SINGLE CELL POINT TO MULTI-POINTS NETWORK SYSTEM AND DATA TRANSMISSION METHOD THEREOF

摘要

A single cell point to multi-points (SC-PTM) network system and a data transmission method thereof are provided. The SC-PTM network system includes a base station and a first mobile station group and a second mobile station group. The base station multicasts a message to the mobile station groups via a first bearer, and receives a plurality of confirmation notifications from the mobile station groups. The base station determines a data transmitting status of the mobile stations and re-transmits the message to the mobile stations of the group which has higher priority.

主权项

1. A data transmission method for a base station, the base station being used in a single cell point to multi-points (SC-PTM) network system, the SC-PTM network system further comprising a plurality of first mobile stations and a plurality of second mobile stations, the first mobile stations belonging to a first mobile station group and the second mobile stations belonging to a second mobile station group, and the base station multicasting a first message to the first mobile stations of the first mobile station group and the second mobile stations of the second mobile station group via a first bearer, the data transmission method comprising:
(a) the base station receiving a plurality of first confirmation notifications and a plurality of second confirmation notifications respectively from the first mobile stations and the second mobile stations via the first bearer; (b) the base station determining a first count of at least one third mobile station that has not received the first message according to the first confirmation notifications, and determining a second count of at least one fourth mobile station that has not received the first message according to the second confirmation notifications; (c) the base station to determining that the first count is not greater than a first count threshold and a sum of the first count and the second count is greater than the first count threshold; (d) the base station transmitting a first bearer switching instruction to the at least one third mobile station via the first bearer according to the result of the step (c), wherein the first bearer switching instruction is adapted to notify the at least one third mobile station to receive the first message via a second bearer; and (e) the base station transmitting the first message to the at least one third mobile station via the second bearer, wherein the base station transmits messages to the at least one third mobile station continuously via the second bearer.