CN101924727A - Method for configuring frame structure indication information in wireless communication system - Google Patents
Method for configuring frame structure indication information in wireless communication system Download PDFInfo
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H—ELECTRICITY
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Abstract
The invention discloses a method for configuring frame structure indication information in a wireless communication system. In the method, the wireless communication system supports a frame structure of which a cyclic prefix is a 1/4 orthogonal frequency division multiplexing (OFDM) symbol and sets the indication information to indicate subframe configuration information in the frame structure. The indication information configuration of the frame structure with the 1/4 OFDM symbol is realized by the method.
Description
Technical field
The present invention relates to the communications field, particularly, relate to the method for configuring frame structure indication information in the wireless communication system.
Background technology
OFDM (Orthogonal Frequency Division Multiplexing, abbreviating OFDM as) technology is the high speed transmission technology under a kind of wireless environment, it realizes that principle is: the parallel data that high-speed serial data is transformed into the relative low speed of multichannel, and this multidiameter delay data-modulated transmitted, thereby can reduce the susceptibility of system to the multidiameter fading channel frequency selectivity to mutually orthogonal subcarrier.In the OFDM technology, by introducing Cyclic Prefix (Cyclic Prefix abbreviates CP as), the ability of the further anti-intersymbol interference of enhanced system (Inter-symbol Interference abbreviates ISI as).
(Orthogonal Frequency Division MultipleAccess, OFDMA) technology is on the basis of OFDM technology, realizes the technology that multiple access inserts by making the different subcarrier of CU in the OFDM access.In mobile communication system, terminal particularly, is mainly passed through synchronizing channel (the Synchronization Channel in the control channel by the control channel access network, abbreviate SCH as) and Broadcast Control Channel (BroadcastControl Channel abbreviates BCCH as) access network.Synchronizing channel and Broadcast Control Channel are the unidirectional control channels of " a bit to multiple spot ".The major function of synchronizing channel is frequency, the temporal correction when terminal provides initial the access, also carries a spot of system information simultaneously.The major function of Broadcast Control Channel is to necessary system configuration and the control information of terminal broadcasting, the control structure of whole system has been indicated in system configuration and control information, for example, at TDD (Time Division Duplex, time division duplex) under the mode, the configuring conditions such as ratio of descending sub frame and sub-frame of uplink.Thereby, only be correctly decoded synchronizing channel and Broadcast Control Channel in terminal, obtain after the necessary system configuration and control information, the ability access base station, and then carry out transfer of data.
The access step that mobile communication system is general comprises:
(1) time, Frequency Synchronization;
(2) cell ID (Cell ID) detects;
(3) broadcast reads.
Through above-mentioned steps, terminal begins follow-up access procedure according to the information in the broadcast.In wireless communication system, duplex mode comprises FDD mode (Frequency DivisionDuplex, Frequency Division Duplexing (FDD)) and TDD mode, respectively corresponding FDD frame structure and tdd frame structure.Frame structure is divided into the unit of different brackets with Radio Resource on time domain, for example, be divided into superframe (Super frame), frame (Frame), subframe (Subframe) and OFDMA symbol (Symbol).
For the tdd frame structure, the base station need be in broadcast channel the ratio or the relevant information of broadcast downstream subframe and sub-frame of uplink so that terminal obtains the information such as position of sub-frame of uplink position and ascending control channel.But, for the sub-district of supporting different channel conditions, different radii and different business transmission etc., same communication system need be supported the frame structure of multiple Short Length Cyclic Prefix, therefore, even for the same system that adopts the TDD duplex, also can there be the frame structure of multiple different Cyclic Prefix.
For example, the Cyclic Prefix that Fig. 1 shows the support of IEEE 802.16m system is the frame structure of 1/8 OFDMA symbol, as shown in Figure 1, Radio Resource is divided into the superframe of 20ms on time domain, each superframe comprises the frame of 4 5ms, and each frame comprises 8 subframes, subframe is made up of basic OFDMA symbol, TDD descending with uplink ratio be 5: 3 o'clock, the symbol quantity in 8 subframes is respectively 6,6,6,6,5,6,6,6.The Cyclic Prefix that Fig. 2 shows the support of IEEE 802.16m system is the frame structure of 1/16 OFDMA symbol, and as shown in Figure 2, Radio Resource is divided into the superframe of 20ms on time domain, each superframe comprises the frame of 4 5ms, and each frame comprises 8 subframes, and subframe is made up of basic OFDMA symbol, TDD descending with uplink ratio be 5: 3 o'clock, the symbol quantity in 8 subframes is respectively 6,7,6,6,6,6,6,7.The Cyclic Prefix that Fig. 3 to Fig. 5 shows the support of IEEE 802.16m system respectively is the frame structure of 1/4 OFDM symbol, and for example, as shown in Figure 3, each frame comprises 7 subframes.
Existing Cyclic Prefix is the descending sub frame in the frame structure of 1/8 and 1/16 OFDM symbol and the design of sub-frame of uplink ratio, and therefore, needing a kind of is the frame structure indication information allocation plan of 1/4 OFDM symbol at Cyclic Prefix.
Summary of the invention
Consider the needs that exist in the correlation technique a kind of be that the problem of the frame structure indication information allocation plan of 1/4 OFDM symbol proposes the present invention at Cyclic Prefix, for this reason, it is the method for configuring frame structure indication information of 1/4 OFDM symbol at Cyclic Prefix that the present invention aims to provide a kind of, and the mechanism of how coordinating mutually with the method for configuring frame structure indication information of 1/8 and 1/16 OFDM symbol is to fill up this technological gap of the prior art.
To achieve these goals, according to an aspect of the present invention, provide the method for configuring frame structure indication information in a kind of wireless communication system.
In said method, wireless communication system supports that Cyclic Prefix is the frame structure of 1/4 OFDM symbol, and the subframe configuration information in the indication information indication frame structure is set.
Preferably, subframe configuration information is one of following: the quantity u of the ratio p of descending sub frame and sub-frame of uplink, the quantity d of descending sub frame, sub-frame of uplink.
Preferably, p is selected from S set
1=7:0, and 6:1,5:2,4:3,3:4,2:5,1:6} perhaps is a retention.
Preferably, d is selected from S set
2={ 7,6,5,4,3,2} perhaps is a retention.
Preferably, u is selected from S set
3={ 0,1,2,3,4,5} perhaps is a retention.
Preferably, indication information takies m bit, m=2 or m=3.
Preferably, from each set, select one of at least element as p, d, u according to following factor: the bit number that indication information takies, system bandwidth, circulating prefix-length, the resource quantity that occupies of compatible 16e system, 16e system whether.
Preferably, the element selected from set of the bit number that takies according to indication information is not more than 2
mIndividual, wherein, indication information takies m bit.
Preferably, if the element number n that selects less than 2
m, then with 2
mThe subframe configuration information of the value correspondence of-n indication information is set to retention.
Preferably, said method also comprises: send subframe configuration information in Broadcast Control Channel.
To achieve these goals, in accordance with a further aspect of the present invention, also provide the method for configuring frame structure indication information in a kind of wireless communication system.
In said method, wireless communication system supports that Cyclic Prefix is the frame structure of n OFDM symbol, subframe configuration information in the indication information indication frame structure is set, wherein, n=1/8 or 1/16, subframe configuration information are one of following: the quantity u of the ratio p of descending sub frame and sub-frame of uplink, the quantity d of descending sub frame, sub-frame of uplink.
Preferably, p comprises one of following at least: 2:6,6:2.
Preferably, d is selected from S set
4=8,7,6,5,4,3,2}.
Preferably, u is selected from S set
5=0,1,2,3,4,5,6}.
To achieve these goals, in accordance with a further aspect of the present invention, provide the method for configuring frame structure indication information in a kind of wireless communication system.
In said method, wireless communication system is supported multiple frame structure with different circulating prefix-lengths, indication information is set indicates subframe configuration information in a plurality of frame structures, and wherein, circulating prefix-length is a n OFDM symbol, n take from 1/4,1/8,1/16}.
Preferably, subframe configuration information is one of following: the quantity u of the ratio p of descending sub frame and sub-frame of uplink, the quantity d of descending sub frame, sub-frame of uplink.
Preferably, p comprises p
1And/or p
2, wherein, p
1Corresponding to the descending sub frame of the frame structure of n=1/4Tb and the ratio of sub-frame of uplink, p
2Corresponding to the descending sub frame of the frame structure of n=1/8Tb and/or 1/16Tb and the ratio of sub-frame of uplink.
Preferably, p
1Be selected from S
1=7:0, and 6:1,5:2,4:3,3:4,2:5,1:6} perhaps is a retention; p
2Be selected from S
2=8:0, and 7:1,6:2,5:3,4:4,3:5,2:6,1:7} perhaps is a retention.
Preferably, d comprises d
1And/or d
2, wherein, d
1Corresponding to the descending sub frame quantity of the frame structure of n=1/4Tb, d
2Descending sub frame quantity corresponding to the frame structure of n=1/8Tb and/or 1/16Tb.
Preferably, d
1Be selected from S
3={ 7,6,5,4,3,2} perhaps is a retention; d
2Be selected from S
4={ 8,7,6,5,4,3,2} perhaps is a retention.
Preferably, u comprises u
1And/or u
2, wherein, u
1Corresponding to the sub-frame of uplink quantity of the frame structure of n=1/4Tb, u
2Sub-frame of uplink quantity corresponding to the frame structure of n=1/8Tb and/or 1/16Tb.
Preferably, u
1Be selected from S
5={ 0,1,2,3,4,5} perhaps is a retention; u
2Be selected from S
6={ 0,1,2,3,4,5,6} perhaps is a retention.
Preferably, indication information takies m bit, m=2 or 3.
Preferably, from each set, select one of at least element according to following factor: the bit number that indication information takies, system bandwidth, circulating prefix-length, the resource quantity that occupies of compatible 16e system, 16e system whether.
Preferably, the element selected from set of the bit number that takies according to indication information is not more than 2
mIndividual, wherein, indication information takies m bit.
Preferably, if the element number f that selects less than 2
m, then with 2
mThe subframe configuration information of the value correspondence of-f indication information is set to retention.
Preferably, said method also comprises: send subframe configuration information in Broadcast Control Channel.
Above-mentioned at least one technical scheme that provides by the embodiment of the invention, realized frame structure indication information configuration for 1/4 OFDM symbol, and can be in some cases, can realize with Cyclic Prefix being the compatibility of configuration of the frame structure of 1/8 and 1/16 OFDM symbol.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is according to correlation technique, and Cyclic Prefix is the frame structure schematic diagram of 1/8OFDM symbol;
Fig. 2 is according to correlation technique, and Cyclic Prefix is the frame structure schematic diagram of 1/16OFDM symbol;
Fig. 3-Fig. 5 is respectively according to correlation technique, and Cyclic Prefix is the frame structure schematic diagram of 1/4OFDM symbol.
Embodiment
Functional overview
As mentioned above, at present, communication system can adopt the Cyclic Prefix of different length, and the sub-frame number in the frame structure of different Cyclic Prefix is incomplete same, particularly, Cyclic Prefix is in the frame structure of 1/8 and 1/16 OFDM symbol 8 subframes to be arranged, and Cyclic Prefix is in the frame structure of 1/4 OFDM symbol 7 subframes to be arranged, and present frame structure configuration indicating method for 1/8 and 1/16 OFDM symbol is for the frame structure of 1/4 OFDM symbol and inapplicable.Based on this, the embodiment of the invention provides a kind of method for configuring frame structure indication information, be used for the indication information that the configuration cycles prefix is the frame structure of 1/4 OFDM symbol, further, some collocation methods of providing of the embodiment of the invention all are suitable for for the various frame structures with different Cyclic Prefix.
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described.If do not conflict, the feature among the embodiment of the invention and the embodiment can make up mutually.
Embodiment one: Cyclic Prefix is 1/4 OFDM symbol (abbreviating 1/4Tb as)
In this embodiment, it is the method for configuring frame structure indication information of 1/4 OFDM symbol that a kind of Cyclic Prefix is provided, Cyclic Prefix is that the frame structure of 1/4 OFDM symbol is referring to Fig. 3 to Fig. 5, based on this method, for (for example having different circulating prefix-lengths, 1/4OFDM symbol, 1/8OFDM symbol, 1/16OFDM symbol) each frame structure, use the subframe configuration information in the independent indication information indication frame structure respectively.The Cyclic Prefix that the embodiment of the invention provides is the method for configuring frame structure indication information of 1/4OFDM, and is preferably, suitable equally to the frame structure of the frame structure of 1/8OFDM and 1/16OFDM.
Particularly, in wireless communication system, the frame structure for wireless communication system is supported can be provided with indication information and be used to indicate subframe configuration information.Like this, when the subframe configuration information of frame structure with different Cyclic Prefix was indicated, the shared bit number of indication information can be identical, also can be different.For example, indication information can take 2 bits or 3 bits, certainly, according to the needs of implementing, also can take the bit of other numbers.
Preferably, above-mentioned subframe configuration information can be the ratio of ratio, sub-frame of uplink and the descending sub frame of descending sub frame and sub-frame of uplink in the frame structure, also can be the number of sub-frame of uplink or the number of descending sub frame.For example, selected descending sub frame can be taken from different set with the ratio of sub-frame of uplink during the configuration sub-frame information, and this set is determined according to circulating prefix-length.
Example one: indication information is represented with 2 bits
The indication information that takies 2bits can be represented 4 subframe configuration informations.
Following/sub-frame of uplink ratio p for the frame structure of 1/4Tb considers the setting of control channel, and the value set of actual capabilities is S
P_1/4={ 7:0,6:1,5:2,4:3,3:4,2:5,1:6}.The indication information that takies 2bits can be represented 4 kinds of different following/sub-frame of uplink ratios, and these 4 kinds different following/sub-frame of uplink ratios are taken from S set
P_1/4, be total to C
7 4=35 kinds of combinations.For example, table 1 shows a kind of corresponding relation of following/sub-frame of uplink ratio of the frame structure of binary bits value (indication information) and 1/4Tb.Other combination is enumerated no longer one by one.
Descending and the sub-frame of uplink ratio of the frame structure of table 1:1/4Tb
| Signaling(2bits) | DL∶UL?Ratio?for1/4Tb |
| 00 | 7∶0 |
| 01 | 5∶2 |
| 10 | 4∶3 |
| 11 | 3∶4 |
For the sub-frame of uplink number u of the frame structure of 1/4Tb, because the number of subframes in each frame is 7, and considers the setting of control channel, then the possible value set of the sub-frame of uplink number u of the frame structure of 1/4Tb is S
U_1/4=0,1,2,3,4,5}.The indication information that takies 2bits can be represented 4 kinds of different sub-frame of uplink numbers, and these 4 kinds different sub-frame of uplink numbers are taken from S set
U_1/4, be total to C
6 4=15 kinds of combinations.For example, table 2 shows a kind of corresponding relation of sub-frame of uplink number, descending sub frame and the sub-frame of uplink ratio of the frame structure of binary bits (indication information) value and 1/4Tb, and other combination is enumerated no longer one by one.
Sub-frame of uplink number or descending and sub-frame of uplink ratio during table 21/4Tb
| Signaling(2bits) | 1/4Tb?Num?ofUL | Subframe(DL∶UL) |
| 00 | 0 | 7∶0 |
| 01 | 2 | 5∶2 |
| 10 | 3 | 4∶3 |
| 11 | 4 | 3∶4 |
Example 2: indication information is represented with 3 bits
The indication information that takies 3bits can be represented 8 subframe configuration informations.
For the following/sub-frame of uplink ratio p of the frame structure of 1/4Tb, possible value set is S
P_1/4={ 7:0,6:1,5:2,4:3,3:4,2:5,1:6}.The indication information that takies 3bits can be represented 8 kinds of different following/sub-frame of uplink ratios, and these 8 kinds different following/sub-frame of uplink ratios are taken from S set
P_1/4, and in the set 7 kinds of ratios are only arranged, and therefore, can represent the whole circumstances of ratio, for the 8th kind of pairing subframe configuration information of value of indication information, can be set to keep the position, be also referred to as retention.For example, table 3 shows in the frame structure of binary bits value (indication information) and 1/4Tb down/a kind of corresponding relation of sub-frame of uplink ratio.Other combination is enumerated no longer one by one.
Descending and the sub-frame of uplink ratio of the frame structure of table 3:1/4Tb
| Signaling(3bits) | DL∶UL?Ratio?for1/4Tb |
| 000 | 7∶0 |
| 001 | 6∶1 |
| 010 | 5∶2 |
| 011 | 4∶3 |
| 100 | 3∶4 |
| 101 | 2∶5 |
| 110 | 1∶6 |
| 111 | Keep |
Perhaps, can represent 8 kinds of different following/sub-frame of uplink ratios, owing to some following/sub-frame of uplink ratio can not be used substantially, so can be from S although take the indication information of 3bits
P_1/4Gather following/sub-frame of uplink ratio of selecting frequent use and represent, such as, when often following/sub-frame of uplink ratio of using is planted as M (0＜M＜7), be total to C
7 MCombination.For example, table 4 show binary bits value (indication information) in the frame structure of 1/4Tb with down/a kind of corresponding relation of sub-frame of uplink ratio.Other combination is enumerated no longer one by one.
Descending and the sub-frame of uplink ratio of the frame structure of table 4:1/4Tb
| Signaling(3bits) | DL∶UL?Ratio?for1/4Tb |
| 000 | 7∶0 |
| 001 | 5∶2 |
| 010 | 4∶3 |
| 011 | 3∶4 |
| 100 | 2∶5 |
| 101 | Keep |
| 110 | Keep |
| 111 | Keep |
Adopting the descending sub frame number with subframe configuration information is example, and for the frame structure of 1/4Tb, the number of subframes in each frame is 7, and then the possible value set of the descending sub frame number d of the frame structure of 1/4Tb is S
D_1/4={ 7,6,5,4,3,2} in some cases, can also comprise element 1 in this set, repeats no more here.Can represent 8 kinds of different descending sub frame numbers with the indication information of 3bits, these 8 kinds different descending sub frame numbers are taken from S set
D_1/4, and in the set 6 kinds of descending sub frame numbers are only arranged, therefore, can represent the whole circumstances of number of subframes.Table 5 shows a kind of corresponding relation of descending sub frame number, descending sub frame and sub-frame of uplink ratio of the frame structure of binary bits value (indication information) and 1/4Tb, and other combination is enumerated no longer one by one.
The descending sub frame number or the descending and sub-frame of uplink ratio of the frame structure of table 51/4Tb
| Signaling(3bits) | 1/4Tb?Num?of?DL | Subframe(DL∶UL) |
| 000 | 7 | 7∶0 |
| 001 | 6 | 6∶1 |
| 010 | 5 | 5∶2 |
| 011 | 4 | 4∶3 |
| 100 | 3 | 3∶4 |
| 101 | 2 | 2∶5 |
| 110 | Reserved | Reserved |
| 111 | Reserved | Reserved |
Perhaps, although take the number that the indication information of 3bits can be represented 8 kinds of different descending sub frames, because the number of some descending sub frame can not be used substantially, so can be from S
D_1/4Gather the number of the descending sub frame of selecting frequent use and represent, such as, when often the number of the descending sub frame that uses is planted as M (0＜M＜6), be total to C
6 MCombination.For example, can remove in 2: 5 or 7: 0 in the table 5, form new configuration form, other combination is enumerated no longer one by one.
Embodiment two: Cyclic Prefix is 1/8 and 1/16 OFDM symbol (abbreviating 1/8Tb and 1/16Tb as)
Example three: indication information is represented with 2 bits
The indication information that takies 2bits can be represented 4 subframe configuration informations.
For the following/sub-frame of uplink ratio p of the frame structure of 1/8Tb and 1/16, possible value set is S
P_8/16={ 8:0,7:1,6:2,5:3,4:4,3:5,2:6,1:7}.The indication information that takies 2bits can be represented 4 kinds of different following/sub-frame of uplink ratios, and these 4 kinds different following/sub-frame of uplink ratios are taken from S set
8/16, be total to C
8 4=70 kinds of combinations.For example, table 6 shows in the frame structure of binary bits (indication information) value and 1/8Tb and 1/16Tb down/a kind of corresponding relation of sub-frame of uplink ratio.Other combination is enumerated no longer one by one.
Descending and the sub-frame of uplink ratio of the frame structure of table 6:1/8Tb and 1/16Tb
| Signaling(2bits) | DL∶UL?Ratio?for1/8/16Tb?DL∶UL |
| 00 | 6∶2 |
| 01 | 5∶3 |
| 10 | 4∶4 |
| 11 | 3∶5 |
For the sub-frame of uplink number of the frame structure of 1/8Tb and 1/16Tb, the number of subframes in each frame is 8, and considers the setting of control channel, and then the possible value set of the sub-frame of uplink number u of the frame structure of 1/8Tb and 1/16Tb is S
U_8/16=0,1,2,3,4,5,6}.Can represent 4 kinds of different sub-frame of uplink numbers with the indication information of 2bits, these 4 kinds different sub-frame of uplink numbers are taken from S set
U_8/16, be total to C
7 4=35 kinds of combinations.For example, table 7 shows a kind of corresponding relation of the ratio of binary bits (indication information) value of the frame structure of 1/8Tb and 1/16Tb and sub-frame of uplink number, descending sub frame and sub-frame of uplink, and other combination is enumerated no longer one by one.
Sub-frame of uplink number or descending and sub-frame of uplink ratio when table 71/8Tb and 1/16Tb
| Signaling(2bits) | 1/8/16Tb?Num?of?UL | Subframe(DL∶UL) |
| 00 | 0 | 8∶0 |
| 01 | 2 | 6∶2 |
| 10 | 3 | 5∶3 |
| 11 | 4 | 4∶4 |
Example four: indication information is represented with 3 bits
For the following/sub-frame of uplink ratio p of the frame structure of 1/8Tb and 1/16Tb, possible value set is S
P_8/16={ 8:0,7:1,6:2,5:3,4:4,3:5,2:6,1:7}.The indication information that takies 3bits can be represented 8 kinds of different following/sub-frame of uplink ratios, and these 8 kinds different following/sub-frame of uplink ratios are taken from S set
P_8/16, and in the set 8 kinds of ratios are only arranged, therefore, can represent the whole circumstances of ratio.For example, table 8 shows a kind of corresponding relation of following/sub-frame of uplink ratio of the frame structure of binary bits value (indication information) and 1/8Tb and 1/16Tb.Other combination is enumerated no longer one by one.
Descending and the sub-frame of uplink ratio of the frame structure of table 8:1/8Tb and 1/16Tb
| Signaling(3bits) | DL∶UL?Ratio?for1/8/16Tb?DL∶UL |
| 000 | 8∶0 |
| 001 | 7∶1 |
| 010 | 6∶2 |
| 011 | 5∶3 |
| 100 | 4∶4 |
| 101 | 3∶5 |
| 110 | 2∶6 |
| 111 | 1∶7 |
Perhaps, can represent 8 kinds of different following/sub-frame of uplink ratios, owing to some following/sub-frame of uplink ratio can not be used substantially, so can be from S although take the indication information of 3bits
P_8/16Gather following/sub-frame of uplink ratio of selecting frequent use and represent, such as, when often following/sub-frame of uplink ratio of using is planted as M (0＜M＜8), be total to C
8 MCombination.Table 9 and table 10 show a kind of corresponding relation of following/sub-frame of uplink ratio of the frame structure of binary bits (indication information) value and 1/8Tb and 1/16Tb.Other combination is enumerated no longer one by one.
Descending and the sub-frame of uplink ratio of the frame structure of table 9:1/8Tb and 1/16Tb
| Signaling(3bits) | DL∶UL?Ratio?for1/8/16Tb?DL∶UL |
| 000 | 8∶0 |
| 001 | 6∶2 |
| 010 | 5∶3 |
| 011 | 4∶4 |
| 100 | 3∶5 |
| 101 | Keep |
| 110 | Keep |
| 111 | Keep |
Descending and the sub-frame of uplink ratio of the frame structure of table 10:1/8Tb and 1/16Tb
| Signaling(3bits) | DL∶UL?Ratio?for1/8/16Tb?DL∶UL |
| 000 | 8∶0 |
| 001 | 6∶2 |
| 010 | 5∶3 |
| 011 | 4∶4 |
| 100 | 3∶5 |
| 101 | 2∶6 |
| 110 | Keep |
| 111 | Keep |
The frame structure of 1/8Tb and 1/16Tb, the number of subframes in each frame are 8, and then possible value set is S for the descending sub frame number d of the frame structure of 1/8Tb and 1/16Tb
D_8/16=8,7,6,5,4,3,2}.Can represent 8 kinds of different sub-frame of uplink numbers with the indication information of 3bits, these 8 kinds different sub-frame of uplink numbers are taken from S set
D_8/16, be total to C
7 7=a kind of combination.Table 11 shows a kind of corresponding relation of descending sub frame number, descending sub frame and the sub-frame of uplink ratio of the frame structure of binary bits value and 1/8Tb and 1/16Tb, and other combination is enumerated no longer one by one.
The sub-frame of uplink number or the descending and sub-frame of uplink ratio of the frame structure of table 11:1/8Tb and 1/16Tb
| Signaling(3bits) | 1/8/16Tb?Num?of?UL | Subframe(DL∶UL) |
| 000 | 8 | 8∶0 |
| 001 | 7 | 7∶1 |
| 010 | 6 | 6∶2 |
| 011 | 5 | 5∶3 |
| 100 | 4 | 4∶4 |
| 101 | 3 | 3∶5 |
| 110 | 2 | 2∶6 |
| 111 | Keep | Keep |
Perhaps, can represent 8 kinds of different following/sub-frame of uplink ratios, owing to some descending sub frame number d can not be used substantially, so can be from S although take the indication information of 3bits
D_8/16Gather the descending sub frame number d that selects frequent use and represent, such as, when often the descending sub frame number d that uses plants as M (0＜M＜7), be total to C
7 MCombination.For example, can remove in 2: 6 or 8: 0 in the table 11, form new configuration form.Other combination is enumerated no longer one by one.
Embodiment three
In this embodiment, (for example, 1/4OFDM symbol, 1/8OFDM symbol, 1/16OFDM symbol) each frame structure uses the subframe configuration information in the same indication information indication frame structure for having different circulating prefix-lengths.Indication information can take 2 bits or 3 bits, certainly, according to the needs of implementing, also can take the bit of other numbers.
Preferably, above-mentioned subframe configuration information can be descending sub frame and the ratio of sub-frame of uplink or the ratio of sub-frame of uplink and descending sub frame in the frame structure, also can be the number of sub-frame of uplink or the number of descending sub frame.
Example five: subframe configuration information is the ratio of descending sub frame and sub-frame of uplink
In this example, different CP length (1/4Tb, 1/8Tb and 1/16Tb OFDM symbol) at present/the sub-frame of uplink ratio adopts same form.
Following/sub-frame of uplink ratio p for the frame structure of 1/4Tb
1, possible value set is S
P1_1/4=7:0, and 6:1,5:2,4:3,3:4,2:5,1:6} is for the following/sub-frame of uplink ratio p of the frame structure of 1/8Tb and 1/16Tb
2, possible value set is S
P2_8/16={ 8:0,7:1,6:2,5:3,4:4,3:5,2:6,1:7}.Then the frame structure of 1/4Tb, 1/8Tb and 1/16Tb is following/sub-frame of uplink ratio p, and possible value set is S
4/8/16={ 7:0,6:1,5:2,4:3,3:4,2:5,1:6,8:0,7:1,6:2,5:3,4:4,3:5,2:6,1:7}.
(1) indication information is represented with 2 bits
Can represent that with the indication information of 2bits N (0＜N＜16) plants different following/sub-frame of uplink ratios, following/sub-frame of uplink ratio that this N kind is different is taken from S set
4/8/16, be total to C
15 NPlant combination.For example, table 12 and 13 shows a kind of corresponding relation of following/sub-frame of uplink ratio of the frame structure of binary bits value (indication information) and 1/4Tb, 1/8Tb and 1/16Tb, other combination is enumerated no longer one by one, wherein, each binary bits combination can corresponding one or more descending sub frames and sub-frame of uplink ratio.
Descending and the sub-frame of uplink ratio of the frame structure of table 12 1/4Tb, 1/8Tb and 1/16Tb
Descending and the sub-frame of uplink ratio of the frame structure of table 13 1/4Tb, 1/8Tb and 1/16Tb
For example, the 000 following/sub-frame of uplink ratio for the frame structure of 1/8Tb and 1/16Tb is 8: 0, is 7: 0 for the following/sub-frame of uplink ratio of the frame structure of 1/4Tb.
(2) indication information is represented with 3 bits
Represent that with the indication information of 3bits K (0＜K＜16) plants different following/sub-frame of uplink ratios, these 8 kinds different following/sub-frame of uplink ratios are taken from S set
4/8/16, be total to C
15 KPlant combination.For example, table 14 and 15 shows a kind of corresponding relation of following/sub-frame of uplink ratio of the frame structure of binary bits value and 1/4Tb, 1/8Tb and 1/16Tb, other combination is enumerated no longer one by one, wherein, and corresponding one or more descending sub frames of each binary bits value and sub-frame of uplink ratio.
Descending and the sub-frame of uplink ratio of the frame structure of table 14 1/4Tb, 1/8Tb and 1/16Tb
Descending and the sub-frame of uplink ratio of the frame structure of table 15 1/4Tb, 1/8Tb and 1/16Tb
Example six: subframe configuration information is the number of sub-frame of uplink or descending sub frame
For the frame structure of 1/4Tb, the number of subframes in each frame is 7, and then the possible value set of the sub-frame of uplink number of the frame structure of 1/4Tb is S
U_1/4=0,1,2,3,4,5}; For the frame structure of 1/8Tb and 1/16Tb, the number of subframes in each frame is 8, and then the possible value set of the sub-frame of uplink number of the frame structure of 1/8Tb and 1/16Tb is S
U_8/16=0,1,2,3,4,5,6}.Then the possible value set of the sub-frame of uplink number of the frame structure of 1/4Tb, 1/8Tb and 1/16Tb is S
U_4/8/16=0,1,2,3,4,5,6}.
(1) indication information is represented with 2 bits
Can represent 4 kinds of different sub-frame of uplink numbers with the indication information of 2bits, these 4 kinds different sub-frame of uplink numbers are taken from S set
U_4/8/16, be total to C
7 4=35 kinds of combinations.For example, table 16 and 17 shows a kind of corresponding relation of sub-frame of uplink number, descending sub frame and sub-frame of uplink ratio of the frame structure of binary bits value (indication information) and 1/4Tb, 1/8Tb and 1/16Tb, and other combination is enumerated no longer one by one.
Sub-frame of uplink number or descending and sub-frame of uplink ratio when table 16 1/4Tb, 1/8Tb and 1/16Tb
Descending number of subframes or descending and sub-frame of uplink ratio when table 17 1/4Tb, 1/8Tb and 1/16Tb
(2) indication information is represented with 3 bits
Can represent 8 kinds of different sub-frame of uplink numbers with the indication information of 3bits, these 8 kinds different sub-frame of uplink numbers are taken from S set
U_4/8/16, be total to C
7 7=a kind of combination.Shown in table 18.
The sub-frame of uplink number or the descending and sub-frame of uplink ratio of the frame structure of table 181/4Tb, 1/8Tb and 1/16Tb
In addition, can remove one or more and form new configuration based on table 18; Table 19 for example, other is no longer enumerated.
The sub-frame of uplink number of the frame structure of table 19 1/4Tb, 1/8Tb and 1/16Tb or descending and sub-frame of uplink ratio
Need to prove, in above-mentioned any one embodiment or example, when value is selected in the set of possible value, need to consider one of following factor or combination: the shared bit number of indication information, system bandwidth, circulating prefix-length, the resource quantity that occupies of compatible 16e system, 16e system whether.In addition, more than be to be that the ratio of descending sub frame and sub-frame of uplink is that example describes with p, be the situation of the ratio of sub-frame of uplink and descending sub frame for p, can understand with reference to the description of above ratio to descending sub frame and sub-frame of uplink.
Above-mentioned at least one technical scheme that provides by the embodiment of the invention, realized for Cyclic Prefix being the indication information configuration of the frame structure of 1/4OFDM symbol, promptly, the use indication information is indicated the subframe configuration information in the frame structure, except on being suitable for/the descending sub frame ratio represents the method for subframe configuration information, the embodiment of the invention also provides suitable uplink and downlink sub-frame number to represent the implementation method of subframe configuration information, and layoutprocedure is more flexible and convenient.In addition, the scheme of the embodiment one that the embodiment of the invention provides can compatible 1/4,1/8,1/16 system, and than the technical scheme of embodiment one, the scheme that embodiment three provides has realized the indication information configuration with littler signaling consumption.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of this invention.
Claims (27)
1. the method for configuring frame structure indication information in the wireless communication system is characterized in that, comprising:
Wireless communication system supports that Cyclic Prefix is the frame structure of 1/4 OFDM symbol, indication information is set indicates subframe configuration information in the described frame structure.
2. method according to claim 1 is characterized in that, described subframe configuration information is one of following: the quantity u of the ratio p of descending sub frame and sub-frame of uplink, the quantity d of descending sub frame, sub-frame of uplink.
3. method according to claim 2 is characterized in that p is selected from S set
1=7:0, and 6:1,5:2,4:3,3:4,2:5,1:6} perhaps is a retention.
4. method according to claim 2 is characterized in that d is selected from S set
2={ 7,6,5,4,3,2} perhaps is a retention.
5. method according to claim 2 is characterized in that u is selected from S set
3={ 0,1,2,3,4,5} perhaps is a retention.
6. according to each described method in the claim 1 to 5, it is characterized in that described indication information takies m bit, m=2 or m=3.
7. according to each described method in the claim 3 to 5, it is characterized in that, from each described set, select one of at least element as p, d, u: the bit number that indication information takies, system bandwidth, circulating prefix-length, the resource quantity that occupies of compatible 16e system, 16e system whether according to following factor.
8. method according to claim 7 is characterized in that, the element that the bit number that takies according to described indication information is selected from set is not more than 2
mIndividual, wherein, described indication information takies m bit.
9. method according to claim 8 is characterized in that, if the element number n that selects is less than 2
m, then with 2
mThe subframe configuration information of the value correspondence of-n indication information is set to described retention.
According in the claim 1 to 5 each, claim 8 or 9 described methods, it is characterized in that described method also comprises: send described subframe configuration information in Broadcast Control Channel.
11. the method for configuring frame structure indication information in the wireless communication system is characterized in that, comprising:
Wireless communication system supports that Cyclic Prefix is the frame structure of n OFDM symbol, indication information is set indicates subframe configuration information in the described frame structure, wherein, n=1/8 or 1/16, described subframe configuration information are one of following: the quantity u of the ratio p of descending sub frame and sub-frame of uplink, the quantity d of descending sub frame, sub-frame of uplink.
12. method according to claim 11 is characterized in that, it is one of following that p comprises at least: 2:6,6:2.
13. method according to claim 11 is characterized in that d is selected from S set
4=8,7,6,5,4,3,2}.
14. method according to claim 11 is characterized in that u is selected from S set
5=0,1,2,3,4,5,6}.
15. the method for configuring frame structure indication information in the wireless communication system is characterized in that, comprising:
Wireless communication system is supported multiple frame structure with different circulating prefix-lengths, indication information is set indicates subframe configuration information in described a plurality of frame structure, and wherein, circulating prefix-length is a n OFDM symbol, n take from 1/4,1/8,1/16}.
16. method according to claim 15 is characterized in that, described subframe configuration information is one of following: the quantity u of the ratio p of descending sub frame and sub-frame of uplink, the quantity d of descending sub frame, sub-frame of uplink.
17. method according to claim 16 is characterized in that p comprises p
1And/or p
2, wherein, p
1Corresponding to the descending sub frame of the frame structure of n=1/4Tb and the ratio of sub-frame of uplink, p
2Corresponding to the descending sub frame of the frame structure of n=1/8Tb and/or 1/16Tb and the ratio of sub-frame of uplink.
18. method according to claim 17 is characterized in that, p
1Be selected from S
1=7:0, and 6:1,5:2,4:3,3:4,2:5,1:6} perhaps is a retention; p
2Be selected from S
2=8:0, and 7:1,6:2,5:3,4:4,3:5,2:6,1:7} perhaps is a retention.
19. method according to claim 16 is characterized in that d comprises d
1And/or d
2, wherein, d
1Corresponding to the descending sub frame quantity of the frame structure of n=1/4Tb, d
2Descending sub frame quantity corresponding to the frame structure of n=1/8Tb and/or 1/16Tb.
20. method according to claim 19 is characterized in that, d
1Be selected from S
3={ 7,6,5,4,3,2} perhaps is a retention; d
2Be selected from S
4={ 8,7,6,5,4,3,2} perhaps is a retention.
21. method according to claim 16 is characterized in that u comprises u
1And/or u
2, wherein, u
1Corresponding to the sub-frame of uplink quantity of the frame structure of n=1/4Tb, u
2Sub-frame of uplink quantity corresponding to the frame structure of n=1/8Tb and/or 1/16Tb.
22. method according to claim 21 is characterized in that, u
1Be selected from S
5={ 0,1,2,3,4,5} perhaps is a retention; u
2Be selected from S
6={ 0,1,2,3,4,5,6} perhaps is a retention.
23., it is characterized in that described indication information takies m bit, m=2 or 3 according to each described method in the claim 15 to 22.
24. according to each described method in the claim 18,20,22, it is characterized in that, from each described set, select one of at least element: the bit number that indication information takies, system bandwidth, circulating prefix-length, the resource quantity that occupies of compatible 16e system, 16e system whether according to following factor.
25. method according to claim 24 is characterized in that, the element that the bit number that takies according to described indication information is selected from set is not more than 2
mIndividual, wherein, described indication information takies m bit.
26. method according to claim 25 is characterized in that, if the element number f that selects is less than 2
m, then with 2
mThe subframe configuration information of the value correspondence of-f indication information is set to described retention.
27. according in the claim 15 to 22 each, claim 25 or 26 described methods, it is characterized in that described method also comprises: send described subframe configuration information in Broadcast Control Channel.
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| PCT/CN2010/072948 WO2010145390A1 (en) | 2009-06-16 | 2010-05-19 | Method for configuring indication information for frame structure in radio communication system |
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