Device-to-device (D2D) scheduling control in orthogonal frequency division multiplexing (OFDM) wireless system

• US 10,091,784 B1
• Filed: 12/31/2016
• Issued: 10/02/2018
• Est. Priority Date: 12/31/2016
• Status: Active Grant

• Current Assignee: T-Mobile Innovations LLC (Deutsche Telekom AG)
• Original Assignee: Sprint Communications Company LP (Deutsche Telekom AG)
• Inventors: Liu, Chunmei, Sitaram, Krishna D., Pawar, Hemanth Balaji, Kothari, Pratik
• Primary Examiner(s): Lam, Yee
• Application Number:
  US15/396,456
• Time in Patent Office: 640 Days
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04J 11/0023 Interference mitigation or co-ordination direct sequence spread spectrum [DSSS] systems H04B1/7097; frequency hopping H04B1/713; allocation criteria for ingress interference avoidance H04L5/0062; frequency allocation criteria for requirements on out-of-channel emissions H04L5/0066; arrangements for removing intersymbol interference or baseband equalisers H04L25/03006; peak power aspects in multicarrier modulation H04L27/2614; power management H04W52/00; traffic scheduling H04W72/54, H04W72/541
• CPC Class Codes: H04J 2011/0009 with FDM/FDMA
• CPC Class Codes: H04L 1/203 Details of error rate determination, e.g. BER, FER or WER
• CPC Class Codes: H04W 28/0257 the individual bearer or channel having a maximum bit rate or a bit rate guarantee
• CPC Class Codes: H04W 28/0268 using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] negotiating SLA or negotiating QoS H04W28/24
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

An Orthogonal Frequency Division Multiplexing (OFDM) communication network controls Device-to-Device (D2D) scheduling. The OFDM access point wirelessly exchanges wireless communications with a plurality of individual User Equipment (UEs) using scheduled UE resources in a shared resource range. The OFDM access point wirelessly receives a first D2D communication request for a first D2D UE and responsively schedules D2D resources for the first D2D communication request in the shared resource range. The OFDM access point detects D2D interference for one of the plurality of individual UEs and determines that the D2D interference exceeds a D2D interference threshold. The OFDM access point wirelessly receives a second D2D communication request for a second D2D UE and responsively schedules D2D resources for the second D2D communication request in a D2D dedicated resource sub-range.

Claims

1. A method of operating an Orthogonal Frequency Division Multiplexing (OFDM) communication network to control Device-to-Device (D2D) scheduling, the method comprising:

an OFDM access point wirelessly exchanging wireless communications with non-D2D User Equipment (UEs) using a shared group of adjacent OFDM resource blocks in individual OFDM time slots;

the OFDM access point wirelessly receiving a first D2D communication request for a first D2D UE and responsively scheduling the first D2D UE in the shared group of the adjacent OFDM resource blocks in the individual OFDM time slots;

the OFDM access point detecting D2D interference for one of the non-D2D UEs and determining that the D2D interference exceeds a D2D interference threshold;

the OFDM access point wirelessly receiving a second D2D communication request for a second D2D UE, and in response to the D2D interference exceeding the D2D interference threshold, scheduling the second D2D UE in a dedicated group of adjacent OFDM resource blocks in the individual OFDM time slots;

the OFDM access point determining that an amount of the adjacent OFDM resource blocks in the dedicated group exceeds a maximum dedicated threshold, in response to scheduling the second D2D UE in the dedicated group of the adjacent OFDM resource blocks in the individual OFDM time slots; and

the OFDM access point wirelessly receiving a third D2D communication request for a third D2D UE, and in response to the amount of the adjacent OFDM resource blocks in the dedicated group exceeding the maximum dedicated threshold, disabling D2D for the third D2D UE.

2. The method of claim 1 further comprising:

in response to scheduling the second D2D UE in the dedicated group of the adjacent OFDM resource blocks in the individual OFDM time slots, the OFDM access point detecting additional D2D interference for one of the non-D2D UEs and determining that the additional D2D interference does not exceed the D2D interference threshold; and

the OFDM access point wirelessly receiving a fourth D2D communication request for a fourth D2D UE, and in response to the additional D2D interference not exceeding the D2D interference threshold, scheduling the fourth D2D UE in the shared group of the adjacent OFDM resource blocks in the individual OFDM time slots.

3. The method of claim 1 wherein the D2D interference for the one of the non-D2D UEs comprises a Signal-to-Noise Ratio (SNR) for the one of the non-D2D UEs.

4. The method of claim 1 wherein the D2D interference for the one of the non-D2D UEs comprises a Hybrid Automatic Repeat Request (HARQ) rate for the one of the non-D2D UEs.

5. The method of claim 1 further comprising the OFDM access point wirelessly receiving a Guaranteed Bit Rate (GBR) communication request for one of the non-D2D UEs and responsively scheduling the one of the non-D2D UEs in the dedicated group of the adjacent OFDM resource blocks in the individual OFDM time slots.

6. The method of claim 1 further comprising the OFDM access point wirelessly receiving a Wireless Priority Service (WPS) communication request for one of the non-D2D UEs and responsively scheduling the one of the non-D2D UEs in the dedicated group of the adjacent OFDM resource blocks in the individual OFDM time slots.

7. The method of claim 1 wherein the OFDM access point comprises a Long Term Evolution (LTE) evolved NodeB (eNodeB).

8. An Orthogonal Frequency Division Multiplexing (OFDM) communication system to control Device-to-Device (D2D) scheduling, the OFDM communication system comprising:

an OFDM access point configured to wirelessly exchange wireless communications with non-D2D User Equipment (UEs) using a shared group of adjacent OFDM resource blocks in individual OFDM time slots;

the OFDM access point configured to wirelessly receive a first D2D communication request for a first D2D UE and responsively schedule the first D2D UE in the shared group of the adjacent OFDM resource blocks in the individual OFDM time slots;

the OFDM access point configured to detect D2D interference for one of the non-D2D UEs and determine that the D2D interference exceeds a D2D interference threshold;

the OFDM access point configured to wirelessly receive a second D2D communication request for a second D2D UE, and in response to the D2D interference exceeding the D2D interference threshold, schedule the second D2D UE in a dedicated group of adjacent OFDM resource blocks in the individual OFDM time slots;

the OFDM access point configured to determine that an amount of the adjacent OFDM resource blocks in the dedicated group exceeds a maximum dedicated threshold, in response to the OFDM access point configured to schedule the second D2D UE in the dedicated group of the adjacent OFDM resource blocks in the individual OFDM time slots; and

the OFDM access point configured to wirelessly receive a third D2D communication request for a third D2D UE, and in response to the amount of the adjacent OFDM resource blocks in the dedicated group exceeding the maximum dedicated threshold, disable D2D for the third D2D UE.

9. The OFDM communication system of claim 8 further comprising:

in response to the OFDM access point configured to schedule the second D2D UE in the dedicated group of the adjacent OFDM resource blocks in the individual OFDM time slots, the OFDM access point configured to detect additional D2D interference for one of the non-D2D UEs and determine that the additional D2D interference does not exceed the D2D interference threshold; and

the OFDM access point configured to wirelessly receive a fourth D2D communication request for a third D2D UE, and in response to the additional D2D interference not exceeding the D2D interference threshold, schedule the fourth D2D UE in the shared group of the adjacent OFDM resource blocks in the individual OFDM time slots.

10. The OFDM communication system of claim 8 wherein the D2D interference for the non-D2D UEs comprises a Signal-to-Noise Ratio (SNR) for the one of the non-D2D UEs.

11. The OFDM communication system of claim 8 wherein the D2D interference for the non-D2D UEs comprises a Hybrid Automatic Repeat Request (HARQ) rate for the one of the non-D2D UEs.

12. The OFDM communication system of claim 8 further comprising, the OFDM access point configured to wirelessly receive a Guaranteed Bit Rate (GBR) communication request for one of the non-D2D UEs and responsively schedule the one of the non-D2D UEs in the dedicated group of the adjacent OFDM resource blocks in the individual OFDM time slots.

13. The OFDM communication system of claim 8 further comprising the OFDM access point configured to wirelessly receive Wireless Priority Service (WPS) communication request for one of the non-D2D UEs and responsively schedule the one of the non-D2D UEs in the dedicated group of the adjacent OFDM resource blocks in the individual OFDM time slots.

14. The OFDM communication system of claim 8 wherein the OFDM access point comprises a Long Term Evolution (LTE) evolved NodeB (eNodeB).