摘要:
A method is devoted to the transmission, via a wave-based transmission infrastructure (RC) using an access method relying on multiplexing that is at least time division multiplexing, of content from at least one channel, each piece of content being arranged into one base data layer and at least one enhancement data layer, respectively associated with different transmission time slices, and broken down into portions transmitted during the time slices respectively associated with their layers. This method comprises i) the insertion, in a chosen location of each portion of a base data layer to be transmitted, within a chosen network layer, of at least one learning sequence processed according to a configuration scheme identical to that used to process the enhancement data layer, and ii) upon receiving a portion of a base data layer of a piece of content within a terminal (TC), extracting the learning sequence inserted into a chosen network layer, then estimating the reception quality based on that extracted learning sequence, and allowing it to use the next portion of the content's the enhancement data layer whenever the estimated quality is above a chosen threshold.
摘要:
A method, in a cellular communication network comprising cells with at least one switched off cell, for providing a minimum coverage for multimedia transmission, said multimedia being parted into a number of independent autonomous multimedia partitions, comprising the steps of: —transmitting from all neighbour cells (3-8) of said switched off cell (1), multimedia partition(s) of a primary subset over a normal range, —transmitting from at least a first (3-8) and a second (3-8) neighbour cells of said switched off cell (1), multimedia partition(s) of a secondary subset over an extended range (3′-8′), the secondary subset of said first neighbour cell (3-8) being partially disjoint of the secondary subset of said second neighbour cell (3-8) when first and second cells are adjacent.
摘要:
A method, in a cellular communication network comprising cells with at least one switched off cell, for providing a minimum coverage for multimedia transmission, said multimedia being parted into a number of independent autonomous multimedia partitions, comprising the steps of: —transmitting from all neighbor cells (3-8) of said switched off cell (1), multimedia partition(s) of a primary subset over a normal range, —transmitting from at least a first (3-8) and a second (3-8) neighbor cells of said switched off cell (1), multimedia partition(s) of a secondary subset over an extended range (3′-8′), the secondary subset of said first neighbor cell (3-8) being partially disjoint of the secondary subset of said second neighbor cell (3-8) when first and second cells are adjacent.
摘要:
A method is devoted to the transmission, via a wave-based transmission infrastructure (RC) using an access method relying on multiplexing that is at least time division multiplexing, of content from at least one channel, each piece of content being arranged into one base data layer and at least one enhancement data layer, respectively associated with different transmission time slices, and broken down into portions transmitted during the time slices respectively associated with their layers. This method comprises i) the insertion, in a chosen location of each portion of a base data layer to be transmitted, within a chosen network layer, of at least one learning sequence processed according to a configuration scheme identical to that used to process said enhancement data layer, and ii) upon receiving a portion of a base data layer of a piece of content within a terminal (TC), extracting said learning sequence inserted into a chosen network layer, then estimating the reception quality based on that extracted learning sequence, and allowing it to use the next portion of said content's said enhancement data layer whenever the estimated quality is above a chosen threshold.
摘要:
Within a user device to which a radio communication network infrastructure transmits data carried by a sequence of frames broadcast to the user device, each frame comprising a first section comprising data and a second section comprising redundancy information associated with the data of a predetermined number B of previous frames in the sequence, a number of consecutive lost frames is compared to a threshold dependent on the number B of previous frames with which said redundancy information is associated and encoding parameters that generate said redundancy information, and a request to retransmit at least one of the consecutive lost frames is sent to the radio communication network infrastructure if the number of consecutive lost frames exceeds said threshold.
摘要:
A control device (D), for a broadcast network (BN) intended for broadcasting contents of P channels to user terminals (T), comprises i) a management means (MM) arranged for grouping the P channels into K groups (with K≦N) according to at least one chosen criterion, and for associating a weighting factor to each of these groups, and ii) a grouping means (GM) arranged for grouping the contents according to the groups to which belong their respective channels in order these groups of content(s) be broadcasted according to a priority law depending on their associated weighting factors.
摘要:
A transmission device (ET) is intended to be a component of a time multiplexing (RC) transmission infrastructure with at least one channel and in different transmission time slots, of multimedia contents, such multimedia contents being arranged in at least two complementary data layers. Said device (D) is responsible, in the presence of an association of a time slot to each complementary layer constituting a channel multimedia content, i) for separating the complementary layers of each multimedia content to be transmitted, ii) for chopping up the separated complementary layers into portions of selected sizes, and iii) for incorporating each portion of a layer into a burst so as to transmit each burst during a time slot associated to the layer comprising the portion it integrates.
摘要:
Within a user device to which a radio communication network infrastructure transmits data carried by a sequence of frames broadcast to the user device, each frame comprising a first section comprising data and a second section comprising redundancy information associated with the data of a predetermined number B of previous frames in the sequence, a number of consecutive lost frames is compared to a threshold dependent on the number B of previous frames with which said redundancy information is associated and encoding parameters that generate said redundancy information, and a request to retransmit at least one of the consecutive lost frames is sent to the radio communication network infrastructure if the number of consecutive lost frames exceeds said threshold.
摘要:
The present invention relates to a method for providing an equal error protection to data packets in a burst transmission system. The data packets are grouped based upon respective priority levels and error protection is provided to each group of data packets based upon the respective priority level. The error protection codes for each group of data packets depending on the respective priority level is created using data of data packets of the group which are contained in the data section (20) of two or more bursts (10) forming a first set of bursts (50, 50.B, 50.E, 55) and the created error protection codes are transmitted in the error protection section (30) of one or more bursts (10) forming a second set of bursts (60, 60.B, 60.E, 65). The invention further relates to a burst transmission system for performing said method.
摘要:
The present invention relates to a method for providing an equal error protection to data packets in a burst transmission system. The data packets are grouped based upon respective priority levels and error protection is provided to each group of data packets based upon the respective priority level. The error protection codes for each group of data packets depending on the respective priority level is created using data of data packets of the group which are contained in the data section (20) of two or more bursts (10) forming a first set of bursts (50, 50.B, 50.E, 55) and the created error protection codes are transmitted in the error protection section (30) of one or more bursts (10) forming a second set of bursts (60, 60.B, 60.E, 65). The invention further relates to a burst transmission system for performing said method.