Techniques for formatting signals for transmission using a wireless network

• US 8,483,203 B2
• Filed: 12/07/2010
• Issued: 07/09/2013
• Est. Priority Date: 05/03/2010
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Zhu, Yuan, Li, Qinghua, Yang, Xiangying, Chen, Xiaogang
• Primary Examiner(s): Sheikh, Ayaz
• Assistant Examiner(s): ASEFA, DEBEBE A
• Application Number:
  US12/962,045
• Publication Number:
  US 20110268102A1
• Time in Patent Office: 945 Days
• Field of Search: 370254-340, 370/345
• US Class Current: 370/345
• CPC Class Codes: H04L 1/1614 using bitmaps
• CPC Class Codes: H04L 47/11 Identifying congestion
• CPC Class Codes: H04L 47/283 in response to processing delays, e.g. caused by jitter or round trip time [RTT]
• CPC Class Codes: H04L 47/30 in combination with information about buffer occupancy at either end or at transit nodes
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0016 Time-frequency-code
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 28/02 Traffic management, e.g. flow control or congestion control
• CPC Class Codes: H04W 28/12 using signalling between network elements
• CPC Class Codes: H04W 36/22 for handling the traffic
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/52 : based on load
• CPC Class Codes: H04W 76/27 : Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 8/04 : Registration at HLR or HSS [Home Subscriber Server]
• CPC Class Codes: Y02D 30/00 : Reducing energy consumption in communication networks
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

Techniques are described for forming signals for transmission to a receiver. Two transmitters can form resource blocks with different Physical Uplink Control Channel (PUCCH) demodulation reference signal (DMRS) patterns that are orthogonal over time and/or frequency to each other. The transmitters can simultaneously transmit the same resource block but with different DMRS patterns. If a receiver is mounted with two antennas, the receiver can utilize a MIMO receiver to differentiate resource blocks from two transmitters.

Claims

1. A computer-implemented method performed using a wireless mobile computing device, the method comprising:

requesting to form a signal, the signal comprising sub-carriers on at least two different frequencies wherein a first frequency of a first sub-carrier includes at least two different time slots and wherein a second frequency of a second sub-carrier includes at least two different time slots;

requesting assignment of a first data portion to one of the time slots of the first sub-carrier;

requesting assignment of a second data portion to another of the time slots of the first sub-carrier with a first frequency; and

requesting assignment of a demodulation reference signal (DMRS) pattern in each sub-carrier of the signal, the DMRS pattern in a resource block of the signal, the DMRS pattern orthogonal in frequency and time with respect to a DMRS pattern in a resource block of another signal from another device, the resource block of the signal to overlap in frequency and time with the resource block of the another signal.

2. The method of claim 1, wherein

the first data portion comprises a data symbol multiplied by a value that is orthogonal in the frequency domain and

the second data portion comprises a data symbol multiplied by a value that is orthogonal in the frequency domain.

3. The method of claim 1, wherein

the first data portion comprises a data symbol multiplied by a time domain orthogonal cover and

the second data portion comprises a data symbol multiplied by a time domain orthogonal cover.

4. The method of claim 1, wherein

the first data portion comprises a Discrete Fourier Transform precoded data symbol and

the second data portion comprises a second Discrete Fourier Transform precoded data symbol.

5. The method of claim 1, wherein the DMRS pattern comprises at least one frequency orthogonal code.

6. The method of claim 1, wherein the DMRS pattern comprises a plurality of frequency orthogonal codes that are not in adjacent time slots.

7. The method of claim 1, wherein the DMRS pattern comprises a product of time orthogonal and frequency orthogonal values and the DMRS pattern are allocated in adjacent time slots.

8. A computer-implemented method performed using a wireless computing device, the method comprising:

receiving first and second resource blocks from respective first and second user elements, the first and second resource blocks each including orthogonal demodulation reference signal (DMRS) patterns, the DMRS pattern of the first resource block to overlap in time and frequency domains with the DMRS pattern of the second resource block;

requesting estimation of the channels used for transmission of the first and second resource blocks; and

requesting determination of data values from the first and second resource blocks based in part on the estimation.

9. The method of claim 8, further comprising:

using multiple-input multiple-output communications (MIMO) techniques to separate the data portions for multiple user elements.

10. The method of claim 9, wherein the using MIMO techniques comprises using Minimum Mean Square Error (MMSE) or Maximum Likelihood Detection (MLD).

11. The method of claim 8, wherein the first and second resource blocks include data portions and each of the data portions comprise one of:

a data symbol multiplied by a value that is orthogonal in the frequency domain, a data symbol multiplied by a time domain orthogonal cover, and a Discrete Fourier Transform precoded data symbol.

12. The method of claim 8, wherein the DMRS patterns comprise one of:

frequency orthogonal codes, frequency orthogonal codes that are not in adjacent time slots, and a product of time orthogonal and frequency orthogonal values allocated in adjacent time slots.

13. A system comprising:

at least one antenna;

a radio communicatively coupled to the at least one antenna; and

a processor configured to;

request to form a signal, the signal comprising sub-carriers on at least two different frequencies wherein a first frequency of a first sub-carrier includes at least two different time slots and wherein a second frequency of a second sub-carrier includes at least two different time slots;

request assignment of a first data portion to one of the time slots of the first sub-carrier;

request assignment of a second data portion to another of the time slots of the first sub-carrier with a first frequency; and

request assignment of a demodulation reference signal (DMRS) pattern in each sub-carrier of the signal, the DMRS pattern to be in a resource block of the signal, the DMRS pattern to be orthogonal in frequency and time with respect to a DMRS pattern in a resource block of another signal from another device, the resource block of the signal to overlap in frequency and time with the resource block of the another signal.

14. The system of claim 13, wherein

the first data portion comprises a data symbol multiplied by a value that is orthogonal in the frequency domain and

the second data portion comprises a data symbol multiplied by a value that is orthogonal in the frequency domain.

15. The system of claim 13, wherein

the first data portion comprises a data symbol multiplied by a time domain orthogonal cover and

the second data portion comprises a data symbol multiplied by a time domain orthogonal cover.

16. The system of claim 13, wherein

the first data portion comprises a Discrete Fourier Transform precoded data symbol and

the second data portion comprises a second Discrete Fourier Transform precoded data symbol.

17. The system of claim 13, wherein

the DMRS pattern comprises at least one of:

at least one frequency orthogonal code, a plurality of frequency orthogonal codes that are not in adjacent time slots, or a product of time orthogonal and frequency orthogonal values and the DMRS pattern are allocated in adjacent time slots.

18. A system comprising:

at least two antennas;

a radio communicatively coupled to the at least two antenna; and

a processor configured to;

process first and second resource blocks, the first resource block associated with a first user element and the second resource block associated with a second user element, the first and second resource blocks each including orthogonal demodulation reference signal (DMRS) patterns, the DMRS pattern of the first resource block to overlap in time and frequency domains with the DMRS pattern of the second resource block,

request estimation of the channels used for transmission of the first and second resource blocks, and

request determination of data values from the first and second resource blocks based in part on the estimation.

19. The system of claim 18, further comprising:

a multiple-input multiple-output communications (MIMO) receiver to separate the data portions for multiple user elements, wherein the MIMO receiver uses Minimum Mean Square Error (MMSE) or Maximum Likelihood Detection (MLD).

20. The system of claim 18, wherein the first and second resource blocks include data portions and each of the data portions comprise one of:

a data symbol multiplied by a value that is orthogonal in the frequency domain, a data symbol multiplied by a time domain orthogonal cover, and a Discrete Fourier Transform precoded data symbol.

21. The method of claim 18, wherein the DMRS patterns comprise one of:

frequency orthogonal codes, frequency orthogonal codes that are not in adjacent time slots, and a product of time orthogonal and frequency orthogonal values allocated in adjacent time slots.