Network-wide inter-cell interference minimization via coordinated multipoint cell scheduling coordination

A technology for inter-cell interference minimization, applied in diversity/multi-antenna systems, allocation between users/terminals, signaling allocation, etc., can solve problems such as infeasibility

Inactive Publication Date: 2012-05-16
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this is not feasible in practice, especially for large networks

Method used

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  • Network-wide inter-cell interference minimization via coordinated multipoint cell scheduling coordination
  • Network-wide inter-cell interference minimization via coordinated multipoint cell scheduling coordination
  • Network-wide inter-cell interference minimization via coordinated multipoint cell scheduling coordination

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Experimental program
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Embodiment Construction

[0015] FIG. 2 shows two larger views of the network 10 . The network 10 is divided into a plurality of CoMP cells, each cell comprising a plurality of sub-cells (not shown). CoMP cells are grouped into sets, shown by the colors red (R), blue (B) and yellow (Y) CoMP cells. CoMP cell set groups are geographically dispersed, similar to traditional cellular network frequency reuse patterns, to geographically separate all CoMP cells per set or color. Due to this separation, transmissions to UEs in each set or color of CoMP cells can be scheduled independently since they do not cause interference to each other.

[0016] Starting from a set of red CoMP cells such as those in Figure 2, under the assumption that border subcells in adjacent blue and yellow CoMP cells do not cause interference, transmissions to UEs in red CoMP cells are scheduled to minimize the inter-subcell interference. Subsequently, if figure 1 As indicated by the outward arrows in , the red CoMP cell controller ...

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Abstract

Network-wide inter-cell interference is reduced by aggregating cells (herein, sub-cells) into Coordinated Multipoint (CoMP) cells, each having a controller. The CoMP cells are divided into sets, similar to a frequency reuse plan. Scheduling information regarding transmissions, scheduled to and from UEs in one set of CoMP cells is transmitted to controllers in sets of neighboring CoMP cells, in advance of the transmissions. Controllers in the receiving sets of CoMP cells schedule transmission to minimize both inter-sub-cell interference and interference with the set of CoMP cells that transmitted the scheduling information, and assuming no interference from other CoMP cells. They then transmit scheduling information to subsequent set(s) of CoMP cells.; The order of scheduling information transmission between sets of CoMP cells may be rotated for fairness The scheduling information may range from bare threshold data indicating at least one transmission, to detailed information such as estimated path gains to each UE.

Description

technical field [0001] The present invention relates generally to wireless cellular communications, and more particularly to systems and methods for mitigating inter-cell interference by exchanging scheduling information in advance between coordinated multipoint cells. Background technique [0002] Wireless cellular communication networks are nearly ubiquitous and provide mobile voice and data communications to millions of subscribers. In a cellular network, fixed transceivers (base stations, Node Bs, etc.) provide two-way radio communication with multiple subscribers within a geographic area or cell (the term sector is used synonymously with cell when used herein). Methods of suppressing radio interference within a cell, such as time division, frequency division and code division multiplexing and combinations thereof, are known in the art. Additionally, methods of suppressing inter-cell interference, such as frequency reuse patterns, are known in the art. In modern wirele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/02H04W72/12
CPCH04W72/1278H04W72/1231H04L5/0041H04L5/0053H04W72/54H04W72/20
Inventor 桂建卿C·霍伊曼
Owner TELEFON AB LM ERICSSON (PUBL)
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