Virtualized physical layer adapted for EHF contactless communication
A Physical Layer (PHY) of a host system of an electronic device may be implemented as a contactless PHY (cPHY) for extremely high frequency (EHF) contactless communication and the operation of EHF transmitters (TX), receivers (RX) and transceivers (EHF-XCVR) in an extremely high frequency integrated circuit (EHF IC) of the electronic device. The Host-cPHY translates logical communications requests from the Link Layer (LINK) into hardware-specific operations to affect transmission or reception of signals over an EHF contactless link. The Link Layer (LINK) may also be optimized as a contactless Link Layer (cLINK) for EHF contactless communication. A virtualized contactless Physical Layer (VcPHY) may comprise a contactless Physical Layer (Host-cPHY), and a contactless Link Layer (cLINK) for coupling a conventional Link Layer (LINK) with the contactless Physical Layer (Host-cPHY). Multiple data streams may be transported over the EHF contactless link over a range of frequencies.
1. A method of communicating between electronic devices over an EHF contactless communications link, at least one device having a host system comprising a Physical Layer (PHY) and a first Standards-based Data Link Layer (LINK) and an EHF contactless HAT IC comprising at least one transceiver (EHF-XCVR) and capable of communicating over the EHF contactless communications link, the method comprising:
receiving a data stream operating according to specifications of the first LINK;
translating the data stream such that it operates according to specifications of a contactless link-based Link Layer (cLINK) existing within the PHY and specifications of a contactless Physical Layer (Host-cPHY) existing within the PHY, wherein the Host-cPHY implements interface specifications and medium requirements for sending and receiving signals over the EHF contactless link via the EHF contactless EHF IC, and wherein the cLINK couples the first LINK with the Host-cPHY; and
contactlessly transmitting the translated data stream via the at least one EHF-XCVR.
2. The method of claim 1 , wherein the cLINK enables the first LINK to communicate with the Host-cPHY as though the Host-cPHY is a Physical Layer implementation from a corresponding Standards' specification.
3. The method of claim 2 , wherein the Standards' specification is selected from the group consisting of Display Port, HDMI, PCIe and USB.
4. The method of claim 1 , further comprising using the cLINK to perform at least one of discovering, configuring and maintenance functions that are directed towards enabling and maintaining a contactless link.
5. The method of claim 1 , further comprising using the cLINK to perform at least one of polling, beaconing and security verification functions.
6. The method of claim 1 , further comprising using the cLINK to perform link training to establish the EHF contactless communications link.
7. The method of claim 1 , further comprising using the cLINK to handle acknowledgements received from the Host-cPHY.
8. The method of claim 1 , further comprising using the cLINK to ensure that incoming data transmitted from another device over the EHF contactless communications is successfully received.
9. The method of claim 1 , wherein the cLINK and the Host-cPHY collectively form a virtualized contactless link-based Physical Layer (VcPHY) which is adapted to implement interface specifications and medium requirements for sending and receiving signals over the EHF contactless communications link.
10. The method of claim 9 , further comprising:
performing a power on reset (POR) sequence.
11. The method of claim 10 , wherein the POR sequence comprises:
beaconing, link training, and transporting data.