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A random access response rar transmission method and related equipment

A technology of random access response and transmission method, which is applied in the field of random access response RAR transmission method and related equipment, and can solve problems such as differences in understanding

Active Publication Date: 2019-11-08
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The embodiment of the present invention provides a random access response RAR transmission method and related equipment, which are used to solve the problem that the RAR windows of multiple PRACH opportunities overlap and different PRACH opportunities may correspond to the same RA-RNTI The problem of different understanding of RAR DCI

Method used

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  • A random access response rar transmission method and related equipment
  • A random access response rar transmission method and related equipment
  • A random access response rar transmission method and related equipment

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment

[0154] A RA-RNTI set corresponding to a PRACH repetition level is determined in a pre-defined or network semi-static configuration manner, and the set includes Ni RA-RNTIs.

[0155] The base station and the terminal agree on a certain PRACH opportunity as a starting point, and cyclically determine the RA-RNTI of each PRACH opportunity according to the arrangement order of each RA-RNTI in the set. Assuming that the initial PRACH opportunity corresponds to the first RA-RNTI in the set, then the RA-RNTI corresponding to the jth PRACH opportunity is the (jmod Ni)th RA-RNTI. Specifically, the first PRACH opportunity corresponds to the first RA-RNTI in the set, the second PRACH opportunity corresponds to the second RA-RNTI in the set, ..., the Nith PRACH opportunity corresponds to the Nith in the set RA-RNTI, the Ni+1th PRACH opportunity corresponds to the first RA-RNTI in the set, and so on.

[0156] In a specific example, the network configures the number of RA-RNTIs correspondin...

no. 2 Embodiment

[0162] An information field is added to the DCI for scheduling the RAR, and the added information field carries the indication information of the PRACH identity of the PRACH opportunity associated with the DCI to indicate the PRACH opportunity corresponding to the RAR DCI. For example, if you need to distinguish N adjacent PRACH opportunities, you need to add ceil(log 2 N) bits are used to indicate the PRACH opportunity. Assuming that 8 PRACH opportunities need to be distinguished, the RAR DCI needs to carry an information field of 3 bits for distinguishing different PRACH opportunities. The specific corresponding rules are shown in Table 1.

[0163] Table 1

[0164]

[0165] Specifically, when the PRACH opportunity in the actual application scenario is greater than N, the modulo N is compared with the information field used to indicate the PRACH opportunity in the RAR DCI. Taking Table 1 as an example, if the value of the information field used to distinguish different P...

no. 3 Embodiment

[0168] By adding an information field for indicating the PRACH opportunity in the Medium Access Control (Medium Access Control, MAC) RAR, the MAC RAR of different PRACH opportunities can be distinguished through the information field. For example, if it is necessary to distinguish N adjacent PRACH opportunities, it is necessary to add ceil(log 2 N) bits are used to indicate the PRACH opportunity. Assuming that 8 PRACH opportunities need to be distinguished, the MAC RAR needs to carry a 3-bit information field to distinguish different PRACH opportunities. The specific corresponding rules are shown in Table 2.

[0169] Table 2

[0170]

[0171] Specifically, when the number of actually applied PRACH opportunities is greater than N, the PRACH opportunity associated with the RAR is determined by comparing with the information field in the RAR used to indicate the PRACH opportunity modulo N. Taking Table 2 as an example, for example, the value of the information field used to ...

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Abstract

The present invention discloses a random access response RAR transmission method and related equipment, which are used to solve the problem that the RAR windows of multiple PRACH opportunities overlap and different PRACH opportunities may correspond to the same RA-RNTI, which causes the UE and the base station to be confused. The understanding of RAR DCI is not the same problem. The method is as follows: the terminal determines a PRACH opportunity for sending a preamble, and determines a PRACH identifier corresponding to the PRACH opportunity for sending a preamble, wherein the PRACH identifiers corresponding to each of the consecutive PRACH opportunities are different; the terminal After the preamble is sent in the PARCH opportunity for sending the preamble, according to the PRACH identifier corresponding to the PRACH opportunity for sending the preamble, monitor and receive the preamble for sending in the random access response window The random access response RAR corresponding to the PRACH opportunity.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a random access response RAR transmission method and related equipment. Background technique [0002] In the Long Term Evolution (LTE) system, random access is divided into contention random access and non-contention random access, such as figure 1 Shown is a schematic diagram of the contention random access process, such as figure 2 Shown is a schematic diagram of a non-contention random access process. [0003] During the random access process, the base station (eNB) configures a preamble (Preamble) format, a Preamble, and a physical random access channel (Physical Random Access Channel, PRACH) resource for sending the Preamble. Taking frequency division duplex (FDD, Frequency Division Duplex) as an example, assuming that the network uses configuration number 26 to configure PRACH resources, the PRACH resources corresponding to configuration number 26 refer to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W48/12H04W72/12H04W74/00H04W74/08
CPCH04W48/12H04W74/0866H04W72/23H04W74/002
Inventor 王磊邢艳萍
Owner DATANG MOBILE COMM EQUIP CO LTD
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