Abstract:
The present invention discloses a communication method for transmitting multimedia data during a call between terminals. The method comprises: receiving a multimedia data transmission request initiated from one of the terminals in the call; and responsive to the request, transmitting the multimedia data to one or more of the terminals in the call.
Abstract:
The present invention relates to a mobile communication field. The present invention provides a method and an apparatus for WiMAX positioning by downlink preamble fast detection DPFD. The method comprises steps of: Mobile user station MSS detects downlink preambles from BSs, all of which are synchronized by in TDD mode mobile WiMAX; the TDoA of different BSs' preamble is get through preamble-based synchronization detection; and the exact location is calculated through classical TDoA algorithms. The embodiment of the present invention describes a novel concept for measuring the position of the mobile user equipment by the uplink ranging assistant downlink preamble detection. With the mobile WiMAX is accepted as a 3G standard by ITU and widely populated, the position based on WiMAX will be a market-potential service.
Abstract:
Transmission methods for multicast messages and for signaling message responses thereto in communication systems supporting a multicast mode provide that a number of retransmissions of a multicast message may be changed based on a number of receivers (105) of the message. Signaling messages to the multicast message may be transmitted in response to a fixed number of multicast message transmissions, and receivers (105) that have not received the multicast message after the fixed number of transmissions may request further retransmissions up to an additional given number of times. Further, signaling messages may be transmitted at different times or staggered based on a radio condition of the receivers (105). For example, a first multicast message may be transmitted, and responses from groups of receivers (105) may be listened to for a given period, after which one of a next multicast message and a portion of the first multicast message may be transmitted to the groups.