CN106341215B - CQI reporting method, device and terminal of FDD system based on flexible duplex - Google Patents

CQI reporting method, device and terminal of FDD system based on flexible duplex Download PDF

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CN106341215B
CN106341215B CN201610853901.4A CN201610853901A CN106341215B CN 106341215 B CN106341215 B CN 106341215B CN 201610853901 A CN201610853901 A CN 201610853901A CN 106341215 B CN106341215 B CN 106341215B
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subframe
uplink
flexible
cqi
spectrum
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CN106341215A (en
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不公告发明人
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Meizu Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1438—Negotiation of transmission parameters prior to communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a CQI reporting method, a device and a terminal of an FDD system based on flexible duplex, wherein the CQI reporting method of the FDD system based on the flexible duplex comprises the following steps: measuring a CQI (channel quality indicator) aiming at a downlink subframe n in a downlink frequency spectrum, and reporting the CQI to a base station on an uplink subframe n + k in an uplink frequency spectrum, wherein n and n + k are subframe numbers, and the uplink subframe n + k is an uplink subframe n +4 or a first non-flexible subframe behind the uplink subframe n + 4; and measuring a CQI aiming at a flexible subframe m in an uplink frequency spectrum, and reporting the CQI to a base station on an uplink subframe m + k in the uplink frequency spectrum, wherein m and m + k are subframe numbers, the uplink subframe m + k is an uplink subframe m +4 or a first non-flexible subframe behind the uplink subframe m +4, and k is more than or equal to 4. By the technical scheme of the invention, the subframe in the FDD system with the flexible duplex can be ensured to carry out CQI reporting through proper CQI reporting resources.

Description

CQI reporting method, device and terminal of FDD system based on flexible duplex
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a CQI reporting method for a flexible duplex-based FDD system, a CQI reporting apparatus for a flexible duplex-based FDD system, and a terminal.
Background
Currently, the 5 th generation mobile communication system (5G) is under study in academia and industry. Among them, Ultra-Dense Network (UDN) is an important technology of 5G. The UDN is a technology for performing ultra-dense networking on scenes (such as sports stadiums, train station waiting halls, office places, and the like) with large data demand and a large number of data connections when a network is deployed, and the interval between access sites may be only tens of meters. One technology that may be used in the UDN scenario is Flexible Duplex (flexile Duplex), i.e. according to the service requirement, some subframes of the uplink spectrum in an FDD (Frequency Division Duplex) system carry downlink services. As shown in fig. 1, a UL subframe carries downlink traffic in an uplink spectrum, which is because in a UDN scenario, there are often situations where there is a large amount of downlink traffic (for example, there are many videos and pictures downloaded), downlink resources are busy, and most of the uplink resources are idle, and the flexible duplex technology can be used to more effectively utilize spectrum resources of an FDD system, thereby improving user experience. The flexible duplex technique is to use some subframes of the uplink spectrum as downlink subframes, i.e. to transmit downlink data on the time-frequency resources of these uplink subframes. These uplink subframes that are stolen for downlink data transmission are called flexible subframes, and uplink subframes that remain for uplink data transmission are called non-flexible subframes.
In an FDD system that does not use flexible duplex, a terminal reports a CQI (Channel Quality Indicator) of a corresponding downlink subframe in an uplink subframe, but when the uplink subframe is used as the downlink subframe, the following problems may occur: in the prior art, CQI reporting of corresponding downlink subframes is required on some uplink subframes, but after the uplink subframes are changed into flexible subframes, the corresponding downlink subframes lose uplink resources reported by the CQI; the uplink subframes are used for downlink data transmission after being changed into flexible subframes, and the flexible subframes also need to acquire the CQI of the downlink of the subframes for data scheduling. Aiming at the problems, corresponding CQI reporting resources are not specified in the current standard.
Disclosure of Invention
The present invention is based on at least one of the above technical problems, and provides a new CQI reporting scheme for an FDD system based on flexible duplex, which can ensure that a subframe in the FDD system based on flexible duplex can perform CQI reporting through appropriate CQI reporting resources.
In view of this, the present invention provides a CQI reporting method for an FDD system based on flexible duplex, including: measuring a CQI of a downlink subframe n in a downlink frequency spectrum, and reporting the CQI to a base station on an uplink subframe n + k in an uplink frequency spectrum, wherein n is a subframe number, and the uplink subframe n + k is an uplink subframe n +4 or a first non-flexible subframe behind the uplink subframe n + 4; and measuring a CQI aiming at a flexible subframe m in an uplink frequency spectrum, and reporting the CQI to a base station on an uplink subframe m + k in the uplink frequency spectrum, wherein m is a subframe number, the uplink subframe m + k is an uplink subframe m +4 or a first non-flexible subframe behind the uplink subframe m +4, and k is more than or equal to 4.
In the technical scheme, by measuring the CQI of a downlink subframe n in a downlink frequency spectrum, reporting the CQI to a base station on an uplink subframe n + k in the uplink frequency spectrum, measuring the CQI of a flexible subframe m in the uplink frequency spectrum, and reporting the CQI to the base station on the uplink subframe m + k in the uplink frequency spectrum, even if the uplink subframe in the uplink frequency spectrum is changed into the flexible subframe, the corresponding downlink subframe and the uplink subframe changed into the flexible subframe can report the CQI through proper CQI uplink resources.
In the foregoing technical solution, preferably, before the step of measuring the CQI for the downlink subframe n in the downlink spectrum, the method further includes: receiving an indication signaling sent by the base station, wherein the indication signaling is used for indicating flexible subframes and/or non-flexible subframes in the uplink spectrum; and determining flexible subframes and non-flexible subframes in the uplink spectrum according to the indication signaling.
In the technical scheme, the flexible subframes and/or the non-flexible subframes in the uplink spectrum are determined according to the indication signaling by receiving the indication signaling sent by the base station, so that the base station and the terminal can understand the same configuration of the flexible subframes and the non-flexible subframes, and the flexible subframes and the non-flexible subframes can be uniformly configured between the base station and the terminal.
In any one of the above technical solutions, preferably, the indication signaling includes any one of: physical layer signaling, MAC signaling, RRC signaling.
In the technical scheme, when an RRC (Radio Resource Control) signaling or a MAC (Media Access Control) signaling is adopted, since the update time of the RRC signaling and the MAC signaling is relatively long and generally lasts for tens to hundreds of milliseconds, the flexible duplex system can maintain the same flexible subframe/non-flexible subframe configuration for a long time and is more suitable for a cell with a large traffic volume; when the physical layer signaling is adopted, because the physical layer signaling is updated quickly, the flexible duplex system can quickly change the configuration of flexible subframes/non-flexible subframes by taking one frame (comprising 10 subframes) as a unit, and is suitable for cells with few cell users and obvious burst service characteristics.
In any one of the foregoing technical solutions, preferably, the flexible subframe is used for transmitting downlink data, and the non-flexible subframe is used for transmitting uplink data.
According to a second aspect of the present invention, a CQI reporting apparatus for an FDD system based on flexible duplex is provided, which includes: a first measurement unit, configured to measure a CQI for a downlink subframe n in a downlink spectrum; a first sending unit, configured to report the CQI to a base station on an uplink subframe n + k in an uplink spectrum, where n is a subframe number, and the uplink subframe n + k is an uplink subframe n +4 or a first non-flexible subframe after the uplink subframe n + 4; and a second measurement unit for measuring the CQI for the flexible subframe m in the uplink spectrum; and the second sending unit is used for reporting the CQI to a base station on an uplink subframe m + k in the uplink frequency spectrum, wherein m is a subframe number, the uplink subframe m + k is an uplink subframe m +4 or a first non-flexible subframe behind the uplink subframe m +4, and k is more than or equal to 4.
In the technical scheme, by measuring the CQI of a downlink subframe n in a downlink frequency spectrum, reporting the CQI to a base station on an uplink subframe n + k in the uplink frequency spectrum, measuring the CQI of a flexible subframe m in the uplink frequency spectrum, and reporting the CQI to the base station on the uplink subframe m + k in the uplink frequency spectrum, even if the uplink subframe in the uplink frequency spectrum is changed into the flexible subframe, the corresponding downlink subframe and the uplink subframe changed into the flexible subframe can report the CQI through proper CQI uplink resources.
In the above technical solution, preferably, the method further includes: a receiving unit, configured to receive an indication signaling sent by the base station, where the indication signaling is used to indicate a flexible subframe and/or a non-flexible subframe in the uplink spectrum; and the determining unit is used for determining the flexible subframes and the non-flexible subframes in the uplink frequency spectrum according to the indication signaling.
In the technical scheme, the flexible subframes and/or the non-flexible subframes in the uplink spectrum are determined according to the indication signaling by receiving the indication signaling sent by the base station, so that the base station and the terminal can understand the same configuration of the flexible subframes and the non-flexible subframes, and the flexible subframes and the non-flexible subframes can be uniformly configured between the base station and the terminal.
In any one of the above technical solutions, preferably, the indication signaling includes any one of: physical layer signaling, MAC signaling, RRC signaling.
In the technical scheme, when an RRC (Radio Resource Control) signaling or a MAC (Media Access Control) signaling is adopted, since the update time of the RRC signaling and the MAC signaling is relatively long and generally lasts for tens to hundreds of milliseconds, the flexible duplex system can maintain the same flexible subframe/non-flexible subframe configuration for a long time and is more suitable for a cell with a large traffic volume; when the physical layer signaling is adopted, because the physical layer signaling is updated quickly, the flexible duplex system can quickly change the configuration of flexible subframes/non-flexible subframes by taking one frame (comprising 10 subframes) as a unit, and is suitable for cells with few cell users and obvious burst service characteristics.
In any one of the foregoing technical solutions, preferably, the flexible subframe is used for transmitting downlink data, and the non-flexible subframe is used for transmitting uplink data.
According to a third aspect of the present invention, there is also provided a terminal, comprising: the CQI reporting apparatus for an FDD system based on flexible duplex according to any of the above technical solutions.
By the technical scheme, the subframe in the flexible duplex FDD system can be ensured to carry out CQI reporting through the proper CQI reporting resource.
Drawings
Fig. 1 is a diagram illustrating a structure of an uplink and downlink spectrum in an FDD system in the related art;
fig. 2 is a schematic flow chart of a CQI reporting method for a flexible duplex FDD-based system according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of a CQI reporting apparatus of an FDD system based on flexible duplex according to an embodiment of the present invention;
fig. 4 shows a schematic block diagram of a terminal according to an embodiment of the invention;
fig. 5 shows a timing diagram for CQI reporting for a flexible duplex based FDD system according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Fig. 2 is a schematic flow chart of a CQI reporting method for a flexible duplex FDD-based system according to an embodiment of the present invention.
As shown in fig. 2, a CQI reporting method for an FDD system based on flexible duplex according to an embodiment of the present invention includes:
step 202, measuring a CQI for a downlink subframe n in a downlink spectrum, and reporting the CQI to a base station on an uplink subframe n + k in an uplink spectrum, where n and n + k are subframe numbers, and the uplink subframe n + k is an uplink subframe n +4 or a first non-flexible subframe after the uplink subframe n + 4.
And 204, measuring a CQI aiming at a flexible subframe m in an uplink frequency spectrum, and reporting the CQI to a base station on an uplink subframe m + k in the uplink frequency spectrum, wherein m and m + k are subframe numbers, the uplink subframe m + k is an uplink subframe m +4 or a first non-flexible subframe behind the uplink subframe m +4, and k is more than or equal to 4.
In the technical scheme, by measuring the CQI of a downlink subframe n in a downlink frequency spectrum, reporting the CQI to a base station on an uplink subframe n + k in the uplink frequency spectrum, measuring the CQI of a flexible subframe m in the uplink frequency spectrum, and reporting the CQI to the base station on the uplink subframe m + k in the uplink frequency spectrum, even if the uplink subframe in the uplink frequency spectrum is changed into the flexible subframe, the corresponding downlink subframe and the uplink subframe changed into the flexible subframe can report the CQI through proper CQI uplink resources.
Specifically, as shown in fig. 5, in a certain flexible subframe configuration, the flexible subframe configured by the base station: subframes 0/1/2/3/5/6/7/8 of the uplink spectrum are each configured as flexible subframes, only subframe 4/9 remains as uplink subframes, i.e., non-flexible subframes.
When reporting CQI, the downlink subframe 0/6/7/8/9 of the downlink spectrum performs CQI feedback on the uplink subframe 4 of the uplink spectrum, the downlink subframe 1/2/3/4/5 of the downlink spectrum performs CQI feedback on the uplink subframe 9 of the uplink spectrum, the flexible subframe 0/6/7/8 of the uplink spectrum performs CQI feedback on the uplink subframe 4 of the uplink spectrum, and the flexible subframe 1/2/3/5 of the uplink spectrum performs CQI feedback on the uplink subframe 9 of the uplink spectrum.
In the foregoing technical solution, preferably, before the step of measuring the CQI for the downlink subframe n in the downlink spectrum, the method further includes: receiving an indication signaling sent by the base station, wherein the indication signaling is used for indicating flexible subframes and/or non-flexible subframes in the uplink spectrum; and determining flexible subframes and non-flexible subframes in the uplink spectrum according to the indication signaling.
In the technical scheme, the flexible subframes and/or the non-flexible subframes in the uplink spectrum are determined according to the indication signaling by receiving the indication signaling sent by the base station, so that the base station and the terminal can understand the same configuration of the flexible subframes and the non-flexible subframes, and the flexible subframes and the non-flexible subframes can be uniformly configured between the base station and the terminal.
In any one of the above technical solutions, preferably, the indication signaling includes any one of: physical layer signaling, MAC signaling, RRC signaling.
In the technical scheme, when an RRC (Radio Resource Control) signaling or a MAC (Media Access Control) signaling is adopted, since the update time of the RRC signaling and the MAC signaling is relatively long and generally lasts for tens to hundreds of milliseconds, the flexible duplex system can maintain the same flexible subframe/non-flexible subframe configuration for a long time and is more suitable for a cell with a large traffic volume; when the physical layer signaling is adopted, because the physical layer signaling is updated quickly, the flexible duplex system can quickly change the configuration of flexible subframes/non-flexible subframes by taking one frame (comprising 10 subframes) as a unit, and is suitable for cells with few cell users and obvious burst service characteristics.
In any one of the foregoing technical solutions, preferably, the flexible subframe is used for transmitting downlink data, and the non-flexible subframe is used for transmitting uplink data.
Fig. 3 is a schematic block diagram of a CQI reporting apparatus of a flexible duplex FDD system according to an embodiment of the present invention.
As shown in fig. 3, a CQI reporting apparatus 300 for an FDD system based on flexible duplex according to an embodiment of the present invention includes: a first measurement unit 302, a first transmission unit 304, a second measurement unit 306 and a second transmission unit 308.
Wherein, the first measurement unit 302 is configured to measure a CQI for a downlink subframe n in a downlink spectrum; the first sending unit 304 is configured to report the CQI to a base station on an uplink subframe n + k in an uplink spectrum, where n and n + k are subframe numbers, and the uplink subframe n + k is an uplink subframe n +4 or a first non-flexible subframe after the uplink subframe n + 4; and a second measurement unit 306 is configured to measure CQI for the flexible subframe m in the uplink spectrum; the second sending unit 308 is configured to report the CQI to the base station on an uplink subframe m + k in the uplink spectrum, where m and m + k are subframe numbers, the uplink subframe m + k is an uplink subframe m +4 or a first non-flexible subframe after the uplink subframe m +4, and k is greater than or equal to 4.
In the technical scheme, by measuring the CQI of a downlink subframe n in a downlink frequency spectrum, reporting the CQI to a base station on an uplink subframe n + k in the uplink frequency spectrum, measuring the CQI of a flexible subframe m in the uplink frequency spectrum, and reporting the CQI to the base station on the uplink subframe m + k in the uplink frequency spectrum, even if the uplink subframe in the uplink frequency spectrum is changed into the flexible subframe, the corresponding downlink subframe and the uplink subframe changed into the flexible subframe can report the CQI through proper CQI uplink resources.
In the above technical solution, preferably, the method further includes: a receiving unit 310, configured to receive an indication signaling sent by the base station, where the indication signaling is used to indicate a flexible subframe and/or a non-flexible subframe in the uplink spectrum; a determining unit 312, configured to determine a flexible subframe and a non-flexible subframe in the uplink spectrum according to the indication signaling.
In the technical scheme, the flexible subframes and/or the non-flexible subframes in the uplink spectrum are determined according to the indication signaling by receiving the indication signaling sent by the base station, so that the base station and the terminal can understand the same configuration of the flexible subframes and the non-flexible subframes, and the flexible subframes and the non-flexible subframes can be uniformly configured between the base station and the terminal.
In any one of the above technical solutions, preferably, the indication signaling includes any one of: physical layer signaling, MAC signaling, RRC signaling.
In the technical scheme, when an RRC (Radio Resource Control) signaling or a MAC (Media Access Control) signaling is adopted, since the update time of the RRC signaling and the MAC signaling is relatively long and generally lasts for tens to hundreds of milliseconds, the flexible duplex system can maintain the same flexible subframe/non-flexible subframe configuration for a long time and is more suitable for a cell with a large traffic volume; when the physical layer signaling is adopted, because the physical layer signaling is updated quickly, the flexible duplex system can quickly change the configuration of flexible subframes/non-flexible subframes by taking one frame (comprising 10 subframes) as a unit, and is suitable for cells with few cell users and obvious burst service characteristics.
In any one of the foregoing technical solutions, preferably, the flexible subframe is used for transmitting downlink data, and the non-flexible subframe is used for transmitting uplink data.
Fig. 4 shows a schematic block diagram of a terminal according to an embodiment of the invention.
As shown in fig. 4, a terminal 400 according to an embodiment of the present invention includes: fig. 3 shows a CQI reporting apparatus 300 for an FDD system based on flexible duplex.
The technical scheme of the invention is described in detail in the above with reference to the accompanying drawings, and the invention provides a new CQI reporting scheme based on a flexible duplex FDD system, which can ensure that a subframe in the flexible duplex FDD system can perform CQI reporting through a proper CQI reporting resource.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. A CQI reporting method of an FDD system based on flexible duplex is characterized by comprising the following steps:
receiving an indication signaling sent by a base station, wherein the indication signaling is used for indicating a flexible subframe and/or a non-flexible subframe in an uplink spectrum;
determining flexible subframes and non-flexible subframes in the uplink spectrum according to the indication signaling;
measuring a CQI (channel quality indicator) aiming at a downlink subframe n in a downlink frequency spectrum, and reporting the CQI to a base station on an uplink subframe n + k in an uplink frequency spectrum, wherein n and n + k are subframe numbers, and the uplink subframe n + k is an uplink subframe n +4 or a first non-flexible subframe behind the uplink subframe n + 4; and
measuring a CQI (channel quality indicator) aiming at a flexible subframe m in an uplink frequency spectrum, and reporting the CQI to a base station on an uplink subframe m + k in the uplink frequency spectrum, wherein m and m + k are subframe numbers, the uplink subframe m + k is an uplink subframe m +4 or a first non-flexible subframe behind the uplink subframe m +4, and k is more than or equal to 4;
the indication signaling comprises any one of:
physical layer signaling, MAC signaling, RRC signaling.
2. The method of claim 1, wherein the flexible subframes are used for transmitting downlink data and the non-flexible subframes are used for transmitting uplink data.
3. A CQI reporting device of an FDD system based on flexible duplex is characterized by comprising:
the base station comprises a receiving unit, a transmitting unit and a receiving unit, wherein the receiving unit receives an indication signaling sent by the base station, and the indication signaling is used for indicating flexible subframes and/or non-flexible subframes in an uplink frequency spectrum;
a determining unit, configured to determine a flexible subframe and a non-flexible subframe in the uplink spectrum according to the indication signaling;
a first measurement unit, configured to measure a CQI for a downlink subframe n in a downlink spectrum;
a first sending unit, configured to report the CQI to a base station on an uplink subframe n + k in an uplink spectrum, where n and n + k are subframe numbers, and the uplink subframe n + k is an uplink subframe n +4 or a first non-flexible subframe after the uplink subframe n + 4; and
a second measurement unit, configured to measure a CQI for a flexible subframe m in an uplink spectrum;
a second sending unit, configured to report the CQI to a base station on an uplink subframe m + k in the uplink spectrum, where m and m + k are subframe numbers, the uplink subframe m + k is an uplink subframe m +4 or a first non-flexible subframe after the uplink subframe m +4, and k is greater than or equal to 4;
the indication signaling comprises any one of:
physical layer signaling, MAC signaling, RRC signaling.
4. The apparatus of claim 3, wherein the flexible subframes are used for transmitting downlink data and the non-flexible subframes are used for transmitting uplink data.
5. A terminal, comprising: the CQI reporting apparatus of an FDD system based on Flex Duplex according to claim 3 or 4.
CN201610853901.4A 2016-09-26 2016-09-26 CQI reporting method, device and terminal of FDD system based on flexible duplex Active CN106341215B (en)

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CN103748820A (en) * 2013-09-05 2014-04-23 华为技术有限公司 Method and apparatus for reporting channel state information and determining modulation code mode
CN105099631A (en) * 2014-04-17 2015-11-25 北京三星通信技术研究有限公司 Method and device for processing flexible duplex
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