Packet access method in a cellular digital radio-communications system
First Claim
1. A method of performing cellular digital radio-communications in a time division multiple access system implemented within a network of geographical cells through which mobile stations travel, a base station being associated with each of the cells, at least one of the mobile stations communicating via the base station that is associated with the cell in which the one mobile station is located;
- the system being configured to convey signals organized in frames, each of which is constituted by N time slots, between the base station associated with a cell and the mobile stations located in that cell, and configured to associate each time slot with a distinct call between the base station and one of the mobile stations;
each of the frames in an up transmission direction, from the mobile stations to the base station, containing at least one shared time slot which is allocated to at least two distinct ones of the mobile stations;
said method comprising steps of;
for each shared time slot, providing a list of active mobile stations, an active mobile station being any one of the mobile stations to which the shared time slot is allocated and which additionally satisfies at least one predetermined selection criterion; and
for each frame in the up transmission direction, associating the shared time slot with a specific one of the mobile stations selected from the list of the active mobile stations, the selection being based on a predetermined strategy.
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Accused Products
Abstract
A method of performing cellular digital radiocommunications in a TDMA system implemented within a network of geographical cells through which mobile stations (SM1 to SM22) travel, a base station being associated with each of the cells, a mobile station communicating via the base station that is associated with the cell in which the mobile station is located. Each each of the frames in the up transmission direction, from the mobile stations to the base station, contain at least one shared time slot (IT6) which is allocated to at least two distinct mobile stations (SM7 to SM22). For each shared time slot (IT6), the system has a list (31) of the active mobile stations, an active mobile station being a mobile station to which the shared time slot is allocated, and which satisfies at least one predetermined selection criterion. For, each frame in the up transmission direction, the system associates each shared time slot with a mobile station chosen from the list of the active mobile stations associated with the shared time slot, the choice being made by using a predetermined strategy.
43 Citations
23 Claims
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1. A method of performing cellular digital radio-communications in a time division multiple access system implemented within a network of geographical cells through which mobile stations travel, a base station being associated with each of the cells, at least one of the mobile stations communicating via the base station that is associated with the cell in which the one mobile station is located;
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the system being configured to convey signals organized in frames, each of which is constituted by N time slots, between the base station associated with a cell and the mobile stations located in that cell, and configured to associate each time slot with a distinct call between the base station and one of the mobile stations; each of the frames in an up transmission direction, from the mobile stations to the base station, containing at least one shared time slot which is allocated to at least two distinct ones of the mobile stations; said method comprising steps of; for each shared time slot, providing a list of active mobile stations, an active mobile station being any one of the mobile stations to which the shared time slot is allocated and which additionally satisfies at least one predetermined selection criterion; and for each frame in the up transmission direction, associating the shared time slot with a specific one of the mobile stations selected from the list of the active mobile stations, the selection being based on a predetermined strategy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for transmitting data in a signal frame comprising a plurality of time slots, at least one of the time slots being a shared time slot allocated to a total number of at least two distinct mobile stations, comprising:
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utilizing a predetermined selection criterion to produce a list of active mobile stations from the total number of the mobile stations; selecting only one mobile station from the list of active mobile stations in accordance with a predetermined strategy; and transmitting the data in the shared time slot via the selected mobile station. - View Dependent Claims (23)
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Specification