Channel hopping in a radio communication system
First Claim
1. A method of channel hopping in a radio communications systems wherein channel hopping is effected between channels for connections between a base station and at least one mobile station in the radio communications system, and wherein the connections are subjected to signal attenuation and interference, said method comprising the steps of:
- generating a signal attenuation parameter for the respective connections, wherein said signal attenuation parameter corresponds to the extent by which a desired signal has been attenuated when it is transmitted from a transmitter until it is received by a receiver;
generating a channel quality parameter for the respective channels;
generating at least one channel hop sequence for the respective connections, wherein a channel hop sequence includes a number of channels between which the connection hops, and wherein a channel hop sequence is generated in accordance with the signal attenuation parameter of the connections and the channel quality parameter of said channels, wherein the better a connection is with regard to the signal attenuation parameter, the poorer the channels will be with regard to the channel quality parameter in the channel hop sequence for that connection;
allocating the channel to a respective hop sequence list in the base station and in the mobile stations; and
channel hopping between the channels in the channel that have been allocated to the hop sequence lists when communicating by radio on the connections between the base station and the mobile stations.
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Accused Products
Abstract
The invention relates to a method and to an arrangement for effecting base orthogonal channel hopping between mobile stations (MS1-MS3) and a base station in a radio communications system. Connections (F1-F3) having low attenuation are allotted a number of channels having high interference I (channel, t). Connections (F1-F3) that have higher attenuation are allocated a number of channels that have lower interference I (channel, t). A channel allocation means (211) in the base station functions to produce channel hopsequences which are transferred to hopsequence lists (204-206) in the mobile stations (MS1-MS3), via a control channel SACCH. The channel hopsequences are also transferred to corresponding hopsequence lists (201-203) in the base station. Attenuation of the connections (F1-F3) and interference on the channels I (channel, t) are measured continuously in the channel allocating means (211), wherein the best channels with respect to interference are used. The channel allocation means creates the channel hop sequences in accordance with the principle that the better a connection with respect to attenuation, the poorer the channels with respect to interference that are allocated to the connection.
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Citations
24 Claims
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1. A method of channel hopping in a radio communications systems wherein channel hopping is effected between channels for connections between a base station and at least one mobile station in the radio communications system, and wherein the connections are subjected to signal attenuation and interference, said method comprising the steps of:
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generating a signal attenuation parameter for the respective connections, wherein said signal attenuation parameter corresponds to the extent by which a desired signal has been attenuated when it is transmitted from a transmitter until it is received by a receiver; generating a channel quality parameter for the respective channels; generating at least one channel hop sequence for the respective connections, wherein a channel hop sequence includes a number of channels between which the connection hops, and wherein a channel hop sequence is generated in accordance with the signal attenuation parameter of the connections and the channel quality parameter of said channels, wherein the better a connection is with regard to the signal attenuation parameter, the poorer the channels will be with regard to the channel quality parameter in the channel hop sequence for that connection; allocating the channel to a respective hop sequence list in the base station and in the mobile stations; and channel hopping between the channels in the channel that have been allocated to the hop sequence lists when communicating by radio on the connections between the base station and the mobile stations. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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2. A method of base orthogonal channel hopping in a radio communications system wherein channel hopping is effected between channels for connection between a base station and at least one mobile station in the radio communications system, wherein the connections are subjected to signal attenuation and interference and wherein the method comprises the steps of:
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generating a signal attenuation parameter for the respective connections, wherein said signal attenuation parameter corresponds to the extent by which a desired signal has been attenuated when it is transmitted from a transmitter until it is received by a receiver; generating a channel quality parameter for the respective channels; generating at least one channel hop sequence for the respective connections, said channel hop sequences being base orthogonal so that at most one of the connections will use a channel pointed-out in the base station at each time point, wherein a channel hop sequence includes a number of channels between which the connection hops, wherein said at least one channel hop sequence is generated in accordance with the signal attenuation parameter of the connections and the channel quality parameter of said channels, wherein the better a connection is with regard to the signal attenuation parameter, the poorer the channels will be with regard to the channel quality parameter in the channel hop sequence for that connection; allocating the channel hop sequences to a respective hop sequence list in the base station and in the mobile stations; and channel hopping between the channels in the base orthogonal channel hop sequences that have been allocated to the hop sequence lists when communicating by radio on the connections between the base station and the mobile stations.
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21. An arrangement relating to radio communications systems and including a base station and at least one mobile station, wherein channel hopping is effected between channels for connections between the base station and the mobile stations, and wherein the connections are subject to signal attenuation and interference, said arrangement comprising:
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means for generating a signal attenuation parameter for respective connections, wherein said signal attenuation parameter corresponds to the extent by which a desired signal has been attenuated when it is transmitted from a transmitter until it is received by a receiver; means for generating a channel quality parameter for respective channels; means for generating at least one channel hop sequence for respective connections, wherein a channel hop sequence includes a number of channels between which the connection hops, and wherein said channel hop sequence is generated in accordance with the signal attenuation parameter of the connections and the channel quality parameter of the channels, wherein the better a connection is with regard to the signal attenuation parameter, the poorer the channels will be with regard to the channel quality parameter in the channel hop sequence for that connection; and means for allocating the channel hop sequences to a respective hop sequence list of the base station and the mobile stations and for controlling channel hopping between the channels in the channel hop sequences that have been allocated to the hop sequence lists, when communicating by radio connections between the base station and the mobile stations. - View Dependent Claims (23, 24)
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22. An arrangement relating to radio communications systems, wherein the arrangement includes a base station and at least one mobile station, wherein base orthogonal channel hopping is effected between channels for connections between the base station and the mobile stations, and wherein the connections are subject to signal attenuation and interference, said arrangement comprising:
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means for generating a signal attenuation parameter for respective connections, wherein said signal attenuation parameter corresponds to the extent by which a desired signal has been attenuated when it is transmitted from a transmitter until it is received by a receiver; means for generating a channel quality parameter for respective channels; means for generating at least one channel hop sequence for respective connections, wherein said channel hop sequences are based orthogonal so that at most one of the connections will use as indicated channel within the base station at each time point, and wherein a channel hop sequence includes a number of channels between which the connection hops, and wherein said at least one channel hop sequence is generated in accordance with the signal attenuation parameter of the connections and the channel quality parameter of the channels, wherein the better a connection is with regard to the signal attenuation parameter, the poorer the channels will be with regard to the channel quality parameter in the channel hop sequence for that connection; and means for allocating the channel hop sequences to a respective hop sequence list of the base station and the mobile stations, and for controlling channel hopping between the channels (ch1-ch6) in the base orthogonal channel hop sequences that have been allocated to the hop sequence lists when communicating by radio on the connections between the base station and the mobile stations.
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Specification