Up link macro diversity method and apparatus in a digital mobile radio communication system

• US 5,867,791 A
• Filed: 05/23/1997
• Issued: 02/02/1999
• Est. Priority Date: 12/08/1994
• Status: Expired due to Term

• Current Assignee: Unwired Planet LLC (JP Morgan Chase & Co)
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Chambert, George
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): AOKI, MAKOTO
• Application Number:
  US08/836,925
• Time in Patent Office: 620 Days
• Field of Search: 455/436, 455/438, 455/439, 455/442, 455/443, 455/444, 455/560, 455/561, 455/524, 455/525, 370/331, 370/332, 370/333
• US Class Current: 455/525
• CPC Class Codes: H04B 7/022 Site diversity; Macro-diversity using two or more spaced independent antennas H04B7/04
• CPC Class Codes: H04L 1/06 using space diversity
• CPC Class Codes: H04W 52/386 centralized, e.g. when the radio network controller or equivalent takes part in the power control
• CPC Class Codes: H04W 92/12 between access points and access point controllers

Abstract

A digital cellular mobile radio communication system includes a mobile station transmitting an information block and a set of base stations receiving information blocks corresponding to the transmitted information block at each base station in the set. This communication system contains an up link macro diversity system with a device in each base station for determining a quality measure representing the reliability of each respective received information block, and a decision device for choosing the received information block with the best quality measure as a common output information block of the set of base stations.

Claims

1. An up link macro diversity method in a digital cellular mobile radio communication system, comprising the steps of

transmitting an information block from a mobile station;

receiving information blocks corresponding to said transmitted information block at each base station of a predetermined set of base stations;

determining, at each base station in said set, a quality measure representing the reliability of each respective received information block;

selecting the best quality measure; and

ordering only the base station corresponding to said best quality measure to output its received information block as a common output information block of said set of base stations.

2. The method of claim 1, further comprising the steps of:

sending the quality measure from each base station to a decision means; and

determining the best quality measure in said decision means.

3. An up link macro diversity method in a digital cellular mobile radio communication system, comprising the steps of

transmitting an information block from a mobile station;

receiving information blocks corresponding to said transmitted information block at each base station of a predetermined set of base stations;

determining, at each base station in said set, a quality measure representing the reliability of each respective received information block;

determining a subset of quality measures containing only the best quality measures;

ordering only base stations corresponding to said subset of best quality measures to output their respective received information block; and

combining said output information blocks into a common output information block of said set of base stations.

4. An up link macro diversity system in a digital cellular mobile radio communication system having a mobile station for transmitting an information block and a set of base stations for receiving information blocks corresponding to said transmitted information block at each base station in said set, said diversity system comprising:

means in each base station of said set for determining a quality measure representing the reliability of each respective received information block;

decision means for selecting the best quality measure and ordering only the base station corresponding to said best quality measure to output its received information block as a common output information block of said set of base stations.

5. The diversity system of claim 4, wherein said decision means is connected to each base station in said set for receiving said quality measures and determining the best quality measure.

6. The diversity system of claim 4, wherein the decision means is provided in a mobile services switching center (MSC).

7. An up link macro diversity system in a digital cellular mobile radio communication system having a mobile station for transmitting an information block and a set of base stations for receiving information blocks corresponding to said transmitted information block at each base station in said set, said diversity system comprising:

means in each base station of said set for determining a quality measure representing the reliability of each respective received information block;

means for determining a subset of quality measures containing only the best quality measures;

means for ordering only base stations corresponding to said subset of best quality measures to output their respective received information block; and

means for combining said output information blocks into a common output information block of said set of base stations.