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WO2018211407A1 - Procédé et nœud permettant de réduire une interférence de liaison transversale dans un réseau de communication - Google Patents

Procédé et nœud permettant de réduire une interférence de liaison transversale dans un réseau de communication Download PDF

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Publication number
WO2018211407A1
WO2018211407A1 PCT/IB2018/053362 IB2018053362W WO2018211407A1 WO 2018211407 A1 WO2018211407 A1 WO 2018211407A1 IB 2018053362 W IB2018053362 W IB 2018053362W WO 2018211407 A1 WO2018211407 A1 WO 2018211407A1
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WO
WIPO (PCT)
Prior art keywords
network node
measurements
determining
threshold
operative
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2018/053362
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English (en)
Inventor
Du Ho Kang
Havish Koorapaty
Sorour Falahati
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of WO2018211407A1 publication Critical patent/WO2018211407A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames

Definitions

  • NR New Radio
  • 5G 5th Generation
  • a base-station can be referred to as a gNB instead of an eNodeB (eNB).
  • eNB eNodeB
  • TRP Transmission- Receive-Point
  • Figure 1 illustrates the performance benefit of dynamic TDD in NR compared to traditional fixed TDD operation in LTE.
  • different legends represent a different file size and TRP is the same terminology as the traditional eNB in LTE.
  • the scenario for evaluations is NR indoor open office with 3 TRPs.
  • dynamic TDD operation will bring significant performance gain at the low to medium load as compared to the traditional fixed TDD in LTE, as shown in Figure 1. This is because dynamic TDD does not have any restriction on the usages of time domain resources in a certain time period.
  • Figure 2 illustrates an example of the cross-link interference problem.
  • UE1 in downlink experiences very strong interference from UE2 which can be closer to UE1 than the serving API (Access point 1) is.
  • AP2 Access point 2
  • AP2 will also experience interference from API since API is transmitting.
  • Handling this cross-link interference at high load is one important task in order to ensure gains from dynamic TDD operation at higher loads. This is the reason that, in the example of Figure 1 described above, the dynamic TDD performance is getting similar to the static TDD for higher traffic loads.
  • a simple solution to minimize the cross-link interference can be defining signaling between APs. However, real-time signaling usually requires overhead and complexity in equipment. Therefore, there is a need for an improved approach for cross-link interference management.
  • each AP decides whether to use a pre-determined pattern for allocation of resources for DL and UL transmissions or perform the resource allocation dynamically based on whether one or multiple conditions are met. For example, the conditions to switch between a pre-determined pattern or dynamic allocation can be based on the buffer status and measurements on signal(s) strength available at the AP, where the measurements can be done at the AP, UEs or both.
  • the cross-link interference is avoided by optimally choosing a transmission direction in R dynamic TDD systems, based on local measurements either in the AP or UE together with the buffer status.
  • R dynamic TDD systems provide a decision making in each cell level without requiring dynamic signaling between nodes. Also, they still capture the dynamic TDD, since they fully exploit the whole resources when traffic exists in only one direction.
  • the cross-link interference is reduced without requiring any dynamic inter-node signaling.
  • Figure 1 illustrates dynamic TDD performance benefit in R compared to traditional fixed TDD operation in LTE.
  • Reference 2 corresponds to Application number 62/444,271, entitled “ Coordination of duplex directions in R TDD system", filed on 01/03/2017, by Du Ho Kang, Jung-Fu Cheng, Havish Koorapaty, Sorour Falahati.
  • Reference 3 corresponds to Application number 62/458,349, entitled “system and method for distributed coordination of duplex directions in a NR system", filed on 02/13/2017, by Du Ho Kang, Jung-Fu Cheng, Sorour Falahati and Havish Koorapaty.
  • the condition to switch based on the buffer status may end up to be too conservative in some scenarios. For example, a node could switch to the static TDD pattern to minimize the crosslink interference if the bi-direction traffic exists, but the nodes are far apart from each other, due to the distributions of the APs and UEs so that they will not interfere with each other. This results in unnecessary throughput reduction.
  • determining the interference measurements may comprise receiving the interference measurements from a User Equipment, which made the interference measurements, or optionally, measuring interferences at the network node or combining the interference measurements received from the UE and the interferences measured by the network node.
  • User interface equipment QQ82 may include, for example, a speaker, a display, vibration generating circuitry, a USB port, a headphone interface, or other output elements. Using one or more input and output interfaces of user interface equipment QQ82, network node QQ60 may communicate with end users and/or the wireless network and allow them to benefit from the functionality described herein. For example, user interface equipment QQ82 may be used when installing, configuring, troubleshooting, repairing, or otherwise working on network node QQ60.
  • processing circuitry QQ360 executes software QQ395 to instantiate the hypervisor or virtualization layer QQ350, which may sometimes be referred to as a virtual machine monitor (VMM).
  • Virtualization layer QQ350 may present a virtual operating platform that appears like networking hardware to virtual machine QQ340.
  • Program code stored in memory includes program instructions for executing one or more telecommunications and/or data communications protocols as well as instructions for carrying out one or more of the techniques described herein, in several embodiments.
  • the processing circuitry may be used to cause the respective functional unit to perform corresponding functions according one or more embodiments of the present disclosure.
  • the term unit may have conventional meaning in the field of electronics, electrical devices and/or electronic devices and may include, for example, electrical and/or electronic circuitry, devices, modules, processors, memories, logic solid state and/or discrete devices, computer programs or instructions for carrying out respective tasks, procedures, computations, outputs, and/or displaying functions, and so on, as such as those that are described herein.

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

Abstract

L'invention concerne un procédé dans un nœud de réseau permettant de réduire une interférence de liaison transversale dans un réseau de communication. Le procédé consiste : à déterminer des mesures de signal au niveau du nœud de réseau ; à comparer les mesures déterminées avec un seuil ; et à déterminer une attribution de ressources pour une ou plusieurs directions de transmission, sur la base de la comparaison. L'invention concerne également un nœud de réseau destiné à mettre en œuvre ce procédé.
PCT/IB2018/053362 2017-05-15 2018-05-14 Procédé et nœud permettant de réduire une interférence de liaison transversale dans un réseau de communication Ceased WO2018211407A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762506526P 2017-05-15 2017-05-15
US62/506,526 2017-05-15

Publications (1)

Publication Number Publication Date
WO2018211407A1 true WO2018211407A1 (fr) 2018-11-22

Family

ID=62530273

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2018/053362 Ceased WO2018211407A1 (fr) 2017-05-15 2018-05-14 Procédé et nœud permettant de réduire une interférence de liaison transversale dans un réseau de communication

Country Status (1)

Country Link
WO (1) WO2018211407A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021217648A1 (fr) * 2020-04-30 2021-11-04 Qualcomm Incorporated Mesures d'interférence de liaison croisée (cli) pour des ressources de cli

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013100581A1 (fr) * 2011-12-28 2013-07-04 Samsung Electronics Co., Ltd. Procédé de changement de configuration de liaison montante et de liaison descendante tdd
WO2015066663A1 (fr) * 2013-11-04 2015-05-07 Texas Instruments Incorporated Procédé et appareil pour la configuration, la mesure et le rapport d'informations d'état de canal pour un duplexage à répartition dans le temps (tdd) d'évolution à long terme (lte) avec une configuration de liaison montante (ul)/liaison descendante (dl) dynamique
EP3010268A1 (fr) * 2013-06-14 2016-04-20 Ntt Docomo, Inc. Station de base sans fil, système de communication sans fil et procédé de communication sans fil

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013100581A1 (fr) * 2011-12-28 2013-07-04 Samsung Electronics Co., Ltd. Procédé de changement de configuration de liaison montante et de liaison descendante tdd
EP3010268A1 (fr) * 2013-06-14 2016-04-20 Ntt Docomo, Inc. Station de base sans fil, système de communication sans fil et procédé de communication sans fil
WO2015066663A1 (fr) * 2013-11-04 2015-05-07 Texas Instruments Incorporated Procédé et appareil pour la configuration, la mesure et le rapport d'informations d'état de canal pour un duplexage à répartition dans le temps (tdd) d'évolution à long terme (lte) avec une configuration de liaison montante (ul)/liaison descendante (dl) dynamique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021217648A1 (fr) * 2020-04-30 2021-11-04 Qualcomm Incorporated Mesures d'interférence de liaison croisée (cli) pour des ressources de cli

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