CN106034008A

CN106034008A - Value determination method and value determination device for precoding type indicator

Info

Publication number: CN106034008A
Application number: CN201510112759.3A
Authority: CN
Inventors: 白文岭
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2015-03-13
Filing date: 2015-03-13
Publication date: 2016-10-19
Anticipated expiration: 2035-03-13
Also published as: WO2016145918A1; CN106034008B

Abstract

The invention discloses a value determination method and a value determination device for a precoding type indictor. The value determination method comprises steps of determining a changing condition of a downlink channel, and determining a value of the precoding type indicator PTI which is reported this time according to a downlink channel changing condition. The invention provides a realization method and device which determine the PTI which is a feedback report type reported by a terminal so as to control the feedback reporting process.

Description

The value of a kind of precoding type instruction determines method and device

Technical field

The present invention relates to wireless communication technology field, the value particularly relating to the instruction of a kind of precoding type determines Method and device.

Background technology

Spatial reuse is multi-antenna transmission mode commonly used in wireless communication system.Such as, Long Term Evolution (Long Term Evolution, LTE) system physical DSCH Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH) transmission mode 4, transmission mode 9 broadly fall into spatial reuse with transmission mode 10 Multi-antenna transmission mode.

In order to improve transmission performance, receiver can feed back current channel condition information to transmitting terminal.Such as, In order to promote the transmission performance of LTE system PDSCH, terminal typically can be to base station feedback channel condition information (CSI, Channel State Information), including: channel quality instruction (Channel Quality Indicator, CQI), pre-coding matrix instruction (Precoding Matrix Indicator, PMI) refer to order Show RI (rank indication, RI).Wherein, CQI characterizes the quality information of channel, with the modulation recommended Coded system characterizes channel quality, and the more modulation coding mode of high-order represents that performance is the best；PMI characterizes letter The characteristic vector information i.e. pre-coding matrix in road；RI represents the number of plies of the spatial reuse that channel can support.

In LTE system, CSI feedback includes periodic feedback and non-periodic feedback.Wherein periodic feedback mainly carries Row controls on channel (Physical Uplink Control Channel, PUCCH) physically；And aperiodic Feedback is carried on Physical Uplink Shared Channel (Physical Uplink Shared Channel, PUSCH).

In LTE system, PUCCH periodic feedback is divided into four kinds of feedback kind, as shown in table 1 below:

Table 1PUCCH reports CQI Yu the PMI feedback kind of pattern

Wherein pattern (Mode) 2-1 needs to feed back broadband PMI and broadband CQI, further needs exist at two Broadband CQI reports the subband fed back successively in interval selected by each portions of bandwidth (Band Part, BP) Mark and subband CQI.

LTE system supports the descending multi-antenna transmission mode of 8 antennas in the standard of R10 and more highest version. For terminal feedback process, in 8 antenna transmission modes, define a PMI and two PMI of the 2nd PMI Indicate precoding matrix information, wherein a PMI represent broadband or long time channel attribute, second PMI represents and determines on frequency band or the attribute of channel in short-term.Enhancement mode Long Term Evolution (LTE-A) system In, due to a PMI and the feedback of the 2nd PMI in occurring in that, it is contemplated that expense limits, and introduces 1bit Precoding type instruction (PTI, Precoding Type Indicator), for base station notify terminal to report The type of feedback report.For pattern 2-1 in table 1, in 8 antenna transmission modes, as it is shown in figure 1, As PTI=0, corresponding first feedback report type, i.e. report a PMI (W1) and broadband CQI, with And broadband the 2nd PMI (W2)；As PTI=1, corresponding second feedback report type, i.e. report broadband CQI, Broadband the 2nd PMI (W2) and subband CQI, and subband the 2nd PMI (W2).

At present, LTE standard defines terminal when PTI value is known CSI feedback report report process, But do not provide the method that specifically determines of PTI value, i.e. there is presently no solution to determine terminal to report Feedback report type.

Summary of the invention

The value that it is an object of the invention to provide a kind of PTI determines method and device, to solve how to determine The problem of PTI value.

It is an object of the invention to be achieved through the following technical solutions:

The value of a kind of precoding type instruction determines method, including:

Determine down channel situation of change；

According to the described down channel situation of change determined, determine that this precoding type reported indicates PTI Value.

Determine that the first implementation of down channel situation of change is as follows:

Current downlink subframe determines broadband the first pre-coding matrix instruction PMI, it is judged that at current downlink Broadband the oneth PMI that described broadband the oneth PMI determined on frame and last time report is the most identical；

Accordingly, according to the described down channel situation of change determined, the value of this PTI reported is determined The first implementation as follows:

If described broadband the oneth PMI determined in current downlink subframe with on the broadband the that once reports One PMI is identical, it is determined that the value of this PTI reported is 1；Otherwise, it determines this PTI reported Value be 0.

Determine that the second implementation of down channel situation of change is as follows:

Current downlink subframe determines broadband the oneth PMI, it is judged that described in determining in current downlink subframe Broadband the oneth PMI that broadband the oneth PMI and last time report is the most identical, and judges the width of down channel Carry whether a PMI can change in current PTI report cycle；

Accordingly, according to the described down channel situation of change determined, the value of this PTI reported is determined The second implementation as follows:

If described broadband the oneth PMI determined in current downlink subframe with on the broadband the that once reports One PMI is identical, and broadband the oneth PMI of down channel will not become in current PTI report cycle Change, it is determined that the value of this PTI reported is 1；Otherwise, it determines the value of this PTI reported is 0。

Wherein, described in current downlink subframe, broadband the oneth PMI is determined, it is judged that in current downlink subframe Broadband the oneth PMI that described broadband the oneth PMI determined and last time report is the most identical, and under judgement Whether broadband the oneth PMI of row channel can change within the current PTI cycle, including:

Current downlink subframe determines broadband the oneth PMI；

Judge described broadband the oneth PMI determined in current downlink subframe with on the broadband the that once reports One PMI is the most identical；

If described broadband the oneth PMI determined in current downlink subframe with on the broadband the that once reports One PMI is identical, then judge that broadband the oneth PMI of down channel whether can in current PTI report cycle Change.

Determine that the third implementation of down channel situation of change is as follows:

Broadband the oneth PMI is determined, it is judged that the described width determined in current downlink subframe in current downlink subframe The most identical with last broadband the oneth PMI reported with a PMI, and judge the time-varying of down channel Characteristic；

Accordingly, according to the described down channel situation of change determined, the value of this PTI reported is determined The third implementation as follows:

If described broadband the oneth PMI that current downlink subframe determines with on the broadband first that once reports PMI is identical, and the time-varying characteristics of described down channel indicate the change of described down channel slow, it is determined that this The value of the PTI reported is 1；Otherwise, it determines the value of this PTI reported is 0.

Wherein, described broadband the oneth PMI is determined in current downlink subframe, it is judged that determine in current downlink subframe Described broadband the oneth PMI the most identical with broadband the oneth PMI that reports of last time, and judge descending letter The time-varying characteristics in road, including:

Broadband the oneth PMI is determined in current downlink subframe；

Judge described broadband the oneth PMI that current downlink subframe determines with on the broadband first that once reports PMI is the most identical；

If described broadband the oneth PMI that current downlink subframe determines with on the broadband first that once reports PMI is identical, then judge the time-varying characteristics of down channel.

Determine that the 4th kind of implementation of down channel situation of change is as follows:

Broadband the oneth PMI is determined, it is judged that in the described broadband that current downlink subframe determines in current downlink subframe Broadband the oneth PMI that oneth PMI and last time report is the most identical, it is judged that the broadband first of down channel Whether PMI can change within the current PTI cycle, and judged the time-varying characteristics of down channel；

Accordingly, according to the described down channel situation of change determined, the value of this PTI reported is determined The 4th kind of implementation as follows:

If described broadband the oneth PMI that current downlink subframe determines with on the broadband first that once reports PMI is identical, and broadband the oneth PMI of down channel will not change in current PTI report cycle, And the time-varying characteristics of described down channel indicate the change of described down channel slow, it is determined that this PTI reported Value be 1；Otherwise, it determines the value of this PTI reported is 0.

Wherein, described broadband the oneth PMI is determined in current downlink subframe, it is judged that determine in current downlink subframe Described broadband the oneth PMI the most identical with broadband the oneth PMI that reports of last time, it is judged that down channel Broadband the oneth PMI whether can change within the current PTI cycle, and judge that the time-varying of down channel is special Property, including:

Broadband the oneth PMI is determined in current downlink subframe；

If described broadband the oneth PMI that current downlink subframe determines with on the broadband first that once reports PMI is identical, then judge whether broadband the oneth PMI of down channel can occur in current PTI report cycle Change；

If the broadband of down channel the oneth PMI will not change in current PTI report cycle, then sentence The time-varying characteristics of disconnected down channel.

Determine that the 5th kind of implementation of down channel situation of change is as follows:

Current downlink subframe determines broadband the oneth PMI, it is judged that at the described width that current downlink subframe determines The most identical with last broadband the oneth PMI reported with a PMI, it is judged that the time-varying of down channel is special Property, and judge the frequency dependent characteristic of down channel；

Accordingly, according to the described down channel situation of change determined, the value of this PTI reported is determined The 5th kind of implementation as follows:

If described broadband the oneth PMI that current downlink subframe determines with on the broadband first that once reports PMI is identical, and the time-varying characteristics of described down channel indicate the change of described down channel slow and described descending The frequency dependent characteristic of channel indicates the frequency unevenness of described down channel, it is determined that this PTI reported takes Value is 1；Otherwise, it determines the value of this PTI reported is 0.

Wherein, described in current downlink subframe, broadband the oneth PMI is determined, it is judged that true in current downlink subframe Broadband the oneth PMI that fixed described broadband the oneth PMI and last time report is the most identical, it is judged that descending letter The time-varying characteristics in road, and judge the frequency dependent characteristic of down channel, including:

Current downlink subframe determines broadband the oneth PMI；

If described broadband the oneth PMI that current downlink subframe determines with on the broadband first that once reports PMI is identical, then judge the time-varying characteristics of down channel；

If the time-varying characteristics of described down channel indicate described down channel, change is slow, then judge down channel Frequency dependent characteristic.

Determine that the 6th kind of implementation of down channel situation of change is as follows:

Current downlink subframe determines broadband the oneth PMI, it is judged that at the described width that current downlink subframe determines The most identical with broadband the oneth PMI that reports of last time with a PMI, it is judged that the broadband of down channel the Whether one PMI can change within the current PTI cycle, it is judged that the time-varying characteristics of down channel, and judged The frequency dependent characteristic of down channel；

Accordingly, according to the described down channel situation of change determined, the value of this PTI reported is determined The 6th kind of implementation as follows:

If described broadband the oneth PMI that current downlink subframe determines with on the broadband first that once reports PMI is identical, and broadband the oneth PMI of down channel will not change in current PTI report cycle, And the time-varying characteristics of described down channel indicate the change of described down channel slow, and the frequency of described down channel becomes Characteristic indicates the frequency unevenness of described down channel, it is determined that the value of this PTI reported is 1；No Then, the value determining this PTI reported is 0.

Wherein, described in current downlink subframe, broadband the oneth PMI is determined, it is judged that true in current downlink subframe Broadband the oneth PMI that fixed described broadband the oneth PMI and last time report is the most identical, it is judged that descending letter Whether broadband the oneth PMI in road can change within the current PTI cycle, it is judged that the time-varying of down channel is special Property, and judge the frequency dependent characteristic of down channel, including:

Current downlink subframe determines broadband the oneth PMI；

If the broadband of down channel the oneth PMI will not change in current PTI report cycle, then sentence The time-varying characteristics of disconnected down channel；

Based on a determination that down channel situation of change above-mentioned second, the 4th, the 6th kind of implementation, described in sentence Whether broadband the oneth PMI of disconnected down channel can change in current PTI report cycle, including:

Obtain PTI report cycle；

Obtain the correlation time of broadband the oneth PMI of down channel；

By comparing the described correlation time of broadband the oneth PMI of down channel and described PTI report cycle, Judge whether broadband the oneth PMI of down channel can change in current PTI report cycle.

Wherein, the correlation time of broadband the oneth PMI of described acquisition down channel, including:

Determine broadband the oneth PMI time interval of the most adjacent twice change in M change of down channel, Described M is the integer more than 1；The meansigma methods of described time interval is defined as the broadband of down channel The described correlation time of one PMI；Or,

Determine broadband the oneth PMI time interval of the most adjacent twice change in M change of down channel, Described M is the integer more than 1；The smooth value of described time interval is defined as the broadband of down channel The described correlation time of one PMI；Or,

One group of broadband the oneth PMI with different time interval acquiring down channel；

Determine the degree of association of broadband the oneth PMI that down channel different time is spaced respectively；

Degree of association is defined as more than the maximum time interval of correlation threshold value the broadband first of down channel The described correlation time of PMI.

Based on a determination that the three, the four, the 5th of down channel situation of change, the 6th kind of implementation, described Judge the time-varying characteristics of down channel, including:

Determine the Doppler frequency shift of down channel；By by described Doppler frequency shift and Doppler frequency shift threshold value Compare, it is judged that the time-varying characteristics of down channel；Or,

Determine the broadband channel quality instruction CQI in current downlink subframe and with reference to the CQI in subframe, described Before being current downlink subframe with reference to subframe, with sub-frame interval the having the latest not less than N of current downlink subframe Effect descending sub frame；Absolute by the difference by the CQI in current downlink subframe with reference to the CQI in subframe Value compares with a CQI difference threshold, it is judged that the time-varying characteristics of down channel；Or,

Broadband the 2nd PMI/ broadband CQI obtaining down channel is report cycle when 1 in PTI value； Obtain the correlation time of broadband the 2nd PMI of down channel；Obtain the correlation time of broadband CQI；Pass through By call time on described respectively with the correlation time of broadband the 2nd PMI, the phase of broadband CQI of down channel The pass time compares, it is judged that the time-varying characteristics of down channel.

In the embodiment of the present invention, broadband the 2nd PMI and broadband CQI can also be expressed as broadband the 2nd PMI/ Broadband CQI, refers to, broadband the 2nd PMI simultaneously reported and broadband CQI.

Wherein, the correlation time of broadband the 2nd PMI of described acquisition down channel, including:

Determine that broadband the 2nd PMI of down channel is in the secondary change of M ' between the time of the most adjacent twice change Every, described M ' is the integer more than 1；The meansigma methods of described time interval is defined as the width of down channel Described correlation time with the 2nd PMI；Or,

Determine that broadband the 2nd PMI of down channel is in the secondary change of M ' between the time of the most adjacent twice change Every, described M ' is the integer more than 1；The smooth value of described time interval is defined as the width of down channel Described correlation time with the 2nd PMI.

Wherein, the correlation time of described acquisition broadband CQI, including:

Determine that the broadband CQI of down channel is at M " time interval of the most adjacent twice change, institute in secondary change State M " it is the integer more than 1；The meansigma methods of described time interval is defined as the broadband CQI of down channel Described correlation time；Or,

Determine that the broadband CQI of down channel is at M " time interval of the most adjacent twice change, institute in secondary change State M " it is the integer more than 1；The smooth value of described time interval is defined as the broadband CQI of down channel Described correlation time.

Based on a determination that the 5th of down channel situation of change the, the 6th kind of implementation, wherein, under described judgement The frequency dependent characteristic of row channel, including:

Determine the multi-path delay spread of down channel；By by the described multi-path delay spread of down channel with many Footpath delay spread threshold value compares, it is judged that the frequency dependent characteristic of down channel；Or,

Determine the maximum delay of down channel；By by the described maximum delay of down channel and maximum delay door Limit value compares, it is judged that the frequency dependent characteristic of down channel；Or,

Determine the broadband CQI and subband CQI of down channel respectively；By by the described broadband of down channel The absolute difference of CQI and subband CQI compares with the 2nd CQI difference threshold, it is judged that descending letter The frequency dependent characteristic in road.

The value of a kind of precoding type instruction determines method, including:

Whether the value of the precoding type instruction PTI reported for L time before judgement is 1, and L is for being more than In the integer of 1；

If it is, determine that the value of this PTI reported is 0；

Otherwise, it determines the value of this PTI reported is 1.

Based on the inventive concept as method, the embodiment of the present invention also provides for the instruction of a kind of precoding type Value determines device, including:

Channel situation determines module, is used for determining down channel situation of change；

PTI determines module, for according to the described down channel situation of change determined, determines what this reported The value of precoding type instruction PTI.

In a kind of implementation, described channel situation determine module for:

Described PTI determine module for:

In a kind of implementation, described channel situation determine module for:

Described PTI determine module for:

In a kind of implementation, described channel situation determine module for:

Described PTI determine module for:

In a kind of implementation, described channel situation determine module for:

Described PTI determine module for:

In a kind of implementation, described channel situation determine module for:

Described PTI determine module for:

In a kind of implementation, described channel situation determine module for:

Described PTI determine module for:

Wherein, it is judged that whether broadband the oneth PMI of down channel can become in current PTI report cycle During change, described channel situation determine module for:

Obtain PTI report cycle；

Obtain the correlation time of broadband the oneth PMI of down channel；

Wherein, when obtaining correlation time of broadband the oneth PMI of down channel, described channel situation determines mould Block is used for:

Wherein, it is judged that during the time-varying characteristics of down channel, described channel situation determine module for:

Obtain broadband the 2nd PMI and broadband CQI of down channel at the report cycle that PTI value is when 1； Obtain the correlation time of broadband the 2nd PMI of down channel；Obtain the correlation time of broadband CQI；Pass through By call time on described respectively with the correlation time of broadband the 2nd PMI, the phase of broadband CQI of down channel The pass time compares, it is judged that the time-varying characteristics of down channel.

Wherein, when obtaining correlation time of broadband the 2nd PMI of down channel, described channel situation determines mould Block is used for:

Wherein, obtain broadband CQI correlation time time, described channel situation determine module for:

Wherein, it is judged that during the frequency dependent characteristic of down channel, described channel situation determine module for:

Based on the inventive concept as method, the embodiment of the present invention also provides for a kind of terminal, including:

Processor, for reading the program in memorizer, performs following process:

Determine down channel situation of change；

According to the described down channel situation of change determined, determine that this precoding type reported indicates PTI Value, the value of described PTI indicates the type of channel state feedback report corresponding to described down channel；

Transceiver, for receiving under the control of a processor and sending data；

Memorizer, for preserving the data that processor is used when performing operation.

PTI history value judge module, the precoding type reported for L time before judging instruction PTI's Whether value is 1；

PTI determines module, is used for when the judged result of described PTI history value judge module is for being, really The value of this PTI reported fixed is 0；Judged result at described PTI history value judge module is no Time, determine that the value of this PTI reported is 1.

Processor, for reading the program in memorizer, performs following process:

If it is, determine that the value of this PTI reported is 0；Otherwise, it determines this PTI reported Value be 1；

Transceiver, for receiving under the control of a processor and sending data；

The technical scheme that the embodiment of the present invention provides, it is provided that determine PTI, i.e. the feedback report of terminal to report The implementation method of type and device, thus be used for controlling feedback and report process.

Accompanying drawing explanation

Fig. 1 be PUCCH report pattern 2-1 when 8 antenna port report schematic diagram；

First method flow diagram that Fig. 2 provides for the embodiment of the present invention；

Second method flow diagram that Fig. 3 provides for the embodiment of the present invention；

The 3rd method flow diagram that Fig. 4 provides for the embodiment of the present invention；

The 4th method flow diagram that Fig. 5 provides for the embodiment of the present invention；

The 5th method flow diagram that Fig. 6 provides for the embodiment of the present invention；

The 6th method flow diagram that Fig. 7 provides for the embodiment of the present invention；

The 7th method flow diagram that Fig. 8 provides for the embodiment of the present invention；

The 8th method flow diagram that Fig. 9 provides for the embodiment of the present invention；

A kind of device schematic diagram that Figure 10 provides for the embodiment of the present invention；

The terminal structure schematic diagram that Figure 11 provides for the embodiment of the present invention；

The another kind of device schematic diagram that Figure 12 provides for the embodiment of the present invention.

Detailed description of the invention

Below in conjunction with accompanying drawing, the technical scheme providing the embodiment of the present invention is described in detail.

The value of a kind of precoding type instruction that Fig. 2 show embodiment of the present invention offer determines the stream of method Cheng Tu, it at least includes operating as follows:

Step 200, determine down channel situation of change.

Step 210, according to the above-mentioned down channel situation of change determined, determine taking of this PTI reported Value.

Wherein, step 200 and step 210 both can perform when needs report PTI, it is also possible to upper one Secondary report PTI after, this performs before needing to report PTI.

The technical scheme that the embodiment of the present invention provides, it is provided that determine PTI, i.e. the feedback report of terminal to report The implementation method of type, thus be used for controlling feedback and report process.

Wherein, the down channel situation of change determined in step 200 at least includes following part or all of situation:

Whether broadband the oneth PMI of down channel changes, and whether broadband the oneth PMI of down channel Can change, the time-varying characteristics of down channel, the frequency dependent characteristic of down channel.

In the embodiment of the present invention, time-varying characteristics refer to the characteristic of the change speed of down channel；Frequency dependent characteristic is Refer to the frequency-flat whether characteristic of down channel.

Based on above-mentioned part or all of down channel situation of change, the specific implementation of the present invention is illustrated such as Under.

The first implementation of step 200: as it is shown on figure 3, step 300, in current downlink subframe Determine broadband the oneth PMI, step 310 judge broadband the oneth PMI that determines in current downlink subframe with on Broadband the oneth PMI once reported is the most identical；Accordingly, the first implementation of step 210: as Broadband the oneth PMI that determines in current downlink subframe of fruit with on broadband the oneth PMI that once reports identical, The value then perform step 320, determining this PTI reported is 1；Otherwise, perform step 330, determine The value of this PTI reported is 0.

If broadband the oneth PMI determined in current downlink subframe with on the broadband first that once reports PMI is identical, then this need not report broadband the oneth PMI, with reference to Fig. 1, determines this PTI reported Value be 1, otherwise, this needs to report broadband the oneth PMI, determines the value of this PTI reported It is 0.Visible, the PTI that the present embodiment provides determines that mode reasonably can be fed back according to practical situation, Thus improve feedback control performance.

Wherein, current downlink subframe can be report the last time PTI to this report between PTI any one Individual descending sub frame.Can according to agreement in advance or configuration, wherein any one.

Preferably, report, apart from this, the method performing the embodiment of the present invention on descending sub frame nearest for PTI Flow process.

The second implementation of step 200: determine broadband the oneth PMI in current downlink subframe, it is judged that Broadband the oneth PMI determined in current downlink subframe with on broadband the oneth PMI that once reports whether phase With, and judge whether broadband the oneth PMI of down channel can change in current PTI report cycle； Accordingly, the second implementation of step 210 is as follows: if the broadband determined in current downlink subframe Oneth PMI is identical with broadband the oneth PMI that the last time reports, and broadband the oneth PMI of down channel exists Will not change in current PTI report cycle, it is determined that the value of this PTI reported is 1；Otherwise, The value determining this PTI reported is 0.

If broadband the oneth PMI determined in current downlink subframe with on the broadband first that once reports PMI is identical, and broadband the oneth PMI of down channel will not change in current PTI report cycle, Then this need not report broadband the oneth PMI, with reference to Fig. 1, determines that the value of this PTI reported is 1, Otherwise, this needs to report broadband the oneth PMI, determines that the value of this PTI reported is 0.It is visible, The PTI that the present embodiment provides determines that mode reasonably can be fed back according to practical situation, thus improves anti- Feedback control performance.

In the present embodiment, the sequential of twice judgement is not defined.Both can first judge at current downlink Broadband the oneth PMI that broadband the oneth PMI determined on frame and last time report is the most identical, it is also possible to first Judge whether broadband the oneth PMI of down channel can change in current PTI report cycle.

If first judge broadband the oneth PMI determined in current downlink subframe with on the broadband that once reports Oneth PMI is the most identical, and the method flow that the embodiment of the present invention provides as shown in Figure 4, specifically includes as follows Operation:

Step 400, in current downlink subframe, determine broadband the oneth PMI.

Step 410, judge broadband the oneth PMI determined in current downlink subframe with on the width that once reports Carry a PMI the most identical, if identical, then perform step 420, otherwise, perform step 430.

Step 420, judge whether broadband the oneth PMI of down channel can send out in current PTI report cycle Changing, if meeting, then performs step 430, otherwise, performs step 440.

Step 430, the value determining PTI are 0.

Step 440, the value determining PTI are 1.

The third implementation of step 200: determine broadband the oneth PMI in current downlink subframe, it is judged that Broadband the oneth PMI that broadband the oneth PMI determined in current downlink subframe and last time report is the most identical, And judge the time-varying characteristics of down channel；Accordingly, the third implementation of step 210: if worked as Broadband the oneth PMI that broadband the oneth PMI that front descending sub frame determines reported with the last time is identical and descending The time-varying characteristics indicating downlink channel variation of channel is slow, it is determined that the value of this PTI reported is 1；No Then, the value determining this PTI reported is 0.

If broadband the oneth PMI determined in current downlink subframe with on the broadband first that once reports PMI is identical, and down channel change is slow, then this need not report broadband the oneth PMI, with reference to Fig. 1, The value determining this PTI reported is 1, and otherwise, this needs to report broadband the oneth PMI, determines this The value of the secondary PTI reported is 0.Visible, the PTI that the present embodiment provides determines that mode can be according to reality Situation is reasonably fed back, thus improves feedback control performance.

In the present embodiment, the sequential of twice judgement is not defined.Both can first judge at current downlink Broadband the oneth PMI that broadband the oneth PMI determined on frame and last time report is the most identical, it is also possible to first Judge the time-varying characteristics of down channel.

If first judge broadband the oneth PMI determined in current downlink subframe with on the broadband that once reports Oneth PMI is the most identical, and the method flow that the embodiment of the present invention provides is as it is shown in figure 5, specifically include as follows Operation:

Step 500, determine broadband the oneth PMI in current downlink subframe.

Step 510, judge broadband the oneth PMI that current downlink subframe determines with on the broadband that once reports Oneth PMI is the most identical, if identical, then perform step 520, otherwise, performs step 530.

Step 520, judge the time-varying characteristics of down channel, i.e. judge whether down channel changes soon, if The time-varying characteristics indicating downlink channel variation of down channel is fast, then perform step 530, if down channel Time-varying characteristics indicating downlink channel variation is slow, then perform step 540.

Step 530, the value determining PTI are 0.

Step 540, the value determining PTI are 1.

4th kind of implementation of step 200: determine broadband the oneth PMI in current downlink subframe, it is judged that Broadband the oneth PMI that broadband the oneth PMI that current downlink subframe determines and last time report is the most identical, Judge whether broadband the oneth PMI of down channel can change within the current PTI cycle, and judge descending The time-varying characteristics of channel；Accordingly, the 4th kind of implementation of step 210: if in current downlink subframe Broadband the oneth PMI determined is identical with broadband the oneth PMI that the last time reports, and the broadband of down channel Oneth PMI will not change in current PTI report cycle, and the time-varying characteristics of down channel indicate institute State down channel change slow, it is determined that the value of this PTI reported is 1；Otherwise, it determines this reports The value of PTI be 0.

If broadband the oneth PMI determined in current downlink subframe with on the broadband first that once reports PMI is identical, and broadband the oneth PMI of down channel will not change in current PTI report cycle, And down channel change is slow, then this need not report broadband the oneth PMI, with reference to Fig. 1, determines on this The value of the PTI of report is 1, and otherwise, this needs to report broadband the oneth PMI, determines this PTI reported Value be 0.Visible, the PTI that the present embodiment provides determines that mode can be carried out rationally according to practical situation Feedback, thus improve feedback control performance.

In the present embodiment, the sequential not judged three times is defined.If first judged in current downlink subframe On broadband the oneth PMI that reports of broadband the oneth PMI that determines and last time the most identical, under finally judging The time-varying characteristics of row channel, the method flow that the embodiment of the present invention provides as shown in Figure 6, specifically includes as follows Operation:

Step 600, determine broadband the oneth PMI in current downlink subframe.

Step 610, judge broadband the oneth PMI that current downlink subframe determines with on the broadband that once reports Oneth PMI is the most identical, if identical, then perform step 620, otherwise, performs step 640.

Step 620, judge whether broadband the oneth PMI of down channel can send out in current PTI report cycle Changing, if meeting, then performs step 640, otherwise, performs step 630.

Step 630, judge the time-varying characteristics of down channel, i.e. judge whether down channel changes soon, if The time-varying characteristics indicating downlink channel variation of down channel is fast, then perform step 640, if down channel Time-varying characteristics indicating downlink channel variation is slow, then perform step 650.

Step 640, the value determining PTI are 0.

Step 650, the value determining PTI are 1.

5th kind of implementation of step 200: determine broadband the oneth PMI in current downlink subframe, it is judged that Broadband the oneth PMI that current downlink subframe determines with on broadband the oneth PMI that once reports the most identical, Judge the time-varying characteristics of down channel, and judge the frequency dependent characteristic of down channel；Accordingly, step 210 5th kind of implementation is as follows: if described broadband the oneth PMI that current downlink subframe determines with on once Broadband the oneth PMI reported is identical, and the time-varying characteristics of down channel indicate the change of described down channel slow, And the frequency of the frequency dependent characteristic indicating downlink channel of down channel is uneven, it is determined that this PTI's reported Value is 1；Otherwise, it determines the value of this PTI reported is 0.

If broadband the oneth PMI determined in current downlink subframe with on the broadband first that once reports PMI is identical, and down channel change is slow, and the frequency-flat of down channel, then this need not report width Carry a PMI, with reference to Fig. 1, determine that the value of this PTI reported is 1, otherwise, on these needs Report broadband the oneth PMI, determines that the value of this PTI reported is 0.Visible, that the present embodiment provides PTI Determine that mode reasonably can be fed back according to practical situation, thus improve feedback control performance.

The sequential that three times are not judged by the present embodiment is defined.If first judging in current downlink subframe true Broadband the oneth PMI that fixed broadband the oneth PMI and last time report is the most identical, finally judges descending letter The frequency dependent characteristic in road, the method flow that the embodiment of the present invention provides is as it is shown in fig. 7, specifically include following operation:

Step 700, in current downlink subframe, determine broadband the oneth PMI.

Step 710, judge broadband the oneth PMI that current downlink subframe determines with on the broadband that once reports Oneth PMI is the most identical, if identical, then perform step 720, otherwise, performs step 740.

Step 720, judge the time-varying characteristics of down channel, i.e. judge whether down channel changes soon, if The time-varying characteristics indicating downlink channel variation of down channel is fast, then perform step 740, if down channel Time-varying characteristics indicating downlink channel variation is slow, then perform step 730.

Step 730, judge the frequency dependent characteristic of down channel, i.e. judge down channel whether frequency-flat, as The really frequency-flat of the frequency dependent characteristic indicating downlink channel of down channel, then perform step 740, if descending The frequency of the frequency dependent characteristic indicating downlink channel of channel is uneven, then perform step 750.

Step 740, the value determining PTI are 0.

Step 750, the value determining PTI are 1.

6th kind of implementation of step 200: determine broadband the oneth PMI in current downlink subframe, it is judged that Broadband the oneth PMI that current downlink subframe determines with on broadband the oneth PMI that once reports the most identical, Judge whether broadband the oneth PMI of down channel can change within the current PTI cycle, it is judged that descending letter The time-varying characteristics in road, and judge the frequency dependent characteristic of down channel；Accordingly, the 6th kind of realization of step 210 Mode is as follows: if broadband the oneth PMI that current downlink subframe determines with on the broadband first that once reports PMI is identical, and broadband the oneth PMI of down channel will not change in current PTI report cycle, And the time-varying characteristics indicating downlink channel variation of down channel is slow, and the frequency dependent characteristic indicating downlink of down channel The frequency of channel is uneven, it is determined that the value of this PTI reported is 1；Otherwise, it determines this reports The value of PTI be 0.

If broadband the oneth PMI determined in current downlink subframe with on the broadband first that once reports PMI is identical, and broadband the oneth PMI of down channel will not change in current PTI report cycle, Down channel change is slow, and the frequency-flat of down channel, then this need not report broadband the oneth PMI, With reference to Fig. 1, determining that the value of this PTI reported is 1, otherwise, this needs to report broadband the oneth PMI, The value determining this PTI reported is 0.Visible, the PTI that the present embodiment provides determines that mode can root Reasonably feed back according to practical situation, thus improve feedback control performance.

The sequential that four times are not judged by the present embodiment is defined.If first judging in current downlink subframe true Broadband the oneth PMI that fixed broadband the oneth PMI and last time report is the most identical, then judges down channel Broadband the oneth PMI whether can change in current PTI report cycle, finally judge down channel Frequency dependent characteristic, the method flow that the embodiment of the present invention provides as shown in Figure 8, specifically includes and operates as follows:

Step 800, in current downlink subframe, determine broadband the oneth PMI.

Step 810, judge broadband the oneth PMI that current downlink subframe determines with on the broadband that once reports Oneth PMI is the most identical, if identical, then perform step 820, otherwise, performs step 850.

Step 820, judge whether broadband the oneth PMI of down channel can send out in current PTI report cycle Changing, if constant, then perform step 850, otherwise, performs step 830.

Step 830, judge the time-varying characteristics of down channel, i.e. judge whether down channel changes soon, if The time-varying characteristics indicating downlink channel variation of down channel is fast, then perform step 850, if down channel Time-varying characteristics indicating downlink channel variation is slow, then perform step 840.

Step 840, judge the frequency dependent characteristic of down channel, i.e. judge down channel whether frequency-flat, as The really frequency-flat of the frequency dependent characteristic indicating downlink channel of down channel, then perform step 850, if descending The frequency of the frequency dependent characteristic indicating downlink channel of channel is uneven, then perform step 860.

Step 850, the value determining PTI are 0.

Step 860, the value determining PTI are 1.

Based on a determination that down channel situation of change above-mentioned second, the 4th, the 6th kind of implementation, wherein, Judge whether broadband the oneth PMI of down channel can change in current PTI report cycle, specifically wrap Include and operate as follows:

Step one, acquisition PTI report cycle T₁。

Can but be not limited only to the feedback parameter by base station configures and directly obtain, specific implementation can be joined 7.2 joints according to 3GPP TS 36.213-B40 describe.

Step 2, obtain T correlation time of broadband the oneth PMI of down channel₂。

The value being defined as this parameter the correlation time of certain parameter ensures the time interval of certain degree of association.In phase In the time of pass, there is between the value of parameter the biggest degree of association.

The implementation of step 2 has multiple.The present invention enumerates the most several:

Implementation A, determine broadband the oneth PMI of down channel the most adjacent twice change in M change The time interval changed；The meansigma methods of these time intervals is defined as the phase of broadband the oneth PMI of down channel The pass time.That is:

T_{2} = \frac{1}{M} Σ_{m = 1}^{M} P_{m}

Wherein, M is the positive integer more than 1, P_mChange and the m-1 time for the m time in M change The time interval of change.

Wherein, the concrete value of M determines according to actual needs, and the present invention is not construed as limiting.

Implementation B, determine broadband the oneth PMI of down channel the most adjacent twice change in M change The time interval changed；The smooth value of these time intervals is defined as the phase of broadband the oneth PMI of down channel The pass time.Such as can be represented by equation below:

T₂(m)=(1-α) * T₂(m-1)+α*P_m

T₂(0)=0

T₂=T₂(M)

Wherein, M is the positive integer more than 1, P_mChange and the m-1 time for the m time in M change The time interval of change, α is smoothing factor, and value is the real number in the range of [0,1].

Implementation C, with one group of broadband the oneth PMI of different time interval acquiring down channel；The most really Determine the degree of association of broadband the oneth PMI at down channel different time interval；By degree of association more than correlation threshold The maximum time interval of value is defined as the correlation time of broadband the oneth PMI of down channel.

Concrete, it is assumed that represented by broadband the oneth PMI that t (unit of t can be subframe) reports Broadband the first pre-coding matrix be W (t), then, the broadband first of down channel different time interval τ The computing formula of the degree of association R (τ) of PMI is as follows:

R (τ) = \frac{1}{T} Σ_{t = 1}^{T} \frac{< W (t), W (t + τ) >}{\sqrt{< W (t), W (t) > \times < W (t + τ), W (t + τ) >}}

Wherein,<W (t), W (t+ τ)>represents the inner product of vector W (t) and W (t+ τ), and T is the positive integer more than 1.

The correlation time of broadband the oneth PMI of down channel is the R (τ) maximum more than correlation threshold value τ。

In the embodiment of the present invention, the value of correlation threshold value is the real number in the range of [0,1], it is recommended that value is 0.9,0.95,0.99 etc..

Step 3, by comparing T correlation time of broadband the oneth PMI of down channel₂Week is reported with PTI Phase T₁, it is judged that whether broadband the oneth PMI of down channel can change in current PTI report cycle.

Concrete, work as T₁＞ T₂, it is judged that broadband the oneth PMI of down channel is at current PTI report cycle Interior meeting changes, otherwise, it is judged that broadband the oneth PMI of down channel in current PTI report cycle not Can change.It is of course also possible to be at T_1≥T₂, it is judged that broadband the oneth PMI of down channel is currently Can change in PTI report cycle, otherwise, it is judged that broadband the oneth PMI of down channel is at current PTI Will not change in report cycle.

Based on a determination that the three, the four, the 5th of down channel situation of change, the 6th kind of implementation, wherein, Judge that the implementation of the time-varying characteristics of down channel has multiple.The present invention enumerates the most several:

Implementation D, determine the Doppler frequency shift of down channel；By by this Doppler frequency shift and Doppler Frequency displacement threshold value compares, it is judged that the time-varying characteristics of down channel.

Concrete, if Doppler frequency shift is more than more than Doppler frequency shift threshold value, it is determined that down channel changes Hurry up；Otherwise, it is determined that down channel change is slow.It is of course also possible to Doppler frequency shift not less than (more than or Be equal to) Doppler frequency shift threshold value time, it is determined that down channel change is fast, otherwise, it is determined that down channel change Slowly.

Wherein, Doppler frequency shift threshold value is the real number more than 0, and its concrete value can be according to actual needs Setting, this is not construed as limiting by the present invention.

CQI in implementation E, the broadband CQI determined in current downlink subframe and reference subframe；Pass through By absolute difference and a CQI difference of the CQI on the CQI in current downlink subframe and reference subframe Threshold value compares, it is judged that the time-varying characteristics of down channel.

Concrete, if the CQI in current downlink subframe and the absolute difference with reference to the CQI in subframe More than a CQI difference threshold, it is determined that the change of down channel is fast, otherwise, it is determined that the change of down channel Change slow.It is of course also possible to be the CQI in current downlink subframe and exhausted with reference to the difference of the CQI in subframe To value not less than a CQI difference threshold, it is determined that the change of down channel is fast, otherwise, it is determined that descending letter The change in road is slow.

Wherein, before being current downlink subframe with reference to subframe, it is not less than with the sub-frame interval of current downlink subframe Effective the latest descending sub frame of N.

Wherein, the definition of effective descending sub frame refers to 7.2 joints of 3GPP TS 36213-b10 and describes, this Place repeats no more.

Wherein, a CQI difference threshold is the positive integer more than 0, and its concrete value can be according to reality Needing to set, this is not construed as limiting by the present invention.

Implementation F, broadband the 2nd PMI and broadband CQI of acquisition down channel are 1 in PTI value Time report cycle T₃；Obtain T correlation time of broadband the 2nd PMI of down channel₄；Obtain broadband CQI T correlation time₅；By by the T that calls time on above-mentioned₃Respectively with the phase of broadband the 2nd PMI of down channel Pass time T₄, T correlation time of broadband CQI₅Compare, it is judged that the time-varying characteristics of down channel.

Concrete, if T₃>T₄, or T₃>T₅, it is determined that the change of down channel is fast, otherwise, it is determined that The change of down channel is slow.

Wherein it is possible to the feedback parameter configured by base station directly obtains T₃, specific implementation is referred to The description of 7.2 joints of 3GPP TS 36.214-b40, here is omitted.

Wherein, the implementation of the correlation time obtaining broadband the 2nd PMI of down channel has multiple, below Enumerate the most several:

Implementation G, determine broadband the 2nd PMI the most adjacent twice change in the secondary change of M ' of down channel The time interval changed, M ' is the integer more than 1；The meansigma methods of these time intervals is defined as down channel Correlation time of broadband the 2nd PMI.

Its specific implementation is referred to above-mentioned implementation A, and here is omitted.

Implementation H, determine broadband the 2nd PMI of down channel in the secondary change of M ' the most adjacent twice The time interval of change, M ' is the integer more than 1；The smooth value of these time intervals is defined as descending The correlation time of broadband the 2nd PMI of channel.

Its specific implementation is referred to above-mentioned implementation B, and here is omitted.

Wherein, the implementation of the correlation time obtaining broadband CQI has multiple, enumerates the most several below:

Implementation I, determine that the broadband CQI of down channel is at M " the most adjacent twice change in secondary change Time interval, M " it is the integer more than 1；The meansigma methods of these time intervals is defined as down channel The correlation time of broadband CQI.

Implementation J, determine that the broadband CQI of down channel is at M " the most adjacent twice change in secondary change Time interval, M " it is the integer more than 1；The smooth value of these time intervals is defined as down channel The correlation time of broadband CQI.

Based on a determination that the 5th of down channel situation of change the, the 6th kind of implementation, wherein, it is judged that descending letter The implementation of the frequency dependent characteristic in road has multiple, and the present invention enumerates the most several:

Implementation K, determine the multi-path delay spread of down channel；By by the multidiameter delay of down channel Extension compares with multi-path delay spread threshold value, it is judged that the frequency dependent characteristic of down channel.

Concrete, if the multi-path delay spread of down channel is more than multi-path delay spread threshold value, it is determined that under The frequency of row channel is uneven, otherwise, it is determined that the frequency-flat of down channel.

Implementation L: determine the maximum delay of down channel；By by the maximum delay of down channel with Long time delay threshold value compares, it is judged that the frequency dependent characteristic of down channel.

Concrete, if the maximum delay of down channel is more than maximum delay threshold value, it is determined that down channel Frequency is uneven, otherwise, it is determined that the frequency-flat of down channel.

Implementation Q: determine the broadband CQI and subband CQI of down channel respectively；By by down channel Broadband CQI and the absolute difference of subband CQI compare with the 2nd CQI difference threshold, it is judged that The frequency dependent characteristic of down channel.

Concrete, when meeting equation below, it is determined that the frequency of down channel is uneven, otherwise, it is determined that under The frequency-flat of row channel.

Wherein, the 2nd CQI difference threshold is the positive integer more than 0.

Fig. 9 show the value of the another kind of precoding type instruction that the embodiment of the present invention provides and determines method Flow chart, it at least includes operating as follows:

Whether the value of the PTI reported for L time before step 900, judgement is 1, and L is more than or equal to 1 Integer.

If it is, perform step 910, the value that determines this PTI reported is 0.

Otherwise, the value perform step 920, determining this PTI reported is 1.

In step 900, whether the value of the PTI reported for L time continuously before specifically may determine that is 1, Whether the value of the PTI reported for discontinuous L time before can also judging is 1.Preferably, it is judged that Whether the value of the nearly PTI reported for L time continuously is 1.

The embodiment of the present invention provide method can but be not limited only in terminal realize.

The embodiment of the present invention provide method can but be applicable not only to LTE system.

Based on the inventive concept as method, the embodiment of the present invention also provides for the instruction of a kind of precoding type Value determines device, as shown in Figure 10, and including:

Channel situation determines module 1001, is used for determining down channel situation of change；

PTI determines module 1002, for according to the described down channel situation of change determined, determines on this The value of the PTI of report.

The technical scheme that the embodiment of the present invention provides, it is provided that determine PTI, i.e. the feedback report of terminal to report Type realize device, thus be used for controlling feedback and report process.

In a kind of implementation, described channel situation determine module 1001 for:

Described PTI determine module 1002 for:

Wherein, it is judged that whether broadband the oneth PMI of down channel can become in current PTI report cycle During change, described channel situation determine module 1001 for:

Obtain PTI report cycle；

Obtain the correlation time of broadband the oneth PMI of down channel；

Wherein, when obtaining correlation time of broadband the oneth PMI of down channel, described channel situation determines mould Block 1001 is used for:

Wherein, it is judged that during the time-varying characteristics of down channel, described channel situation determine module 1001 for:

Wherein, when obtaining correlation time of broadband the 2nd PMI of down channel, described channel situation determines mould Block 1001 is used for:

Wherein, obtain broadband CQI correlation time time, described channel situation determine module 1001 for:

Wherein, it is judged that during the frequency dependent characteristic of down channel, described channel situation determine module 1001 for:

Based on the inventive concept as method, the embodiment of the present invention also provides for a kind of terminal, such as Figure 11 institute Show, including:

Processor 1100, for reading the program in memorizer 1120, performs following process:

Determine down channel situation of change；

According to the described down channel situation of change determined, determine that this precoding type reported indicates PTI Value；

Transceiver 1110, for receiving and sending data under the control of processor 1100；

Memorizer 1120, for preserving the data that processor 1100 is used when performing operation.

Wherein, in fig. 11, bus architecture can include bus and the bridge of any number of interconnection, specifically The various electricity of the memorizer that the one or more processors represented by processor 1100 and memorizer 1120 represent Road links together.Bus architecture can also by such as ancillary equipment, manostat and management circuit etc. it Other electrical chains various of class are connected together, and these are all to it is known in the art, therefore, the most right It is described further.EBI provides interface.Transceiver 1110 can be multiple element, i.e. wraps Include transmitter and receiver, it is provided that for the unit communicated with other devices various over a transmission medium.For Different subscriber equipmenies, user interface 1130 can also is that can external in connect the interface needing equipment, even The equipment connect includes but not limited to keypad, display, speaker, mike, stick etc..

Processor 1100 is responsible for bus architecture and common process, and memorizer 1120 can store process The data that device 1100 is used when performing operation.

The terminal that the embodiment of the present invention provides, it is possible to determine PTI, i.e. the feedback report type of terminal to report, Thus be used for controlling feedback and report process.

Based on the inventive concept as method, the embodiment of the present invention also provides for the instruction of a kind of precoding type Value determines device, as shown in figure 12, and including:

PTI history value judge module 1201, the precoding type reported for L time before judging instruction Whether the value of PTI is 1, and L is the integer more than or equal to 1；

PTI determines module 1202, is used for when the judged result of described PTI history value judge module is for being, The value then determining this PTI reported is 0；Judged result at described PTI history value judge module For time no, determine that the value of this PTI reported is 1.

Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or meter Calculation machine program product.Therefore, the present invention can use complete hardware embodiment, complete software implementation or knot The form of the embodiment in terms of conjunction software and hardware.And, the present invention can use and wherein wrap one or more Computer-usable storage medium containing computer usable program code (include but not limited to disk memory, CD-ROM, optical memory etc.) form of the upper computer program implemented.

The present invention is with reference to method, equipment (system) and computer program product according to embodiments of the present invention The flow chart of product and/or block diagram describe.It should be understood that can by computer program instructions flowchart and / or block diagram in each flow process and/or flow process in square frame and flow chart and/or block diagram and/ Or the combination of square frame.These computer program instructions can be provided to general purpose computer, special-purpose computer, embedding The processor of formula datatron or other programmable data processing device is to produce a machine so that by calculating The instruction that the processor of machine or other programmable data processing device performs produces for realizing at flow chart one The device of the function specified in individual flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.

These computer program instructions may be alternatively stored in and computer or the process of other programmable datas can be guided to set In the standby computer-readable memory worked in a specific way so that be stored in this computer-readable memory Instruction produce and include the manufacture of command device, this command device realizes in one flow process or multiple of flow chart The function specified in flow process and/or one square frame of block diagram or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, makes Sequence of operations step must be performed to produce computer implemented place on computer or other programmable devices Reason, thus the instruction performed on computer or other programmable devices provides for realizing flow chart one The step of the function specified in flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.

Although preferred embodiments of the present invention have been described, but those skilled in the art once know base This creativeness concept, then can make other change and amendment to these embodiments.So, appended right is wanted Ask and be intended to be construed to include preferred embodiment and fall into all changes and the amendment of the scope of the invention.

Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.

Claims

1. the value of a precoding type instruction determines method, it is characterised in that including:

Determine down channel situation of change；

Method the most according to claim 1, it is characterised in that described determine down channel change feelings Condition, including:

According to the described down channel situation of change determined, determine the value of this PTI reported, including:

Method the most according to claim 3, it is characterised in that described true in current downlink subframe Fixed width band the oneth PMI, it is judged that described broadband the oneth PMI determined in current downlink subframe with on once go up Broadband the oneth PMI of report is the most identical, and judges that broadband the oneth PMI of down channel is in current PTI week Whether can change in phase, including:

Current downlink subframe determines broadband the oneth PMI；

Method the most according to claim 5, it is characterised in that described determine in current downlink subframe Broadband the oneth PMI, it is judged that described broadband the oneth PMI that current downlink subframe determines with on once report PMI is the most identical in broadband the oneth, and judges the time-varying characteristics of down channel, including:

Broadband the oneth PMI is determined in current downlink subframe；

Described according to the described down channel situation of change determined, determine the value of this PTI reported, bag Include:

Method the most according to claim 7, it is characterised in that described determine in current downlink subframe Broadband the oneth PMI, it is judged that described broadband the oneth PMI that current downlink subframe determines with on once report PMI is the most identical in broadband the oneth, it is judged that broadband the oneth PMI of down channel is within the current PTI cycle No meeting changes, and judges the time-varying characteristics of down channel, including:

Broadband the oneth PMI is determined in current downlink subframe；

Method the most according to claim 9, it is characterised in that described true in current downlink subframe Fixed width band the oneth PMI, it is judged that described broadband the oneth PMI that current downlink subframe determines with on once report Broadband the oneth PMI the most identical, it is judged that the time-varying characteristics of down channel, and judge down channel frequency become Characteristic, including:

Current downlink subframe determines broadband the oneth PMI；

11. methods according to claim 1, it is characterised in that described determine down channel change feelings Condition, including:

12. methods according to claim 11, it is characterised in that described in current downlink subframe Determine broadband the oneth PMI, it is judged that described broadband the oneth PMI that current downlink subframe determines with on once go up Broadband the oneth PMI of report is the most identical, it is judged that broadband the oneth PMI of down channel is in the current PTI cycle The most whether can change, it is judged that the time-varying characteristics of down channel, and judge the frequency dependent characteristic of down channel, Including:

Current downlink subframe determines broadband the oneth PMI；

13. according to the method according to any one of claim 3,4,7,8,11,12, and its feature exists In, whether described broadband the oneth PMI judging down channel can change in current PTI report cycle, Including:

Obtain PTI report cycle；

Obtain the correlation time of broadband the oneth PMI of down channel；

14. methods according to claim 13, it is characterised in that the width of described acquisition down channel With the correlation time of a PMI, including:

15. according to the method described in any one of claim 5～12, it is characterised in that described judgement is descending The time-varying characteristics of channel, including:

16. methods according to claim 15, it is characterised in that the width of described acquisition down channel With the correlation time of the 2nd PMI, including:

17. methods according to claim 15, it is characterised in that the phase of described acquisition broadband CQI The pass time, including:

18. according to the method described in any one of claim 9～12, it is characterised in that described judgement is descending The frequency dependent characteristic of channel, including:

The value of 19. 1 kinds of precoding type instructions determines method, it is characterised in that including:

If it is, determine that the value of this PTI reported is 0；

Otherwise, it determines the value of this PTI reported is 1.

The value of 20. 1 kinds of precoding type instructions determines device, it is characterised in that including:

21. devices according to claim 20, it is characterised in that described channel situation determines module For:

Described PTI determine module for:

22. devices according to claim 20, it is characterised in that described channel situation determines module For:

Described PTI determine module for:

23. devices according to claim 20, it is characterised in that described channel situation determines module For:

Described PTI determine module for:

24. devices according to claim 20, it is characterised in that described channel situation determines module For:

Described PTI determine module for:

25. devices according to claim 20, it is characterised in that described channel situation determines module For:

Described PTI determine module for:

26. devices according to claim 20, it is characterised in that described channel situation determines module For:

Described PTI determine module for:

27. according to the device according to any one of claim 22,24,26, it is characterised in that judge When whether broadband the oneth PMI of down channel can change in current PTI report cycle, described channel Situation determine module for:

Obtain PTI report cycle；

Obtain the correlation time of broadband the oneth PMI of down channel；

28. devices according to claim 27, it is characterised in that obtain the broadband the of down channel During correlation time of one PMI, described channel situation determine module for:

29. according to the device described in any one of claim 23～26, it is characterised in that judge down channel Time-varying characteristics time, described channel situation determine module for:

30. devices according to claim 29, it is characterised in that obtain the broadband the of down channel During correlation time of two PMI, described channel situation determine module for:

31. devices according to claim 29, it is characterised in that obtain broadband CQI relevant time Between time, described channel situation determine module for:

32. according to the device described in claim 25 or 26, it is characterised in that judge the frequency of down channel Become characteristic time, described channel situation determine module for:

The value of 33. 1 kinds of precoding type instructions determines device, it is characterised in that including:

PTI history value judge module, the precoding type reported for L time before judging instruction PTI's Whether value is 1, and L is the integer more than or equal to 1；