Method and system for scheduling interference aware optimal uplink for device to-device communication underlying LTE networks

Patent metadata

Field	Value
Publication number	US-9974094-B2
Application number	US-201514934831-A
Country	US
Kind code	B2
Filing date	Nov 6, 2015
Priority date	Nov 6, 2014
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

A method and system is provided for scheduling interference aware optimal uplink for device-to-device communication underlying LTE networks. The present application provides a method and system for scheduling interference aware optimal uplink for device-to-device communication underlying LTE networks, comprises registering a plurality of users equipment (UEs) with a single cell with one Evolved Node B (eNB) over the Long Term Evolution (LTE) network; initiating connection by the plurality of users equipment (UEs) with Evolved Node B (eNB); discovering device-to-device (D2D) communication between the actively connected plurality of users equipment (UEs); segregating the actively connected plurality of users equipment (UEs) in device-to-device and cellular users by the Evolved Node B (eNB); and scheduling the two-phase interference aware optimal uplink for device-to-device communication for segregated actively connected device-to-device (D2d) and cellular users by the Evolved Node B (eNB), underlying the Long Term Evolution (LTE) network.

First claim

We claim:

1. A method for an interference aware optimal device-to-device (D2D) communication and uplink scheduling underlying a Long Term Evolution (LTE) network, said method comprising:
registering a plurality of users equipment (UEs) with a single cell with one Evolved Node B (eNB) over the Long Term Evolution (LTE) network wherein each of the plurality of users equipment (UEs) is capable of transmitting at least one data packet of multiple flows through the Evolved Node B (eNB);
initiating connection by the plurality of users equipment (UEs) with the Evolved Node B (eNB) by starting random access procedure;
discovering device-to-device (D2D) communication between actively connected plurality of users equipment (UEs) by collecting location and channel information of the actively connected plurality of users equipment (UEs) by the Evolved Node B (eNB) through SRS packets;
segregating and classifying the actively connected plurality of users equipment (UEs) in device-to-device and cellular users by the Evolved Node B (eNB) by utilizing collected location and channel information of the actively connected plurality of users equipment (UEs); and
scheduling two-phase interference aware optimal uplink for the device-to-device communication for the actively connected device-to-device (D2d) users and cellular users segregated out of the plurality of users equipment (UEs) by the Evolved Node B (eNB), underlying the Long Term Evolution (LTE) network, wherein scheduling the two-phase interference aware optimal uplink for the device-to-device communication further comprises:
scheduling cellular users for plurality of Resource Blocks (RBs) set in a Long Term Evolution (LTE) frame, and
scheduling valid and non-interfering device-to-device (D2D) users along with the already scheduled cellular users for the plurality of Resource Blocks (RBs) with no or minimal total interference, wherein interference by an uplink cellular user at a device-to-device (D2D) receiver and interference at the Evolved Node B (eNB) by a device-to-device (D2D) transmitter are below maximum Signal-to-Interference and Noise Ratio (SINRlb).

2. The method as claimed in claim 1 , wherein the plurality of users equipment (UEs) is selected from a group comprising of static or mobile user equipment.

3. The method as claimed in claim 1 , wherein mode of communications between the actively connected plurality of users equipment (UEs) is selected from a group comprising directly with each other and through the Evolved Node B (eNB).

4. The method as claimed in claim 1 , further comprises of collecting one or more request messages from the plurality of users equipment (UEs) by the Evolved Node B (eNB).

5. The method as claimed in claim 1 , wherein the one or more request messages from the plurality of users equipment (UEs) are collected by the Evolved Node B (eNB) using contention based techniques.

6. The method as claimed in claim 1 , wherein the scheduling the two-phase interference aware optimal uplink for device-to-device communication underlying the Long Term Evolution (LTE) network is enabled by a Long Term Evolution (LTE) uplink Frequency Division Duplexing (FDD) frame structure.

7. The method as claimed in claim 6 , wherein the Long Term Evolution (LTE) uplink Frequency Division Duplexing (FDD) frame structure further comprises of dividing a frame length in to a plurality of sub-frames; dividing the plurality of sub-frames into at least two slots; and dividing available system bandwidth into a plurality of Resource Blocks (RBs) corresponds to at least one slot.

8. The method as claimed in claim 1 , wherein a wireless channel between the plurality of users equipment (UEs) and the Evolved Node B (eNB) is frequency selective and time varying in nature and is modeled through Log-normal shadowing and Rayleigh fading.

9. The method as claimed in claim 1 , wherein the plurality of users equipment (UEs) reports uplink channel condition using a Sounding Reference Signal (SRS).

10. The method as claimed in claim 1 , further comprises of assigning adaptive modulation and coding rates to each of the plurality of users equipment (UEs) by the Evolved Node B (eNB) based on a signal-to-interference-plus-noise ratio (SINR) received at the Evolved Node B (eNB).

11. The method as claimed in claim 1 , further comprises of facilitating device-to-device (D2D) communications under 3rd Generation Partnership Project (3GPP).

12. A system for scheduling an interference aware optimal uplink for device-to-device (D2D) communication underlying a Long Term Evolution (LTE) network, said system comprising a single cell with one Evolved Node B (eNB) communicatively coupled to a plurality of users equipment (UEs) over the Long Term Evolution (LTE) network adapted for executing:
registering a plurality of users equipment (UEs) with the single cell with one Evolved Node B (eNB) over the Long Term Evolution (LTE) network wherein each of the plurality of users equipment (UEs) is capable of transmitting at least one data packet of multiple flows through the Evolved Node B (eNB);
initiating connection by the plurality of users equipment (UEs) with the Evolved Node B (eNB) by starting random access procedure;
discovering device-to-device (D2D) communication between actively connected plurality of users equipment (UEs) by collecting location and channel information of the actively connected plurality of users equipment (UEs) by the Evolved Node B (eNB) through SRS packets;
segregating the actively connected plurality of users equipment (UEs) in device-to-device and cellular users by the Evolved Node B (eNB) by utilizing collected location and channel information of the actively connected plurality of users equipment (UEs); and
scheduling two-phase interference aware optimal uplink for device-to-device communication for the actively connected device-to-device (D2d) users and cellular users segregated out of the plurality of users equipment (UEs) by the Evolved Node B (eNB), underlying the Long Term Evolution (LTE) network, wherein scheduling the two-phase interference aware optimal uplink for device-to-device communication further comprises scheduling cellular users for the plurality of Resource Blocks (RBs) set in the Long Term Evolution (LTE) frame, and scheduling valid and non-interfering device-to-device (D2D) users along with the already scheduled cellular users for the plurality of Resource Blocks (RBs) with no or minimal total interference, wherein interference by an uplink cellular user at a device-to-device (D2D) receiver and interference at the Evolved Node B (eNB) by a device-to-device (D2D) transmitter are below maximum Signal-to-Interference and Noise Ratio (SINRlb).

13. The system as claimed in claim 12 , wherein the plurality of users equipment are registered to the Evolved Node B (eNB).

14. The system as claimed in claim 12 , wherein the plurality of users equipment (UEs) is selected from a group comprising of static or mobile user equipment.

15. The system as claimed in claim 12 , wherein mode of communications between the actively connected plurality of users equipment (UEs) is selected from a group comprising directly with each other and through the Evolved Node B (eNB).

16. The system as claimed in claim 12 , wherein the scheduling the two-phase interference aware optimal uplink for device-to-device communication underlying the Long Term Evolution (LTE) network is enabled by a Long Term Evolution (LTE) uplink Frequency Division Duplexing (FDD) frame structure.

17. The system as claimed in claim 16 , wherein the Long Term Evolution (LTE) uplink Fre

Assignees

• Tata Consultancy Services Ltd

Inventors

• Panigrahi Bighnaraj
• Rath Hemant Kumar
• Simha Anantha

Classifications

• H04W76/023

  Electricity · mapped topic

• H04W72/1268 Primary

  of uplink data flows · CPC title

• H04W74/0833

  Random access procedures, e.g. with 4-step access · CPC title

• H04W4/005

  Electricity · mapped topic

• H04W72/121 Primary

  for groups of terminals or users · CPC title