Multicasting system and method for vehicular communication network
First Claim
1. A roadside communication devices comprising:
- a communication unit configured to communicate with a plurality of vehicular communication devices and at least one neighboring roadside communication device;
a beacon analysis unit configured to analyze beacon frames from the roadside communication device and the at least one neighboring roadside communication device when a slot allocation request is received from one of the vehicular communication devices;
a determination unit configured to search for a period in which a slot has not been allocated by the roadside communication device and the at least one neighboring roadside communication device and determine whether a period for allocation of a slot to the vehicular communication device is present; and
a slot allocation unit configured to allocate a slot period for multicasting by the vehicular communication device based on results of the determination of the determination unit;
wherein the slot allocation unit, when the vehicular communication device enters a data communication area of the roadside communication device after a slot period has been allocated by the at least one neighboring roadside communication device, allocates information about the entry of the vehicular communication device to a period which belongs to a slot period of the beacon frame of the roadside communication device and which corresponds to the slot period allocated by the at least one neighboring roadside communication device.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed herein are a multicasting system and method for a vehicular communication network. The multicasting system includes a plurality of roadside communication devices for communicating with a plurality of vehicular communication devices. Each of the roadside communication devices includes a communication unit for communicating with the plurality of vehicular communication devices and at least one neighboring roadside communication device, a beacon analysis unit for analyzing beacon frames when a slot allocation request is received from one of the vehicular communication devices, a determination unit for searching for a period in which a slot has not been allocated and determining whether a period for allocation of a slot to the vehicular communication device is present, and a slot allocation unit for allocating a slot period for multicasting of the vehicular communication device based on results of the determination of the determination unit.
-
Citations
14 Claims
-
1. A roadside communication devices comprising:
- a communication unit configured to communicate with a plurality of vehicular communication devices and at least one neighboring roadside communication device;
a beacon analysis unit configured to analyze beacon frames from the roadside communication device and the at least one neighboring roadside communication device when a slot allocation request is received from one of the vehicular communication devices; a determination unit configured to search for a period in which a slot has not been allocated by the roadside communication device and the at least one neighboring roadside communication device and determine whether a period for allocation of a slot to the vehicular communication device is present; and a slot allocation unit configured to allocate a slot period for multicasting by the vehicular communication device based on results of the determination of the determination unit; wherein the slot allocation unit, when the vehicular communication device enters a data communication area of the roadside communication device after a slot period has been allocated by the at least one neighboring roadside communication device, allocates information about the entry of the vehicular communication device to a period which belongs to a slot period of the beacon frame of the roadside communication device and which corresponds to the slot period allocated by the at least one neighboring roadside communication device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a communication unit configured to communicate with a plurality of vehicular communication devices and at least one neighboring roadside communication device;
-
9. A method, by a roadside communication device, comprising:
-
receiving a beacon frame from at least one neighboring roadside communication device when a slot allocation request is received from each of the vehicular communication devices; analyzing beacon frames received from the roadside communication device and the at least one neighboring roadside communication device; searching for a period in which a slot has not been allocated by the roadside communication device and the at least one neighboring roadside communication device; and allocating a slot period for multicasting by the vehicular communication device based on results of the searching of the determination unit; wherein the allocating comprises, when the vehicular communication device enters a data communication area of the roadside communication device after a slot period has been allocated by the at least one neighboring roadside communication device, allocating information about the entry of the vehicular communication device to a period which belongs to a slot period of the beacon frame of the roadside communication device and which corresponds to the slot period allocated by the at least one neighboring roadside communication device. - View Dependent Claims (10, 11, 12, 13, 14)
-
Specification