Latency reduction for mode switching in sidelink communications
First Claim
1. A method in a wireless terminal which selectively communicates with a node of a radio access network over a radio interface, the method comprising:
- providing a first set of radio resources which may be used by the wireless terminal when performing a device-to-device (D2D/SL) communication with another wireless terminal when the wireless terminal is within coverage of a radio access network;
providing a second set of radio resources which may be used by the wireless terminal when performing a device-to-device (D2D/SL) communication with the another wireless terminal when the wireless terminal is not within coverage of the radio access network;
using a processor to determine a resource switch-causing event of a random access procedure;
the processor, upon occurrence of the resource switch-causing event, allowing the wireless terminal, when still within coverage of the radio access network, to use the second set of resources for the device-to-device (D2D/SL) communication in conjunction with the random access procedure.
2 Assignments
0 Petitions
Accused Products
Abstract
A wireless terminal (26) is capable of wireless communications with a node (22) of a radio access network over a radio interface. A method in the wireless terminal (26) comprises providing both a first set of radio resources (56) and a second set of radio resources (58). The first set of radio resources (56) is which may be used by the wireless terminal when performing a device-to-device (D2D/SL) communication with another wireless terminal when the wireless terminal is within coverage of a radio access network. The second set of radio resources (58) is which may be used by the wireless terminal when performing a device-to-device (D2D/SL) communication with the other wireless terminal when the wireless terminal is not within coverage of the radio access network. The method further comprises allowing the wireless terminal (26), when still within coverage of the radio access network, to use the second set of resources (58) for the device-to-device (D2D/SL) communication in conjunction with a random access procedure.
25 Citations
12 Claims
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1. A method in a wireless terminal which selectively communicates with a node of a radio access network over a radio interface, the method comprising:
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providing a first set of radio resources which may be used by the wireless terminal when performing a device-to-device (D2D/SL) communication with another wireless terminal when the wireless terminal is within coverage of a radio access network; providing a second set of radio resources which may be used by the wireless terminal when performing a device-to-device (D2D/SL) communication with the another wireless terminal when the wireless terminal is not within coverage of the radio access network; using a processor to determine a resource switch-causing event of a random access procedure; the processor, upon occurrence of the resource switch-causing event, allowing the wireless terminal, when still within coverage of the radio access network, to use the second set of resources for the device-to-device (D2D/SL) communication in conjunction with the random access procedure.
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2. A wireless terminal which selectively communicates over a radio interface with a node of a radio access network, the wireless terminal comprising:
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a memory configured to store an identification of a first set of radio resources and an identification of a second set of radio resources; a processor configured to allocate a radio resource from the first set of radio resources which may be used by the wireless terminal when performing a device-to-device (D2D/SL) communication with another wireless terminal when the wireless terminal is within coverage of a radio access network and to allocate a radio resource from the second set of radio resources which may be used by the wireless terminal when performing a device-to-device (D2D/SL) communication with the another wireless terminal when the wireless terminal is not within coverage of the radio access network; wherein the processor is configured to determine a resource switch-causing event of a random access procedure; wherein the processor is configured, upon occurrence of the resource switch- causing event, to allow the wireless terminal, when still within coverage of the radio access network, to use the second set of resources for the device-to-device (D2D/SL) communication in conjunction with the random access procedure. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification