CN114142953B

CN114142953B - Channel quality measurement method, system and related equipment

Info

Publication number: CN114142953B
Application number: CN202010914400.9A
Authority: CN
Inventors: 赵晓垠; 谢伟良
Original assignee: China Telecom Corp Ltd
Current assignee: China Telecom Corp Ltd
Priority date: 2020-09-03
Filing date: 2020-09-03
Publication date: 2024-01-26
Anticipated expiration: 2040-09-03
Also published as: CN114142953A

Abstract

The invention discloses a channel quality measurement method, a system and related equipment, and relates to the technical field of mobile communication. The channel quality measurement method comprises the following steps: the base station transmits CRS on a part of sub-bands, wherein the base station is an LTE base station, a part of frequency bands of the base station and an NR base station are subjected to dynamic spectrum sharing, and a part of sub-bands are sub-bands which do not collide with NR; the base station acquires a measurement result sent by the terminal, wherein the measurement result comprises a full-band channel quality value and channel measurement information corresponding to each sub-band; the base station corrects the measurement information corresponding to the sub-band of the non-transmitted CRS by using the measurement information corresponding to the sub-band of the transmitted CRS; and the base station corrects the quality value of the full-band channel by using the measurement information corresponding to the corrected sub-band. By the embodiment of the invention, the measurement of the channel quality can be realized under the condition of solving the collision between the CRS signal and the NR.

Description

Channel quality measurement method, system and related equipment

Technical Field

The present invention relates to the field of mobile communications technologies, and in particular, to a method, a system, and a related device for measuring channel quality.

Background

At present, 5G NR (New Radio) is deployed on a high-band spectrum, but coverage of the high-band is not satisfactory, and NR is required to be deployed on a low-band as a supplement in a part of scenes. While most of the low-band spectrum is occupied by LTE (Long Term Evolution, short: long term evolution). Therefore, in the initial stage of NR deployment, the low-frequency-band NR needs to be deployed on the spectrum used by LTE, so that 4G and 5G dynamic spectrum sharing is realized. That is, in each transmission time interval (Transmission Time Interval, abbreviated as TTI) period, the ratio of spectrum occupation of PDSCH (Physical Downlink Shared Channel ) and PUSCH (Physical Uplink Shared Channel, physical uplink shared channel) of LTE and NR can be adjusted as required, and the frequency domain granularity of spectrum adjustment can reach the granularity of 1 PRB (Physical Resource Block ).

The CRS (Cell Reference Signal ) is used for downlink channel quality measurement, for example, RSRP (Reference Signal Receiving Power, reference signal received power) is obtained, and the channel quality indicator (CQI-Channel Quality Indication, abbreviated as CQI) can be estimated by using this as a parameter and reported to the base station for downlink channel estimation and scheduling. If the CRS is inaccurate in part of the frequency band, CQI estimation will be affected.

The CRS is uniformly distributed over the full frequency band. However, taking SSB (Synchronization Signal and PBCH Block, synchronization signal and physical channel block) of NR as an example, in dynamic spectrum sharing of LTE and NR, SSB and CRS generate overlapping collisions.

The current solution is to transmit the NR SSB using MBSFN (Multicast Broadcast Single Frequency Network, multicast/multicast single frequency network) subframes. MBSFN subframes do not map CRS, so SSBs of NR are not interfered by CRS when transmitted in the subframe.

Disclosure of Invention

The inventor finds that the LTE multicast is not commercially used in large scale at present after analysis, and the support degree of the terminal to the MBSFN subframe is not definite, so that the MBSFN-based method has great limitation. Further, since CRS of LTE is transmitted in the full band, but a terminal of NR does not have a capability of rate matching CRS of LTE at the access stage, overlapping collision with NR signals occurs on PRBs transmitted by CRS, and interference occurs to SSB, RMSI (Remaining minimum system information ), msg2 (Message 2, message 2), msg4 (Message 4), paging, and the like of NR.

One technical problem to be solved by the embodiment of the invention is as follows: in case CRS and NR collision is avoided, how channel quality measurements are achieved.

According to a first aspect of some embodiments of the present invention, there is provided a channel quality measurement method, comprising: a base station transmits a Cell Reference Signal (CRS) on a part of sub-bands, wherein the base station is a Long Term Evolution (LTE) base station, a part of frequency bands of the base station and a new air interface (NR) base station are subjected to dynamic spectrum sharing, and the part of sub-bands are sub-bands which do not conflict with NR; the base station acquires a measurement result sent by the terminal, wherein the measurement result comprises a full-band channel quality value and channel measurement information corresponding to each sub-band; the base station corrects the measurement information corresponding to the sub-band of the non-transmitted CRS by using the measurement information corresponding to the sub-band of the transmitted CRS; and the base station corrects the quality value of the full-band channel by using the measurement information corresponding to the corrected sub-band.

In some embodiments, correcting measurement information corresponding to subbands not transmitting CRS includes: for each sub-band of the non-transmitted CRS, the base station uses channel measurement information of the sub-band of the transmitted CRS that is nearest to the sub-band of the non-transmitted CRS as corrected channel measurement information of the sub-band of the non-transmitted CRS.

In some embodiments, the channel measurement information corresponding to each sub-band includes a channel quality estimate for each sub-band, and a difference between an actual channel quality value for each sub-band and a full-band channel quality value.

In some embodiments, the base station determines a corrected full band channel quality value based on the corrected channel quality actual value for each sub-band.

In some embodiments, the channel quality estimate for each sub-band is the sum of a full-band channel quality value and a sub-band offset, and the sub-band offset is determined from the difference between the actual channel quality value for the sub-band and the full-band channel quality value.

In some embodiments, in the case that the difference between the actual channel quality value and the full-band channel quality value of the sub-band is 0, the sub-band offset corresponding to the sub-band is 0; in the case of a difference value of 1, the sub-band offset corresponding to the sub-band is 1; when the difference is greater than or equal to 2, the sub-band offset corresponding to the sub-band is 2; and when the difference value is less than or equal to-1, the sub-band offset corresponding to the sub-band is 3.

In some embodiments, a portion of the subband is not identical to the subband involved in at least one of SSB, RMSI, msg, msg4, paging of NR.

In some embodiments, the terminal performs aperiodic reporting, and reports the measurement result by adopting a high-level configuration subband mode.

In some embodiments, the channel quality measurement method further comprises: and the base station adopts the measurement information corresponding to the corrected sub-band and the corrected full-band channel quality value to carry out downlink scheduling.

According to a second aspect of some embodiments of the present invention, there is provided a channel measurement apparatus, located at a base station, comprising: the transmission module is configured to transmit Cell Reference Signals (CRSs) on a part of sub-bands, wherein the base station is a Long Term Evolution (LTE) base station, a part of frequency bands of the base station and a new air interface (NR) base station are subjected to dynamic spectrum sharing, and the part of sub-bands are sub-bands which do not collide with NR; the acquisition module is configured to acquire a measurement result sent by the terminal, wherein the measurement result comprises a full-band channel quality value and channel measurement information corresponding to each sub-band; the sub-band correction module is configured to correct measurement information corresponding to a sub-band which does not transmit the CRS by using the measurement information corresponding to the sub-band which transmits the CRS; and a full band correction module configured to correct the full band channel quality value by the base station using the measurement information corresponding to the corrected sub-band.

According to a third aspect of some embodiments of the present invention, there is provided a channel quality measurement apparatus comprising: a memory; and a processor coupled to the memory, the processor configured to perform any of the foregoing channel quality measurement methods based on instructions stored in the memory.

According to a fourth aspect of some embodiments of the present invention, there is provided a channel quality measurement system comprising: a base station comprising any one of the aforementioned channel measurement devices; and a terminal configured to transmit a measurement result to the base station, wherein the measurement result includes a full-band channel quality value and channel measurement information corresponding to each sub-band.

According to a fifth aspect of some embodiments of the present invention, there is provided a computer-readable storage medium having stored thereon a computer program, wherein the program when executed by a processor implements any of the aforementioned channel quality measurement methods.

Some of the embodiments of the above invention have the following advantages or benefits. To avoid collisions, the base station transmits CRS on subbands that do not collide with NR. And when the measurement result of the terminal on the whole band is obtained, the base station corrects the measurement information corresponding to the sub-band which does not transmit the CRS by adopting the measurement information corresponding to the sub-band which transmits the CRS, so that the measurement result is more accurate. By the above embodiment, the measurement of the channel quality can be realized in the case of resolving the collision of the CRS signal and the NR.

Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

Fig. 1 shows a flow diagram of a channel quality measurement method according to some embodiments of the invention.

Fig. 2 illustrates a flow diagram of a measurement information correction method according to some embodiments of the invention.

Fig. 3 illustrates a schematic structure of a channel quality measurement apparatus according to some embodiments of the present invention.

Fig. 4 illustrates a schematic diagram of a channel quality measurement system according to some embodiments of the invention.

Fig. 5 is a schematic diagram showing the construction of a channel quality measuring apparatus according to other embodiments of the present invention.

Fig. 6 shows a schematic structural diagram of a channel quality measurement apparatus according to still other embodiments of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.

Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Fig. 1 shows a flow diagram of a channel quality measurement method according to some embodiments of the invention. As shown in fig. 1, the channel quality measurement method of this embodiment includes steps S102 to S108.

In step S102, the base station transmits CRS on a partial subband, where the base station is an LTE base station and a partial frequency band of the base station is dynamically spectrum-shared with the NR base station, and the partial subband is a subband that does not collide with NR.

The LTE base station actively transmits CRS with reduced power in the frequency domain where the LTE base station collides with NR, which corresponds to noise suppression (multiplexing) of subbands colliding with NR.

In some embodiments, the portion of the subbands is not the same as the subbands involved in at least one of SSB, RMSI, msg, msg4, paging of NR.

In step S104, the terminal transmits a measurement result to the base station, wherein the measurement result includes a full-band channel quality value and channel measurement information corresponding to each sub-band.

Since the base station knows which subbands do not transmit CRS, the terminal does not know this. Therefore, the terminal still estimates the measurement result in the context of the base station full band transmitted CRS, so that the measurement result is inaccurate.

In some embodiments, the channel measurement information is reflected by CQI. For example, the channel measurement information includes a CQI estimation value for each sub-band, and a difference value between an actual CQI value for each sub-band and a full-band CQI.

The channel quality estimate is determined by the terminal based on the actual measurement of each sub-band and the gap between the actual measurement and the full-band channel quality value. In some embodiments, the channel quality estimate for each sub-band is the sum of a full-band channel quality value and a sub-band offset, and the sub-band offset is determined from the difference between the actual channel quality value for the sub-band and the full-band channel quality value.

In some embodiments, the terminal determines the channel quality estimate by table 1, wherein "difference" represents the difference of the actual channel quality value of the sub-band and the full-band channel quality value, and H represents the full-band channel quality value.

TABLE 1

Difference value	Sub-band offset	Channel quality estimation value
			＝0	0	H+0
＝0	1	H+1
			≥2	2	H+2
≤-1	3	H+3

In some embodiments, when the base station transmits the CRS, the base station triggers the terminal to perform aperiodic reporting. The terminal reports the measurement result by adopting a high-layer configuration sub-band (Higher layer-configured subband CQI) mode. The higher layer configured subband reporting refers to reporting a full-band CQI to the UE for the whole system bandwidth, and reporting a CQI to each subband.

In step S106, the base station corrects measurement information corresponding to a subband not transmitting CRS, using measurement information corresponding to a subband transmitting CRS.

In some embodiments, the base station corrects the measurement information corresponding to the subband of the non-transmitted CRS using the measurement information corresponding to the subband of the transmitted CRS that is nearest to the subband of the non-transmitted CRS. Thus, the corrected value is made more accurate.

In some embodiments, the base station uses channel measurement information of a subband transmitting CRS that is nearest to a subband not transmitting CRS as the modified channel measurement information of the subband not transmitting CRS. Since the sub-band of the non-transmitted CRS does not actually have a corresponding measurement result, and the measurement information of the nearest sub-band having the measurement result is used as the measurement information of the sub-band of the non-transmitted CRS, the channel condition of the sub-band of the non-transmitted CRS can be reflected more accurately. Thus, the corrected value is made more accurate.

And for measurement information corresponding to the subband transmitting the CRS, the measurement information remains unchanged.

In step S108, the base station corrects the full-band channel quality value using the measurement information corresponding to the corrected subband.

To avoid collisions, the base station transmits CRS on subbands that do not collide with NR. And when the measurement result of the terminal on the whole band is obtained, the base station corrects the measurement information corresponding to the sub-band which does not transmit the CRS by adopting the measurement information corresponding to the sub-band which transmits the CRS, so that the measurement result is more accurate. By the above embodiment, the measurement of the channel quality can be realized in the case of resolving the collision of the CRS signal and the NR.

In some embodiments, after correcting the measurement information, the base station performs downlink scheduling using the measurement information corresponding to the corrected sub-band and the corrected full-band channel quality value.

An embodiment of the measurement information corresponding to the base station correction subband is described below with reference to fig. 2.

Fig. 2 illustrates a flow diagram of a measurement information correction method according to some embodiments of the invention. As shown in fig. 2, the measurement information correction method of this embodiment includes steps S202 to S210.

In step S202, the base station receives a measurement result transmitted by the terminal, where the measurement result includes a full-band channel quality value, a channel quality estimation value of each sub-band, and a difference value between the channel quality actual value of each sub-band and the full-band channel quality value.

In step S204, the base station determines an actual channel quality value of each sub-band according to the full-band channel quality value and the difference value corresponding to each sub-band.

In step S206, for each subband of the non-transmitted CRS, the base station uses the channel quality estimate of the subband of the transmitted CRS that is nearest to the subband of the non-transmitted CRS as the corrected channel quality estimate of the subband of the non-transmitted CRS.

In step S208, for each subband of the non-transmitted CRS, the base station uses the channel quality estimate of the subband of the transmitted CRS that is nearest to the subband of the non-transmitted CRS as the corrected channel quality estimate of the subband of the non-transmitted CRS.

In step S210, the base station determines a corrected full-band channel quality value according to the corrected channel quality actual value of each sub-band.

For example, an average value of the corrected channel quality actual values for each sub-band is taken as the corrected full-band channel quality value.

By the method of the embodiment, in the dynamic spectrum sharing scene, the base station can avoid collision with the NR when transmitting the CRS. In order not to affect the measurement result, the base station can correct measurement information corresponding to a subband not transmitting CRS using measurement information corresponding to a subband adjacent to the subband transmitting CRS, so that the corrected measurement information can more accurately reflect the situation of the subband not transmitting CRS. And the corrected actual value is used for determining the quality value of the full-band channel, so that the accuracy of the quality of the full-band channel is improved.

Therefore, the invention can solve the problem of collision between the CRS and the NR in the 4G and 5G shared spectrum scene.

An embodiment of the channel quality measuring apparatus of the present invention is described below with reference to fig. 3.

Fig. 3 illustrates a schematic structure of a channel quality measurement apparatus according to some embodiments of the present invention. As shown in fig. 3, the channel quality measurement apparatus 300 of this embodiment is located at a base station, and includes: a transmitting module 3100 configured to transmit a cell reference signal CRS on a portion of a subband, where the base station is a long term evolution LTE base station, and a portion of a frequency band of the base station is dynamically spectrum-shared with a new air interface NR base station, and a portion of the subband is a subband that does not collide with NR; an obtaining module 3200 configured to obtain a measurement result sent by the terminal, where the measurement result includes a full-band channel quality value and channel measurement information corresponding to each sub-band; a subband correction module 3300 configured to correct measurement information corresponding to a subband not transmitting CRS, using measurement information corresponding to a subband transmitting CRS; and a full band correction module 3400 configured to correct the full band channel quality value by the base station using the corrected measurement information corresponding to the sub-band.

In some embodiments, the subband modification module 3300 is further configured to, for each subband not transmitting CRS, utilize channel measurement information of a subband transmitting CRS that is nearest to the subband not transmitting CRS as modified channel measurement information of the subband not transmitting CRS.

In some embodiments, the full-band correction module 3400 is further configured to determine a corrected full-band channel quality value based on the corrected channel quality actual value for each sub-band.

In some embodiments, the channel quality measurement apparatus 300 further includes a scheduling module 3500 configured to perform downlink scheduling using the measurement information corresponding to the modified sub-band and the modified full-band channel quality value.

An embodiment of the channel quality measurement system of the present invention is described below with reference to fig. 4.

Fig. 4 illustrates a schematic diagram of a channel quality measurement system according to some embodiments of the invention. As shown in fig. 4, the channel quality measurement system 40 of this embodiment includes: a base station 410 including the channel measurement apparatus 300; and a terminal 420 configured to transmit a measurement result to the base station 410, wherein the measurement result includes a full-band channel quality value and channel measurement information corresponding to each sub-band.

In some embodiments, the terminal 420 performs aperiodic reporting and reports the measurement result using a higher layer configuration subband.

Fig. 5 is a schematic diagram showing the construction of a channel quality measuring apparatus according to other embodiments of the present invention. As shown in fig. 5, the channel quality measuring apparatus 50 of this embodiment includes: a memory 510 and a processor 520 coupled to the memory 510, the processor 520 being configured to perform the channel quality measurement method of any of the foregoing embodiments based on instructions stored in the memory 510.

The memory 510 may include, for example, system memory, fixed nonvolatile storage media, and the like. The system memory stores, for example, an operating system, application programs, boot Loader (Boot Loader), and other programs.

Fig. 6 shows a schematic structural diagram of a channel quality measurement apparatus according to still other embodiments of the present invention. As shown in fig. 6, the channel quality measuring apparatus 60 of this embodiment includes: the memory 610 and the processor 620 may also include an input-output interface 630, a network interface 640, a storage interface 650, and the like. These interfaces 630, 640, 650 and the memory 610 and processor 620 may be connected by, for example, a bus 660. The input/output interface 630 provides a connection interface for input/output devices such as a display, a mouse, a keyboard, and a touch screen. Network interface 640 provides a connection interface for various networking devices. The storage interface 650 provides a connection interface for external storage devices such as SD cards, U-discs, and the like.

An embodiment of the present invention also provides a computer-readable storage medium having stored thereon a computer program, wherein the program when executed by a processor implements any of the aforementioned methods of channel quality measurement.

It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flowchart and/or block of the flowchart illustrations and/or block diagrams, and combinations of flowcharts and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

1. A channel quality measurement method, comprising:

a base station transmits a Cell Reference Signal (CRS) on a part of sub-bands, wherein the base station is a Long Term Evolution (LTE) base station, a part of frequency bands of the base station are dynamically spectrum-shared with a new air interface (NR) base station, and the part of sub-bands are sub-bands which do not collide with NR;

the base station acquires a measurement result sent by a terminal, wherein the measurement result comprises a full-band channel quality value and channel measurement information corresponding to each sub-band;

the base station corrects the measurement information corresponding to the sub-bands which do not transmit the CRS by using the measurement information corresponding to the sub-bands which transmit the CRS; and

and the base station corrects the quality value of the full-band channel by using the measurement information corresponding to the corrected sub-band.

2. The channel quality measurement method of claim 1, wherein the correcting measurement information corresponding to the sub-bands of the non-transmitted CRS comprises:

for each sub-band of the non-transmitted CRS, the base station uses channel measurement information of a sub-band of the transmitted CRS that is nearest to the sub-band of the non-transmitted CRS as modified channel measurement information of the sub-band of the non-transmitted CRS.

3. The channel quality measurement method according to claim 1 or 2, wherein the channel measurement information corresponding to each sub-band includes a channel quality estimation value of each sub-band and a difference value of a channel quality actual value of each sub-band and the full-band channel quality value.

4. A channel quality measurement method according to claim 3, wherein the base station determines a corrected full band channel quality value from the corrected actual channel quality value for each sub-band.

5. The channel quality measurement method of claim 3, wherein the channel quality estimate value of each sub-band is a sum of a full-band channel quality value and a sub-band offset, and the sub-band offset is determined according to a difference between an actual channel quality value of the sub-band and the full-band channel quality value.

6. The channel quality measurement method of claim 5, wherein:

in the case that the difference between the actual channel quality value of the sub-band and the full-band channel quality value is 0, the sub-band offset corresponding to the sub-band is 0;

in the case that the difference is 1, the sub-band offset corresponding to the sub-band is 1;

when the difference is greater than or equal to 2, the sub-band offset corresponding to the sub-band is 2;

and when the difference value is less than or equal to-1, the sub-band offset corresponding to the sub-band is 3.

7. The channel quality measurement method of claim 1, wherein the partial subbands are not identical to subbands involved in at least one of SSB, RMSI, msg2, msg4, paging of NR.

8. The channel quality measurement method of claim 1, wherein the terminal performs aperiodic reporting and reports measurement results in a high-level configuration subband manner.

9. The channel quality measurement method of claim 1, further comprising:

and the base station adopts the measurement information corresponding to the corrected sub-band and the corrected full-band channel quality value to carry out downlink scheduling.

10. A channel quality measurement apparatus, located at a base station, comprising:

a transmitting module configured to transmit a cell reference signal CRS on a portion of a subband, where the base station is a long term evolution LTE base station, and a portion of a frequency band of the base station is dynamically spectrum-shared with a new air interface NR base station, and the portion of the subband is a subband that does not collide with NR;

the acquisition module is configured to acquire a measurement result sent by the terminal, wherein the measurement result comprises a full-band channel quality value and channel measurement information corresponding to each sub-band;

the sub-band correction module is configured to correct measurement information corresponding to a sub-band which does not transmit the CRS by using the measurement information corresponding to the sub-band which transmits the CRS; and

and the full-band correction module is configured to correct the full-band channel quality value by the base station through measurement information corresponding to the corrected sub-band.

11. A channel quality measurement apparatus, comprising:

a memory; and

a processor coupled to the memory, the processor configured to perform the channel quality measurement method of any of claims 1-9 based on instructions stored in the memory.

12. A channel quality measurement system, comprising:

a base station comprising the channel quality measurement apparatus of claim 10 or 11; and

and the terminal is configured to send a measurement result to the base station, wherein the measurement result comprises a full-band channel quality value and channel measurement information corresponding to each sub-band.

13. The channel quality measurement system of claim 12, wherein the channel measurement information for each sub-band includes a channel quality estimate for each sub-band and a difference between an actual channel quality value for each sub-band and the full-band channel quality value.

14. A computer readable storage medium having stored thereon a computer program which when executed by a processor implements the channel quality measurement method of any of claims 1 to 9.