Abstract: Methods, apparatuses, and computer program products for communicating channel assessment, channel information, and routing information between a spectrum controller (210) and radio resource manager (220). A spectrum controller obtains channel information and classifies a number of radio channels of a network as available, partially available, or unavailable. The availability information is sent to a radio resource manager, which can use the information to determine a routing solution. The radio resource manager can request that the spectrum controller perform an access negotiation for a partially available channel. Based on the result of the negotiation, the radio resource manager may re-route information in the network.

Abstract: The present disclosure generally relates to the field of resource allocation. More specifically, the present disclosure relates to a technique of allocating communication resources in a wireless communication network. The wireless communication network comprises a plurality of access nodes, each of the plurality of access nodes being connected to one or more of the plurality of access nodes via one or more links to provide a plurality of routes for routing data through the wireless communication network. A method embodiment comprises the step of receiving, for one or more links (180, 182) of at least one access node (100) of the plurality of access nodes, allocation information. The allocation information indicates how available communication resources are to be allocated.

Abstract: The present disclosure relates to a method 20 for broadcasting performed in a network node 11. The network node 11 is configured to broadcast information within a coverage area by using a directional beam. The method 20 comprises: determining 21 one or more directions for the directional beam based on a priori information about receiver 141 . . . , 14i . . . , 14N locations within the coverage area, and broadcasting 22 the information in the determined one or more directions.

Abstract: A first network node (NN) (110) and a method for shortcutting a communication path between a first user equipment (UE) (120) and a second UE (122). When information about the second UE is in a set of information, which set of information (110S) comprises information about one or more downstream reachable UEs (120,122), and when the second UE is connected to the first NN, the data is transmitted to the second UE, whereby the path is shortcut. Furthermore, when information about the second UE is in the set of information and when a third NN (114) is downstream connected to the first NN, the data is transmitted to the third NN, whereby the path is shortcut.

Abstract: The disclosure relates to radio access systems, and more specifically to methods for media access in radio access systems. The disclosure relates to a method, performed in a first node in a wireless communication system, of accessing a shared media for directive signal transmission from the first node, the method comprises three steps. The first step is receiving, from a second node, a pilot signal announcing a directive signal transmission to or from the second node. The second step is predicting based on information in the received pilot signal, a collision rate between an intended directive signal transmission from the first node and the announced directive signal transmission, the information defining the channel resources used by the announced directive signal transmission and the third step is accessing the shared media based on the predicted collision rate.

Abstract: The present disclosure proposes a solution that increases the efficiency of the MAC and use of the spectrum by indicating in a receiver channel reservation, RCR, signal that the channel is reserved only at the receiver side of a link, during the planned reception by the receiver. The disclosure relates to a method, performed in a first node in a wireless communication system, of reserving a shared media for signal reception, the method comprising defining, parts of the shared media to reserve for signal reception in the first node, configuring a receiver channel reservation signal to indicate the defined parts and transmitting the receiver channel reservation signal to reserve the shared media. The disclosure also relates to a method in a node receiving a receiver channel reservation, RCR, signal and to the corresponding network nodes.

Abstract: The disclosure provides a method for facilitating timing synchronization in a network. The method comprises, at a network node: updating a timing value of the network node iteratively based on synchronization signals from neighboring network nodes; determining that the timing value is in a stable state; calculating a bias due to propagation delays of the synchronization signals based on a number of timing values obtained in iterations of said updating; and correcting the timing value based on the bias.

Abstract: The present disclosure presents a method performed in a first node in a wireless communication system, of accessing a shared channel for transmission from the first node to at least one second node. The method comprises the step of receiving, from a third node a pilot signal announcing reception in the third node, wherein the pilot signal comprises information enabling estimation of a channel response from the first node to the third node; estimating, using the pilot signal, a channel response from the first node to the third node and predicting, based on the estimated channel response, an interference level at the receiver of the third node of a directive transmission from the first node to the second node; and accessing the shared channel based on the predicted interference level.

Abstract: A first network node (NN) (110) and a method for shortcutting a communication path between a first user equipment (UE) (120) and a second UE (122). When information about the second UE is in a set of information, which set of information (110S) comprises information about one or more downstream reachable UEs (120,122), and when the second UE is connected to the first NN, the data is transmitted to the second UE, whereby the path is shortcut. Furthermore, when information about the second UE is in the set of information and when a third NN (114) is downstream connected to the first NN, the data is transmitted to the third NN, whereby the path is shortcut.

Abstract: Embodiments comprise a method and a corresponding device (11) for facilitating connection to a wireless hotspot (5) with associated coverage area (7). The device (11) obtains local CPC information (27) which relates to the hotspot (5). The device (11) then transmits the local CPC information (27) in an area that corresponds to the coverage area (7) of the hotspot (5) The local CPC information (27) may toe transmitted using radio resources which have been reserved for use in outband broadcast. CPC transmissions. The transmission of local CPC information (27) may fee performed using a resource sharing scheme (200b), Embodiments further comprise a method in a user equipment and a corresponding user equipment (9). The user equipment (9) receives, a transmission (69;87) of local CPC information (27) relating to a wireless hotspot (5) and may then use the received local CPC information to efficiently connect (71; 93) to the hotspot (5).

Abstract: A local radio access information transmitter (LRAIT) may be used in a communications area serviced by multiple different radio access technologies (RATs) allocated to different radio resources in different locations in the communications area. Each RAT is associated with RAT radio transceiver(s) for serving UEs in the communications area. The LRAIT is in addition to the RAT transceivers and located near a hotspot service area in the communications area. The LRAIT determines local radio access information (LRAI) including different RATs available in the hotspot service area and frequenc(ies) of operation allocated to each RAT in the hotspot service area, sends a registration message to a wide area radio access information controller, and based on a response therefrom, determines what radio resources to use to transmit the LRAI signals. The LRAIT transmits the LRAI signals for receipt by UEs in the hotspot service area using those radio resources.

Abstract: The invention presents methods and corresponding device relating to cooperative spectrum sensing. First a candidate set of sensors that can participate in an occasion of cooperative spectrum sensing is obtained. A cost formula for calculating a cost associated with using sensors from the candidate set in the cooperative spectrum sensing is then defined (75; 107, 97). The candidate set is partitioned (29; 14, 145) into an active set and a passive set. The active set contains any sensor (s) from the candidate that is to participate in the cooperative spectrum sensing. The passive set includes any sensor (s) that is not to participate in the cooperative spectrum sensing. The partitioning of the candidate set is done by applying an optimization procedure (79, 81, 83; 111, 113, 115) which performs a constrained optimization of the cost in accordance with the defined cost formula.

Abstract: The present invention relates to the technical field of dynamic spectrum access. Synchronization of quiet periods for spectrum sensing can significantly benefit sharing of available secondary access spectrum between two or more wireless communication systems in the same geographic region. The object of the present invention is to provide a methodology by which quiet periods can be synchronized in time between different secondary access wireless communication systems. Quiet Period Clients (QPC) of secondary access wireless communication systems are adapted to send requests to a Quiet Period Server (QPS) to obtain a quiet period rule set. The QPC receives from the QPS an answer specifying the quiet period rule set, and optional quiet period synchronization information. The systems perform their transmissions in accordance with the received rules.

Abstract: A node (105, 200) for a communications system (100), arranged to operate as a secondary user of part of a frequency spectrum, comprising a detection unit (210) for detecting other secondary users (110) who use all or part of said frequency spectrum and for detecting changes in such other secondary user's usage of their part of the frequency spectrum. The node (105, 200) also comprises a signaling unit (225) for signaling to detected other secondary users (110) that the node (105, 200) wishes to operate within their frequency spectrum as a secondary user, by means of transmitting interference signals according to a predefined pattern in the frequency spectrum of detected other secondary users. The node also comprises a decision unit (230) for deciding how the node (105, 200) should arrange its secondary operation in the frequency spectrum together with detected other secondary users (110).

Abstract: The present invention relates to a method of a node such as a geo-location database, for controlling an aggregated interference generated by at least two white space units in at least one point in space for at least one frequency channel. A model of propagation channels from each of the at least two white space units to each of the at least one point comprises a variable with a lognormal distribution. The method comprises receiving (810) requests for usage of white space frequency channels from the at least two white space units, the requests comprising positions of the at least two white space units. The method also comprises determining (820) output power limits for the at least two white space units by maximizing a utility function while fulfilling a probabilistic constraint on the amount of aggregated interference generated in each of the at least one point, based on the received requests and on said model of propagation channels.

Abstract: The disclosure relates to a network node of a wireless network, and to a related method of controlling interference generated by at least one white space device controlled by the network node. The method comprises transmitting a request for information regarding channels available for secondary usage to the remote entity, and receiving information from the remote entity, the information indicating a channel available for secondary usage, a critical position associated with said channel, and an interference threshold for the critical position.

Abstract: According to aspects of the invention, a radio signal that constitutes a secondary use is provided with a predefined identifier (11) that identifies the radio signal as a secondary use. The identifier (11) can be any suitable signal characteristic that somehow can be detected by a suitable radio receiver. The identifier (11) enables identification of an origin of the radio signal. That is, whether it originates from a primary user or a secondary user. It therefore becomes possible to give all secondary users a more equal status, facilitating resource sharing. A transmitter is provided with an identifier inserter (25) for providing the identifier (11) in a transmitted radio signal. In a corresponding manner, a receiver is provided with identifier detector (29) for detecting a presence of the identifier in a received signal.

Abstract: In a communication system using aggregation of component carriers, a transmitter comprises a transmitting entity configured to transmit data messages on multiple component carriers. The transmission of the data messages is accomplished on the basis of a retransmission protocol. The retransmission protocol requires sending of an acknowledgement message in response to verifying correct receipt of a data message. A receiver comprises a receiving entity configured to receive the data messages on the basis of the retransmission protocol. In response to a decision to deactivate transmission on one of the aggregated component carriers, the retransmission protocol is triggered to retransmit those data messages for which no acknowledgement message of the retransmission protocol has been received. The retransmission is accomplished on at least one other of the component carriers.

Abstract: The disclosure relates to a white space device (WSD) of a secondary wireless network, and to a related method for transmitting a first signal on a channel available for secondary usage allocated to a primary wireless system. The method in the WSD comprises determining (410) a further channel used by the primary wireless system, that would be interfered by a transmission of the first signal on the channel available for secondary usage, retrieving (420) signal information associated with the determined further channel from the primary wireless system, transmitting (430) the first signal on the channel available for secondary usage, and transmitting (440) a second signal on the determined further channel based on the retrieved signal information, simultaneously with the first signal on the channel available for secondary usage* such that an interference generated in the primary wireless system by the first signal transmission is compensated for by the second signal transmission.

Abstract: A method and an arrangement (400) for determining an admission control threshold for use in an admission control procedure are provided. The admission control procedure manages a first spectrum resource (R1). The first spectrum resource (R1) has a first spectrum resource capacity and a first available spectrum resource capacity, wherein the first available spectrum resource capacity has a time dependence. In a step (220), the admission control threshold is determined based on the first spectrum resource capacity and a measure of the time dependence of the first available spectrum resource capacity.