Abstract
A scheme for multiplexing transport channels on one or several communication channels is used to operate in a normal mode and in a compressed mode which requires a lower symbol rate to provide in active periods in the communication channels. To match the symbol rate on each of the transport channels a symbol puncturing is performed in two passes: marked symbols are introduced and are subjected along with the other information symbols to different operations including an interleaving before being deleted from the transmitted sequence. Accordingly those operations can be performed in the same manner in the normal and compressed modes which limits the complexity of the communicating entities.
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| 3G | 30/06/2004 | ISLD-200407-015 | NORTEL NETWORKS LIMITED |
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Technologies
Multiple access
Product
Use Cases
Wireless communication
Services
Claim
1. Method of processing X streams of information symbols to be transmitted on Y communication channels, X and Y being positive integers, wherein the Y communication channels simultaneously occupy a transmission resource organized as successive frames, wherein the successive frames include compressed-mode frames each having at least one inactive period during which no symbol is transmitted, wherein the information symbols of each stream i (1âx89¦iâx89¦X) are transmitted in successive transmission time intervals each comprising Fi consecutive frames, Fi being a positive integer, and wherein, for each transmission time interval relating to a stream i (1âx89¦iâx89¦X), integers Ei, Îx94Ni TTI and Îx94Ni CM are defined such that Ei>0, Îx94Ni CM<0 if said transmission time interval comprises at least one compressed-mode frame and Îx94Ni CM=0 if said transmission time interval does not comprise any compressed-mode frame, the method comprising the following steps for each transmission time interval relating to a stream i (1âx89¦i âx89¦X):
forming a first sequence of Ei coded symbols from information symbols of said stream pertaining to said transmission time interval;
forming a second sequence of symbols including Ei+Îx94Ni TTI+Îx94Ni CM symbols extracted from the first sequence and âx88x92Îx94Ni CM marked symbols;
forming a third sequence of symbols by a permutation of the symbols of the second sequence;
distributing the symbols of the third sequence into Fi segments of consecutive symbols, the Fi segments being respectively assigned to the frames of said transmission time interval; and
for each frame of said transmission time interval, forming a fourth sequence of symbols extracted from the segment assigned to said frame, said permutation and the placing of the marked symbols in the second sequence when said transmission time interval comprises at least one compressed-mode frame being such that each marked symbol belongs, in the third sequence, to a segment assigned to a compressed-mode frame, and the following steps for each frame:
forming a fifth sequence of symbols including the symbols of the fourth sequence output for, said frame in relation to each stream;
distributing the symbols of the fifth sequence into Y segments of symbols, the Y segments being respectively assigned to the Y communication channels;
for each communication channel, forming a sixth sequence of symbols extracted from the segment assigned to said communication channel;
for each communication channel, forming a seventh sequence of symbols by a permutation of the symbols of the sixth sequence; and
transmitting on each conmmunication channel, in time slots of said frame, symbols extracted from the seventh sequence, each of said marked symbols being deleted before transmission on each communication channel when said frame is in compressed mode, so as to provide said inactive period within the frame.', 'forming a first sequence of Ei coded symbols from information symbols of said stream pertaining to said transmission time interval;', 'forming a second sequence of symbols including Ei+Îx94Ni TTI+Îx94Ni CM symbols extracted from the first sequence and âx88x92Îx94Ni CM marked symbols;', 'forming a third sequence of symbols by a permutation of the symbols of the second sequence;', 'distributing the symbols of the third sequence into Fi segments of consecutive symbols, the Fi segments being respectively assigned to the frames of said transmission time interval; and', 'for each frame of said transmission time interval, forming a fourth sequence of symbols extracted from the segment assigned to said frame, said permutation and the placing of the marked symbols in the second sequence when said transmission time interval comprises at least one compressed-mode frame being such that each marked symbol belongs, in the third sequence, to a segment assigned to a compressed-mode frame, and the following steps for each frame:', 'forming a fifth sequence of symbols including the symbols of the fourth sequence output for, said frame in relation to each stream;', 'distributing the symbols of the fifth sequence into Y segments of symbols, the Y segments being respectively assigned to the Y communication channels;', 'for each communication channel, forming a sixth sequence of symbols extracted from the segment assigned to said communication channel;', 'for each communication channel, forming a seventh sequence of symbols by a permutation of the symbols of the sixth sequence; and', 'transmitting on each conmmunication channel, in time slots of said frame, symbols extracted from the seventh sequence, each of said marked symbols being deleted before transmission on each communication channel when said frame is in compressed mode, so as to provide said inactive period within the frame.
2. Method according to claim 1, wherein said marked symbols are kept until the seventh sequences when said frame is in compressed mode, without being extracted from the seventh sequences for transmission.
3. Method according to claim 1, wherein additional marked symbols are inserted into the second or the fifth sequence, these symbols being kept until the seventh sequences so as to be transmitted with zero transmission power.
4. Device for processing X streams of information symbols to be transmitted on Y communication channels, X and Y being positive integers, the Y communication channels simultaneously occupying a transmission resource organized as successive frames, the successive frames including compressed-mode frames each having at least one inactive period during which no symbol is transmitted, the information symbols of each stream i (1âx89¦iâx89¦X) being transmitted in successive transmission time intervals each comprising Fi consecutive frames, Fi being a positive intefer, integers Ei, Îx94Ni TTI and Îx94Ni cm being defined for each transmission time interval relating to a stream i (1âx89¦iâx89¦X), with Ei>0, Îx94Ni cm<0 if said transmission time interval comprises at least one compressed-mode frame and Îx94Ni cm=0 if said transmission time interval does not comprise any compressed-mode frame, the device comprising:
means for forming a first sequence of Ei coded symbols from information symbols of each stream i (1âx89¦iâx89¦X) pertaining to a transmission time interval;
means for forming, for each transmission time interval relating to a stream i (1âx89¦iâx89¦X), a second sequence of symbols including Ei+Îx94Ni TTI+Îx94Ni CM symbols extracted from the first sequence and âx88x92Îx94Ni CM marked symbols;
means for forming a third sequence of symbols by a first permutation of the symbols of each second sequence;
means for distributing the symbols of each third sequence, formed for a transmission time interval relating to a stream i (1âx89¦iâx89¦X), into Fi segments of consecutive symbols respectively assigned to the frames of said transmission time interval, and for forming Fi fourth sequences of symbols respectively extracted from the segments assigned to said frames;
means for forming, for each frame, a fifth sequence of symbols including the symbols of the fourth sequence output for said frame in relation to each stream i (1âx89¦iâx89¦X);
means for distributing the symbols of each fifth sequence into Y segments of symbols respectively assigned to the Y communication channels;
means for forming a sixth sequence of symbols extracted from the segment assigned to each communication channel; and
means for forming a seventh sequence of symbols by a second permutation of the symbols of each sixth sequence, and for transmitting, in time slots of each frame on each communication channel, symbols extracted from the seventh sequence, wherein the first permutation and the placing of the marked symbols in the second sequence, formed for a transmission time interval relating to a stream when said transmission time interval comprises at least one compressed-mode frame, are such that each marked symbol belongs, in the third sequence formed for said transmission time interval, to a segment assigned to a compressed-mode frame, each of said marked symbols being deleted before transmission on each communication channel so as to provide said inactive period within the frame.', 'means for forming a first sequence of Ei coded symbols from information symbols of each stream i (1âx89¦iâx89¦X) pertaining to a transmission time interval;', 'means for forming, for each transmission time interval relating to a stream i (1âx89¦iâx89¦X), a second sequence of symbols including Ei+Îx94Ni TTI+Îx94Ni CM symbols extracted from the first sequence and âx88x92Îx94Ni CM marked symbols;', 'means for forming a third sequence of symbols by a first permutation of the symbols of each second sequence;', 'means for distributing the symbols of each third sequence, formed for a transmission time interval relating to a stream i (1âx89¦iâx89¦X), into Fi segments of consecutive symbols respectively assigned to the frames of said transmission time interval, and for forming Fi fourth sequences of symbols respectively extracted from the segments assigned to said frames;', 'means for forming, for each frame, a fifth sequence of symbols including the symbols of the fourth sequence output for said frame in relation to each stream i (1âx89¦iâx89¦X);', 'means for distributing the symbols of each fifth sequence into Y segments of symbols respectively assigned to the Y communication channels;', 'means for forming a sixth sequence of symbols extracted from the segment assigned to each communication channel; and', 'means for forming a seventh sequence of symbols by a second permutation of the symbols of each sixth sequence, and for transmitting, in time slots of each frame on each communication channel, symbols extracted from the seventh sequence, wherein the first permutation and the placing of the marked symbols in the second sequence, formed for a transmission time interval relating to a stream when said transmission time interval comprises at least one compressed-mode frame, are such that each marked symbol belongs, in the third sequence formed for said transmission time interval, to a segment assigned to a compressed-mode frame, each of said marked symbols being deleted before transmission on each communication channel so as to provide said inactive period within the frame.', '5. Device according to claim 4, wherein the means for forming the third, fourth, fifth, sixth and seventh sequences of symbols are arranged to keep said marked symbols until the seventh sequences formed for each compressed-mode frame, whereby said marked symbols are not extracted from the seventh sequences for transmission.', '6. Device according to claim 4, comprising means for inserting, into the second or fifth sequences, additional marked symbols which are kept until the seventh sequences so as to be transmitted with zero transmission power.', '7. Radiocommunication base station comprising source means for providing X streams of information symbols to be transmitted on Y communication channels simultaneously occupying a transmission resource organized as successive frames, X and Y being positive integers, processing means for forming sequences of output symbols from said X streams of information symbols, and transmission means for transmitting said sequences of output symbols on the Y communication channels, wherein the successive frames include compressed-mode frames each having at least one inactive period during which no symbol is transmitted, the information symbols of each stream i (1âx89¦iâx89¦X) being transmitted in successive transmission time intervals each comprising Fi consevutive frames, Fi being a positive integer, wherein integers Ei, Îx94Ni TTI and Îx94Ni cm are defined for each transmission time interval relating to a stream i (1âx89¦iâx89¦X), with Ei>0, Îx94Ni cm<0 if said transmission time interval comprises at least one compressed-mode frame and Îx94Ni cm=0 if said transmission time interval does not comprise any compressed-mode frame, wherein the processing means comprise:
means for forming a first sequence of Ei coded symbols from information symbols of each stream i (1âx89¦iâx89¦X) pertaining to a transmission time interval;
means for forming, for each transmission time interval relating to a stream i (1âx89¦iâx89¦X), a second sequence of symbols including Ei +Îx94Ni TTI+Îx94Ni cm symbols extracted from the first sequence and âx88x92Îx94Ni cm marked symbols;
means for forming a third sequence of symbols by a first permutation of the symbols of each second sequence;
means for distributing the symbols of each third sequence, formed for a transmission time interval relating to a stream i (1âx89¦iâx89¦X), into Fi segments of consecutive symbols respectively assigned to the frames of said transmission time interval, and for forming Fi fourth sequences of symbols respectively extracted from the segments assigned to said frames;
means for forming, for each frame, a fifth sequence of symbols including the symbols of the fourth sequence output for said frame in relation to each stream i (1âx89¦iâx89¦X);
means for distributing the symbols of each fifth sequence into Y segments of symbols respectively assigned to the Y communication channels;
means for forming a sixth sequence of symbols extracted from the segment assigned to each communication channel; and
means for forming one of said sequences of output symbols by a second permutation of the symbols of each sixth sequence,', 'means for forming a first sequence of Ei coded symbols from information symbols of each stream i (1âx89¦iâx89¦X) pertaining to a transmission time interval;', 'means for forming, for each transmission time interval relating to a stream i (1âx89¦iâx89¦X), a second sequence of symbols including Ei +Îx94Ni TTI+Îx94Ni cm symbols extracted from the first sequence and âx88x92Îx94Ni cm marked symbols;', 'means for forming a third sequence of symbols by a first permutation of the symbols of each second sequence;', 'means for distributing the symbols of each third sequence, formed for a transmission time interval relating to a stream i (1âx89¦iâx89¦X), into Fi segments of consecutive symbols respectively assigned to the frames of said transmission time interval, and for forming Fi fourth sequences of symbols respectively extracted from the segments assigned to said frames;', 'means for forming, for each frame, a fifth sequence of symbols including the symbols of the fourth sequence output for said frame in relation to each stream i (1âx89¦iâx89¦X);', 'means for distributing the symbols of each fifth sequence into Y segments of symbols respectively assigned to the Y communication channels;', 'means for forming a sixth sequence of symbols extracted from the segment assigned to each communication channel; and', 'means for forming one of said sequences of output symbols by a second permutation of the symbols of each sixth sequence,', 'wherein the first permutation and the placing of the marked symbols in the second sequence, formed for a transmission time interval relating to a stream when said transmission time interval comprises at least one compressed-mode frame, are such that each marked symbol belongs, in the third sequence formed for said transmission time interval, to a segment assigned to a compressed-mode frame, each of said marked symbols being deleted before transmission on each communication channel so as to provide said inactive period within the frame.', '8. Base station according to claim 7, wherein the means for forming the third, fourth, fifth and sixth sequences of symbols and the sequence of output symbols are arranged to keep said marked symbols until the sequences of output symbols formed for each compressed-mode frame, whereby said marked symbols are not extracted from the sequences of output symbol for transmission.', '9. Base station according to claim 7, wherein the processing means further comprise means for inserting, into the second or fifth sequences, additional marked symbols which are kept until the sequences of output symbols so as to be transmitted with zero transmission power.']
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.