CN103036655B - A kind of method and apparatus for realizing CSI feedback - Google Patents

A kind of method and apparatus for realizing CSI feedback Download PDF

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Publication number
CN103036655B
CN103036655B CN201110294069.6A CN201110294069A CN103036655B CN 103036655 B CN103036655 B CN 103036655B CN 201110294069 A CN201110294069 A CN 201110294069A CN 103036655 B CN103036655 B CN 103036655B
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feedback
csi
receiving side
mode
configuration information
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CN103036655A (en
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郭森宝
孙云锋
李儒岳
陈艺戬
张峻峰
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2012/077564 priority patent/WO2013044657A1/en
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    • 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
    • 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
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
    • 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
    • H04L1/0028—Formatting
    • H04L1/0031—Multiple signaling transmission
    • 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
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

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

Abstract

The invention discloses a kind of method and apparatus for realizing CSI feedback, network side can be proceeded as follows by high-level signaling or physical layer signaling：Different CoMP measuring assemblies are respectively configured for periodic feedback and aperiodicity feedback, to indicate receiving side selection node and application PUCCH and PUSCH feedbacks CSI；Alternatively, for periodic feedback and the same set of CoMP measuring assemblies of aperiodicity feedback configuration, to indicate that receiving side selects node identical or different in the CoMP measuring assemblies and application PUCCH and PUSCH feedbacks CSI.The present invention realizes the technology of CSI feedback, ensure the independence of periodic feedback and aperiodicity feedback, while so as to ensure demand of the CoMP user to feedback capacity, ensure the accuracy of CSI simultaneously can debasing the standard effort, also support the adaptive switching between different CoMP patterns.

Description

Method and device for realizing CSI feedback
Technical Field
The present invention relates to the field of communications, and in particular, to a method and an apparatus for implementing Channel State Information (CSI) feedback.
Background
Long Term Evolution (LTE) systems have started to study R11 technology after undergoing Release 8/9/10. At present, part of the R8 products are in commercial use, and R9 and R10 are in need of further product planning.
After the stages of R8 and R9, R10 adds many new characteristics on the basis of the former two, such as DMRS (Demodulation Reference Signal), CSI-RS (Channel State information Reference Signal), and other pilot characteristics, 8-antenna support and other transmission and feedback characteristics, and particularly, elcic (enhanced Inter-Cell Interference cancellation) technology considers the R8/9ICIC, and further considers the Interference avoidance technology between cells. For a technology for solving the problem of inter-cell interference, cell interference avoidance under a homogeneous network is mainly considered in an initial stage of the R10 stage, where an elcic technology and a CoMP (Coordinated Multi-point) technology are mainly considered.
Currently, CoMP feedback can be mainly classified into periodic feedback and aperiodic feedback, and aggregated channel state information feedback and non-aggregated channel state information feedback. The feedback of the aggregated channel state information refers to: and aggregating the channel state information of a plurality of nodes into the channel state information of one node and performing global feedback. Non-aggregated channel state information feedback can be divided into independent single cell feedback and independent single cell feedback plus inter-cell correction information. The independent single cell feedback refers to: and independently performing measurement and other related calculations according to the channel state information of each node and feeding back. The independent single cell feedback plus inter-cell correction information refers to: and independently performing measurement and other related calculations according to the channel state information of each node, and calculating phase and/or amplitude information among the nodes and performing feedback.
The traditional R8/R9/R10 user only needs to feed back the CSI of the serving cell, so that only the capacity of a single cell is considered when periodic feedback and non-periodic feedback are carried out on the same carrier. For a PUCCH (Physical Uplink control channel), only the feedback of a single cell needs to be optimized. Considering coding, HARQ (Hybrid Adaptive Request Retransmission) bit number, etc., one UE supports CSI feedback of maximum 11 bits in one PUCCH uplink subframe. Of the 11 bits, a Precoding Matrix Indicator (PMI) of 4 bits and a Channel Quality Indicator (CQI) of 7 bits of two codewords can be supported maximally (considering differential feedback of CQIs between different codewords). Since CSI feedback for a plurality of cells is considered, PUCCH capacity capability of N × 11 bits is required, but the current PUCCH capacity cannot meet the requirement, and therefore a reasonable feedback scheme is required to solve the problem of insufficient PUCCH capacity.
In order to solve the above problem, it is easy to think that feedback signaling is compressed, but CoMP has a high requirement on the accuracy of CSI, so the performance loss caused by compression may cause a reduction in CoMP performance gain. Another consideration may be to increase the capacity of the PUCCH, but this requires redesigning the feedback format of the PUCCH, and therefore entails a major standardization effort.
Disclosure of Invention
In view of the above, the main object of the present invention is to provide a method and an apparatus for implementing CSI feedback, which ensure the accuracy of CSI and reduce the standardization effort while ensuring the capacity.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for realizing CSI feedback, a network side performs the following operations through high-level signaling or physical layer signaling:
configuring different multipoint cooperation CoMP measurement sets for periodic feedback and aperiodic feedback respectively to indicate a receiving side to select nodes and apply a Physical Uplink Control Channel (PUCCH) and a Physical Uplink Shared Channel (PUSCH) to feed back CSI; or,
and configuring the same CoMP measurement set for periodic feedback and aperiodic feedback to indicate a receiving side to select the same or different nodes in the CoMP measurement set and apply PUCCH and PUSCH to feed back CSI.
The method for configuring the same CoMP measurement set comprises the following steps:
the network side configures configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to a receiving side through a high-level signaling, wherein the configuration information of the main service node enables the receiving side to periodically or aperiodically feed back CSI, and the configuration information of other cooperative measurement nodes only enables the receiving side to aperiodically feed back the CSI.
The method further comprises the following steps:
the configuration information of the main service node enables the receiving side to only enable the receiving side to periodically feed back CSI;
when the network side triggers the non-periodic feedback of the receiving side, the receiving side is triggered to feed back the CSI of all the cooperative measurement nodes except the main service node in the measurement set;
the network side informs a receiving side of a cooperative measurement node needing feedback through a high-level signaling and/or a physical layer signaling, and triggers the receiving side to feed back CSI in an aggregation feedback mode or an independent cell feedback mode or a mode of feeding back the CSI by an independent cell and adding correction information among cells;
or, the configuration information of the main service node enables the receiving side to periodically feed back the CSI;
when the network side triggers the non-periodic feedback of the receiving side, the receiving side is triggered to feed back the CSI of all the cooperative measurement nodes in the measurement set;
the network side informs the receiving side of the cooperative measurement nodes needing to be fed back through high-level signaling and/or physical-layer signaling, and triggers the receiving side to feed back the CSI in an aggregation feedback mode or an independent cell feedback mode or a mode of feeding back the CSI by the independent cell and adding correction information among the cells.
The method for configuring the same CoMP measurement set comprises the following steps: the network side configures configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to a receiving side through a high-level signaling, and triggers the receiving side to feed back CSI of all nodes in the CoMP measurement set in different subframes in a time division manner according to an independent cell feedback manner or an independent cell feedback manner plus inter-cell correction information manner when performing periodic feedback, or feeds back CSI of a plurality of or all nodes in one subframe;
the network side also triggers the aperiodic feedback of the receiving side through the dynamic physical downlink control signaling, and adds a bitmap (bitmap) sequence in the signaling to indicate the CoMP measurement set corresponding to the aperiodic feedback of the receiving side or all or part of the nodes in the CoMP measurement set.
The method for configuring different coordinated multipoint CoMP measurement sets comprises the following steps:
the network side configures two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to the receiving side through a high-level signaling, wherein one set of configuration information is used for indicating the periodic feedback of the receiving side, and the other set of configuration information is used for indicating the aperiodic feedback of the receiving side;
the method comprises the steps that for cooperative measurement nodes needing periodic feedback, indication can be given only to feedback in an aggregation mode; and aiming at the cooperative measurement nodes needing non-periodic feedback, indicating to feed back in an aggregation mode or an independent cell feedback mode or a mode of feeding back the independent cell and adding correction information among the cells.
The method for configuring different coordinated multipoint CoMP measurement sets comprises the following steps:
the network side configures two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to the receiving side through a high-level signaling, wherein one set of configuration information is used for indicating the periodic feedback of the receiving side, and the other set of configuration information is used for indicating the aperiodic feedback of the receiving side;
the indication can only be fed back in an independent cell feedback mode aiming at the cooperative measurement node needing periodic feedback; indicating that CSI is fed back in different subframes in a time division mode aiming at different nodes during feedback, or feeding back CSI of a plurality of or all nodes in one subframe; and aiming at the cooperative measurement nodes needing non-periodic feedback, indicating to feed back in an aggregation mode or in an independent cell feedback mode or in a mode of feeding back the independent cell and adding correction information among cells.
The method for configuring different coordinated multipoint CoMP measurement sets comprises the following steps:
a network side configures two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to a receiving side through a high-level signaling, wherein one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side;
the method comprises the steps that for a cooperative measurement node needing periodic feedback, an instruction can be given only to feedback in a mode of independent cell feedback plus phase correction; indicating that CSI is fed back in different subframes in a time division mode aiming at different nodes during feedback, or feeding back CSI of a plurality of or all nodes in one subframe; and aiming at the cooperative measurement nodes needing non-periodic feedback, indicating to feed back in an aggregation mode or in a non-aggregation mode.
The method for configuring different coordinated multipoint CoMP measurement sets comprises the following steps:
a network side configures two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to a receiving side through a high-level signaling, wherein one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side;
the method comprises the steps that for a receiving side needing periodic feedback, CSI is indicated to be fed back in an aggregation feedback or independent cell feedback plus phase correction mode; indicating that CSI is fed back in different subframes in a time division mode aiming at different nodes during feedback, or feeding back CSI of a plurality of or all nodes in one subframe; and aiming at the cooperative measurement nodes needing non-periodic feedback, indicating to feed back in an aggregation mode or in an independent cell feedback mode or in a mode of feeding back the independent cell and adding correction information among cells.
The method further comprises the following steps:
when non-periodic feedback is needed, indicating a receiving side to feed back CSI of all cooperative measurement nodes except a main service node;
and/or the network side informs the receiving side of the cooperative measurement node needing feedback through high-level signaling and/or physical-layer signaling, and instructs the receiving side to feed back CSI in an aggregation feedback mode or an independent cell feedback mode or a mode of adding correction information between cells to the feedback of the independent cell.
The method further comprises the following steps:
when a receiving side is informed of a cooperative measurement node needing feedback through a physical layer signaling, a bitmap sequence used for indicating the cooperative measurement node is added into a control signaling used for triggering non-periodic feedback in a downlink, and 0 and 1 respectively represent whether CSI needs to be fed back or not;
when the notification is performed through physical layer signaling, 1 or 2 bits are added to control signaling for triggering aperiodic feedback to indicate a feedback mode.
A method of implementing CSI feedback, the method comprising,
the receiving side receives the following information: the network side respectively configures different CoMP measurement sets for periodic feedback and aperiodic feedback through high-level signaling or physical layer signaling, or configures the same CoMP measurement set for periodic feedback and aperiodic feedback;
aiming at the received different CoMP measurement sets, a receiving side selects nodes and respectively applies PUCCH and PUSCH to feed back CSI; and aiming at the same received CoMP measurement set, the receiving side selects the same or different nodes in the CoMP measurement set and feeds back CSI by applying PUCCH and PUSCH.
The method for receiving the information by the receiving side comprises the following steps:
a receiving side receives a high-level signaling sent by a network side to obtain configuration information of a CoMP measurement set comprising a plurality of cooperative measurement nodes; and confirming that the CSI can be fed back only in a non-periodic mode according to the configuration information of the cooperative measurement node.
The method further comprises the following steps:
the receiving side confirms that only CSI can be fed back periodically according to the configuration information of the main service node; the receiving side obtains an aperiodic feedback signaling which is used for triggering the receiving side by the network side through blind detection of the downlink control signaling, and feeds back CSI of all cooperative measurement nodes except the main service node in the measurement set, wherein the feedback mode is as follows: feeding back CSI in an aggregation feedback mode or an independent cell feedback mode or a mode of feeding back the CSI by an independent cell and adding correction information among cells;
or the receiving side confirms that the CSI can be fed back periodically according to the configuration information of the main service node; the receiving side obtains a non-periodic feedback signaling used by the network side for triggering the receiving side through blind detection of the downlink control signaling, and feeds back CSI of all cooperative measurement nodes in the measurement set, wherein the feedback mode is as follows: and feeding back CSI in an aggregation feedback mode or an independent cell feedback and inter-cell correction information mode.
The method for receiving the information by the receiving side comprises the following steps: a receiving side receives a high-level signaling sent by a network side to obtain configuration information of a CoMP measurement set comprising a plurality of cooperative measurement nodes, and confirms that CSI is fed back in different subframes for all nodes in the CoMP measurement set in a time division manner according to an independent cell feedback manner when periodic feedback is carried out;
the receiving side also detects the physical downlink control signaling to dynamically obtain the signaling triggering the aperiodic feedback, and detects the bitmap sequence in the signaling to obtain the CoMP measurement set needing the aperiodic feedback.
The method for receiving the information by the receiving side comprises the following steps: a receiving side receives a high-level signaling sent by a network side to obtain two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes, wherein one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side;
the method comprises the steps that for cooperative measurement nodes needing periodic feedback, feedback can be confirmed to be carried out only in an aggregation mode; and confirming feedback in an aggregation mode or an independent cell feedback mode or a mode of feeding back the independent cell feedback plus correction information among the cells aiming at the cooperative measurement nodes needing non-periodic feedback.
The method for receiving the information by the receiving side comprises the following steps: a receiving side receives high-level signaling configuration sent by a network side to obtain two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes, wherein one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side;
the method comprises the steps that for a cooperative measurement node needing periodic feedback, feedback can be confirmed to be carried out only in an independent cell feedback mode; confirming that CSI is fed back in different subframes in a time division mode aiming at different nodes during feedback, or feeding back CSI of a plurality of or all nodes in one subframe; and confirming that feedback is carried out in an aggregation mode or feedback is carried out in an independent cell feedback and inter-cell correction information mode aiming at the cooperative measurement node needing non-periodic feedback.
The method for receiving the information by the receiving side comprises the following steps: a receiving side receives a high-level signaling sent by a network side to obtain two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes, wherein one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side;
the method comprises the steps that for a cooperative measurement node needing periodic feedback, feedback can be confirmed to be carried out only according to an independent cell feedback and phase correction mode; confirming that CSI is fed back in different subframes in a time division mode aiming at different nodes during feedback, or feeding back CSI of a plurality of or all nodes in one subframe; and confirming feedback according to an aggregation or non-aggregation mode aiming at the cooperative measurement nodes needing non-periodic feedback.
The method for receiving the information by the receiving side comprises the following steps: a receiving side receives a high-level signaling sent by a network side to obtain two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes, wherein one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side;
confirming feedback according to an aggregation feedback or independent cell feedback or a mode of adding phase correction to independent cell feedback aiming at a cooperative measurement node needing periodic feedback; confirming that CSI is fed back in different subframes in a time division mode aiming at different nodes during feedback, or feeding back CSI of a plurality of or all nodes in one subframe; and confirming that feedback is carried out in an aggregation mode or feedback is carried out in an independent cell feedback and inter-cell correction information mode aiming at the cooperative measurement node needing non-periodic feedback.
The method further comprises the following steps:
when a receiving side obtains a signaling used by a network side for triggering non-periodic feedback of the receiving side, the CSI of all cooperative measurement nodes except a main service node in a measurement set is fed back, and the feedback mode is as follows: and feeding back in an aggregation feedback mode or an independent cell feedback and inter-cell correction information mode.
The method further comprises the following steps:
when a receiving side detects a cooperative measurement node set needing aperiodic feedback in physical layer signaling, a bitmap sequence is detected in downlink aperiodic trigger signaling to obtain cooperative measurement node information needing CSI feedback; 0 and 1 in the bitmap sequence respectively represent whether CSI needs to be fed back or not;
when the receiving side detects the feedback mode in the physical layer signaling, the related bit information is detected in the non-periodic trigger signaling to acquire the feedback mode.
An apparatus for implementing CSI feedback, located on a network side, is configured to perform the following operations through higher layer signaling or physical layer signaling:
configuring different CoMP measurement sets for periodic feedback and aperiodic feedback respectively to indicate a receiving side to select nodes and apply PUCCH and PUSCH to feed back CSI respectively; or,
and configuring the same CoMP measurement set for periodic feedback and aperiodic feedback to indicate a receiving side to select the same or different nodes in the CoMP measurement set and apply PUCCH and PUSCH to feed back CSI.
The apparatus, when configuring the same set of CoMP measurement sets, is configured to:
the network side configures configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to a receiving side through a high-level signaling, wherein the configuration information of the main service node enables the receiving side to periodically or aperiodically feed back CSI, and the configuration information of other cooperative measurement nodes only enables the receiving side to aperiodically feed back the CSI.
The configuration information of the main service node enables a receiving side to only feed back CSI periodically;
the apparatus is also configured to: when the aperiodic feedback of the receiving side is triggered, the receiving side is triggered to feed back the CSI of all the cooperative measurement nodes except the main service node in the measurement set;
informing a receiving side of a cooperative measurement node needing feedback through a high-level signaling and/or a physical layer signaling, and triggering the receiving side to feed back CSI in an aggregation feedback mode or an independent cell feedback mode or a mode of feeding back the CSI by an independent cell and adding correction information among cells;
or, the configuration information of the main service node enables the receiving side to periodically feed back the CSI;
the apparatus is also configured to: when the aperiodic feedback of the receiving side is triggered, the receiving side is triggered to feed back the CSI of all the cooperative measurement nodes in the measurement set;
and informing the cooperative measurement node needing to be fed back to the receiving side through a high-layer signaling and/or a physical layer signaling, and triggering the receiving side to feed back the CSI in an aggregation feedback mode or an independent cell feedback mode or a mode of feeding back the CSI by the independent cell and adding correction information among the cells.
The apparatus, when configuring the same set of CoMP measurement sets, is configured to: configuring configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to a receiving side through a high-level signaling, and triggering the receiving side to feed back CSI of all nodes in the CoMP measurement set in different subframes in a time division manner according to an independent cell feedback manner or an independent cell feedback manner plus inter-cell correction information manner when performing periodic feedback, or feeding back CSI of a plurality of or all nodes in one subframe;
the apparatus is further configured to: triggering the aperiodic feedback of the receiving side through a dynamic physical downlink control signaling, and adding a bitmap sequence into the signaling to indicate a CoMP measurement set corresponding to the aperiodic feedback of the receiving side or all nodes in the CoMP measurement set.
The apparatus, when configuring different coordinated multipoint CoMP measurement sets, is configured to:
configuring two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to a receiving side through a high-level signaling, wherein one set of configuration information is used for indicating periodic feedback of the receiving side, and the other set of configuration information is used for indicating aperiodic feedback of the receiving side;
the method comprises the steps that for cooperative measurement nodes needing periodic feedback, indication can be given only to feedback in an aggregation mode; and aiming at the cooperative measurement nodes needing non-periodic feedback, indicating to feed back in an aggregation mode or an independent cell feedback mode or a mode of feeding back the independent cell and adding correction information among the cells.
The apparatus, when configuring different coordinated multipoint CoMP measurement sets, is configured to:
configuring two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to a receiving side through a high-level signaling, wherein one set of configuration information is used for indicating periodic feedback of the receiving side, and the other set of configuration information is used for indicating aperiodic feedback of the receiving side;
the indication can only be fed back in an independent cell feedback mode aiming at the cooperative measurement node needing periodic feedback; indicating that CSI is fed back in different subframes in a time division mode aiming at different nodes during feedback, or feeding back CSI of a plurality of or all nodes in one subframe; and aiming at the cooperative measurement nodes needing non-periodic feedback, indicating to feed back in an aggregation mode or in an independent cell feedback mode or in a mode of feeding back the independent cell and adding correction information among cells.
The apparatus, when configuring different coordinated multipoint CoMP measurement sets, is configured to:
configuring two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to a receiving side through a high-level signaling, wherein one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side;
the method comprises the steps that for a cooperative measurement node needing periodic feedback, an instruction can be given only to feedback in a mode of independent cell feedback plus phase correction; indicating that CSI is fed back in different subframes in a time division mode aiming at different nodes during feedback, or feeding back CSI of a plurality of or all nodes in one subframe; and aiming at the cooperative measurement nodes needing non-periodic feedback, indicating to feed back in an aggregation mode or in a non-aggregation mode.
The apparatus, when configuring different coordinated multipoint CoMP measurement sets, is configured to:
configuring two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to a receiving side through a high-level signaling, wherein one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side;
the method comprises the steps that for a receiving side needing periodic feedback, CSI is indicated to be fed back in an aggregation feedback or independent cell feedback plus phase correction mode; indicating that CSI is fed back in different subframes in a time division mode aiming at different nodes during feedback, or feeding back CSI of a plurality of or all nodes in one subframe; and aiming at the cooperative measurement nodes needing non-periodic feedback, indicating to feed back in an aggregation mode or in an independent cell feedback mode or in a mode of feeding back the independent cell and adding correction information among cells.
The apparatus is also configured to:
when non-periodic feedback is needed, indicating a receiving side to feed back CSI of all cooperative measurement nodes except a main service node;
and/or informing the cooperative measurement node needing feedback by the receiving side through high-level signaling and/or physical-layer signaling, and indicating the receiving side to feed back the CSI in an aggregation feedback mode or an independent cell feedback mode or a mode of adding correction information between cells by independent cell feedback.
The apparatus is also configured to:
when a receiving side is informed of a cooperative measurement node needing feedback through a physical layer signaling, a bitmap sequence used for indicating the cooperative measurement node is added into a control signaling used for triggering non-periodic feedback in a downlink, and 0 and 1 respectively represent whether CSI needs to be fed back or not;
when the notification is performed through physical layer signaling, l or 2 bits are added to control signaling for triggering aperiodic feedback to indicate a feedback mode.
The apparatus is a base station.
An apparatus for implementing CSI feedback, at a receiving side, the apparatus is configured to,
receiving the following information: the network side respectively configures different CoMP measurement sets for periodic feedback and aperiodic feedback through high-level signaling or physical layer signaling, or configures the same CoMP measurement set for periodic feedback and aperiodic feedback;
selecting nodes and respectively applying PUCCH and PUSCH to feed back CSI aiming at the received different CoMP measurement sets; and aiming at the same received CoMP measurement set, the receiving side selects the same or different nodes in the CoMP measurement set and feeds back CSI by applying PUCCH and PUSCH.
The apparatus, when receiving the information, is configured to:
a receiving side receives a high-level signaling sent by a network side to obtain configuration information of a CoMP measurement set comprising a plurality of cooperative measurement nodes; and confirming that the CSI can be fed back only in a non-periodic mode according to the configuration information of the cooperative measurement node.
The apparatus is also configured to:
confirming that only CSI can be fed back periodically according to configuration information of the main service node; obtaining an aperiodic feedback signaling used by a network side for triggering a receiving side by blindly detecting a downlink control signaling, and feeding back CSI of all cooperative measurement nodes except a main service node in a measurement set, wherein the feedback mode is as follows: feeding back CSI in an aggregation feedback mode or an independent cell feedback mode or a mode of feeding back the CSI by an independent cell and adding correction information among cells;
or, confirming that the CSI can be fed back periodically according to the configuration information of the main service node; obtaining an aperiodic feedback signaling used by a network side for triggering a receiving side by blindly detecting a downlink control signaling, and feeding back CSI of all cooperative measurement nodes in a measurement set, wherein the feedback mode is as follows: and feeding back CSI in an aggregation feedback mode or an independent cell feedback and inter-cell correction information mode.
The apparatus, when receiving the information, is configured to: receiving a high-level signaling sent by a network side to obtain configuration information of a CoMP measurement set comprising a plurality of cooperative measurement nodes, and confirming that CSI is fed back in different subframes for all nodes in the CoMP measurement set in a time division manner according to an independent cell feedback manner during periodic feedback;
the device is also used for detecting the physical downlink control signaling to dynamically obtain the signaling triggering the aperiodic feedback, and detecting the bitmap sequence in the signaling to obtain the CoMP measurement set needing the aperiodic feedback.
The apparatus, when receiving the information, is configured to: receiving a high-level signaling sent by a network side to obtain two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes, wherein one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side;
the method comprises the steps that for cooperative measurement nodes needing periodic feedback, feedback can be confirmed to be carried out only in an aggregation mode; and confirming feedback in an aggregation mode or an independent cell feedback mode or a mode of feeding back the independent cell feedback plus correction information among the cells aiming at the cooperative measurement nodes needing non-periodic feedback.
The apparatus, when receiving the information, is configured to: receiving high-level signaling configuration sent by a network side to obtain two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes, wherein one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side;
the method comprises the steps that for a cooperative measurement node needing periodic feedback, feedback can be confirmed to be carried out only in an independent cell feedback mode; confirming that CSI is fed back in different subframes in a time division mode aiming at different nodes during feedback, or feeding back CSI of a plurality of or all nodes in one subframe; and confirming that feedback is carried out in an aggregation mode or feedback is carried out in an independent cell feedback and inter-cell correction information mode aiming at the cooperative measurement node needing non-periodic feedback.
The apparatus, when receiving the information, is configured to: receiving a high-level signaling sent by a network side to obtain two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes, wherein one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side;
the method comprises the steps that for a cooperative measurement node needing periodic feedback, feedback can be confirmed to be carried out only according to an independent cell feedback and phase correction mode; confirming that CSI is fed back in different subframes in a time division mode aiming at different nodes during feedback, or feeding back CSI of a plurality of or all nodes in one subframe; and confirming feedback according to an aggregation or non-aggregation mode aiming at the cooperative measurement nodes needing non-periodic feedback.
The apparatus, when receiving the information, is configured to: a receiving side receives a high-level signaling sent by a network side to obtain two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes, wherein one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side;
confirming feedback according to an aggregation feedback or independent cell feedback or a mode of adding phase correction to independent cell feedback aiming at a cooperative measurement node needing periodic feedback; confirming that CSI is fed back in different subframes in a time division mode aiming at different nodes during feedback, or feeding back CSI of a plurality of or all nodes in one subframe; and confirming that feedback is carried out in an aggregation mode or feedback is carried out in an independent cell feedback and inter-cell correction information mode aiming at the cooperative measurement node needing non-periodic feedback.
The apparatus is also configured to:
when obtaining a signaling used by a network side for triggering non-periodic feedback of a receiving side, feeding back CSI of all cooperative measurement nodes except a main service node in a measurement set, wherein the feedback mode is as follows: and feeding back in an aggregation feedback mode or an independent cell feedback and inter-cell correction information mode.
The apparatus is also configured to:
when a cooperative measurement node set needing aperiodic feedback is detected in physical layer signaling, a bitmap sequence is detected in downlink aperiodic trigger signaling to obtain cooperative measurement node information needing CSI feedback; 0 and 1 in the bitmap sequence respectively represent whether CSI needs to be fed back or not;
when the feedback mode is detected in the physical layer signaling, the related bit information is detected in the non-periodic trigger signaling to acquire the feedback mode.
The apparatus is a user equipment, UE.
The invention realizes the CSI feedback technology, ensures the independence of periodic feedback and aperiodic feedback, ensures the accuracy of the CSI and reduces standardization effort while ensuring the requirement of a CoMP user on the feedback capacity, and also supports the self-adaptive switching among different CoMP modes.
Drawings
Fig. 1 is a schematic diagram illustrating a principle that a network side notifies a receiving side of an aperiodic feedback measurement set by using a bitmap sequence in an embodiment of the present invention;
FIG. 2 is a simplified flow chart for implementing CSI feedback according to an embodiment of the present invention;
fig. 3 is a simplified flow chart of implementing CSI feedback according to another embodiment of the present invention.
Detailed Description
In practical application, the network side may configure different CoMP measurement sets for periodic feedback and aperiodic feedback respectively through high layer signaling or physical layer signaling, or configure the same CoMP measurement set for periodic feedback and aperiodic feedback.
In the invention, the coordinated multi-point measurement set and the CoMP measurement set can be notified by various means, for example, the notification can be realized by configuring a plurality of sets of CSI-RS configuration information, or configuring a plurality of sets of CSI-RS configuration information and cell identifiers.
For the different CoMP measurement sets, the network side instructs the receiving side to select a node accordingly and applies PUCCH and PUSCH (Physical Uplink Shared Channel) to feed back CSI respectively; and aiming at the same CoMP measurement set, the network side instructs the receiving side to select the same or different nodes in the CoMP measurement set and applies PUCCH and PUSCH to feed back CSI.
The implementation manner may include at least one of the following manners:
the first method is as follows:
the network side configures configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to the receiving side through a high-level signaling, wherein the configuration information of the main service node can enable the receiving side to periodically or aperiodically feed back CSI, and the configuration information of other nodes can only enable the receiving side to aperiodically feed back CSI.
Such as: the configuration information of the main service node enables the receiving side to only periodically feed back the CSI, and the configuration information of other cooperative measurement nodes enables the receiving side to only aperiodically feed back the CSI. If the network side triggers the aperiodic feedback of the receiving side, the receiving side needs to feed back the CSI of all the cooperative measurement nodes in the measurement set except the main service node. The network side can inform the receiving side of the cooperative measurement node needing feedback through high-layer signaling and/or physical layer signaling, and the receiving side can adopt an aggregation feedback mode or an independent cell feedback mode or a mode of feeding back CSI by an independent cell and adding correction information among cells.
Or, the configuration information of the main service node may enable the receiving side to periodically feed back the CSI, and the configuration information of the other cooperative measurement nodes may enable the receiving side to only aperiodically feed back the CSI. If the network side triggers the aperiodic feedback of the receiving side, the receiving side needs to feed back the CSI of all the cooperative measurement nodes in the measurement set. The network side can inform the receiving side of the cooperative measurement node needing feedback through high-layer signaling and/or physical layer signaling, and the receiving side can adopt an aggregation feedback mode or an independent cell feedback mode or a mode of feeding back CSI by an independent cell and adding correction information among cells.
The second method comprises the following steps:
the network side configures a set of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to the receiving side through high-level signaling. When periodic feedback is carried out, the receiving side feeds back the CSI of all nodes in the CoMP measurement set in different subframes according to an independent cell feedback mode or an independent cell feedback mode plus inter-cell correction information mode, or feeds back the CSI of a plurality of or all nodes in one subframe. The network side triggers the aperiodic feedback of the receiving side through a dynamic physical downlink control signaling, and adds a bitmap sequence in the signaling to indicate a CoMP measurement set corresponding to the aperiodic feedback of the receiving side or all nodes therein, wherein the bitmap sequence is a bit string consisting of 0 and 1, can be used for indicating nodes needing the aperiodic feedback in the CoMP measurement set configured by the receiving side in a semi-static manner, and can feed back CSI in an aggregation manner or in an independent cell feedback manner or in a manner of adding correction information between cells in the independent cell feedback manner.
The third method comprises the following steps:
the network side configures two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to the receiving side through a high-level signaling, wherein one set of configuration information is used for indicating periodic feedback of the receiving side, and the other set of configuration information is used for indicating aperiodic feedback of the receiving side. For the cooperative measurement nodes needing periodic feedback, feedback can be performed only in an aggregation mode; for the cooperative measurement node which needs to perform non-periodic feedback, feedback can be performed in an aggregation mode or an independent cell feedback mode or a mode of feeding back the independent cell feedback plus inter-cell correction information.
The method is as follows:
the network side configures two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to the receiving side through a high-level signaling, wherein one set of configuration information is used for indicating periodic feedback of the receiving side, and the other set of configuration information is used for indicating aperiodic feedback of the receiving side. For the cooperative measurement node which needs to be fed back periodically, the feedback can be performed only in an independent cell feedback manner. And feeding back CSI in different subframes by adopting a time division mode aiming at different nodes during feedback, or feeding back CSI of a plurality of or all nodes in one subframe. For the cooperative measurement node which needs to perform non-periodic feedback, the feedback can be performed in an aggregation manner, or the feedback can be performed in an independent cell manner plus correction information between cells.
The fifth mode is as follows:
the network side configures two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to the receiving side through a high-level signaling, wherein one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side. For the cooperative measurement node which needs periodic feedback, feedback can be performed only according to the mode of independent cell feedback plus phase correction. And feeding back CSI in different subframes by adopting a time division mode aiming at different nodes during feedback, or feeding back CSI of a plurality of or all nodes in one subframe. For the cooperative measurement node which needs to perform non-periodic feedback, the feedback can be performed in an aggregation manner or in a non-aggregation manner.
The method six:
the network side configures two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to the receiving side through a high-level signaling, wherein one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side. And feeding back CSI according to the aggregation feedback or independent cell feedback or the mode of adding phase correction to the independent cell feedback aiming at the receiving side needing periodic feedback. And feeding back CSI in different subframes by adopting a time division mode aiming at different nodes during feedback, or feeding back CSI of a plurality of or all nodes in one subframe. For the cooperative measurement node which needs to perform non-periodic feedback, the feedback can be performed in an aggregation manner, or the feedback can be performed in an independent cell manner plus correction information between cells.
It should be noted that, when performing aperiodic feedback, the receiving side needs to feed back CSI of all the cooperative measurement nodes except the main serving node. The network side can inform the receiving side of the cooperative measurement nodes needing to be fed back through high-level signaling and/or physical-layer signaling, and the receiving side feeds back CSI in an aggregation feedback mode or an independent cell feedback mode or a mode of feeding back the CSI by an independent cell and adding correction information among cells.
When the receiving side is informed of the cooperative measurement node needing feedback through the physical layer signaling, a bitmap sequence used for indicating the cooperative measurement node can be added into the control signaling used for triggering non-periodic feedback in the downlink, and 0 and 1 respectively represent whether CSI needs to be fed back or not. When the notification is performed through physical layer signaling, 1 or 2 bits may be added to the control signaling for triggering aperiodic feedback to indicate the feedback manner.
It can be seen that the network side can perform the operations as the flow shown in fig. 2, which includes the following steps:
step 210: the network side configures different CoMP measurement sets for periodic feedback and aperiodic feedback respectively through high-level signaling or physical layer signaling, or configures the same CoMP measurement set for periodic feedback and aperiodic feedback.
Step 220: aiming at the different CoMP measurement sets, the network side instructs the receiving side to select nodes according to the different CoMP measurement sets and feeds back CSI by applying PUCCH and PUSCH respectively; and aiming at the same CoMP measurement set, the network side instructs the receiving side to select the same or different nodes in the CoMP measurement set and applies PUCCH and PUSCH to feed back CSI.
It should be noted that, the entity actually performing the above operation on the network side may be a base station.
Based on the aforementioned operation of the network side, the receiving side may receive the following information: the network side respectively configures different CoMP measurement sets for periodic feedback and aperiodic feedback through high-level signaling or physical layer signaling, or configures the same CoMP measurement set for periodic feedback and aperiodic feedback.
Aiming at the received different CoMP measurement sets, a receiving side selects nodes and respectively applies PUCCH and PUSCH to feed back CSI; and aiming at the same received CoMP measurement set, the receiving side selects the same or different nodes in the CoMP measurement set and feeds back CSI by applying PUCCH and PUSCH.
The implementation manner may include at least one of the following manners:
the first method is as follows:
the receiving side receives the high-level signaling sent by the network side to obtain a set of configuration information of the CoMP measurement set comprising a plurality of cooperative measurement nodes. The receiving side can periodically or aperiodically feed back the CSI according to the configuration information of the main service node, and can only aperiodically feed back the CSI according to the configuration information of the cooperative measurement node.
Such as: and the receiving side can only feed back CSI periodically according to the configuration information of the main service node and can only feed back CSI aperiodically according to the configuration information of other cooperative measurement nodes. If the receiving side obtains the aperiodic feedback signaling used by the network side for triggering the receiving side through blindly detecting the downlink control signaling, the receiving side needs to feed back the CSI of all the cooperative measurement nodes except the main service node in the measurement set. The network side can inform the receiving side of the cooperative measurement node needing feedback through high-layer signaling and/or physical layer signaling, and the receiving side can adopt an aggregation feedback mode or an independent cell feedback mode or a mode of feeding back CSI by an independent cell and adding correction information among cells.
Or the receiving side feeds back the CSI periodically according to the configuration information of the main service node and feeds back the CSI aperiodically according to the configuration information of other cooperative measurement nodes. If the receiving side obtains the aperiodic feedback signaling used by the network side for triggering the receiving side through blindly detecting the downlink control signaling, the receiving side needs to feed back the CSI of all the cooperative measurement nodes in the measurement set. The network side can inform the receiving side of the cooperative measurement node needing feedback through high-layer signaling and/or physical layer signaling, and the receiving side can adopt an aggregation feedback mode or an independent cell feedback mode or a mode of feeding back CSI by an independent cell and adding correction information among cells.
The second method comprises the following steps:
the receiving side receives a high-level signaling sent by the network side to obtain configuration information of a CoMP measurement set comprising a plurality of cooperative measurement nodes, and feeds back CSI in different subframes according to an independent cell feedback mode for all nodes in the CoMP measurement set in a time division mode during periodic feedback. The receiving side detects a physical downlink control signaling to dynamically obtain a signaling triggering non-periodic feedback, and detects a bitmap sequence in the signaling to obtain a CoMP measurement set needing non-periodic feedback, wherein the bitmap sequence is a bit string consisting of 0 and 1 and is used for indicating nodes capable of non-periodic feedback in a semi-statically configured CoMP measurement set. When the aperiodic feedback is performed, for a plurality of cooperative measurement nodes in the CoMP measurement set, the feedback may be performed in an aggregation manner, or in an independent cell feedback manner, or in a manner of feeding back the independent cell and adding inter-cell correction information.
The third method comprises the following steps:
the receiving side receives a high-level signaling sent by the network side to obtain two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes, wherein one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side. For the cooperative measurement nodes needing periodic feedback, feedback can be performed only in an aggregation mode; for the cooperative measurement node which needs to perform non-periodic feedback, feedback can be performed in an aggregation mode or an independent cell feedback mode or a mode of feeding back the independent cell feedback plus inter-cell correction information.
The method is as follows:
the receiving side receives high-level signaling configuration sent by the network side to obtain two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes, wherein one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side. For the cooperative measurement node which needs to perform periodic feedback, feedback can be performed only in an independent cell feedback manner. And feeding back CSI in different subframes by adopting a time division mode aiming at different nodes during feedback, or feeding back CSI of a plurality of or all nodes in one subframe. For the cooperative measurement node which needs to perform non-periodic feedback, the feedback can be performed in an aggregation manner, or the feedback can be performed in an independent cell manner plus correction information between cells.
The fifth mode is as follows:
the receiving side receives a high-level signaling sent by the network side to obtain two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes, wherein one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side. For the cooperative measurement node which needs periodic feedback, feedback can be performed only according to the mode of independent cell feedback plus phase correction. And feeding back CSI in different subframes by adopting a time division mode aiming at different nodes during feedback, or feeding back CSI of a plurality of or all nodes in one subframe. For the cooperative measurement nodes needing non-periodic feedback, the feedback can be performed in an aggregation or non-aggregation manner.
The method six:
the receiving side receives a high-level signaling sent by the network side to obtain two sets of configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes, wherein one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side. For the cooperative measurement node which needs to perform periodic feedback, the feedback can be performed in a manner of aggregate feedback or independent cell feedback plus phase correction. And feeding back CSI in different subframes by adopting a time division mode aiming at different nodes during feedback, or feeding back CSI of a plurality of or all nodes in one subframe. For the cooperative measurement node which needs to perform non-periodic feedback, the feedback can be performed in an aggregation manner, or the feedback can be performed in an independent cell manner plus correction information between cells.
It should be noted that, if the receiving side obtains the signaling used by the network side to trigger the aperiodic feedback of the receiving side, the receiving side needs to feed back the CSI of all the cooperative measurement nodes in the measurement set except the main service node. The network side can inform the receiving side of the cooperative measurement node needing feedback through high-layer signaling and/or physical layer signaling, and the receiving side can adopt an aggregation feedback mode or an independent cell feedback mode or a mode of feeding back the independent cell and adding correction information among the cells for feedback.
When a receiving side detects a cooperative measurement node set needing aperiodic feedback in physical layer signaling, a bitmap sequence can be detected in downlink aperiodic trigger signaling to obtain cooperative measurement node information needing CSI feedback; and 0 and 1 in the bitmap sequence respectively represent whether CSI needs to be fed back or not. When the receiving side detects the feedback mode in the physical layer signaling, the added 1 or 2 bits can be detected in the aperiodic trigger signaling to know the feedback mode.
It can be seen that the receiving side may perform the operations of the flow shown in fig. 3, which includes the following steps:
step 310: the receiving side receives the following information: the network side respectively configures different CoMP measurement sets for periodic feedback and aperiodic feedback through high-level signaling or physical layer signaling, or configures the same CoMP measurement set for periodic feedback and aperiodic feedback.
Step 320: aiming at the received different CoMP measurement sets, a receiving side selects nodes and respectively applies PUCCH and PUSCH to feed back CSI; and aiming at the same received CoMP measurement set, the receiving side selects the same or different nodes in the CoMP measurement set and feeds back CSI by applying PUCCH and PUSCH.
It should be noted that the entity that actually performs the above operation on the receiving side may be a UE.
In order to facilitate an understanding of the invention, the invention is further illustrated below with reference to specific examples.
Example 1
Assuming that the version of the UE1 is R11, the network side may configure a set of configuration information of a CoMP measurement set including multiple cooperative measurement nodes for the UE1 through CSI-RS configuration information, where different CSI-RS configuration information corresponds to different cooperative measurement nodes, and the UE1 may obtain configuration information of a main service node through a cell ID or a sequence of the configuration information of the CSI-RS.
After obtaining the configuration information of the cooperative measurement node, the UE1 periodically feeds back the CSI of the main serving node through the PUCCH or the PUSCH according to the configured feedback format. If the UE obtains the aperiodic feedback trigger signaling sent by the network side when the UE blindly detects the downlink control signaling, the UE feeds back the CSI of all other nodes except the main service node in one or more subsequent subframes. Before the UE aperiodically feeds back CSI of other nodes, it needs to obtain a feedback mode through a high-level signaling or detecting a 1 or 2 bit indication signaling added in a downlink control signaling, where a corresponding relationship between the bits and the feedback mode is shown in table 1. The specific feedback mode may be: aggregate feedback, independent cell feedback plus inter-cell correction information feedback, and the like.
Feedback mode indication bit Feedback mode
00 Independent cell feedback
01 Independent cell feedback plus inter-cell correction information feedback
10 Aggregate feedback
11 Retention (Reserved)
TABLE 1
Example 2
Assuming that the version of the UE1 is R11, the network side may configure a set of configuration information of a CoMP measurement set including multiple cooperative measurement nodes for the UE1 through CSI-RS configuration information, where different CSI-RS configuration information corresponds to different cooperative measurement nodes, and the UE1 may obtain configuration information of a main service node through a cell ID or a sequence of the configuration information of the CSI-RS.
After obtaining the configuration information of the cooperative measurement node, the UE1 periodically feeds back the CSI of the main serving node through the PUCCH or the PUSCH according to the configured feedback format. If the UE obtains the aperiodic feedback trigger signaling sent by the network side when the UE blindly detects the downlink control signaling, the UE feeds back the CSI of all the nodes in one or more subsequent subframes. Before the UE feeds back the CSI of the node aperiodically, the UE needs to obtain a feedback mode through a high-level signaling or detecting a 1 or 2-bit indication signaling added to a downlink control signaling, and may adopt a corresponding method as shown in table 1. The specific feedback mode may be: aggregate feedback, independent cell feedback plus inter-cell correction information feedback, and the like.
Example 3
Assuming that the version of the UE1 is R11, the network side may configure a set of configuration information of a CoMP measurement set including multiple cooperative measurement nodes for the UE1 through CSI-RS configuration information, where different CSI-RS configuration information corresponds to different cooperative measurement nodes, and the UE1 may obtain configuration information of a main service node through a cell ID or a sequence of the configuration information of the CSI-RS.
After obtaining the configuration information of the cooperative measurement node, the UE1 periodically feeds back the CSI of the main serving node through the PUCCH or the PUSCH according to the configured feedback format. If the UE obtains the aperiodic feedback trigger signaling sent by the network side when blindly detecting the downlink control signaling, and learns that the aperiodic feedback measurement node set is needed according to the bitmap sequence contained therein, the UE1 feeds back the corresponding CSI in one or more subsequent subframes according to the obtained aperiodic feedback measurement node set. Before the UE feeds back the CSI of the node aperiodically, the UE needs to obtain a feedback mode through a high-level signaling or detecting a 1 or 2-bit indication signaling added to a downlink control signaling, and may adopt a corresponding method as shown in table 1. The specific feedback mode may be: aggregate feedback, independent cell feedback plus inter-cell correction information feedback, and the like.
Example 4
Assuming that the UE1 has a version of R11, the network side may configure configuration information of a CoMP measurement set including multiple cooperating measurement nodes for the UE1 through CSI-RS configuration information.
After obtaining the configuration information of the cooperative measurement node, the UE1 periodically feeds back CSI of all cells in the cooperative measurement node set through PUCCH or PUSCH in an independent single-cell feedback manner according to the configured feedback format, and may feed back CSI of different cells on the same or different subframes by TDM (time division multiplexing) for different nodes.
If the UE obtains the aperiodic feedback trigger signaling sent by the network side when the UE blindly detects the downlink control signaling, the UE feeds back the CSI of all nodes in the measurement set in an aperiodic feedback mode in one or more subsequent subframes. Before the UE aperiodically feeds back CSI of other nodes, it needs to obtain a feedback mode through a high-level signaling or detecting a 1 or 2-bit indication signaling added in a downlink control signaling, and may adopt a corresponding method as shown in table 1. The specific feedback mode may be: aggregate feedback, independent cell feedback plus inter-cell correction information feedback, and the like.
Example 5
Assuming that the UE1 has a version of R11, the network side may configure configuration information of a CoMP measurement set including multiple cooperating measurement nodes for the UE1 through CSI-RS configuration information.
After obtaining the configuration information of the cooperative measurement node, the UE1 periodically feeds back CSI of all cells in the cooperative measurement node set through PUCCH or PUSCH in an independent single-cell feedback manner according to the configured feedback format, and may feed back CSI of different cells on different subframes by using TDM for different nodes, or feed back CSI of multiple or all cells on the same subframe.
If the UE obtains the aperiodic feedback trigger signaling sent by the network side when blindly detecting the downlink control signaling, and learns that the aperiodic feedback measurement node set is needed according to the bitmap sequence contained therein, the UE1 feeds back the corresponding CSI in one or more subsequent subframes according to the obtained aperiodic feedback measurement node set. Before the UE feeds back the CSI of the node aperiodically, the UE needs to obtain a feedback mode through a high-level signaling or detecting a 1 or 2-bit indication signaling added to a downlink control signaling, and may adopt a corresponding method as shown in table 1. The specific feedback mode may be: aggregate feedback, independent cell feedback plus inter-cell correction information feedback, and the like.
Example 6
Assuming that the UE1 has a version of R11, the network side may configure configuration information of a CoMP measurement set including multiple cooperating measurement nodes for the UE1 through CSI-RS configuration information.
After obtaining the configuration information of the cooperative measurement node, the UE1 periodically feeds back CSI of all cells in the cooperative measurement node set through PUCCH or PUSCH in a manner of independent single cell feedback plus inter-cell correction information according to the configured feedback format, and may feed back CSI of different cells on different subframes by adopting TDM for different nodes, or feed back CSI of multiple or all cells on the same subframe.
If the UE obtains the aperiodic feedback trigger signaling sent by the network side when the UE blindly detects the downlink control signaling, the UE feeds back the CSI of all nodes in the measurement set in an aperiodic feedback mode in one or more subsequent subframes. Before the UE aperiodically feeds back CSI of other nodes, it needs to obtain a feedback mode through a high-level signaling or detecting a 1 or 2-bit indication signaling added in a downlink control signaling, and may adopt a corresponding method as shown in table 1. The specific feedback mode may be: aggregate feedback, independent cell feedback plus inter-cell correction information feedback, and the like.
Example 7
Assuming that the UE1 has a version of R11, the network side may configure configuration information of a CoMP measurement set including multiple cooperating measurement nodes for the UE1 through CSI-RS configuration information.
After obtaining the configuration information of the cooperative measurement node, the UE1 periodically feeds back CSI of all cells in the cooperative measurement node set through PUCCH or PUSCH in a manner of independent single cell feedback plus inter-cell correction information according to the configured feedback format, and may feed back CSI of different cells on different subframes by adopting TDM for different nodes, or feed back CSI of multiple or all cells on the same subframe.
If the UE obtains the aperiodic feedback trigger signaling sent by the network side when blindly detecting the downlink control signaling, and learns that the aperiodic feedback measurement node set is needed according to the bitmap sequence contained therein, the UE1 feeds back the corresponding CSI in one or more subsequent subframes according to the obtained aperiodic feedback measurement node set. Before the UE feeds back the CSI of the node aperiodically, the UE needs to obtain a feedback mode through a high-level signaling or detecting a 1 or 2-bit indication signaling added to a downlink control signaling, and may adopt a corresponding method as shown in table 1. The specific feedback mode may be: aggregate feedback, independent cell feedback plus inter-cell correction information feedback, and the like.
Example 8
Assuming that the version of the UE1 is R11, the network side may configure two sets of configuration information of a CoMP measurement set including multiple cooperative measurement nodes for the UE1 through CSI-RS configuration information, where different CSI-RS configuration information in each set of configuration information corresponds to different cooperative measurement nodes. One set of configuration information is used for periodic feedback of a receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side.
The UE1 may obtain a measurement set requiring periodic feedback and a measurement set requiring aperiodic feedback. After obtaining the configuration information of the cooperative measurement node that needs to be fed back periodically, the UE1 feeds back the aggregated CSI of all cells in the cooperative measurement node set periodically through the PUCCH or the PUSCH in an aggregated manner according to the configured feedback format.
If the UE obtains the aperiodic feedback trigger signaling sent by the network side when the UE blindly detects the downlink control signaling, the UE feeds back the CSI of all nodes in the measurement set in an aperiodic feedback mode in one or more subsequent subframes. Before the UE aperiodically feeds back CSI of other nodes, it needs to obtain a feedback mode through a high-level signaling or detecting a 1 or 2-bit indication signaling added in a downlink control signaling, and may adopt a corresponding method as shown in table 1. The specific feedback mode may be: aggregate feedback, independent cell feedback plus inter-cell correction information feedback, and the like.
Example 9
Assuming that the version of the UE1 is R11, the network side may configure two sets of configuration information of a CoMP measurement set including multiple cooperative measurement nodes for the UE1 through CSI-RS configuration information, where different CSI-RS configuration information in each set of configuration information corresponds to different cooperative measurement nodes, one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side.
The UE1 may obtain a measurement set requiring periodic feedback and a measurement set requiring aperiodic feedback. After obtaining the configuration information of the cooperative measurement node that needs to be fed back periodically, the UE1 feeds back the aggregated CSI of all cells in the cooperative measurement node set periodically through the PUCCH or the PUSCH in an aggregated manner according to the configured feedback format.
If the UE obtains the aperiodic feedback trigger signaling sent by the network side when blindly detecting the downlink control signaling, and learns that the aperiodic feedback measurement node set is needed according to the bitmap sequence contained therein, the UE1 feeds back the corresponding CSI in one or more subsequent subframes according to the obtained aperiodic feedback measurement node set. Before the UE feeds back the CSI of the node aperiodically, the UE needs to obtain a feedback mode through a high-level signaling or detecting a 1 or 2-bit indication signaling added to a downlink control signaling, and may adopt a corresponding method as shown in table 1. The specific feedback mode may be: aggregate feedback, independent cell feedback plus inter-cell correction information feedback, and the like.
Example 10
Assuming that the version of the UE1 is R11, the network side may configure two sets of configuration information of a CoMP measurement set including multiple cooperative measurement nodes for the UE1 through CSI-RS configuration information, where different CSI-RS configuration information in each set of configuration information corresponds to different cooperative measurement nodes, one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side.
The UE1 may obtain a measurement set requiring periodic feedback and a measurement set requiring aperiodic feedback. After obtaining the configuration information of the cooperative measurement node that needs to be fed back periodically, the UE1 feeds back CSI of all cells in the cooperative measurement node set periodically through PUCCH or PUSCH in an independent cell feedback manner according to the configured feedback format. The CSI of different cells may be fed back on different subframes using TDM for different nodes, or the CSI of multiple or all cells may be fed back on the same subframe.
If the UE obtains the aperiodic feedback trigger signaling sent by the network side when the UE blindly detects the downlink control signaling, the UE feeds back the CSI of all nodes in the measurement set in an aperiodic feedback mode in one or more subsequent subframes. Before the UE feeds back the CSI of the node aperiodically, the UE needs to obtain a feedback mode through a high-level signaling or detecting a 1 or 2-bit indication signaling added to a downlink control signaling, and may adopt a corresponding method as shown in table 1. The specific feedback mode may be: aggregate feedback, independent cell feedback plus inter-cell correction information feedback, and the like.
Example 11
Assuming that the version of the UE1 is R11, the network side may configure two sets of configuration information of a CoMP measurement set including multiple cooperative measurement nodes for the UE1 through CSI-RS configuration information, where different CSI-RS configuration information in each set of configuration information corresponds to different cooperative measurement nodes, one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side.
The UE1 may obtain a measurement set requiring periodic feedback and a measurement set requiring aperiodic feedback. After obtaining the configuration information of the cooperative measurement node that needs to be fed back periodically, the UE1 feeds back CSI of all cells in the cooperative measurement node set periodically through PUCCH or PUSCH in an independent cell feedback manner according to the configured feedback format. The CSI of different cells may be fed back on different subframes using TDM for different nodes, or the CSI of multiple or all cells may be fed back on the same subframe.
If the UE obtains the aperiodic feedback trigger signaling sent by the network side when blindly detecting the downlink control signaling, and learns that the aperiodic feedback measurement node set is needed according to the bitmap sequence contained therein, the UE1 feeds back the corresponding CSI in one or more subsequent subframes according to the obtained aperiodic feedback measurement node set. Before the UE feeds back the CSI of the node aperiodically, the UE needs to obtain a feedback mode through a high-level signaling or detecting a 1 or 2-bit indication signaling added to a downlink control signaling, and may adopt a corresponding method as shown in table 1. The specific feedback mode may be: aggregate feedback, independent cell feedback plus inter-cell correction information feedback, and the like.
Example 12
Assuming that the version of the UE1 is R11, the network side may configure two sets of configuration information of a CoMP measurement set including multiple cooperative measurement nodes for the UE1 through CSI-RS configuration information, where different CSI-RS configuration information in each set of configuration information corresponds to different cooperative measurement nodes, one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side.
The UE1 may obtain a measurement set requiring periodic feedback and a measurement set requiring aperiodic feedback. After obtaining the configuration information of the cooperative measurement nodes that need to be fed back periodically, the UE1 feeds back CSI of all cells in the cooperative measurement node set periodically through PUCCH or PUSCH in a manner of independent cell feedback plus inter-cell correction information according to the configured feedback format. The CSI of different cells may be fed back on different subframes using TDM for different nodes, or the CSI of multiple or all cells may be fed back on the same subframe.
If the UE obtains the aperiodic feedback trigger signaling sent by the network side when the UE blindly detects the downlink control signaling, the UE feeds back the CSI of all nodes in the measurement set in an aperiodic feedback mode in one or more subsequent subframes. Before the UE feeds back the CSI of the node aperiodically, the UE needs to obtain a feedback mode through a high-level signaling or detecting a 1 or 2-bit indication signaling added to a downlink control signaling, and may adopt a corresponding method as shown in table 1. The specific feedback mode may be: aggregate feedback, independent cell feedback plus inter-cell correction information feedback, and the like.
Example 13
Assuming that the version of the UE1 is R11, the network side may configure two sets of configuration information of a CoMP measurement set including multiple cooperative measurement nodes for the UE1 through CSI-RS configuration information, where different CSI-RS configuration information in each set of configuration information corresponds to different cooperative measurement nodes, one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side.
The UE1 may obtain a measurement set requiring periodic feedback and a measurement set requiring aperiodic feedback. After obtaining the configuration information of the cooperative measurement nodes that need to be fed back periodically, the UE1 feeds back CSI of all cells in the cooperative measurement node set periodically through PUCCH or PUSCH in a manner of independent cell feedback plus inter-cell correction information according to the configured feedback format. The CSI of different cells may be fed back on different subframes using TDM for different nodes, or the CSI of multiple or all cells may be fed back on the same subframe.
If the UE obtains the aperiodic feedback trigger signaling sent by the network side when blindly detecting the downlink control signaling, and learns that the aperiodic feedback measurement node set is needed according to the bitmap sequence contained therein, the UE1 feeds back the corresponding CSI in one or more subsequent subframes according to the obtained aperiodic feedback measurement node set. Before the UE feeds back the CSI of the node aperiodically, the UE needs to obtain a feedback mode through a high-level signaling or detecting a 1 or 2-bit indication signaling added to a downlink control signaling, and may adopt a corresponding method as shown in table 1. The specific feedback mode may be: aggregate feedback, independent cell feedback plus inter-cell correction information feedback, and the like.
Example 14
Assuming that the version of the UE1 is R11, the network side may configure two sets of configuration information of a CoMP measurement set including multiple cooperative measurement nodes for the UE1 through CSI-RS configuration information, where different CSI-RS configuration information in each set of configuration information corresponds to different cooperative measurement nodes, one set of configuration information is used for periodic feedback of the receiving side, and the other set of configuration information is used for aperiodic feedback of the receiving side.
The UE1 may obtain a measurement set requiring periodic feedback and a measurement set requiring aperiodic feedback. After obtaining the configuration information of the cooperative measurement node that needs to be fed back periodically, the UE1 feeds back CSI of all cells in the cooperative measurement node set periodically through PUCCH or PUSCH in a manner of aggregate feedback, independent cell feedback, or independent cell feedback plus inter-cell correction information according to the configured feedback format. The CSI of different cells may be fed back on different subframes using TDM for different nodes, or the CSI of multiple or all cells may be fed back on the same subframe.
If the UE obtains the aperiodic feedback trigger signaling sent by the network side when blindly detecting the downlink control signaling, and learns that the aperiodic feedback measurement node set is needed according to the bitmap sequence contained therein, the UE1 feeds back the corresponding CSI in one or more subsequent subframes according to the obtained aperiodic feedback measurement node set. Before the UE feeds back the CSI of the node aperiodically, the UE needs to obtain a feedback mode through a high-level signaling or detecting a 1 or 2-bit indication signaling added to a downlink control signaling, and may adopt a corresponding method as shown in table 1. The specific feedback mode may be: aggregate feedback, independent cell feedback plus inter-cell correction information feedback, and the like.
In summary, the present invention realizes the CSI feedback technology, and ensures independence of periodic feedback and aperiodic feedback, thereby ensuring the feedback capacity requirement of the CoMP user, ensuring the CSI accuracy, reducing standardization effort, and supporting adaptive switching between different CoMP modes, regardless of the method or the devices on the network side and the receiving side.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (8)

1. A method for realizing Channel State Information (CSI) feedback is characterized in that a network side performs the following operations through high-level signaling:
configuring a same set of coordinated multi-point (CoMP) measurement set for periodic feedback and aperiodic feedback to indicate a receiving side to select the same or different nodes in the CoMP measurement set and apply a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH) to feed back CSI; the configuration of the same set of CoMP measurement sets is as follows:
the network side configures configuration information of a CoMP measurement set containing a plurality of cooperative measurement nodes to a receiving side through a high-level signaling, wherein the configuration information of the main service node enables the receiving side to periodically or aperiodically feed back CSI of the main service node, and the configuration information of other cooperative measurement nodes enables the receiving side to only aperiodically feed back CSI of corresponding cooperative measurement nodes.
2. The method of claim 1, further comprising:
the configuration information of the main service node enables a receiving side to only periodically feed back CSI of the main service node;
when the network side triggers the non-periodic feedback of the receiving side, the receiving side is triggered to feed back the CSI of all the cooperative measurement nodes except the main service node in the measurement set;
the network side informs a receiving side of a cooperative measurement node needing feedback through a high-level signaling and/or a physical layer signaling, and triggers the receiving side to feed back CSI in an aggregation feedback mode or an independent cell feedback mode or a mode of feeding back the CSI by an independent cell and adding correction information among cells;
or, the configuration information of the main service node enables the receiving side to periodically feed back the CSI of the main service node;
when the network side triggers the non-periodic feedback of the receiving side, the receiving side is triggered to feed back the CSI of all the cooperative measurement nodes in the measurement set;
the network side informs the receiving side of the cooperative measurement nodes needing to be fed back through high-level signaling and/or physical-layer signaling, and triggers the receiving side to feed back the CSI in an aggregation feedback mode or an independent cell feedback mode or a mode of feeding back the CSI by the independent cell and adding correction information among the cells.
3. The method of claim 1, further comprising:
when non-periodic feedback is needed, indicating a receiving side to feed back CSI of all cooperative measurement nodes except a main service node;
and/or the network side informs the receiving side of the cooperative measurement node needing feedback through high-level signaling and/or physical-layer signaling, and instructs the receiving side to feed back CSI in an aggregation feedback mode or an independent cell feedback mode or a mode of adding correction information between cells to the feedback of the independent cell.
4. The method of claim 3, further comprising:
when a receiving side is informed of a cooperative measurement node needing feedback through a physical layer signaling, a bitmap sequence used for indicating the cooperative measurement node is added into a control signaling used for triggering non-periodic feedback in a downlink, and 0 and 1 respectively represent whether CSI needs to be fed back or not;
when the notification is carried out through the physical layer signaling, 1 or 2 bits are added into the control signaling for triggering the non-periodic feedback of the downlink to indicate a feedback mode; the feedback mode is as follows: and feeding back CSI in an aggregation feedback mode or an independent cell feedback and inter-cell correction information mode.
5. A method for implementing CSI feedback, the method comprising,
the receiving side receives the following information: configuring the same set of multi-point cooperative CoMP measurement set for periodic feedback and aperiodic feedback;
aiming at the same received CoMP measurement set, a receiving side selects the same or different nodes in the CoMP measurement set and feeds back CSI by applying a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH); the receiving side receives information as follows:
a receiving side receives a high-level signaling sent by a network side to obtain configuration information of a CoMP measurement set comprising a plurality of cooperative measurement nodes; and confirming that the CSI of the main service node is fed back periodically or aperiodically according to the configuration information of the main service node, and confirming that the CSI of the corresponding cooperative measurement node can only be fed back aperiodically according to the configuration information of other cooperative measurement nodes.
6. The method of claim 5, further comprising:
the receiving side confirms that the CSI of the main service node can only be fed back periodically according to the configuration information of the main service node; the receiving side obtains a physical layer downlink control signaling used for triggering non-periodic feedback of the receiving side by a network side through blind detection of the physical layer downlink control signaling, and feeds back CSI of all cooperative measurement nodes except a main service node in a measurement set, wherein the feedback mode is as follows: feeding back CSI in an aggregation feedback mode or an independent cell feedback mode or a mode of feeding back the CSI by an independent cell and adding correction information among cells;
or the receiving side confirms that the CSI of the main service node can be fed back periodically according to the configuration information of the main service node; the receiving side obtains a physical layer downlink control signaling used for triggering non-periodic feedback of the receiving side by a network side through blind detection of the physical layer downlink control signaling, and feeds back CSI of all cooperative measurement nodes in a measurement set, wherein the feedback mode is as follows: and feeding back CSI in an aggregation feedback mode or an independent cell feedback and inter-cell correction information mode.
7. The method of claim 5, further comprising:
when a receiving side obtains a physical layer downlink control signaling which is used by a network side for triggering non-periodic feedback of the receiving side, the receiving side feeds back CSI of all cooperative measurement nodes except a main service node in a measurement set, and the feedback mode is as follows: and feeding back in an aggregation feedback mode or an independent cell feedback and inter-cell correction information mode.
8. The method of claim 6, further comprising:
when a receiving side detects a cooperative measurement node set needing aperiodic feedback in the physical layer downlink control signaling, a bitmap sequence is detected in the physical layer downlink control signaling to obtain cooperative measurement node information needing feedback of CSI information; 0 and 1 in the bitmap sequence respectively represent whether CSI needs to be fed back or not;
when the receiving side detects the feedback mode in the physical layer downlink control signaling, the receiving side detects the relevant bit information in the physical layer downlink control signaling to acquire the feedback mode.
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