A.2 Wi-Fi Peer-to-Peer

23.3033GPPProximity-based services (ProSe)Release 17Stage 2TS

Wi-Fi Peer-to-Peer (P2P) specification [13] defines an architecture and set of protocols that facilitate direct discovery and communication using the IEEE 802.11 technology [14].

To assist WLAN direct discovery and communication as required by the Wi-Fi P2P technology [13] the EPC needs to supply some or all of the following items as part of the Assistance Information:

– SSID: The SSID to use for Wi-Fi P2P operation. To be compliant with the Wi-Fi P2P specification [13] the SSID should be in the form "DIRECT-ab" where a, b are two random characters.

– WLAN Secret Key: The pre-shared key to be used by UEs to secure their Wi-Fi P2P communication. This is used by UEs as the Pairwise Master Key (PMK).

– Group Owner indication: If set, the UE should implement the Group Owner (GO) functionality specified in the Wi-Fi P2P specification [13]. The UE implementing this functionality essentially becomes an AP that transmits Beacons with the P2P Information Element and accepts associations from other Wi-Fi P2P devices or from legacy Wi-Fi devices (those not implementing the Wi-Fi P2P functionality). If not set, the UE should behave as a Wi-Fi P2P client that attempts to discover and associate with a GO.

– P2P Device Address of self: This is the WLAN Link Layer ID to be used by a UE when participating in a Wi-Fi P2P group.

– P2P Device Address of peers: This is a list of WLAN Link Layer IDs provided to a UE implementing the Group Owner functionality in a Wi-Fi P2P group. Such UEs should accept WLAN association requests only from devices that are included in this list.

– Operation channel: The channel on which Wi-Fi P2P discovery and communication should take place.

– Validity time: The time period during which the content provided in the assistance information is valid.

Annex B (informative):
Wild carded ProSe Application IDs