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Cell change in wireless communication system

A technology of wireless communication system and cell, applied in the direction of wireless communication, access restriction, electrical components, etc., can solve problems such as difficulty in ensuring device changes

Active Publication Date: 2019-05-21
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, challenges arise in the context of other systems and NB-IoT with widely varying channel conditions that make it difficult to ensure that devices change to the most suitable cell available

Method used

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  • Cell change in wireless communication system
  • Cell change in wireless communication system
  • Cell change in wireless communication system

Examples

Experimental program
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Embodiment Construction

[0035] figure 1 A wireless communication system 10 (eg, a Narrow Band Internet of Things NB-IoT system) is illustrated in accordance with some embodiments. As shown, system 10 includes a core network (CN) 12 and a radio access network (RAN) 14 . CN 12 connects one or more wireless communication devices 16 (or simply "wireless devices") via RAN 14 to one or more external networks. The one or more external networks may include, for example, the Public Switched Telephone Network (PSTN) and Packet Data Networks (PDN) such as the Internet.

[0036] The RAN 14 includes one or more radio network nodes 18 (eg, base stations), one of which is shown. Each radio network node 18 transmits and / or receives radio signals 20 in order to provide radio coverage for the wireless communication device(s) 16 . Through this radio coverage, each radio network node 18 provides for radio access to one or more cells 22 of the CN 12, two of which are shown as cells 22A and 22B.

[0037]A wireless dev...

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PUM

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Abstract

A method is performed in a wireless communication system (10). The method may comprise ranking a first cell (22A) and a second cell (22B) of the wireless communication system (10) according to one ormore defined cell-ranking criteria. The method may also comprise evaluating that the second cell (22B) has met a reselection criterion for a wireless device (16), provided that the second cell (22B) is ranked better than the first cell (22A) by at least a margin. The value of the margin may depend on a coverage level of the wireless device (16) with respect to the first cell (22A) and a coverage level of the wireless device (16) with respect to the second cell (22B).

Description

[0001] related application [0002] This application claims priority to US Provisional Application Serial No. 62 / 406,788, filed October 11, 2016, the entire contents of which are incorporated herein by reference. technical field [0003] This application relates generally to wireless communication systems, and more particularly to cell change in such systems. Background technique [0004] Machine-to-machine (M2M) communication is used to establish communication between machines and between machines and humans. Communication may involve the exchange of data, signaling, measurement data, configuration information, and the like. The size of the device can vary from the size of a wallet to the size of a base station. M2M devices are very often used for applications such as sensing environmental conditions (eg, temperature readings), metering or measuring (eg, electricity usage, etc.), fault finding or error detection. In these applications, the M2M device is rarely active, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/30H04W48/20
CPCH04W48/20H04W36/00837H04W36/302H04W36/087H04W36/0085
Inventor M.卡兹米S.桑加拉萨
Owner TELEFON AB LM ERICSSON (PUBL)