Random Access Method, Base Station and Terminal

• US 20150156760A1
• Filed: 02/10/2015
• Published: 06/04/2015
• 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, Cheng, Xingqing, Nan, Fang, Zhang, Ningbo
• Granted Patent: US 9,769,831 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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:

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.

2. The method according to claim 1, wherein identifying the type of the terminal comprises:

identifying the type of the terminal according to a time domain resource for sending the preamble sequence; and

/or

identifying the type of the terminal according to a frequency domain resource for sending the preamble sequence; and

/or

identifying the type of the terminal according to a type of the preamble sequence.

3. The method according to claim 2, further 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 as well as 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, by using a same random access configuration index; and

notifying 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 random access configuration index configured for the terminal;

wherein identifying the type of the terminal according 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 one 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 one random access configuration index.

4. The method according to claim 2, further comprising:

preconfiguring 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; and

notifying 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;

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 one 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 one second random access configuration index, that the terminal is an MTC terminal.

5. The method according to claim 2, further comprising:

notifying the terminal of a parameter for performing the random access through RRC broadcast or unicast signaling, wherein the RRC broadcast or unicast signaling comprises indication information of a first frequency domain resource configured for an ordinary terminal, and indication information of a second frequency domain resource configured for an MTC terminal;

wherein identifying the type of the terminal comprises determining that the terminal is an ordinary terminal when the terminal sends a preamble sequence on the first frequency domain resource is detected, and determining that the terminal is an MTC terminal when that the terminal sends a preamble sequence on the second frequency domain resource is detected, wherein the first frequency domain resource and the second frequency domain resource are different frequency domain resources.

6. The method according to claim 5, wherein notifying the terminal of a parameter for performing the random access through RRC broadcast or unicast signaling comprises:

notifying, in the RRC broadcast or unicast signaling, 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; and

/or

notifying, in the RRC broadcast or unicast signaling, 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; and

/or

notifying, in the RRC broadcast or unicast signaling, 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 the second frequency domain resource, wherein the same random access configuration index is used to indicate the first frequency domain resource and the second frequency domain resource for the ordinary terminal and the MTC terminal respectively.

7. The method according to claim 2, further comprising:

notifying the terminal of a parameter for performing the random access 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;

wherein identifying the type of the terminal comprises determining that the terminal is an ordinary terminal when that the terminal sends a preamble sequence on the first frequency domain resource is detected, and determining that the terminal is an MTC terminal when that a frequency domain resource on which the terminal sends the preamble sequence is a frequency domain resource obtained after the first frequency domain resource is offset according to a designated frequency domain resource offset value is detected.

8. The method according to claim 2, wherein identifying the type of the terminal comprises determining, when a first preamble sequence sent by the terminal is received, that the terminal is an ordinary terminal, and determining, when a second preamble sequence sent by the terminal is received, that the terminal is an MTC terminal, wherein the first preamble sequence is comprised in existing preamble sequences and the second preamble sequence is comprised in several preamble sequences newly defined for the MTC terminal, or wherein the first preamble sequence is comprised in preamble sequences of the existing preamble sequences except dedicated sequences and the second preamble sequence is comprised in several preamble sequences into which the dedicated sequence are divided.

9. The method according to claim 8, wherein a division manner in which the second preamble sequence is several preamble sequences into which the dedicated sequence is divided comprises:

notifying the quantity of sequences;

serving as the second preamble sequence, in the dedicated sequence through RRC broadcast or unicast signaling; and

obtaining the second preamble sequence according to the sequence quantity and a sequence number of an initial sequence designated as the second preamble sequence;

wherein the sequence number of the designated initial sequence is a sequence number of an initial sequence notified through RRC broadcast or unicast signaling, or a sequence number of a preconfigured initial sequence, or a sequence number of an initial sequence obtained according to the sequence quantity.

10. A random access method, comprising:

sending, by a terminal, a preamble sequence to a base station according to a type of the terminal during random access; and

receiving a message of a random access procedure that the base station sends to the terminal after identifying the type of the terminal according to the preamble sequence, the message received on processing bandwidth supported by the terminal.

11. The method according to claim 10, wherein sending the preamble sequence to the base station comprises:

sending the preamble sequence to the base station on a time domain resource corresponding to the type of the terminal; and

/or

sending the preamble sequence to the base station on a frequency domain resource corresponding to the type of the terminal; and

/or

sending the preamble sequence corresponding to the type of the terminal to the base station.

12. The method according to claim 11, further 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 as well as a second time domain resource; and

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, by using a same random access configuration index; and

receiving, by the terminal, a parameter for performing the random access notified by the base station for the terminal through RRC broadcast or unicast signaling, wherein the RRC broadcast or unicast signaling comprises a random access configuration index configured for the terminal;

wherein sending the preamble sequence to the base station on a time domain resource corresponding to the type of the terminal comprises sending, by the terminal, a preamble sequence to the base station on the first time domain resource indicated by the one random access configuration index when the terminal is an ordinary terminal, and sending, by the terminal, a preamble sequence to the base station on the second time domain resource indicated by the one random access configuration index when the terminal is an MTC terminal.

13. The method according to claim 11, further comprising:

preconfiguring, by the terminal, an ordinary terminal resource configuration table when the terminal is an ordinary terminal, and preconfiguring, by the terminal, an MTC terminal resource configuration table when the terminal is an MTC terminal, 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; and

receiving, by the terminal, a parameter for performing random access notified by the base station for the terminal 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;

wherein sending the preamble sequence to the base station on the time domain resource corresponding to the type of the terminal comprises sending, by the terminal, a preamble sequence to the base station on the first time domain resource indicated by the one first random access configuration index when the terminal is an ordinary terminal; and

sending, by the terminal, a preamble sequence to the base station on the second time domain resource indicated by the one second random access configuration index when the terminal is an MTC terminal.

14. The method according to claim 11, further comprising:

receiving, by the terminal, a parameter for performing the random access notified by the 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 an ordinary terminal, and indication information of a second frequency domain resource configured for an MTC 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 sending a preamble sequence to the base station on the second frequency domain resource when the terminal is an MTC terminal, wherein the first frequency domain resource and the second frequency domain resource are different frequency domain resources.

15. The method according to claim 14, 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; and

/or

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; and

/or

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 the 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.

16. The method according to claim 11, further comprising:

receiving, by the terminal, a parameter for performing the random access notified by the 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;

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.

17. The method according to claim 11, wherein sending the preamble sequence corresponding to the type of the terminal to the base station comprises sending a first preamble sequence to the base station when the terminal is an ordinary terminal, and sending a second preamble sequence to the base station when the terminal is an MTC terminal;

and

wherein the first preamble sequence is comprised in existing preamble sequences, and the second preamble sequence is comprised in several preamble sequences newly defined for the MTC terminal;

or, the first preamble sequence is comprised in preamble sequences of the existing preamble sequences except dedicated sequences, and the second preamble sequence is comprised in several preamble sequences into which the dedicated sequence are divided.

18. The method according to claim 17, wherein a division manner in which the second preamble sequence is several preamble sequences into which the dedicated sequence is divided comprises receiving the quantity of sequences, serving as the second preamble sequence, in the dedicated sequence and notified by the base station through RRC broadcast or unicast signaling, and obtaining the second preamble sequence according to the sequence quantity and a sequence number of an initial sequence designated as the second preamble sequence, wherein the sequence number of the designated initial sequence is a received sequence number of an initial sequence notified by the base station through RRC broadcast or unicast signaling, or a sequence number of a preconfigured initial sequence, or a sequence number of an initial sequence obtained according to the sequence quantity.

19. 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 identify a type of the terminal according to the preamble sequence; 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.

20. The base station according to claim 19, wherein the processor is configured to identify the type of the terminal according to a time domain resource for sending the preamble sequence, and/or identify the type of the terminal according to a frequency domain resource for sending the preamble sequence, and/or identify the type of the terminal according to a type of the preamble sequence.