Frequency reuse scheme for OFDM system

• US 6,917,580 B2
• Filed: 07/30/2001
• Issued: 07/12/2005
• Est. Priority Date: 08/01/2000
• Status: Active Grant

• Current Assignee: Sony Limited (Sony Group Corp.)
• Original Assignee: Sony Limited (Sony Group Corp.)
• Inventors: Dolle, Thomas, Wang, Zhaocheng, Stirling-Gallacher, Richard, Böhnke, Ralf
• Primary Examiner(s): Kizou, Hassan
• Assistant Examiner(s): ROBERTS, BRIAN S
• Application Number:
  US09/919,263
• Publication Number:
  US 20020034158A1
• Time in Patent Office: 1,443 Days
• Field of Search: 370/343, 370/480, 370/344, 370/209, 370/203, 370/208, 455/447
• US Class Current: 370/203
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 16/02 Resource partitioning among network components, e.g. reuse partitioning
• CPC Class Codes: H04W 16/12 Fixed resource partitioning
• CPC Class Codes: H04W 16/24 Cell structures

Abstract

The present invention relates to a cellular communication system for wireless telecommunication on the basis of an OFDM scheme, comprising a plurality of base stations B, whereby at least one base station B is allocated to each cell C of the communication system and whereby information communicated from the base stations comprises data parts and pilot parts. The present invention further relates to a method for operating such a cellular communication system. The present invention is characterised in that the frequency reuse factor of the data parts is different from a frequency reuse factor of the pilot parts. Hereby, an optimisation between high capacity and reliable and correct channel estimation on the basis of the pilot parts can be achieved.

Claims

1. Cellular communication system for wireless telecommunication on the basis of an orthogonal frequency division multiplex (OFDM) scheme, comprising a plurality of basestations (B), whereby at least one basestation (B) is allocated to each cell (C) of the communication system and whereby information communicated from said basestation comprises data parts and pilot parts, characterized in,

that a frequency reuse factor of the data parts is different from a frequency reuse factor of the pilot parts.

2. Cellular communication system according to claim 1, characterized in,

that the frequency reuse factor of the data parts is smaller than the one of the pilot parts.

3. Cellular communication system according to claim 1, characterized in,

that the frequency reuse factor of the data parts is 3 and the one of the pilot parts is 9.

4. Method for operating a cellular communication system for wireless telecommunication on the basis of an orthogonal frequency division multiplex (OFDM) scheme, whereby information communicated within the cells of the communication system comprises data parts and pilot parts, characterized in,

that a frequency reuse factor of the data parts is different from a frequency reuse factor of the pilot parts.

5. Method for operating a cellular communication system according to claim 4, characterized in,

that the frequency reuse factor of the data parts is smaller than the one of the pilot parts.

6. Method for operating a cellular communication system according to claim 4, characterized in,

that the frequency reuse factor of the data parts is 3 and the one of the pilot parts is 9.