Radio communication system and communication control method

• US 9,634,740 B2
• Filed: 01/30/2012
• Issued: 04/25/2017
• Est. Priority Date: 01/30/2012
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Liu, Le, Kakura, Yoshikazu, Ishii, Naoto, Inoue, Takamichi
• Primary Examiner(s): Wu, Jianye
• Application Number:
  US14/375,521
• Publication Number:
  US 20150043457A1
• Time in Patent Office: 1,912 Days
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04J 11/0053 using co-ordinated multipoint transmission/reception co-ordinated antenna or beam-forming aspects H04B7/022
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/1273 of downlink data flows
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems

Abstract

A radio communication system includes: a plurality of cells having different scrambling sequences, respectively, wherein at least two cells communicate with at least two user terminals connected to different serving cells; and a controller which controls the plurality of cells and provides a single scrambling sequence to said at least two cells and said at least two user terminals for control signal transmission and reception.

Claims

1. A base station, comprising:

a controller configured to;

scramble a first scheduling assignment by a first scrambling sequence, the first scrambling sequence being initialized with a first scrambling initialization parameter, c_init,1, as follows;

2. The base station of claim 1, wherein the virtual ID is independent of the cell ID.

4. The UE of claim 1, wherein the virtual ID is independent of the cell ID.

3. A user equipment (UE), comprising:

a receiver configured to;

receive, from a base station, a scrambled first scheduling assignment carried on a PDCCH, the scrambled first scheduling assignment being scrambled by a first scrambling sequence that is initialized with a first scrambling initialization parameter, c_init,1, as follows;

5. A method for transmitting scheduling assignments, comprising:

scrambling a first scheduling assignment by a first scrambling sequence, the first scrambling sequence being initialized with a first scrambling initialization parameter, c_init,1, as follows;

6. The method of claim 5, wherein the virtual ID is independent of the cell ID.

7. A method for receiving scheduling assignments, comprising:

receiving, from a base station, a scrambled first scheduling assignment carried on a PDCCH, the scrambled first scheduling assignment being scrambled by a first scrambling sequence that is initialized with a first scrambling initialization parameter, c_init,1, as follows;

8. The method of claim 7, wherein the virtual ID is independent of the cell ID.