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Resource allocation in radio communication network

A wireless network and resource technology, applied in wireless communication, duplex signal operation, electrical components, etc., can solve problems such as dynamic TDD restrictions

Active Publication Date: 2015-09-23
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the benefits gained by dynamic TDD may be offset or limited by inter-cell interference

Method used

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  • Resource allocation in radio communication network
  • Resource allocation in radio communication network
  • Resource allocation in radio communication network

Examples

Experimental program
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Effect test

example 1

[0159] Example 1: Selection based on load in a radio cell

[0160] In this example, based on cell loading (eg, number of users for scheduling, resource usage such as PRB allocation, transmission power level in UL and / or DL, etc.), it is determined whether to use a certain resource allocation scheme.

[0161]In low load situations (eg, 10-20% resource usage in a cell, low transmit power, etc.), UE-to-UE and eNB-to-eNB interference is generally low. In this low load scenario, reducing UE-to-UE and eNB-to-eNB interference is not particularly important. Therefore, in this scenario, greater performance gains can be achieved by using time domain and / or frequency domain diversity without applying the time domain and / or frequency domain schemes disclosed in Sections 1.1 and 2.1. In this case, interference reduction according to the time domain and / or frequency domain of these parts can be disabled to allow the radio network node (e.g. its scheduler) more flexibility to use UE selecti...

example 2

[0162] Example 2: Scheme selection based on wireless channel characteristics

[0163] In this example, it may be determined whether to use a certain resource allocation scheme (eg, disclosed in Sections 1.1-3.1) based on radio channel characteristics of the radio environment in which the serving radio network node and the UE operate. More specifically, the scheme selection can be performed based on the frequency selection level of the wireless channel. In a non-frequency selective wireless channel, the channel bandwidth (eg, subband bandwidth) of the assigned bandwidth is larger than the coherent bandwidth of the wireless channel. Above the coherence bandwidth, the channel characteristics do not change. According to this example, in a very frequency-selective wireless environment, there will be large difference in wireless quality. Therefore, when the frequency selectivity of the channel is very high (e.g. not within the acceptable level predefined by the threshold), the fr...

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Abstract

The present disclosure introduces allocation of resources to one or more UEs based on a determined allocation priority and / or allocation probability in, e.g., Time Division Duplex (TDD) based radio communication networks. The disclosed technology provides the ability for a subframe to be configured as a "flexible" subframe, which can be dynamically allocated as either a downlink subframe or an uplink subframe. For each "flexible" subframe, an allocation priority and / or allocation probability is determined and subsequent resource allocation to user equipments (UEs) can be based on the determined allocation priority and / or allocation probability. Hereby, it is made possible to reduce interference in, e.g., TDD based radio communication networks.

Description

technical field [0001] The techniques presented in this disclosure relate generally to wireless communication networks, and in particular, without limitation, to wireless communication networks using Time Division Duplex (TDD), such as Long Term Evolution (LTE) TDD. More specifically, the present disclosure relates to resource allocation based on allocation priorities and / or allocation probabilities. Background technique [0002] This section is intended to provide a background to various embodiments of the technology described in this disclosure. This part of the description may include concepts that can be implemented, but not necessarily have been conceived or implemented in advance. Therefore, unless otherwise indicated herein, what is described in this section is not prior art to the description and / or claims in the present disclosure and is not admitted to be prior art by virtue of its mere inclusion in this section. [0003] In a typical cellular radio system, a use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04
CPCH04W72/06H04W72/0446H04W72/563H04W72/56H04L5/14H04W72/12H04W88/02
Inventor 刘进华穆罕默德·卡兹米张战
Owner TELEFON AB LM ERICSSON (PUBL)