System and Method for Increasing Low Density Signature Space

• US 20170214509A1
• Filed: 04/07/2017
• Published: 07/27/2017
• Est. Priority Date: 09/09/2013
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Yi, Zhihang, Bayesteh, Alireza, Ma, Jianglei, Nikopour, Hosein
• Granted Patent: US 10,700,838 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 5/0042 intra-user or intra-terminal allocation
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04W 72/00 Local resource management
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

Embodiments are provided herein for increasing low density signature space for multiplexed transmissions for a plurality of users. The embodiments include generating a virtual signature using a combination operation on a plurality of basic signatures. The generated virtual signatures are provisioned as basic resource units (BRUs) for transmissions for corresponding users. The combination operation is a row-wise or column-wise permutation for combining, in each of the virtual signatures, rows or columns of corresponding basic signatures. The rows or columns represent sequences of frequency bands at one time interval or sequences of allocated time intervals at one frequency band. Alternatively, the combination operation is intra-basic resource unit (BRU) hopping. The embodiments also include generating a plurality of BRU sets comprised of virtual signatures. Each of the BRU sets is provisioned for a corresponding user.

Claims

1. A method comprising:

determining, by a user equipment, a virtual signature, the virtual signature comprising a plurality of different basic signatures, a virtual signature space of the virtual signature being larger than a basic signature space of the basic signatures; and

transmitting, by the user equipment, information spread with the virtual signature over assigned channel resources.

2. The method of claim 1, wherein the basic signatures are low density signatures.

3. The method of claim 1, wherein the information is a pilot signal, and wherein the pilot signal and the virtual signature have a one-to-one mapping.

4. The method of claim 1, wherein the virtual signature is a combination of the plurality of the basic signatures.

5. The method of claim 4, wherein the combination is a row-wise combination of rows of corresponding basic signatures in the assigned channel resources, wherein each of the rows includes a same respective basic signature, and wherein the rows represent sequences of frequency bands at one time interval or sequences of allocated time intervals at one frequency band.

6. The method of claim 4, wherein the combination is a column-wise combination of columns of corresponding basic signatures in the assigned channel resources, wherein each of the columns includes a same respective basic signature, and wherein the columns represent sequences of frequency bands at one time interval or sequences of allocated time intervals at one frequency band.

7. The method of claim 4, wherein the assigned channel resources are a basic resource unit (BRU), and wherein the combination is an intra-BRU hopping sequence of the basic signatures, and wherein the virtual signature includes rows, columns, or both rows and columns each including a sequence of the basic signatures.

8. The method of claim 1, wherein the virtual signature has a same number of the basic signatures as other virtual signatures used by other user equipments, and wherein a total number of the virtual signatures is equal to a total number of the basic signatures raised to a power of the same number of the basic signatures.

9. The method of claim 1, wherein the assigned channel resources are a basic resource unit (BRU), and wherein the method further comprises:

determining, by the user equipment, a virtual signature set for a BRU set, the virtual signature set comprising a combination of virtual signatures including the virtual signature, and the BRU set comprising a combination of BRUs including the BRU; and

transmitting, by the user equipment, information spread with the virtual signature set over the BRU set.

10. The method of claim 9, wherein the BRU set has a same number of the BRUs as other BRU sets used by other user equipments, and wherein a total number of the BRU sets is equal to all possible combinations of the BRUs in the BRU set.

11. The method of claim 9, wherein the virtual signature set is a combination of the plurality of the basic signatures, and wherein the combination is an inter-BRU hopping sequence of the basic signatures in the BRU set, and wherein the virtual signature includes rows, columns, or both rows and columns each including a sequence of the basic signatures.

12. The method of claim 1, the determining further comprising receiving the virtual signature from a network component.

13. A user equipment comprising:

a non-transitory memory storage comprising instructions; and

one or more processors in communication with the memory storage, wherein the one or more processors execute the instructions for;

determining a virtual signature, the virtual signature comprising a plurality of different basic signatures, a virtual signature space of the virtual signature being larger than a basic signature space of the basic signatures; and

transmitting information spread with the virtual signature over assigned channel resources.

14. The user equipment of claim 13, wherein the basic signatures are low density signatures.

15. The user equipment of claim 13, wherein the information is a pilot signal, and wherein the pilot signal and the virtual signature have a one-to-one mapping.

16. The user equipment of claim 13, wherein the virtual signature is a combination of the plurality of the basic signatures.

17. The user equipment of claim 16, wherein the combination is a row-wise combination of rows of corresponding basic signatures in the assigned channel resources, wherein each of the rows includes a same respective basic signature, and wherein the rows represent sequences of frequency bands at one time interval or sequences of allocated time intervals at one frequency band.

18. The user equipment of claim 16, wherein the combination is a column-wise combination of columns of corresponding basic signatures in the assigned channel resources, wherein each of the columns includes a same respective basic signature, and wherein the columns represent sequences of frequency bands at one time interval or sequences of allocated time intervals at one frequency band.

19. The user equipment of claim 16, wherein the assigned channel resources are a basic resource unit (BRU), and wherein the combination is an intra-BRU hopping sequence of the basic signatures, and wherein the virtual signature includes rows, columns, or both rows and columns each including a sequence of the basic signatures.

20. The user equipment of claim 13, wherein the virtual signature has a same number of the basic signatures as other virtual signatures used by other user equipments, and wherein a total number of the virtual signatures is equal to a total number of the basic signatures raised to a power of the same number of the basic signatures.

21. The user equipment of claim 13, wherein the assigned channel resources are a basic resource unit (BRU), and wherein the one or more processors further execute the instructions for:

determining a virtual signature set for a BRU set, the virtual signature set comprising a combination of virtual signatures including the virtual signature, and the BRU set comprising a combination of BRUs including the BRU; and

transmitting information spread with the virtual signature set over the BRU set.

22. The user equipment of claim 21, wherein the BRU set has a same number of the BRUs as other BRU sets used by other user equipments, and wherein a total number of the BRU sets is equal to all possible combinations of the BRUs in the BRU set.

23. The user equipment of claim 21, wherein the virtual signature set is a combination of the plurality of the basic signatures, and wherein the combination is an inter-BRU hopping sequence of the basic signatures in the BRU set, and wherein the virtual signature includes rows, columns, or both rows and columns each including a sequence of the basic signatures.

24. The user equipment of claim 13, wherein the determining comprises receiving the virtual signature from a network component.