CN111757515B - Method, device and base station for realizing multi-TRP transmission - Google Patents

Method, device and base station for realizing multi-TRP transmission Download PDF

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Publication number
CN111757515B
CN111757515B CN201910249918.2A CN201910249918A CN111757515B CN 111757515 B CN111757515 B CN 111757515B CN 201910249918 A CN201910249918 A CN 201910249918A CN 111757515 B CN111757515 B CN 111757515B
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bwp
base stations
activation information
ids
related activation
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CN111757515A (en
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杨毅
蔡红亮
王钰华
马大为
王化磊
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Spreadtrum Semiconductor Nanjing Co Ltd
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Spreadtrum Semiconductor Nanjing Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/121—Wireless traffic scheduling for groups of terminals or users
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points

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

Abstract

The invention provides a method, a device and a base station for realizing multi-TRP transmission. The method comprises the following steps: acquiring related activation information of BWP of scheduled UE; and sending the related activation information of the BWP to other base stations in the communication with other base stations. The present invention can ensure that multiple TRPs can activate the same BWP simultaneously.

Description

Method, device and base station for realizing multi-TRP transmission
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method, an apparatus, and a base station for implementing multiple TRP transmissions.
Background
In the RAN1#96 conference forming chairman conference record, for a UE (User Equipment) supporting multiple TRP (Transmission/Reception Point) based on multiple PDCCHs (Physical Downlink Control channels), each PDCCH schedules a PDSCH (Physical Downlink Shared Channel), at least for an Enhanced Mobile Broadband (eMBB) service of a non-ideal backhaul, the following limitations are supported:
the UE may use full/partial/non-overlapping PDSCHs in time and frequency domains with multiple PDCCHs scheduling, but with the following limitations:
(1) If the UE can schedule PDSCHs using full/partial overlap in time and frequency domains with multiple PDCCHs, the UE may not expect the number of actual front-loaded DMRS (Demodulation Reference Signal) symbols, the number of additional DMRS symbols, the actual DMRS symbol positions, and the DMRS configuration types to be different.
(2) If the UE expects to receive multiple PDSCHs at the same time at a given symbol, the UE expects to use the same active BWP (Bandwidth Part) Bandwidth and the same subcarrier spacing.
(3) On each carrier, there is only one active BWP for one UE.
However, it is a state of interest to ensure that multiple TRPs can activate the same BWP simultaneously.
In the current release of NR, for normally scheduled resources, the UE can only be informed of the activated BWP by the way indicated in DCI1_1, which can support multiple gnbs to activate the same BWP well in an ideal backhaul (without backhaul delay), but in a non-ideal backhaul, there is no guarantee that the same BWP can be activated simultaneously between the gnbs due to the delay.
Disclosure of Invention
The method, the device and the base station for realizing multi-TRP transmission provided by the invention can ensure that a plurality of TRPs can simultaneously activate the same BWP.
In a first aspect, the present invention provides a method for implementing multiple TRP transmission, where the method is applied to a base station, and the method includes:
acquiring related activation information of BWP of scheduled UE;
transmitting the BWP-related activation information to other base stations in communication with the other base stations.
Optionally, if the base stations do not know the bandwidth, frequency domain position and subcarrier spacing of the pre-activated BWP, the related activation information of the BWP of the scheduled UE includes: the pre-activation BWP ID, the bandwidth, frequency domain position and subcarrier spacing of the pre-activation BWP, and the UE ID, cell ID, BWP starting system frame number, BWP ending system frame number, BWP starting subframe number and BWP ending subframe number.
Optionally, if the base stations know the bandwidth, frequency-domain position and subcarrier spacing of the pre-activated BWP, the activation information related to the BWP of the scheduled UE includes: a pre-activation BWP ID, a UE ID, a cell ID, a BWP start system frame number, a BWP end system frame number, a BWP start subframe number, and a BWP end subframe number.
Optionally, the cell ID includes a source cell ID and a target cell ID.
Optionally, the sending the BWP related activation information to other base stations includes: configuring different total IDs for related activation information including different pre-activated BWP IDs and/or different UE IDs, sending the total IDs to other base stations, and acquiring all information in the related activation information of the BWP according to the total IDs.
Optionally, the sending the BWP related activation information to other base stations includes: and sending the related activation information of the BWP to other base stations through XnAP communication of an Xn interface between the other base stations.
In a second aspect, the present invention provides an apparatus for implementing multiple TRP transmission, where the apparatus is located at a base station, and the apparatus includes:
an obtaining unit, configured to obtain activation information related to BWP of a scheduled UE;
a sending unit, configured to send the BWP related activation information to other base stations in communication with the other base stations.
Optionally, if the base stations do not know the bandwidth, frequency domain position and subcarrier spacing of the pre-activated BWP, the related activation information of the BWP of the scheduled UE includes: the pre-activation BWP ID, the bandwidth, frequency domain position and subcarrier spacing of the pre-activation BWP, and the UE ID, cell ID, BWP starting system frame number, BWP ending system frame number, BWP starting subframe number and BWP ending subframe number.
Optionally, if the base stations know the bandwidth, frequency domain position and subcarrier spacing of the pre-activated BWP from each other, the related activation information of the BWP of the scheduled UE includes: a pre-activation BWP ID, a UE ID, a cell ID, a BWP start system frame number, a BWP end system frame number, a BWP start subframe number, and a BWP end subframe number.
Optionally, the cell ID includes a source cell ID and a target cell ID.
Optionally, the sending unit is configured to configure different total IDs for related activation information including different pre-activated BWP IDs and/or different UE IDs, send the total IDs to other base stations, and learn all information in the related activation information of BWP according to the total IDs.
Optionally, the sending unit is configured to send the BWP related activation information to another base station through XnAP communication over an Xn interface between the BWP and the other base station.
In a third aspect, the present invention provides a base station, where the base station includes the apparatus for implementing multiple TRP transmission.
The method, the device and the base station for realizing multi-TRP transmission provided by the embodiment of the invention acquire the related activation information of the BWP of the scheduled UE, and send the related activation information of the BWP to other base stations in the communication with other base stations, so that the base stations can know the pre-activated BWP of the scheduled UE mutually, and the same BWP can be ensured to be activated by a plurality of TRPs at the same time.
Drawings
Fig. 1 is a flowchart of an implementation method of multiple TRP transmission according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an apparatus for implementing multiple TRP transmission according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a method for implementing multiple TRP transmissions, where the method is applied to a base station, and as shown in fig. 1, the method includes:
s11, acquiring the BWP related activation information of the scheduled UE.
And S12, transmitting the related activation information of the BWP to other base stations in the communication with other base stations.
The method for realizing multi-TRP transmission provided by the embodiment of the invention acquires the related activation information of the BWP of the scheduled UE, and sends the related activation information of the BWP to other base stations in the communication with other base stations, so that the base stations can know the pre-activated BWP of the scheduled UE mutually, and a plurality of TRPs can be ensured to simultaneously activate the same BWP.
The following describes the implementation method of multi-TRP transmission according to the embodiment of the present invention in detail.
In the XnAP communication of the Xn interface between the gNBs, UE ACTIVE BWP is added, and each gNB knows the following information of the scheduled UE:
if the gNBs do not know the bandwidth, frequency domain position and subcarrier spacing of the pre-activated BWP, each gNB knows the pre-activated BWP ID, bandwidth, frequency domain position and subcarrier spacing of the UE scheduled by each other, and also knows the UE ID, cell ID, BWP starting system frame number, BWP ending system frame number, BWP starting subframe number and BWP ending subframe number.
If the gNBs know the bandwidth, frequency domain position and subcarrier spacing of the pre-activated BWP, each gNB knows the pre-activated BWP ID, UE ID, cell ID, BWP starting system frame number, BWP ending system frame number, BWP starting subframe number and BWP ending subframe number of the UE scheduled by each other.
Wherein the cell ID includes a source cell ID and a target cell ID.
Optionally, each gNB may configure a different total ID for the related activation information including different pre-activation BWP IDs and/or different UE IDs, and send the total ID to other gnbs, where each gNB may learn all information in the related activation information of BWP according to the total ID.
For example, for gNB 1, in the relevant activation information of BWP of scheduled UE, UE ID is 1, ID of pre-activated BWP is 1, BWP starting system frame number is 1, ending system frame number is 9, gNB 1 configures a total ID of 1 for the relevant activation information; for the gNB2, in the related activation information of the BWP of the scheduled UE, the UE ID is 1, the pre-activated BWP ID is 2, the BWP starting system frame number is 11, the ending system frame number is 20, and the gNB2 gives a total ID of 2 to the related activation information; for gNB 3, in the related activation information of BWP of the scheduled UE, the UE ID is 2, the ID of the pre-activated BWP is 1, the initial system frame number of BWP is 1, the ending system frame number is 9, and gNB 3 gives a total ID of 3 to the related activation information. gNB 1, gNB2, and gNB 3 transmit the total IDs 1, 2, 3, respectively, to each other, so that each gNB can know the pre-activated BWP of the UEs scheduled by each other according to the received total ID.
An embodiment of the present invention further provides a device for implementing multiple TRP transmission, where the device is located in a base station, and as shown in fig. 2, the device includes:
an obtaining unit 11, configured to obtain activation information related to BWP of a scheduled UE;
a sending unit 12, configured to send the BWP related activation information to other base stations in communication with the other base stations.
The device for realizing multi-TRP transmission provided by the embodiment of the invention acquires the related activation information of the BWP of the scheduled UE, and sends the related activation information of the BWP to other base stations in the communication with other base stations, so that the base stations can know the pre-activated BWP of the scheduled UE mutually, and the same BWP can be ensured to be simultaneously activated by a plurality of TRPs.
Optionally, if the base stations do not know the bandwidth, frequency domain position and subcarrier spacing of the pre-activated BWP, the related activation information of the BWP of the scheduled UE includes: the pre-activation BWP ID, the bandwidth, frequency domain position and subcarrier spacing of the pre-activation BWP, and the UE ID, cell ID, BWP starting system frame number, BWP ending system frame number, BWP starting subframe number and BWP ending subframe number.
Optionally, if the base stations know the bandwidth, frequency domain position and subcarrier spacing of the pre-activated BWP from each other, the related activation information of the BWP of the scheduled UE includes: a pre-activation BWP ID, a UE ID, a cell ID, a BWP start system frame number, a BWP end system frame number, a BWP start subframe number, and a BWP end subframe number.
Optionally, the cell ID includes a source cell ID and a target cell ID.
Optionally, the sending unit 12 is configured to configure different total IDs for related activation information including different pre-activation BWP IDs and/or different UE IDs, send the total IDs to other base stations, and learn all information in the related activation information of BWP according to the total IDs.
Optionally, the sending unit 12 is configured to send the BWP related activation information to another base station through XnAP communication over an Xn interface between the BWP and the other base station.
The apparatus of this embodiment may be configured to implement the technical solutions of the method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
The embodiment of the invention also provides a base station which comprises the device for realizing the multi-TRP transmission.
It will be understood by those skilled in the art that all or part of the processes of the embodiments of the methods described above may be implemented by a computer program, which may be stored in a computer-readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (9)

1. A method for realizing multiple TRP transmission is applied to a base station, and is characterized in that the method comprises the following steps:
acquiring related activation information of BWP of scheduled UE;
transmitting the BWP-related activation information to other base stations in communication with the other base stations;
if the base stations do not know the bandwidth, frequency domain position and subcarrier spacing of the pre-activated BWPs, the activation information related to the BWPs of the scheduled UE includes: pre-activating BWP ID, bandwidth, frequency domain position and subcarrier interval of the pre-activating BWP, UE ID, cell ID, BWP starting system frame number, BWP ending system frame number, BWP starting subframe number and BWP ending subframe number;
if the base stations know the bandwidth, frequency domain position and subcarrier spacing of the pre-activated BWP from each other, the related activation information of the BWP of the scheduled UE includes: a pre-activation BWP ID, a UE ID, a cell ID, a BWP start system frame number, a BWP end system frame number, a BWP start subframe number, and a BWP end subframe number.
2. The method of claim 1, wherein the cell ID comprises a source cell ID and a target cell ID.
3. The method of claim 1, wherein sending the BWP related activation information to other base stations comprises: configuring different total IDs for related activation information including different pre-activation BWP IDs and/or different UE IDs, sending the total IDs to other base stations, and acquiring all information in the related activation information of BWP according to the total IDs.
4. The method of claim 1, wherein sending the BWP related activation information to other base stations comprises: and sending the related activation information of the BWP to other base stations through XnAP communication of an Xn interface between the other base stations.
5. An apparatus for implementing multiple TRP transmissions, the apparatus being located at a base station, the apparatus comprising:
an obtaining unit, configured to obtain BWP related activation information of a scheduled UE;
a transmitting unit, configured to transmit the BWP related activation information to other base stations in communication with the other base stations;
if the base stations do not know the bandwidth, frequency domain position and subcarrier spacing of the pre-activated BWPs, the activation information related to the BWPs of the scheduled UE includes: preactivating BWPID, preactivating bandwidth, frequency domain position and subcarrier interval of BWP, UE ID, cell ID, BWP starting system frame number, BWP ending system frame number, BWP starting subframe number and BWP ending subframe number;
if the base stations know the bandwidth, frequency domain position and subcarrier spacing of the pre-activated BWP from each other, the related activation information of the BWP of the scheduled UE includes: a pre-activation BWP ID, a UE ID, a cell ID, a BWP start system frame number, a BWP end system frame number, a BWP start subframe number, and a BWP end subframe number.
6. The apparatus of claim 5, wherein the cell ID comprises a source cell ID and a target cell ID.
7. The apparatus of claim 5, wherein the sending unit is configured to configure different total IDs for related activation information including different pre-activation BWP IDs and/or different UE IDs, and send the total IDs to other base stations, and all information in the related activation information of BWP can be known according to the total IDs.
8. The apparatus of claim 5, wherein the sending unit is configured to send the BWP related activation information to other base stations through XnAP communication over an Xn interface between the other base stations.
9. A base station characterized in that it comprises means for implementing a multi-TRP transmission according to any one of claims 5 to 8.
CN201910249918.2A 2019-03-29 2019-03-29 Method, device and base station for realizing multi-TRP transmission Active CN111757515B (en)

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WO2022094938A1 (en) * 2020-11-06 2022-05-12 Qualcomm Incorporated Multi-transmission reception point transmission schemes with partially overlapping resources
CN114585096B (en) * 2022-05-05 2022-10-18 深圳国人无线通信有限公司 Method and system for reducing interference through BWP switching function

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KR20150090579A (en) * 2014-01-29 2015-08-06 주식회사 팬택 Method for Transmitting and Receiving Control Information, Base Station, and User Equipment
CN107147482A (en) * 2016-03-01 2017-09-08 中兴通讯股份有限公司 The control method, system and base station of deactivation are activated in carrier aggregation

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CN109788558A (en) * 2017-11-14 2019-05-21 北京展讯高科通信技术有限公司 Partial carrier wave bandwidth activation/anti-activating method, device and base station

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150090579A (en) * 2014-01-29 2015-08-06 주식회사 팬택 Method for Transmitting and Receiving Control Information, Base Station, and User Equipment
CN107147482A (en) * 2016-03-01 2017-09-08 中兴通讯股份有限公司 The control method, system and base station of deactivation are activated in carrier aggregation

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