CN106559165A

CN106559165A - A kind of method and apparatus of feeding back channel state information

Info

Publication number: CN106559165A
Application number: CN201510615525.0A
Authority: CN
Inventors: 马丁·库拉斯; 拉斯·席勒; 托马斯·豪斯泰因; 王磊; 陈大庚
Original assignee: Huawei Technologies Co Ltd; Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Current assignee: Huawei Technologies Co Ltd; Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Priority date: 2015-09-24
Filing date: 2015-09-24
Publication date: 2017-04-05
Anticipated expiration: 2035-09-24
Also published as: CN106559165B

Abstract

The present invention relates to the communications field, discloses a kind of method and apparatus of feeding back channel state information, the method is：When terminal unit is determined from as reference terminal equipment, reported to network side according to the channel condition information of itself and peripheral terminal equipment is sent to using D2D modes, when terminal unit is determined from as non-reference terminal unit, receive the channel condition information that the reference terminal equipment of periphery sends, and a reference terminal equipment is chosen, and the one kind or whole in following two information is reported to network side：The difference of the channel condition information of the channel condition information of itself and the reference terminal equipment chosen, and, the mark of the reference terminal equipment of selection.So, what only reference terminal equipment reported is complete channel condition information, rather than reference terminal equipment reports is only difference, can greatly reduce feedback quantity, so as to effectively reduce overhead, improve systematic function.

Description

A kind of method and apparatus of feeding back channel state information

Technical field

The present invention relates to the communications field, more particularly to a kind of method and apparatus of feeding back channel state information.

Background technology

With the continuous development of mobile communication, lift system handling capacity is the urgent of Next generation cellular communication system Demand, and multiple-input and multiple-output (Multple Input Multiple Output, MIMO) is therein conventional Technology, extensive antenna technology (Large Scale MIMO, LSM) is by affixing one's name in network equipment sidepiece A large amount of antennas are improving the handling capacity of system.And FDD (Frequency division duplex, FDD), It is a kind of conventional duplex mode under LSM technologies.

For multiaerial system, the network equipment before downlink data is sent, need according to descending channel information come Generating pre-coding matrix is used for multi-antenna transmission.And for FDD system, terminal unit needs basis Descending pilot frequency measures descending channel information, then reports the network equipment.

For example, with the TM8 agreements/TM9 of Long Term Evolution (Long Term Evolution, LTE) system As a example by agreement.

The network equipment first sends descending pilot frequency, e.g., sends channel state information reference signals (Channel State Information Reference Signal, CSI-RS).CSI-RS is sent at regular intervals.

Terminal unit receives CSI-RS, and carries out down channel measurement, and then measurement result calculates corresponding Pre-coding matrix instruction (Precoding Matrix Indicator, PMI), order instruction (rank indication, RI) and channel quality indicates (Channel Quality Indicator, CQI), and by PMI, RI and CQI The network equipment is reported as descending channel information.

The network equipment generates pre-coding matrix according to the descending channel information that terminal unit is reported is used for lower line number According to transmission.

Then, in existing feedback of channel information scheme, system can consume very big resource for feeding back Expense, and feedback overhead increases with increasing for terminal unit number.For example, if antenna is on a grand scale Or terminal unit number is a lot, then can be non-for the overhead of down channel measurement and uplink feedback in system Chang great, can cause serious operating load to system.

The content of the invention

A kind of method and apparatus of feeding back channel state information is embodiments provided, for reducing system Expense.

Concrete technical scheme provided in an embodiment of the present invention is as follows：

First aspect, a kind of method of feeding back channel state information, including：

Non-reference terminal unit receives one or more reference terminal equipment by device-to-device D2D modes The channel condition information of transmission；

Non-reference terminal unit carries out channel measurement according to the first descending pilot frequency that network side sends and obtains itself Channel condition information；

Non-reference terminal unit chooses a reference terminal equipment；

Non-reference terminal unit is reported to network side by the one kind in following two information or all：The letter of itself The difference of the channel condition information of channel state information and the reference terminal equipment chosen, and, the reference of selection The mark of terminal unit.

With reference in a first aspect, in the first possible implementation, non-reference terminal unit is received with reference to eventually Before the channel condition information that end equipment sends, further include：Non-reference terminal unit determines the end of itself End type is non-reference terminal unit.

With reference to the first possible implementation of first aspect, in second possible implementation, institute State non-reference terminal unit and determine that the terminal type of itself is one kind that non-reference terminal unit is following manner Or it is various：

During non-reference terminal unit is according to access system, the configured information that network side is issued determines itself Terminal type is non-reference terminal unit；

Or,

After non-reference terminal unit is according to access system, the configured information that network side is issued determines the terminal of itself Type is non-reference terminal unit；

Or,

It itself is non-reference terminal equipment that non-reference terminal unit is determined according to the mark of itself.

With reference to first aspect or above-mentioned any one possible implementation of first aspect, may at the third Implementation in, if reference terminal equipment is for multiple, non-reference terminal unit chooses a reference terminal Equipment, including：

Non-reference terminal unit calculates the channel condition information of itself respectively with the plurality of reference terminal equipment Channel condition information similarity；

Non-reference terminal unit chooses a high reference terminal equipment of similarity.

It is with reference to the third possible implementation of first aspect, in the 4th kind of possible implementation, non- Reference terminal equipment chooses a high reference terminal equipment of similarity, including：

Non-reference terminal unit chooses similarity one reference terminal equipment of highest.

With reference to first aspect or above-mentioned any one possible implementation of first aspect, in the 5th kind of possibility Implementation in, if reference terminal equipment be one, non-reference terminal unit choose a reference terminal Equipment, including：

Non-reference terminal unit directly chooses one reference terminal equipment

With reference to first aspect or above-mentioned any one possible implementation of first aspect, in the 6th kind of possibility Implementation in, non-reference terminal unit is by the one kind in following two information or all on network side Report：The difference of the channel condition information of the channel condition information of itself and the reference terminal equipment chosen, and, The mark of the reference terminal equipment of selection, including：

Non-reference terminal unit judges the channel of the channel condition information of itself and the reference terminal equipment chosen Whether the difference of status information is zero, it is determined that when being not zero, by the channel condition information of itself and the ginseng chosen The difference of the channel condition information of terminal unit is examined, and, the mark of the reference terminal equipment, to network Side reports.

With reference to first aspect or above-mentioned any one possible implementation of first aspect, in the 7th kind of possibility Implementation in, non-reference terminal unit is by the one kind in following two information or all on network side Report：The difference of the channel condition information of the channel condition information of itself and the reference terminal equipment chosen, and, The mark of the terminal unit of selection, including：

Non-reference terminal unit judges the channel of the channel condition information of itself and the reference terminal equipment chosen Whether the difference of status information is zero, when being defined as zero, by the mark of the reference terminal equipment chosen, to net Network side reports.

With reference to first aspect or above-mentioned any one possible implementation of first aspect, in the 8th kind of possibility Implementation in, further include：

Non-reference terminal unit determines itself by non-reference terminal unit according to the configured information that network side sends Reference terminal equipment is converted to, the second descending pilot frequency sent according to network side carries out channel measurement and obtains itself Channel condition information, and the channel condition information of acquisition is reported to network side and using D2D modes Send to peripheral terminal equipment.

With reference to first aspect or above-mentioned any one possible implementation of first aspect, in the 9th kind of possibility Implementation in, the channel condition information include at least channel quality information CQI；Or, the letter Channel state information includes at least CQI and pre-coding matrix instruction PMI.

Second aspect, a kind of method of feeding back channel state information, including：

Reference terminal equipment carries out channel measurement according to the 3rd descending pilot frequency that network side sends and obtains itself Channel condition information；

The channel condition information of acquisition is reported to network side and adopts device-to-device by reference terminal equipment D2D modes are sent to peripheral terminal equipment.

With reference to second aspect, in the first possible implementation, reference terminal equipment is sent out according to network side The 3rd descending pilot frequency for sending carries out before channel measurement obtains the channel condition information of itself, further including；

Reference terminal equipment determines that the terminal type of itself is reference terminal equipment.

With reference to the first possible implementation of second aspect, in second possible implementation, institute State reference terminal equipment and determine that the terminal type of itself is one kind or many that reference terminal equipment is following manner Kind：

During reference terminal equipment is according to access system, the configured information that network side is issued determines the end of itself End type is reference terminal equipment；

Or,

After reference terminal equipment is according to access system, the configured information that network side is issued determines the terminal class of itself Type is reference terminal equipment；

Or,

It itself is reference terminal equipment that reference terminal equipment is determined according to the mark of itself.

With reference to second aspect or above-mentioned any one possible implementation of second aspect, may at the third Implementation in, further include：

According to the configured information that network side sends, reference terminal equipment determines that itself is changed by reference terminal equipment For non-reference terminal unit when, receive the letter that one or more reference terminal equipment are sent by D2D modes Channel state information, the 4th descending pilot frequency sent according to network side carry out the letter that channel measurement obtains the equipment Channel state information, chooses a reference terminal equipment, and by the one kind in following two information or all to net Network side reports：The channel condition information of the equipment and the channel condition information of the reference terminal equipment chosen Difference, and, the mark of the reference terminal equipment of selection.

With reference to the third possible implementation of second aspect, in the 4th kind of possible implementation, institute Channel condition information is stated including at least channel quality information CQI；Or, the channel condition information is at least wrapped Containing CQI and pre-coding matrix instruction PMI.

The third aspect, a kind of equipment of feeding back channel state information, including：

Receptor, is sent out by device-to-device D2D modes for receiving one or more reference terminal equipment The channel condition information for sending；

Processor, the first descending pilot frequency for being sent according to network side carry out channel measurement and obtain the equipment Channel condition information, and choose a reference terminal equipment；

Transmitter, for by the one kind in following two information or all reporting to network side：The equipment The difference of the channel condition information of channel condition information and the reference terminal equipment chosen, and, the ginseng of selection Examine the mark of terminal unit.

With reference to the third aspect, in the first possible implementation, receptor receives reference terminal equipment and sends out Before the channel condition information for sending, processor is further used for：Determine the equipment terminal type be non-ginseng Examine terminal unit.

With reference to the first possible implementation of the third aspect, in second possible implementation, place Reason device determines that the terminal type of the equipment is one or more that non-reference terminal unit is following manner：

During access system, the configured information that network side is issued determines that the terminal type of the equipment is Non-reference terminal unit；

Or,

After access system, the configured information that network side is issued determines that the terminal type of the equipment is non-ginseng Examine terminal unit；

Or,

Determine that the equipment is non-reference terminal equipment according to the mark of the equipment.

With reference to the third aspect or above-mentioned any one possible implementation of the third aspect, may at the third Implementation in, if reference terminal equipment is for multiple, processor chooses a reference terminal equipment, bag Include：

Processor calculates the channel condition information of the equipment and the letter of the plurality of reference terminal equipment respectively The similarity of channel state information；

Processor chooses a high reference terminal equipment of similarity.

With reference to the third possible implementation in the 3rd face, in the 4th kind of possible implementation, process Device chooses a high reference terminal equipment of similarity, including：

Processor chooses similarity one reference terminal equipment of highest.

With reference to the third aspect or above-mentioned any one possible implementation of the third aspect, in the 5th kind of possibility Implementation in, if reference terminal equipment be one, processor choose a reference terminal equipment, bag Include：

Processor directly chooses one reference terminal equipment

With reference to the third aspect or above-mentioned any one possible implementation of the third aspect, in the 6th kind of possibility Implementation in, transmitter is reported to network side by the one kind in following two information or all：It is described to set The difference of the channel condition information of standby channel condition information and the reference terminal equipment chosen, and, choose Reference terminal equipment mark, including：

Processor judges the channel condition information of the equipment and the channel status of the reference terminal equipment chosen Whether the difference of information is zero, it is determined that when being not zero, transmitter is by the channel condition information of the equipment and selects The difference of the channel condition information of the reference terminal equipment for taking, and, the mark of the reference terminal equipment of selection, Report to network side.

With reference to the third aspect or above-mentioned any one possible implementation of the third aspect, in the 7th kind of possibility Implementation in, transmitter is reported to network side by the one kind in following two information or all：It is described to set The difference of the channel condition information of standby channel condition information and the reference terminal equipment chosen, and, choose Terminal unit mark, including：

Processor judges the channel condition information of the equipment and the channel condition information of the terminal unit chosen Difference whether be zero, when being defined as zero, transmitter by choose reference terminal equipment mark, to network Side reports.

With reference to the third aspect or above-mentioned any one possible implementation of the third aspect, in the 8th kind of possibility Implementation in, processor is further used for：

Determine that the equipment is converted to reference by non-reference terminal unit according to the configured information that network side sends Terminal unit, the second descending pilot frequency sent according to network side carry out the channel that channel measurement obtains the equipment Status information；

The transmitter is further used for：

The channel condition information of acquisition is reported to network side and using D2D modes to peripheral terminal equipment Send.

With reference to the third aspect or above-mentioned any one possible implementation of the third aspect, in the 9th kind of possibility Implementation in, the channel condition information include at least channel quality information CQI；Or, the letter Channel state information includes at least CQI and pre-coding matrix instruction PMI.

Fourth aspect, a kind of equipment of feeding back channel state information, including：

Processor, the 3rd descending pilot frequency for being sent according to network side carry out channel measurement and obtain the equipment Channel condition information；

Transmitter, for reporting the channel condition information of acquisition to network side and adopting device-to-device D2D modes are sent to peripheral terminal equipment.

With reference to fourth aspect, in the first possible implementation, processor sent according to network side Three descending pilot frequencies carry out before channel measurement obtains the channel condition information of itself, being further used for；

Processor determines that the terminal type of the equipment is reference terminal equipment.

With reference to the first possible implementation of fourth aspect, in second possible implementation, place Reason device determines that the terminal type of the equipment is one or more that reference terminal equipment is following manner：

During processor is according to access system, the configured information that network side is issued determines the terminal of the equipment Type is reference terminal equipment；

Or,

After processor is according to access system, the configured information that network side is issued determines the terminal type of the equipment For reference terminal equipment；

Or,

According to the mark of the equipment, processor determines that the equipment is reference terminal equipment.

With reference to fourth aspect or above-mentioned any one possible implementation of fourth aspect, may at the third Implementation in, further include：

Receptor, the configured information for being sent according to network side determine that the equipment is turned by reference terminal equipment When being changed to non-reference terminal unit, receive what one or more reference terminal equipment were sent by D2D modes Channel condition information；

Processor is further used for：

The 4th descending pilot frequency sent according to network side carries out the channel status that channel measurement obtains the equipment Information, chooses a reference terminal equipment；

Transmitter is further used for：

Report to network side by the one kind in following two information or all：The channel condition information of the equipment With choose reference terminal equipment channel condition information difference, and, the reference terminal equipment of selection Mark.

With reference to the third possible implementation of fourth aspect, in the 4th kind of possible implementation, institute Channel condition information is stated including at least channel quality information CQI；Or, the channel condition information is at least wrapped Containing CQI and pre-coding matrix instruction PMI.

In sum, in the embodiment of the present invention, when terminal unit is determined from as reference terminal equipment, according to The channel condition information of itself is reported to network side and is sent to peripheral terminal equipment using D2D modes, When terminal unit is determined from as non-reference terminal unit, the channel that the reference terminal equipment of periphery sends is received Status information, and choose a reference terminal equipment, and report to network side in following two information one Plant or whole：The difference of the channel condition information of the channel condition information of itself and the reference terminal equipment chosen Value, and, the mark of the reference terminal equipment of selection.So, only reference terminal equipment report be Whole channel condition information, rather than reference terminal equipment reports is only difference, terminal unit it is intensive should With under scene, the difference of the channel condition information between adjoining terminal is simultaneously little, therefore, different Feedback quantity can be greatly reduced come feeding back channel state information using the mode of difference between terminal unit, so as to Overhead is effectively reduced, systematic function is improved.

Description of the drawings

Fig. 1 is system architecture schematic diagram in the embodiment of the present invention；

Fig. 2A carries out information feedback flow chart for non-reference terminal unit in the embodiment of the present invention；

Fig. 2 B carry out information feedback flow chart for reference terminal equipment in the embodiment of the present invention；

It is anti-that Fig. 2 C carry out channel condition information based on D2D passages for terminal unit provided in an embodiment of the present invention Feedback detail flowchart；

Fig. 3 is non-reference terminal unit structural representation in the embodiment of the present invention；

Fig. 4 is non-reference terminal unit structural representation in the embodiment of the present invention.

Specific embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of the invention, is not Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation Property work under the premise of the every other embodiment that obtained, belong to the scope of protection of the invention.

In order to solve the expense of system uplink feedback, the problem for increasing with terminal unit number and increasing is referred to Shown in Fig. 1, in the embodiment of the present invention, all terminal units are divided into into two classes：Reference terminal equipment and non-ginseng Examine terminal unit.The division of terminal unit classification can be specified by the network equipment or terminal unit is according to itself Mark judge that reference terminal equipment and non-reference terminal unit are respectively adopted different mode reporting channel shapes State information.Reference terminal equipment can specify to send channel condition information to network side according to existing protocol, and And reference terminal equipment refers to that its channel condition information can be used as the reference of non-reference terminal unit；Rather than What reference terminal equipment referred to its channel condition information reports the channel shape needed based on reference terminal equipment State information.

The network equipment could be for the equipment with terminal equipment in communication, and the network equipment can be that the whole world is mobile logical News (Global System of Mobile communication, GSM) or CDMA (Code Division Multiple Access, CDMA) in base station (Base Transceiver Station, BTS), it is also possible to It is the base in WCDMA (Wideband Code Division Multiple Access, WCDMA) Stand (NodeB, NB), can also be the eNB in Long Term Evolution (Long Term Evolution, LTE) Or evolved base station (Evolutional Node B, eNodeB) or access point, or mobile unit, can wear Equipment is worn, the public land mobile network of network equipment or following evolution in following 5G networks The network equipment in (Public Land Mobile Network, PLMN) network.

Terminal unit (including the reference terminal equipment and non-reference terminal unit of the application) is referred to as using Family equipment (User Equipment, UE) user equipment, access terminal, subscriber unit, subscriber station, shifting Dynamic station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, radio communication set Standby, user agent or user's set.Access terminal can be cell phone, wireless phone, session initiation association View (Session Initiation Protocol, SIP) phone, WLL (Wireless Local Loop, WLL) stand, personal digital assistant (Personal Digital Assistant, PDA), with radio communication work( Can handheld device, computing device or be connected to other processing equipments of radio modem, mobile unit, Wearable device, the public land mobile network of terminal unit or following evolution in following 5G networks Terminal unit in (Public Land Mobile Network, PLMN) network.

Refering to shown in Fig. 2A, in the embodiment of the present invention, it is anti-that non-reference terminal unit carries out channel condition information The flow process of feedback is as follows：

Step 2100：Non-reference terminal unit receives one or more reference terminal equipment by D2D modes The channel condition information of transmission.

In the embodiment of the present invention, before execution step 2100, non-reference terminal unit determines the end of itself End type is non-reference terminal unit, and specifically, non-reference terminal unit determines that the terminal type of itself is non- One or more for following manner of reference terminal equipment：

According to access system process, the configured information that network side is issued determines the end of itself to non-reference terminal unit End type is non-reference terminal unit；

Or,

Step 2101：Non-reference terminal unit carries out channel measurement according to the first descending pilot frequency that network side sends Obtain the channel condition information of itself.

Step 2102：Non-reference terminal unit chooses a reference terminal equipment.

Specifically, it is divided into following two situations：

The first situation is：If reference terminal equipment is multiple, in execution step 2102, non-ginseng Examine the channel shape that terminal unit calculates the channel condition information of itself and the plurality of reference terminal equipment respectively The similarity of state information, and choose a high reference terminal equipment of similarity；Preferably, non-reference terminal Equipment can choose one reference terminal equipment of similarity highest.

In the embodiment of the present invention, similarity can have many calculations, preferably, difference side can be adopted Formula calculates the similarity between two channel condition informations, that is, calculate the difference between two channel condition informations Value, difference are bigger, and similarity is lower, certainly, also have other to calculate the mode of similarity, and here is no longer gone to live in the household of one's in-laws on getting married State.

On the other hand, in the embodiment of the present invention, so-called similarity is high, that is, refer to the value of similarity pre- In the span paid, by taking difference as an example, not less than setting span, difference can be considered that similarity is high.

Second situation be：If reference terminal equipment is one, non-reference terminal unit is directly chosen should One reference terminal equipment.

Step 2103：Non-reference terminal unit is by the one kind in following two information or all on network side Report：The difference of the channel condition information of the channel condition information of itself and the reference terminal equipment chosen, and, The mark of the reference terminal equipment of selection.

Specifically, in execution step 2103, non-reference terminal can be adopted but be not limited to following two sides Formula：

First kind of way is：Non-reference terminal unit judges the channel condition information of itself with the reference chosen eventually Whether the difference of the channel condition information of end equipment is zero, it is determined that when being not zero, the channel status of itself is believed The difference of the channel condition information of breath and the reference terminal equipment chosen, and, the reference terminal equipment Mark, reports to network side.

The second way is：Non-reference terminal unit judges the channel condition information of itself with the reference chosen eventually Whether the difference of the channel condition information of end equipment is zero, when being defined as zero, the reference terminal equipment that will be chosen Mark, report to network side.

Based on step 2100- step 2103, in the course of the work, if not reference terminal equipment is according to network The configured information that side sends determines that itself is converted to reference terminal equipment by non-reference terminal unit, according to network The second descending pilot frequency that side sends carries out channel measurement and obtains the channel condition information of itself, and the letter that will be obtained Channel state information is reported to network side and is sent to peripheral terminal equipment using D2D modes, wherein, the One descending pilot frequency is identical with the second descending pilot frequency, and it is different simply to issue the time, certainly, the first descending pilot frequency with Second descending pilot frequency can also be differed.Description other parts are similar to be explained, does not repeat one by one.

The channel condition information referred in above-mentioned flow process includes at least CQI；Or, channel condition information is at least Comprising CQI and PMI.

Refering to shown in Fig. 2 B, in the embodiment of the present invention, reference terminal equipment carries out information feedback Flow process it is as follows：

Step 2200：Reference terminal equipment carries out channel measurement according to the 3rd descending pilot frequency that network side sends and obtains Obtain the channel condition information of itself.

Before execution step 2200, reference terminal equipment is it needs to be determined that the terminal type of itself is with reference to eventually End equipment, specifically can be in the following way one or more：

According to access system process, the configured information that network side is issued determines the terminal of itself to reference terminal equipment Type is reference terminal equipment；

Or,

Step 2201：The channel condition information of acquisition is reported to network side and is adopted and set by reference terminal equipment It is standby to send to equipment D2D modes to peripheral terminal equipment.

Based on step 2201- step 2202.In the course of the work, if reference terminal equipment is according to network side The configured information of transmission determines that itself is converted to non-reference terminal unit by reference terminal equipment, then receive one Or the channel condition information that multiple reference terminal equipment are sent by D2D modes, sent according to network side 4th descending pilot frequency carries out the channel condition information that channel measurement obtains the equipment, chooses a reference terminal Equipment, and report to network side by the one kind in following two information or all：The channel status letter of this equipment The difference of the channel condition information of breath and the reference terminal equipment chosen, and, the reference terminal equipment of selection Mark；Wherein, the 4th descending pilot frequency can be identical with the 3rd descending pilot frequency, only issues the time different； Certain 4th descending pilot frequency can also be differed with the 3rd descending pilot frequency.Description other parts are similar to be explained, Do not repeat one by one.

In the same manner, channel condition information includes at least CQI；Or, channel condition information includes at least CQI And PMI.

Based on above-described embodiment, refering to shown in Fig. 2 C, terminal unit carries out the detailed stream of feedback of channel information Journey is as follows：

Step 200：Terminal unit judges it itself is reference terminal equipment or non-reference terminal unit；If Reference terminal equipment, then execution step 210；If non-reference terminal unit, then execution step 230.

Specifically, terminal unit can be according to during access system or after access system, and the instruction of the network equipment is believed Breath itself is reference terminal equipment to determine, or non-reference terminal unit, it is also possible to according to the mark of itself Determine it itself is reference terminal equipment or non-reference terminal unit.

Step 210：Terminal unit sends the information state of itself using the peritropous terminal unit of D2D modes Information (Channel State Information, CSI).

Specifically, the descending pilot frequency that terminal unit can be periodically sent according to network side carries out down channel survey Amount, so as to obtain the CSI of down channel.

Step 220：Terminal unit reports the CSI of itself to network side.

Step 230:Terminal unit receives the CSI of other reference terminal equipment transmissions of periphery, chooses a ginseng Examine terminal unit.

Specifically, CSI can at least include the CQI of terminal unit measurement, or, at least including terminal The CQI and PMI of device measuring.

Step 240：Terminal unit calculates the CSI of itself, and the CSI of itself and the reference terminal chosen The difference of the CSI of equipment.

Specifically, above-mentioned difference, refers to each parameter in the CSI of itself that terminal unit is calculated, and Difference in the CSI of the reference terminal equipment of selection between corresponding parameter.

Step 250：Terminal unit reports the CSI of the CSI of itself and the reference terminal equipment chosen to network side Difference and choose reference terminal equipment ID.

Obviously, in the embodiment of the present invention, when terminal unit is determined from as non-reference terminal unit, receive week After the CSI that side reference terminal equipment sends, a reference terminal equipment is chosen, the CSI of itself is calculated with choosing The difference of the CSI of the reference terminal equipment for taking, then by the mark of the difference and the reference terminal equipment chosen Offer network side.Specifically, before being reported, terminal unit first judges the CSI of itself with selection Whether the difference of the CSI of reference terminal equipment is zero, it is determined that when being not zero, by the CSI of itself and selection The difference of the CSI of reference terminal equipment, and the mark of the reference terminal equipment chosen, report to network side, So, only report difference, it is possible to reduce overhead；When being defined as zero, only the reference terminal of selection is set Standby mark is reported to network side, as such, it is possible to further reduce overhead.

With reference to specific application scenarios, further description is made to above-described embodiment.

First scene：By taking cell A as an example, it is assumed that there are 200 terminal units in cell A simultaneously. During each terminal equipment access system, terminal class of the network equipment by instruction message designated terminal equipment. In cell A, it is assumed that it is reference terminal equipment that the network equipment specifies wherein 50 terminal units, and remaining 150 Individual terminal unit is non-reference terminal unit, and under the network equipment adopts the time interval for setting periodically Descending pilot frequency is sent out, so that each terminal unit carries out down channel measurement.

If terminal unit is reference terminal equipment, reference terminal equipment carries out down channel by descending pilot frequency Measurement, calculates the CQI of down channel, and using the CQI for obtaining as channel condition information；Then, join By D2D modes, periodically peritropous terminal unit is carried out by the CQI for calculating acquisition to examine terminal unit The CQI for calculating acquisition is also fed back to the network equipment by up channel with reference to terminal unit by transmission.

If terminal unit is non-reference terminal unit, non-reference terminal unit is carried out descending by descending pilot frequency Channel measurement, calculates the CQI of down channel, and using the CQI for obtaining as channel state information；Then, The CQI that non-reference terminal unit is sent by the reference terminal equipment that D2D modes receive periphery, and therefrom Choose the CQI value reference terminal equipment high with the CQI value similarity of itself.Preferably, Ke Yixuan A similarity highest reference terminal equipment is taken, and the corresponding CQI value of reference terminal equipment chosen is made On the basis of CQI.Non-reference terminal unit calculates the difference of the CQI of itself and benchmark CQI, then this is poor The ID of value and the reference terminal equipment chosen feeds back to the network equipment, wherein, it is if difference is zero, only anti- The ID of feedback reference termination equipment.

Second scene：By taking cell A as an example, it is assumed that there are 200 terminal units in cell A simultaneously. During each terminal equipment access system, terminal class of the network equipment by instruction message designated terminal equipment. In cell A, it is assumed that it is reference terminal equipment that the network equipment specifies wherein 50 terminal units, and remaining 150 Individual terminal unit is non-reference terminal unit, and under the network equipment adopts the time interval for setting periodically Descending pilot frequency is sent out, so that each terminal unit carries out down channel measurement.

If terminal unit is reference terminal equipment, reference terminal equipment carries out down channel by descending pilot frequency Measurement, calculates the CQI and PMI of down channel, and using the CQI for obtaining and PMI as channel status Information；Then, reference terminal equipment will calculate obtain CQI and PMI by D2D modes periodically Peritropous terminal unit is transmitted, and will also calculate the CQI and PMI that obtain with reference to terminal unit The network equipment is fed back to by up channel.

If terminal unit is non-reference terminal unit, non-reference terminal unit is carried out descending by descending pilot frequency Channel measurement, calculates the CQI and PMI of down channel, and using the CQI for obtaining and PMI as channel Status information；Then, non-reference terminal unit is sent out by the reference terminal equipment that D2D modes receive periphery The CQI for sending and PMI, and a CQI value and PMI value are therefrom chosen with itself CQI value and PMI The high reference terminal equipment of value similarity.Preferably, a similarity highest reference terminal can be chosen to set It is standby, and using the corresponding CQI value of reference terminal equipment chosen and PMI value as benchmark CQI and base Quasi- PMI.Non-reference terminal unit calculates the difference of the CQI of itself and benchmark CQI, and calculates itself PMI and benchmark PMI difference, then two kinds of differences and the ID of reference terminal equipment for choosing are fed back to The network equipment, wherein, if difference is zero, the ID of a feedback reference terminal unit.

3rd scene：The network equipment periodically issues descending pilot frequency using the time interval of setting, for end End equipment carries out down channel measurement.Each terminal unit judges it itself is reference terminal according to self identification Equipment or non-reference terminal unit.For example, by taking LTE system as an example, terminal unit can according to cell without Line Network Temporary Identifier (Cell Radio Network Temporary Identifier, C-RNTI) is carrying out Judge, e.g., if (C-RNTI, is 4) zero to mod, then terminal unit is reference terminal equipment；If (then terminal unit is non-reference terminal equipment to mod for C-RNTI, 4) non-zero.

If terminal unit is non-reference terminal unit, non-reference terminal unit is carried out descending by descending pilot frequency Channel measurement, calculates the CQI of down channel, and using the CQI for obtaining as channel state information；Then, The CQI that non-reference terminal unit is sent by the reference terminal equipment that D2D modes receive periphery, and therefrom Choose the CQI value reference terminal equipment high with the CQI value similarity of itself, it is preferable that choose one Individual CQI value and the CQI value similarity highest reference terminal equipment of itself, and the reference terminal that will be chosen CQI on the basis of the corresponding CQI value of equipment.Non-reference terminal unit calculates the CQI of itself and benchmark CQI Difference, then the difference and the ID of reference terminal equipment for choosing are fed back to into the network equipment, wherein, if Difference is zero, then the ID of a feedback reference terminal unit.

Certainly, in practical application, the mark of reference terminal equipment can also be other specification, ID herein It is only for example.

4th scene：By taking cell A as an example, it is assumed that there are 200 terminal units in cell A simultaneously.Net Network equipment periodically issues descending pilot frequency using the time interval of setting, so that each terminal unit is carried out down Row channel measurement.

In the embodiment of the present invention, terminal unit sends configured information according to the network equipment and determines it itself is with reference to eventually End equipment or non-reference terminal unit, specifically, can be adopting but be not limited to following two modes：

First kind of way is：After terminal unit start, the first access system of meeting, completes network attachment in access procedure, I.e. terminal unit consults initial messaging parameter with the network equipment, and (e.g., the network equipment is instructed by RRC RRConnectionReconfiguration the type information of terminal unit is handed down to each terminal respectively) to set It is standby, therefore terminal unit can obtain initial terminal equipment type parameter (reference terminal equipment also right and wrong Reference terminal equipment)；

The second way is：After terminal equipment access system, the network equipment can according to current network state, The type information of self-adaptative adjustment terminal unit, i.e., in the course of the work, according to the fluctuation of network state, ginseng Examine terminal unit and can be converted to non-reference terminal unit, rather than reference terminal equipment can also be converted to reference Terminal unit, specifically, the network equipment continues to issue control instruction to terminal unit, and such as RRC is instructed, Specifically change can be issued by DCCH (Dedicated Control Channel, DCCH) The type information of terminal unit.

If terminal unit is non-reference terminal unit, non-reference terminal unit is carried out descending by descending pilot frequency Channel measurement, calculates the CQI of down channel, and using the CQI for obtaining as channel state information；Then, The CQI that non-reference terminal unit is sent by the reference terminal equipment that D2D modes receive periphery, and therefrom Choose the reference terminal equipment conduct of a CQI value and CQI value similarity height (preferably up to) of itself Reference termination equipment, and by CQI on the basis of reference termination equipment corresponding CQI value, non-reference terminal unit The difference of the CQI of itself and benchmark CQI is calculated, then the ID of the difference and reference termination equipment is fed back to The network equipment, wherein, if difference is zero, the ID of a feedback reference terminal unit.

Scheme provided in an embodiment of the present invention is mainly used in the FDD scenes of Large Scale mimo systems, Certainly for other systems, can also use Jing after accommodation, will not be described here.

Based on above-described embodiment, refering to shown in Fig. 3, in the embodiment of the present invention, a kind of fed-back channel status are believed The equipment (as non-reference terminal unit) of breath including receptor 30, processor 31 and transmitter 32, its In,

Receptor 30, for receiving the channel that one or more reference terminal equipment are sent by D2D modes Status information；

Processor 31, the first descending pilot frequency for being sent according to network side carry out setting described in channel measurement acquisition Standby channel condition information, and choose a reference terminal equipment；

Transmitter 32, for by the one kind in following two information or all reporting to network side：The equipment Channel condition information with choose reference terminal equipment channel condition information difference, and, selection The mark of reference terminal equipment.

Preferably, before receptor 30 receives the channel condition information that reference terminal equipment sends, processor 31 are further used for：Determine the equipment terminal type be non-reference terminal unit.

Preferably, processor 31 determines that the terminal type of the equipment is such as lower section for non-reference terminal unit One or more of formula：

Or,

Preferably, if reference terminal equipment is multiple, processor 21 chooses a reference terminal equipment, Including：

Processor 31 calculates the channel condition information and the plurality of reference terminal equipment of the equipment respectively The similarity of channel condition information；

Processor 31 chooses a high reference terminal equipment of similarity.

Preferably, processor 31 chooses a high reference terminal equipment of similarity, including：

Processor 31 chooses similarity one reference terminal equipment of highest.

Preferably, if reference terminal equipment is one, processor 31 chooses a reference terminal equipment, Including：

Processor 31 directly chooses one reference terminal equipment

Preferably, transmitter 32 is reported to network side by the one kind in following two information or all：It is described The difference of the channel condition information of the channel condition information of equipment and the reference terminal equipment chosen, and, choosing The mark of the reference terminal equipment for taking, including：

Processor 31 judges the channel condition information of the equipment and the channel shape of the reference terminal equipment chosen Whether the difference of state information is zero, it is determined that when being not zero, the channel status of the equipment is believed by transmitter 32 The difference of the channel condition information of breath and the reference terminal equipment chosen, and, the reference terminal equipment of selection Mark, report to network side.

Preferably, transmitter 32 is reported to network side by the one kind in following two information or all：It is described The difference of the channel condition information of the channel condition information of equipment and the reference terminal equipment chosen, and, choosing The mark of the terminal unit for taking, including：

Processor 31 judges the channel condition information of the equipment and the channel status letter of the terminal unit chosen Whether the difference of breath is zero, when being defined as zero, transmitter 32 by choose reference terminal equipment mark, Report to network side.

Preferably, processor 31 is further used for：

Transmitter 32 is further used for：

The channel condition information includes at least CQI；Or, the channel condition information includes at least CQI And PMI.

Refering to shown in Fig. 4, in the embodiment of the present invention, a kind of equipment of feeding back channel state information is (as ginseng Examine terminal unit) including processor 41 and transmitter 42：

Processor 41, the 3rd descending pilot frequency for being sent according to network side carry out setting described in channel measurement acquisition Standby channel condition information；

Transmitter 42, for the channel condition information of acquisition is reported to network side and using D2D modes Send to peripheral terminal equipment.

Preferably, processor 41 carries out channel measurement according to the 3rd descending pilot frequency that network side sends being derived from Before the channel condition information of body, it is further used for；

Processor 41 determines that the terminal type of the equipment is reference terminal equipment.

Preferably, processor 41 determines that the terminal type of the equipment is that reference terminal equipment is following manner One or more：

During processor 41 is according to access system, the configured information that network side is issued determines the equipment Terminal type is reference terminal equipment；

Or,

After processor 41 is according to access system, the configured information that network side is issued determines the terminal of the equipment Type is reference terminal equipment；

Or,

According to the mark of the equipment, processor 41 determines that the equipment is reference terminal equipment.

Further include：

Receptor 40, the configured information for being sent according to network side determine the equipment by reference terminal equipment When being converted to non-reference terminal unit, receive one or more reference terminal equipment and sent by D2D modes Channel condition information；

Processor 41 is further used for：

Transmitter 42 is further used for：

Preferably, the channel condition information includes at least CQI；Or, the channel condition information is at least Comprising CQI and PMI.

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 be using complete hardware embodiment, complete software embodiment or knot The form of the embodiment in terms of conjunction software and hardware.And, the present invention can be using wherein wrapping at one or more Computer-usable storage medium containing computer usable program code (including but not limited to disk memory, CD-ROM, optical memory etc.) on the form of computer program implemented.

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

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

These computer program instructions can be also loaded in computer or other programmable data processing devices, made Obtain and series of operation steps is performed on computer or other programmable devices to produce computer implemented place Reason, so as to the instruction performed on computer or other programmable devices is provided for realizing in flow chart one The step of function of specifying in flow process or one square frame of multiple flow processs and/or block diagram or multiple square frames.

, but those skilled in the art once know base although preferred embodiments of the present invention have been described This creative concept, then can make other change and modification to these embodiments.So, appended right will Ask and be intended to be construed to include preferred embodiment and fall into the had altered of the scope of the invention and change.

Obviously, those skilled in the art can carry out various changes and modification and not take off to the embodiment of the present invention From the spirit and scope of the embodiment of the present invention.So, if these modifications of the embodiment of the present invention and modification belong to Within the scope of the claims in the present invention and its equivalent technologies, then the present invention be also intended to comprising these change and Including modification.

Claims

1. a kind of method of feeding back channel state information, it is characterised in that include：

Non-reference terminal unit chooses a reference terminal equipment；

2. the method for claim 1, it is characterised in that non-reference terminal unit is received with reference to eventually Before the channel condition information that end equipment sends, further include：Non-reference terminal unit determines the end of itself End type is non-reference terminal unit.

3. method as claimed in claim 2, it is characterised in that the non-reference terminal unit determine from The terminal type of body is one or more that non-reference terminal unit is following manner：

Or,

4. the method as described in claim 1,2 or 3, it is characterised in that if reference terminal equipment is Multiple, non-reference terminal unit chooses a reference terminal equipment, including：

5. method as claimed in claim 4, it is characterised in that non-reference terminal unit chooses similarity A high reference terminal equipment, including：

6. the method as described in claim 1,2 or 3, it is characterised in that if reference terminal equipment is One, non-reference terminal unit chooses a reference terminal equipment, including：

Non-reference terminal unit directly chooses one reference terminal equipment.

7. the method as described in claim 1,2 or 3, it is characterised in that non-reference terminal unit will be with One kind in lower two kinds of information is all reported to network side：The channel condition information of itself and the reference chosen The difference of the channel condition information of terminal unit, and, the mark of the reference terminal equipment of selection, including：

8. the method as described in claim 1,2 or 3, it is characterised in that non-reference terminal unit will be with One kind in lower two kinds of information is all reported to network side：The channel condition information of itself and the reference chosen The difference of the channel condition information of terminal unit, and, the mark of the terminal unit of selection, including：

9. the method as described in claim 1,2 or 3, it is characterised in that further include：

10. the method as described in claim 1,2 or 3, it is characterised in that the channel condition information Including at least channel quality information CQI；Or, the channel condition information includes at least CQI and precoding Matrix indicates PMI.

A kind of 11. methods of feeding back channel state information, it is characterised in that include：

12. methods as claimed in claim 11, it is characterised in that reference terminal equipment is according to network side The 3rd descending pilot frequency for sending carries out before channel measurement obtains the channel condition information of itself, further wrapping Include；

13. methods as claimed in claim 12, it is characterised in that the reference terminal equipment determines certainly The terminal type of body is one or more that reference terminal equipment is following manner：

Or,

14. methods as described in claim 11,12 or 13, it is characterised in that further include：

15. methods as claimed in claim 14, it is characterised in that the channel condition information is at least wrapped CQI containing channel quality information；Or, the channel condition information includes at least CQI and pre-coding matrix refers to Show PMI.

16. a kind of equipment of feeding back channel state information, it is characterised in that include：

17. equipment as claimed in claim 16, it is characterised in that receptor receives reference terminal equipment Before the channel condition information of transmission, processor is further used for：The terminal type of the equipment is determined for non- Reference terminal equipment.

18. equipment as claimed in claim 17, it is characterised in that processor determines the end of the equipment End type is one or more that non-reference terminal unit is following manner：

Or,

19. equipment as described in claim 16,17 or 18, it is characterised in that if reference terminal sets Standby is multiple, processor one reference terminal equipment of selection, including：

Processor chooses a high reference terminal equipment of similarity.

20. equipment as claimed in claim 19, it is characterised in that processor chooses high one of similarity Individual reference terminal equipment, including：

Processor chooses similarity one reference terminal equipment of highest.

21. equipment as described in claim 16,17 or 18, it is characterised in that if reference terminal sets Standby is one, and processor chooses a reference terminal equipment, including：

Processor directly chooses one reference terminal equipment.

22. equipment as described in claim 16,17 or 18, it is characterised in that transmitter is by following two One kind in kind of information is all reported to network side：The channel condition information of the equipment and the reference chosen The difference of the channel condition information of terminal unit, and, the mark of the reference terminal equipment of selection, including：

23. equipment as described in claim 16,17 or 18, it is characterised in that transmitter is by following two One kind in kind of information is all reported to network side：The channel condition information of the equipment and the reference chosen The difference of the channel condition information of terminal unit, and, the mark of the terminal unit of selection, including：

24. equipment as described in claim 16,17 or 18, it is characterised in that processor is further used In：

The transmitter is further used for：

25. equipment as described in claim 16,17 or 18, it is characterised in that the channel status letter Breath is including at least channel quality information CQI；Or, the channel condition information is including at least CQI and prelists Code matrix indicates PMI.

26. a kind of equipment of feeding back channel state information, it is characterised in that include：

27. equipment as claimed in claim 26, it is characterised in that processor is sent according to network side 3rd descending pilot frequency carries out before channel measurement obtains the channel condition information of itself, being further used for；

28. equipment as claimed in claim 27, it is characterised in that processor determines the end of the equipment End type is one or more that reference terminal equipment is following manner：

Or,

29. equipment as described in claim 26,27 or 28, it is characterised in that further include：

Processor is further used for：

Transmitter is further used for：

30. equipment as claimed in claim 29, it is characterised in that the channel condition information is at least wrapped CQI containing channel quality information；Or, the channel condition information includes at least CQI and pre-coding matrix refers to Show PMI.