Radio Network With Parallel Transmission and a Method of Forwarding a Signal in a Radio Network
First Claim
1. A radio network consisting of a plurality of devices which are grouped into at least two subnets wherein a subnet comprises at least a single device and neighbouring subnets use different scrambling codes and wherein a source device has a transmission range and sends a source signal using part of the network'"'"'s resources to a destination device via more than one radio hop where the destination device is not in the transmission range of said source device and thus not able to receive the source signal directly, and wherein a spread spectrum is used to separate parallel transmissions, characterized in that one of the radio network'"'"'s devices acts as a forwarding device that is able to communicate in both the subnet of the source device and a neighbouring subnet as it is aware of the scrambling codes of both subnets and the forwarding device receives the source signal sent by the source device, realizes that itself is not the intended receiver, manipulates the scrambling code of the received signal to that one of the neighbouring subnet and forwards or relays the manipulated signal to the neighbouring subnet.
1 Assignment
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Accused Products
Abstract
The subnets of a radio network are separated by different scrambling codes. A signalling frame comprises information concerning the spreading code used on the neighbouring or second subnet which can therefore be reserved for a multi hop connection in the first subnet as well. Therefore, in the easiest case the forwarding device only needs to change the scrambling code of the data flow to that of the following subnet and can keep the same spreading code.
16 Citations
15 Claims
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1. A radio network consisting of a plurality of devices which are grouped into at least two subnets wherein a subnet comprises at least a single device and neighbouring subnets use different scrambling codes and wherein a source device has a transmission range and sends a source signal using part of the network'"'"'s resources to a destination device via more than one radio hop where the destination device is not in the transmission range of said source device and thus not able to receive the source signal directly, and wherein a spread spectrum is used to separate parallel transmissions, characterized in that
one of the radio network'"'"'s devices acts as a forwarding device that is able to communicate in both the subnet of the source device and a neighbouring subnet as it is aware of the scrambling codes of both subnets and the forwarding device receives the source signal sent by the source device, realizes that itself is not the intended receiver, manipulates the scrambling code of the received signal to that one of the neighbouring subnet and forwards or relays the manipulated signal to the neighbouring subnet.
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7. The radio network of claim 7, characterized in that the participating devices use an on demand mechanism (RTS/CTS) for negotiating and for reserving resources.
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10. A method of forwarding a signal in a radio network consisting of devices which are grouped into at least two subnets wherein a subnet comprises at least a single device and neighbouring subnets use different scrambling codes, wherein a source device has a transmission range and sends a source signal using part of the network'"'"'s resources to a destination device via more than one radio hop where the destination device is not in the transmission range of the source device and thus not able to directly receive the source signal and wherein any form of spread spectrum is used to separate parallel transmissions, characterized by the steps of
the source device sending a signal on a selected code channel or on selected code channels by using the scrambling code of the subnet it belongs to; a forwarding device which is located in the intersection of the source station'"'"'s subnet and a neighbouring subnet and thus is able to communicate in both of them as it is aware of both scrambling codes used, this forwarding device receiving the source signal, realizing that itself is not the intended receiver, manipulating the signal in order to adopt it to the scrambling code of the neighbouring subnet and forwarding or relaying the manipulated signal to the neighbouring subnet. - View Dependent Claims (11, 12, 13, 14)
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15. A device in the intersection of a first and a neighbouring subnet that is able to forward or relay to the neighbouring subnet a signal whose source is in the first subnet whereby in the two subnets a different scrambling code is used, characterized in that the device comprises
means for receiving a radio source signal; -
means for decoding a received radio signal which is split up by a spreading code in order to retrieve the data spectrum;
means for encoding a data spectrum by means of a spreading code in order to achieve a broad bandwidth;
means for manipulating the received signal as regards the scrambling code used and means for sending the manipulated signal.
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Specification