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Inter-node coordination for cross-link interference management

A cross-link and link technology, which is applied in the directions of multiple use of transmission paths, sub-channel allocation of transmission paths, and digital transmission systems, can solve problems such as infeasibility of dynamic exchange, problematic information availability, and unreliability, and achieve reduction Effect of Backhaul Signaling Overhead

Pending Publication Date: 2021-08-06
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, dynamic exchange of the intended DL / UL transmission configuration between network nodes via backhaul signaling is neither feasible nor reliable
[0061] Also, in situations where there is excessive information exchange between nodes (where there is no central decision-making process), the availability of information can be problematic

Method used

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  • Inter-node coordination for cross-link interference management
  • Inter-node coordination for cross-link interference management
  • Inter-node coordination for cross-link interference management

Examples

Experimental program
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Embodiment

[0119] Some of the embodiments herein will now be described more fully with reference to the accompanying drawings.

[0120] According to some embodiments, a solution is provided that includes classifying the time resources of a NN or set of NNs into two types: fixed time resources and flexible time resources. This fixed / flexible resource classification is then exchanged between different NNs or different sets of NNs by partially coordinated transmission for CLI mitigation.

[0121] A fixed time resource means that the time resource may change over time, but is not expected to change frequently. Fixed time resources include fixed UL resources available only for UL transmission / reception, fixed DL resources available only for DL ​​transmission / reception, and possibly reserved resources not used for communication. Fixed and flexible resource classification can be done at different granularities such as slot level or symbol level, and can be indicated via backhaul in different w...

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Abstract

Embodiments include exemplary methods for CLI mitigation. The methods comprise receiving (1310), from at least one sending network node, a TDD configuration of the at least one sending network node, the TDD configuration identifying at least one slot of the TDD configuration as either a fixed uplink slot or a fixed downlink slot, and at least one slot of the TDD configuration as a flexible slot for which at least one symbol has an undefined transmission direction and the remaining symbols of the slot, if any, have a defined transmission direction. The methods also comprise adapting (1320) operations in a cell based on the received TDD configuration for mitigating CLI with the at least one sending network node. Embodiments also include network nodes configured to perform the exemplary methods and / or procedures.

Description

technical field [0001] The present invention relates generally to wireless communication networks and, in particular, to cross-link interference (CLI) mitigation. Background technique [0002] Interference Protection in Time Division Duplex (TDD) Networks [0003] Wireless cellular networks are constructed of cells, each defined by a certain coverage area of ​​a network node (NN). The NN communicates wirelessly with user equipment (UE) in the network. Communication is carried out in paired or unpaired spectrum. In the case of paired spectrum, the downlink (DL) and uplink (UL) directions are separated in frequency, known as frequency division duplexing (FDD). In the case of unpaired spectrum, DL and UL use the same spectrum, known as TDD. As the name suggests, a guard period (GP) is usually used between DL and UL to separate DL and UL in the time domain. GPs serve several purposes. Most fundamentally, the processing circuits at the NN and UE need enough time to switch ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W92/20H04W72/12H04L5/00H04W72/04H04W72/54
CPCH04W72/0446H04W92/20H04L5/1469H04L5/0092H04L5/0023H04L5/1461H04L5/0048H04W72/27H04W72/541H04W72/535H04B17/345H04W72/542
Inventor 李静雅S·法克斯尔M·桑德伯格P·厄尔思博N·V·K·伊鲁库拉帕蒂F·巴拉克
Owner TELEFON AB LM ERICSSON (PUBL)
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