EP0650304A2
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EP
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A frequency hopping control channel in a radio communication system
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1994-10-24
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Granted: —
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Expires: 2014-10-24
Abstract
Abstract A communication system having a frequency hopping scheme which provides an improved initial synchronization in mobile stations of control channels. Special synchronization bursts are inserted into the hop sequence of the control channels which, when decoded, give the mobile station the hop sequence to follow for the control channel.
Inventors
- 👤 Krister Raith
- 👤 Bengt Persson
- 👤 Hakan Eriksson
- 👤 Björn Gudmundson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 08:42
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/713; H04B1/7156; H04B1/707; H04B1/709; H04B1/7093; H04B2001/71563
Claims Analysis
Total Claims: 47
Claim 1
Independent Claim
80 words
A frequency hopping cellular radio communication system comprising: at least one base station and at least one mobile station, the base station using a frequency hop sequence for transmitting at least one first control channel; and means, disposed in said base station, for inserting special synchronization bursts into said frequency hop sequence, wherein at least one of said special synchronization bursts comprise a synchronization word and a pointer indicating at least a frequency for at least a next synchronization burst.
Claim 2
Dependent Claim
23 words
The cellular radio communication system of claim 1, wherein said inserting means inserts said special synchronization bursts periodically into said frequency hop sequence.
Claim 3
Dependent Claim
23 words
The cellular radio communication system of claim 1, wherein said inserting means inserts said special synchronization bursts randomly into said frequency hop sequence.
Claim 4
Dependent Claim
25 words
The cellular radio communication system of claim 1, wherein a blocked sequence of said special synchronization bursts further comprise information defining said frequency hop sequence.
Claim 5
Dependent Claim
25 words
The cellular radio communication system of claim 4, wherein said frequency hop sequence is defined as one of a set of predetermined frequency hop sequences.
Claim 6
Dependent Claim
35 words
The cellular radio communication system of claim 4, further comprising: means, disposed in said mobile station, for receiving said special synchronization bursts and for determining said frequency hop sequence from said frequency hop sequence information.
Claim 7
Dependent Claim
49 words
The cellular radio communication system of claim 1, wherein said at least one base station and at least one mobile station have means for communicating with one another using time-hopping TDMA and first time hop sequences, whereby time slots comprising at least one channel change from frame to frame.
Claim 8
Dependent Claim
39 words
The cellular radio communication system of claim 7, wherein the first time hop sequences are designed such that time slots of said at least first control channel do not always coincide with time slots of any particular traffic channel.
Claim 9
Dependent Claim
72 words
The cellular radio communication system of claim 7, further comprising: at least one second base station in an adjacent cell having means for using second time hop sequences for transmitting at least one second control channel, wherein said second time hop sequences are designed such that time slots of said at least one second control channel do not always coincide with time slots of any traffic channel of said first base station.
Claim 10
Dependent Claim
16 words
The cellular radio communication system of claim 7, wherein said control channels do not time hop.
Claim 11
Dependent Claim
16 words
The cellular radio communication system of claim 7, wherein said traffic channels do not time hop.
Claim 12
Dependent Claim
36 words
The cellular radio communication system of claim 1, wherein frequency hop sequences used at said at least one base station are orthogonal to each other but pseudo-random relative to hop sequences used at other base stations.
Claim 13
Dependent Claim
39 words
The cellular radio communication system of claim 7, wherein combined frequency and time hop sequences used at said at least one base station are orthogonal to each other but pseudo-random relative to hop sequences used at other base stations.
Claim 14
Dependent Claim
42 words
The cellular radio communication system of claim 7, wherein said first time hop sequences are determined such that a spacing between any two time slots in adjacent frames used by a traffic channel is at least a predetermined number of time slots.
Claim 15
Dependent Claim
73 words
A frequency hopping cellular radio communication system comprising: at least one first base station and at least one mobile station, the base station using a frequency hop sequence for transmitting at least one first control channel; and means, disposed in said base station, for inserting special synchronization bursts into said frequency hop sequence, wherein at least one of said special synchronization bursts comprise a synchronization word and information defining said frequency hop sequence.
Claim 16
Dependent Claim
23 words
The cellular radio communication system of claim 15, wherein said inserting means inserts said special synchronization bursts periodically into said frequency hop sequence.
Claim 17
Dependent Claim
23 words
The cellular radio communication system of claim 15, wherein said inserting means inserts said special synchronization bursts randomly into said frequency hop sequence.
Claim 18
Dependent Claim
25 words
The cellular radio communication system of claim 15, wherein said frequency hop sequence is defined as one of a set of predetermined frequency hop sequences.
Claim 19
Dependent Claim
31 words
The cellular radio communication system of claim 15, wherein said special synchronization bursts further comprise at least one pointer indicating at least a frequency for at least a next synchronization burst.
Claim 20
Dependent Claim
35 words
The cellular radio communication system of claim 15, further comprising: means, disposed in said mobile station, for receiving said special synchronization bursts and for determining said frequency hop sequence from said frequency hop sequence information.
Claim 21
Dependent Claim
49 words
The cellular radio communication system of claim 15, wherein said at least one base station and at least one mobile station have means for communicating with one another using time-hopping TDMA and first time hop sequences, whereby time slots comprising at least one channel change from frame to frame.
Claim 22
Dependent Claim
37 words
The cellular radio communication system of claim 21, wherein said first time hop sequences are designed such that said time slots of said control channel do not always coincide with time slots of any particular traffic channel.
Claim 23
Dependent Claim
71 words
The cellular radio communication system of claim 21, also comprising: at least one second base station in an adjacent cell having means for using a second time hop sequence for transmitting at least one second control channel, wherein said hop sequences are designed such that time slots of said control channel do not always coincide with time slots of any particular traffic channel of said at least one first base station.
Claim 24
Dependent Claim
16 words
The cellular radio communication system of claim 21, wherein said control channels do not time hop.
Claim 25
Dependent Claim
16 words
The cellular radio communication system of claim 21, wherein said traffic channels do not time hop.
Claim 26
Dependent Claim
36 words
The cellular radio communication system of claim 15, wherein frequency hop sequences used said at least one first base station are orthogonal to each other but pseudo-random to frequency hop sequences used at other base stations.
Claim 27
Dependent Claim
39 words
The cellular radio communication system of claim 21, wherein combined frequency and time hop sequences used said at least one first base station are orthogonal to each other but pseudo-random to frequency hop sequences used at other base stations.
Claim 28
Dependent Claim
43 words
The cellular radio communication system of claim 21, wherein said first time hop sequences are determined such that a spacing between any two time slots in adjacent frames used by any particular traffic channel is at least a predetermined number of time slots.
Claim 29
Dependent Claim
76 words
A frequency hopping cellular radio communication system comprising: at least one base station and at least one mobile station, the base station having means for using a frequency hop sequence for transmitting at least one control channel; and means, disposed in said base station, for transmitting using Code Division Multiple Access overlaid on at least one frequency used by said base station, special synchronization information comprising a synchronization word and information defining said frequency hop sequence.
Claim 30
Dependent Claim
25 words
The cellular radio communication system of claim 29, wherein said frequency hop sequence is defined as one of a set of predetermined frequency hop sequences.
Claim 31
Dependent Claim
35 words
The cellular radio communication system of claim 29, further comprising: means, disposed in said mobile station, for receiving said special synchronization information and for determining said frequency hop sequence from said frequency hop sequence information.
Claim 32
Dependent Claim
51 words
The cellular radio communication system of claim 29, wherein said at least one base station and said at least one mobile station also have means for communicating with one another using time-hopping TDMA and first time hop sequences, whereby time slots comprising at least one channel change from frame to frame.
Claim 33
Dependent Claim
37 words
The cellular radio communication system of claim 32, wherein said first time hop sequences are designed such that said time slots of said control channel do not always coincide with time slots of any particular traffic channel.
Claim 34
Dependent Claim
77 words
The cellular radio communication system of claim 32, also comprising: at least one second base station in an adjacent cell having means for using a second time hop sequence for transmitting at least one second control channel, wherein said second time hop sequences are designed such that time slots of said at least one second control channel do not always coincide with time slots of any particular traffic channel of said at least one first base station.
Claim 35
Dependent Claim
16 words
The cellular radio communication system of claim 32, wherein said control channels do not time hop.
Claim 36
Dependent Claim
16 words
The cellular radio communication system of claims 32, wherein said traffic channels do not time hop.
Claim 37
Dependent Claim
37 words
The cellular radio communication system of claim 29, wherein frequency hop sequences used at said at least one first base station are orthogonal to each other but pseudo-random to frequency hop sequences used at other base stations.
Claim 38
Dependent Claim
40 words
The cellular radio communication system of claim 32, wherein combined frequency and time hop sequences used at said at least one first base station are orthogonal to each other but pseudo-random to frequency hop sequences used at other base stations.
Claim 39
Dependent Claim
43 words
The cellular radio communication system of claim 34, wherein said first time hop sequences are determined such that the spacing between any two time slots in adjacent frames used by any particular traffic channel is at least a predetermined number of time slots.
Claim 40
Dependent Claim
75 words
A Time Division Multiple Access cellular radio communication system comprising: at least one base station having means for transmitting using at least one control channel; means, disposed in said at least one base station, for communicating with at least one mobile station using at least one traffic channel; and means for using time slot hopping, whereby time slots comprising at least one of said control channel and said traffic channel change from frame to frame.
Claim 41
Dependent Claim
39 words
The cellular radio communication system of claim 40, wherein time hop sequences are designed such that time slots of said at least one control channel do not always coincide with time slots of said at least one traffic channel.
Claim 42
Dependent Claim
19 words
The cellular radio communication system of claim 41, wherein said at least one control channel does not time hop.
Claim 43
Dependent Claim
19 words
The cellular radio communication system of claim 41, wherein said at least one traffic channel does not time hop.
Claim 44
Dependent Claim
41 words
The cellular radio communication system of claim 40, wherein time hop sequences are determined such that a spacing between any two time slots in adjacent frames used by any particular traffic channel is at least a predetermined number of time slots.
Claim 45
Dependent Claim
29 words
The cellular communication system of claim 40, also comprising means for frequency hopping at least one of said at least one control channel and at least one traffic channel.
Claim 46
Dependent Claim
42 words
The cellular radio communication system of claim 45, wherein frequency hop sequences for said at least one traffic channel at said at least one base station are orthogonal to each other but pseudo-random to frequency hop sequences used at other base stations.
Claim 47
Dependent Claim
43 words
The cellular radio communication system of claim 40, wherein information of time hop sequences for adjacent base stations control channels are transmitted to said at least one mobile station from said at least one base station using said at least one traffic channel.
References Cited (Backward Citations)
No citation records indexed.
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