Method and apparatus for enhanced contention based random access procedure

Patent metadata

Field	Value
Publication number	US-10917879-B2
Application number	US-201715722629-A
Country	US
Kind code	B2
Filing date	Oct 2, 2017
Priority date	Oct 7, 2016
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

A communication method and system for converging a fifth generation (5G) communication system for supporting higher data rates beyond a fourth generation (4G) system with a technology for Internet of things (IoT) are provided. The communication method and system may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method of a user equipment (UE) for performing a random access (RA) procedure is provided. The method includes transmitting a first message including a RA preamble and a UE identifier (ID) to a base station (BS), and receiving a second message including a sequence index of the RA preamble from the BS.

First claim

What is claimed is:

1. A method of a user equipment (UE) for performing a random access (RA) procedure, the method comprising:
transmitting, to a base station (BS), an RA message including an RA preamble on a physical random access channel (PRACH), and a UE identifier (ID) and control information using a resource for data transmission; and
receiving, from the BS, an RA response including the UE
ID and a control message corresponding to the control information.

2. The method of claim 1 , wherein the RA preamble, the UE ID and the control information are time division multiplexed in radio resources.

3. The method of claim 1 , wherein the UE ID includes at least one of a random ID, a system architecture evolution (SAE)-temporary mobile subscriber identity (S-TMSI), a cell-radio network temporary identifier (C-RNTI), or a resume ID.

4. The method of claim 1 , wherein the RA response further includes at least one of a cell-radio network temporary identifier (C-RNTI) or a timing advanced (TA) command.

5. A user equipment (UE) comprising:
a transceiver configured to:
receive signals from a base station (BS), and transmit signals to the BS; and
at least one processor configured to:
control the transceiver to transmit an RA message including a random access (RA) preamble on a physical random access channel (PRACH), and a UE identifier (ID) and control information using a resource for data transmission to the BS, and
control the transceiver to receive an RA response including the UE ID and
a control message corresponding to the control information from the BS.

6. The UE of claim 5 , wherein the RA preamble, the UE ID and the control information are time division multiplexed in radio resources.

7. The UE of claim 5 , wherein the UE ID includes at least one of a random ID, a system architecture evolution (SAE)-temporary mobile subscriber identity (S-TMSI), a cell-radio network temporary identifier (C-RNTI), or a resume ID.

8. The UE of claim 5 , wherein the RA response further includes at least one of a cell-radio network temporary identifier (C-RNTI) or a timing advanced (TA) command.

9. A method of a base station (BS) for performing a random access (RA) procedure, the method comprising:
receiving, from a user equipment (UE), an RA message including an RA preamble on a physical random access channel (PRACH), and a UE identifier (ID) and control information using a resource for data transmission; and
transmitting, to the UE, an RA response including the UE
ID and a control message corresponding to the control information to the UE.

10. The method of claim 9 , wherein the UE ID includes at least one of a random ID, a system architecture evolution (SAE)-temporary mobile subscriber identity (S-TMSI), a cell-radio network temporary identifier (C-RNTI), or a resume ID.

11. The method of claim 9 , wherein the RA response further includes at least one of a cell-radio network temporary identifier (C-RNTI) or a timing advanced (TA) command.

12. A base station (BS) for performing a random access (RA) procedure, the BS comprising:
a transceiver configured to:
receive signals from a user equipment (UE), and
transmit signals to the UE; and

at least one processor configured to:
control to the transceiver to receive an RA message including an RA preamble on a physical random access channel (PRACH), a UE identifier (ID) and control information using a resource for data transmission from the UE, and
control to the transceiver to transmit an RA response including the UE ID, and
a control message corresponding to the control information to the UE.

13. The BS of claim 12 , wherein the UE ID includes at least one of a random ID, a system architecture evolution (SAE)-temporary mobile subscriber identity (S-TMSI), a cell-radio network temporary identifier (C-RNTI), or a resume ID.

14. The BS of claim 12 , wherein the RA response further includes at least one of a cell-radio network temporary identifier (C-RNTI) or a timing advanced (TA) command.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Agiwal Anil
• Chang Youngbin

Classifications

• H04W72/20

  Control channels or signalling for resource management · CPC title

• H04W72/21 Primary

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W74/0836

  with 2-step access · 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