PDCCH transmission method and system for bandwidth aggregation on a mobile communications system

• US 9,007,931 B2
• Filed: 01/15/2010
• Issued: 04/14/2015
• Est. Priority Date: 01/15/2009
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd., University-Industry Cooperation Foundation of Kyung HEE University
• Original Assignee: Korea Aerospace University, Samsung Electronics Co. Ltd.
• Inventors: Lee, Sang Min, Lee, Ju Mi, Kim, Yung Soo, Jung, Young Ho
• Primary Examiner(s): Hamza, Faruk
• Assistant Examiner(s): DECKER, CASSANDRA L
• Application Number:
  US13/144,806
• Publication Number:
  US 20110274074A1
• Time in Patent Office: 1,915 Days
• Field of Search: None
• US Class Current: 370/252
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 36/06 Reselecting a communication resource in the serving access point
• CPC Class Codes: H04W 72/00 Local resource management
• 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 88/08 Access point devices

Abstract

The present invention relates to a PDCCH transmission method for a base station on a mobile communications system supporting bandwidth aggregation, and more particularly the invention relates to a PDCCH transmission method comprising the step of generating downlink control data comprising resource-allocation configuration data for any desired sub-band and a sub-band other than the desired sub-band, and the step of transmitting the generated downlink control data to a mobile station through the PDCCH of the desired sub-band, and the invention also relates to a system therefor comprising a mobile station.

Claims

1. A Physical Downlink Control Channel (PDCCH) transmission method of a base station in a mobile communication system supporting bandwidth aggregation, the method comprising:

generating downlink control information including resource allocation configuration information for a first band, a second band, and a guard band between the first band and the second band; and

transmitting the downlink control information to a mobile terminal in a PDCCH of the first band, and

wherein the resource allocation configuration information comprises a carrier index field indicating resource allocation in the first band, the second band and the guard band respectively.

2. The method of claim 1, wherein the resource allocation configuration information further comprises:

a primary band switching flag indicating switching the first band monitored by the mobile terminal for receiving the PDCCH, and

a time flag indicating whether the received downlink control information is for a resource allocation in a current frame.

3. The method of claim 2, wherein the resource allocation configuration information further comprises a resource block assignment field;

and

a size of a resource block indicated by a unit bit of the resource block assignment field is changed based on the value of the carrier index field.

4. The method of claim 2, wherein the resource allocation configuration information further comprises a resource block assignment field;

and

a range of resource blocks indicated by a unit bit of the resource block assignment field is limited based on the value of the carrier index field.

5. The method of claim 1, wherein the carrier index field is 3 bits and a form of bitmap.

6. A base station for transmitting Physical Downlink Control Channel (PDCCH) in a mobile communication system supporting bandwidth aggregation, the base station performing the operations of:

generating downlink control information containing resource allocation configuration information for a first band, a second band, and a guard band between the first band and the second band, and

transmitting the downlink control information to a mobile terminal in a PDCCH of the first band,

wherein the resource allocation configuration information comprises a carrier index field indicating resource allocation in the first band, the second band and the guard band respectively.

7. The base station of claim 6, wherein the resource allocation configuration information further comprises a primary band switching flag indicating switching the first band monitored by the mobile terminal for receiving the PDCCH, and a time flag indicating whether the received downlink control information is for a resource allocation in a current frame.

8. The base station of claim 7, wherein the resource allocation configuration information further comprises a resource block assignment field;

and

a size of a resource block indicated by a unit bit of the resource block assignment field is changed based on the value of the carrier index field.

9. The base station of claim 7, wherein the resource allocation configuration information further comprises a resource block assignment field;

and

a range of resource blocks indicated by a unit bit of the resource block assignment field is limited based on the value of the carrier index field.

10. The base station of claim 6, wherein the carrier index field is 3 bits and a form of bitmap.