ACCESS CONTROL METHOD AND APPARATUS FOR USE IN MOBILE COMMUNICATION

• US 20180020382A1
• Filed: 07/13/2017
• Published: 01/18/2018
• Est. Priority Date: 07/13/2016
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Sangbum, Kim, Donggun, Sayenko, Alexander, Jang, Jaehyuk, Kim, Soenghun, Van Lieshout, Gert Jan
• Granted Patent: US 10,349,318 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/1819 with retransmission of additional or different redundancy
• CPC Class Codes: H04L 1/189 Transmission or retransmission of more than one copy of a message
• CPC Class Codes: H04W 36/0055 Transmission or use of information for re-establishing the radio link
• CPC Class Codes: H04W 36/0072 of resource information of target access point
• CPC Class Codes: H04W 36/0077 of access information of target access point
• CPC Class Codes: H04W 48/02 Access restriction performed under specific conditions
• CPC Class Codes: H04W 48/10 using broadcasted information
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 8/22 Processing or transfer of terminal data, e.g. status or physical capabilities
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on 5G communication technology and 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 handover method of a terminal in a mobile communication system according to the present disclosure includes transmitting UE capability information including a random access-free handover indicator to a first base station, receiving a handover command message from the first base station, and transmitting, when the handover command message includes uplink resource information, a handover complete message to a second base station based on the uplink resource information.

Claims

1. A method of a user equipment (UE) in a mobile communication system, the method comprising:

transmitting UE capability information including a random access-free handover indicator to a first base station;

receiving a handover command message from the first base station; and

transmitting, when the handover command message includes uplink resource information, a handover complete message to a second base station based on the uplink resource information.

2. The method of claim 1, wherein transmitting the handover complete message comprises:

monitoring, when the handover command message includes no uplink resource information, a physical downlink control channel (PDCCH) of the second base station;

receiving control information on the PDCCH; and

transmitting the handover complete message using uplink resource information included in the control information.

3. The method of claim 2, wherein monitoring the PDCCH comprises:

starting a timer set to a timer value included in the handover command message; and

performing, when no control information is received on the PDCCH before expiry of the timer, a random access procedure.

4. The method of claim 3, wherein the timer value is less than another timer value configured to the UE for determining handover failure.

5. A method of a first base station in a mobile communication system, the method comprising:

receiving user equipment (UE) capability information including a random access-free handover indicator from a UE;

transmitting a handover request message to a second base station;

receiving a handover request acknowledgement (ACK) message; and

transmitting, when the handover request ACK message includes uplink resource information, a handover command message including the uplink resource information to the UE,

wherein the uplink resource information is used for transmission of a handover complete message from the UE to the second base station.

6. The method of claim 5, wherein the handover complete message is transmitted, when the handover command message includes no uplink resource information, based on uplink resource information included control information received on a Physical Downlink Control Channel (PDCCH) of the second base station.

7. The method of claim 6, wherein the handover request ACK message and the handover command message include a timer value, the timer value being less than another timer value included in the UE for determining handover failure.

8. A method of a second base station in a mobile communication system, the method comprising:

receiving a handover request message from a first base station;

transmitting a handover request acknowledgement (ACK) message; and

receiving, when the handover request ACK message includes uplink resource information, a handover complete message from a user equipment (UE) based on the uplink resource information.

9. The method of claim 8, wherein transmitting the handover request ACK message comprises transmitting, when the handover ACK message includes no uplink resource information, control information on a Physical Downlink Control Channel (PDCCH), and

receiving a handover complete message from the UE based on uplink resource information included in the control information.

10. The method of claim 9, wherein the handover request ACK message includes a timer value, the timer value being less than another timer value configured to the UE for determining handover failure.

11. A user equipment (UE) in a mobile communication system, the UE comprising:

a transceiver configured to transmit or receive signals; and

a controller coupled with the transceiver and configured to;

transmit user equipment (UE) capability information including a random access-free handover indicator to a first base station,

receive a handover command message from the first base station, and

transmit, when the handover command message includes uplink resource information, a handover complete message to a second base station based on the uplink resource information.

12. The UE of claim 11, wherein the controller is configured to:

monitor, when the handover command message includes no uplink resource information, a Physical Downlink Control Channel (PDCCH) of the second base station,

receive control information on the PDCCH, and

transmit the handover complete message to the second base station using uplink resource information contained in the control information.

13. The UE of claim 12, wherein the controller starts a timer set to a timer value included in the handover command message and controls, when no control information is received on the PDCCH before expiry of the timer, the UE to perform a random access procedure.

14. The UE of claim 13, wherein the timer value is less than another timer value configured to the UE for determining handover failure.

15. A first base station in a mobile communication system, the first base station comprising:

a transceiver configured to transit or receive signals; and

a controller coupled with the transceiver and configured to;

receive user equipment (UE) capability information including a random access-free handover indicator from a UE,

transmit a handover request message to a second base station,

receive a handover request acknowledgement (ACK) message from the second base station, and

transmit, when the handover request ACK message includes uplink resource information, a handover command message including the uplink resource information to the UE, the uplink resource information being used for transmission of a handover complete message from the UE to the second base station.

16. The first base station of claim 15, wherein the handover complete message is transmitted, when the handover command message includes no uplink resource information, based on uplink resource information of control information received on a Physical Downlink Control Channel (PDCCH) of the second base station.

17. The first base station of claim 16, wherein the handover request ACK message and the handover command message include a timer value, the timer value being less than another timer value included in the UE for determining handover failure.

18. A second base station in a mobile communication system, the second base station comprising:

a transceiver configured to transit or receive signals; and

a controller coupled with the transceiver and configured to;

receive a handover request message from a first base station,

transmit a handover request acknowledgement (ACK) message, and

receive, when the handover request ACK message includes uplink resource information, a handover complete message from a user equipment (UE) based on the uplink resource information.

19. The second base station of claim 18, wherein the controller is configured to:

transmit, when a handover command message includes no uplink resource information, control information on a Physical Downlink Control Channel (PDCCH) and

receive the handover complete message from the UE based on uplink resource information included in the control information.

20. The second base station of claim 19, wherein the handover request ACK message and the handover command message include a timer value, the timer value being less than another timer value configured to the UE for determining handover failure.