Systems and methods for transmitting a transmission time interval signal with staggered reference signals

• US 7,912,092 B2
• Filed: 12/27/2006
• Issued: 03/22/2011
• Est. Priority Date: 12/27/2006
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Laboratories of America Incorporated (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Kowalski, John M.
• Primary Examiner(s): Trost, IV, William
• Assistant Examiner(s): Liu, Siming
• Application Number:
  US11/616,651
• Publication Number:
  US 20080159250A1
• Time in Patent Office: 1,546 Days
• Field of Search: 370/464, 370/498, 370/535, 370/480, 370/491
• US Class Current: 370/491
• CPC Class Codes: H04B 2201/70701 featuring pilot assisted reception
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04J 13/18 Allocation of orthogonal codes
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver

Abstract

A method for transmitting a transmission time interval signal in a cellular network is described. A multiplexed data signal is received. A demultiplexer is applied to the data signal. The data signal from the demultiplexer is encoded. A linear transform is applied to the data signal. A plurality of uplink transmission time interval signals, which include the data signal, are reformatted. The placement of one or more reference signals are staggered within each of the plurality of transmission time interval signals. Each of the plurality of uplink transmission time interval signals are transmitted.

Claims

1. A method for transmitting a transmission time interval signal in a cellular network, the method comprising:

receiving a multiplexed data signal;

applying a demultiplexer to the data signal;

encoding the data signal from the demultiplexer;

applying a linear transform to the data signal;

reformatting a plurality of uplink transmission time interval signals which include the data signal;

receiving an indicator comprising a first number of bits or a second number of bits depending on whether granularity of resource block assignment durations is greater than a first time period;

staggering a timing position of a pair of reference signals within each of the plurality of transmission time interval signals, wherein the pair of reference signals are received with multiple access interference related to data, and wherein the timing position is based on the indicator; and

transmitting each of the plurality of uplink transmission time interval signals.

2. The method of claim 1, further comprising reformatting timing parameters within adjacent cells of one of the plurality of transmission time interval signals.

3. The method of claim 1, wherein the pair of reference signals are transmitted simultaneously with one or more data signals.

4. The method of claim 1, wherein each of the pair of reference signals is transmitted during different time periods.

5. The method of claim 1, wherein each of the plurality of transmission time interval signals comprises fourteen long blocks.

6. The method of claim 5, wherein each of the fourteen long blocks comprises a length of 66.67 microseconds (μ

s).

7. The method of claim 5, wherein each of the fourteen long blocks comprises a cyclic prefix.

8. The method of claim 1, wherein each of the plurality of transmission time interval signals comprises a length of one millisecond (ms).

9. An apparatus that is configured to transmit a transmission time interval signal in a cellular network, the computer system comprising:

a processor;

memory in electronic communication with the processor;

instructions stored in the memory, the instructions being executable to;

receive a multiplexed data signal;

apply a demultiplexer to the data signal;

encode the data signal from the demultiplexer;

apply a linear transform to the data signal;

reformat a plurality of uplink transmission time interval signals which include the data signal;

receive an indicator comprising a first number of bits or a second number of bits depending on whether granularity of resource block assignment durations is greater than a first time period;

stagger a timing position of a pair of reference signals within each of the plurality of transmission time interval signals, wherein the pair reference signals are received with multiple access interference related to data, and wherein the timing position is based on the indicator; and

transmit each of the plurality of uplink transmission time interval signals.

10. The apparatus of claim 9, wherein the instructions are further executable to reformat timing parameters within adjacent cells of one of the plurality of transmission time interval signals.

11. The apparatus of claim 9, wherein the pair of reference signals are transmitted simultaneously with one or more data signals.

12. The apparatus of claim 9, wherein each of the pair of reference signals is transmitted during different time periods.

13. The apparatus of claim 9, wherein each of the plurality of transmission time interval signals comprises fourteen long blocks.

14. The apparatus of claim 13, wherein each of the fourteen long blocks comprises a length of 66.67 microseconds (μ

s).

15. The apparatus of claim 13, wherein each of the fourteen long blocks comprises a cyclic prefix.

16. The apparatus of claim 9, wherein each of the plurality of transmission time interval signals comprises a length of one millisecond (ms).

17. A method for allocating positions for a reference signal within a transmission time interval in a cellular network, the method comprising:

analyzing granularity of resource block assignment durations;

determining if the granularity of resource block assignment durations is greater than a first time period;

transmitting, via a transmitter, an indicator comprising a first number of bits or a second number of bits depending on the determination; and

receiving a transmission time interval signal in which a timing position of one or more reference signals within the transmission time interval signal is based on the indicator.

18. The method of claim 17, further comprising determining if the granularity of the resource block assignment durations is greater than one millisecond.