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Intra-Cell Interference Mitigation in Wireless Networks Using Relay Nodes

A relay node, wireless communication network technology, applied in the field of downlink transmission, can solve the problem of no wireless communication network output power mechanism, etc., achieve effective radio resource use, low transmission collision probability, and reduce inter-cell interference. Effect

Inactive Publication Date: 2017-11-21
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Specifically, there is no mechanism for controlling the output power in a wireless communication network when beams from one or more macro BSs are directed towards relay nodes in neighboring cells, causing high interference in a certain cell area

Method used

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  • Intra-Cell Interference Mitigation in Wireless Networks Using Relay Nodes
  • Intra-Cell Interference Mitigation in Wireless Networks Using Relay Nodes
  • Intra-Cell Interference Mitigation in Wireless Networks Using Relay Nodes

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Experimental program
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Embodiment Construction

[0025] In mobile communication networks (or cellular systems) such as 3GPP LTE-Advanced, relay nodes (RNs) receive measurement reports of user equipments (UEs) connected to them, ie, served by the RNs. Typically, these measurement reports include measured RSRP (Reference Signal Received Power) or RSRQ (Reference Signal Received Quality) or both. Based on these measurement reports, RN can measure DL total interference. Additionally, measurements of E-UTRA Received Signal Strength Indicator (RSSI) may be used. This RSSI measurement includes signals from the desired reference signal and interfering I DL (downlink in-band interference) received signal strength of both. Therefore, from the measured RSSI, the total DL interference I can be easily extracted DL . In the 3GPP technical specification TS 36.214, it is described that UEs can measure RSSI in order to perform measurements related to reference signal received quality (RSRQ), because:

[0026]

[0027] where N is the ...

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Abstract

The present disclosure relates to a method in a relay node and the RN (6, 100) itself in a wireless communication network for controlling downlink transmissions to user equipment (UE) served by a relay node (RN). The RN (6, 100) includes a transceiver circuit (110), a receiver circuit (120) and a processing and control circuit (130). The transceiver circuit (110) is configured to request each said UE to measure and report Reference Signal Received Power (RSRP) and UE total downlink interference. A receiver circuit (120) is configured to receive and forward the reported RSRP and UE total downlink interference for each of the UEs. processing and control circuitry (130) configured to measure RN total downlink interference; determine which UEs are located close to the RN based on the reported RSRP for each of said UEs; create a list of UEs that are located close to the RN and experience the level of UE total downlink interference is similar to the measured RN total downlink interference for the UE; determine whether the measured RN total downlink interference exceeds the RN interference threshold; and when this is the case, control to the created UE list Downlink transmission of the UE in .

Description

technical field [0001] The present disclosure relates to methods in a relay node and the relay node itself in a wireless communication network. In particular, it relates to controlling downlink transmissions to user equipment located close to a relay node in a wireless communication network. Background technique [0002] The latest versions of wireless communication systems / networks (cellular systems) are currently being standardized and one of their main goals, in addition to increased peak data rates and system throughput, is to provide increased data rates for user equipment at the cell edge. One way to achieve these high data rates at cell edges or cell boundaries is to deploy relay nodes. Relay nodes are widely used in wireless communication networks / systems such as the next phase of 3GPP Long Term Evolution (LTE), also referred to as "LTE Advanced". [0003] With a large number of relay nodes in the wireless communication network, the situation with regard to interfe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04W88/04H04W72/541
CPCH04W24/10H04W84/047H04B7/15528H04W72/541H04B7/15564
Inventor K.迪摩K.希尔图宁
Owner TELEFON AB LM ERICSSON (PUBL)