Coordination of Wi-Fi P2P and LTE data traffic
For LTE cellular data and Wi-Fi P2P technology coexistence scenario, a user equipment can generate in-device coexistence (IDC) indication message to the base station for DRX-based IDC solution. LTE data scheduling is described by a set of DRX parameters, while Wi-Fi P2P data scheduling is described by Opportunistic Power Saving (OppoPS) and Notification of Absence (NoA) parameters. When generating the IDC indication message for Wi-Fi P2P group client (GC), the DRX parameters must be selected carefully to maximize efficiency. Even though Wi-Fi shares less time, with proper time alignment, its coexistence performance could be better. For Wi-Fi P2P group owner (GO) with IDC TDM scheduling constraints, OppoPS and NoA should be aligned with DRX parameters to achieve best performance.
1. A method, comprising:
obtaining LTE discontinuous reception (DRX) parameters by a user equipment (UE) from an LTE base station in a wireless communication network, wherein the UE is a Wi-Fi group client (GC) equipped with an LTE radio transceiver and a co-located Wi-Fi radio transceiver;
obtaining Wi-Fi scheduling parameters by the UE from a Wi-Fi group owner (GO), wherein the Wi-Fi scheduling parameters comprise at least one of client traffic window information and absent time information of the GO;
determining desired DRX parameters based on the Wi-Fi scheduling parameters; and
transmitting an in-device coexistence (IDC) indicator containing the desired DRX parameters from the LTE radio transceiver to the base station.
2. The method of claim 1 , wherein the DRX parameters reflect LTE active time and LTE inactive time of the LTE radio transceiver, which correspond to GC inactive time and GC active time of the Wi-Fi transceiver.
3. The method of claim 2 , wherein the desired DRX parameters are determined to increase an effective Wi-Fi active time of the Wi-Fi transceiver.
4. The method of claim 2 , wherein an opportunistic power saving scheme is adopted by the GO, and wherein the Wi-Fi scheduling parameters comprise a beacon interval and a client traffic window duration.
5. The method of claim 4 , wherein the desired DRX parameters are determined such that the GC active time overlaps with the GO client traffic window duration.
6. The method of claim 2 , wherein a notification of absence scheme is adopted by the GO, and wherein the Wi-Fi scheduling parameters comprise a start time, an interval, a duration, and a count of GO absence.
7. The method of claim 6 , wherein the desired DRX parameters are determined such that the GC inactive time overlaps with the GO absent duration.
8. A user equipment (UE), comprising:
an LTE radio transceiver that obtains LTE discontinuous reception (DRX) parameters from an LTE base station in a wireless communication network;
a Wi-Fi radio transceiver that obtains Wi-Fi scheduling parameters from a Wi-Fi group owner (GO), wherein the UE is a Wi-Fi group client (GC) equipped with the LTE radio transceiver and the co-located Wi-Fi radio transceiver, and wherein the Wi-Fi scheduling parameters comprise at least one of client traffic window information and absent time information of the GO;
a control circuit that determines desired DRX parameters based on the Wi-Fi scheduling parameters; and
a transmitter that transmits an in-device coexistence (IDC) indicator containing the desired DRX parameters from the LTE radio transceiver to the base station.
9. The UE of claim 8 , wherein the DRX parameters reflect LTE active time and LTE inactive time of the LTE radio transceiver, which correspond to GC inactive time and GC active time of the Wi-Fi transceiver.
10. The UE of claim 9 , wherein the desired DRX parameters are determined to increase an effective Wi-Fi active time of the Wi-Fi transceiver.
11. The UE of claim 9 , wherein an opportunistic power saving scheme is adopted by the GO, and wherein the Wi-Fi scheduling parameters comprise a beacon interval and a client traffic window duration.
12. The UE of claim 11 , wherein the desired DRX parameters are determined such that the GC active time overlap with the GO client traffic window duration.
13. The UE of claim 9 , wherein a notification of absence scheme is adopted by the GO, and wherein the Wi-Fi scheduling parameters comprise a start time, an interval, a duration, and a count of GO absence.
14. The UE of claim 13 , wherein the desired DRX parameters are determined such that the GC inactive time overlap with the GO absent duration.
15. A method comprising:
obtaining LTE discontinuous reception (DRX) parameters by a user equipment (UE) from an LTE base station in a wireless communication network, wherein the UE is a Wi-Fi group owner (GO) equipped with an LTE radio transceiver and a co-located Wi-Fi radio transceiver;
determining desired DRX parameters and transmitting an in-device coexistence (IDC) indicator from the LTE radio transceiver to the base station;
generating Wi-Fi scheduling parameters by the UE, wherein the Wi-Fi scheduling parameters comprise at least one of client traffic window information and absent time information of the GO; and
transmitting the Wi-Fi scheduling parameters to a Wi-Fi group client (GC).
16. The method of claim 15 , wherein the DRX parameters reflect LTE active time and LTE inactive time of the LTE radio transceiver, which correspond to GO inactive time and GO active time of the Wi-Fi transceiver.
17. The method of claim 16 , wherein the desired DRX parameters are determined to increase an effective Wi-Fi active time of the Wi-Fi transceiver.
18. The method of claim 16 , wherein an opportunistic power saving scheme is adopted by the GO, and wherein the Wi-Fi scheduling parameters comprise a beacon interval and a client traffic window duration.
19. The method of claim 18 , wherein the GO client traffic window duration aligns with the GO active time.
20. The method of claim 16 , wherein a notification of absence scheme is adopted by the GO, and wherein the Wi-Fi scheduling parameters comprise a start time, an interval, a duration, and a count of GO absence.
21. The method of claim 20 , wherein the GO absent duration aligns with the GC inactive time.
22. The method of claim 15 , wherein the GO applies a notification of absence scheme as well as an opportunistic power saving scheme.