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1. WO2000031991 - PROCEDE ET SYSTEME DE COMMUNICATIONS COMPRENANT LA REATTRIBUTION AUTOMATIQUE DES UNITES D'ABONNES

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

WHAT IS CLAIMED IS:
1. In a fixed radio communication system, a method of automatically reallocating a terminal located in a first radio domain to a second radio domain comprising the steps of:
transmitting a first code to the terminal, wherein the first code uniquely identifies the second radio domain;
in response to the first code, directing an antenna associated with the terminal in the direction corresponding to the second radio domain; and
adding a second code that uniquely identifies the terminal to a subscriber list associated with the second radio domain.

2. The method of Claim 1, further comprising the step of:
removing the second code that uniquely identifies the terminal from a subscriber list associated with the first radio domain.

3. The method of Claim 1 , further comprising the step of:
altering a subscriber list associated with the first radio domain so that the subscriber list associated with the first radio domain indicates that the terminal is inactive with respect to the first radio domain.

4. The method of Claim 1, wherein said step of directing an antenna associated with the terminal in a direction corresponding to the second radio domain comprises the step of:
redirecting radio frequency energy toward the second radio domain.

5. The method of Claim 1, further comprising the steps of:
deriving one or more signal quality factor values for each of a plurality of communications channels associated with the second radio domain;

comparing the signal quality factor values corresponding to the second radio domain with signal quality factor values corresponding to the first radio domain;
determining whether the signal quality factor values associated with the second domain are better than the signal quality factor values associated with the first radio domain; and
if the signal quality factor values associated with the second domain are superior to the signal quality factor values associated with the first radio domain, then initiating a reallocation of the terminal from the first radio domain to the second radio domain.

6. The method of Claim 5, wherein each of the plurality of communications channels associated with the second radio domain is defined by a frequency carrier, a time slot, a radio station, a radio domain and an antenna scan angle.

7. The method of Claim 5, wherein if the signal quality factor values associated with the second radio domain are not superior to the signal quality factor values associated with the first radio domain, then transmitting a signal from the terminal indicating that said terminal will not reallocate from the first radio domain to the second radio domain.

8. In a radio local loop (RLL) communications system, a method for automatically reallocating a fixed subscriber unit (FSU) from a first radio domain in said RLL system to a second radio domain in said RLL system, said method comprising the steps of:
sending a first code to the FSU, wherein the first code uniquely identifies the second radio domain for the FSU;
in response to the first code, directing radio frequency energy associated with the FSU in a direction towards the second radio domain;

varying a scan angle of the antenna, and at each of a plurality of antenna scan angles, deriving a signal quality value for each of a number of
communications channels, wherein each communications channel is defined by a frequency, a time slot, a radio station, a radio domain and the antenna scan angle; determining whether the second radio domain exhibits superior signal quality characteristics as compared to the first radio domain as a function of the derived signal quality values; and
if it is determined that the second radio domain exhibits superior signal quality characteristics as compared to the first radio domain, allocating the FSU to the second radio domain by adding a second code to a FSU subscriber list associated with the second radio domain, wherein the second code uniquely identifies the FSU.

9. The method of Claim 8, wherein said step of allocating the FSU to the second radio domain further comprises the step of:
removing the second code that uniquely identifies the FSU from a FSU subscriber list associated with the first radio domain.

10. The method of Claim 8, wherein said step of allocating the FSU to the second radio domain further comprises the step of:
altering a FSU subscriber list associated with the first radio domain so that the FSU subscriber list associated with the first radio domain indicates that the FSU is inactive with respect to the first radio domain.

11. The method of Claim 8, further comprising the steps of:
storing the signal quality values derived for each of the communications channels in a memory associated with the FSU; and comparing the signal quality values stored in the memory with signal quality values previously derived for communications channels corresponding to the first radio domain.

12. The method of Claim 8, wherein the second radio domain is a new radio domain that was incorporated into said RLL system as part of a system expansion.

13. An arrangement for a radio communication system, comprising:
a first radio domain;
a second radio domain; and
a terminal including a transmit and receive antenna through which the terminal communicates with the first radio domain, said terminal comprising:
means for varying a scan angle of the transmit and receive antenna such that radio frequency energy associated with said antenna can be directed toward the second radio domain so the terminal can communicate with said second radio domain.

14. The arrangement of Claim 13, further comprising:
means for determining a signal quality factor for each of a plurality of communication channels while the scan angle of the transmit and receive antenna is being varied.

15. The arrangement of Claim 14, further comprising:
means for comparing the signal quality factor associated with each of the plurality of communication channels.

16. The arrangement of Claim 14, further comprising:
means for dynamically selecting a communication channel over which the terminal is to communicate with said first and second radio domains as a function of the signal quality factor associated with each of the plurality of communication channels.

17. The arrangement of Claim 13, further comprising:
a first subscriber list associated with the first radio domain, the first subscriber list containing a code uniquely identifying a terminal which is active with respect to said first radio domain; and
a second subscriber list associated with the second radio domain, the second subscriber list containing a code uniquely identifying a terminal which is active with respect to said second radio domain.

18. The arrangement of Claim 17, further comprising:
means for altering the first and second subscriber lists such that a code uniquely identifying a terminal can be added or removed.

19. The arrangement of Claim 13, wherein the antenna associated with the terminal is a fixed antenna or a plurality of fixed antennas.