Communication Systems
First Claim
1. A wireless transmission method for use in a multi-hop wireless communication system, the system comprising at least three communication apparatuses, one said communication apparatus comprising a source apparatus, another said communication apparatus comprising a destination apparatus and the other said communication apparatus comprising an intermediate apparatus, said source apparatus being operable to transmit information in a transmission window in a communication direction along a communication path extending from the source apparatus to the destination apparatus via the intermediate apparatus, the transmission window having a shape defined by a transmission frequency bandwidth profile over a transmission interval, the communication path comprising a series of two or more consecutive links from the source apparatus to the destination apparatus, and the intermediate apparatus being operable to receive information from a previous communication apparatus in said communication direction and to transmit the received information in such a transmission window to a subsequent apparatus in said communication direction, the method comprising:
- determining for a particular transmission at least one measure of the expected link characteristics for at least two links of the communication path; and
for each of those links, configuring a particular transmission window by setting its shape and/or a transmission format to be used in that window in dependence upon the measure for that link only; and
during that particular transmission, transmitting information along those links using, for each of those links, the particular transmission window for that link.
1 Assignment
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Accused Products
Abstract
In accordance with one embodiment of the present invention, a wireless transmission method for use in a multi-hop wireless communication system includes determining for a particular transmission at least one measure of the expected link characteristics for at least two links of a communication path, and for each of those links, configuring a particular transmission window by setting its shape and/or a transmission format to be used in that window in dependence upon the measure for that link only. Furthermore, the method includes, during that particular transmission, transmitting information along those links using, for each of those links, the particular transmission window for that link.
43 Citations
24 Claims
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1. A wireless transmission method for use in a multi-hop wireless communication system, the system comprising at least three communication apparatuses, one said communication apparatus comprising a source apparatus, another said communication apparatus comprising a destination apparatus and the other said communication apparatus comprising an intermediate apparatus, said source apparatus being operable to transmit information in a transmission window in a communication direction along a communication path extending from the source apparatus to the destination apparatus via the intermediate apparatus, the transmission window having a shape defined by a transmission frequency bandwidth profile over a transmission interval, the communication path comprising a series of two or more consecutive links from the source apparatus to the destination apparatus, and the intermediate apparatus being operable to receive information from a previous communication apparatus in said communication direction and to transmit the received information in such a transmission window to a subsequent apparatus in said communication direction, the method comprising:
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determining for a particular transmission at least one measure of the expected link characteristics for at least two links of the communication path; and
for each of those links, configuring a particular transmission window by setting its shape and/or a transmission format to be used in that window in dependence upon the measure for that link only; and
during that particular transmission, transmitting information along those links using, for each of those links, the particular transmission window for that link. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A multi-hop wireless communication system, the system comprising:
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at least three communication apparatuses, one said communication apparatus comprising a source apparatus, another said communication apparatus comprising a destination apparatus and the other said communication apparatus comprising an intermediate apparatus, said source apparatus being operable to transmit information in a transmission window in a communication direction along a communication path extending from the source apparatus to the destination apparatus via the intermediate apparatus, the transmission window having a shape defined by a transmission frequency bandwidth profile over a transmission interval, the communication path comprising a series of two or more consecutive links from the source apparatus to the destination apparatus, and the intermediate apparatus being operable to receive information from a previous communication apparatus in said communication direction and to transmit the received information in such a transmission window to a subsequent apparatus in said communication direction;
determining means operable to determine for a particular transmission at least one measure of the expected link characteristics for at least two links of the communication path;
configuring means operable, for each of those links, to configure a particular transmission window by setting its shape and/or a transmission format to be used in that window in dependence upon the measure for that link only; and
transmission means operable, during that particular transmission, to transmit information along those links using the particular transmission window for the link concerned.
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22. A source apparatus for use in a multi-hop wireless communication system, the system comprising at least three communication apparatuses, one said communication apparatus comprising the source apparatus, another said communication apparatus comprising a destination apparatus and the other said communication apparatus comprising an intermediate apparatus, said source apparatus being operable to transmit information in a transmission window in a communication direction along a communication path extending from the source apparatus to the destination apparatus via the intermediate apparatus, the transmission window having a shape defined by a transmission frequency bandwidth profile over a transmission interval, the communication path comprising a series of two or more consecutive links from the source apparatus to the destination apparatus, and the intermediate apparatus being operable to receive information from a previous communication apparatus in said communication direction and to transmit the received information in such a transmission window to a subsequent apparatus in said communication direction, the source apparatus comprising:
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determining means operable to determine for a particular transmission at least one measure of the expected link characteristics for at least two links of the communication path;
configuring means operable, for each of those links, to configure a particular transmission window by setting its shape and/or a transmission format to be used in that window in dependence upon the measure for that link only; and
transmission means operable, during that particular transmission, to transmit information along a first link from the source apparatus using the particular transmission window for the first link.
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23. An intermediate apparatus for use in a multi-hop wireless communication system, the system comprising:
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at least three communication apparatuses, one said communication apparatus comprising a source apparatus, another said communication apparatus comprising a destination apparatus and the other said communication apparatus comprising such an intermediate apparatus, said source apparatus being operable to transmit information in a transmission window in a communication direction along a communication path extending from the source apparatus to the destination apparatus via the intermediate apparatus, the transmission window having a shape defined by a transmission frequency bandwidth profile over a transmission interval, the communication path comprising a series of two or more consecutive links from the source apparatus to the destination apparatus, and the intermediate apparatus being operable to receive information from a previous communication apparatus in said communication direction and to transmit the received information in such a transmission window to a subsequent apparatus in said communication direction, said intermediate apparatus comprising;
determining means operable to determine for a particular transmission at least one measure of the expected link characteristics for at least two links of the communication path;
configuring means operable, for each of those links, to configure a particular transmission window by setting its shape and/or a transmission format to be used in that window in dependence upon the measure for that link only; and
transmission means operable, during that particular transmission, to transmit information along a link from said intermediate apparatus using the particular transmission window for the link concerned.
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24. A computer program embodied in a computer-readable medium and operable, when executed on a computing device in a wireless multi-hop wireless communication system, to carry out a transmission method, the multi-hop wireless communication system comprising at least three communication apparatuses, one said communication apparatus comprising a source apparatus, another said communication apparatus comprising a destination apparatus and the other said communication apparatus comprising an intermediate apparatus, said source apparatus being operable to transmit information in a transmission window having a shape defined by a transmission frequency bandwidth profile over a transmission interval in a communication direction along a communication path extending from the source apparatus to the destination apparatus via the intermediate apparatus, the communication path comprising a series of two or more consecutive links from the source apparatus to the destination apparatus, and the intermediate apparatus being operable to receive information from a previous communication apparatus in said communication direction and to transmit the received information in such a transmission window to a subsequent apparatus in said communication direction, the method comprising:
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determining for a particular transmission at least one measure of the expected link characteristics for at least two links of the communication path; and
for each of those links, configuring a particular transmission window by setting its shape and/or a transmission format to be used in that window in dependence upon the measure for that link only; and
during that particular transmission, transmitting information along those links using the particular transmission window for the link concerned.
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Specification