IEEE 1609-4:2011 pdf free download

IEEE 1609-4:2011 pdf free download.IEEE Standard for Wireless Access in Vehicular Environments (WAVE)一Multi-channel Operation.
4.3.3 Management plane services
The MLME management services specified in Clause 6 compnse the following:
— Multi-channel synchronization
The MLME uses infomiation derived locally and rcecied over the air to provide a synchronisation function with the objectise of aligning channel intervals among communicating WAVE devices. The MIME provides the capability to generate Timing Adsertisement (TA) frames to distribute system timing information and monitor received TA frames.
— Channel access
The MLME controls the access to specific radio channels in support of communication requests received from the WME.
— Vendor Specific Action frames
The MLMF will accept incoming VSA frames and pass them to the WAVE Management Entity: the MLME will also generate VSA frames for transmission at the request of WME.
— Other IEEE $02.11 services
The MIME allows access to IEEE 802.11 services, which may be invoked on a per-channel basis,
— MID maintenance
The MIME. maintains a managcmcnt information base (MIII) containing configuration and status information.
— Readdressing
The MIME allows device address changes to be triggered in support of pseudonymity.
5. Data plane services
5.1 General
WAVE devices shall communicate outside the context of an IEEE 802.11 basic service set (i.e.. with dotion(equal true), as specified in IEEE Std 802, lip.
An example of a WAVE muhi-chaitnel MAC internal architecture is shown in Figure 2. This reference design architecture is used to specify the tilIowing transmit operations: channel routing, data queueing and prioritiianon, and channel coordination; however, actual implementations may depart from this example design. A WAVE MAC entity uses one or more instances of the MAC sublaycr entity specified in IEEE Std 802.11. as amended by IEEE Std 8O2.Ilp. operating outside the context of a basic service set. with the extensions delined herein. There are tsvo IEEE SW 802.llp MAC entities in the example design described in this cLause: one for the CCH and one for the S(’H. t)ata is pnoritired according to access catcgory (directly related to user priority), as indicated by the queues shown in Figure 2. which pnwide different contention and transmission parameters for different priority data frames. Prioritization is further specified in 5.4.
there are three types of information exchanged on the WAVE medium: management frames, data frames. and control frames. Control frames may be used per IEEE Std 802.11 and are not addressed in this standard. Management frames used by WAVE enter the data plane at the MAC layer.