Method for balancing the ratio Eb/I in a service multiplexing CDMA system and telecommunication systems using same

• US 6,501,748 B1
• Filed: 04/20/2000
• Issued: 12/31/2002
• Est. Priority Date: 04/21/1999
• Status: Expired due to Term

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Telecom Europe (Mitsubishi Electric Corporation)
• Inventors: Belaïche, Vincent
• Primary Examiner(s): NGUYEN, STEVEN H D
• Application Number:
  US09/553,064
• Time in Patent Office: 985 Days
• Field of Search: 370/342, 370/335, 370/468, 370/252, 370/320, 370/345, 370/347, 370/336, 370/441, 370/442, 370/537-544, 370/505, 370/506, 375/219, 375/222, 375/130, 375/135, 375/136, 375/149, 375/262, 375/265, 375/354, 455/67.3, 714/755, 714/759, 714/776, 714/790, 714/792, 714/795
• US Class Current: 370/342
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713
• CPC Class Codes: H04J 3/22 in which the sources have different rates or codes simultaneous speech and digital data or video transmission H04M11/06; see provisional also H04J3/16
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0067 Rate matching H04L1/0013 and H04L1/08 take precedence
• CPC Class Codes: H04L 1/0068 by puncturing
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data
• CPC Class Codes: H04L 1/0075 Transmission of coding parameters to receiver H04L1/0023 takes precedence
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 5/023 Multiplexing of multicarrier modulation signals multicarrier modulation H04L27/2601

Abstract

A method for configuring a telecommunication system having at least one sending entity and one receiving entity connected by a link that ensures the transmission of several transport channels of different qualities of service in which the sending entity performs a rate matching between various qualities of service, after which the various qualities of service are multiplexed and where the matching rate specific to each quality of service is determined on the basis of a parameter (E_q) representative of the ratio Eb/I specific to the quality of service considered.

Claims

1. A method for configuring a channel of a Code Division Multiple Access (CDMA) telecommunication system having a plurality of entities communicating data via a plurality of transport channels, wherein said entities comprise at least one sending entity and at least one receiving entity, a phase of communication of said sending entity having a plurality of processing procedures specific to said plurality of transport channels, each of said processing procedures having a rate matching step, wherein said rate matching step executes a transformation of an input block of an initial size (Xi) into an output block of a final size (Yi), said method comprising:

a first entity determining a parameter (Eq) representative of a rate matching ratio of (Yi/Xi) for each of said processing procedures;

said first entity transmitting said parameter (Eq) to a second entity; and

at least said second entity calculating, for each of said processing procedures, said final size (Yi) as a function of said initial size (Xi) of said input block on a basis of a criterion, said criterion being dependent on said parameter (Eq) determined by said step of determining.

2. The method according to claim 1, wherein said criterion comprises at least one of:

a set of said determined parameters (Eq) in respect of a set of said processing procedures;

a set of initial sizes of input blocks in respect of a set of said processing procedures; and

a set of initial sizes of input blocks in respect of a set of said processing procedures for one and a same multiplexing frame.

3. The method according to claim 1, comprising:

at least said second entity calculating, for each processing procedure, a matching ratio (Sq) as a function of said parameter (Eq);

at least said second entity calculating a plurality of calculated intermediate sizes (Y′

i) of output blocks of a multiplexing frame; and

said second entity selecting a selected maximum payload (Njsel) from among a set of available maximum payloads for said multiplexing frame as a function of said plurality of calculated intermediate sizes (Y′

i).

4. The method according to claim 3, comprising:

at least said second entity calculating said final size (Yi) according to a function of said selected maximum payload (Njsel) and of said plurality of calculated intermediate sizes (Y′

i), so that a sum of final sizes of said output blocks of said multiplexing frame is equal to said selected maximum payload (Njsel).

5. The method according to claim 3, comprising:

at least said second entity calculating an aggregate size (Zi) as a function of said plurality of calculated intermediate sizes (Y′

i) corresponding to a function for rounding a product of said selected maximum payload (Njsel) and a ratio of a partial sum of said plurality of calculated intermediate sizes $\left(\underset{m=1}{\overset{i}{\sum <br><br>}}<br><br>\text{\hspace{1em}<br><br>}<br><br>Y^{\mathrm{\prime <br><br>}}<br><br>m\right)$

over a total sum of said plurality of calculated intermediate sizes $\left(\underset{m=1}{\overset{l}{\sum <br><br>}}<br><br>\text{\hspace{1em}<br><br>}<br><br>Y^{\mathrm{\prime <br><br>}}<br><br>m\right).$

6. The method according to claim 5, comprising:

at least said second entity calculating said final size (Yi) according to a function of a plurality of aggregate sizes (Zi) corresponding to a difference of two successive aggregate sizes.

7. The method according to claim 1, comprising:

calculating, for each of said processing procedures, said rate matching ratio of (Yi/Xi) as a product of said parameter (Eq) and of an extremum of a function dependent on said parameter (Eq).

8. The method according to claim 5, wherein said selected maximum payload (Njsel) is a smallest available maximum payload.

9. The method according to claim 3, comprising:

calculating, for each of said processing procedures, an intermediate matching ratio of (Y′

i/Xi) as a product of said parameter (Eq) and of an extremum of a function dependent on said parameter (Eq).

10. The method according to claim 9, comprising:

defining a maximum puncturing rate of (Pq/PBASE) for each of said processing procedures, and

setting said function dependent on said parameter (Eq) equal, to within a multiplicative constant, to a ratio of a difference between 1 and a maximum puncture rate of (Pq/PBASE) over said parameter (Eq), said maximum puncture rate of (Pq/PBASE) being specific to each of said processing procedures.

11. The method of claim 1, comprising:

exchanging information between said first entity and said second entity of said telecommunication system during an establishment of a communication link from said second entity to said first entity, comprising,

said first entity identifying a maximum sending capacity of said second entity,

said first entity determining, for each processing procedure, a value representative of a rate matching ratio of (Yi/Xi) specific to said processing procedure as a function of said maximum sending capacity of said second entity, and

said first entity transmitting to said second entity a set of values representative of rate matching ratios (Yi/Xi) for all said processing procedures; and

at least said second entity determining said rate matching ratios (Yi/Xi) for all said processing procedures as a function of values received from said first entity.

12. A base station configured to communicate data with a mobile station via a plurality of transport channels grouped together within a composite of transport channels, comprising:

a plurality of processing modules, each processing module configured to determine, for each transport channel of said plurality of transport channels, a parameter (Eq) representative of a rate matching ratio of (Yi/Xi), said rate matching ratio being used by a rate matching apparatus in said mobile station for transforming an input block of an initial size (Xi) into an output block of a final size (Yi); and

a transmission apparatus configured to transmit said parameter (Eq) to said mobile station for each transport channel of said plurality of transport channels.

13. A mobile station configured to communicate data via a plurality of transport channels grouped together within a composite of transport channels, comprising:

a rate matching apparatus for transforming an input block of an initial size (Xi) into an output block of a final size (Yi) in accordance with a rate matching ratio of (Yi/Xi) for each transport channel of said plurality of transport channels;

a receiving apparatus configured to receive a parameter (Eq) representative of said rate matching ratio of (Yi/Xi) for each transport channel of said plurality of transport channels; and

a plurality of processing modules, each processing module configured to calculate said final size (Yi) as a function of said initial size (Xi) of said input block and said parameter (Eq) for each transport channel of said plurality of transport channels.

14. The mobile station according to claim 13, comprising:

said plurality of processing modules configured to calculate a plurality of final sizes (Ym) for said plurality of transport channels so that a sum of said plurality of final sizes $\left(\underset{m=1}{\overset{l}{\sum <br><br>}}<br><br>\text{\hspace{1em}<br><br>}<br><br>Y<br><br>\text{\hspace{1em}<br><br>}<br><br>m\right)$

is equal to a maximum payload (Njsel) of a multiplexing frame.

15. The mobile station according to claim 14, comprising:

said plurality of processing modules configured to calculate said plurality of final sizes (Ym) so that said plurality of final sizes varies in accordance with said maximum payload (Njsel) of said multiplexing frame.

16. The mobile station according to claim 13, comprising:

said plurality of processing modules, each processing module configured to calculate a multiplication of said initial size (Xi) determined in said mobile station and said parameter (Eq) for each transport channel of said plurality of transport channels.

17. The mobile station according to claim 13, comprising:

said plurality of processing modules configured to calculate a set of available sizes for a multiplexing frame, to select a maximum payload (Njsel) from among said set, and each processing module of said plurality of processing modules configured to calculate said final size (Yi) as a function of said initial size (Xi), said parameter (Eq), and said maximum payload (Njsel) of said multiplexing frame for each transport channel of said plurality of transport channels.