Binding IEEE 802.11 MAC frames to logical channels
View Patent ↗An IEEE 802.11 media access control (MAC) frame (or contents thereof) at a transmitter apparatus includes information from which a logical channel carrying traffic can be identified, so that a receiver apparatus, when unpacking the IEEE 802.11 MAC frame (or contents thereof), is able to route the traffic to the appropriate radio link control (RLC) entity associated with the logical channel. An evolved Node B (eNB) that is also an access point (AP) distinguishes conventional uplink wireless local area network (WLAN) traffic from traffic that is to be routed to an RLC layer.
1. A routing method performed by a receiver apparatus, the routing method comprising:
identifying a logical channel from information contained in an IEEE 802.11 media access control (MAC) protocol data unit (PDU), a payload of the IEEE 802.11 MAC PDU containing a 3GPP radio link control (RLC) PDU; and
routing the RLC PDU within the receiver apparatus to an RLC entity that is associated with the identified logical channel,
wherein identifying the logical channel comprises:
at a component of the receiver apparatus that implements an IEEE 802.11 MAC layer, identifying the logical channel from a value stored in a source address field or a destination address field or a receiver address field or a transmitter address field of a header of the IEEE 802.11 MAC PDU.
2. A routing method performed by a receiver apparatus, the routing method comprising:
identifying a logical channel from information contained in an IEEE 802.11 media access control (MAC) protocol data unit (PDU), a payload of the IEEE 802.11 MAC PDU containing a 3GPP radio link control (RLC) PDU; and
routing the RLC PDU within the receiver apparatus to an RLC entity that is associated with the identified logical channel,
wherein the payload of the IEEE 802.11 MAC PDU contains an IEEE 802.2 logical link control (LLC) PDU and a payload of the IEEE 802.2 LLC PDU contains the 3GPP RLC PDU, and identifying the logical channel comprises:
at a component of the receiver apparatus that implements an IEEE 802.2 LLC layer:
determining that the IEEE 802.2 LLC PDU contains an LLC sub-network access protocol (SNAP) PDU; and
identifying the logical channel from a value in a Protocol Type field of the LLC SNAP PDU.
3. A routing method performed by a receiver apparatus, the routing method comprising:
identifying a logical channel from information contained in an IEEE 802.11 media access control (MAC) protocol data unit (PDU), a payload of the IEEE 802.11 MAC PDU containing a 3GPP radio link control (RLC) PDU; and
routing the RLC PDU within the receiver apparatus to an RLC entity that is associated with the identified logical channel,
wherein the payload of the IEEE 802.11 MAC PDU contains an IEEE 802.2 logical link control (LLC) PDU and a payload of the IEEE 802.2 LLC PDU contains the 3GPP RLC PDU, and identifying the logical channel comprises:
at a component of the receiver apparatus that implements an IEEE 802.2 LLC layer, identifying the logical channel from LLC service access point (SAP) values in a LLC header contained in the IEEE 802.2 LLC PDU.
4. A routing method performed by a receiver apparatus, the routing method comprising:
identifying a logical channel from information contained in an IEEE 802.11 media access control (MAC) protocol data unit (PDU), a payload of the IEEE 802.11 MAC PDU containing a 3GPP radio link control (RLC) PDU; and
routing the RLC PDU within the receiver apparatus to an RLC entity that is associated with the identified logical channel,
wherein the payload of the IEEE 802.11 MAC PDU contains a Long Term Evolution (LTE) MAC header and identifying the logical channel comprises:
at a component of the receiver apparatus that implements an upper Long Term Evolution (LTE) MAC layer, identifying the logical channel from logical channel identifier (LCD) values in the LTE MAC header.
5. A method performed by a transmitter apparatus for handling 3GPP radio link control (RLC) protocol data units (PDUs), the method comprising:
selecting a frame to be transported over a wireless local area network (WLAN) air interface, the frame containing a 3GPP RLC PDU from a particular logical channel; and
generating an IEEE 802.11 MAC frame that contains the 3GPP RLC PDU in a payload of the IEEE 802.11 MAC frame and that contains identifying information from which the particular logical channel can be identified,
wherein generating the IEEE 802.11 MAC frame comprises:
at a component of the transmitter apparatus that implements an IEEE 802.11 MAC layer, generating a header for the IEEE 802.11 MAC frame that contains the identifying information in a source address field or a destination address field or a receiver address field or a transmitter address field of the header.
6. A method performed by a transmitter apparatus for handling 3GPP radio link control (RLC) protocol data units (PDUs), the method comprising:
selecting a frame to be transported over a wireless local area network (WLAN) air interface, the frame containing a 3GPP RLC PDU from a particular logical channel;
generating an IEEE 802.11 MAC frame that contains the 3GPP RLC PDU in a payload of the IEEE 802.11 MAC frame and that contains identifying information from which the particular logical channel can be identified, and
at a component of the transmitter apparatus that implements an IEEE 802.2 Logical Link Control (LLC) layer:
generating an LLC Sub-Network Access Protocol (SNAP) PDU that includes i) an organizationally-unique identifier (OUI) value assigned for 3 rd generation partnership protocol (3GPP) use, ii) an identification of the logical channel in a Protocol Type field; and iii) the 3GPP RLC PDU in a Protocol Data field; and
generating an LLC header that indicates presence of the LLC SNAP PDU,
wherein generating the IEEE 802.11 MAC frame comprises including the LLC header and the LLC SNAP PDU in the payload of the IEEE 802.11 MAC frame.
7. A method performed by a transmitter apparatus for handling 3GPP radio link control (RLC) protocol data units (PDUs), the method comprising:
selecting a frame to be transported over a wireless local area network (WLAN) air interface, the frame containing a 3GPP RLC PDU from a particular logical channel;
generating an IEEE 802.11 MAC frame that contains the 3GPP RLC PDU in a payload of the IEEE 802.11 MAC frame and that contains identifying information from which the particular logical channel can be identified, and
at a component of the transmitter apparatus that implements an IEEE 802.2 Logical Link Control (LLC) layer:
generating an LLC header having LLC service access point (SAP) values from which the particular logical channel can be identified,
wherein generating the IEEE 802.11 MAC frame comprises including the LLC header in the payload of the IEEE 802.11 MAC frame.
8. A method performed by a transmitter apparatus for handling 3GPP radio link control (RLC) protocol data units (PDUs), the method comprising:
selecting a frame to be transported over a wireless local area network (WLAN) air interface, the frame containing a 3GPP RLC PDU from a particular logical channel;
generating an IEEE 802.11 MAC frame that contains the 3GPP RLC PDU in a payload of the IEEE 802.11 MAC frame and that contains identifying information from which the particular logical channel can be identified, and
at a component of the transmitter apparatus that implements an upper Long Term Evolution (LTE) MAC layer:
generating an LTE MAC header having logical channel identifier (LCID) values from which the particular logical channel can be identified,
wherein generating the IEEE 802.11 MAC frame comprises including the LTE MAC header in the payload of the IEEE 802.11 MAC frame.