CA2256409A1 - Method and apparatus for providing diversity in hard handoff for a cdma system - Google Patents
Method and apparatus for providing diversity in hard handoff for a cdma systemInfo
- Publication number
- CA2256409A1 CA2256409A1 CA002256409A CA2256409A CA2256409A1 CA 2256409 A1 CA2256409 A1 CA 2256409A1 CA 002256409 A CA002256409 A CA 002256409A CA 2256409 A CA2256409 A CA 2256409A CA 2256409 A1 CA2256409 A1 CA 2256409A1
- Authority
- CA
- Canada
- Prior art keywords
- antenna
- coverage area
- remote unit
- base station
- active communication
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims 44
- 238000004891 communication Methods 0.000 claims abstract 122
- 230000003111 delayed effect Effects 0.000 claims abstract 13
- 238000005516 engineering process Methods 0.000 claims 5
- 238000001228 spectrum Methods 0.000 claims 5
- 238000005562 fading Methods 0.000 claims 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000001934 delay Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
- H04B7/0671—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using different delays between antennas
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2603—Arrangements for wireless physical layer control
- H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/16—Deriving transmission power values from another channel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
- Radio Relay Systems (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
In a communications network, a network user communicates using a remote unit (125) with another user (30) via at least one base station (B1A). The communications network has a first base station (B1A) having a first coverage area and a second base station (B2A) having a second coverage area. In the situation where communication is not established between the second base station (B2A) and the remote unit (125), in order to provide communication between the remote unit (125) and the first base station (B1A) when the remote unit (125) is in the first coverage and simultaneously in the second coverage area, the first base station (B1A) produces a first active communication signal as intended for the remote unit (125). The first base station transmits the first active communication signal from a first antenna (130). The base station delays the first active communication signal to produce a first delayed active communication signal and transmits it from a second antenna (135) wherein the second antenna (135) is oriented with respect to the first antenna (130) such that the first active communication signal and the first delayed active communication signal fade independently as perceived by the remote unit. The first base station (B1A) may measure a round trip delay of the first active communication signal in order to identify that the remote unit (125) is located within the second coverage area.
Claims (81)
1. In a communications network in which a network user communicates using a remote unit with another user via at least one base station, said communications network including a first base station having a first coverage area and a second base station having a second coverage area, a method for providing communications between said remote unit and said first base station when said remote unit is in said first coverage and simultaneously in said second coverage area and wherein communication is not established between said second base station and said remote unit, comprising the steps of:
producing a first active communication signal at said first base station intended for said remote unit;
transmitting from said first base station said first active communication signal from a first antenna;
delaying said first active communication signal to produce a first delayed active communication signal;
transmitting from said first base station said first delayed active communication signal from a second antenna wherein said second antenna is configured such that said first active communication signal and said first delayed active communication signal fade independently as perceived by said remote unit;
producing a second set of active communication signals at said second base station none of which are intended for said remote unit; and transmitting from said second base station said second set of active communication signals.
producing a first active communication signal at said first base station intended for said remote unit;
transmitting from said first base station said first active communication signal from a first antenna;
delaying said first active communication signal to produce a first delayed active communication signal;
transmitting from said first base station said first delayed active communication signal from a second antenna wherein said second antenna is configured such that said first active communication signal and said first delayed active communication signal fade independently as perceived by said remote unit;
producing a second set of active communication signals at said second base station none of which are intended for said remote unit; and transmitting from said second base station said second set of active communication signals.
2. The method of Claim 1:
wherein said first active communication signal is a spread spectrum signal which is spread with a series of pseudorandom noise chips each chip of which has a fixed duration; and wherein in said step of delaying, said first active signal is delayed by at least said fixed duration.
wherein said first active communication signal is a spread spectrum signal which is spread with a series of pseudorandom noise chips each chip of which has a fixed duration; and wherein in said step of delaying, said first active signal is delayed by at least said fixed duration.
3. The method of Claim 2 wherein said second set of active communication signals is modulated in an alternative communication technology.
4. The method of Claim 1 further comprising the step of transmitting said first active communication signal at an increased level compared to a set of other active signals transmitted from said first antenna because said remote unit is located in said second coverage area.
5. The method of Claim 1 further comprising the step of measuring at said first base station a round trip delay of said first active communication signal in order to identify that said remote unit is located in said second coverage area.
6. The method of Claim 1 further comprising the steps of:
measuring at said remote unit a signal level of said first active communication signal;
reporting by said remote unit said signal level to said first base station;
and determining from said signal level that said remote unit is located in said second coverage area.
measuring at said remote unit a signal level of said first active communication signal;
reporting by said remote unit said signal level to said first base station;
and determining from said signal level that said remote unit is located in said second coverage area.
7. The method of Claim 1 wherein said second antenna is located near or within said second coverage area and is not located at said base station.
8. The method of Claim 1 wherein said second antenna is a highly directional spot antenna having a coverage area located near or within said second coverage area.
9. The method of Claim 1 wherein said step of transmitting from said first base station said first delayed active communication signal from said second antenna is performed only when at least one remote unit is located near said second coverage area.
10. The method of Claim 1 wherein said first delayed active communication signal is transmitted from said second antenna at a lower power level than said first active communication signal.
11. The method of Claim 10 wherein said second antenna is a highly directional spot antenna having a coverage area located near or within said second coverage area.
12. The method of Claim 10 wherein said step of transmitting from said first base station said first delayed active communication signal from saidsecond antenna is performed only when at least one remote unit is located near said second coverage area.
13. The method of Claim 12 wherein said second antenna is a highly directional spot antenna having a coverage area located near or within said second coverage area.
14. In a communications network in which a network user communicates using a remote unit with another user via at least one base station, said communications network including a first base station having a first coverage area and a second base station having a second coverage area, a method for providing communications between said remote unit and said first base station when said remote unit is in said first coverage and simultaneously in said second coverage area and wherein communication is not established between said second base station and said remote unit, comprising the steps of:
producing a first active communication signal at said first base station intended for said remote unit;
transmitting from said first base station said first active communication signal from a first antenna;
transmitting from said first base station said first active communication signal from a second antenna;
coupling together said first and second antennas to create said first coverage area; and changing over time the phase of said second antenna relative to the phase of a first antenna at a rate sufficient to reduce a signal fading loss perceived by said remote unit;
producing a second set of active communication signal at said second base station none of which are intended for said remote unit; and transmitting from said second base station said second set of active communication signals.
producing a first active communication signal at said first base station intended for said remote unit;
transmitting from said first base station said first active communication signal from a first antenna;
transmitting from said first base station said first active communication signal from a second antenna;
coupling together said first and second antennas to create said first coverage area; and changing over time the phase of said second antenna relative to the phase of a first antenna at a rate sufficient to reduce a signal fading loss perceived by said remote unit;
producing a second set of active communication signal at said second base station none of which are intended for said remote unit; and transmitting from said second base station said second set of active communication signals.
15. The method of Claim 14:
wherein said first active communication signal is a spread spectrum signal; and wherein said second set of active communication signals is modulated in an alternative communication technology.
wherein said first active communication signal is a spread spectrum signal; and wherein said second set of active communication signals is modulated in an alternative communication technology.
16. The method of Claim 14 further comprising the step of transmitting said first active communication signal at an increased level compared to a set of other active signals transmitted from said first antenna because said remote unit is located in said second coverage area.
17. The method of Claim 14 further comprising the step of measuring at said first base station a round trip delay of said first active communicationsignal in order to identify that said remote unit is located in said second coverage area.
18. The method of Claim 14 further comprising the steps of:
measuring at said remote unit a signal level of said first active communication signal;
reporting by said remote unit said signal level to said first base station;
and determining from said signal level that said remote unit is located in said second coverage area.
measuring at said remote unit a signal level of said first active communication signal;
reporting by said remote unit said signal level to said first base station;
and determining from said signal level that said remote unit is located in said second coverage area.
19. The method of Claim 14 wherein said second antenna is a highly directional spot antenna having a coverage area located near or within said second coverage area.
20. The method of Claim 14 further comprising the step of transmitting from said second antenna a pilot signal only when at least one remote unit is located within said second coverage area.
21. The method of Claim 14 further comprising the step of transmitting said first delayed active communication signal from said second antenna at a lower power level than said first active communication signal.
22. The method of Claim 14 further comprising the step of transmitting said second active communication signal from said second antenna only if said remote unit is located in said second coverage area.
23. The method of Claim 14 further comprising the step of transmitting from said second antenna a pilot signal.
24. The method of Claim 23 further comprising the step of transmitting from said first base station from said second antenna a page and sync channel signal.
25. The method of Claim 23 further comprising the step of transmitting said pilot signal from said second antenna at a different PN offset than a firstpilot signal transmitted from said first antenna.
26. In a communications network in which a network user communicates using a remote unit with another user via at least one base station, said network including a first base station having a first coverage area and a second base station having a second coverage area, a method for providing communications between said remote unit and said first base station when said remote unit is in said first coverage and simultaneously in said second coverage area and wherein communication is not established between said second base station and said remote unit, comprising the steps of:
producing a first active communication signal at said first base station intended for said remote unit;
transmitting from said first base station said first active communication signal from a first antenna;
producing a second active communication signal at said first base station intended for said remote unit;
transmitting from said first base station said second active communication signal from a second antenna wherein said second antenna is such that said first active communication signal and said second active communication signal fade independently as perceived by said remote unit and are separately receivable by said remote unit;
producing a set of active communication signal at said second base station none of which are intended for said remote unit; and transmitting from said second base station said set of active communication signals.
producing a first active communication signal at said first base station intended for said remote unit;
transmitting from said first base station said first active communication signal from a first antenna;
producing a second active communication signal at said first base station intended for said remote unit;
transmitting from said first base station said second active communication signal from a second antenna wherein said second antenna is such that said first active communication signal and said second active communication signal fade independently as perceived by said remote unit and are separately receivable by said remote unit;
producing a set of active communication signal at said second base station none of which are intended for said remote unit; and transmitting from said second base station said set of active communication signals.
27. The method of Claim 26:
wherein said first active communication signal is a spread spectrum signal which is spread with a series of pseudorandom noise chips each chip of which has a fixed duration; and wherein said first and second active signals are separately receivable by said remote unit because said second active signal is offset in time from said first active signal by at least said fixed duration.
wherein said first active communication signal is a spread spectrum signal which is spread with a series of pseudorandom noise chips each chip of which has a fixed duration; and wherein said first and second active signals are separately receivable by said remote unit because said second active signal is offset in time from said first active signal by at least said fixed duration.
28. The method of Claim 26 wherein said set of active communication signals is modulated using time division multiple access.
29. The method of Claim 26 wherein said set of active communication signals is modulated using code division multiple access.
30. The method of Claim 26 wherein said set of active communication signals is frequency modulated.
31. The method of Claim 26 further comprising the step of transmitting said second active communication signal because said remote unit is located in said second coverage area.
32. The method of Claim 31 further comprising the step of measuring at said first base station a round trip delay of said first active communicationsignal in order to identify that said remote unit is located in said second coverage area.
33. The method of Claim 31 further comprising the steps of:
measuring at said remote unit a signal level of said first active communication signal; and reporting by said remote unit said signal level to said first base station in order to identify that said remote unit is located in said second coverage area.
measuring at said remote unit a signal level of said first active communication signal; and reporting by said remote unit said signal level to said first base station in order to identify that said remote unit is located in said second coverage area.
34. The method of Claim 26 wherein said second antenna is located within said second coverage area.
35. The method of Claim 26 wherein said second antenna is a highly directional spot antenna having a coverage area located near or within said second coverage area.
36. The method of Claim 26 further comprising the step of transmitting said first delayed active communication signal from said second antenna at a lower power level than said first active communication signal.
37. The method of Claim 36 wherein said second antenna is a highly directional spot antenna having a coverage area located near or within said second coverage area.
38. The method of Claim 36 wherein said step of transmitting from said first base station said first delayed active communication signal from saidsecond antenna is performed only when at least one remote unit is located near said second coverage area.
39. The method of Claim 38 wherein said second antenna is a highly directional spot antenna having a coverage area located near or within said second coverage area.
40. The method of Claim 26 further comprising the step of transmitting from said second antenna a pilot signal only when at least one remote unit is located within said second coverage area.
41. The method of Claim 26 further comprising the step of transmitting from said second antenna a pilot signal.
42. The method of Claim 41 further comprising the step of transmitting from said first base station from said second antenna a page and sync channel signal.
43. The method of Claim 41 wherein said pilot signal transmitted from said second antenna has a different PN offset than a first pilot signal transmitted from said first antenna.
44. A communications network comprising:
a first active base station defining a first coverage area comprising:
a first antenna producing a first active communication signal;
a second antenna producing a second active communication signal;
a delay line interposed between said first and said second antennas such that said second active communication signal is offset in time with respect to said first active communication signal;
a second target base station defining a second coverage area and producing a set of communication signals; and a remote unit located within said first and second coverage areas and receiving said first and second active communications signals.
a first active base station defining a first coverage area comprising:
a first antenna producing a first active communication signal;
a second antenna producing a second active communication signal;
a delay line interposed between said first and said second antennas such that said second active communication signal is offset in time with respect to said first active communication signal;
a second target base station defining a second coverage area and producing a set of communication signals; and a remote unit located within said first and second coverage areas and receiving said first and second active communications signals.
45. The apparatus of Claim 44:
wherein said first and second active communication signals are spread spectrum signals which are spread with a series of pseudorandom noise chips each chip of which has a fixed duration; and wherein in said first active signal is offset from said second active communication signal by at least said fixed duration.
wherein said first and second active communication signals are spread spectrum signals which are spread with a series of pseudorandom noise chips each chip of which has a fixed duration; and wherein in said first active signal is offset from said second active communication signal by at least said fixed duration.
46. The apparatus of Claim 44 wherein said set of communication signals is modulated in an alternative communication technology.
47. The apparatus of Claim 44 wherein said second active communication signal is transmitted from said second antenna because said remote unit is located in said first and second coverage areas.
48. The apparatus of Claim 47 wherein said first active base station measures a round trip delay of said first active communication signal in order to identify that said remote unit is located in said second coverage area.
49. The apparatus of Claim 47 wherein said remote unit measures a signal level of said first active communication signal and reports said signal level to said first active base station in order to identify that said remote unit is located in said second coverage area.
50. The apparatus of Claim 44 wherein said second antenna is located near or within said second coverage and is not collocated with said first activebase station.
51. The apparatus of Claim 44 wherein said second antenna is a highly directional spot antenna having a coverage area located near or within said second coverage area.
52. The apparatus of Claim 44 wherein said second antenna produces said second active communication signal only when at least one remote unit is located near or within said second coverage area.
53. The apparatus of Claim 44 wherein said second active communication signal is transmitted at a lower power level than said first active communication signal.
54. The apparatus of Claim 53 wherein said second antenna is a highly directional spot antenna having a coverage area located near or within said second coverage area.
55. The apparatus of Claim 53 wherein said second active communication signal is produced by said second antenna is performed only when at least one remote unit is located near said second coverage area.
56. The apparatus of Claim 55 wherein said second antenna is a highly directional spot antenna having a coverage area located near or within said second coverage area.
57. A communications network comprising:
a first active base station defining a first coverage area comprising:
a transmitter creating a first set of communication signals comprising a first active communication signal and creating a second set of communication signals comprising a second active communication signal;
a first antenna radiating said first set of communication signals;
a second antenna radiating said second set of communication signals;
a second target base station defining a second coverage area and producing a third set of communication signals; and a remote unit located within said first and second coverage areas and receiving said first and second active communications signals.
a first active base station defining a first coverage area comprising:
a transmitter creating a first set of communication signals comprising a first active communication signal and creating a second set of communication signals comprising a second active communication signal;
a first antenna radiating said first set of communication signals;
a second antenna radiating said second set of communication signals;
a second target base station defining a second coverage area and producing a third set of communication signals; and a remote unit located within said first and second coverage areas and receiving said first and second active communications signals.
58. The apparatus of Claim 57:
wherein said first and second active communication signals are spread spectrum signals which are spread with a series of pseudorandom noise chips each chip of which has a fixed duration; and wherein said first active signal is delayed by at least said fixed duration.
wherein said first and second active communication signals are spread spectrum signals which are spread with a series of pseudorandom noise chips each chip of which has a fixed duration; and wherein said first active signal is delayed by at least said fixed duration.
59. The apparatus of Claim 57 wherein said third set of communication signals is modulated in an alternative communication technology.
60. The apparatus of Claim 57 wherein said second active communication signal is transmitted from said second antenna because said remote unit is located in said first and second coverage areas.
61. The apparatus of Claim 60 wherein said first active base station measures a round trip delay of said first active communication signal in order to identify that said remote unit is located in said second coverage area.
62. The apparatus of Claim 60 wherein said remote unit measures a signal level of said first active communication signal and reports said signal level to said active first base station in order to identify that said remote unit is located in said second coverage area.
63. The apparatus of Claim 57 wherein said second antenna is located near or within said second coverage and is not collocated with said first activebase station
64. The apparatus of Claim 57 wherein said second antenna is a highly directional spot antenna having a coverage area located near or within said second coverage area.
65. The apparatus of Claim 57 wherein said second set of communication signals is radiated from said second antenna when at least one remote unit is located within said second coverage area.
66. The apparatus of Claim 57 wherein said second set of communication signals are radiated from said second antenna at a lower power level than said first set of communication signals are radiated from said first antenna.
67. The apparatus of Claim 66 wherein said second antenna is a highly directional spot antenna having a coverage area located near or within said second coverage area.
68. The apparatus of Claim 66 wherein said second set of communication signals are radiated from said second antenna only when at least one-remote unit is located near said second coverage area.
69. The apparatus of Claim 68 wherein said second antenna is a highly directional spot antenna having a coverage area located near or within said second coverage area.
70. The apparatus of Claim 57 wherein said second antenna transmits a pilot signal only when at least one remote unit is located within said second coverage area.
71. The apparatus of Claim 57 wherein said second active communication signal is radiated from said second antenna only if said remote unit is located in said second coverage area.
72. The apparatus of Claim 57 wherein said second antenna radiates a pilot signal.
73. The apparatus of Claim 57 wherein said first base station from said second antenna radiates a page and sync channel signal.
74. The apparatus of Claim 57 wherein said pilot signal transmitted from said second antenna has a different PN offset than a first pilot signal transmitted from said first antenna.
75. A communications network comprising:
a first active base station defining a first coverage area comprising:
a first antenna producing a first active communication signal;
a second antenna producing a second active communication signal; and a phase vacillation mechanism interposed between said first and said second antennas such as to reduce signal fading loss perceived within said first coverage area;
a second target base station defining a second coverage area and producing a set of communication signals; and a remote unit located within said first and second coverage areas and receiving said first and second active communications signals.
a first active base station defining a first coverage area comprising:
a first antenna producing a first active communication signal;
a second antenna producing a second active communication signal; and a phase vacillation mechanism interposed between said first and said second antennas such as to reduce signal fading loss perceived within said first coverage area;
a second target base station defining a second coverage area and producing a set of communication signals; and a remote unit located within said first and second coverage areas and receiving said first and second active communications signals.
76. The apparatus of Claim 75 wherein said set of communication signals is modulated in an alternative communication technology.
77. The apparatus of Claim 75 wherein said second active communication signal is transmitted from said second antenna because said remote unit is located in said first and second coverage areas.
78. The apparatus of Claim 77 wherein said first active base station measures a round trip delay of said first active communication signal in order to identify that said remote unit is located in said second coverage area.
79. The apparatus of Claim 77 wherein said remote unit measures a signal level of said first active communication signal and reports said signal level to said active first base station in order to identify that said remote unit is located in said second coverage area.
80. The apparatus of Claim 77 wherein said second active communication signal is radiated from said second antenna when at least one remote unit is located within said second coverage area.
81. The apparatus of Claim 77 wherein said second active communication signal are radiated from said second antenna at a lower power level than said first set of communication signals are radiated from said first antenna.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/651,430 US5926470A (en) | 1996-05-22 | 1996-05-22 | Method and apparatus for providing diversity in hard handoff for a CDMA system |
US08/651,430 | 1996-05-22 | ||
PCT/US1997/008671 WO1997044983A2 (en) | 1996-05-22 | 1997-05-22 | Method and apparatus for providing diversity in hard handoff for a cdma system |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2256409A1 true CA2256409A1 (en) | 1997-11-27 |
CA2256409C CA2256409C (en) | 2011-08-02 |
Family
ID=24612837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2256409A Expired - Fee Related CA2256409C (en) | 1996-05-22 | 1997-05-22 | Method and apparatus for providing diversity in hard handoff for a cdma system |
Country Status (14)
Country | Link |
---|---|
US (1) | US5926470A (en) |
EP (1) | EP0900512B1 (en) |
JP (2) | JP4191249B2 (en) |
CN (1) | CN1158889C (en) |
AT (1) | ATE302535T1 (en) |
AU (1) | AU3209197A (en) |
BR (1) | BR9712090A (en) |
CA (1) | CA2256409C (en) |
DE (1) | DE69733997T2 (en) |
HK (1) | HK1018874A1 (en) |
IL (1) | IL127171A (en) |
TW (1) | TW361021B (en) |
WO (1) | WO1997044983A2 (en) |
ZA (1) | ZA974384B (en) |
Families Citing this family (100)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0872140B1 (en) * | 1995-08-31 | 2004-07-14 | Nokia Corporation | A method for selecting the way to perform a handover, and a cellular radio system |
JP3745459B2 (en) * | 1996-07-18 | 2006-02-15 | 富士通株式会社 | Communication method and communication apparatus for wireless LAN system |
JP4124499B2 (en) * | 1996-11-14 | 2008-07-23 | 富士通株式会社 | Method for performing soft handoff in mobile communication system, mobile communication system and radio base station therefor |
US5940761A (en) * | 1997-01-15 | 1999-08-17 | Qaulcomm Incorporated | Method and apparatus for performing mobile assisted hard handoff between communication systems |
US6359882B1 (en) * | 1997-04-01 | 2002-03-19 | Yipes Communications, Inc. | Method and apparatus for transmitting data |
KR100242421B1 (en) * | 1997-04-14 | 2000-02-01 | 윤종용 | Method for assigning pilot pn offset of digital mobile communication system |
US6628630B1 (en) * | 1997-04-15 | 2003-09-30 | Matsushita Electric Industrial Co., Ltd. | Spread spectrum communication method |
CN101031143B (en) * | 1997-04-24 | 2011-10-26 | 株式会社Ntt都科摩 | Method and system for mobile communications |
JP3370902B2 (en) * | 1997-06-03 | 2003-01-27 | 株式会社エヌ・ティ・ティ・ドコモ | Handover control method in mobile radio communication |
EP0935400B1 (en) * | 1997-06-04 | 2005-07-27 | NTT DoCoMo, Inc. | Mobile radio communication system, mobile station, and method for controlling diversity hand-over branch |
US6590878B1 (en) * | 1997-06-16 | 2003-07-08 | Mitsubishi Denki Kabushiki Kaisha | Mobile communication system with shared time slots and frequency channels |
US6330232B1 (en) * | 1997-07-16 | 2001-12-11 | Nortel Networks Limited | Base station transceiver subsystem carrier selection at a CDMA cell site |
JP2945357B2 (en) * | 1997-07-19 | 1999-09-06 | 松下電器産業株式会社 | Mobile station device and control station device of CDMA system |
GB9726912D0 (en) * | 1997-12-19 | 1998-02-18 | Advanced Communications Consul | Apparatus and method for detection of signals |
KR100277101B1 (en) * | 1998-02-17 | 2001-01-15 | 윤종용 | Method for performing hard handoff between central offices in code division multiple access network |
KR100308900B1 (en) * | 1998-05-13 | 2001-11-15 | 윤종용 | Hand-off apparatus and method of mobile communication system having time switched transmission deversity |
US6381235B1 (en) * | 1998-05-29 | 2002-04-30 | Lucent Technologies Inc. | Wireless CDMA system having a unique forward configuration control channel |
US6560210B1 (en) * | 1998-06-10 | 2003-05-06 | Lucent Technologies Inc. | Handing off a wireless terminal in a wireless telecommunications system |
JP3204310B2 (en) | 1998-08-12 | 2001-09-04 | 日本電気株式会社 | CDMA mobile communication system and downlink transmission power control method thereof |
US6771963B1 (en) * | 1998-08-17 | 2004-08-03 | Lucent Technologies Inc. | Triggering handdowns and handoffs of mobile stations between bordering cells of cellular wireless communication systems |
KR20000019105A (en) * | 1998-09-08 | 2000-04-06 | 정장호 | Hard handoff method between frequency assignments in cdma mobile communication system |
US6377608B1 (en) * | 1998-09-30 | 2002-04-23 | Intersil Americas Inc. | Pulsed beacon-based interference reduction mechanism for wireless communication networks |
US6259730B1 (en) | 1998-11-10 | 2001-07-10 | Lucent Technologies, Inc. | Transmit diversity and reception equalization for radio links |
US6411819B1 (en) * | 1998-11-19 | 2002-06-25 | Scoreboard, Inc. | Method of modeling a neighbor list for a mobile unit in a CDMA cellular telephone system |
JP2000184426A (en) * | 1998-12-16 | 2000-06-30 | Fujitsu Ltd | Base station equipment and base station controller |
US6539227B1 (en) * | 1998-12-18 | 2003-03-25 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and systems for controlling hard and soft handoffs in radio communications systems |
US6389298B1 (en) * | 1999-01-11 | 2002-05-14 | Lucent Technologies Inc. | Signaling to support wireless service redirection |
US6424834B1 (en) * | 1999-02-02 | 2002-07-23 | Nortel Networks Corporation | Precision hard handoff method using pilot beacon distributors |
JP3001570B1 (en) * | 1999-02-22 | 2000-01-24 | 埼玉日本電気株式会社 | Adaptive antenna directivity control method and system |
JP3448000B2 (en) * | 1999-03-16 | 2003-09-16 | 株式会社ハイニックスセミコンダクター | Method of extending communication area of mobile communication system and method of processing call between communication areas |
FI112583B (en) * | 1999-05-26 | 2003-12-15 | Nokia Corp | A method for implementing handover measurements between cellular radio systems and a terminal |
JP3293599B2 (en) * | 1999-07-28 | 2002-06-17 | 日本電気株式会社 | CDMA mobile communication system and inter-system handoff control method |
US6917597B1 (en) * | 1999-07-30 | 2005-07-12 | Texas Instruments Incorporated | System and method of communication using transmit antenna diversity based upon uplink measurement for the TDD mode of WCDMA |
US7236807B1 (en) | 1999-10-28 | 2007-06-26 | Celletra Ltd. | Cellular base station augmentation |
AU1170201A (en) * | 1999-10-28 | 2001-05-08 | Celletra Ltd. | Cellular base station augmentation |
JP3506072B2 (en) * | 1999-11-10 | 2004-03-15 | 日本電気株式会社 | CDMA mobile communication system and communication control method |
KR20030004326A (en) * | 2000-01-27 | 2003-01-14 | 셀레트라 리미티드 | Cellular base station augmentation system and method |
US7158484B1 (en) * | 2000-02-25 | 2007-01-02 | Lucent Technologies Inc. | Methods and apparatus for topology sensing in networks with mobile nodes |
DE60132078T2 (en) * | 2000-03-29 | 2008-12-24 | OpenCell Corp., Houston | OPERATING AND MAINTENANCE ARCHITECTURE FOR A DISTRIBUTED MULTIPROTOCOL SYSTEM |
AU2000243410A1 (en) * | 2000-04-11 | 2001-10-23 | Airnet Communications Corporation | Method and apparatus employing delay combining for receive diversity in a wireless system repeater |
US7130285B2 (en) * | 2000-04-12 | 2006-10-31 | Samsung Electronics Co., Ltd. | Method for providing concurrent service handoff in a mobile communication system |
US6826161B1 (en) | 2000-07-20 | 2004-11-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Slewing detector system and method for the introduction of hysteresis into a hard handoff decision |
US7123916B2 (en) * | 2000-07-25 | 2006-10-17 | Denso Corporation | Handoff adaptation for CDMA systems |
US7016331B1 (en) * | 2000-09-05 | 2006-03-21 | Cisco Technology, Inc. | Method of handoff control in an enterprise code division multiple access wireless system |
US6901061B1 (en) * | 2000-09-05 | 2005-05-31 | Cisco Technology, Inc. | Handoff control in an enterprise division multiple access wireless system |
US9130810B2 (en) | 2000-09-13 | 2015-09-08 | Qualcomm Incorporated | OFDM communications methods and apparatus |
US7295509B2 (en) | 2000-09-13 | 2007-11-13 | Qualcomm, Incorporated | Signaling method in an OFDM multiple access system |
US6694147B1 (en) * | 2000-09-15 | 2004-02-17 | Flarion Technologies, Inc. | Methods and apparatus for transmitting information between a basestation and multiple mobile stations |
CN1159931C (en) | 2000-10-02 | 2004-07-28 | 株式会社Ntt都科摩 | Mobile communication system, base mobile station, and method for controlling mobile communication |
US7054631B2 (en) * | 2000-10-23 | 2006-05-30 | Denso Corporation | Enhancement of soft handoff in a mobile wireless network through the use of dynamic information feedback from mobile users |
JP3479840B2 (en) * | 2000-11-22 | 2003-12-15 | 日本電気株式会社 | Mobile communication control method and system, and mobile station |
US7295536B2 (en) * | 2001-01-04 | 2007-11-13 | Ericsson Inc. | Systems and methods for soft handoff and other diversity communication using base stations supporting common radio configurations |
US20030185171A1 (en) * | 2002-03-28 | 2003-10-02 | Motorola, Inc. | Method and apparatus for transmitting diversity or beacon information |
US7768974B2 (en) * | 2003-02-03 | 2010-08-03 | Alcatel-Lucent | Method and arrangement for generating pilot beacons in wireless communication systems |
US9137822B2 (en) | 2004-07-21 | 2015-09-15 | Qualcomm Incorporated | Efficient signaling over access channel |
US9148256B2 (en) | 2004-07-21 | 2015-09-29 | Qualcomm Incorporated | Performance based rank prediction for MIMO design |
CN100396149C (en) * | 2004-11-17 | 2008-06-18 | 华为技术有限公司 | Method for shortening switching time delay |
EP2254265A3 (en) | 2005-01-05 | 2013-11-27 | ATC Technologies, LLC | Adaptive beam forming with multi-user detection and interference reduction in satellite communication systems and methods |
US9246560B2 (en) | 2005-03-10 | 2016-01-26 | Qualcomm Incorporated | Systems and methods for beamforming and rate control in a multi-input multi-output communication systems |
US9154211B2 (en) | 2005-03-11 | 2015-10-06 | Qualcomm Incorporated | Systems and methods for beamforming feedback in multi antenna communication systems |
US8446892B2 (en) | 2005-03-16 | 2013-05-21 | Qualcomm Incorporated | Channel structures for a quasi-orthogonal multiple-access communication system |
US9520972B2 (en) | 2005-03-17 | 2016-12-13 | Qualcomm Incorporated | Pilot signal transmission for an orthogonal frequency division wireless communication system |
US9461859B2 (en) | 2005-03-17 | 2016-10-04 | Qualcomm Incorporated | Pilot signal transmission for an orthogonal frequency division wireless communication system |
US9143305B2 (en) | 2005-03-17 | 2015-09-22 | Qualcomm Incorporated | Pilot signal transmission for an orthogonal frequency division wireless communication system |
US9184870B2 (en) | 2005-04-01 | 2015-11-10 | Qualcomm Incorporated | Systems and methods for control channel signaling |
US9408220B2 (en) | 2005-04-19 | 2016-08-02 | Qualcomm Incorporated | Channel quality reporting for adaptive sectorization |
US9036538B2 (en) | 2005-04-19 | 2015-05-19 | Qualcomm Incorporated | Frequency hopping design for single carrier FDMA systems |
US8565194B2 (en) | 2005-10-27 | 2013-10-22 | Qualcomm Incorporated | Puncturing signaling channel for a wireless communication system |
US8879511B2 (en) | 2005-10-27 | 2014-11-04 | Qualcomm Incorporated | Assignment acknowledgement for a wireless communication system |
US8611284B2 (en) | 2005-05-31 | 2013-12-17 | Qualcomm Incorporated | Use of supplemental assignments to decrement resources |
US8462859B2 (en) | 2005-06-01 | 2013-06-11 | Qualcomm Incorporated | Sphere decoding apparatus |
US9179319B2 (en) | 2005-06-16 | 2015-11-03 | Qualcomm Incorporated | Adaptive sectorization in cellular systems |
US20070071147A1 (en) * | 2005-06-16 | 2007-03-29 | Hemanth Sampath | Pseudo eigen-beamforming with dynamic beam selection |
US8599945B2 (en) | 2005-06-16 | 2013-12-03 | Qualcomm Incorporated | Robust rank prediction for a MIMO system |
US7609676B2 (en) * | 2005-06-30 | 2009-10-27 | Motorola, Inc. | Method for preventing reporting of duplicate pilots within a communication system |
US8885628B2 (en) | 2005-08-08 | 2014-11-11 | Qualcomm Incorporated | Code division multiplexing in a single-carrier frequency division multiple access system |
US9209956B2 (en) | 2005-08-22 | 2015-12-08 | Qualcomm Incorporated | Segment sensitive scheduling |
US20070041457A1 (en) | 2005-08-22 | 2007-02-22 | Tamer Kadous | Method and apparatus for providing antenna diversity in a wireless communication system |
US8644292B2 (en) | 2005-08-24 | 2014-02-04 | Qualcomm Incorporated | Varied transmission time intervals for wireless communication system |
US9136974B2 (en) | 2005-08-30 | 2015-09-15 | Qualcomm Incorporated | Precoding and SDMA support |
US9225488B2 (en) | 2005-10-27 | 2015-12-29 | Qualcomm Incorporated | Shared signaling channel |
US8045512B2 (en) | 2005-10-27 | 2011-10-25 | Qualcomm Incorporated | Scalable frequency band operation in wireless communication systems |
US9225416B2 (en) | 2005-10-27 | 2015-12-29 | Qualcomm Incorporated | Varied signaling channels for a reverse link in a wireless communication system |
US9088384B2 (en) | 2005-10-27 | 2015-07-21 | Qualcomm Incorporated | Pilot symbol transmission in wireless communication systems |
US9210651B2 (en) | 2005-10-27 | 2015-12-08 | Qualcomm Incorporated | Method and apparatus for bootstraping information in a communication system |
US9144060B2 (en) | 2005-10-27 | 2015-09-22 | Qualcomm Incorporated | Resource allocation for shared signaling channels |
US8693405B2 (en) | 2005-10-27 | 2014-04-08 | Qualcomm Incorporated | SDMA resource management |
US9172453B2 (en) | 2005-10-27 | 2015-10-27 | Qualcomm Incorporated | Method and apparatus for pre-coding frequency division duplexing system |
US8582509B2 (en) | 2005-10-27 | 2013-11-12 | Qualcomm Incorporated | Scalable frequency band operation in wireless communication systems |
US8477684B2 (en) | 2005-10-27 | 2013-07-02 | Qualcomm Incorporated | Acknowledgement of control messages in a wireless communication system |
US8582548B2 (en) | 2005-11-18 | 2013-11-12 | Qualcomm Incorporated | Frequency division multiple access schemes for wireless communication |
US20070153983A1 (en) * | 2006-01-03 | 2007-07-05 | Sony Ericsson Mobile Communications Ab | Method and Apparatus for Routing Emergency Calls in a VoIP System |
US8920343B2 (en) | 2006-03-23 | 2014-12-30 | Michael Edward Sabatino | Apparatus for acquiring and processing of physiological auditory signals |
US7358893B2 (en) * | 2006-09-08 | 2008-04-15 | Novatel, Inc. | Pseudo random code modulated signal combiner |
US8380531B2 (en) * | 2008-07-25 | 2013-02-19 | Invivodata, Inc. | Clinical trial endpoint development process |
KR101618283B1 (en) * | 2009-05-22 | 2016-05-04 | 삼성전자주식회사 | Method of information feedback for coordinated multiple point communications |
CN102111853B (en) * | 2009-12-25 | 2015-11-25 | 联想(北京)有限公司 | A kind of method that automatically switching network connects, device and mobile terminal |
US9554367B1 (en) * | 2014-05-05 | 2017-01-24 | Sprint Spectrum L.P. | Systems and methods for determining an access node for a wireless device |
WO2023013170A1 (en) * | 2021-08-06 | 2023-02-09 | ソニーグループ株式会社 | Communication device and communication method |
CN116437158B (en) * | 2023-06-13 | 2023-09-01 | 浙江大华技术股份有限公司 | Video transmission method, video transmission device, and computer-readable storage medium |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4901307A (en) * | 1986-10-17 | 1990-02-13 | Qualcomm, Inc. | Spread spectrum multiple access communication system using satellite or terrestrial repeaters |
US5267262A (en) * | 1989-11-07 | 1993-11-30 | Qualcomm Incorporated | Transmitter power control system |
US5109390A (en) * | 1989-11-07 | 1992-04-28 | Qualcomm Incorporated | Diversity receiver in a cdma cellular telephone system |
US5101501A (en) * | 1989-11-07 | 1992-03-31 | Qualcomm Incorporated | Method and system for providing a soft handoff in communications in a cdma cellular telephone system |
US5103459B1 (en) * | 1990-06-25 | 1999-07-06 | Qualcomm Inc | System and method for generating signal waveforms in a cdma cellular telephone system |
IL100213A (en) * | 1990-12-07 | 1995-03-30 | Qualcomm Inc | CDMA microcellular telephone system and distributed antenna system therefor |
US5235615A (en) * | 1991-05-22 | 1993-08-10 | Cylink Corporation | Spread spectrum method |
US5164958A (en) * | 1991-05-22 | 1992-11-17 | Cylink Corporation | Spread spectrum cellular handoff method |
US5195090A (en) * | 1991-07-09 | 1993-03-16 | At&T Bell Laboratories | Wireless access telephone-to-telephone network interface architecture |
US5184347A (en) * | 1991-07-09 | 1993-02-02 | At&T Bell Laboratories | Adaptive synchronization arrangement |
CA2066538C (en) * | 1991-07-09 | 1997-12-23 | Brian David Bolliger | Mobile-telephone system call processing arrangement |
US5267261A (en) * | 1992-03-05 | 1993-11-30 | Qualcomm Incorporated | Mobile station assisted soft handoff in a CDMA cellular communications system |
US5295153A (en) * | 1992-04-13 | 1994-03-15 | Telefonaktiebolaget L M Ericsson | CDMA frequency allocation |
US5329555A (en) * | 1992-09-09 | 1994-07-12 | Motorola, Inc. | Method and apparatus for antenna diversity in a wireless communication system |
DE4303355A1 (en) * | 1993-02-05 | 1994-08-11 | Philips Patentverwaltung | Radio system |
US5438565A (en) * | 1993-03-31 | 1995-08-01 | At&T Corp. | Packet switch to provide code division, multiple access cellular service |
US5812935A (en) * | 1993-04-17 | 1998-09-22 | Hughes Electronics | Cellular system employing base station transmit diversity according to transmission quality level |
WO1994026074A1 (en) * | 1993-04-26 | 1994-11-10 | Airtouch Communications | Cdma transmission delay method and apparatus |
EP0624994B1 (en) * | 1993-05-12 | 2000-04-05 | Ntt Mobile Communications Network Inc. | Hand-off method and mobile station for spread spectrum communications system |
US5437055A (en) * | 1993-06-03 | 1995-07-25 | Qualcomm Incorporated | Antenna system for multipath diversity in an indoor microcellular communication system |
US6157668A (en) * | 1993-10-28 | 2000-12-05 | Qualcomm Inc. | Method and apparatus for reducing the average transmit power of a base station |
US5697055A (en) * | 1994-10-16 | 1997-12-09 | Qualcomm Incorporated | Method and apparatus for handoff between different cellular communications systems |
US5657325A (en) * | 1995-03-31 | 1997-08-12 | Lucent Technologies Inc. | Transmitter and method for transmitting information packets with incremental redundancy |
-
1996
- 1996-05-22 US US08/651,430 patent/US5926470A/en not_active Expired - Lifetime
-
1997
- 1997-05-20 TW TW086106696A patent/TW361021B/en not_active IP Right Cessation
- 1997-05-22 JP JP54270997A patent/JP4191249B2/en not_active Expired - Lifetime
- 1997-05-22 EP EP97927692A patent/EP0900512B1/en not_active Expired - Lifetime
- 1997-05-22 BR BR9712090-1A patent/BR9712090A/en not_active Application Discontinuation
- 1997-05-22 CN CNB971965862A patent/CN1158889C/en not_active Expired - Lifetime
- 1997-05-22 AT AT97927692T patent/ATE302535T1/en not_active IP Right Cessation
- 1997-05-22 DE DE69733997T patent/DE69733997T2/en not_active Expired - Lifetime
- 1997-05-22 CA CA2256409A patent/CA2256409C/en not_active Expired - Fee Related
- 1997-05-22 WO PCT/US1997/008671 patent/WO1997044983A2/en active IP Right Grant
- 1997-05-22 IL IL12717197A patent/IL127171A/en not_active IP Right Cessation
- 1997-05-22 AU AU32091/97A patent/AU3209197A/en not_active Abandoned
- 1997-06-20 ZA ZA974384A patent/ZA974384B/en unknown
-
1999
- 1999-09-09 HK HK99103922A patent/HK1018874A1/en not_active IP Right Cessation
-
2007
- 2007-02-15 JP JP2007035396A patent/JP4643600B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2000511377A (en) | 2000-08-29 |
TW361021B (en) | 1999-06-11 |
AU3209197A (en) | 1997-12-09 |
BR9712090A (en) | 1999-08-31 |
WO1997044983A2 (en) | 1997-11-27 |
EP0900512B1 (en) | 2005-08-17 |
WO1997044983A3 (en) | 1997-12-24 |
ATE302535T1 (en) | 2005-09-15 |
DE69733997D1 (en) | 2005-09-22 |
EP0900512A2 (en) | 1999-03-10 |
CN1225788A (en) | 1999-08-11 |
DE69733997T2 (en) | 2006-06-29 |
JP4191249B2 (en) | 2008-12-03 |
HK1018874A1 (en) | 2000-01-07 |
JP4643600B2 (en) | 2011-03-02 |
US5926470A (en) | 1999-07-20 |
IL127171A (en) | 2003-06-24 |
CN1158889C (en) | 2004-07-21 |
CA2256409C (en) | 2011-08-02 |
ZA974384B (en) | 1998-08-24 |
JP2007195206A (en) | 2007-08-02 |
IL127171A0 (en) | 1999-09-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2256409A1 (en) | Method and apparatus for providing diversity in hard handoff for a cdma system | |
US7079809B1 (en) | Systems and methods for providing improved wireless signal quality using diverse antenna beams | |
KR100237903B1 (en) | Double diversity antenna system | |
US6522639B1 (en) | Transmission/reception apparatus and transmit power control method | |
EP0688479B1 (en) | Method of transmitting and receiving power control messages in a cdma cellular radio system | |
US7099634B2 (en) | Transmitting diversity communications apparatus | |
EP0928075B1 (en) | Transmission power control in a CDMA/TDD radio communication system | |
US7684469B2 (en) | Code division multiple access transmission antenna weighting | |
US20030092379A1 (en) | Method and apparatus for received uplink-signal based adaptive downlink diversity within a communication system | |
CA2294852A1 (en) | Device and method for a mobile station for receiving signals transmitted from a base station | |
AU1436799A (en) | Method and arrangement for adjusting antenna pattern | |
KR20000065190A (en) | Methods and systems for improving communication | |
WO2005120096A3 (en) | Three-dimensional control channel beams | |
EP1001557B1 (en) | Radio communication apparatus and method with path diversity | |
WO2005032200A3 (en) | Handover in a system with adaptive antennas | |
CA2294224A1 (en) | Sectorization of cellular cdma-system | |
JP2004297750A (en) | Radio communication system | |
GB2340693A (en) | Spread spectrum communication system and base station thereof | |
CA2305871A1 (en) | Channel communication device and method for mobile communication system using transmission antenna diversity | |
GB2394864A (en) | Cellular radio telecommunication system | |
EP1451894B1 (en) | Two fixed-beams tx-diversity | |
US6275482B1 (en) | Combined angular, spatial, and temporal diversity for mobile radio system | |
CN108123743B (en) | W L AN base station signal receiving and transmitting method based on multiple sectors | |
KR100465314B1 (en) | System for beam forming of mobile communication and method thereof | |
RU98123114A (en) | METHOD AND DEVICE FOR ENSURING DIVERSITY BY HARD SWITCHING OF COMMUNICATION CHANNELS FOR MULTIPLE ACCESS SYSTEM WITH CODE DIVISION OF CHANNELS |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |
Effective date: 20170523 |