Equipment and method for transmitting and receiving group transmission message by satellite link
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A technology of satellite links and equipment, applied in the direction of radio/induction link selection, radio transmission system, electrical components, etc., can solve the problems of expensive users and low efficiency of satellite systems
Inactive Publication Date: 2008-11-12
TELEFON AB LM ERICSSON (PUBL)
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[0008] This is problematic since this multiple transmissions of the same message (continuous retransmissions) are inefficient for satellite systems and very expensive for users
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[0023] According to the first embodiment, such as figure 1 As shown, a first device 1 suitable for transmission and reception, hereinafter referred to as T / R device, is arranged to communicate via a satellite link 2 being part of a satellite communication system 3 . Said T / R device 1, and other T / R devices mentioned below, may for example be a telephone or a portable computer arranged to communicate via a satellite link. The second 4 , third 5 , fourth 6 , fifth 7 and sixth 8 T / R devices are dispersed and arranged to communicate via the satellite link 2 . The second 4, the third 5, the fourth 6, the fifth 7 and the sixth 8 T / R devices in this example are all members of the first broadcast group 9, where the first T / R device 1 is going to send the first message to the first broadcast group 9. Each of the T / R devices 1, 4, 5, 6, 7, 8 is typically associated with one or more users (not shown).
[0024] Refer again figure 2 , each of the T / R devices 1 , 4 , 5 , 6 , 7 , 8 incl...
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Abstract
The present invention relates to a device (4, 5, 6, 7, 8) adapted for transmission and reception via a satellite link (2) in a satellite communication system (3). The device (4, 5, 6, 7, 8) is further a part of a group (9, 21) of similar devices (4, 5, 6, 7, 8), where the device (4, 5, 6, 7, 8) comprises a first address (14), unique for the device (4, 5, 6, 7, 8). The device (4, 5, 6, 7, 8) further comprises at least a second address (15, 19) that is common for the group (9, 21), enabling a message (22a, 22b, 22c) sent to the group (9, 21) to be addressed to the group (9, 21). This means that a single transmission is sufficient to reach all members (4, 5, 6, 7, 8) in the group (9, 21). The present invention also relates to a satellite communications system comprising devices according to the above. The present invention also relates to a method for transmission and reception via a satellite link.
Description
technical field [0001] The invention relates to a device adapted to transmit and receive via a satellite link in a satellite communication system, the device further being part of a group of similar devices, wherein the device comprises a first address unique to the device. [0002] The invention also relates to a satellite communication system comprising the above-mentioned device. [0003] The invention also relates to a method of transmitting and receiving via a satellite link as part of a satellite communication system. Background technique [0004] Sometimes it is desirable or necessary to communicate via a satellite link. Such satellite communications are required, for example, in desert areas, at sea or in other areas with poor or no coverage (ie, where there is no communications infrastructure) by ordinary cellular or landline telephone networks. [0005] Because satellite antennas transmit widely, satellite transmissions are received by a number of equipment suita...
Claims
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Application Information
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