CN101742698A - Indication and acquisition method, device and system of CP length configuration - Google Patents
Indication and acquisition method, device and system of CP length configuration Download PDFInfo
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Abstract
The embodiment of the invention discloses an indication method of CP length configuration, comprising the following steps of: setting a specific subframe configuration option which corresponds to the CP length configuration in a specific subframe configuration table and a specific subframe configuration index corresponding to the specific subframe configuration option; indicating the CP length configuration used by a cell by sending specific subframe configuration information to user equipment UE; wherein the specific subframe configuration information presents the specific subframe configuration index which corresponds to the specific subframe configuration option used by the cell; after a system introduces the CP length configuration in which the up CP length and the down CP length are unequal, the UE can acquire the CP length configuration used by the cell according to the specific subframe configuration information. The embodiment of the invention also discloses device and system of the CP length configuration and acquisition method and device of the CP length configuration.
Description
Technical field
The present invention relates to wireless communication technology, relate in particular to a kind of indication technology of cyclic prefix CP length configuration, a kind of technology of obtaining of cyclic prefix CP length configuration.
Background technology
In OFDM (orthogonal frequency division multiple access OFDM) system; propagate the intersymbol interference cause and the interference between the subcarrier in order to overcome channel multi-path, add CP (cyclic prefix Cyclic Prefix) at interval as protection at the head of OFDM symbol.CP length should be not less than the time delay expansion of channel.Therefore, in practical communication system, need be at different cell environments, as, radius of society, multipath transmisstion etc., configuration corresponding C P length.As, in LTE (Long TermEvolvement Long Term Evolution) system, be provided with two kinds of CP length: extended CP (expansion CP) and normal CP (conventional CP).Therefore, can there be following 2 kinds of CP length configuration modes:
1. uplink CP length and descending CP equal in length: be extended CP or normal CP;
2. uplink CP length and descending CP are uneven in length, and comprising: descending extended CP, up normal CP; Perhaps descending normal CP, up extended CP.
In the prior art, the CP length of LTE TDD (Time Division Duplex time division duplex) system's support is configured to uplink CP length and descending CP equal in length.Therefore, UE need not indicate, and knows that promptly the CP length that use the sub-district is configured to uplink CP length and descending CP equal in length.Thereby UE also can be known uplink CP length detect descending CP length when down-going synchronous is carried out in initial access after.In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: after the configuration that the introducing uplink and downlink CP of LTE TDD system is uneven in length, UE can't know which kind of CP length configuration the sub-district uses.
Summary of the invention
The embodiment of the invention provides a kind of indicating means of CP length configuration, makes the base station can utilize the special subframe configuration information to dispose to the CP length that the UE indicating cell uses.
The embodiment of the invention discloses a kind of indicating means of cyclic prefix CP length configuration, comprise: in the special subframe allocation list, be provided with and the corresponding special subframe config option of CP length configuration, and the special subframe configuration index of above-mentioned special subframe config option correspondence; By sending the special subframe configuration information to user equipment (UE), the CP length configuration that indicating cell uses; Above-mentioned special subframe configuration information is represented the special subframe configuration index of the special subframe config option correspondence that use above-mentioned sub-district.
The embodiment of the invention discloses a kind of acquisition methods of cyclic prefix CP length configuration, comprise: in the special subframe allocation list, be provided with and the corresponding special subframe config option of CP length configuration, and the special subframe configuration index of above-mentioned special subframe config option correspondence; By receiving the special subframe configuration information that the base station sends, obtain the CP length configuration of using the sub-district; Above-mentioned special subframe configuration information is represented the special subframe configuration index of the special subframe config option correspondence that use above-mentioned sub-district.
The embodiment of the invention discloses a kind of base station, comprising: dispensing unit, be used for being provided with and the corresponding special subframe config option of CP length configuration at the special subframe allocation list, and the special subframe configuration index of above-mentioned special subframe config option correspondence; Transmitting element is used for by send the CP length configuration that special subframe configuration information indicating cell uses to UE; Above-mentioned special subframe configuration information is represented the special subframe configuration index of the special subframe config option correspondence that use above-mentioned sub-district.
The embodiment of the invention discloses a kind of subscriber equipment, comprising: dispensing unit, be used for being provided with and the corresponding special subframe config option of CP length configuration at the special subframe allocation list, and the special subframe configuration index of above-mentioned special subframe config option correspondence; Receiving element is used to receive the special subframe configuration information that the base station sends; Acquiring unit is used for the special subframe configuration information according to the receiving element reception, obtains the CP length configuration of using the sub-district.
The embodiment of the invention also discloses a kind of indication mechanism of cyclic prefix CP length configuration, comprise the base station, be used for communicating with subscriber equipment, it is characterized in that, above-mentioned base station also is used for being provided with and the corresponding special subframe config option of CP length configuration at the special subframe allocation list, and the special subframe configuration index of above-mentioned special subframe config option correspondence; By send the CP length configuration that special subframe configuration information indication UE is current or neighbor cell uses to UE; This special subframe configuration information is represented the special subframe configuration index of the special subframe config option correspondence that use above-mentioned sub-district.
By relatively finding that a technical scheme in the technique scheme compared with prior art has following advantage or beneficial effect:
In the embodiment of the invention,, reach the special subframe configuration index of described special subframe config option correspondence by the special subframe config option that in the special subframe allocation list, is provided with and the configuration of CP length is corresponding; Send the special subframe configuration information to user equipment (UE), the CP length configuration that indicating cell uses; This special subframe configuration information is the special subframe configuration index of the special subframe config option correspondence of above-mentioned sub-district use; Make UE can know the CP length configuration of sub-district by this special subframe configuration information.
Description of drawings
Fig. 1 is a LTE TDD special subframe structural representation;
Figure 2 shows that the indicating means schematic diagram of the CP length configuration that the embodiment of the invention 1 provides;
Figure 3 shows that the base station schematic diagram that the embodiment of the invention 3 provides;
The user equipment (UE) schematic diagram that provides of the embodiment of the invention 4 is provided;
Figure 5 shows that indication mechanism schematic diagram according to the CP length configuration of the embodiment of the invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention is clearer, various embodiments of the present invention are described in further detail below in conjunction with accompanying drawing.
In the subframe structure of LTE TDD system definition, there is Special Subframe (special subframe), provides protection last/downlink transfer conversion.Special subframe comprises three part time slot: DwPTS (Down pilottransmission slot downlink transfer time slot), is used for the transmission of descending synchronous signal channel, down control channel and downstream data channel; GP (Guard Period protects at interval) provides/the downlink transfer translation and protection time; UpPTS (Uplink pilot transmission slot uplink time slot) is used for the transmission of out-hole run pilot tone and accidental access signal.The special subframe structure as shown in Figure 1.
Cell environment difference according to system applies, at present LTE TDD system is in the 9 kinds of special subframes configurations of having given a definition of the situation of uplink CP length and descending CP equal in length, as shown in table 1: the length of DwPTS, GP, UpPTS has multiple combination in the special subframe, constitute different special subframe config options, use normal CP and up-downgoing to use the special subframe under the extended CP situation to dispose simultaneously simultaneously at up-downgoing respectively.The corresponding Special subframe configuration index (special subframe configuration index) of each config option.In the table 1, T
sBe the time quantum of LTE physical layer definition, T
s=1/ (15000 * 2048) second.The base station provides corresponding signaling bit notice UE the special subframe configuration that use the sub-district in system broadcast information.
Table 1
The embodiment of the invention 1 provides a kind of indicating means of CP length configuration, specifically comprises:
Step 101, in the special subframe allocation list, be provided with and the corresponding special subframe config option of CP length configuration, reach the special subframe configuration index of above-mentioned special subframe config option correspondence.
Above-mentioned special subframe config option comprises: the special subframe config option under uplink CP length and the descending CP equal in length situation, and/or, uplink CP length and the descending CP special subframe config option under the situation that is uneven in length.This special subframe config option is the combination of the length-specific of DwPTS and/or GP and/or UpPTS.
Need to prove, owing to not only comprised the time slot of downlink transfer in the special subframe but also comprised the time slot of uplink, if consider the situation that uplink CP length and descending CP are uneven in length, increase corresponding special subframe config option, use different CP length with the OFDM symbol of UpPTS part to realize DwPTS.
Step 102, by sending the special subframe configuration information to user equipment (UE), the CP length configuration that indicating cell uses.
Above-mentioned sub-district is: sub-district, the current place of UE; Perhaps, the neighbor cell of sub-district, the current place of UE.The CP length configuration that use above-mentioned sub-district comprises: uplink CP length and descending CP equal in length; Perhaps, uplink CP length and descending CP are uneven in length.
This special subframe configuration information is represented the special subframe configuration index of the special subframe config option correspondence that use described sub-district.The base station is current or above-mentioned which kind of the special subframe config option of the concrete use of neighbor cell by special subframe configuration information notice UE.
Of particular note, because the UpPTS in the special subframe is used for the transmission of frequency pilot sign, therefore, its CP length can be equal to the CP length of frequency pilot sign.The CP length of frequency pilot sign can or not wait with the CP equal in length of data symbol.
When the CP of the CP of frequency pilot sign length and data symbol equal in length, special subframe configuration information indication uplink CP length and the configuration of descending CP length in fully can be by the way; When the CP of the CP of frequency pilot sign length and data symbol is uneven in length, can indicate the CP length of ascending pilot frequency symbol and the CP length of descending pilot frequency symbol whether to equate by middle by the way special subframe configuration information, such as, whether the CP length of UpPTS and DwPTS equates, of particular note frequency pilot sign may be arranged in special subframe, also can be arranged in common subframe.In addition, can whether equate the CP length of perhaps independent designation data symbol with the CP length of frequency pilot sign by the CP length of independent indication information designation data symbol.Above-mentioned independent indication information can be 1bit, the CP equal in length of designation data symbol and frequency pilot sign or do not wait, or the CP length of independent designation data symbol.
Also need to prove, when situation that the CP that exists up special subframe and up common subframe to use is uneven in length, can indicate the CP length of up special subframe and the CP length of descending sub frame whether to equate by middle by the way special subframe configuration information, in addition, can indicate the CP length of up special subframe and up common subframe whether to equate by independent indication information.Whether this independent indication information can be 1bit, indicate the CP length of up special subframe and up common subframe to equate; Perhaps, when the CP of the common subframe of difference length did not wait yet, this independent indication information can expand to Nbit, the CP length of the different up common subframes of indication.Above-mentioned up special subframe comprises: the UpPTS part in the special subframe, or the sub-frame of uplink that comprises the pilot signal that is used for channel measurement of default.
By the method in the foregoing description, making both can be under the CP of the CP of frequency pilot sign length and data symbol equal in length situation, by the configuration of special subframe configuration information indication up-downgoing CP length; Under the situation that also can be uneven in length at the CP of the CP of frequency pilot sign length and data symbol, by the CP length configuration of special subframe configuration information indication up-downgoing frequency pilot sign, and can be by the CP length configuration of independent indication information designation data symbol; Can also indicate the CP equal in length of the CP length of up special subframe and descending sub frame or do not wait by the special subframe configuration information, and under the situation that the CP of the common subframe of difference is uneven in length, by the CP length configuration of the different up common subframes of independent indication information indication.Thereby the system that makes can support CP length configuration mode more flexibly.Above-mentioned indicating means also can be applied in LTE FDD (the Frequency Division Duplex Frequency Division Duplexing (FDD)) system.
Below the present embodiment method is illustrated:
Special subframe config option under uplink CP length and the descending CP equal in length situation can be according to cell uplink and descending propagation delay, and the transmission of base station and UE and receive factor such as change-over time and determine.
If under the situation of uplink CP length and descending CP equal in length, adopt special subframe config option as shown in table 1;
Then under the situation that uplink CP length and descending CP are uneven in length, can corresponding increase special subframe configuration as shown in table 2, comprising: suppose that normal CP length is T
Normal, extended CP length is T
Extended, UpPTS comprises N OFDM symbol.Instantly exercise and use normal CP, during up use extended CP, with respect to the configuration of normal CP in the table 1, keep the length of DwPTS constant, increase the length of UpPTS, reduce the length of GP, the length of length that UpPTS increases and GP minimizing is N (T
Extended-T
Normal); Instantly exercise and use extended CP, during up use normal CP, with respect to the configuration of extended CP in the reference table 1, keep the length of DwPTS constant, reduce the length of UpPTS, increase the length of GP, the length that length that UpPTS reduces and GP increase is N (T
Extended-T
Normal).
Illustrate below, such as, the CP length that defines in the LTE system frame structure is: normalCP=144T
s, extended CP=512T
sWhen uplink CP was extended CP, if UpPTS comprises an OFDM symbol, then the length of UpPTS increased 512T with respect to the UpPTS length under the up normal CP situation
s-144T
s=368T
s, corresponding, the contraction in length 368T of GP
sIf UpPTS comprises two OFDM symbols, then the length of UpPTS increases by 2 * (512T with respect to the UpPTS length under the up normal CP situation
s-144T
s)=736T
s, corresponding, the contraction in length 736T of GP
sWhen uplink CP was normal CP, if UpPTS comprises an OFDM symbol, then the length of UpPTS reduced 512T with respect to the UpPTS length under the up extended CP situation
s-144T
s=368T
s, corresponding, the length of GP increases 368T
sIf UpPTS comprises two OFDM symbols, then the length of UpPTS reduces by 2 * (512T with respect to the UpPTS length under the up normal CP situation
s-144T
s)=736T
s, corresponding, the length of GP increases 736T
s
Table 2 uplink CP length and the descending CP special subframe configuration under the situation that is uneven in length
As shown in table 1, LTE TDD is in the 9 kinds of special subframes configuration of having given a definition of the situation of uplink CP length and descending CP equal in length.System can indicate this 9 kinds of subframe configurations with the 4bit signaling.
Owing to utilize the 4bit signaling can represent 16 kinds of subframe configuration modes altogether, can utilize 7 kinds of newly-increased shown in the remaining state dial gauge 2 subframe configurations.Thereby table 1 and table 2 can merge, and be as shown in table 3.Wherein, the special subframe configuration index is the situation that 0～8 special subframe config option is used for uplink CP length and descending CP equal in length, and the special subframe configuration index is that 9～15 special subframe config option is used for the situation that uplink CP length and descending CP are uneven in length.
Thereby when UE received that the special subframe configuration information is a value in 0000～1000, promptly the special subframe configuration index was a value accordingly in 0～8, can judge the sub-district use equal in length uplink CP and descending CP; When UE received that the special subframe configuration information is a value in 1001～1111, promptly the special subframe configuration index was a value accordingly in 9～15, can judge the sub-district use be uneven in length uplink CP and descending CP.
Table 3
In judging concrete CP length process, UE at first goes out descending sub frame CP length by synchronization signal detection, again according to the special subframe configuration information, judges whether the uplink CP of sub-district use and the length of descending CP equate, and then the uplink CP length of definite sub-district use.
For example, up extend CP is adopted in the sub-district, descending normal CP, and the special subframe config option of employing Special subframeconfiguration index=10; UE detects descending CP when carrying out down-going synchronous be normal CP; The base station can comprise the special subframe configuration information of expression Special subframe configurationindex=10 and inform UE in the mode of broadcasting in system information, after UE receives this special subframe configuration information, inquire about special subframe configuration index and the corresponding special subframe config option corresponding in the special subframe allocation list of self storing with this special subframe configuration information, can determine that uplink CP length is different from descending CP length, promptly uplink CP adopts extended CP.
Further, UE can inquire about the special subframe config option corresponding with this special subframe configuration information in the special subframe allocation list of self storing, thereby knows the configuration information of DwPTS and/or GP and/or UpPTS.
Of particular note, the special subframe allocation list that is provided with in the special subframe allocation list of above-mentioned UE self storage and the base station is identical.
In the present embodiment, utilize the special subframe configuration information to indicate the configuration of CP length, and do not increase extra signaling consumption, reduced system's implementation complexity.And then, make UE can utilize the CP length configuration of this special subframe configuration information indication, when carrying out down-going synchronous, detect descending CP length in conjunction with it, judge uplink CP length.
The embodiment of the invention 2 provides a kind of acquisition methods of CP length configuration, specifically comprises:
Step 201, in the special subframe allocation list, be provided with and the corresponding special subframe config option of CP length configuration, reach the special subframe configuration index of above-mentioned special subframe config option correspondence.
Among the collocation method of this special subframe allocation list and the embodiment 1 in the base station collocation method of special subframe allocation list identical, do not repeat them here.This special subframe allocation list is identical with the special subframe allocation list that preserve the base station.
Step 202, by receiving the special subframe configuration information that the base station sends, obtain the CP length configuration of using the sub-district.
Above-mentioned sub-district is: sub-district, the current place of UE; Perhaps, the neighbor cell of sub-district, the current place of UE.The CP length configuration that use above-mentioned sub-district comprises: uplink CP length and descending CP equal in length; Perhaps, uplink CP length and descending CP are uneven in length.
This special subframe configuration information is represented the special subframe configuration index of the special subframe config option correspondence that use described sub-district.
The above-mentioned concrete mode of obtaining the CP length configuration of using the sub-district can be: after UE receives this special subframe configuration information, inquire about special subframe configuration index and the corresponding special subframe config option corresponding in the special subframe allocation list of self storing with this special subframe configuration information, thereby what judge this special subframe configuration information correspondence is the situation of uplink CP length and descending CP equal in length, or the situation that uplink CP length and descending CP are uneven in length is promptly known the configuration of CP length.
UE can also be known the configuration information of DwPTS and/or GP and/or UpPTS by the special subframe config option corresponding with this special subframe configuration information in the special subframe allocation list of inquiry self storage.
Further, UE can utilize the CP length configuration of this special subframe configuration information indication, detects descending CP length in conjunction with it when carrying out down-going synchronous, judges uplink CP length.Concrete judgment mode is described with embodiment 1, does not repeat them here.
In the present embodiment, UE can judge the CP length configuration of using the sub-district according to the special subframe configuration information that the base station sends, and can detect descending CP length when carrying out down-going synchronous in conjunction with it, judges uplink CP length.
When the CP length of the frequency pilot sign of sub-district and data symbol was unequal, UE can be known the CP length of frequency pilot sign according to the special subframe configuration information of receiving, and by receiving the independent indication information that the base station sends, knew the CP length of data symbol.The concrete indicating mode of above-mentioned independent indication information, roughly the same with mode described in the embodiment 1, do not repeat them here.
When situation that the CP that exists up special subframe and up common subframe to use is uneven in length, UE can be known the CP length of up special subframe according to the special subframe configuration information of receiving, and, know whether the CP length of up special subframe and up common subframe equates by receiving the independent indication information that the base station sends; Perhaps, when the CP of the common subframe of difference length does not wait yet,, know the CP length configuring condition of different common subframes by receiving the independent indication information that the base station sends.The concrete indicating mode of above-mentioned independent indication information, roughly the same with mode described in the embodiment 1, do not repeat them here.
The method that is provided in the present embodiment makes the LTE system can support CP length configuration mode more flexibly.
Of particular note, in the method that embodiment 1,2 provides, the bit number of special subframe configuration information can be determined by the specific configuration options number, be not limited to the middle for example 4bit that uses of the foregoing description, promptly in some system, perhaps do not adopt the special subframe configuration information of 4bit, but, can not think thus that the technical scheme in the embodiment of the invention can not be applicable to these systems.For example, when config option was 17～32 kinds, then the special subframe configuration information can use 5bit to represent; By that analogy.
Of particular note, in the method that embodiment 1,2 provides, special subframe config option and special subframe configuration index are not limited to the corresponding relation of the foregoing description in for example, promptly in some system, perhaps adopt other corresponding relation, as the special subframe configuration index is that 0～6 special subframe config option is used for the situation that uplink CP length and descending CP are uneven in length, the special subframe configuration index is the situation that 7～15 special subframe config option is used for uplink CP length and descending CP equal in length, or other corresponding relation.But, can not think thus that the technical scheme in the embodiment of the invention can not be applicable to these systems.
The method in the foregoing description that it is pointed out that is applicable to that also other has the multi-carrier-wave TDD system of special subframe configuration, as LTE Advance (long-term evolving network enhancing).
One of ordinary skill in the art will appreciate that, all or part of step in the various embodiments described above can realize by the relevant hardware of program command, described program can be stored in the computer read/write memory medium, and described storage medium can be ROM/RAM, magnetic disc, CD etc.
Figure 3 shows that a kind of base station that the embodiment of the invention 3 provides, comprising: dispensing unit 301 and transmitting element 302.Wherein, dispensing unit 301 is used for being provided with and the corresponding special subframe config option of CP length configuration at the special subframe allocation list, and the special subframe configuration index of above-mentioned special subframe config option correspondence; Transmitting element 302 is used for by send the CP length configuration that special subframe configuration information indication UE is current or neighbor cell uses to UE; This special subframe configuration information is represented the special subframe configuration index of the special subframe config option correspondence that use described sub-district.
Above-mentioned sub-district is: sub-district, the current place of UE; Perhaps, the neighbor cell of sub-district, the current place of UE.The CP length configuration that use above-mentioned sub-district comprises: uplink CP length and descending CP equal in length; Perhaps, uplink CP length and descending CP are uneven in length; Perhaps, the CP equal in length of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol; Perhaps, the CP of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol is uneven in length; Perhaps, the CP equal in length of the CP length of up special subframe and descending sub frame; Perhaps, the CP length of up special subframe and the CP of descending sub frame are uneven in length.
The method to set up of 301 pairs of special subframe allocation lists of dispensing unit is identical with the collocation method of special subframe allocation list described in the embodiment 1, does not repeat them here.
This base station may further include following at least one unit:
First indicating member, be used for being configured to the CP length of ascending pilot frequency symbol and the CP equal in length of descending pilot frequency symbol when the CP length that use the above-mentioned sub-district of above-mentioned transmitting element indication, when perhaps the CP of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol is uneven in length, send the first independent indication information, this first independent indication information comprises the indication whether the CP length of data symbol and frequency pilot sign is equated;
Second indicating member, be used for being configured to the CP length of ascending pilot frequency symbol and the CP equal in length of descending pilot frequency symbol when the CP length that use the above-mentioned sub-district of above-mentioned transmitting element indication, when perhaps the CP of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol is uneven in length, send the second independent indication information, this second independent indication information comprises the indication to the CP length of data symbol;
The 3rd indicating member, be used for being configured to the CP length of up special subframe and the CP equal in length of descending sub frame when the CP length that use the above-mentioned sub-district of above-mentioned transmitting element indication, when perhaps the CP of the CP length of up special subframe and descending sub frame is uneven in length, send the 3rd independent indication information, the 3rd independent indication information comprises the indication whether the CP length of up special subframe and up common subframe is equated;
The 4th indicating member, be used for being configured to the CP length of up special subframe and the CP equal in length of descending sub frame when the CP length that use the above-mentioned sub-district of above-mentioned transmitting element indication, when perhaps the CP of the CP length of up special subframe and descending sub frame is uneven in length, send the 4th independent indication information, the 4th independent indication information comprises the indication to the CP length of the up common subframe of difference.
This base station may further include memory cell, is used for the special subframe allocation list that stored configuration unit 301 is provided with.
Figure 4 shows that a kind of user equipment (UE) that the embodiment of the invention 4 provides, comprising: dispensing unit 401, receiving element 402 and acquiring unit 403.Wherein, dispensing unit 401 is used for being provided with and the corresponding special subframe config option of CP length configuration at the special subframe allocation list, and the special subframe configuration index of above-mentioned special subframe config option correspondence; Receiving element 402 is used to receive the special subframe configuration information that the base station sends; Acquiring unit 403 is used for the special subframe configuration information according to receiving element 402 receptions, obtains the CP length configuration of using the sub-district.
Above-mentioned sub-district is: sub-district, the current place of UE; Perhaps, the neighbor cell of sub-district, the current place of UE.The CP length configuration that use above-mentioned sub-district comprises: uplink CP length and descending CP equal in length; Perhaps, uplink CP length and descending CP are uneven in length; Perhaps, the CP equal in length of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol; Perhaps, the CP of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol is uneven in length; Perhaps, the CP equal in length of the CP length of up special subframe and descending sub frame; Perhaps, the CP length of up special subframe and the CP of descending sub frame are uneven in length.
The collocation method of 401 pairs of special subframe allocation lists of dispensing unit is identical with the collocation method of special subframe allocation list described in the embodiment 1, does not repeat them here.This special subframe allocation list is identical with the special subframe allocation list that preserve the base station.
The concrete mode that acquiring unit 403 obtains the CP length configuration of using the sub-district comprises: the corresponding special subframe configuration index of special subframe configuration information and the corresponding special subframe config option that receive with receiving element 402 in the special subframe allocation list that query configuration unit 401 is provided with, thereby what judge this special subframe configuration information correspondence is the situation of uplink CP length and descending CP equal in length, or the situation that uplink CP length and descending CP are uneven in length is promptly known the configuration of CP length.
This UE may further include following at least one unit:
First obtains indicating member, be used for being configured to the CP length of ascending pilot frequency symbol and the CP equal in length of descending pilot frequency symbol when the CP length that use the above-mentioned sub-district that above-mentioned acquiring unit obtains, when perhaps the CP of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol is uneven in length, by receiving the first independent indication information that the base station sends, know whether the CP length of data symbol and frequency pilot sign equates;
Second obtains indicating member, be used for being configured to the CP length of ascending pilot frequency symbol and the CP equal in length of descending pilot frequency symbol when the CP length that use the above-mentioned sub-district that above-mentioned acquiring unit obtains, when perhaps the CP of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol is uneven in length, by receiving the second independent indication information that the base station sends, know the CP length of data symbol;
The 3rd obtains indicating member, be used for being configured to the CP length of up special subframe and the CP equal in length of descending sub frame when the CP length that use the above-mentioned sub-district that above-mentioned acquiring unit obtains, when perhaps the CP of the CP length of up special subframe and descending sub frame is uneven in length, by receiving the 3rd independent indication information that the base station sends, know whether the CP length of up special subframe and up common subframe equates;
The 4th obtains indicating member, be used for being configured to the CP length of up special subframe and the CP equal in length of descending sub frame when the CP length that use the above-mentioned sub-district that above-mentioned acquiring unit obtains, when perhaps the CP of the CP length of up special subframe and descending sub frame is uneven in length, by receiving the 4th independent indication information that the base station sends, know the CP length of different up common subframes.
This UE may further include memory cell, is used for the special subframe allocation list that stored configuration unit 401 is provided with.
This UE can also comprise judging unit, is used for according to the detected descending CP length of down-going synchronous, in conjunction with the special subframe configuration information that receiving element receives, judges uplink CP length.
Of particular note, all or part of unit can be integrated in the chip and realize more than.
Introduce the mobile communcations system embodiment that the embodiment of the invention relates to below, this system can realize as the step described in the above-mentioned method embodiment, be understandable that, this system in the embodiment of the invention can also comprise other numerous entities of realizing communication function, belong to normalized technology in the communications field for the technology that may disclose in other prior art, repeat no more details in the present embodiment; But, only pointed out major part in this system here in order to introduce the implementation in the embodiment of the invention.See also Fig. 5, the indication mechanism of this CP length configuration comprises base station 502, be used for communicating with user equipment (UE) 501, wherein:
Base station 502 also is used for being provided with and the corresponding special subframe config option of CP length configuration at the special subframe allocation list, and the special subframe configuration index of above-mentioned special subframe config option correspondence; By send the CP length configuration that special subframe configuration information indication UE is current or neighbor cell uses to UE; This special subframe configuration information is represented the special subframe configuration index of the special subframe config option correspondence that use described sub-district.
Above-mentioned sub-district is: sub-district, the current place of UE; Perhaps, the neighbor cell of sub-district, the current place of UE.The CP length configuration that use above-mentioned sub-district comprises: uplink CP length and descending CP equal in length; Perhaps, uplink CP length and descending CP are uneven in length.
The method to set up of the 502 pairs of special subframe allocation lists in base station is identical with the collocation method of special subframe allocation list described in the embodiment 1, does not repeat them here.
The concrete grammar of the CP length configuration of base station 502 indication UE501 current area can be: base station 502 sends to UE501 with the special subframe configuration information, after UE501 receives this configuration information, inquire about special subframe index and the corresponding special subframe config option corresponding in the special subframe allocation list of self storing, can determine whether uplink CP length equates with descending CP length with this special subframe configuration information.
Further, if the situation that the corresponding uplink CP length of this special subframe configuration information and descending CP are uneven in length, then to detect descending CP when carrying out down-going synchronous be normal CP to UE, can judge uplink CP employing extended CP; If UE detects descending CP when carrying out down-going synchronous is extended CP, can judges uplink CP and adopt normal CP; If the situation of the corresponding uplink CP length of this special subframe configuration information and descending CP equal in length, then to detect descending CP when carrying out down-going synchronous be normal CP to UE, can judge uplink CP employing normal CP; If UE detects descending CP when carrying out down-going synchronous is extendedCP, can judges uplink CP and adopt extended CP.
Above-mentioned cell configuration can also comprise: the CP length of ascending pilot frequency symbol and the CP equal in length of descending pilot frequency symbol; Perhaps, the CP of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol is uneven in length; Perhaps, the CP equal in length of the CP length of up special subframe and descending sub frame; Perhaps, the CP length of up special subframe and the CP of descending sub frame are uneven in length.
Each functional unit in each embodiment of the present invention can be integrated in the processing module, also can be that the independent physics in each unit exists, and also can be integrated in the module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If described integrated module realizes with the form of software function module and during as independently production marketing or use, also can be stored in the computer read/write memory medium.The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
Accompanying drawing and associated description are not to be used to limit protection scope of the present invention just for principle of the present invention is described.For example, the message name in the various embodiments of the present invention can change according to the different of network to some extent with entity, and some message also can be omitted.Therefore, all any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all be included in protection scope of the present invention.
Though by with reference to some preferred embodiment of the present invention, the present invention is illustrated and describes, those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (27)
1. the indicating means of a cyclic prefix CP length configuration is characterized in that, comprising:
In the special subframe allocation list, be provided with and the corresponding special subframe config option of CP length configuration, and the special subframe configuration index of described special subframe config option correspondence;
By sending the special subframe configuration information to user equipment (UE), the CP length configuration that indicating cell uses;
Described special subframe configuration information is represented the special subframe configuration index of the special subframe config option correspondence that use described sub-district.
2. according to the described method of claim 1, it is characterized in that the CP length configuration that use described sub-district comprises:
Uplink CP length and descending CP equal in length;
Uplink CP length and descending CP are uneven in length.
3. according to the described method of claim 1, it is characterized in that,
Described special subframe config option comprises:
Special subframe config option under uplink CP length and the descending CP equal in length situation,
And/or, uplink CP length and the descending CP special subframe config option under the situation that is uneven in length.
4. according to the described method of claim 3, it is characterized in that,
Described special subframe config option by: downlink transfer time slot DwPTS and/or protection at interval the length of GP and/or uplink time slot UpPTS form;
Instantly exercise and use conventional CP, when CP was expanded in up use, the special subframe config option that described uplink CP length and descending CP are uneven in length under the situation comprised:
With respect to uplink CP length and descending CP equal in length and be the special subframe config option of conventional CP, keep the length of described DwPTS constant, increase the length of described UpPTS, reduce the length of described GP, the length that length that described UpPTS increases and described GP reduce is N (T
Extended-T
Normal);
Instantly exercise with expansion CP, during the conventional CP of up use, the special subframe config option that described uplink CP length and descending CP are uneven in length under the situation comprises:
With respect to uplink CP length and descending CP equal in length and be the special subframe config option of expansion CP, keep the length of described DwPTS constant, reduce the length of described UpPTS, increase the length of described GP, the length that length that described UpPTS reduces and described GP increase is N (T
Extended-T
Normal);
Wherein, T
NormalBe conventional CP length, T
ExtendedBe expansion CP length, N is the OFDM symbol numbers that UpPTS comprises.
5. according to the described method of claim 1, it is characterized in that described sub-district is:
Sub-district, the current place of UE;
Perhaps, the neighbor cell of sub-district, the current place of UE.
6. according to the described method of claim 1, it is characterized in that the CP length configuration that use described sub-district comprises:
The CP length of ascending pilot frequency symbol and the CP equal in length of descending pilot frequency symbol;
The CP length of ascending pilot frequency symbol and the CP of descending pilot frequency symbol are uneven in length.
7. according to the described method of claim 6, it is characterized in that described method further comprises:
Whether the CP length by the first independent indication information designation data symbol and frequency pilot sign equates;
Perhaps, the CP length by the second independent indication information designation data symbol.
8. according to the described method of claim 1, it is characterized in that the CP length configuration that use described sub-district comprises:
The CP length of up special subframe and the CP equal in length of descending sub frame;
The CP length of up special subframe and the CP of descending sub frame are uneven in length.
9. described according to Claim 8 method is characterized in that described method further comprises:
Indicate the CP length of up special subframe and up common subframe whether to equate by the 3rd independent indication information;
Perhaps, when the CP of the common subframe of difference is uneven in length, indicate the CP length of the up common subframe of described difference by the 4th independent indication information.
10. a method of obtaining the configuration of CP length is characterized in that, comprising:
In the special subframe allocation list, be provided with and the corresponding special subframe config option of CP length configuration, and the special subframe configuration index of described special subframe config option correspondence;
By receiving the special subframe configuration information that the base station sends, obtain the CP length configuration of using the sub-district;
Described special subframe configuration information is represented the special subframe configuration index of the special subframe config option correspondence that use described sub-district.
11., it is characterized in that the CP length configuration that use described sub-district comprises according to the described method of claim 10:
Uplink CP length and descending CP equal in length;
Perhaps, uplink CP length and descending CP are uneven in length.
12. according to the described method of claim 11, it is characterized in that, described by receiving the special subframe configuration information that the base station sends, obtain the CP length configuration of using the sub-district and specifically comprise:
After receiving the special subframe configuration information of described base station transmission, special subframe configuration index and the corresponding special subframe config option corresponding with described special subframe configuration information in the special subframe allocation list of inquiry storage judges whether the uplink CP length of described special subframe configuration information correspondence and descending CP length equate.
13., it is characterized in that the CP length configuration that use described sub-district comprises according to the described method of claim 10:
The CP length of ascending pilot frequency symbol and the CP equal in length of descending pilot frequency symbol;
The CP length of ascending pilot frequency symbol and the CP of descending pilot frequency symbol are uneven in length.
14., it is characterized in that described method further comprises according to the described method of claim 13:
By receiving the first independent indication information that the base station sends, know whether the CP length of data symbol and frequency pilot sign equates;
Perhaps, by receiving the second independent indication information that the base station sends, know the CP length of data symbol.
15., it is characterized in that the CP length configuration that use described sub-district comprises according to the described method of claim 10:
The CP length of up special subframe and the CP equal in length of descending sub frame;
The CP length of up special subframe and the CP of descending sub frame are uneven in length.
16., it is characterized in that described method further comprises according to the described method of claim 15:
By receiving the 3rd independent indication information that the base station sends, know whether the CP length of up special subframe and up common subframe equates;
Perhaps, when the CP of the common subframe of difference is uneven in length, send the 4th independent indication information, know the CP length of the up common subframe of described difference by receiving the base station.
17. a base station is characterized in that, comprising:
Dispensing unit is used for being provided with and the corresponding special subframe config option of CP length configuration at the special subframe allocation list, and the special subframe configuration index of described special subframe config option correspondence;
Transmitting element is used for by send the CP length configuration that special subframe configuration information indicating cell uses to UE; Described special subframe configuration information is represented the special subframe configuration index of the special subframe config option correspondence that use described sub-district.
18., it is characterized in that the CP length configuration that use described sub-district comprises according to the described base station of claim 17:
Uplink CP length and descending CP equal in length;
Perhaps, uplink CP length and descending CP are uneven in length;
Perhaps, the CP equal in length of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol;
Perhaps, the CP of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol is uneven in length;
Perhaps, the CP equal in length of the CP length of up special subframe and descending sub frame;
Perhaps, the CP length of up special subframe and the CP of descending sub frame are uneven in length.
19. according to the described base station of claim 18, it is characterized in that, further comprise following at least one unit:
First indicating member, be used for being configured to the CP length of ascending pilot frequency symbol and the CP equal in length of descending pilot frequency symbol when the CP length that use the described sub-district of described transmitting element indication, when perhaps the CP of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol is uneven in length, send the first independent indication information, the described first independent indication information comprises the indication whether the CP length of data symbol and frequency pilot sign is equated;
Second indicating member, be used for being configured to the CP length of ascending pilot frequency symbol and the CP equal in length of descending pilot frequency symbol when the CP length that use the described sub-district of described transmitting element indication, when perhaps the CP of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol is uneven in length, send the second independent indication information, the described second independent indication information comprises the indication to the CP length of data symbol;
The 3rd indicating member, be used for being configured to the CP length of up special subframe and the CP equal in length of descending sub frame when the CP length that use the described sub-district of described transmitting element indication, when perhaps the CP of the CP length of up special subframe and descending sub frame is uneven in length, send the 3rd independent indication information, the described the 3rd independent indication information comprises the indication whether the CP length of up special subframe and up common subframe is equated;
The 4th indicating member, be used for being configured to the CP length of up special subframe and the CP equal in length of descending sub frame when the CP length that use the described sub-district of described transmitting element indication, when perhaps the CP of the CP length of up special subframe and descending sub frame is uneven in length, send the 4th independent indication information, the described the 4th independent indication information comprises the indication to the CP length of the up common subframe of difference.
20. according to the described base station of claim 17, it is characterized in that, further comprise:
Memory cell is used for the special subframe allocation list that the stored configuration unit is provided with.
21. a subscriber equipment is characterized in that, comprising:
Dispensing unit is used for being provided with and the corresponding special subframe config option of CP length configuration at the special subframe allocation list, and the special subframe configuration index of above-mentioned special subframe config option correspondence;
Receiving element is used to receive the special subframe configuration information that the base station sends;
Acquiring unit is used for the special subframe configuration information according to the receiving element reception, obtains the CP length configuration of using the sub-district.
22., it is characterized in that the CP length configuration that use described sub-district comprises according to the described subscriber equipment of claim 21:
Uplink CP length and descending CP equal in length;
Perhaps, uplink CP length and descending CP are uneven in length;
Perhaps, the CP equal in length of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol;
Perhaps, the CP of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol is uneven in length;
Perhaps, the CP equal in length of the CP length of up special subframe and descending sub frame;
Perhaps, the CP length of up special subframe and the CP of descending sub frame are uneven in length.
23. according to the described subscriber equipment of claim 22, it is characterized in that, further comprise following at least one unit:
First obtains indicating member, be used for being configured to the CP length of ascending pilot frequency symbol and the CP equal in length of descending pilot frequency symbol when the CP length that use the described sub-district that described acquiring unit obtains, when perhaps the CP of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol is uneven in length, by receiving the first independent indication information that described base station sends, know whether the CP length of data symbol and frequency pilot sign equates;
Second obtains indicating member, be used for being configured to the CP length of ascending pilot frequency symbol and the CP equal in length of descending pilot frequency symbol when the CP length that use the described sub-district that described acquiring unit obtains, when perhaps the CP of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol is uneven in length, by receiving the second independent indication information that described base station sends, know the CP length of data symbol;
The 3rd obtains indicating member, be used for being configured to the CP length of up special subframe and the CP equal in length of descending sub frame when the CP length that use the described sub-district that described acquiring unit obtains, when perhaps the CP of the CP length of up special subframe and descending sub frame is uneven in length, by receiving the 3rd independent indication information that described base station sends, know whether the CP length of up special subframe and up common subframe equates;
The 4th obtains indicating member, be used for being configured to the CP length of up special subframe and the CP equal in length of descending sub frame when the CP length that use the described sub-district that described acquiring unit obtains, when perhaps the CP of the CP length of up special subframe and descending sub frame is uneven in length, by receiving the 4th independent indication information that described base station sends, know the CP length of different up common subframes.
24. according to the described subscriber equipment of claim 21, it is characterized in that, further comprise:
Memory cell is used for the special subframe allocation list that the stored configuration unit is provided with.
25. according to the described subscriber equipment of claim 21, it is characterized in that, further comprise:
Judging unit is used for according to the detected descending CP length of down-going synchronous, in conjunction with the special subframe configuration information that receiving element receives, judges uplink CP length.
26. the indication mechanism of a cyclic prefix CP length configuration comprises the base station, is used for communicating with subscriber equipment, it is characterized in that,
Described base station also is used for being provided with and the corresponding special subframe config option of CP length configuration at the special subframe allocation list, and the special subframe configuration index of above-mentioned special subframe config option correspondence; By send the CP length configuration that special subframe configuration information indication UE is current or neighbor cell uses to UE; This special subframe configuration information is represented the special subframe configuration index of the special subframe config option correspondence that use described sub-district.
27., it is characterized in that the CP length configuration that use described sub-district comprises according to the described system of claim 26:
Uplink CP length and descending CP equal in length;
Perhaps, uplink CP length and descending CP are uneven in length;
Perhaps, the CP equal in length of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol;
Perhaps, the CP of the CP length of ascending pilot frequency symbol and descending pilot frequency symbol is uneven in length;
Perhaps, the CP equal in length of the CP length of up special subframe and descending sub frame;
Perhaps, the CP length of up special subframe and the CP of descending sub frame are uneven in length.
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| CN2008101867920A CN101742698B (en) | 2008-11-10 | 2008-12-31 | Indication and acquisition method, device and system of CP length configuration |
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| CN2008101867920A CN101742698B (en) | 2008-11-10 | 2008-12-31 | Indication and acquisition method, device and system of CP length configuration |
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