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Random access response RAR transmission method and related device

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: 2017-05-17
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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  • Random access response RAR transmission method and related device
  • Random access response RAR transmission method and related device
  • Random access response RAR transmission method and related device

Examples

Experimental program
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Effect test

no. 1 Embodiment

[0154] The RA-RNTI set corresponding to a PRACH repetition level is determined by a predefined or semi-static network configuration method, 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 determine the RA-RNTI of each PRACH opportunity cyclically according to the sequence of each RA-RNTI in the set. Assuming that the initial PRACH opportunity corresponds to the first RA-RNTI in the set, 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, using a predefined value as the starting RA-RNTI, the network configures the...

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 identifier 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 between N adjacent PRACH opportunities, you need to add ceil(log 2 N) bits are used to indicate PRACH opportunities. Assuming that 8 PRACH opportunities need to be distinguished, the RAR DCI needs to carry a 3bit information field 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 PRACH op...

no. 3 Embodiment

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

[0169] Table 2

[0170]

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

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Abstract

The invention discloses a random access response RAR transmission method and a related device in order to solve the problem that UE (User Equipment) and a base station have different understandings of RAR DCI ((Downlink Control Information) as the RAR windows of multiple PRACH (Physical Random Access Channel) opportunities overlap and different PRACH opportunities may correspondingly map out the same RA-RNTI (Random Access-Radio Network Temporary Identity). The method comprises the following steps: a terminal determines a PRACH opportunity for preamble sending, and determines the PRACH identity corresponding to the PRACH opportunity for preamble sending, wherein the PRACH identities corresponding to multiple continuous PRACH opportunities are different; and after sending a preamble in the PRACH opportunity for preamble sending, the terminal monitors and receives a random access response RAR corresponding to the PRACH opportunity for preamble sending in a random access response window according to the PRACH identity corresponding to the PRACH opportunity for preamble sending.

Description

Technical field [0001] The present invention relates to the field of communication technology, and 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 competitive random access and non-competitive random access, such as figure 1 Shown is a schematic diagram of the competitive random access process, such as figure 2 Shown is a schematic diagram of the non-contention random access process. [0003] In the random access process, a base station (eNB) configures a preamble (Preamble) format, a preamble, and physical random access channel (PRACH) resources for sending the preamble. Taking Frequency Division Duplex (FDD, Frequency Division Duplex) as an example, suppose that the network uses configuration number 26 to configure PRACH resources. For the PRACH resource corresponding to configuration number 26, refer to Table 5.7.1-2 in TS36.211, namely P...

Claims

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Application Information

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IPC IPC(8): H04W48/12H04W72/12H04W74/00H04W74/08
CPCH04W48/12H04W74/008H04W74/0866H04W72/23
Inventor 王磊邢艳萍
Owner DATANG MOBILE COMM EQUIP CO LTD
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