CN102271401B - Channel state information receiving method, device and system - Google Patents
Channel state information receiving method, device and system Download PDFInfo
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Abstract
The embodiment of the invention discloses a channel state information receiving method, a channel state information receiving device and a channel state information receiving system. The method comprises the following steps of: allocating a channel state information feedback particle size to user equipment, wherein the feedback particle size comprises a band part (BP) with a length greater than that of a sub-band (SB); and receiving channel state information fed back by the user equipment, wherein the channel state information is obtained according to the feedback particle size. By the technology provided by the embodiment of the invention, the channel state information bit overhead of the component aggregation user equipment in a long term evolution (LTE) system on an LTE-advanced (LTE-A) system can be reduced.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method of reseptance, device and system of channel condition information.
Background technology
At the uplink direction of wireless communication system, subscriber equipment need to be to base station feedback channel quality indication (Channel Quality Indication, CQI) information.The CQI information that feed back by subscriber equipment the base station can be known the downlink channel quality situation of subscriber equipment institute perception, carries out frequency selective scheduling to help the base station.CQI information is essential for link adaptation techniques.
3GPP evolution whole world terrestrial wireless access (Evolved Universal Terrestrial Radio Access, E-UTRA) system also claims Long Term Evolution (Long Term Evolution, LTE) system, the down link direction has adopted OFDM multiplex technique and multiple-input and multiple-output (Multiple Input Multiple Output, MIMO) technology to improve descending peak data rate in this system.For supporting the MIMO technology, except CQI information, subscriber equipment also needs to base station feedback channel sequence indication (Rank Indication, RI) information and pre-coding matrix indication (Precoding Matrix Indicator, PMI) information.The RI of subscriber equipment, CQI and PMI information exchange are crossed Physical Uplink Control Channel (Physical Uplink Control Channel, PUCCH) or Physical Uplink Shared Channel (Physical Uplink Shared Channel, PUSCH) to base station feedback.RI, CQI and PMI information are periodic feedback on PUCCH, trigger feedback by the order of physical layer uplink scheduling authorization on PUSCH, for convenience of description, RI, CQI and PMI information are referred to as channel condition information.
At senior Long Term Evolution (Long Term Evolution-Advanced, LTE-A) in system, carrier aggregation (Carrier Aggregation, CA) technology is selected to support wider bandwidth, with satisfy International Telecommunications Union for the 4th generation the communication technology the peak data rate requirement.In carrier aggregation, two or more member carriers (Component Carrier, CC) frequency spectrum is grouped together in together to obtain wider transmission bandwidth, it is compatible that wherein each member carrier can be configured to the LTE system, and the frequency spectrum of each member carrier can be adjacent continuous frequency spectrum, also can be non-conterminous frequency spectrum in identical frequency band or even the discontinuous spectrum in different frequency bands; The LTE subscriber equipment can only access one of them member carrier and carry out data transmit-receive, carries out data transmit-receive and the LTE-A subscriber equipment can access a plurality of member carriers simultaneously according to its ability and business demand.Carrier aggregation technology also is spectrum aggregating (Spectrum Aggregation, SA) technology sometimes, perhaps bandwidth expansion (Bandwidth Extension, BE) technology.In carrier aggregation technology, each member carrier has independently HARQ process, and can configure different uplink and downlink member carrier numbers for the LTE-A subscriber equipment.
When subscriber equipment accesses a plurality of member carrier downlink data receiving simultaneously, need to feed back its channel condition information at uplink direction to each member carrier.Identical with the LTE system, in the LTE-A system, channel condition information can feed back on the PUCCH channel, also can feed back on the PUSCH channel.The overhead bit of considering channel condition information is linear growth with the growth of member carrier number, and when subscriber equipment polymerization member carrier number was more, the channel condition information of a plurality of member carriers of feedback can cause very large channel condition information overhead bit.
Summary of the invention
For solving problems of the prior art, embodiments of the invention provide a kind of method of reseptance, device and system of channel condition information.
For solving problems of the prior art, embodiments of the invention provide a kind of feedback method, device and system of channel condition information.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of method of reseptance of channel condition information comprises the steps: to be user equipment allocation information feedback granularity that wherein this feedback granularity comprises frequency band segment BP, and the length of this BP is greater than the length of subband SB; Receive the channel condition information of subscriber equipment feedback, wherein channel condition information is that subscriber equipment obtains according to this feedback granularity.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of feedback method of channel condition information comprises the steps: to receive the information feedback granularity of base station assigns, and wherein this feedback granularity comprises frequency band segment BP, and the length of this BP is greater than the length of subband SB; Obtain channel condition information according to this feedback granularity; With this information feedback to the base station.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of receiving system of channel condition information, this device comprises: allocation units, be used to user equipment allocation information feedback granularity, wherein this feedback granularity comprises frequency band segment BP, and the length of this BP is greater than the length of subband SB; Receiving element is used for receiving the channel condition information that subscriber equipment feeds back, and wherein channel condition information obtains according to this feedback granularity.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of feedback device of channel condition information, this device comprises: receiving element, for the information feedback granularity that receives base station assigns, wherein this feedback granularity comprises frequency band segment BP, and the length of this BP is greater than the length of subband SB; Acquiring unit is used for obtaining channel condition information according to the feedback granularity; Feedback unit is used for this information feedback to the base station.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of communication system, this system comprises base station and subscriber equipment, and wherein this base station is used to user equipment allocation information feedback granularity, and receives the channel condition information of subscriber equipment feedback, wherein this feedback granularity comprises frequency band segment BP, and the length of this BP is greater than the length of subband SB; This subscriber equipment be used for to receive the information feedback granularity of base station assigns, obtains channel condition information according to this feedback granularity, and with this information feedback to the base station.
In embodiments of the present invention, to be user equipment allocation length come feeding back channel state information greater than the BP of the length of subband SB in the base station; So can reduce the channel condition information overhead bit of the carrier aggregation subscriber equipment in LTE system or LTE-A system.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is embodiment of the present invention channel condition information method of reseptance schematic diagram;
Fig. 2 is that BP and the SB of 10MHz LTE system in the embodiment of the present invention divides schematic diagram;
Fig. 3 is that the embodiment of the present invention is selected CQI feedback cycle parameters relationship schematic diagram frequently;
Fig. 4 is the schematic diagram that in embodiment of the present invention LTE system, subscriber equipment uses the BP feeding back channel state information;
Fig. 5 is the schematic diagram that the whole member carriers of embodiment of the present invention LTE-A system carrier aggregation subscriber equipment use the BP feeding back channel state information;
Fig. 6 is that embodiment of the present invention LTE-A system carrier aggregation subscriber equipment carries the schematic diagram that the part member carrier uses SB, part member carrier use BP feeding back channel state information;
Fig. 7 is embodiment of the present invention channel state information feedback method schematic diagram;
Fig. 8 is embodiment of the present invention channel condition information receiving system structural representation;
Fig. 9 is embodiment of the present invention information feedback apparatus structure schematic diagram.
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 clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The method of reseptance of a kind of channel condition information that one embodiment of the invention provides, referring to Fig. 1, described method comprises:
Wherein this BP and SB divide according to system bandwidth or the Measurement bandwidth of carrier wave.Particularly, to each member carrier of subscriber equipment access, the concrete size of this SB and BP can be determined by system bandwidth or the Measurement bandwidth of member carrier.Measurement bandwidth refers to that subscriber equipment needs to measure and the bandwidth of feeding back channel state information on a member carrier, can equal the system bandwidth of this member carrier or the part of this member carrier system bandwidth.
Be wherein user equipment allocation information feedback granularity, specifically comprise: if this subscriber equipment is in non-carrier aggregation mode, for the feedback granularity of user equipment allocation is BP; If perhaps this subscriber equipment is in carrier aggregation mode, the feedback granularity of distributing at least one member carrier wherein is BP.Wherein at least one member carrier feedback granularity of distributing is that BP specifically comprises: when the member carrier number in member's carrier set during greater than a threshold value, the feedback granularity of distributing at least one member carrier wherein is BP; Or when the member carrier number that is in state of activation in member's carrier set during greater than a threshold value, the feedback granularity of distributing at least one member carrier wherein is BP.
Wherein in step 102, channel condition information is to obtain specifically to comprise according to feeding back granularity: the channel condition of the BP that relatively distributes obtains the channel status indication information of the best BP of channel condition, obtains described channel condition information according to the channel status indication information of best BP and the position indication of the best BP of correspondence.
Wherein also comprised before step 102: by RRC signaling or MAC signaling or physical layer signaling, the information feedback granularity of distributing is notified to subscriber equipment.
In embodiments of the present invention, to be user equipment allocation length come feeding back channel state information greater than the BP of the length of subband SB in the base station; So can reduce the channel condition information overhead bit of the carrier aggregation subscriber equipment in LTE system or LTE-A system.In addition, for best BP feedback, its CQI information bit consists of similar to the subband CQI information bit formation of each BP, and preferably the indication of the position of BP is also identical with the bit number of the preferably position indication of SB, thereby has backwards compatibility preferably.
Below take base station side as example, specifically describe a kind of method of reseptance of channel condition information.In the LTE system, there are two large class information feedback modes, one type is the cycle information feedback, another kind of type is information feedback aperiodic.For the LTE-A system, this information feedback mode of two types also can exist.The aperiodic channel status information feedback can only be passed through the PUSCH channel feedback, is all base station scheduling at every turn, and overhead bit is not major consideration.Mainly by the PUCCH channel feedback, the base station is can not change for a long time after user device configuration to the cycle information feedback, for feedback performance reliably is provided enough, needs to consider the overhead bit of channel condition information.Thereby the embodiment of the present invention is mainly with the cycle information feedback, particularly frequently select CQI to be fed back to example, but its principle also is suitable for for the aperiodic channel status information feedback.For example for the aperiodic channel status information feedback, when using the BP feedback on a member carrier when distributing user equipment, subscriber equipment can comprise the channel status indication information of each BP in each aperiodic channel status information feedback.
The LTE system is a single-carrier system, only comprises a member carrier.Subscriber equipment carries out channel condition information and measures and feed back according to the feedback granularity of a channel condition information of system bandwidth automatic acquisition of this member carrier.As shown in Figure 2, in the LTE system, need to be to whole system bandwidth feedback RI, CQI and PMI channel condition information.In frequently selecting the CQI feedback procedure, system bandwidth is divided into several frequency band segments BP, each BP is comprised of several continuous subband SB, and each SB is comprised of several continuous Physical Resource Block (Physical Resource Block, PRB).Each BP takies different subband CQI information feedbacks constantly successively.The LTE system of Fig. 2 take bandwidth as 10MHz is example, provided the division schematic diagram of BP and SB, and it is comprised of 50 PRB, and every 6 continuous P RB form a SB, and every 3 continuous SB form a BP.Wherein, can not being divided exactly by 6 due to 50, last SB, is that the PRB number that SB8 comprises is not 6, but 50 divided by the remainder 2 after 6.
If the feedback granularity of LTE system channel state information is SB, frequently to select CQI as example, concrete frequency selects CQI feedback cycle parameters relationship as shown in Figure 3, and system bandwidth is divided into 3 BP, and the subband CQI information of BP0, BP1 and BP2 is fed back constantly in corresponding subband CQI information feedback respectively.Its intermediate frequency selects the CQI feedback to comprise following five cycle parameter: Np, represents the cycle of adjacent twice CQI information feedback, and one time CQI information feedback can be a broadband CQI information feedback, can be also a CQI information feedback of certain part subband; NOFFSET_CQI is engraved in the time offset in one-period during expression CQI information feedback; K is illustrated in the circulation of having experienced K subband CQI information between twice adjacent broadband CQI information feedback and feeds back; MRI, the feedback cycle of expression RI information are MRI times of broadband CQI feedback cycle; NOFFSET_RI, expression RI information feedback is constantly with respect to broadband CQI information feedback time offset constantly.Wherein in Fig. 3, RI represents RI information feedback constantly, and WB represents broadband CQI information feedback constantly, and BP0～BP2 represents subband CQI information feedback constantly.If feedback PMI information, PMI information is followed broadband CQI information and is fed back together so.
Be in closed loop space division multiplexing transmission mode as example take subscriber equipment, the channel condition information that reports can comprise CQI, RI and PMI information.Do not consider the overhead bit of RI and PMI information, the simple overhead bit of considering CQI information, one time broadband CQI information reporting needs 7 bits (3 bit differential CQI information of 4 bit CQI information+second code words of the first code word), and the subband CQI information reporting of each BP needs 9 bits (the position indications of 3 bit differential CQI information of 4 bit CQI information+second code words of the first code word+2 best SB of bit).Obtain the complete channel condition information of a 10MHz member carrier, the CQI information bit that needs is 7+9*3=34.Yet, in the LTE system, the cycle channel condition information mainly transmits by the PUCCH channel, a PUCCH channel last time can only be transmitted the channel condition information of 11 bits at most, if therefore the feedback granularity of LTE system channel state information is SB, the channel condition information overhead bit of subscriber equipment is very large.Especially, in the LTE-A system, when the member carrier number of subscriber equipment access is many, if each member carrier is come feeding back channel state information in the manner described above, so needed channel condition information bit number can linearity increase along with the increase of member carrier number, introduces larger overhead bit.
The embodiment of the present invention increases by one second feedback granularity of definition in order to reduce the channel condition information overhead bit, and definition the first feedback granularity is feedback take SB as granularity, and compared to the first feedback granularity, the second feedback granularity is the larger feedback granularity of bandwidth length.In order to allow two kinds of feedback granularities coexist better, preferably the second feedback granularity is consisted of take the first feedback granularity as unit, for example the second feedback granularity is feedback take BP as granularity.In embodiments of the present invention when distributing the second feedback granularity BP, in the channel condition information of feedback, comprise best BP feedback, once preferably the BP feedback is made of the channel status indication information of the best BP of at least one channel condition and the position indication of corresponding preferably BP, concrete obtain manner is: the channel condition of the BP that relatively distributes obtains the channel status indication information of the best BP of channel condition, obtains described channel condition information according to the channel status indication information of best BP and the position indication of the best BP of correspondence.When having distributed the first feedback granularity, in the channel condition information of feedback, comprise the best SB feedback to each BP, once preferably the SB feedback is made of the channel status indication information of the best SB of at least one channel condition and the position indication of corresponding preferably SB.Wherein specifically comparison procedure is: the channel condition that compares the SB that distributes in BP obtains the channel status indication information of the best SB of channel condition, obtains described channel condition information according to the channel status indication information of best SB and the position indication of the best SB of correspondence.In addition, to each member carrier, in the channel condition information of feedback, also comprise the WB feedback, the WB feedback is made of the broad-band channel state information of wanting whole bandwidth of measure channel state information to generate at this member carrier based on subscriber equipment.
For the LTE system, the feedback granularity of embodiment of the present invention channel condition information adopts BP, and wherein the length of BP is greater than the length of subband SB, and concrete, take Fig. 2 as example, the length of BP can 3 SB be that unit consists of.BP and SB with 10MHz LTE system in Fig. 2 are divided into example, concrete frequency selects CQI feedback cycle parameters relationship as shown in Figure 4, comprise following five cycle parameter: Np, the cycle that represents adjacent twice CQI information feedback, one time CQI information feedback can be a broadband CQI information feedback, can be also once best BP feedback; NOFFSET_CQI is engraved in the time offset in one-period during expression CQI information feedback; K is illustrated between twice adjacent broadband CQI information feedback and has experienced best BP feedback K time; MRI, the feedback cycle of expression RI information are MRI times of broadband CQI feedback cycle; NOFFSET_RI, expression RI information feedback is constantly with respect to broadband CQI information feedback time offset constantly.Particularly, the base station configures the moment of subscriber equipment RI feedback, WB feedback and best BP feedback in advance by above-mentioned five cycle parameters of notice, receive the RI information of subscriber equipment feedback in the moment of RI feedback, receive the broad-band channel state information of subscriber equipment feedback in the moment of WB feedback, receive the best BP channel status indication information of subscriber equipment feedback and the preferably position of BP indication accordingly in the moment of best BP feedback.The simple overhead bit of considering CQI information, one time broadband CQI information reporting needs 7 bits (3 bit differential CQI information of 4 bit CQI information+second code words of the first code word), and once preferably the CQI information reporting of BP feedback needs 9 bits (the position indications of 3 bit differential CQI information of 4 bit CQI information+second code words of the first code word+2 best SB of bit).Obtain the complete channel condition information of a 10MHz member carrier, the CQI information bit that needs is 7+9=16.Than the feedback of channel condition information take the feedback granularity as SB, the expense of CQI information bit has reduced (34-16)/34=52.94%.
In the LTE-A system, for the subscriber equipment that is in carrier aggregation mode in the LTE-A system, if adopt BP and the SB dividing mode of Fig. 2, the information feedback that the embodiment of the present invention is concrete comprises following several: the first: to the subscriber equipment of carrier aggregation, can distribute its whole member carriers all to use the BP feeding back channel state information, with the needed overhead bit of minimum feedback channel condition information.Take channel condition information by RI, CQI and PMI information structure as example, particularly, the base station configures the moment of subscriber equipment RI feedback, WB feedback and best BP feedback in advance, receive the RI information of subscriber equipment feedback in the moment of RI feedback, receive the broad-band channel state information of subscriber equipment feedback in the moment of WB feedback, receive the best BP channel status indication information of subscriber equipment feedback and the preferably position of BP indication accordingly in the moment of best BP feedback.
As shown in Figure 5, if the subscriber equipment polymerization member carrier 1 and member carrier 2, distribute member carrier 1 and member carrier 2 all to use the BP feeding back channel state information.The bandwidth of supposing two member carriers is all 10MHz, when using the BP feeding back channel state information, the complete channel condition information of a 10MHz member carrier has comprised 16 bit CQI information, to obtain so the complete channel condition information of all member carriers, need the CQI information of 16*2=32 bit.If use the SB feeding back channel state information, obtain the complete channel condition information of all member carriers, need the CQI information of 34*2=68 bit.Use the present invention program, the expense of CQI information bit has reduced (68-32)/68=52.94%.
The second, although use BP can significantly reduce the needed overhead bit of feeding back channel state information, the overhead bit that reduces feeding back channel state information also can reduce the user's equipment downward throughput.In order to reach a reasonable compromise between the overhead bit of channel condition information and downlink throughput capacity, for a subscriber equipment that is in carrier aggregation mode, can use the SB feeding back channel state information by the distribution portion member carrier, distribute all the other member carriers to use the BP feeding back channel state information.
As shown in Figure 6, the subscriber equipment polymerization member carrier 1 and member carrier 2, distribute member carrier 1 to use the BP feeding back channel state information, distribute member carrier 2 to use the SB feeding back channel state informations.with channel condition information by RI, CQI and PMI information structure are example, member carrier 1 to the subscriber equipment access, when having distributed the second feedback granularity BP, can be as shown in member carrier in Fig. 61 at the information feedback on this member carrier, particularly, the base station configures subscriber equipment RI feedback in advance, the moment of WB feedback and best BP feedback, receive the RI information of subscriber equipment feedback in the moment of RI feedback, receive the broad-band channel state information of subscriber equipment feedback in the moment of WB feedback, receive the best BP channel status indication information of subscriber equipment feedback and the preferably position of BP indication accordingly in the moment of best BP feedback, when being member carrier 2 distribution the first feedback granularity SB, can be as shown in the member carrier 2 in Fig. 6 at the information feedback on this member carrier, particularly, the base station configures the moment of subscriber equipment RI feedback, WB feedback and each BP feedback in advance, receive the RI information of subscriber equipment feedback in the moment of RI feedback, in the broad-band channel state information of the moment of WB feedback reception subscriber equipment feedback, the position indication of the channel status indication information of best SB and corresponding best SB in this BP of the moment of each BP feedback reception subscriber equipment feedback.
The bandwidth of supposing two member carriers is all 10MHz, use the complete channel condition information of the member carrier of BP feeding back channel state information to comprise 16 bit CQI information, use the complete channel condition information of the member carrier of SB feeding back channel state information to comprise 34 bit CQI information, to obtain so the complete channel condition information of all member carriers, need the CQI information of 16+34=50 bit.If two member carriers all use the SB feeding back channel state information, obtain the complete channel condition information of all member carriers, need the CQI information of 34*2=68 bit.Use the present invention program, the expense of CQI information bit has reduced (68-50)/68=26.47%.
The third to being in the subscriber equipment of carrier aggregation mode, when the member carrier number in member's carrier set during greater than a threshold value, being at least wherein the part member carrier or automatically distributing the BP feeding back channel state informations for whole member carriers; Or when the member carrier number that is in state of activation in member's carrier set during greater than a threshold value, for example 3, be at least wherein the part member carrier or automatically distribute the BP feeding back channel state informations for whole member carriers.When being automatically whole member carriers distribution BP feeding back channel state information, the base station only needs the member carrier number of notifying user equipment configuration or the member carrier number of activation, and not need to come notifying user equipment by signaling be the information feedback granularity that member carrier distributes.For example, the subscriber equipment polymerization 3 member carriers that bandwidth is 10MHz, be designated as member carrier 1, member carrier 2 and member carrier 3.Distribute member carrier 1 and member carrier 2 to use the BP feeding back channel state information, distribute member carrier 3 to use the SB feeding back channel state information, will obtain so the complete channel condition information of all member carriers, need the CQI information of 16*2+34=66 bit.If all member carriers all use the SB feeding back channel state information, to obtain so the complete channel condition information of all member carriers, need the CQI information of 34*3=102 bit.Use the present invention program, the expense of CQI information bit has reduced (102-66)/102=35.29%.
above-mentioned three kinds of modes just illustrate, for the LTE-A system, the embodiment of the present invention specifically is not limited to above-mentioned three kinds of modes to its channel condition information of base station feedback, so long as the length of feedback granularity can reduce the overhead bit of information feedback greater than the scheme of the length of subband SB, and adopt the feedback granularity to comprise that BP obtains channel condition information in above-described embodiment, not only can reduce the channel condition information overhead bit of subscriber equipment, simultaneously because the subband CQI information in the LTE system is the best SB channel condition information that reports in each BP, introduce and still can guarantee that LTE system and LTE-A system have compatible preferably after new feedback granularity BP.
For the subscriber equipment that is in carrier aggregation mode, can access simultaneously a plurality of member carrier downlink data receivings.Each member carrier to access all needs to its channel condition information of base station feedback.In order to reduce the carrier aggregation mode subscriber equipment, particularly accessed simultaneously the channel condition information overhead bit of the subscriber equipment of more member carrier,
In the LTE-A system, to being in the subscriber equipment of carrier aggregation mode, the base station is controlled (Radio Resource Control, RRC) signaling by Radio Resource and is notified a member carrier collection for it, has wherein provided the member carrier that subscriber equipment might access.The base station can also pass through that medium access control (Medium Access Control, MAC) signaling activates or the deexcitation member carrier collection in member carrier.By RRC signaling or MAC signaling or physical layer signaling, the information feedback granularity of distributing is notified to subscriber equipment.For example, by in RRC signaling member carrier collection, notify the feedback granularity of distributing; Perhaps in the member carrier in activating member carrier collection by the MAC signaling, notify the feedback granularity of distributing.For a plurality of member carriers of a subscriber equipment, can notify a common feedback granularity, perhaps notify a feedback granularity for each member carrier.
The embodiment of the present invention provides a kind of feedback method of channel condition information, as shown in Figure 7, specifically comprises the steps:
Wherein receive the information feedback granularity of base station assigns, specifically comprise: if subscriber equipment is in non-carrier aggregation mode, the feedback granularity that receives base station assigns is BP; For example, the feedback granularity of LTE system channel state information adopts BP, and specifically please refer to Fig. 2 and Fig. 4 is example, no longer describes in detail herein, than the feedback of channel condition information take the feedback granularity as SB, the expense of CQI information bit has reduced (34-16)/34=52.94%.
If perhaps subscriber equipment is in carrier aggregation mode, wherein the feedback granularity of at least one member carrier reception base station assigns is BP.For example, in the LTE-A system, for the subscriber equipment that is in carrier aggregation mode in the LTE-A system, concrete information feedback comprises following several:
The first: to the subscriber equipment of carrier aggregation, can distribute its whole member carriers all to use the BP feeding back channel state information, with the needed overhead bit of minimum feedback channel condition information.Specifically please refer to Fig. 2 and Fig. 5, no longer describe in detail herein;
The second, in order to reach a reasonable compromise between the overhead bit of channel condition information and downlink throughput capacity, for a subscriber equipment that is in carrier aggregation mode, can use the SB feeding back channel state information by the distribution portion member carrier, distribute all the other member carriers to use the BP feeding back channel state information.Specifically please see Figure 2 and Fig. 6, no longer describe in detail herein.
The third: to being in the subscriber equipment of carrier aggregation mode, when the member carrier number in member's carrier set during greater than a threshold value, being at least wherein the part member carrier or automatically distributing the BP feeding back channel state informations for whole member carriers; Or when the member carrier number that is in state of activation in member's carrier set during greater than a threshold value, for example 3, be at least wherein the part member carrier or automatically distribute the BP feeding back channel state informations for whole member carriers.When being automatically whole member carriers distribution BP feeding back channel state information, the base station only needs the member carrier number of notifying user equipment configuration or the member carrier number of activation, and not need to come notifying user equipment by signaling be the information feedback granularity that member carrier distributes.For example, the subscriber equipment polymerization 3 member carriers that bandwidth is 10MHz, be designated as member carrier 1, member carrier 2 and member carrier 3.Distribute member carrier 1 and member carrier 2 to use the BP feeding back channel state information, distribute member carrier 3 to use the SB feeding back channel state information, will obtain so the complete channel condition information of all member carriers, need the CQI information of 16*2+34=66 bit.If all member carriers all use the SB feeding back channel state information, to obtain so the complete channel condition information of all member carriers, need the CQI information of 34*3=102 bit.Use the present invention program, the expense of CQI information bit has reduced (102-66)/102=35.29%.
Step 702 is obtained channel condition information according to this feedback granularity;
Obtaining channel condition information according to this feedback granularity specifically comprises: the channel condition of the BP that relatively distributes obtains the channel status indication information of the best BP of channel condition, obtains this channel condition information according to the channel status indication information of best BP and the position indication of the best BP of correspondence.Specifically please refer to Fig. 2 to Fig. 6, no longer describe in detail herein.
The embodiment of the present invention provides a kind of receiving system of channel condition information, and as shown in Figure 8, receiving system 80 specifically comprises as lower unit:
Allocation units 81 are used to user equipment allocation information feedback granularity, and wherein this feedback granularity comprises frequency band segment BP, and the length of this BP is greater than the length of subband SB;
If this subscriber equipment is in non-carrier aggregation mode, these allocation units 81 are BP for the feedback granularity of user equipment allocation; For example, the feedback granularity of LTE system channel state information adopts BP, and specifically please refer to Fig. 2 and Fig. 4 is example, no longer describes in detail herein, than the feedback of channel condition information take the feedback granularity as SB, the expense of CQI information bit has reduced (34-16)/34=52.94%.
If perhaps described subscriber equipment is in carrier aggregation mode, described allocation units 81 are BP for the feedback granularity of wherein at least one member carrier distribution.For example, in the LTE-A system, for the subscriber equipment that is in carrier aggregation mode in the LTE-A system, concrete information feedback comprises following several:
The first: to the subscriber equipment of carrier aggregation, can distribute its whole member carriers all to use the BP feeding back channel state information, with the needed overhead bit of minimum feedback channel condition information.Specifically please refer to Fig. 2 and Fig. 5, no longer describe in detail herein;
The second, in order to reach a reasonable compromise between the overhead bit of channel condition information and downlink throughput capacity, for a subscriber equipment that is in carrier aggregation mode, can use the SB feeding back channel state information by the distribution portion member carrier, distribute all the other member carriers to use the BP feeding back channel state information.Specifically please see Figure 2 and Fig. 6, no longer describe in detail herein.
The third: to being in the subscriber equipment of carrier aggregation mode, when the member carrier number in member's carrier set during greater than a threshold value, being at least wherein the part member carrier or automatically distributing the BP feeding back channel state informations for whole member carriers; Or when the member carrier number that is in state of activation in member's carrier set during greater than a threshold value, for example 3, concrete scheme is above-mentioned to be discussed in detail, repeats no more herein.
Receiving element 82 is used for receiving the channel condition information that subscriber equipment feeds back, and wherein channel condition information obtains according to this feedback granularity.
Embodiments of the invention provide a kind of feedback device of channel condition information, please refer to Fig. 9, and this device 90 comprises:
Receiving element 91, for the information feedback granularity that receives base station assigns, wherein this feedback granularity comprises frequency band segment BP, and the length of this BP is greater than the length of subband SB;
If wherein subscriber equipment is in non-carrier aggregation mode, the feedback granularity that described receiving element receives base station assigns is BP; Specifically please refer to the specific descriptions of Fig. 2 and Fig. 4 and corresponding embodiment, repeat no more herein.Perhaps
If subscriber equipment is in carrier aggregation mode, described receiving element receives the base station for the feedback granularity that at least one member carrier wherein distributes is BP, specifically please refer to the specific descriptions of Fig. 2 and Fig. 5, Fig. 6 and corresponding embodiment, repeats no more herein.
Acquiring unit 92 is used for obtaining channel condition information according to the feedback granularity;
Wherein this acquiring unit specifically comprises:
Comparing unit is used for the relatively channel status indication information of the best BP of channel condition acquisition channel condition of the BP of distribution, specifically please refer to Fig. 2, Fig. 5, Fig. 6 and corresponding embodiment and describes, and repeats no more herein.
The channel condition information acquiring unit is used for according to preferably the channel status indication information of BP and the position indication of the best BP of correspondence obtain described channel condition information.Specifically please refer to Fig. 2, Fig. 5, Fig. 6 and corresponding embodiment and describe, repeat no more herein.
Feedback unit 93 is used for this information feedback to the base station.
A kind of communication system of embodiments of the invention, this system comprises base station and subscriber equipment, wherein this base station is used to user equipment allocation information feedback granularity, and the channel condition information of reception subscriber equipment feedback, wherein this feedback granularity comprises frequency band segment BP, and the length of this BP is greater than the length of subband SB; This subscriber equipment be used for to receive the information feedback granularity of base station assigns, obtains channel condition information according to this feedback granularity, and with this information feedback to the base station.Specifically please refer to Fig. 2, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9 and corresponding embodiment and describe, repeat no more herein.
Those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can software product form embody, this computer software product can be stored in storage medium, as ROM/RAM, magnetic disc, CD etc., comprise that some instructions are with so that a computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of some part of each embodiment of the present invention or embodiment.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement are within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (11)
1. the method for reseptance of a channel condition information, is characterized in that, described method comprises:
Be user equipment allocation information feedback granularity, wherein said feedback granularity comprises frequency band segment BP, and the length of described BP is greater than the length of subband SB;
Receive the channel condition information of subscriber equipment feedback, wherein said channel condition information is that subscriber equipment obtains according to described feedback granularity;
Wherein, described is user equipment allocation information feedback granularity, specifically comprises: if described subscriber equipment is in non-carrier aggregation mode, for the feedback granularity of user equipment allocation is BP; Perhaps, if described subscriber equipment is in carrier aggregation mode, the feedback granularity of distributing at least one member carrier wherein is BP.
2. method according to claim 1, is characterized in that, wherein said BP and SB divide according to the system bandwidth of carrier wave or Measurement bandwidth.
3. method according to claim 1, is characterized in that, described feedback granularity for wherein at least one member carrier distribution is that BP specifically comprises:
When the member carrier number in member's carrier set during greater than a threshold value, the feedback granularity of distributing at least one member carrier wherein is BP; Or
When the member carrier number that is in state of activation in member's carrier set during greater than a threshold value, the feedback granularity of distributing at least one member carrier wherein is BP.
4. method according to claim 1, is characterized in that, also comprises before the channel condition information of described reception subscriber equipment feedback:
By RRC signaling or MAC signaling or physical layer signaling, the information feedback granularity of distributing is notified to subscriber equipment.
5. the described method of according to claim 1 to 4 any one, is characterized in that, described channel condition information is that subscriber equipment obtains specifically to comprise according to described feedback granularity:
The channel condition of the BP that relatively distributes obtains the channel status indication information of the best BP of channel condition, obtains described channel condition information according to the channel status indication information of best BP and the position indication of the best BP of correspondence.
6. the feedback method of a channel condition information, is characterized in that, described method comprises:
Receive the information feedback granularity of base station assigns, wherein said feedback granularity comprises frequency band segment BP, and the length of described BP is greater than the length of subband SB;
Obtain channel condition information according to described feedback granularity;
With described information feedback to the base station.
Wherein, the information feedback granularity of described reception base station assigns specifically comprises: if subscriber equipment is in non-carrier aggregation mode, the feedback granularity that receives base station assigns is BP; Perhaps, if subscriber equipment is in carrier aggregation mode, wherein the feedback granularity of at least one member carrier reception base station assigns is BP.
7. method according to claim 6, is characterized in that, obtains channel condition information according to described feedback granularity and specifically comprise:
The channel condition of the BP that relatively distributes obtains the channel status indication information of the best BP of channel condition, obtains described channel condition information according to the channel status indication information of best BP and the position indication of the best BP of correspondence.
8. the receiving system of a channel condition information, is characterized in that, described device comprises:
Allocation units are used to user equipment allocation information feedback granularity, and wherein said feedback granularity comprises frequency band segment BP, and the length of described BP is greater than the length of subband SB;
Receiving element is used for receiving the channel condition information that subscriber equipment feeds back, and wherein said channel condition information obtains according to described feedback granularity;
Wherein, described allocation units specifically are used for when described subscriber equipment is in non-carrier aggregation mode, for the feedback granularity of user equipment allocation is BP; Perhaps when described subscriber equipment is in carrier aggregation mode, the feedback granularity of distributing at least one member carrier wherein is BP.
9. the feedback device of a channel condition information, is characterized in that, described device comprises:
Receiving element, for the information feedback granularity that receives base station assigns, wherein said feedback granularity comprises frequency band segment BP, and the length of described BP is greater than the length of subband SB;
Acquiring unit is used for obtaining channel condition information according to described feedback granularity;
Feedback unit is used for described information feedback to the base station;
Wherein, described receiving element specifically is used for when subscriber equipment is in non-carrier aggregation mode, and the feedback granularity that receives base station assigns is BP; Perhaps when subscriber equipment is in carrier aggregation mode, receiving the base station is BP for the feedback granularity that at least one member carrier wherein distributes.
10. device according to claim 9, is characterized in that, described acquiring unit specifically comprises:
Comparing unit is used for the relatively channel status indication information of the best BP of channel condition acquisition channel condition of the BP of distribution,
The channel condition information acquiring unit is used for according to preferably the channel status indication information of BP and the position indication of the best BP of correspondence obtain described channel condition information.
11. a communication system is characterised in that described system comprises base station and subscriber equipment,
Described base station is used to user equipment allocation information feedback granularity, and receives the channel condition information of subscriber equipment feedback, and wherein said feedback granularity comprises frequency band segment BP, and the length of described BP is greater than the length of subband SB;
Described subscriber equipment be used for to receive the information feedback granularity of base station assigns, obtains channel condition information according to described feedback granularity, and with described information feedback to the base station;
Wherein, if described subscriber equipment is in non-carrier aggregation mode, for the feedback granularity of user equipment allocation is BP; Perhaps, if described subscriber equipment is in carrier aggregation mode, the feedback granularity of distributing at least one member carrier wherein is BP.
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| EP2811777B1 (en) * | 2012-01-30 | 2017-03-15 | NEC Corporation | Wireless communication system and method for controlling reporting setting |
| CN103368699B (en) * | 2012-04-01 | 2017-12-19 | 中兴通讯股份有限公司 | Channel condition information CSI feedback method and device |
| CN102638337B (en) * | 2012-04-20 | 2015-01-07 | 电信科学技术研究院 | CSI (Channel State Information) reporting control method as well as CSI reporting method and device |
| CN103780358B (en) | 2012-10-24 | 2018-08-21 | 中兴通讯股份有限公司 | A kind of method and terminal of determining channel state information |
| CN106817722B (en) * | 2015-11-30 | 2020-04-28 | 展讯通信（上海）有限公司 | User equipment and channel measuring method thereof |
| WO2018006242A1 (en) * | 2016-07-04 | 2018-01-11 | 华为技术有限公司 | Information processing method and device |
| CN107872293B (en) | 2016-09-28 | 2023-04-07 | 华为技术有限公司 | Signal transmission method and device |
| WO2019033383A1 (en) * | 2017-08-18 | 2019-02-21 | Nokia Shanghai Bell Co., Ltd. | Wideband amplitude based codebook subset restriction |
| US11140675B2 (en) * | 2018-09-27 | 2021-10-05 | Mediatek Inc. | Methods of efficient bandwidth part switching in carrier aggregation |
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