Method and apparatus for operating system in cellular mobile communication system

• US 9,769,717 B2
• Filed: 12/18/2015
• Issued: 09/19/2017
• Est. Priority Date: 12/19/2014
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Park, SoonGi
• Primary Examiner(s): Patel, Parth
• Application Number:
  US14/973,795
• Publication Number:
  US 20160183233A1
• Time in Patent Office: 641 Days
• CPC Class Codes: H04B 7/0408 using two or more beams, i.e. beam diversity
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0062 Avoidance of ingress interference, e.g. ham radio channels
• CPC Class Codes: H04W 16/28 using beam steering
• CPC Class Codes: H04W 16/30 Special cell shapes, e.g. doughnuts or ring cells
• CPC Class Codes: H04W 36/0066 of control information between different types of networks in order to establish a new radio link in the target network
• CPC Class Codes: H04W 36/0072 of resource information of target access point

Abstract

A base station including a plurality of antenna assemblies in a mobile communication system divides an ultra wideband into a plurality of unit-bands (UBs), forms a plurality of beams by the plurality of antenna assemblies, groups a plurality of beam component carriers distinguished by the plurality of UBs into beam component carriers that belong to the same UB to operate the grouped beam component carriers as a plurality of cells, and configures one cell among the plurality of cells as a cell for movement of a terminal.

Claims

1. A method for operating a system in a base station that operates an ultra wideband as a frequency resource, including a plurality of antenna assemblies in a mobile communication system, the method comprising:

dividing an ultra wideband into a plurality of unit-bands (UBs);

forming a plurality of spot beams by the plurality of antenna assemblies;

grouping a plurality of beam component carriers (BBCs) distinguished by the plurality of UBs into BBCs that belong to the same UB with respect to each spot beam to operate the grouped BBCs as a plurality of cells;

configuring one cell among the plurality of cells to support movement of a terminal; and

allocating the frequency resource of a data domain for the same UB at the same time for a plurality of terminals by pairing the cells based on cells that do not interfere with each other and allocating the same resource to the paired cells to transmit different information to the data domain among the paired cells.

2. The method of claim 1, wherein

the allocating includes

estimating interference based on feedback information from the plurality of terminals and,

pairing BBCs in which the interference does not occur, and

the feedback information includes information on a reference signal of a detected BBC.

3. The method of claim 1, wherein

the configuring includes

transmitting a common reference signal through the plurality of BBCs constituting each cell, and

supporting a cell handover, when cell handover is determined based on an average value of a received strength measured from the common reference signal by the terminal.

4. The method of claim 1, wherein

the configuring includes

transmitting unique reference signals from the plurality of BBCs constituting each cell, respectively, and

supporting a beam switching, when beam switching is determined based on the received strength of the reference signal by the terminal.

5. The method of claim 1, further comprising:

transmitting measurement control information associated with beam tracking to the terminal through system information of a cell in which the terminal resides when the terminal is in an idle state; and

transmitting the measurement control information through a dedicated channel of an accessed cell when the terminal is in an accessed state,

wherein the cell handover or the beam switching is determined by the terminal based on the beam tracking.

6. The method of claim 1, wherein

the configuring includes aggregating residual BBCs other than a BBC of a cell for movement of the terminal among a plurality of BBCs in a beam in which the terminal resides.

7. The method of claim 1, wherein

the cell for the movement of the terminal is a cell of the same UB as a neighboring base station or a cell of a different UB from the neighboring base station.

8. The method of claim 1, wherein

the configuring includes executing advanced resource preparation of at least one neighboring beam corresponding to 1 tier around a beam which the terminal currently accesses in the configured cell.

9. The method of claim 8, wherein

the configuring further includes

changing, by the terminal, a radio access link from a serving beam of the configured cell to a target beam,

performing resource release of beams of which advanced resource preparation is not required among beams of which advanced resource preparation is made, and

executing the advanced resource preparation of new beams of which advanced resource preparation is required.

10. The method of claim 9, wherein

the changing includes recovering, by the terminal, a failure of the radio access link to the target beam when the failure is detected in the radio access link with the serving beam.

11. The method of claim 10, wherein

the recovering includes requesting and receiving context information of the terminal from the neighboring base station when there is no context information of the terminal.

12. The method of claim 9, wherein

the target beam is a beam controlled by a base station controlling the serving beam or includes a beam controlled by a base station different from the base station controlling the serving beam.

13. The method of claim 9, wherein

the target beam is the serving beam or includes a different beam from the serving beam.

14. The method of claim 8, wherein

the configuring further includes transmitting advanced resource preparation information of at least one neighboring beam to the terminal.

15. An apparatus for operating a system in a base station that operates an ultra wideband as a frequency resource, including a plurality of beam in a mobile communication system, the apparatus comprising:

a processor dividing an ultra wideband into a plurality of unit-bands (UBs), forming a plurality of spot beams by the plurality of antenna assemblies;

grouping a plurality of beam component carriers (BBCs) distinguished by the plurality of UBs into BBCs, that belong to the same UB with respect to each spot beam to operate the grouped BBCs as a plurality of cells;

allocating the frequency resource of a data domain for the same UB at the same time for a plurality of terminals by pairing the cells based on cells that do not interfere with each other and allocating the same resource to the paired cells to transmit different information to the data domain among the paired cells; and

a transceiver transceiving signaling for the movement of the terminal with the terminal or an adjacent base station.

16. The apparatus of claim 15, wherein the processor aggregates and operates residual BCCs other than a BCC of a cell for movement of the

terminal among a plurality of BCCs in a beam in which the terminal resides.

17. The apparatus of claim 15, wherein the processor executes advanced resource preparation of at least one neighboring beam corresponding to 1 tier around a beam which the terminal currently accesses in the configured cell, and when the terminal changes a radio access link from a serving beam to a target beam, the processor performs resource release of beams of which advanced resource preparation is not required among beams of which advanced resource preparation is made, and executes the advanced resource preparation of new beams of which advanced resource preparation is required.

18. The apparatus of claim 15, wherein the transceiver receives a context information request of the terminal from the neighboring base station, and the processor verifies context information of the corresponding terminal and transmits the context information of the corresponding terminal through the transceiver.