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A non-contention random access method, node device and system

A random access and random access message technology, applied in the field of communication, can solve problems such as inability to guarantee, achieve the effect of reducing access delay and improving random access performance

Active Publication Date: 2019-09-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For MTC UEs that need coverage enhancement, even if PRACH Preamble is sent at full power, it cannot guarantee access to the system. Therefore, for non-contention random access procedures, it is impossible to increase the power of MTC UEs with enhanced coverage. , so it is necessary to propose a random access scheme based on coverage-enhanced MTC UEs for this scenario to ensure that coverage-enhanced MTC UEs can normally access the system

Method used

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  • A non-contention random access method, node device and system
  • A non-contention random access method, node device and system
  • A non-contention random access method, node device and system

Examples

Experimental program
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Embodiment 1

[0192] There are multiple MTC UEs in the LTE / LTE-A system, and the multiple MTC UEs are divided into normal MTC UEs (Normal MTC UEs) and coverage-enhanced MTC UEs (Coverage Improvement MTC UEs). The coverage-enhanced MTC UEs may It is referred to as CI MTC UE for short. Three coverage enhancement levels (CIL, Coverage ImprovementLevel) are configured in the system, namely CIL0, CIL1 and CIL2. Table 1 is a schematic diagram of coverage enhancement level configuration; as shown in Table 1, the value intervals of the coverage enhancement targets (CIT, Coverage Improvement Target) corresponding to each CIL are equal in size, and the value range in this embodiment is between 0dB and 15dB , the value range is 5dB.

[0193] CIL Coverage Improvement Target (CIT)

[0194] 0 0dB

1 5dB

2 10dB

[0195] Table 1

[0196] In this embodiment, the number of repetitions of the random access sequence (PRACH Preambl...

Embodiment 2

[0204] There are multiple MTC UEs in the LTE / LTE-A system, and the multiple MTC UEs are divided into normal MTC UEs (Normal MTC UEs) and coverage-enhanced MTC UEs (Coverage ImprovementMTC UEs). The coverage-enhanced MTC UEs can be referred to as For CI MTC UE. Three coverage enhancement levels (CIL, Coverage ImprovementLevel) are configured in the system, namely CIL0, CIL1 and CIL2. Table 2 is a schematic diagram of coverage enhancement level configuration; as shown in Table 2, the value intervals of the coverage enhancement targets (CIT, Coverage Improvement Target) corresponding to each CIL are equal in size, and the value range in this embodiment is between 0dB and 15dB , the value range is 5dB.

[0205] CIL Coverage Improvement Target (CIT) 0 0dB

1 5dB

2 10dB

[0206] Table 2

[0207] In this embodiment, the number of repetitions of the random access sequence (PRACH Preamble) corresponding to CIL0 is 4...

Embodiment 3

[0221] There are multiple MTC UEs in the LTE / LTE-A system, and the multiple MTC UEs are divided into normal MTC UEs (Normal MTC UEs) and coverage-enhanced MTC UEs (Coverage Improvement MTC UEs). The coverage-enhanced MTC UEs may It is referred to as CI MTC UE for short. Three random access sequence (PRACH Preamble) repetition levels are configured in the system, which are PRACH Preamble repetition level 0, PRACH Preamble repetition level 1, and PRACH Preamble repetition level 2. Table 3 is a schematic diagram of coverage enhancement level configuration; as shown in Table 3, the coverage enhancement target (CIT, Coverage Improvement Target) value intervals corresponding to each PRACH Preamble repetition level are equal in size, and the value range in this embodiment is from 0dB to 15dB, the value interval is 5dB.

[0222]

[0223] table 3

[0224] In this embodiment, the number of repetitions of PRACH Preamble corresponding to PRACH Preamble repetition level 0 is 4 times, ...

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Abstract

Examples of the present invention disclose a non -competitive random access method, node equipment and systems; of which, the non -competitive random access method includes: the first node sends a non -competitive random access configuration to the second node through the downward channel.Information; the second node obtains the configuration information of non -competitive random access, and sends random access messages on the random access channel based on the configuration information.

Description

technical field [0001] The present invention relates to communication technology, in particular to a non-contention random access method, node equipment and system. Background technique [0002] Machine Type Communication (MTC, Machine Type Communication) User Equipment (UE, User Equipment), referred to as MTC UE, also known as Machine to Machine (M2M, Machine to Machine) user communication equipment, is the main application form of the Internet of Things at this stage. Low power consumption and low cost are important guarantees for its large-scale application. Currently, M2M devices deployed in the market are mainly based on the Global System of Mobile communication (GSM, Global System of Mobile communication) system. In recent years, due to the improvement of spectrum efficiency of Long Term Evolution (LTE, Long Term Evolution) and the subsequent evolution of LTE (LTE-A), more and more mobile operators choose LTE / LTE-A as the future broadband wireless communication system...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08
CPCH04W28/18H04W74/0833H04W74/0838H04W72/23H04W72/0446
Inventor 刘锟戴博鲁照华夏树强方惠英石靖李新彩
Owner ZTE CORP
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