Virtual cell mapping in macrodiverse wireless networks with frequency hopping
First Claim
1. A communication system using wireless signals for communications including downlink signals to and uplink signals from mobile stations, comprising:
- a plurality of base stations to communicate with said mobile stations using said downlink signals and said uplink signals with frequency hopping sequences, andhopping sequence control means for controlling said frequency hopping sequences at two or more adjacent ones of said base stations whereby mobile stations in a region between said two or more adjacent ones of said base stations communicate with coordinated orthogonal frequency hopping sequences,wherein,each of said base stations to operate with three or more sector,said hopping sequence control means to control two or more adjacent ones of said sectors for adjacent ones of said base stations, respectively, to have said coordinated orthogonal frequency hopping sequences, anda virtual cell is formed by at least three adjacent sectors of at least three adjacent base stations, respectively, wherein said coordinated orthogonal frequency hopping sequences is used for said at least three adjacent sectors.
6 Assignments
0 Petitions
Accused Products
Abstract
A communication system for communication with mobile stations through a plurality of base stations at macrodiverse locations and with frequency hopping (FH). Two or more adjacent base stations communicate with mobile stations in a region between the adjacent base stations using coordinated orthogonal frequency hopping sequences. The communication system operates with virtual cells formed of physical sectors from adjacent base stations. Where base stations each operate with three sectors, virtual cells use three adjacent sectors of three adjacent base stations, respectively, and the coordinated orthogonal frequency hopping sequences are used for the adjacent sectors of each of the virtual cells. For GSM, the coordinated orthogonal frequency hopping sequences in each virtual cell are defined by a single hopping sequence number (HSN) and a set of mobile allocation index offsets (MAIOs). Fast macrodiversity switching is employed in combination with FH.
110 Citations
28 Claims
-
1. A communication system using wireless signals for communications including downlink signals to and uplink signals from mobile stations, comprising:
-
a plurality of base stations to communicate with said mobile stations using said downlink signals and said uplink signals with frequency hopping sequences, and hopping sequence control means for controlling said frequency hopping sequences at two or more adjacent ones of said base stations whereby mobile stations in a region between said two or more adjacent ones of said base stations communicate with coordinated orthogonal frequency hopping sequences, wherein, each of said base stations to operate with three or more sector, said hopping sequence control means to control two or more adjacent ones of said sectors for adjacent ones of said base stations, respectively, to have said coordinated orthogonal frequency hopping sequences, and a virtual cell is formed by at least three adjacent sectors of at least three adjacent base stations, respectively, wherein said coordinated orthogonal frequency hopping sequences is used for said at least three adjacent sectors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15)
-
-
11. A communication system using wireless signals for communications including downlink signals to and uplink signals from mobile stations, comprising:
-
a plurality of base stations to communicate with said mobile stations using said downlink signals and said uplink signals with frequency hopping sequences, and hopping sequence control means for controlling said frequency hopping sequences at two or more adjacent ones of said base stations whereby mobile stations in a region between said two or more adjacent ones of said base stations communicate with coordinated orthogonal frequency hopping sequences; wherein each of said base stations includes a base station manager comprising; a macrodiversity processor for processing modules including fast macrodiversity switching means, hopping management means and timing means, a database for storing hopping sequence numbers and sets of mobile allocation index offsets, resource and airlink control means for controlling downlink signals to said mobile stations and for controlling uplink signals from said mobile stations, and interface means for interfacing communications among said base stations and the hopping sequence control means.
-
-
16. A communication system usinig wireless signals for communications including downlink signals to and unlink signals from mobile station, comprising:
-
a plurality of base stations to communicate with said mobile stations using said downlink signals and said uplink signals with frequency hopping sequences, and hopping sequence control means for controlling said frequency hopping sequences at two or more adjacent ones of said base stations whereby mobile stations in a region between said two or more adjacent ones of said base stations communicate with coordinated orthogonal frequency hopping sequences; each of said base stations operates with SS physical sectors, b1s(s1), b2sS(s2), . . . , bBS(SS) formed of B physical antennas and components, virtual cells are formed by sectors from different base stations served by virtual base stations VBS, defined by the following Exp. (1);
L[b]VBS[b1S(s1), b2S(s2), . . . , bBS(SS);
;
L[b]HS;
;
L[b]MAIO{kb}]
Exp. (1)
where;L[b]VBS is the L(b)th one of virtual base stations, VBS, L[b]HS is a hopping sequence number assigned to the L[b]VBS virtual base station, L[b]MAIO{kb} is a set of Mobile Allocation Index Offsets (MAIO) available for assignment to mobile stations for the particular hopping sequence assigned to the L[b]VBS virtual base station.
-
-
17. In a communication system using wireless signals for communications including downlink signals to and uplink signals from mobile stations, the method comprising:
-
communicating with said mobile stations with a plurality of base stations using said downlink signals and said uplink signals, managing the base station frequencies of communications with said mobile stations according to frequency hopping sequences, and controlling the frequency hopping sequences for two or more adjacent ones of said base stations to have mobile stations in a region between said two or more adjacent ones of said base stations commnunicate with coordinated orthogonal frequency hopping sequences, wherein said managing the base station frequencies is distributed in each of said base stations. - View Dependent Claims (18, 19, 20, 24, 25, 26, 27, 28)
-
-
21. In a communication system using wireless signals for communications including downlink signals to and unlink signals from mobile stations, the method comprising:
-
communicating with said mobile stations with a plurality of base stations using said downlink signals and said uplink signals, managing the base station frequencies of communications with said mobile stations according to frequency hopping sequences, and controlling the frequency hopping sequences for two or more adjacent ones of said base stations to have mobile stations in a region between said two or more adjacent ones of said base stations communicate with coordinated orthogonal frequency hopping sequences, each of said base stations operates with a three or more sectors, two or more adjacent ones of said sectors for adjacent ones of said base stations, respectively, have said coordinated orthogonal frequency hopping sequences, and three adjacent sectors of three adjacent base stations, respectively, are controlled to form a virtual cell wherein said coordinated orthogonal frequency hopping sequences are used for said three adjacent sectors. - View Dependent Claims (22, 23)
-
Specification