Random access method, network device, and terminal

Patent metadata

Field	Value
Publication number	US-2020281025-A1
Application number	US-202016875292-A
Country	US
Kind code	A1
Filing date	May 15, 2020
Priority date	Nov 17, 2017
Publication date	Sep 3, 2020
Grant date	—

Abstract

A random access method includes determining, by a network device, configuration information and sending the configuration information to a terminal. The configuration information indicates at least a quantity of random access preambles transmitted on one random access resource, a quantity of contention-based random access preambles transmitted on the one random access resource, a quantity of contention-free random access preambles transmitted on the one random access resource, the quantity of random access preambles associated with one downlink signal, the quantity of contention-free random access preambles associated with the one downlink signal, the quantity of contention-based random access preambles associated with the one downlink signal, or a quantity of transmitted downlink signals associated with the one random access resource.

First claim

What is claimed is:

1 . A random access method, comprising:
determining, by a network device, configuration information, wherein the configuration information indicates at least:
a quantity of random access preambles transmitted on one random access resource,
a quantity of contention-based random access preambles transmitted on the one random access resource,
a quantity of contention-free random access preambles transmitted on the one random access resource,
the quantity of random access preambles associated with one downlink signal,
the quantity of contention-free random access preambles associated with the one downlink signal,
the quantity of contention-based random access preambles associated with the one downlink signal, or
a quantity of transmitted downlink signals associated with the one random access resource; and
sending, by the network device, the configuration information to a terminal.

2 . The method according to claim 1 , wherein the quantity of transmitted downlink signals associated with the one random access resource is determined based on at least one of a transmitted downlink signal or a group of transmitted downlink signals.

3 . The method according to claim 1 , wherein the configuration information comprises an index of the quantity of transmitted downlink signals associated with the one random access resource in response to the configuration information that indicates the quantity of transmitted downlink signals associated with the one random access resource.

4 . The method according to claim 3 , further comprising:
determining, by the network device, a quantity of bits occupied by the index of the quantity of transmitted downlink signals associated with the one random access resource based on a quantity of transmitted downlink signals.

5 . The method according to claim 1 , further comprising:
determining, by the network device, a quantity of bits in the configuration information that are occupied by an index of the quantity of contention-based random access preambles transmitted on the one random access resource based on the quantity of random access preambles transmitted on the one random access resource.

6 . The method according to claim 1 , further comprising:
determining, by the network device, a quantity of bits in the configuration information that are occupied by an index of the quantity of random access preambles associated with the one downlink signal based on the quantity of transmitted downlink signals associated with the one random access resource.

7 . The method according to claim 1 , wherein indices of the random access preambles associated with the one downlink signal are inconsecutive random access preamble indices or consecutive random access preamble indices.

8 . The method according to claim 1 , wherein the configuration information indicates:
the quantity of random access preambles transmitted on the one random access resource, the quantity of contention-free random access preambles associated with the one downlink signal, and the quantity of transmitted downlink signals associated with the one random access resource; or the quantity of contention-free random access preambles associated with the one downlink signal, and the quantity of transmitted downlink signals associated with the one random access resource.

9 . A random access method, comprising:
receiving, by a terminal, configuration information from a network device, wherein the configuration information indicates at least:
a quantity of random access preambles transmitted on one random access resource,
a quantity of contention-based random access preambles transmitted on the one random access resource,
a quantity of contention-free random access preambles transmitted on the one random access resource,
the quantity of random access preambles associated with one downlink signal,
the quantity of contention-free random access preambles associated with the one downlink signal,
the quantity of contention-based random access preambles associated with the one downlink signal, or
a quantity of transmitted downlink signals associated with the one random access resource;
determining, by the terminal, a random access resource associated with a transmitted downlink signal based on the configuration information; and sending, by the terminal, a random access preamble to the network device based on the random access resource associated with the transmitted downlink signal.

10 . The method according to claim 9 , wherein a quantity of bits occupied by an index of the quantity of transmitted downlink signals associated with the one random access resource is determined based on a quantity of transmitted downlink signals.

11 . The method according to claim 9 , wherein a quantity of bits in the configuration information that are occupied by an index of the quantity of contention-based random access preambles transmitted on the one random access resource is determined based on the quantity of random access preambles transmitted on the one random access resource.

12 . The method according to claim 9 , wherein a quantity of bits in the configuration information that are occupied by an index of the quantity of random access preambles associated with the one downlink signal is determined based on the quantity of transmitted downlink signals associated with the one random access resource.

13 . A network device, comprising:
a processor, configured to determine configuration information, wherein the configuration information indicates at least:
a quantity of random access preambles transmitted on one random access resource,
a quantity of contention-based random access preambles transmitted on the one random access resource,
a quantity of contention-free random access preambles transmitted on the one random access resource,
the quantity of random access preambles associated with one downlink signal,
the quantity of contention-free random access preambles associated with the one downlink signal,
the quantity of contention-based random access preambles associated with the one downlink signal, or
a quantity of transmitted downlink signals associated with the one random access resource; and
a transmitter, configured to send the configuration information to a terminal.

14 . The network device according to claim 13 , wherein the quantity of transmitted downlink signals associated with the one random access resource is determined based on at least one of a transmitted downlink signal or a group of transmitted downlink signals.

15 . The network device according to claim 13 , wherein the configuration information comprises an index of the quantity of transmitted downlink signals associated with the one random access resource in response to the configuration information that indicates the quantity of transmitted downlink signals associated with the one random access resource.

16 . The network device according to claim 13 , wherein the processor is further configured to determine a quantity of bits in the configuration information that are occupied by an index of the quantity of random access preambles associated with the one downlink signal based on the quantity of transmitted downlink signals associated with the one random access resource.

17 . A terminal, comprising:
a receiver, configured to receive configuration information from a network device, wherein the configuration information indicates at least:
a quantity of random access preambles transmitted on one random access resource,
a quantity of contention-based random access preambl

Assignees

• Huawei Tech Co Ltd

Inventors

• Huang Huang
• Yan Mao
• Gao Kuandong
• Shao Hua

Classifications

• H04W74/006 Primary

  in the downlink, i.e. towards the terminal · CPC title

• H04W74/0838

  using contention-free random access [CFRA] · CPC title

• H04W74/0833 Primary

  Random access procedures, e.g. with 4-step access · CPC title

• Y02D30/70

  in wireless communication networks · CPC title

• H04W74/02

  Hybrid access · CPC title