A prach access control method, access method and device

An access control and access number technology, applied in the field of mobile communication, can solve problems such as the increase of PRACH access conflicts, and achieve the effect of increasing the number of accesses and reducing the probability of collision

Active Publication Date: 2021-03-30
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a PRACH access control method, access method and device, which are used to solve the problem that the current PRACH access mechanism easily causes increased PRACH access conflicts when the base station is responsible for large terminal data

Method used

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  • A prach access control method, access method and device
  • A prach access control method, access method and device
  • A prach access control method, access method and device

Examples

Experimental program
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Embodiment 1

[0021] This embodiment provides a PRACH access control method, which can be implemented by a base station or a device set on the base station, figure 2 is a flowchart of the PRACH access control method, such as figure 2 As shown, the method includes the following steps:

[0022] Step 101: receiving multiple physical random access PRACH preamble sequence numbers sent by the terminal through each subframe of the virtual access frame;

[0023] Before receiving multiple physical random access PRACH preamble numbers sent by the terminal through each subframe of the virtual frame, the PRACH resource of the base station is broadcast to the terminal. The PRACH resource includes the number of subframes included in the virtual access frame, and defines In order to use a virtual access frame as the unit for each initiation of PRACH access, that is, each time the terminal initiates PRACH access to the base station, it must transmit a different PRACH preamble sequence number on each sub...

Embodiment 2

[0038] In this embodiment, taking the existing 64 preambles of the FDD LTE system as an example, the PRACH access method provided by the present invention is described in detail.

[0039] The base station broadcasts the PRACH resource of the base station in SIB2, wherein SIB2 newly adds a description of parameter N, and adds a parameter N in PRACH-ConfigInfo, which is used to describe the number of subframes included in the virtual access frame. At the same time, for the original description of the PRACH resource as a unit of a subframe, it is all modified to use a virtual frame as a basic unit.

[0040] The UE receives the system message and obtains the PRACH configuration of the base station.

[0041] According to the obtained configuration, the UE randomly transmits the preamble sequence number on the virtual frame, that is, transmits the preamble sequence number on each subframe of the virtual frame. In particular, the method of transmitting the preamble on the subframe c...

Embodiment 3

[0054] This embodiment provides a PRACH access control device, the device is located at the base station side, and the device is used to implement the PRACH access control method provided in the above-mentioned embodiment 1 and embodiment 2, Figure 4 is the block diagram of the device, such as Figure 4 As shown, the device 40 includes the following components:

[0055] The first receiving module 41 is configured to receive a plurality of physical random access PRACH preamble sequence numbers sent by the terminal through each subframe of the virtual access frame;

[0056] The determining module 42 is used to obtain the PRACH access number of the terminal according to the mapping relationship between the PRACH preamble sequence number and the PRACH access sequence number agreed with the terminal in advance;

[0057] A sending module 43, configured to send the obtained PRACH access number to the terminal.

[0058] Further, the above device may further include: a broadcast mod...

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Abstract

The present invention provides a PRACH access control method, access method and device, which are used to solve the problem that the current PRACH access mechanism is likely to cause increased PRACH access conflicts when the base station is responsible for large terminal data. The method includes: receiving the terminal Multiple physical random access PRACH preamble numbers sent through each subframe of the virtual access frame; obtain the PRACH access number of the terminal according to the mapping relationship between the PRACH preamble number and the PRACH access sequence number pre-agreed with the terminal; The obtained PRACH access number is sent to the terminal. This solution reduces the collision probability of the terminal performing PRACH access and increases the number of allowed terminal access.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a PRACH access control method, access method and device. Background technique [0002] With the development of the LTE (Long Term Evolution, long-term evolution) system, the use of MTC (Machine Type Communication, machine type communication) gradually increases. Therefore, it can be foreseen that the number of UEs in charge of a base station will continue to increase in the future. The current LTE PRACH (Physical Random Access Channel) access mechanism is that the UE sends the PRACH preamble on the PRACH resource. The time-frequency resource is: the time occupied by the time domain is one subframe, and the bandwidth occupied by the frequency domain is 6 RBs, such as figure 1 shown. It can be seen that the number of PRACH access sequence numbers provided by the existing PRACH access method is limited. With the massive increase of terminal data that the base station is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08
CPCH04W74/085H04W74/0866H04W48/10H04W74/08H04L5/0053H04W74/008H04W74/0841
Inventor 侯晓辉杨锋姚幸林李严梅王延鹏
Owner ZTE CORP
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