Method and corresponding device for random access

A technology of random access and random access signal, applied in digital transmission systems, error prevention, network traffic/resource management, etc., can solve the problems of inability to support services with higher delay requirements, large control signaling, overhead, etc.

Pending Publication Date: 2018-04-06
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The existing random access method includes four-step interaction to complete the functions of uplink synchronization and uplink transmission authorization, which will be limited in the face of new 5G services and new requirements. For example, in the mMTC scenario, many users only need to burst It only needs to send...

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  • Method and corresponding device for random access
  • Method and corresponding device for random access
  • Method and corresponding device for random access

Examples

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Embodiment 1

[0098]In this embodiment, the random access method provided by the invention will be introduced through the specific design of payload data. In this implementation, the user equipment has a certain preset amount of service data to be sent, and all the data cannot be completely transmitted through one transmission. It is hoped that the normal random access process can be completed and the data can be continuously sent through the obtained uplink transmission authorization. At this time, the payload data mainly includes RRC connection request, cache status report, and user unique identification information. When the user reads the system message (for example, reads the MIB or SIB message from the downlink broadcast channel PBCH) and obtains the random access configuration information set by the network, such as the time-frequency resource position of random access, the configuration information of the preamble sequence, etc. . Through the analysis of the existing technology, it...

Embodiment 2

[0123] In this embodiment, the random access method provided by the invention will be introduced through the specific design of payload data. In this implementation, the user has a small amount of business data to send, and all the data can be completely transmitted through one transmission, without completing the random access process, only a small amount of data needs to be sent to the receiving end correctly, such as in MTC (Machine typecommunication, machine type communication) in the meter reading business, etc., only need to send a small amount of meter reading information to the receiving end. At this time, the payload data mainly includes user unique identification information and business data. When the user equipment reads the system message (for example, reads the MIB or SIB message from the downlink broadcast channel PBCH), it obtains the random access configuration information set by the network, such as the time-frequency resource position of random access, and t...

Embodiment 3

[0146] In the first and second embodiments above, the random access method of the present invention is introduced based on the RRC connection requirement and the single transmission service respectively, especially in different cases, the composition of the payload data and the corresponding Handling of feedback information. In the third embodiment, the random access method provided by the invention will be introduced through the scenario of a beamforming system (beamforming system) in 5G. In this implementation, the network side uses the beam polling mechanism for SS (Synchronizing Signal, synchronization signal), such as primary synchronization signal and secondary synchronization signal, that is, assuming that the network side can provide beams in N directions, the synchronization signal will be Emit once in each direction, such as Figure 9 As shown, by receiving the synchronization signal, the user can not only achieve the purpose of downlink synchronization, but also fi...

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Abstract

The invention relates to the technical field of wireless communication, and specifically, relates to a method for random access. The method comprises the following steps: user equipment sends a randomaccess signal comprising a leader sequence and payload data, wherein the leader sequence is set randomly or set according to the number of the leader sequences needed to be sent, and the payload datais set according to current service requirements; the user equipment receives a feedback information which is returned by a base station and corresponding to the random access signal, wherein the feedback information at least comprises one of user unique identifier information, timing advance information, uplink transmission authorization information and an acknowledgement ACK signal/unacknowledged NACK signal. Namely, by design of the random access signal which comprises the leader sequence and the payload data, the scheme can realize functions which can be completed by four interactions ina conventional mode just by two interactions, can be adaptive to new requirements in 5G, and for single data transmission, the scheme can reduce access time delay.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular, the present application relates to a random access method and corresponding equipment. Background technique [0002] With the rapid development of the information industry, especially the growing demand from the mobile Internet and IOT (Internet Of Things, Internet of Things), unprecedented challenges are brought to future mobile communication technologies. For example, according to the report ITU-R M.[IMT.BEYOND 2020.TRAFFIC] of the International Telecommunication Union ITU, it can be predicted that by 2020, the growth of mobile traffic will increase by nearly 1,000 times compared to 2010 (4G era), and the number of user equipment connections will also increase. It will exceed 17 billion. As massive IoT devices gradually penetrate into mobile communication networks, the number of connected devices will become even more astonishing. In response to this...

Claims

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Application Information

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IPC IPC(8): H04W74/08H04L1/16
CPCH04L1/16H04L1/1607H04W74/0833H04W28/02H04W28/0278H04W74/002H04W72/04
Inventor 熊琦喻斌钱辰付景兴王轶张英杰
Owner BEIJING SAMSUNG TELECOM R&D CENT
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