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Random access procedure

A random access and network access technology, applied in the direction of synchronization devices, transmission systems, wireless communications, etc., can solve problems such as roughness, increased network/UE resources, and inaccurate decisions

Pending Publication Date: 2021-09-10
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even under normal coverage operation, absolute RSRP measurement accuracy is defined as ±7dB (i.e., the measured RSRP is accurate within ±7dB), which is rather rough
Using such measurements for random access procedures may lead to inaccurate decisions, which may result in increased network / UE resources

Method used

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Embodiment Construction

[0174] Some embodiments contemplated herein will now be described more fully with reference to the accompanying drawings. However, other embodiments are within the scope of the subject matter disclosed herein, and the disclosed subject matter should not be construed as limited to only the embodiments set forth herein; rather, these embodiments are provided by way of example to inform the art The skilled person conveys the scope of the subject matter.

[0175] figure 1 A portion of a cellular communication network 100 is shown in which the methods disclosed herein may be implemented.

[0176] specifically, figure 1 A wireless device 102 is shown having a wireless connection to a base station 104 of a radio access network in the cellular communication network 100 . The cellular communication network 100 also includes a core network 106 .

[0177] In the following description, the generic term "network node" is used, which may correspond to any type of radio network node or a...

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Abstract

When a wireless device obtains a request for a random access in a cell, based on information relating to at least one type of reference signal, it selects at least one type of reference signal. The wireless device then performs a measurement in said cell using the selected type or types of reference signal. Based on a result of the measurement, the wireless device selects a coverage enhancement level, and it then sends a random access message to the cell using radio resources associated with the selected coverage enhancement level.

Description

technical field [0001] The present disclosure relates to a method performed by a wireless device for performing random access. Background technique [0002] Areas of interest in 3GPP involve technologies covering machine-to-machine (M2M) and / or Internet of Things (IoT) related use cases. 3GPP Release 13 and Release 14 include enhancements to support Machine Type Communication (MTC) with new User Equipment (UE) categories (i.e., Cat-M1, Cat-M2), thereby supporting 6 Physical Resource Blocks (PRBs) (or for Reduced bandwidth of Cat-M2 up to 24 PRBs) and Narrowband IoT (NB-IoT) UEs (and UE categories Cat-NB1 and Cat-NB2) providing a new radio interface. [0003] In this paper, we refer to the LTE enhancements introduced for MTC in 3GPP Release 13, Release 14, and Release 15 as "eMTC", including (but not limited to) support for bandwidth-constrained UEs (Cat-M1), and Support for overlay enhancements. This is to separate this discussion from NB-IoT (the notation here is for any...

Claims

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Application Information

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IPC IPC(8): H04W74/08H04W56/00H04L5/00
CPCH04W74/0833H04W56/001H04L5/0007H04L5/0041H04L5/0053H04L5/006H04L5/0048H04B17/318H04L5/0051H04W74/0841H04W74/0866
Inventor 里特诗·施里瓦斯蒂夫马格努斯·阿斯特罗姆穆罕默德·卡兹米桑山·山加拉沙
Owner TELEFON AB LM ERICSSON (PUBL)
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