摘要:
The proposed technology generally relates to sending a data packet from a first node to a second node, wherein there is a direct link to the second node from the first node. The method comprises the steps of: determining a first power metric associated with transmitting the data packet from the first node to the second node on the direct link; when the determined first power metric is above a first power level then determining a first set of aggregation nodes, being within reach of the first node, wherein each aggregation node in the set is comprised in a respective alternative transmission path from the first node to the second node; for each aggregation node in the first set determining a second power metric associated with transmitting the data packet to from the first node to the second node via the aggregation node; selecting a transmission path for sending the data packet from the first node to the second node based on a comparison of the first power metric and the second power metric(s) and sending the packet on the selected transmission path. One aspect of the proposed technology relates to a method and ending a data packet from the first node to a second node as well as a corresponding device and computer program.
摘要:
A communication system in which a communication apparatus includes a calculation unit configured to calculate, upon receiving a search signal from a new communication apparatus, a first time length by multiplying a first weighting time length by a relay count in a communication route to a destination, a second time length by multiplying a second weighting time length shorter than the first weighting time length by the signal strength of each communication link in the communication route, and a third time length by adding the first and second time lengths, and a transmission unit configured to transmit a response signal upon passage of the third time length from the receipt of the search signal, wherein upon receiving the response signal from one of the communication apparatuses ahead of any other response signals, the new communication apparatus sets the one of the communication apparatuses as the most adjacent relay point.
摘要:
A method in a first network node (215) for handling transport network data traffic in a first base station (201) is provided. The first base station (201) comprises a transport network transmission equipment (205) and the transport network transmission equipment (205) is a part of a transport network. When the first base station (201) is in a sleep mode, the first network node (215) determines (306, 801) that the transport network transmission equipment (205) should be bypassed by activating a relay (209) comprised in the first base station (201) such that data traffic from a second network node (217) is transmitted via the relay (209) to a third network node (220).
摘要:
A wireless communications system includes a base station, a plurality of intermediate devices, and a terminal device. Downlink communications may be provided directly from the base station to the terminal device, including control signals which instruct the terminal device where to send uplink data. This enables the base station to directly control scheduling of uplink communications, and in particular to define an uplink route from the terminal device to the base station via one or more intermediate devices. Power is conserved at the terminal device on the uplink because a lower power transmission can be used which although insufficient to reach the base station can reach the intermediate device. The terminal device is not required to determine the uplink path itself and therefore does not require complex, expensive, and power consuming control logic.
摘要:
A wireless communications system includes a base station, a plurality of intermediate devices and a terminal device. The base station is operable to wirelessly transmit downlink signals to the terminal device, the downlink signals including terminal control signals identifying one of the intermediate devices as a target device to which the terminal device is to direct uplink signals intended for the base station. The terminal device wirelessly transmits the uplink signals to the base station via the intermediate device identified by the terminal control signals. In this way, downlink communications may be provided directly from the base station to the terminal device, including control signals which instruct the terminal device where to send uplink data. This enables the base station to directly control scheduling of uplink communications, and in particular to define the uplink route from the terminal device to the base station via one or more intermediate devices.
摘要:
By introducing a novel parameter common to all links along the entire multihop route it is possible to more flexibly allocate, for each of a number of the links, a set of three interdependent link transmit parameters representative of link transmit energy, link transmit time or link transmit bandwidth or link code word consumption, and link transmit power. Basically, the common parameter is determined based on a given end-to-end (ETE) transmit parameter constraint for the entire multihop route. The idea is then to assign or allocate, for each considered link, the three interdependent link transmit parameters based on the common parameter and local link characteristics. In this way, all three link transmit parameters may (and generally will) be different between at least two links on the route when the links have different link characteristics, assuming that each link transmit parameter is also dependent on the local link characteristics. Preferably, the common parameter is determined in the process of optimizing a given objective ETE function.
摘要:
Providing for a cross-layer spectrum sharing model incorporating implicit power control for cognitive radio wireless communication is described herein. By way of example, a binary integer linear programming problem is formulated to establish active wireless links among secondary user nodes in a cognitive radio, ad-hoc network. The formulation reuses wireless channels among multiple activated links within disclosed interference constraints, and assigns a power level for transmissions on respective links. Additionally, the formulation employs bi- directional wireless links for the ad-hoc network, improving communication within the ad-hoc network. Further, power level assignments can be predefined and implicitly embedded in the formulation to reduce complexity.
摘要:
An ad-hoc, peer-to-peer radio access system for cellular communications systems using time division duplex as a way of maximizing the bits/hz/km2 for cellular systems. The network architecture of the ad-hoc system allows the radio access to be integrated with the fixed components of a conventional cellular system, PSTN or ISP. The objective is to make the system of the invention transparent to the features and services provided by the external network. The advantages of such a system to a cellular operator are that significantly less infrastructure is required, and that the RF spectrum is more efficiently utilized resulting in much lower building and operating costs. The system architecture is comprised of remote terminals, routers, gateways, and at least one gateway controller that interfaces the ad-hoc system to a cellular network system. The ad-hoc system of the invention allows for both voice and data transmissions and receptions.
摘要:
Systems, apparatuses, and methods relating to mesh network communications are described. In one embodiment a method may include receiving at least one information packet at a node, identifying one or more output communication links, assessing at least one characteristic of at least one of the one or more identified output communication links, and transmitting one or more information packets from a node via at least one of one or more identified output communication links based at least in part on at least one characteristic.