Inserting method of downlink common pilot
First Claim
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1. A method for inserting a downlink common pilot, which is adaptable to the OFDMA TDD system and comprises steps of:
- A;
dividing data to be transmitted into several segments to be transmitted in several continuous time periods, each time period comprising several slots with at least one downlink slot; and
B;
inserting a common pilot in one downlink slot in the time period;
wherein the time period comprises slots in one or more frame;
wherein when TDD system adopts a same frame structure with TD-SCDMA system and when in each sub-frame of the TD-SCDMA system, normal slots TS0, TS2, TS3, TS5, and TS6 are downlink slots and TS1 and TS4 are uplink slots, TS5 and TS6 in each sub-frame and TS0, DwPTS, GP, UpPTS, and TS1 in a subsequent sub-frame are allocated into a time period a and TS2, TS3, TS4 are allocated into a time period b, a downlink common pilot is inserted into one of the TS0 and DwPTS in the time period a and a downlink common pilot is inserted into the TS3 in the time period b;
wherein when TDD system adopts a same frame structure with TD-SCDMA system and when in each sub-frame of the OFDMA TDD system, normal slots TS0, TS2, TS4 and TS6 are downlink slots and TS1, TS3 and TS5 are uplink slots, TS6 in each sub-frame and TS0, DwPTS, GP, UpPTS and TS1 in a subsequent sub-frame are allocated into a time period c, TS2 and TS3 are allocated into a time period d, and TS4 and TS5 are allocated into a time period e, a downlink common pilot is inserted into one of the TS0 and DwPTS in the time period c, a downlink common pilot is inserted into the TS2 in the time period d and a downlink common pilot is inserted into the TS4 in the time period e.
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Abstract
The present invention discloses a method for inserting a downlink common pilot in a TDD system and more particularly to a method for inserting a downlink common pilot in a TDD system based on OFDMA technology and the method includes two steps. A: data to be transmitted are divided into several segments to be transmitted in several continuous time periods, wherein each time period includes several slots with at least one downlink slot; B: a common pilot is inserted in one downlink slot in the time period. Therefore, the scheduling based on the frequency domain can be achieved by measuring the common pilot channel.
21 Citations
5 Claims
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1. A method for inserting a downlink common pilot, which is adaptable to the OFDMA TDD system and comprises steps of:
-
A;
dividing data to be transmitted into several segments to be transmitted in several continuous time periods, each time period comprising several slots with at least one downlink slot; andB;
inserting a common pilot in one downlink slot in the time period;wherein the time period comprises slots in one or more frame; wherein when TDD system adopts a same frame structure with TD-SCDMA system and when in each sub-frame of the TD-SCDMA system, normal slots TS0, TS2, TS3, TS5, and TS6 are downlink slots and TS1 and TS4 are uplink slots, TS5 and TS6 in each sub-frame and TS0, DwPTS, GP, UpPTS, and TS1 in a subsequent sub-frame are allocated into a time period a and TS2, TS3, TS4 are allocated into a time period b, a downlink common pilot is inserted into one of the TS0 and DwPTS in the time period a and a downlink common pilot is inserted into the TS3 in the time period b; wherein when TDD system adopts a same frame structure with TD-SCDMA system and when in each sub-frame of the OFDMA TDD system, normal slots TS0, TS2, TS4 and TS6 are downlink slots and TS1, TS3 and TS5 are uplink slots, TS6 in each sub-frame and TS0, DwPTS, GP, UpPTS and TS1 in a subsequent sub-frame are allocated into a time period c, TS2 and TS3 are allocated into a time period d, and TS4 and TS5 are allocated into a time period e, a downlink common pilot is inserted into one of the TS0 and DwPTS in the time period c, a downlink common pilot is inserted into the TS2 in the time period d and a downlink common pilot is inserted into the TS4 in the time period e. - View Dependent Claims (2, 3, 4, 5)
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Specification