single-frequency network area;
All time slot configuration in one frame are become to belong at most two single-frequency network areas.
3. utilize the base station information sending method of the variation of reference symbol configuration in the single frequency network communication system according to claim 2, it is characterized in that this configuration information in the step (3) comprises whether each time slot that belongs within the frame structure belongs to identical single-frequency network area and each time slot employed first sub-reference symbol and the second sub-reference symbol.
4. utilize the base station information sending method of the variation of reference symbol configuration in the single frequency network communication system according to claim 3, it is characterized in that the combination in the step (4) comprises: reference symbol only comprise before time slot the second sub-reference symbol, only comprise the back time slot the first sub-reference symbol or comprise simultaneously before time slot the second sub-reference symbol and the back time slot the first sub-reference symbol.
5. utilize the base station information sending method of the variation of reference symbol configuration in the single frequency network communication system according to claim 4, it is characterized in that the information to the terminal transmission in the step (4) comprises:
Whether these former and later two adjacent time-slots belong to identical single-frequency network area; Perhaps,
Whether distinct between frame before and after a certain time slot place frame and its: the frame at this time slot place, first frame or last frame in the Transmission Time Interval of forming by multiframe; Perhaps,
Whether have the difference of time slot content before and after a certain time slot place frame and its between the frame: the content of this time slot is one and is specifically designed to and offers terminal and carry out synchronously, measure in this time slot place frame, or this time slot content is the configuration information of the single-frequency network area different with this time slot in this time slot place frame.
6. utilize the base station information sending method of the variation of reference symbol configuration in the single frequency network communication system according to claim 5, it is characterized in that, step (4) is transmitted information to terminal and is further comprised:
If the reference symbol between crack and its preceding adjacent time-slots only comprises the second sub-reference symbol in short-term, then latter two long time slot of the former frame of this frame belongs to identical single-frequency network area, and this frame first time slot belongs to different single-frequency network areas with the last time slot of its former frame;
If the reference symbol between crack and its preceding adjacent time-slots only comprises the first sub-reference symbol in short-term, then all time slots of this frame belong to identical single-frequency network area;
If the reference symbol between crack and its preceding adjacent time-slots comprises the first sub-reference symbol and the second sub-reference symbol simultaneously in short-term, then this frame first time slot belongs to different single-frequency network areas with the last time slot of its former frame, and the crack in short-term of this frame belongs to different single-frequency network areas with adjacent thereafter long time slot.
7. utilize the base station information sending method of the variation of reference symbol configuration in the single frequency network communication system according to claim 6, it is characterized in that, the change described in the step (5) to the first sub-reference symbol of the second sub-reference symbol of preceding time slot or back time slot comprise following one of them: this second sub-reference symbol is set to equate with this first sub-reference symbol; This first sub-reference symbol is set to equate with this second sub-reference symbol; This first sub-reference symbol or this second sub-reference symbol are set to the known sub-reference symbol of other-end.
8. utilize the base station information sending method of the variation of reference symbol configuration in the single frequency network communication system according to claim 7, it is characterized in that the information to the terminal transmission in the step (5) comprises whether adjacent time-slots belongs to identical single-frequency network area.
9. utilize the end message method of reseptance of the variation of reference symbol configuration in the single frequency network communication system, this method of reseptance comprises:
(1) terminal receives the channel of base station transmission and the mapping relations information of time slot;
(2) terminal receives the configuration information of the time slot of base station transmission;
(3) to arrange or this configuration information in clearly belong to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part, the second sub-reference symbol of time slot and the first sub-reference symbol of back time slot and the various combinations of change thereof received the information that transmit the base station before terminal detected;
(4) to clearly not belonging to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part in agreement or this configuration information, whether terminal changes by second sub-reference symbol of time slot before detecting or the first sub-reference symbol of back time slot, receives the information that transmit the base station;
(5) the first sub-reference symbol that occurred by the information that changes the first sub-reference symbol and the second sub-reference symbol and transmit and contrast institute former and later two reference symbols of receiving slot data division according to the configuration information of the mapping relations information of this channel and time slot, this time slot, base station of terminal and the combination and the variation thereof of the second sub-reference symbol judge whether this time slot and its front and back time slot belong to same single-frequency network area;
(6) to judging the front and back two adjacent timeslot numbers that the belong to same single-frequency network area transmitting power according to the reference symbol between part, terminal thinks that all the transmitting power of this reference symbol is the twice of the power of the single first sub-reference symbol or the second sub-reference symbol;
(7) to judging the channel estimating that the front and back two adjacent timeslot numbers that belong to same single-frequency network area are done according to the reference symbol between part, terminal all is considered as those channel estimating the estimated result of same channel;
(8) to judging all channel estimation results that belong to same channel, terminal obtains total channel estimation results with its accumulative total;
(9) to judging the channel estimating that the front and back two adjacent timeslot numbers that do not belong to same single-frequency network area are done according to the reference symbol between part, the channel estimating of time slot before terminal is regarded the channel estimating of the second sub-reference symbol correspondence as, the channel estimating of the channel estimating of the first sub-reference symbol correspondence being regarded as the back time slot;
(10) terminal is according to the channel estimation results of each time slot reference symbol, the channel estimating parameter of calculated data part, and this data division carried out demodulation.
10. utilize the end message method of reseptance of the variation of reference symbol configuration in the single frequency network communication system according to claim 9, it is characterized in that, step (5) comprising: terminal detects ANOMALOUS VARIATIONS from two adjacent reference symbols of the front and back of a received time slot data division, those ANOMALOUS VARIATIONS are by base station and terminal agreement, and terminal judges according to those ANOMALOUS VARIATIONS whether this time slot and front and back time slot belong to same single-frequency network area.
11. utilize the end message method of reseptance of the variation of reference symbol configuration in the single frequency network communication system according to claim 10, it is characterized in that, step (5) also comprises: if a plurality of adjacent time-slots is mapped on the same channel, judge that then those adjacent time-slots belong to same single-frequency network area.
12. utilize the end message method of reseptance of the variation of reference symbol configuration in the single frequency network communication system according to claim 11, it is characterized in that step (5) also comprises: whether the adjacent time-slots of launching according to the base station belongs to identical single-frequency network area is judged whether those adjacent time-slots belong to same single-frequency network area.
13. utilize the information transmitting/receiving method of the variation of reference symbol configuration in the single frequency network communication system, this sending and receiving methods comprises:
The base station process of transmitting:
(1) base station belongs to the time slot of identical single-frequency network area according to communication protocol agreement configuration, and the time slot configuration that will belong to identical single-frequency network area is an adjacent time-slots;
(2) base station is to the mapping relations information of terminal transmitting channel and time slot;
(3) base station is to the configuration information of terminal sending time slots;
(4) to arrange or this configuration information in clearly belong to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part, the base station is transmitted information by sending the first sub-reference symbol and the second sub-reference symbol of preceding time slot and the various combinations of change of back time slot to terminal;
(5) to clearly not belonging to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part in agreement or this configuration information, the base station is transmitted information by second sub-reference symbol of time slot before changing or the first sub-reference symbol of change back time slot to terminal;
Wherein in step (4) and (5), the front and back two adjacent timeslot numbers that belong to same single-frequency network area are the twices of the power of the single first sub-reference symbol or the second sub-reference symbol according to the transmitting power of the reference symbol between part;
The terminal receiving course:
(a) terminal receives the channel of base station transmission and the mapping relations information of time slot;
(b) terminal receives the configuration information of the time slot of base station transmission;
(c) to arrange or this configuration information in clearly belong to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part, the second sub-reference symbol of time slot and the first sub-reference symbol of back time slot and the various combinations of change thereof received the information that transmit the base station before terminal detected;
(d) to clearly not belonging to the front and back two adjacent timeslot numbers of same single-frequency network area according to the reference symbol between part in agreement or this configuration information, whether terminal changes by second sub-reference symbol of time slot before detecting or the first sub-reference symbol of back time slot, receives the information that transmit the base station;
(e) the first sub-reference symbol that occurred by the information that changes the first sub-reference symbol and the second sub-reference symbol and transmit and contrast institute former and later two reference symbols of receiving slot data division according to the configuration information of the mapping relations information of this channel and time slot, this time slot, base station of terminal and the combination and the variation thereof of the second sub-reference symbol judge whether this time slot and its front and back time slot belong to same single-frequency network area;
(f) to judging the front and back two adjacent timeslot numbers that the belong to same single-frequency network area transmitting power according to the reference symbol between part, terminal thinks that all the transmitting power of this reference symbol is the twice of the power of the single first sub-reference symbol or the second sub-reference symbol;
(g) to judging the channel estimating that the front and back two adjacent timeslot numbers that belong to same single-frequency network area are done according to the reference symbol between part, terminal all is considered as those channel estimating the estimated result of same channel;
(h) to judging all channel estimation results that belong to same channel, terminal obtains total channel estimation results with its accumulative total;
(i) to judging the channel estimating that the front and back two adjacent timeslot numbers that do not belong to same single-frequency network area are done according to the reference symbol between part, the channel estimating of time slot before terminal is regarded the channel estimating of the second sub-reference symbol correspondence as, the channel estimating of the channel estimating of the first sub-reference symbol correspondence being regarded as the back time slot;
(j) terminal is according to the channel estimation results of each time slot reference symbol, the channel estimating parameter of calculated data part, and this data division carried out demodulation.
14. utilize the information transmitting/receiving method of the variation of reference symbol configuration in the single frequency network communication system according to claim 13, it is characterized in that the combination in any of the following configuration mode of the step of this base station process of transmitting (1) use disposes the time slot in the frame:
With the short-and-medium time slot of a frame with its before adjacent long time slot configuration become to belong to identical single-frequency network area;
The short-and-medium time slot of one frame is become to belong to identical single-frequency network area with adjacent long time slot configuration thereafter;
Latter two time slot configuration in one frame is become to belong to identical single-frequency network area;
All time slot configuration in one frame are become to belong at most two single-frequency network areas.
15. utilize the information transmitting/receiving method of the variation of reference symbol configuration in the single frequency network communication system according to claim 14, it is characterized in that this configuration information in the step of this base station process of transmitting (3) comprises whether each time slot that belongs within the frame structure belongs to identical single-frequency network area and each time slot employed first sub-reference symbol and the second sub-reference symbol.
16. utilize the information transmitting/receiving method of the variation of reference symbol configuration in the single frequency network communication system according to claim 15, it is characterized in that the combination in the step (4) in this base station process of transmitting comprises: reference symbol only comprise before time slot the second sub-reference symbol, only comprise the back time slot the first sub-reference symbol or comprise simultaneously before time slot the second sub-reference symbol and the back time slot the first sub-reference symbol.
17. utilize the information transmitting/receiving method of the variation of reference symbol configuration in the single frequency network communication system according to claim 16, it is characterized in that the step (4) in this base station process of transmitting comprises to the information of terminal transmission:
Whether these former and later two adjacent time-slots belong to identical single-frequency network area; Perhaps,
Whether distinct between frame before and after a certain time slot place frame and its: the frame at this time slot place, first frame or last frame in the Transmission Time Interval of forming by multiframe; Perhaps,
Whether have the difference of time slot content before and after a certain time slot place frame and its between the frame: the content of this time slot is one and is specifically designed to and offers terminal and carry out synchronously, measure in this time slot place frame, or this time slot content is the configuration information of the single-frequency network area different with this time slot in this time slot place frame.
18. utilize the information transmitting/receiving method of the variation of reference symbol configuration in the single frequency network communication system according to claim 17, it is characterized in that the step (4) in this base station process of transmitting is transmitted information to terminal and further comprised:
If the reference symbol between crack and its preceding adjacent time-slots only comprises the second sub-reference symbol in short-term, then latter two long time slot of the former frame of this frame belongs to identical single-frequency network area, and this frame first time slot belongs to different single-frequency network areas with the last time slot of its former frame;
If the reference symbol between crack and its preceding adjacent time-slots only comprises the first sub-reference symbol in short-term, then all time slots of this frame belong to identical single-frequency network area;
If the reference symbol between crack and its preceding adjacent time-slots comprises the first sub-reference symbol and the second sub-reference symbol simultaneously in short-term, then this frame first time slot belongs to different single-frequency network areas with the last time slot of its former frame, and the crack in short-term of this frame belongs to different single-frequency network areas with adjacent thereafter long time slot.
19. utilize the information transmitting/receiving method of the variation of reference symbol configuration in the single frequency network communication system according to claim 18, it is characterized in that, the change described in the step of this base station process of transmitting (5) to the second sub-reference symbol of preceding time slot or the back time slot first sub-reference symbol comprise following one of them: this second sub-reference symbol is set to equate with this first sub-reference symbol; This first sub-reference symbol is set to equate with this second sub-reference symbol; This first sub-reference symbol or this second sub-reference symbol are set to the known sub-reference symbol of other-end.
20. utilize the information transmitting/receiving method of the variation of reference symbol configuration in the single frequency network communication system according to claim 19, it is characterized in that the information to the terminal transmission in the step of this base station process of transmitting (5) comprises whether adjacent time-slots belongs to identical single-frequency network area.
21. utilize the information transmitting/receiving method of the variation of reference symbol configuration in the single frequency network communication system according to claim 20, it is characterized in that, the step of this terminal receiving course (e) comprising: terminal detects ANOMALOUS VARIATIONS from two adjacent reference symbols of the front and back of a received time slot data division, those ANOMALOUS VARIATIONS are by base station and terminal agreement, and terminal judges according to those ANOMALOUS VARIATIONS whether this time slot and front and back time slot belong to same single-frequency network area.
22. utilize the information transmitting/receiving method of the variation of reference symbol configuration in the single frequency network communication system according to claim 21, it is characterized in that, the step of this terminal receiving course (e) also comprises: if a plurality of adjacent time-slots is mapped on the same channel, judge that then those adjacent time-slots belong to same single-frequency network area.
23. utilize the information transmitting/receiving method of the variation of reference symbol configuration in the single frequency network communication system according to claim 22, it is characterized in that the step of this terminal receiving course (e) also comprises: whether the adjacent time-slots of launching according to the base station belongs to identical single-frequency network area is judged whether those adjacent time-slots belong to same single-frequency network area.
24. utilize the information transmitting/receiving method of the variation of reference symbol configuration in the single frequency network communication system according to claim 13, it is characterized in that being configured to each time slot reference symbol in this base station process of transmitting:
The preceding time slot configuration of the short-and-medium time slot of one frame and its is become to belong to identical single-frequency network area;
The time slot configuration that belongs to identical single-frequency network area in one frame is become adjacent;
To belong to first time slot in first time slot configuration framing of first single-frequency network area;
Crack is in short-term become to belong to identical single-frequency network area with adjacent thereafter long time slot configuration, perhaps with in the frame latter two time slot configuration become to belong to identical single-frequency network area;
For crack reference symbol in short-term,, represent then in the frame that latter two time slot belongs to identical single-frequency network area if only comprise the second sub-reference symbol; If only comprise the first sub-reference symbol, represent that then all time slots belong to identical single-frequency network area in the frame; If comprise the first sub-reference symbol and the second sub-reference symbol simultaneously, represent that then first time slot of frame belongs to different single-frequency network areas with the last time slot of its former frame, and the crack in short-term of this frame belongs to different single-frequency network areas with adjacent thereafter long time slot;
If all time slots all belong to identical single-frequency network area, then the reference symbol of all time slots all only comprises the first sub-reference symbol;
If all time slots belong to two different single-frequency network areas, one time slot belongs to different single-frequency network areas with its preceding time slot, then all before this time slot are not arranged and the reference symbol of the time slot that disposes all only comprises the second sub-reference symbol, and all after this time slot are not arranged and the reference symbol of the time slot that disposes all only comprises the first sub-reference symbol.
25. utilize the information transmitting/receiving method of the variation of reference symbol configuration in the single frequency network communication system according to claim 24, it is characterized in that, in the step of terminal receiving course (e) by the judgment mode that detects ANOMALOUS VARIATIONS be:
In two adjacent reference symbols of the front and back of certain received time slot data division of terminal, (1) if do not have the first sub-reference symbol before detecting in the reference symbol and the second sub-reference symbol arranged, do not have the first sub-reference symbol in the back reference symbol and the second sub-reference symbol is arranged, judge that then the affiliated time slot of this data division and its front and back time slot belong to same single-frequency network area; (2) if do not have the first sub-reference symbol before detecting in the reference symbol and the second sub-reference symbol arranged, the first sub-reference symbol is arranged in the back reference symbol and the second sub-reference symbol is arranged, time slot time slot preceding with it belongs to same single-frequency network area under then judging this data division, and preliminary judgement belongs to different single-frequency network areas with subsequent time slot; (3) if the first sub-reference symbol is arranged and the second sub-reference symbol is arranged in the reference symbol before detecting, the first sub-reference symbol is arranged in the back reference symbol and the second sub-reference symbol is arranged, judge tentatively that then the affiliated time slot of this data division belongs to different single-frequency network areas with its front and back time slot; (4) if the first sub-reference symbol is arranged and the second sub-reference symbol is arranged in the reference symbol before detecting, the first sub-reference symbol is arranged in the back reference symbol and do not have the second sub-reference symbol, judge that then affiliated time slot of this data division and subsequent time slot belong to same single-frequency network area, preliminary judgement belongs to different single-frequency network areas with its preceding time slot; (5) if the first sub-reference symbol is arranged and does not have the second sub-reference symbol in the reference symbol before detecting, the first sub-reference symbol is arranged in the back reference symbol and do not have the second sub-reference symbol, judge that then the affiliated time slot of this data division and its front and back time slot belong to same single-frequency network area.
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CN1658528A (en) * 2004-02-20 2005-08-24 电子科技大学 Adaptive channel estimation method of MIMO-OFDM system
CN1960353A (en) * 2005-10-31 2007-05-09 华为技术有限公司 Method and system of setting up reference signal for multiplexing service data

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Publication number Priority date Publication date Assignee Title
CN1658528A (en) * 2004-02-20 2005-08-24 电子科技大学 Adaptive channel estimation method of MIMO-OFDM system
CN1960353A (en) * 2005-10-31 2007-05-09 华为技术有限公司 Method and system of setting up reference signal for multiplexing service data

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