Wireless communications involving a fast initial link setup, FILS, discovery frame for network signaling

Patent metadata

Field	Value
Publication number	US-11140725-B2
Application number	US-201916601962-A
Country	US
Kind code	B2
Filing date	Oct 15, 2019
Priority date	Feb 12, 2015
Publication date	Oct 5, 2021
Grant date	Oct 5, 2021

Abstract

Embodiments include methods performed by a network node in a wireless communication network. The node is part of a first BSS that is one of a plurality of BSS in a Mobility Domain (MD) that supports a Fast BSS Transition procedure. Such methods include transmitting one or more Fast Initial Link Setup Discovery (FD) frames. Each FD frame includes an identifier of the first MD, which enables receiving devices to determine, without receiving any non-FD frames from the network node, whether to associate with the network node via the Fast BSS Transition procedure. Such methods include associating with a first device through the Fast BSS procedure, wherein the first wireless communication device was previously associated with one of the BSS in the MD. Other embodiments include complementary methods performed by devices, as well as network nodes and devices configured to perform such methods.

First claim

The invention claimed is:

1. A method performed by a network node in a wireless communication network, the network node being part of a first basic service set (BSS) that is one of a plurality of BSS in a Mobility Domain (MD) that supports a Fast BSS Transition procedure, the method comprising:
transmitting one or more Fast Initial Link Setup Discovery (FD) frames, wherein:
each FD frame includes an identifier of the MD, and
the identifier enables receiving wireless communication devices to determine, without receiving any non-FD frames from the network node, whether to associate with the network node via the Fast BSS Transition procedure; and

associating with a first wireless communication device through the Fast BSS Transition procedure, wherein the first wireless communication device was previously associated with a second BSS in the MD.

2. The method of claim 1 , wherein:
the method further comprises associating with a second wireless communication device through a full authentication procedure; and
the second wireless communication device was not previously associated with any of the BSS in the MD.

3. The method of claim 1 , wherein:
the method further comprises transmitting a plurality of beacon frames; and
transmitting the one or more FD frames comprises transmitting a plurality of the FD frames between each successive pair of the beacon frames.

4. The method of claim 1 , wherein associating with the first wireless communication device through the Fast BSS procedure comprises:
receiving, from the first wireless communication device, a first request including the identifier of the MD that is included in the one or more FD frames;
transmitting, to the first wireless communication device, a first response including the identifier of the MD and information usable to derive an encryption key for secure communication between the network node and the first wireless communication device; and
receiving a second request, from the first wireless communication device, within a Reassociation Deadline Time after receiving the first request.

5. The method of claim 1 , wherein the identifier of the MD is included in the FD frame, in either a hashed or an unhashed format, as one of the following:
as a field of an existing FD frame element;
as a separate FD frame element; or
as part of a separate MD Element (MDE), in the FD frame, that also includes a Fast Transition (FT) Capability and Policy field.

6. A non-transitory, computer-readable medium storing computer-executable instructions that, when executed by a processor of a network node in a wireless communication network, configure the network node to perform operations corresponding to the method of claim 1 .

7. A method, performed by a wireless communication device, for associating with a network node in a wireless communications network, the method comprising:
receiving, from the network node, one or more Fast Initial Link Setup Discovery (FD) frames, wherein:
each FD frame includes an identifier of a Mobility Domain (MD) that supports a Fast BSS Transition procedure, and
the MD includes a plurality of basic service sets (BSS) including a first BSS associated with the network node;

without receiving any non-FD frames from the network node, determining whether to associate with the network node via the Fast BSS Transition procedure, based on the identifier of the MD and on a second BSS to which the wireless communication device is currently associated; and
associating with the network node through the Fast BSS Transition procedure, based on determining that the second BSS is one of the BSS in the MD.

8. The method of claim 7 , further comprising associating with the network node through a full authentication procedure, based on determining that the second BSS is not one of the BSS in the MD.

9. The method of claim 7 , wherein receiving the one or more FD frames comprises receiving a plurality of the FD frames prior to detecting a beacon frame transmitted by the network node.

10. The method of claim 7 , wherein associating with the network node through the Fast BSS procedure comprises:
transmitting, to the network node, a first request including the identifier of the MD received in the one or more FD frames;
receiving, from the network node, a first response including the identifier of the MD and information usable to derive an encryption key for secure communication between the network node and the wireless communication device; and
transmitting a second request, to the network node, within a Reassociation Deadline Time after transmitting the first request.

11. The method of claim 7 , wherein the identifier of the MD is included in the FD frame, in either a hashed or an unhashed format, as one of the following:
as a field of an existing FD frame element;
as a separate FD frame element; or
as part of a separate MD Element (MDE), in the FD frame, that also includes a Fast Transition (FT) Capability and Policy field.

12. A non-transitory, computer-readable medium storing computer-executable instructions that, when executed by a processor of a wireless communication device, configure the wireless communication device to perform operations corresponding to the method of claim 7 .

13. A network node in a wireless communication network, the network node being part of a first basic service set (BSS) that is one of a plurality of BSS in a Mobility Domain (MD) that supports a Fast BSS Transition procedure, the network node comprising:
a transceiver circuit; and
a processing circuit coupled to the transceiver circuit, whereby the processing circuit and the transceiver circuit are operable to:
transmit one or more Fast Initial Link Setup Discovery (FD) frames, wherein:
each FD frame includes an identifier of the MD, and
the identifier enables receiving wireless communication devices to determine, without receiving any non-FD frames from the network node, whether to associate with the network node via the Fast BSS Transition procedure; and

associate with a first wireless communication device through the Fast BSS Transition procedure, wherein the first wireless communication device was previously associated with a second BSS in the MD.

14. The network node of claim 13 , wherein:
the processing circuit and the transceiver circuit are further operable to associate with a second wireless communication device through a full authentication procedure; and
the second wireless communication device was not previously associated with any of the BSS in the first MD.

15. The network node of claim 13 , wherein the processing circuit and the transceiver circuit are further operable to:
transmit a plurality of beacon frames, and
transmit a plurality of the FD frames between each successive pair of the beacon frames.

16. The network node of claim 13 , wherein the processing circuit and the transceiver circuit are operable to associate with the first wireless communication device through the Fast BSS procedure by:
receiving, from the first wireless communication device, a first request including the identifier of the MD included in the one or more FD frames;
transmitting, to the first wireless communication device, a first response including the identifier of the MD and information usable to derive an encryption key for secure communication between the network node and the first wireless communication device; and
receiving a second request, from the first wireless communication device, within a Reassociation Deadline Time after receiving the first request.

17. The network node of claim 13 , wherein the id

Assignees

• Ericsson Telefon Ab L M

Inventors

• Mestanov Filip
• Rayment Stephen

Classifications

• H04W12/50

  Secure pairing of devices · CPC title

• H04W36/142

  over the same radio air interface technology · CPC title

• H04W48/12

  using downlink control channel · CPC title

• H04W76/10 Primary

  Connection setup · CPC title

• H04L63/0853 Primary

  using an additional device, e.g. smartcard, SIM or a different communication terminal (cryptographic mechanisms or cryptographic arrangements for entity authentication involving additional secure or trusted devices H04L9/3234) · CPC title