Methods and apparatus for providing non-uniform de-multiplexing in a multi-carrier wide band CDMA system
First Claim
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1. A wideband spread spectrum code division multiple access wireless telecommunications system, comprising:
- at least one base station;
at least one mobile station; and
a data distribution system in said base station for non-uniformly distributing data amongst a plurality of subchannels that are overlaid upon narrower bandwidth underlying channels before transmission of said plurality of subchannels to said mobile station, said data distribution system non-uniformly distributing the data in accordance with a total load that is already present in each of the subchannels due to the presence of the underlying channels.
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Abstract
A wireless telecommunications system that includes at least one base station, at least one mobile station, and a data distribution system in the base station for non-uniformly distributing data amongst a plurality of subchannels that are overlaid upon underlying channels before transmission of the plurality of subchannels to the mobile station. The data distribution system non-uniformly distributes the data in accordance with a total load that is already present in each of the subchannels due to the presence of the underlying channels.
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Citations
16 Claims
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1. A wideband spread spectrum code division multiple access wireless telecommunications system, comprising:
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at least one base station;
at least one mobile station; and
a data distribution system in said base station for non-uniformly distributing data amongst a plurality of subchannels that are overlaid upon narrower bandwidth underlying channels before transmission of said plurality of subchannels to said mobile station, said data distribution system non-uniformly distributing the data in accordance with a total load that is already present in each of the subchannels due to the presence of the underlying channels.
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2. A multi-channel wireless communication system of a type utilizing a first spread spectrum communication subsystem with a plurality of subchannels capable of being overlaid upon one or more channels of a second spread spectrum communication subsystem, comprising in a transmission station thereof:
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a data distributor for distributing information signals non-uniformly amongst said subchannels based upon a plurality of criteria; and
coupled to outputs of said data distributor, circuitry for spreading and transmitting said information signals to said plurality of subchannels;
wherein said plurality of criteria are comprised of a first noise-related factor N0 and a plurality of second noise-related factors N2G, wherein the first noise-related factor N0 is independent of information signals transmitted within said overlaid channels, and wherein individual ones of the plurality of second factors N2G are dependent upon information signals transmitted within individual ones of said overlaid channels. - View Dependent Claims (3, 4, 5, 6, 7)
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8. A multi-channel wireless communication system of a type utilizing a first spread spectrum communication subsystem with a plurality of subchannels capable of being overlaid upon one or more channels of a second spread spectrum communication subsystem, comprising in a transmission station thereof:
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a data distributor for distributing information signals non-uniformly amongst said subchannels based upon a plurality of criteria, wherein said data distributor operates with a set of symbol transmission rates fi for an ith channel, which is dependent upon;
a positive integer M which denotes a total number of subchannels, said first noise related factor N0, said second factors N2G, and a desired total transmission rate r, in accordance withwherein in the summation constituting part of the numerator, the j'"'"'s do not include i; and
coupled to outputs of said data distributor, circuitry for spreading and transmitting said information signals to said plurality of subchannels;
wherein said plurality of criteria are comprised of a first noise-related factor N0 and a plurality of second noise-related factors N2G, wherein the first noise-related factor N0 is independent of information signals transmitted within said overlaid channels, and wherein individual ones of the plurality of second factors N2G are dependent upon information signals transmitted within individual ones of said overlaid channels.
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9. A method for use in a multi-channel wireless communication system of a type utilizing a first spread spectrum communication subsystem with a plurality of subchannels capable of being overlaid upon channels of a second spread spectrum communication subsystem, comprising steps of:
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distributing information signals non-uniformly amongst said subchannels based upon a plurality of criteria; and
spreading and transmitting said information signals to said plurality of subchannels;
wherein said plurality of criteria are comprised of a first noise-related factor N0 and said second noise-related factor N2G, wherein the first noise-related factor N0 is independent of information signals transmitted within said overlaid channels, and wherein the second factor N2G is dependent upon information signals transmitted within said overlaid channels. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method for use in a multi-channel wireless communication system of a type utilizing a first spread spectrum communication subsystem with a plurality of subchannels capable of being overlaid upon channels of a second spread spectrum communication subsystem, comprising steps of:
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distributing information signals non-uniformly amongst said subchannels based upon a plurality of criteria, wherein the step of distributing operates with a set of symbol transmission rates fi for an ith channel, which is dependent upon;
a positive integer M which denotes denotes a total number of subchannels, said first noise related factor N0, said second factor N2G, and a desired total transmission rate r, in accordance withwherein in the summation constituting part of the numerator, the j'"'"'s do not include i; and
spreading and transmitting said information signals to said plurality of subchannels;
wherein said plurality of criteria are comprised of a first noise-related factor N0 and said second noise-related factor N2G, wherein the first noise-related factor N0 is independent of information signals transmitted within said overlaid channels, and wherein the second factor N2G is dependent upon information signals transmitted within said overlaid channels.
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16. A spread spectrum code division multiple access wireless telecommunications system, comprising:
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at least one base station;
a plurality of mobile stations located in a region served by said at least one base station; and
a transmitted data distribution system in said base station for non-uniformly distributing information bits to be transmitted amongst X first spread spectrum system channels, at least one of said X channels coexisting with a second spread spectrum system channel, said data distribution system non-uniformly distributing the information bits in accordance with a first noise factor that is substantially independent of transmitted information bits and X second noise factors individual ones of which are associated with information bits being transmitted in one of said X first spread spectrum channels.
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Specification