OMAMRC transmission method and system with variation in the number of uses of the channel
AssigneeOrange
InventorsVisoz Raphaël, Ali Al Khansa, Stefan Cerovic
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Abstract
A transmission method with slow link adaptation intended for an OMAMRC telecommunication system with M sources (s1 . . . , sM), optionally L relays and a destination, M≥2, L≥0. A number of uses of the channel is allocated to each source for transmission and this number is determined by the destination during slow link adaptation for each source based on statistical knowledge of all of the channels.
Claims10
A transmission method, implemented by an Orthogonal Multiple-Access Multiple-Relay Channel (OMAMRC) telecommunication system with M sources (s1, . . . , sM), possibly L relays (ri . . . rL), and a destination (d), M≥2, L≥0, the method comprising:
- an initial phase comprising a link adaptation controlled by the destination;
- and,
- for each frame to be transmitted, a first phase of successive transmission by the M sources during M time slots of N1,i channel uses per source si i∈(1, . . . ,M} and a second phase reserved for one or more cooperative transmissions of N2 channel uses per time slot allocated to one or several nodes taken from among the M sources and the L relays, a use of the channel comprising a time-frequency resource, wherein the one node or the several nodes taken from among the M sources and the L relays are selected according to a selection strategy,
- wherein, during the initial phase:
- the sources are informed by the destination of the values of a ratio of channel uses between the first and second phases determined for each source and of initial bit rates allocated to each source,
- the number N1,i of channel uses allocated to each source to transmit during the first phase is variable between the sources and is determined by the destination together with the initial bit rates, during the link adaptation by determining a maximum of an average utility function, conditioned on the selection strategy used for selecting the one or several nodes during the second phase, for values of the channel use ratios taken from a finite set of discrete values and subject to the constraint of an average individual Block Error Rate (BLER) for each source.
An Orthogonal Multiple-Access Multiple-Relay Channel (OMAMRC) telecommunication system comprising:
- M sources (si, . . . , sM), L relays (r1, . . . , rL) and a destination (d), wherein M≥2, L≥0, wherein each of the M sources, L relays and the destination comprises a processor and a respective non-transitory computer readable medium comprising instructions stored thereon, which when executed by the respective processors configure the M sources, L relays and the destination to implement a transmission method comprising:
- an initial phase comprising a link adaptation controlled by the destination;
- and,
- for each frame to be transmitted, a first phase of successive transmission by the M sources during M time slots of N1,i channel uses per source si i∈(1, . . . M} and a second phase reserved for one or more cooperative transmissions of N2 channel uses per time slot allocated to one or several nodes taken from among the M sources and the L relays, a use of the channel comprising a time-frequency resource, wherein the one node or the several nodes taken from among the M sources and the L relays are selected according to a selection strategy,
- wherein during the initial phase:
- the sources are informed by the destination of the values of a ratio of channel uses between the first and second phases determined for each source and of initial bit rates allocated to each source,
- the number N1,i of channel uses allocated to each source to transmit during the first phase is variable between the sources and is determined by the destination together with the initial bit rates, during the link adaptation by determining a maximum of an average utility function, conditioned on the selection strategy used for selecting the one or several nodes during the second phase, for values of the channel use ratios taken from a finite set of discrete values and subject to the constraint of an average individual Block Error Rate (BLER) for each source.
Dependencies are inferred from the claim text.