Random access method, base station and terminal

• US 9,769,831 B2
• Filed: 02/10/2015
• Issued: 09/19/2017
• Est. Priority Date: 08/10/2012
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Yu, Zheng, Nan, Fang, Zhang, Ningbo, Cheng, Xingqing
• Primary Examiner(s): Sheikh, Ayaz
• Assistant Examiner(s): Ghafoerkhan, Faiyazkhan
• Application Number:
  US14/618,330
• Publication Number:
  US 20150156760A1
• Time in Patent Office: 952 Days
• Field of Search: None
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

A random access method, a base station and a terminal are disclosed. The method includes: receiving, by a base station, a preamble sequence that is sent by a terminal during random access; identifying a type of the terminal according to the preamble sequence; and sending, according to the type of the terminal, a message of a random access procedure to the terminal on processing bandwidth supported by the terminal.

Claims

1. A random access method, comprising:

preconfiguring a first random access resource configuration table, wherein the first random access resource configuration table comprises an indication relationship between a random access configuration index and a first time domain resource and a second time domain resource;

configuring a first time domain resource and a second time domain resource different from the first time domain resource for an ordinary terminal and an MTC terminal, respectively, using a same random access configuration index; and

notifying a terminal of a parameter for performing a random access procedure through RRC broadcast or unicast signaling, wherein the RRC broadcast or unicast signaling comprises a random access configuration index configured for the terminal;

receiving, by a base station, a preamble sequence that is sent by the terminal during random access;

identifying, according to the preamble sequence, whether the terminal is an ordinary terminal or a machine type communication (MTC) terminal, wherein identifying whether the terminal is an ordinary terminal or a MTC terminal comprises determining that the terminal is an ordinary terminal when the preamble sequence sent by the terminal is detected on the first time domain resource indicated by the random access configuration index, and determining that the terminal is an MTC terminal when the preamble sequence sent by the terminal is detected on the second time domain resource indicated by the random access configuration index; and

sending, according to the identification of whether the terminal is an ordinary terminal or a MTC terminal, a message of a random access procedure to the terminal on processing bandwidth supported by the terminal.

2. The random access method according to claim 1, wherein the preamble sequence that is sent by a terminal during random access is borne through a physical random access channel.

3. The random access method according to claim 1, wherein the preamble sequence is formed of a sequence duration and a cyclic prefix.

4. A random access method, comprising:

receiving, by a terminal, a parameter for performing random access notified by a base station for the terminal through RRC broadcast or unicast signaling, wherein the RRC broadcast or unicast signaling comprises indication information of a first frequency domain resource configured for the terminal, and the indication information of the first frequency domain resource comprises a physical random access channel frequency offset (prach-Frequencyoffset) and/or a random access configuration index;

sending, by the terminal, a preamble sequence to the base station during random access, the preamble sequence being sent to the base station on a frequency domain resource that is selected by the terminal according to whether the terminal is an ordinary terminal or a machine type communication (MTC) terminal; and

receiving a message of a random access procedure that the base station sends to the terminal after identifying whether the terminal is an ordinary terminal or a MTC terminal according to the preamble sequence, the message received on processing bandwidth supported by the terminal;

wherein sending the preamble sequence to the base station on a frequency domain resource corresponding to the type of the terminal comprises sending a preamble sequence to the base station on the first frequency domain resource when the terminal is an ordinary terminal; and

offsetting the first frequency domain resource according to a designated frequency domain resource offset value, and sending a preamble sequence to the base station on an offset frequency domain resource when the terminal is an MTC terminal.

5. The method according to claim 4, wherein receiving the parameter for performing the random access comprises:

receiving a first physical random access channel frequency offset (prach-Frequencyoffset) configured for an ordinary terminal and used as indication information of the first frequency domain resource, and a second physical random access channel frequency offset (prach-Frequencyoffset) configured for an MTC terminal and used as indication information of the second frequency domain resource, wherein the first physical random access channel frequency offset (prach-Frequencyoffset) and the second physical random access channel frequency offset (prach-Frequencyoffset) are notified by the base station in the RRC broadcast or unicast signaling.

6. The method according to claim 4, wherein receiving the parameter for performing the random access comprises:

receiving a first random access configuration index configured for an ordinary terminal and used as indication information of the first frequency domain resource, and a second random access configuration index configured for an MTC terminal and used as indication information of the second frequency domain resource, wherein the first random access configuration index and the second random access configuration index are notified by the base station in the RRC broadcast or unicast signaling.

7. The method according to claim 4, wherein receiving the parameter for performing the random access comprises:

receiving a same random access configuration index configured for an ordinary terminal and an MTC terminal and used as indication information of the first frequency domain resource and indication information of a second frequency domain resource, wherein the same random access configuration index is notified by the base station in the RRC broadcast or unicast signaling, and is used to indicate the first frequency domain resource and the second frequency domain resource for the ordinary terminal and the MTC terminal respectively.

8. A base station, comprising:

a receiver, configured to receive a preamble sequence that is sent by a terminal during random access;

a processor, configured to;

preconfigure an ordinary terminal resource configuration table and an MTC terminal resource configuration table, wherein the ordinary terminal resource configuration table comprises an indication relationship between a first random access configuration index and a first time domain resource, and the MTC terminal resource configuration table comprises an indication relationship between a second random access configuration index and a second time domain resource;

notify the terminal of a parameter for performing the random access through RRC broadcast or unicast signaling, wherein the RRC broadcast or unicast signaling comprises a first random access configuration index configured for an ordinary terminal, and a second random access configuration index configured for an MTC terminal;

identify a type of the terminal according to a time domain resource on which the preamble sequence is received, wherein identifying the type of the terminal comprises determining, when the preamble sequence sent by the terminal is detected on the first time domain resource indicated by the first random access configuration index, that the terminal is an ordinary terminal, and determining, when the preamble sequence sent by the terminal is detected on the second time domain resource indicated by the second random access configuration index, that the terminal is an MTC terminal; and

a transmitter, configured to send, according to the type of the terminal, a message of a random access procedure to the terminal on processing bandwidth supported by the terminal.

9. The base station according to claim 8, wherein the receiver is configured to receive the preamble sequence that is borne through a physical random access channel.

10. The base station according to claim 8, wherein the preamble sequence is formed of a sequence duration and a cyclic prefix.