Method for communicating using synchronization signal block in mobile communication system and apparatus for the same

• US 10,595,291 B2
• Filed: 08/10/2018
• Issued: 03/17/2020
• Est. Priority Date: 08/10/2017
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Lee, Jung Hoon, Kim, Cheul Soon, Moon, Sung Hyun, Lee, Kyoung Seok
• Primary Examiner(s): Divito, Walter J
• Application Number:
  US16/100,379
• Publication Number:
  US 20190053176A1
• Time in Patent Office: 585 Days
• CPC Class Codes: H04J 11/0069 Cell search, i.e. determining cell identity [cell-ID] design of multiplexing codes H04J13/00; processing access restriction or access information H04W48/16; discovery of network devices for network data management H04W8/005; sounding signals for channel estimation H04L25/0226; structure of reference signals in multicarrier modulation systems H04L27/2613; frame, time or carrier synchronisation in multicarrier modulation systems H04L27/2655
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/008 once only, on installation
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04W 56/001 Synchronization between nodes
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states

Abstract

A method and an apparatus for communications using synchronization signal blocks. An operation method of a base station in a mobile communication system includes generating a first synchronization signal/physical broadcast channel (SS/PBCH) block including information indicating whether the first SS/PBCH block is used for initial access of the terminal; and transmitting the generated SS/PBCH block in a first bandwidth part (BP).

Claims

1. An operation method of a terminal for initial access to a base station, in a communication system, the operation method comprising:

receiving a first synchronization signal/physical broadcast channel (SS/PBCH) block from the base station;

determining whether the first SS/PBCH block is to be used for initial access to receive system information based on first information included in the first SS/PBCH block; and

in response to determination that the first SS/PBCH block is not to be used for initial access of the terminal, receiving a second SS/PBCH block indicated by second information included in the first SS/PBCH block, and performing initial access to the base station using the second SS/PBCH block,

wherein the second information is an offset between the first SS/PBCH block and the second SS/PBCH block.

2. The operation method according to claim 1, wherein the first information and the second information are included in a PBCH of the first SS/PBCH block.

3. The operation method according to claim 1, wherein the first information is in form of a flag.

4. The operation method according to claim 1, further comprising, in response to determination that the first SS/PBCH block is to be used for initial access of the terminal, performing initial access to the base station using the first SS/PBCH block.

5. An operation method of a terminal for initial access to a base station, in a communication system, the operation method comprising:

receiving a first synchronization signal/physical broadcast channel (SS/PBCH) block from the base station at a first frequency;

determining whether the first SS/PBCH block is to be used for initial access to receive system information based on first information included in the first SS/PBCH block; and

in response to determination that the first SS/PBCH block is not to be used for initial access of the terminal, receiving a second SS/PBCH block indicated by second information included in the first SS/PBCH block, and performing initial access to the base station using the second SS/PBCH block,

wherein the second SS/PBCH block is received from the base station at a second frequency, the second frequency being different from the first frequency.

6. An operation method of a base station for initial access of a terminal, in a communication system, the operation method comprising:

transmitting a first synchronization signal/physical broadcast channel (SS/PBCH) block to a terminal, the first SS/PBCH block including first information indicating whether the first SS/PBCH block is to be used for initial access to receive system information;

transmitting a second SS/PBCH block to the terminal, the second SS/PBCH block being indicated by second information included in the first SS/PBCH block; and

when the first SS/PBCH block is to be used for initial access of the terminal, performing an initial access procedure with the terminal using the second SS/PBCH block to be used for initial access of the terminal,

wherein the second information is an offset between the first SS/PBCH block and the second SS/PBCH block.

7. The operation method according to claim 6, wherein the first information and the second information are included in a PBCH of the first SS/PBCH block.

8. The operation method according to claim 6, wherein the first information is in form of a flag.

9. The operation method according to claim 6, further comprising, when the first SS/PBCH block is to be used for initial access of the terminal, performing an initial access procedure with the terminal using the first SS/PBCH block.

10. An operation method of a base station for initial access of a terminal, in a communication system, the operation method comprising:

transmitting a first synchronization signal/physical broadcast channel (SS/PBCH) block to a terminal at a first frequency, the first SS/PBCH block including first information indicating whether the first SS/PBCH block is to be used for initial access to receive system information;

transmitting a second SS/PBCH block to the terminal, the second SS/PBCH block being indicated by second information included in the first SS/PBCH block; and

when the first SS/PBCH block is to be used for initial access of the terminal, performing an initial access procedure with the terminal using the second SS/PBCH block to be used for initial access of the terminal,

wherein the second SS/PBCH block is transmitted to the terminal at a second frequency, the second frequency being different from the first frequency.