CN101340697A - Feedback period of channel quality indication information and transmission method of sub-frame offset - Google Patents
Feedback period of channel quality indication information and transmission method of sub-frame offset Download PDFInfo
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Abstract
A transmission method for a channel quality instruction information cycle and a subframe offset is disclosed, which is applied to an LTE system for a long term evaluation. The method of the invention comprises the steps: channel quality instruction information, namely, all combinations of a CQI information feedback cycle and a CQI subframe offset in a system is determined; the corresponding relationship between the combination of the COI information feedback cycle and the CQI subframe offset and the index value are stored in a base station and a terminal; after configuring the COI information feedback cycle and the CQI subframe offset for the terminal, the base station finds the index value corresponding to the COI information feedback cycle and the CQI subframe offset according to the stored corresponding relationship, and then the index value is sent to the terminal. The method of the invention can save the expenses for transmitting signaling.
Description
Technical field
The present invention relates to the transmission method of the feedback of channel information parameter of wireless communication field, relate in particular to the transmission method of channel quality indication (CQI, Channel Quality Indicator) information feedback period (also abbreviating feedback cycle in the literary composition as) and CQI sub-frame offset (also abbreviating side-play amount in the literary composition as).
Background technology
Channel quality indication (CQI) information is the measurement standard of the communication quality of wireless channel.CQI is an indicated value (or a plurality of indicated value) of representing the measurement standard of a given channel communication quality.Usually, the CQI of a high numerical value represents that a channel has high quality standard, and vice versa.CQI to a channel can pass through some performance Index Calculation, for example, by signal to noise ratio, Signal to Interference plus Noise Ratio, signal and noise distortion ratio wait the performance Index Calculation of channel.These desired values at first can be measured by a given channel, is used to the CQI of calculating channel then.
The frame structure (being called the second class frame structure again, i.e. frame structure type2) of time division duplex (TDD, the TimeDivision Duplex) pattern of Long Term Evolution (LTE, Long Term Evolution) system as shown in Figure 1.In this frame structure, (307200Ts, radio frames 1ms=30720Ts) is divided into two fields to a 10ms, the long 5ms of each field (153600Ts).The subframe that it is 1ms that each field comprises 5 length.In the radio frames, the configuration of the uplink and downlink of each subframe is as shown in table 1, and wherein, D represents the descending sub frame of transmission of downlink signal; The sub-frame of uplink of U representative transmission upward signal.In addition, upstream or downstream subframe is divided into the time slot of 2 0.5ms again.S represents special subframe, comprises three special time slots, i.e. descending pilot frequency time slot (DwPTS, Downlink Pilot Time Slot), protection be (GP, Guard Period) and uplink pilot time slot (UpPTS, Uplink Pilot Time Slot) at interval.In real system, the uplink and downlink configuration index can be notified to mobile phone terminal by broadcast.
The uplink and downlink of subframe configuration in table 1 radio frames
The frame structure (being called first kind frame structure again, i.e. frame structure type 1) of the Frequency Division Duplexing (FDD) of LTE system (FDD, Frequency Division Duplex) pattern as shown in Figure 2.The radio frames of a 10ms is divided into the time slot of 20 0.5ms, and adjacent 2 time slots are formed the subframe that length is 1ms, and promptly subframe i is made up of time slot 2i and 2i+1, i=0 wherein, and 1 ..., 9.Under fdd mode, 10 subframes all are used for the transmission of upstream or downstream signal, distinguish by different frequency bands between the uplink and downlink.
In the LTE system, terminal can periodically be fed back CQI information to the base station, also can feed back to aperiodic.For periodic feedback, the base station need send to the targeted customer with the side-play amount of CQI information feedback period and CQI subframe, and wherein, the side-play amount of CQI subframe has represented to send in the feedback cycle position of the subframe of CQI information, can represent with the index of this subframe.At present, CQI information feedback period (N
P) can value be 2ms, 5ms, 10ms, 20ms, 40ms and off (closing), with respect to feedback cycle, CQI sub-frame offset (N
OFFSET) value be 0～(N
P-1), when feedback cycle was off, corresponding C QI side-play amount did not just exist yet.So, transmission CQI information feedback period needs 3 bits, the side-play amount of CQI subframe needs 6 bits at most, need 9 bits to represent altogether, this method for expressing exists the very big problem of signaling consumption, in addition, consider the different of FDD system and TDD system frame structure, the value of the side-play amount of the CQI subframe in the TID system is different.Therefore, need be to existing C QI information feedback period (N
P) and the side-play amount (N of CQI subframe
OFFSET) coding method improve, big and can not carry out the problem of different disposal to solve its signaling consumption at different system.
Summary of the invention
Technical problem to be solved by this invention provides the transmission method of a kind of feedback period of channel quality indication information and sub-frame offset, can save the signaling consumption of transmission.
In order to solve the problems of the technologies described above, the invention provides the transmission method of a kind of channel quality indication (CQI) information cycle and sub-frame offset, be applied to Long Term Evolution LTE system, this method comprises:
Determine that channel quality indication (CQI) information is all combinations of CQI information feedback period and CQI sub-frame offset in the system, for each combination distributes an index value, preserve CQI information feedback period and the combination of CQI sub-frame offset and the correspondence relationship information between the index value in base station and terminal;
After the base station is terminal configuration CQI information feedback period and CQI sub-frame offset, find the combination corresponding index value of this CQI information feedback period and CQI sub-frame offset, this index value is sent described terminal according to the described correspondence relationship information of preserving.
Further, above-mentioned transmission method also can have following characteristics:
After described terminal is received described index value, determine that according to the described correspondence relationship information of this index value and preservation the base station is the CQI information feedback period and the CQI sub-frame offset of its configuration.
Further, above-mentioned transmission method can adopt following first kind of scheme:
Described LTE system adopts the frame structure of TDD mode; The value of CQI information feedback period comprises 2ms, and this moment, the span of CQI sub-frame offset was 0,1,2, { the CQI information feedback period of formation, the CQI sub-frame offset } combination have 3, be respectively { 2, (0,1) }, { 2, (0,2) }, { 2, (1,2) }, comprise two CQI sub-frame offsets in every kind of combination; As with all subframes in the field from 0 open numbering, above-mentioned CQI sub-frame offset 0,1,2 corresponds respectively in the field and is numbered 2,3,4 subframe index.
Further, above-mentioned first kind of scheme also can have following characteristics:
The CQI information feedback period also comprises 5ms, 10ms, 20ms, 40ms, 80ms and 160ms;
When the CQI information feedback period was 5ms, CQI sub-frame offset span was 0～2,3 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 5,0}, 5,1}, 5,2};
When the CQI information feedback period was 10ms, CQI sub-frame offset span was 0～5,6 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 10,0}, 10,1}, 10,2}, 10,3}, 10,4}, 10,5};
When the CQI information feedback period was 20ms, CQI sub-frame offset span was 0～11,12 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 20,0}, 20,1}, 20,2} ..., 20,10}, 20,11};
When the CQI information feedback period was 40ms, CQI sub-frame offset span was 0～23,24 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 40,0}, 40,1}, 40,2} ..., 40,22}, 40,23}.
When the CQI information feedback period was 80ms, CQI sub-frame offset span was 0～47,48 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 80,0}, 80,1}, 80,2} ..., 80,46}, 80,47}.
When the CQI information feedback period was 160ms, CQI sub-frame offset span was 0～95,96 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 160,0}, 160,1}, 160,2} ..., 160,94}, 160,95};
When the CQI information feedback period is 5ms, as with all subframes in the field from 0 open numbering, CQI sub-frame offset 0,1,2 corresponds respectively in the field and is numbered 2,3,4 subframe index;
When CQI information feedback period during greater than 5ms, as being that 2,3,4 and 7,8,9 subframe renumbers successively since 0 to the original number in all radio frames in the CQI information feedback period, the CQI sub-frame offset has just been represented the subframe index after renumbeing.
Further, above-mentioned first kind of scheme also can have following characteristics:
When the CQI information feedback period was 2ms, 3 kinds of combinations of { CQI information feedback period, the CQI sub-frame offset } of formation i.e. { 2, (0,1) }, and { 2, (0,2) }, the index value of { 2, (1,2) } is followed successively by 0～2;
When the CQI information feedback period is 5ms, 3 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation combinations promptly 5,0}, 5,1}, { 5, the index value of 2} is followed successively by 3～5;
When the CQI information feedback period is 10ms, 6 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation combinations promptly 10,0}, 10,1}, 10,2}, 10,3}, 10,4}, { 10, the index value of 5} is followed successively by 6～11;
When the CQI information feedback period is 20ms, 12 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation combinations promptly 20,0}, 20,1}, 20,2} ..., 20,10}, { 20, the index value of 11} is followed successively by 12～23;
When the CQI information feedback period is 40ms, 24 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation combinations promptly 40,0}, 40,1}, 40,2} ..., 40,22}, { 40, the index value of 23} is followed successively by 24～47;
When the CQI information feedback period is 80ms, 48 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 80,0}, 80,1}, 80,2} ..., 80,46}, { 80, the index value of 47} is followed successively by 48～95;
When the CQI information feedback period is 160ms, 96 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 160,0}, 160,1}, 160,2} ..., 160,94}, { 160, the index value of 95} is followed successively by 96～191;
Described index value is represented with 8 bits or 9 bits.
Further, above-mentioned first kind of scheme also can have following characteristics:
The value of described CQI information feedback period also comprises OFF, and when the CQI information feedback period was OFF, the CQI sub-frame offset was a default value, and the combination of { CQI information feedback period, the CQI sub-frame offset } of the formation i.e. index value of { OFF, default value } is 192.
Further, above-mentioned transmission method also can adopt following second kind of scheme:
Described LTE system adopts the frame structure of TDD mode, and the value of CQI information feedback period comprises 1ms and 2ms;
When the CQI information feedback period was 1ms, CQI sub-frame offset span was 0, and { CQI information feedback period, CQI sub-frame offset } combination of formation has 1, and promptly { 1,0} requires terminal to carry out the feedback of CQI on each subframe at this moment;
When the CQI information feedback period was 2ms, CQI sub-frame offset span was 0,2, and { CQI information feedback period, CQI sub-frame offset } combination of formation has 1 i.e. { 2, (0,2) }, comprises two CQI sub-frame offsets in this combination; At this moment, as with all subframes in the field from 0 open numbering, CQI sub-frame offset 0,2 corresponds respectively in the field and is numbered 2,4 subframe index.
Further, above-mentioned second kind of scheme also can have following characteristics:
The CQI information feedback period also comprises 5ms, 10ms, 20ms and 40ms, 80ms, 160ms;
When the CQI information feedback period was 5ms, CQI sub-frame offset span was 0～2,3 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 5,0}, 5,1}, 5,2};
When the CQI information feedback period was 10ms, CQI sub-frame offset span was 0～5,6 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 10,0}, 10,1}, 10,2}, 10,3}, 10,4}, 10,5};
When the CQI information feedback period was 20ms, CQI sub-frame offset span was 0～11,12 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 20,0}, 20,1}, 20,2} ..., 20,10}, 20,11};
When the CQI information feedback period was 40ms, CQI sub-frame offset span was 0～23,24 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 40,0}, 40,1}, 40,2} ..., 40,22}, 40,23}.
When the CQI information feedback period was 80ms, CQI sub-frame offset span was 0～47,48 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 80,0}, 80,1}, 80,2} ..., 80,46}, 80,47}.
When the CQI information feedback period was 160ms, CQI sub-frame offset span was 0～95,96 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 160,0}, 160,1}, 160,2} ..., 160,94}, 160,95};
When the CQI information feedback period is 5ms, as with all subframes in the field from 0 open numbering, the CQI sub-frame offset 0,1,2 of CQI subframe corresponds respectively in the field and is numbered 2,3,4 subframe index;
When CQI information feedback period during greater than 5ms, as being that 2,3,4 and 7,8,9 subframe renumbers successively since 0 to the original number in all radio frames in the CQI information feedback period, the CQI sub-frame offset has just been represented the subframe index after renumbeing.
Further, above-mentioned second kind of scheme also can have following characteristics:
When the CQI information feedback period was 1ms, promptly { 1, the index value of 0} was 0 in a kind of combination of { CQI information feedback period, the CQI sub-frame offset } of formation;
When the CQI information feedback period was 2ms, a kind of { CQI information feedback period, the CQI sub-frame offset } of formation combination i.e. { 2, (0,2) }, index value be 1;
When the CQI information feedback period is 5ms, 3 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation combinations promptly 5,0}, 5,1}, { 5, the index value of 2} is followed successively by 2～4;
When the CQI information feedback period is 10ms, 6 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation combinations promptly 10,0}, 10,1}, 10,2}, 10,3}, 10,4}, { 10, the index value of 5} is followed successively by 5～10;
When the CQI information feedback period is 20ms, 12 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation combinations promptly 20,0}, 20,1}, 20,2} ..., 20,10}, { 20, the index value of 11} is followed successively by 11～22;
When the CQI information feedback period is 40ms, 24 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation combinations promptly 40,0}, 40,1}, 40,2} ..., 40,22}, { 40, the index value of 23} is followed successively by 23～46;
When the CQI information feedback period is 80ms, 48 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 80,0}, 80,1}, 80,2} ..., 80,46}, { 80, the index value of 47} is followed successively by 47～94;
When the CQI information feedback period is 160ms, 96 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 160,0}, 160,1}, 160,2} ..., 160,94}, { 160, the index value of 95} is followed successively by 95～190.
Described index value is represented with 8 bits or 9 bits.
Further, above-mentioned second kind of scheme also can have following characteristics:
The value of described CQI information feedback period also comprises OFF, and when the CQI information feedback period was OFF, the CQI sub-frame offset was a default value, and the combination of { CQI information feedback period, the CQI sub-frame offset } of the formation i.e. index value of { OFF, default value } is 191.
The present invention passes through the transmission to CQI feedback cycle and CQI sub-frame offset combination corresponding index value, and has saved the signaling consumption of transmission feedback cycle and side-play amount greatly, and has provided the different span of index value at the TDD system.
Description of drawings
Fig. 1 is the frame structure schematic diagram of LTE system TDD mode;
Fig. 2 is the flow chart of the transmission method of CQI information feedback period of the present invention and CQI sub-frame offset.
Embodiment
The transmission method flow process of CQI information feedback period provided by the invention and CQI sub-frame offset comprises the steps: as shown in Figure 2
Step 210: determine all combinations of CQI information feedback period and CQI sub-frame offset in the system, for each combination distributes an index value, preserve CQI information feedback period and the combination of CQI sub-frame offset and the correspondence relationship information between the index value in base station and terminal;
Step 220: after the base station is terminal configuration CQI information feedback period and CQI sub-frame offset, find the combination corresponding index value of this CQI information feedback period and CQI sub-frame offset, this index value is sent described terminal according to the correspondence relationship information of preserving;
Step 230: after terminal is received index value, determine that according to the correspondence relationship information of this index value and preservation the base station is the CQI information feedback period and the CQI sub-frame offset of its configuration.
For the ease of profound understanding the present invention,, provide some preferred embodiments of the transmission method that comprises CQI information feedback period of the present invention and CQI sub-frame offset below in conjunction with accompanying drawing.
First embodiment
For the TDD system,, determine that all combinations of CQI information feedback period and CQI sub-frame offset are as shown in table 2 according to the span of CQI information feedback period and CQI sub-frame offset.
All combinations of the table 2 TDD CQI of system information feedback period and CQI sub-frame offset
| Feedback cycle | Side-play amount | Feedback cycle-side-play amount combination |
| 2ms | 0、1、2 | {2，(0，1)}，{2，(0，2)}，{2，(1，2)}； |
| 5ms | 0、1、2 | {5，0}，{5，1}，{5，2}； |
| 10ms | 0～5 | {10，0}，{10，1}，{10，2}，{10，3}，{10，4}， {10，5}； |
| 20ms | 0～11 | {20，0}，{20，1}，{20，2}，{20，3}，{20，4}，{20， 5}，{20，6}，{20，7}，{20，8}，{20，9}，{20，10}， {20，11}； |
| 40ms | 0～23 | {40，0}，{40，1}，{40，2}，{40，3}，{40，4}，{40， 5}，{40，6}，{40，7}，{40，8}，{40，9}，{40，10}， |
| {40，11}，{40，12}，{40，13}，{40，14}，{40，15}， {40，16}，{40，17}，{40，18}，{40，19}，{40，20}， {40，21}，{40，22}，{40，23}； | ||
| 80ms | 0～47 | {80，0}，{80，1}，{80，2}，{80，3}，{80，4}，{80， 5}，{80，6}，{80，7}，{80，8}，{80，9}，{80，10}， {80，11}，{80，12}，{80，13}，{80，14}，{80，15}， {80，16}，{80，17}，{80，18}，{80，19}，{80，20}， {80，21}，{80，22}，{80，23}，{80，24}，{80，25}， {80，26}，{80，27}，{80，28}，{80，29}，{80，30}， {80，31}，{80，32}，{80，33}，{80，34}，{80，35}， {80，36}，{80，37}，{80，38}，{80，39}，{80，40}， {80，41}，{80，42}，{80，43}，{80，44}，{80，45}， {80，46}，{80，47}； |
| 160ms | 0～95 | {160，0}，{160，1}，{160，2}，{160，3}，{160，4}， {160，5}，{160，6}，{160，7}，{160，8}，{160，9}， {160，10}，{160，11}，{160，12}，{160，13}，{160， 14}，{160，15}，{160，16}，{160，17}，{160，18}， {160，19}，{160，20}，{160，21}，{160，22}，{160， 23}，{160，24}，{160，25}，{160，26}，{160，27}， {160，28}，{160，29}，{160，30}，{160，31}，{160， 32}，{160，33}，{160，34}，{160，35}，{160，36}， {160，37}，{160，38}，{160，39}，{160，40}，{160， 41}，{160，42}，{160，43}，{160，44}，{160，45}， {160，46}，{160，47}，{160，48}，{160，49}，{160， 50}，{160，51}，{160，52}，{160，53}，{160，54}， {160，55}，{160，56}，{160，57}，{160，58}，{160， 59}，{160，60}，{160，61}，{160，62}，{160，63}， {160，64}，{160，65}，{160，66}，{160，67}，{160， 68}，{160，69}，{160，70}，{160，71}，{160，72}， {160，73}，{160，74}，{160，75}，{160，76}，{160， 77}，{160，78}，{160，79}，{160，80}，{160，81}， {160，82}，{160，83}，{160，84}，{160，85}，{160， 86}，{160，87}，{160，88}，{160，89}，{160，90}， {160，91}，{160，92}，{160，93}，{160，94}，{160， 95}； |
| OFF | - | Default value- |
For the TDD system, when the CQI information feedback period is 2ms, need feed back the resource of CQI information in 2 sub-frame configuration of a field, so present embodiment disposes 2 side-play amounts in a kind of combination.
When the CQI information feedback period was 2ms and 5ms, as with all subframes in the field during from 0 open numbering, CQI sub-frame offset 0,1,2 corresponded respectively in the field and is numbered 2,3,4 subframe index.
When CQI information feedback period during greater than 5ms, as being that 2,3,4 and 7,8,9 subframe renumbers successively since 0 to the original number in all radio frames in the feedback cycle, the CQI sub-frame offset has just been represented the subframe index after renumbeing.
Under the TDD system, be each combination distribution one index value I of CQI information feedback period and CQI sub-frame offset
CQIIndex value I in base station and terminal preservation
CQIAnd the corresponding relation between the combination of CQI information feedback period and CQI sub-frame offset is as shown in table 3.
Table 3 index value I
CQIMapping relations with CQI information feedback period and CQI sub-frame offset
| The index value I of CQI CQI | CQI information feedback period (ms) | The CQI sub-frame offset |
| 0 | 2 | 0，1 |
| 1 | 2 | 0，2 |
| 2 | 2 | 1，2 |
| 3～5 | 5 | I CQI-3(0～2) |
| 6～11 | 10 | I CQI-6(0～5) |
| 12～23 | 20 | I CQI-12(0～11) |
| 24～47 | 40 | I CQI-24(0～23) |
| 48～95 | 80 | I CQI-48(0～47) |
| 96～191 | 160 | I CQI-96(0～95) |
| 192 | OFF | Default value- |
| 193～511 | Keep reserved | Keep reserved |
In the TDD system, the pairing index value span of the combination of CQI information feedback period and CQI sub-frame offset is 0～192, and the maximum of index value can make signaling consumption reduce to 9 bits or 8 bits less than N (N=256 or 512) thus.If this moment, feedback cycle needed 3 bits at least by original scheme, and side-play amount needs 7 bits at least, promptly needs 10 bits at least.
CQI information feedback period and CQI sub-frame offset information index value I will be contained in the base station
CQISend to the targeted customer, the user is by the index value I of CQI
CQIFind the corresponding CQI information feedback period and the combination of CQI sub-frame offset, obtain wherein CQI information feedback period value and CQI sub-frame offset.
That table 3 provides only is index value I under the TDD system
CQIA preferred embodiment corresponding with CQI information feedback period and CQI sub-frame offset.In fact multiple corresponded manner can be arranged, such as index value is that 0,1,2 o'clock CQI sub-frame offsets respectively corresponding in table 5 be (0,1), (0,2) and (1,2), can also distinguishes corresponding CQI sub-frame offset (0,2), (1,2) reaches (0,1).Perhaps, index value is 3,4,5 o'clock corresponding CQI sub-frame offsets 0,1,2 of difference in table 5, can also distinguish corresponding CQI sub-frame offset 1,0,2, or the like.
Second embodiment
In the present embodiment,,, determine that all combinations of CQI information feedback period and CQI sub-frame offset are as shown in table 4 according to the span of CQI information feedback period and CQI sub-frame offset for the TDD system.
All combinations of the table 4 TDD CQI of system information feedback period and the flat frame shifting amount of CQI
| Feedback cycle | Side-play amount | Feedback cycle-side-play amount combination |
| 1ms | 0 | {1，0}； |
| 2ms | 0，2 | {2，(0，2)}； |
| 5ms | 0、1、2 | {5，0}，{5，1}，{5，2}； |
| 10ms | 0～5 | {10，0}，{10，1}，{10，2}，{10，3}，{10，4}， {10，5}； |
| 20ms | 0～11 | {20，0}，{20，1}，{20，2}，{20，3}，{20，4}，{20， 5}，{20，6}，{20，7}，{20，8}，{20，9}，{20，10}， {20，11}； |
| 40ms | 0～23 | {40，0}，{40，1}，{40，2}，{40，3}，{40，4}，{40， 5}，{40，6}，{40，7}，{40，8}，{40，9}，{40，10}， {40，11}，{40，12}，{40，13}，{40，14}，{40，15}， {40，16}，{40，17}，{40，18}，{40，19}，{40，20}， {40，21}，{40，22}，{40，23}； |
| 80ms | 0～47 | {80，0}，{80，1}，{80，2}，{80，3}，{80，4}，{80， 5}，{80，6}，{80，7}，{80，8}，{80，9}，{80，10}， {80，11}，{80，12}，{80，13}，{80，14}，{80，15}， {80，16}，{80，17}，{80，18}，{80，19}，{80，20}， {80，21}，{80，22}，{80，23}，{80，24}，{80，25}， |
| {80，26}，{80，27}，{80，28}，{80，29}，{80，30}， {80，31}，{80，32}，{80，33}，{80，34}，{80，35}， {80，36}，{80，37}，{80，38}，{80，39}，{80，40}， {80，41}，{80，42}，{80，43}，{80，44}，{80，45}， {80，46}，{80，47}； | ||
| 160ms | 0～95 | {160，0}，{160，1}，{160，2}，{160，3}，{160，4}， {160，5}，{160，6}，{160，7}，{160，8}，{160，9}， {160，10}，{160，11}，{160，12}，{160，13}，{160， 14}，{160，15}，{160，16}，{160，17}，{160，18}， {160，19}，{160，20}，{160，21}，{160，22}，{160， 23}，{160，24}，{160，25}，{160，26}，{160，27}， {160，28}，{160，29}，{160，30}，{160，31}，{160， 32}，{160，33}，{160，34}，{160，35}，{160，36}， {160，37}，{160，38}，{160，39}，{160，40}，{160， 41}，{160，42}，{160，43}，{160，44}，{160，45}， {160，46}，{160，47}，{160，48}，{160，49}，{160， 50}，{160，51}，{160，52}，{160，53}，{160，54}， {160，55}，{160，56}，{160，57}，{160，58}，{160， 59}，{160，60}，{160，61}，{160，62}，{160，63}， {160，64}，{160，65}，{160，66}，{160，67}，{160， 68}，{160，69}，{160，70}，{160，71}，{160，72}， {160，73}，{160，74}，{160，75}，{160，76}，{160， 77}，{160，78}，{160，79}，{160，80}，{160，81}， {160，82}，{160，83}，{160，84}，{160，85}，{160， 86}，{160，87}，{160，88}，{160，89}，{160，90}， {160，91}，{160，92}，{160，93}，{160，94}，{160， 95}； |
| OFF | - | Default value- |
As can be seen from the above table, it is the value of 1ms that present embodiment has increased the CQI information feedback period, promptly requires terminal all to carry out the feedback of CQI on each subframe.
When the CQI information feedback period is 2ms, need feed back the resource of CQI information in 2 sub-frame configuration of a field, therefore disposed 2 side-play amounts in a kind of combination.First embodiment is provided with three kinds of combinations in the CQI information feedback period during for 2ms, and present embodiment is provided with a kind of combination when 2ms.
When the CQI information feedback period was 2ms and 5ms, as the subframe in the field is all renumberd since 0, CQI sub-frame offset 0,1,2 corresponded respectively in the field and is numbered 2,3,4 subframe index.
When CQI information feedback period during greater than 5ms, as being that 2,3,4 and 7,8,9 subframe renumbers successively since 0 to the original number in all radio frames in the feedback cycle, the CQI sub-frame offset has just been represented the subframe index after renumbeing;
Under the TDD system, be each combination distribution one index value I of CQI information feedback period and CQI sub-frame offset
CQIIndex value I in base station and terminal preservation
CQIAnd the corresponding relation between the combination of CQI information feedback period and CQI sub-frame offset is as shown in table 5.
Table 5, index value I
CQIMapping relations with CQI information feedback period and CQI sub-frame offset
| The index value I of CQI CQI | CQI feedback cycle (ms) | The CQI sub-frame offset |
| 0 | 1 | 0 |
| 1 | 2 | 0，2 |
| 2～4 | 5 | I CQI-2(0～2) |
| 5～10 | 10 | I CQI-5(0～5) |
| 11～22 | 20 | I CQI-11(0～11) |
| 23～46 | 40 | I CQI-23(0～23) |
| 47～94 | 80 | I CQI-47(0～47) |
| 95～190 | 160 | I CQI-95(0～95) |
| 191 | OFF | Default value- |
| 191～511 | Keep reserved | Keep reserved |
In the TDD system, the pairing index value of combination of CQI information feedback period and CQI sub-frame offset is following any one: 0～191, and the maximum of index value can make signaling consumption reduce to 9 bits or 8 bits less than N (N=256 or 512) thus.If this moment, the CQI information feedback period needed 3 bits at least by original scheme, and the CQI sub-frame offset needs 7 bits at least, promptly needs 10 bits at least.
In the TDD system, CQI information feedback period and CQI sub-frame offset information index value I will be contained in the base station
CQISend to the targeted customer, the user is by the index value I of CQI
CQIIndex in the combination of CQI information feedback period and CQI sub-frame offset in the corresponding relation, get access to corresponding CQI information feedback period value and CQI sub-frame offset.
That table 5 provides only is index value I under the TDD system
CQIA preferred embodiment corresponding with CQI information feedback period and CQI sub-frame offset.In fact multiple corresponded manner can be arranged, such as index value is 2,3,4 o'clock corresponding CQI sub-frame offsets 0,1,2 respectively in table 5, can also distinguishes corresponding CQI sub-frame offset 1,0,2, or the like.
The present invention is by the transmission to CQI information feedback period and CQI sub-frame offset combination corresponding index value, and saved the signaling consumption of transmission cycle and side-play amount greatly, and at FDD or the different system of TDD, provided the different span of index value respectively.
The above is embodiments of the 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 claim scope of the present invention.
Claims (10)
1, the transmission method of a kind of channel quality indication (CQI) information cycle and sub-frame offset is applied to Long Term Evolution LTE system, and this method comprises:
Determine that channel quality indication (CQI) information is all combinations of CQI information feedback period and CQI sub-frame offset in the system, for each combination distributes an index value, preserve CQI information feedback period and the combination of CQI sub-frame offset and the correspondence relationship information between the index value in base station and terminal;
After the base station is terminal configuration CQI information feedback period and CQI sub-frame offset, find the combination corresponding index value of this CQI information feedback period and CQI sub-frame offset, this index value is sent described terminal according to the described correspondence relationship information of preserving.
2, transmission method as claimed in claim 1 is characterized in that:
After described terminal is received described index value, determine that according to the described correspondence relationship information of this index value and preservation the base station is the CQI information feedback period and the CQI sub-frame offset of its configuration.
3, transmission method as claimed in claim 1 or 2 is characterized in that:
Described LTE system adopts the frame structure of TDD mode; The value of CQI information feedback period comprises 2ms, and this moment, the span of CQI sub-frame offset was 0,1,2, { the CQI information feedback period of formation, the CQI sub-frame offset } combination have 3, be respectively { 2, (0,1) }, { 2, (0,2) }, { 2, (1,2) }, comprise two CQI sub-frame offsets in every kind of combination; As with all subframes in the field from 0 open numbering, above-mentioned CQI sub-frame offset 0,1,2 corresponds respectively in the field and is numbered 2,3,4 subframe index.
4, transmission method as claimed in claim 3 is characterized in that:
The CQI information feedback period also comprises 5ms, 10ms, 20ms, 40ms, 80ms and 160ms;
When the CQI information feedback period was 5ms, CQI sub-frame offset span was 0～2,3 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 5,0}, 5,1}, 5,2};
When the CQI information feedback period was 10ms, CQI sub-frame offset span was 0～5,6 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 10,0}, 10,1}, 10,2}, 10,3}, 10,4}, 10,5};
When the CQI information feedback period was 20ms, CQI sub-frame offset span was 0～11,12 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 20,0}, 20,1}, 20,2} ..., 20,10}, 20,11};
When the CQI information feedback period was 40ms, CQI sub-frame offset span was 0～23,24 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 40,0}, 40,1}, 40,2} ..., 40,22}, 40,23}.
When the CQI information feedback period was 80ms, CQI sub-frame offset span was 0～47,48 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 80,0}, 80,1}, 80,2} ..., 80,46}, 80,47}.
When the CQI information feedback period was 160ms, CQI sub-frame offset span was 0～95,96 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 160,0}, 160,1}, 160,2} ..., 160,94}, 160,95};
When the CQI information feedback period is 5ms, as with all subframes in the field from 0 open numbering, CQI sub-frame offset 0,1,2 corresponds respectively in the field and is numbered 2,3,4 subframe index;
When CQI information feedback period during greater than 5ms, as being that 2,3,4 and 7,8,9 subframe renumbers successively since 0 to the original number in all radio frames in the CQI information feedback period, the CQI sub-frame offset has just been represented the subframe index after renumbeing.
5, transmission method as claimed in claim 4 is characterized in that:
When the CQI information feedback period was 2ms, 3 kinds of combinations of { CQI information feedback period, the CQI sub-frame offset } of formation i.e. { 2, (0,1) }, and { 2, (0,2) }, the index value of { 2, (1,2) } is followed successively by 0～2;
When the CQI information feedback period is 5ms, 3 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation combinations promptly 5,0}, 5,1}, { 5, the index value of 2} is followed successively by 3～5;
When the CQI information feedback period is 10ms, 6 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation combinations promptly 10,0}, 10,1}, 10,2}, 10,3}, 10,4}, { 10, the index value of 5} is followed successively by 6～11;
When the CQI information feedback period is 20ms, 12 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation combinations promptly 20,0}, 20,1}, 20,2} ..., 20,10}, { 20, the index value of 11} is followed successively by 12～23;
When the CQI information feedback period is 40ms, 24 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation combinations promptly 40,0}, 40,1}, 40,2} ..., 40,22}, { 40, the index value of 23} is followed successively by 24～47;
When the CQI information feedback period is 80ms, 48 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 80,0}, 80,1}, 80,2} ..., 80,46}, { 80, the index value of 47} is followed successively by 48～95;
When the CQI information feedback period is 160ms, 96 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 160,0}, 160,1}, 160,2} ..., 160,94}, { 160, the index value of 95} is followed successively by 96～191;
Described index value is represented with 8 bits or 9 bits.
6, transmission method as claimed in claim 5 is characterized in that:
The value of described CQI information feedback period also comprises OFF, and when the CQI information feedback period was OFF, the CQI sub-frame offset was a default value, and the combination of { CQI information feedback period, the CQI sub-frame offset } of the formation i.e. index value of { OFF, default value } is 192.
7, transmission method as claimed in claim 1 or 2 is characterized in that:
Described LTE system adopts the frame structure of TDD mode, and the value of CQI information feedback period comprises 1ms and 2ms;
When the CQI information feedback period was 1ms, CQI sub-frame offset span was 0, and { CQI information feedback period, CQI sub-frame offset } combination of formation has 1, and promptly { 1,0} requires terminal to carry out the feedback of CQI on each subframe at this moment;
When the CQI information feedback period was 2ms, CQI sub-frame offset span was 0,2, and { CQI information feedback period, CQI sub-frame offset } combination of formation has 1 i.e. { 2, (0,2) }, comprises two CQI sub-frame offsets in this combination; At this moment, as with all subframes in the field from 0 open numbering, CQI sub-frame offset 0,2 corresponds respectively in the field and is numbered 2,4 subframe index.
8, transmission method as claimed in claim 7 is characterized in that:
The CQI information feedback period also comprises 5ms, 10ms, 20ms and 40ms, 80ms, 160ms;
When the CQI information feedback period was 5ms, CQI sub-frame offset span was 0～2,3 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 5,0}, 5,1}, 5,2};
When the CQI information feedback period was 10ms, CQI sub-frame offset span was 0～5,6 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 10,0}, 10,1}, 10,2}, 10,3}, 10,4}, 10,5};
When the CQI information feedback period was 20ms, CQI sub-frame offset span was 0～11,12 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 20,0}, 20,1}, 20,2} ..., 20,10}, 20,11};
When the CQI information feedback period was 40ms, CQI sub-frame offset span was 0～23,24 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 40,0}, 40,1}, 40,2} ..., 40,22}, 40,23}.
When the CQI information feedback period was 80ms, CQI sub-frame offset span was 0～47,48 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 80,0}, 80,1}, 80,2} ..., 80,46}, 80,47}.
When the CQI information feedback period was 160ms, CQI sub-frame offset span was 0～95,96 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 160,0}, 160,1}, 160,2} ..., 160,94}, 160,95};
When the CQI information feedback period is 5ms, as with all subframes in the field from 0 open numbering, the CQI sub-frame offset 0,1,2 of CQI subframe corresponds respectively in the field and is numbered 2,3,4 subframe index;
When CQI information feedback period during greater than 5ms, as being that 2,3,4 and 7,8,9 subframe renumbers successively since 0 to the original number in all radio frames in the CQI information feedback period, the CQI sub-frame offset has just been represented the subframe index after renumbeing.
9, transmission method as claimed in claim 8 is characterized in that:
When the CQI information feedback period was 1ms, promptly { 1, the index value of 0} was 0 in a kind of combination of { CQI information feedback period, the CQI sub-frame offset } of formation;
When the CQI information feedback period was 2ms, a kind of { CQI information feedback period, the CQI sub-frame offset } of formation combination i.e. { 2, (0,2) }, index value be 1;
When the CQI information feedback period is 5ms, 3 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation combinations promptly 5,0}, 5,1}, { 5, the index value of 2} is followed successively by 2～4;
When the CQI information feedback period is 10ms, 6 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation combinations promptly 10,0}, 10,1}, 10,2}, 10,3}, 10,4}, { 10, the index value of 5} is followed successively by 5～10;
When the CQI information feedback period is 20ms, 12 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation combinations promptly 20,0}, 20,1}, 20,2} ..., 20,10}, { 20, the index value of 11} is followed successively by 11～22;
When the CQI information feedback period is 40ms, 24 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation combinations promptly 40,0}, 40,1}, 40,2} ..., 40,22}, { 40, the index value of 23} is followed successively by 23～46;
When the CQI information feedback period is 80ms, 48 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 80,0}, 80,1}, 80,2} ..., 80,46}, { 80, the index value of 47} is followed successively by 47～94;
When the CQI information feedback period is 160ms, 96 kinds of { CQI information feedback period, the CQI sub-frame offset } of formation be combined as 160,0}, 160,1}, 160,2} ..., 160,94}, { 160, the index value of 95} is followed successively by 95～190.
Described index 8 bits on weekly duty or 9 bits are represented.
10, transmission method as claimed in claim 9 is characterized in that:
The value of described CQI information feedback period also comprises OFF, and when the CQI information feedback period was OFF, the CQI sub-frame offset was a default value, and the combination of { CQI information feedback period, the CQI sub-frame offset } of the formation i.e. index value of { OFF, default value } is 191.
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