Method and apparatus of sending synchronization signals in TDD systems

• US 8,520,660 B2
• Filed: 11/06/2008
• Issued: 08/27/2013
• Est. Priority Date: 01/25/2008
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Liang, Chunli, Dai, Bo, Xia, Shuqiang, Hao, Peng
• Primary Examiner(s): Duong, Frank
• Application Number:
  US12/811,706
• Publication Number:
  US 20100278081A1
• Time in Patent Office: 1,755 Days
• Field of Search: 370328-339, 370/350, 370503-510
• US Class Current: 370/350
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 27/2655 Synchronisation arrangements
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/1469 using time-sharing

Abstract

The present invention discloses a method and apparatus of sending synchronization signals in TDD systems. The method includes: sending P-SCH signals of synchronization signals on the third symbol of a DwPTS; sending S-SCH signals of the synchronization signals on the last OFDM symbols of time slot 1 and time slot 11. The present invention solves the problem that the P-SCH signal sending interferes with the pilot sending of the first and second antenna in the prior art, guarantees that the location of the pilot in the DwPTS does not change, and reduces the system complexity.

Claims

1. A method of sending synchronization signals in TDD systems, comprising:

sending primary-synchronization (P-SCH) signals of synchronization signals on the third symbol of a downlink pilot time slot (DwPTS);

sending secondary-synchronization (S-SCH) signals of the synchronization signals on the last OFDM symbols of time slot 1 and time slot 11; and

wherein, communicating the P-SCH signals and the S-SCH signals by means of the TDD systems according to the sending.

2. A method of sending synchronization signals in TDD systems, comprising:

sending P-SCH signals of synchronization signals on the last OFDM symbols of time slot 1 and time slot 11;

sending S-SCH signals of the synchronization signals on the third symbol of a DwPTS; and

wherein, communicating the P-SCH signals and the S-SCH signals by means of the TDD systems according to the sending.

3. An apparatus of sending synchronization signals in TDD systems, comprising:

a P-SCH signal module in an integrated circuit, which is used to send P-SCH signals of synchronization signals on the third symbol of a DwPTS; and

an S-SCH signal module in an integrated circuit, which is used to send S-SCH signals of the synchronization signals on the last OFDM symbols of time slot 1 and time slot 11.

4. An apparatus of sending synchronization signals in TDD systems, comprising:

a P-SCH signal module in an integrated circuit, which is used to send P-SCH signals of synchronization signals on the last OFDM symbols of time slot 1 and time slot 11; and

an S-SCH signal module in an integrated circuit, which is used to send S-SCH signals of the synchronization signals on the third symbol of a DwPTS.