Method for inter-cell interference coordination for OFDM mobile communication system

A technology for mobile communication systems and inter-cell interference, which is applied in the direction of data exchange, transmission system, and wireless communication through path configuration. It can solve problems such as poor service quality and low data rate, and achieve increased service throughput and effective wireless resources. , the effect of improving user service quality

Active Publication Date: 2009-06-03
NOKIA TECH OY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, similar to CDMA, the "reuse" of the fundamental frequency in OFDM network configurations has the potential to lead to relatively poor quality of service and potentially lower data rates at the cell edge, depending on the traffic load of surrounding cells

Method used

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  • Method for inter-cell interference coordination for OFDM mobile communication system
  • Method for inter-cell interference coordination for OFDM mobile communication system
  • Method for inter-cell interference coordination for OFDM mobile communication system

Examples

Experimental program
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Embodiment Construction

[0019] figure 1 An exemplary allocation scheme for allocating carriers S1 to SN to user channels A, B, C and D in an OFDM time-frequency grid (T-F) is shown.

[0020] OFDM offers the possibility to flexibly assign one or more carriers S1 to SN to one logical channel A, B, C or D to control the data rate of the user channel. In a TDMA system, since this point may change over time (for example, the period of change is K symbol period Ts, such as 2ms), therefore, as figure 1 As shown, we propose a two-dimensional resource allocation grid, referred to as T-F grid in the following.

[0021] For data transmission, some time-frequency grid positions are not available because these time-frequency grid positions are used to carry pilot or signaling information. User allocation for the remaining locations can be done based on frequency or time or a combination of both.

[0022] figure 2 Shows a block diagram of a mobile communication system in which, at least in the downlink, a m...

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Abstract

A method for inter-cell interference coordination with power planning in a radio communication system employing multi-carrier techniques such as OFDM for the air interface communication between a network (N) and a plurality of user terminals (T1 to Tn), the network (N) comprising a plurality of base stations (NE1 to NE7) having means for communication with the user terminals (T1 to Tn) located inside their cell service area (C1 to C7), the cells arranged following an adjacent cell pattern, where neighbor cells do not have the same number and cells with the same number are separated by at least one cell in-between, for resource planning purposes, each cell having an inner cell region (IC) and a border cell region (OC) in which inter-cell interference is affecting the quality of service received by a user terminal (T). <IMAGE>

Description

technical field [0001] The present invention relates to wireless communication systems, and more particularly to methods for minimizing inter-cell interference in digital wireless cellular communication systems using multi-carrier transmission techniques such as Orthogonal Frequency Division Multiplexing (OFDM). Background technique [0002] Communication systems using multiple carriers, such as those using OFDM technology, are commonly used for the transmission of high-speed digital wireless signals and television signals, such as the Digital Audio Broadcasting (DAB) system and Digital Video Broadcasting Terrestrial Transmission Mode (DVB-T) system. Furthermore, OFDM has become a widely accepted standard high-bit-rate transmission technique for implementing broadband air interfaces for wireless access to existing local area networks (LANs) such as HiperLAN and IEEE WLAN systems. Also, the 3rd Generation Partnership Project (3GPP) for standardizing a high-speed broadband wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/02H04L1/00H04L27/26H04J11/00H04B7/005H04B7/02H04L12/28H04W52/34H04W52/40
CPCH04W52/40H04B7/022H04W52/343
Inventor 克里斯蒂安·格奥尔格·格拉赫
Owner NOKIA TECH OY
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