Methods and nodes for random access

A technology of random access and random access response, applied in electrical components, wireless communication, network topology, etc., to achieve the effect of improving accuracy, network planning and/or coverage

Active Publication Date: 2014-04-09
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0095] The aim is therefore to solve the problem outlined above and to provide a solution for a reliable RA procedure, which is related to the shortcomings in current RA procedures, e.g. when applied to heterogeneous networks

Method used

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  • Methods and nodes for random access
  • Methods and nodes for random access
  • Methods and nodes for random access

Examples

Experimental program
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Effect test

Embodiment A

[0143] Embodiment A is particularly useful in scenarios where a victim cell such as a pico eNodeB or relay node receives high interference from an aggressor cell such as a macro eNodeB or aggressor UE on both DL and UL. However, embodiments are not limited to scenarios with both DL and UL ABS subframes.

[0144] according to Figure 8b In the first aspect of embodiment A shown in the first RACH 801, the legacy RACH is at a first time-frequency location, while the second RACH 804, the ABS RACH or alternatively the restricted mode RACH is configured at a second frequency- time position. The location of the second RACH 804 overlaps with UL low-interference frequency-time resources, such as UL ABSs associated with the aggressor UE in the aggressor cell. This results in low interference at the victim base station when it receives transmissions on the second RACH 804 .

[0145] The second RACH position is thus suitable for UEs located in the extended cell range segment. UEs loca...

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Abstract

The present invention relates to a method in a wireless device for performing a random access to a cell of a wireless network, and to corresponding methods in a radio network node and a positioning node, and the corresponding nodes. The method comprises receiving (11) information from a radio network node comprised in the wireless network, wherein the received information indicates a first and a second random access transmission configuration. The method also comprises selecting (12) one of the first and second random access transmission configurations, and transmitting (13) a random access preamble in accordance with the selected random access transmission configuration.

Description

technical field [0001] The present disclosure relates to random access and more particularly to methods for performing random access and / or supporting random access procedures, and also to wireless devices, and nodes of wireless networks. Background technique [0002] 3GPP Long Term Evolution (LTE) is the fourth generation of mobile communication technologies developed within the 3rd Generation Partnership Project (3GPP) to improve the Universal Mobile Telecommunications System (UMTS) standard in response to improved services such as Future requirements for higher data rates, increased efficiency and reduced costs. Universal Terrestrial Radio Access Network (UTRAN) is a radio access network of UMTS, and Evolved UTRAN (E-UTRAN) is a radio access network of LTE system. In UTRAN and E-UTRAN, User Equipment (UE) connects wirelessly to a Radio Base Station (RBS) commonly referred to as a Node B (NB) in UMTS and an Evolved Node B (eNodeB or eNodeB) in LTE. An RBS is a general te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/00
CPCH04W64/00H04W84/045H04W24/02H04W74/0833H04W74/002
Inventor B·林多夫I·西欧米纳M·卡兹米
Owner TELEFON AB LM ERICSSON (PUBL)
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