Method and device for configuring inter-cell time division duplex modes based on a TDD system

• US 8,605,676 B2
• Filed: 02/18/2009
• Issued: 12/10/2013
• Est. Priority Date: 02/18/2008
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Xin, Yu
• Primary Examiner(s): MILLS, DONALD L
• Application Number:
  US12/918,059
• Publication Number:
  US 20110032852A1
• Time in Patent Office: 1,756 Days
• Field of Search: None
• US Class Current: 370/330
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04W 16/12 Fixed resource partitioning

Abstract

The present invention disclose a method and a device for configuring inter-cell time division duplex modes based on a time division duplex system, wherein the method comprises: one or more physical frame pairs which are overlapped in the time domain and have different transmitting modes existing in physical frames of two adjacent cells; for each physical frame pair, setting one or two physical frames of the physical frame pair respectively not to transmit signals. With the technical schemes of the present invention, by means of making part or all of the physical frames overlapped in the time domain not to transmit signals, the uplink/downlink signal interference occurred when the ratios of the numbers of uplink/downlink physical frames between adjacent cells in the same frequency band is different may be avoided.

Claims

1. A method for configuring inter-cell time division duplex modes based on a time division duplex system, comprising:

one or more physical frame pairs, which are configured to be transmitted in overlapped transmission periods in the time domain and have different transmitting modes, existing in physical frames of two adjacent cells;

for each physical frame pair, setting only one physical frames of the physical frame pair not to transmit signals;

in all the physical frame pairs, setting all uplink physical frames at a same location not to transmit signals, or setting all downlink physical frames at a same location not to transmit signals;

wherein in the situation of setting an uplink physical frame not to transmit signals in an uplink transmission block, the same settings are performed to the uplink physical frames at the same location in other uplink transmission blocks;

in the situation of setting a downlink physical frame not to transmit signals in a downlink transmission block, the same settings are performed to the downlink physical frames at the same location in other downlink transmission blocks.

2. The method according to claim 1, wherein the two adjacent cells are a cell using a TDD 5:

3 mode and a cell using a TDD 4;

4 mode;

the fifth downlink physical frames of all the downlink transmission blocks of the cell using the TDD 5;

3 mode are set not to transmit signals;

or the first uplink physical frames of all the uplink transmission blocks of the cell using the TDD 4;

4 mode are set not to transmit signals.

3. The method according to claim 1, wherein the two adjacent cells are a cell using a TDD 3:

5 mode and a cell using a TDD 4;

4 mode;

the first uplink physical frames of all the uplink transmission blocks of the cell using the TDD 3;

5 mode are set not to transmit signals;

or the fourth downlink physical frames of all the downlink transmission blocks of the cell using the TDD 4;

4 mode are set not to transmit signals.

4. The method according to claim 1, wherein the two adjacent cells are a cell using a TDD 6:

2 mode and a cell using a TDD 4;

4 mode;

the sixth downlink physical frames of all the downlink transmission blocks of the cell using the TDD 6;

2 mode and the first uplink physical frames of all the uplink transmission blocks of the cell using the TDD 4;

4 mode are set not to transmit signals.

5. The method according to claim 1, wherein the two adjacent cells are a cell using a TDD 5:

3 mode and a cell using a TDD 3;

5 mode;

the fifth downlink physical frames of all the downlink transmission blocks of the cell using the TDD 5;

3 mode and the first uplink physical frames of all the uplink transmission blocks of the cell using the TDD 3;

5 mode are set not to transmit signals.

6. The method according to claim 1, wherein the two adjacent cells are a cell using a TDD 5:

3 mode and a cell using a TDD 6;

2 mode;

the first uplink physical frames of all the uplink transmission blocks of the cell using the TDD 5;

3 mode or the sixth downlink physical frames of all the downlink transmission blocks of the cell with TDD 6;

2 mode are set not to transmit signals.

7. The method according to claim 1, wherein the two adjacent cells are a cell using a TDD 6:

2 mode and a cell using a TDD 3;

5 mode;

the sixth downlink physical frames of all the downlink transmission blocks of the cell using the TDD 6;

2 mode and the first and the second uplink physical frames of all the uplink transmission blocks of the cell using the TDD 3;

5 mode are set not to transmit signals.

8. The method according to claim 1, wherein when areas using different time division duplex modes are adjacent, one or more cells of the time division duplex mode with physical frames which do not transmit signals is used to divide the areas using different time division duplex modes.

9. The method according to claim 1, wherein the lengths of the superframes in which physical frames of the two adjacent cells reside are identical or different;

in the situation that the lengths of the superframes in which the physical frames of the two adjacent cells reside are identical, the physical frame pair is determined by aligning the head and the tail of the superframes of the two adjacent cells in the time domain.

10. The method according to claim 1, wherein the head and the tail of the superframes in which physical frames of the two adjacent cells reside are aligned or not aligned.

11. A method for configuring inter-cell time division duplex modes based on a time division duplex system, which is used to eliminate the uplink/downlink signal interference between more than two adjacent cells with different ratios of the numbers of uplink/downlink physical frames in the same frequency band, comprising:

one or more physical frame groups, which are configured to be transmitted in overlapped transmission periods in the time domain and have different transmitting modes, existing in the physical frames of the more than two adjacent cells;

for each physical frame group, setting all the uplink physical frames or all the downlink physical frames in the physical frame group respectively not to transmit signals;

in all the physical frame groups, setting all the uplink physical frames in the physical frame groups at a same location not to transmit signals, or setting all the downlink physical frames in the physical frame groups at a same location not to transmit signals;

wherein in the situation of setting an uplink physical frame not to transmit signals in an uplink transmission block, the same settings are performed to the uplink physical frames at the same location in other uplink transmission blocks;

in the situation of setting a downlink physical frame not to transmit signals in a downlink transmission block, the same settings are performed to the downlink physical frames at the same location in other downlink transmission blocks.

12. The method according to claim 11, wherein the lengths of the superframes in which the physical frames of the more than two adjacent cells reside are identical or different;

in the situation that the lengths of the superframes in which the physical frames of the more than two adjacent cells reside are identical, the physical frame group is determined by aligning the heads and the tails of the superframes of various adjacent cells in the time domain.

13. A method for configuring inter-cell time division duplex modes based on a time division duplex system, which is used to eliminate the uplink/downlink signal interference between multiple adjacent cells, of which the head and tail of the superframes in the same frequency band are not aligned, comprising:

one or more physical frame groups, which are configured to be transmitted in overlapped transmission periods in the time domain and have different transmitting modes, existing in the physical frames of the multiple adjacent cells;

for each physical frame group, setting all the uplink physical frames or all the downlink physical frames in the physical frame group respectively not to transmit signals;

in all the physical frame groups, setting all the uplink physical frames in the physical frame groups at a same location not to transmit signals, or setting all the downlink physical frames in the physical frame groups at a same location not to transmit signals;

wherein in the situation of setting an uplink physical frame not to transmit signals in an uplink transmission block, the same settings are performed to the uplink physical frames at the same location in other uplink transmission blocks;

in the situation of setting a downlink physical frame not to transmit signals in a downlink transmission block, the same settings are performed to the downlink physical frames at the same location in other downlink transmission blocks.

14. The method according to claim 13, wherein the ratios of the numbers of the uplink/downlink physical frames between the multiple adjacent cells are identical, or the ratios of the numbers of the uplink/downlink physical frames between the multiple adjacent cells are different.

15. A device for configuring inter-cell time division duplex modes based on a time division duplex system, which is used to eliminate the uplink/downlink signal interference between multiple adjacent cells in the same frequency band, comprising:

a determining module, configured to determine that one or more physical frame groups, which are configured to be transmitted in overlapped transmission periods in the time domain and have different transmitting modes, exist in physical frames of the multiple adjacent cells;

a setting module, configured to set, in all the physical frame groups, all the uplink physical frames in the physical frame groups at a same location not to transmit signals or all the downlink physical frames in the physical frame groups at a same location not to transmit signals;

wherein in the situation of setting an uplink physical frame not to transmit signals in an uplink transmission block, the same settings are performed to the uplink physical frames at the same location in other uplink transmission blocks;

in the situation of setting a downlink physical frame not to transmit signals in a downlink transmission block, the same settings are performed to the downlink physical frames at the same location in other downlink transmission blocks.