Abstract: The present disclosure relates to transmitting synchronization signals and in particular to so called beam sweep. In particular the disclosure relates to methods for providing synchronization using synchronization sequences that are transmitted at different points in time. The disclosure also relates to corresponding devices and computer programs. A method in a network node, for transmitting synchronization sequences of a synchronization signal to one or more receiving wireless devices, comprises determining multiple synchronization sequences, such that each synchronization sequence comprises a respective timing indication, whereby each synchronization sequence enables determination of a time of an event in a receiving wireless device and transmitting the synchronization sequences to the one or more wireless devices, at different points in time.

Abstract: An access node, AN, may be configured to communicate wirelessly with a wireless device (WD). The AN can transmit a first synchronization signal block having a first format. The AN can also transmit a second synchronization signal block of a second format, the first synchronization signal block including a first format different from the format of the second synchronization signal block. The first synchronization signal block can include an extended primary synchronization signal block that can be used to synchronize disadvantaged user equipment (e.g., user equipment experiencing low signal-to-noise ratio).

Abstract: Methods, apparatuses, and computer program products provide for routing information between nodes of a radio network. A quality metric is received at a network node that indicates a quality of at least one channel of a plurality of channels in the network. A virtual network is generated that includes one or more routes between a source node and a destination node. A modified virtual network is generated based at least in part on the quality metric and the virtual network, and is then used to determine an optimized route between the source node and destination node. The determination includes a joint selection of one or more of a plurality of network nodes and the plurality of the channels.

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: 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 effects of interference between a communication system operating in a frequency area and another system sending out pulses affecting the frequency area can be handled by means of a communication unit (RBS1, MT1) for use in a first cellular communications system, in which at least one type of system sensitive data is transmitted at pre-determined points in time, said communications unit comprising transmitting means (14, 24) arranged to transmit said system sensitive data and processing means (11, 21) arranged to control the transmitting means to transmit the system sensitive data at new points in time different from the predetermined points in time, instead of at said predetermined points in time, to reduce the risk of interference from a second system operating in the same frequency range as the first cellular communications system.

Abstract: Systems and methods for computing and/or utilizing mutual information based link metrics for a link in a wireless mesh network are disclosed. In one embodiment, one or more mutual information values are computed for a link between a transmitter of a first network node and a receiver of a second network node in a wireless mesh network. Each of the one or more mutual information values is computed for a different hypothesized transmission mode for the link. One or more link metrics for the link are computed as a function of the mutual information values, where each link metric is computed based on a different one of the one or more mutual information values. In this manner, a link metric is computed for each of the one or more hypothesized transmission modes for the link. At least one of the link metrics are then provided to a routing update module.

Abstract: Systems and methods relating to non-adaptive beam scanning in a wireless network are disclosed. In some embodiments, a method of operation of a transmit node to perform non-adaptive beam scanning for transmit beam patterns of the transmit node that partition a service coverage area of the transmit node into transmit partition cells is provided. The method transmitting a known signal using each of multiple scanning beam patterns for each of multiple beam scanning stages over non-overlapping radio resource slots. The scanning beam patterns for the beam scanning stages are such that each unique combination of scanning beam patterns consisting of one scanning beam pattern from each of the beam scanning stages corresponds to a different transmit beam pattern of the transmit node. This multi-stage beam scanning approach provides an exponentially more efficient process for beam scanning than the conventional Sequential Beam Sweeping (SBS) approach.

Abstract: Methods and network nodes (700-720) route communications between pairs of source and destination nodes through network nodes (700-720) of a wireless communication system. One resource slot of a wireless communication link is selected (1200) between each of a sequence of the network nodes (700-720) along a communication route between one pair of the source and destination nodes. Another resource slot of the wireless communication link is selected (1202) between at least some of the sequence of the network nodes (700-720) along the communication route between the one pair of the source and destination nodes. Selection of the other resource slot between each of the sequence of the network nodes along the communication route can be constrained to selection among resource slots that are available from only the sequence of the network nodes along the communication route between the one pair of the source and destination nodes.

Abstract: Systems and methods related to distributed route determination through a multi-hop wireless network based on multiple route metrics or properties are disclosed. In some embodiments, a method of operation of a network node comprises identifying a subset of neighbors of the network node in a wireless network based on: (a) link weight(s) for links from the network node to at least some of the neighbors of the network node with respect to route metric(s) and (b) defined limit(s) for the route metric(s). The method further comprises obtaining second link weights for the links from the network node to at least the subset of the neighbors with respect to a second route metric, and identifying from the subset of the neighbors, an optimal next hop neighbor for the network node. In this manner, multiple route metrics are taken into consideration in manner that is computationally efficient.

Abstract: The invention provides a scheduling of data blocks on multiple data carriers and a selection of data carrier to listen to. A transmitting unit simultaneously transmits, during a communication session with at least one participating receiving unit, at least a first data block on a first data carrier and a second data block on a second data carrier. The receiving unit selects which of these data carriers to listen to, i.e. whether to receive the first or second data block, based on a reception quality of a previously received data block. Furthermore, at least one of the first and second data block is based on information common to the data block and the previous data block, e.g. the first or second data block could be re-transmitted version of the previous block.

Abstract: Systems and methods for computing and/or utilizing mutual information based link metrics for a link in a wireless mesh network are disclosed. In one embodiment, one or more mutual information values are computed for a link between a transmitter of a first network node and a receiver of a second network node in a wireless mesh network. Each of the one or more mutual information values is computed for a different hypothesized transmission mode for the link. One or more link metrics for the link are computed as a function of the mutual information values, where each link metric is computed based on a different one of the one or more mutual information values. In this manner, a link metric is computed for each of the one or more hypothesized transmission modes for the link. At least one of the link metrics are then provided to a routing update module.

Abstract: Interference between a communication system operating in a frequency area and another system sending out pulses affecting the frequency area can be handled by means of a communication unit (RBS 1. MT1) for use in a cellular communications system, said communications unit comprising detecting means (10, 20) for determining the presence of at least one interfering pulse from another system affecting the signalling in the cellular communications system, and processing means (11, 21) for selecting and taking appropriate action based on the detected at least one interfering pulse.

Abstract: A communication method for use in a first cellular communications system is proposed for minimizing the interference caused by strong interfering pulses in the same frequency band as the system or an adjacent frequency band. The method comprises the steps of Receiving an incoming signal Bandpass filtering the incoming signal to filter out a first frequency band (B1) used by the communications system and forwarding the bandpass filtered signal to a receiver unit (35) for processing and forwarding the processed signal to a signal detector (37) arranged to detect the wanted signal. Redirecting a fraction of the received signal and detecting the power of the redirected fraction. Using the detected power to modify the function of the signal detector (37).

Abstract: When transmitting data from a transmission unit to a reception unit over a channel in a wireless communication system, it has been observed that there are inherent losses in throughput, especially for a channel experiencing high channel quality variations over its frequency range. To improve the throughput over such a channel, it is proposed to: estimate the quality of each subchannel of a channel. classify the subchannels into a number of quality groups based on the estimated quality, and select a code rate per quality group. This selected code rate per quality group is then used when a data word to be transmitted is coded. Simulations have shown that by grouping the subchannels into a limited number of groups, for example one to four groups depending on the channel quality variation, a high throughput could be achieved with a minimum of signaling cost in the form of extra overhead.

Abstract: Peer-to-peer communication between user terminals in a licensed spectrum is enabled by a method comprising the following steps: —communicating directly, peer-to-peer, between the first and the second mobile terminal, and —disconnecting the peer-to-peer communication in dependence of control signals received or not received from the base station. Thus, according to the invention, the network is enabled to control the peer-to-peer communication between two user terminals.

Abstract: The present invention aims to provide a method for fast and exact ML low-complexity demodulation in for example MIMO systems. The present invention relates to a method and arrangement for processing signals, especially a Maximum Likelihood (ML) demodulation of Quadrature Amplitude Modulation (QAM) signals, in a digital communications system, having a number of transmit antennas transmitting nT symbols, the method comprises the steps of: using xm, denoting symbols transmitted, wherein m=1 . . . nT, given a channel, selecting i and j and making pre-calculations facilitating finding a best combination of Xl . . . Xi?1, Xi+1 . . . Xj?1, Xj+1 . . . XnT for any given Xi, Xj and a received signal, going through every combination X1 . . . Xi?1, Xi+1 . . . Xj?1, Xj+1 . . . XnT and projecting in a number of directions for each of said combinations and generating a list of candidate combinations of Xi and Xj for each combination X1 . . . Xi?1, Xi+1 . . . Xj?1, Xj+1 . . .

Abstract: The object of the present invention is to provide a mechanism for a more efficient carrier search. The object is achieved by a method for sending a signal in a first node. The first node communicates with a second node via radio communication, which radio communication is performed by multi carrier transmission. The first node uses a carrier, being associated with a frequency range. The method comprises the step of transmitting an end-marker signal within or close to the frequency range. The end-marker signal is intended to be received and used by the second node for identifying the frequency range of the used carrier.

Abstract: A scheduling algorithm is disclosed that allows mobile units, participating in an ongoing communications session, to temporary perform channel-demanding communications operations without ending the session and that is useful in the case of no free radio channels. The algorithm is based on selecting a radio channel for transmitting a radio block based on information of a previous radio channel, no which a previous radio block has been transmitted. The radio block and the previous radio block are based on common information. A mobile unit participating in the communications session selects whether to perform any channel-demanding communications operations on the selected radio channel. By limiting any such other channel-demanding operations to only the selected radio channel, the probability of loss of useful data for the mobile unit during the communications session is minimized.

Abstract: Signal properties of a signal section (106) comprising a training sequence are compared with corresponding signal properties of other signal sections (108, 110). At a too large discrepancy, co-sequence interference is concluded to be present. The used signal property can preferably be a signal-to-noise ratio measure or a signal statistics measure. If the existence of co-sequence interference (102) is concluded, measures can be taken to avoid such interference and to mitigate the effects of the interference. A method for mitigating effects of co-sequence interference in channel estimation comprises a joint detection and estimation procedure performed under constrictions assuming presence of co-sequence interference.