388 results about "Shared spectrum" patented technology

A system and method of operation for efficiently reusing and/or sharing at least a portion of the frequency spectrum between a first satellite spot beam and a second satellite spot beam, and/or an underlay terrestrial network associated with a second satellite spot beam. The spectrum is efficiently reused and/or shared between respective spot beams and/or associated underlay terrestrial systems in a manner minimizes interference between the respective satellite and terrestrial systems.

A method and system for sharing spectrum in a wireless communications network are disclosed. As one example, a method for sharing spectrum is disclosed, which includes the steps of determining if two base stations in the wireless communications network are to share a frequency spectrum, and if two base stations in the wireless communications network are to share a frequency spectrum, determining if the two base stations in the wireless communications network have non-overlapping wireless communications coverage. Also, if the two base stations in the wireless communications network have non-overlapping wireless communications coverage, determining if a first mobile communications unit associated with a first base station of the two base stations has wireless communications coverage that overlaps with wireless communications coverage of a second mobile communications unit associated with a second base station of the two base stations, and if the first mobile communications unit has wireless communications coverage that overlaps with wireless communications coverage of the second mobile communications unit, enabling the two base stations to use a synchronized parallel operation spectrum sharing mode for communications. Also, a Contention-for-being-Master approach is disclosed as one primary method for sharing spectrum, which can be treated separately from all other contention methods, or combined with the exemplary contention method disclosed herein.

A mobile device obtains data to be wirelessly transmitted over a shared spectrum in an uplink channel to a base station. The uplink channel is formatted with a frame/subframe structure with a predetermined timing. The mobile device determines whether the shared spectrum is free for transmission according to a Listen Before Transmit procedure. When the shared spectrum is free for transmission, the mobile device selects a start time in the uplink channel that mitigates interference from other mobile devices in proximity to the mobile device. Beginning at the start time, the mobile device transmits the data over the shared spectrum in the uplink channel to the base station.

Methods and apparatuses are disclosed that provide flexible use of a shared radio resource. An apparatus determines from monitoring signal energy on a shared radio resource whether other transmitters are present. A predetermined set of time division duplex (TDD) signaling patterns are identified. A correlation is performed between signal energy received on the shared radio resource and the predetermined TDD signaling patterns. The apparatus may then determine a TDD signaling pattern that may reduce or avoid interference with any other transmitters using the shared resource. The shared radio resource may be, for example, a shared frequency spectrum. Efficient allocation of radio resources among apparatuses such as radio transceivers, without fixed time references or predetermined patterns, may be obtained. The radio transceivers may be base stations or mobile user equipment in a wireless communications system. The apparatus may be an integrated circuit, a portion thereof, or chipset.

Methods, systems, and devices for radio resource management (RRM) measurement and reporting for license assisted access (LAA) cells operating in unlicensed or shared frequency spectrum are described. A user equipment (UE) may receive an RRM measurement configuration including a channel occupancy parameter for measuring neighbor cells of a shared frequency band. The channel occupancy parameter may be used to determine a channel occupancy metric that may be sent to a base station for cell selection. The channel occupancy metric may include an averaged or filtered received signal strength and may be reported for serving cells and/or intra-frequency neighbor cells. A base station may further configure a UE with a discovery reference signals (DRS) measurement timing configuration (DMTC), which may include an extended DMTC search window. The UE may search for DRS transmissions from neighbor cells according to the DMTC.

The invention discloses a D2D resource allocation method based on multi-agent deep reinforcement learning, and belongs to the field of wireless communication. The method comprises the following steps:firstly, constructing a heterogeneous network model of a cellular network and D2D communication shared spectrum; establishing a signal to interference plus noise ratio (SINR) of a D2D receiving userand an SINR of a cellular user based on the existing interference, respectively calculating unit bandwidth communication rates of a cellular link and a D2D link, and constructing a D2D resource allocation optimization model in a heterogeneous network by taking the maximum system capacity as an optimization target; For the time slot t, constructing a deep reinforcement learning model of each D2D communication pair on the basis of the D2D resource allocation optimization model; And respectively extracting respective state feature vectors from each D2D communication pair in the subsequent time slot, and inputting the state feature vectors into the trained deep reinforcement learning model to obtain a resource allocation scheme of each D2D communication pair. According to the invention, spectrum allocation and transmission power are optimized, the system capacity is maximized, and a low-complexity resource allocation algorithm is provided.

Methods, systems, and devices are described for wireless communication. A device may use enhanced reporting mechanisms to support control information reporting on shared spectrum. In some cases, a device may utilize enhanced component carriers (eCCs) for data transmissions. In one example, the device may transmit control information (e.g., ACK/NACK, CSI, etc.) to a corresponding device using a CCA exempt transmission (CET). In another example, a device may report control information quasi-periodically. For instance, a device may be assigned a specified interval and a control feedback window for reporting control information (e.g., CSI). The window may provide a duration prior and subsequent to the specified interval during which a UE may transmit control information. For example, the device may perform a CCA reserving the channel for a duration that does not include the specified interval but may transmit feedback information based on determining the specified interval falls within the assigned window.

The embodiment of the invention discloses a method, equipment and a system for sharing a frequency spectrum resource, which relate to the field of wireless communication and are used for realizing the sharing of a dynamic frequency spectrum resource among different mobile honeycomb networks on the basis of ensuring the network coverage and the service continuity. The method comprises the following steps: dividing the frequency spectrum resource into a basic frequency band and a dynamic frequency band, wherein the basic frequency band is used for ensuring the network coverage and the service continuity of at least two networks of the sharing frequency spectrum resource; fixedly distributing the basic frequency band in the frequency spectrum resource to at least two networks in a static mode, and distributing the dynamic frequency band in the frequency spectrum resource to at least two networks in a dynamic mode; and transmitting the frequency spectrum resource distribution information of the basic frequency band and the frequency spectrum resource distribution information of the dynamic frequency band to a base station so as to be used for the frequency spectrum resource allocation of the base station. The invention is suitable for mobile honeycomb networks, such as GSM, UMTS, LTE, CDMA2000, WiMAX and the like.

For controlling a wireless transmission of a network element of a radio access network where signal propagation is unknown, wherein the network element is configured to inhibit use of a licensed shared access spectrum, interference levels in predefined reservation zones are determined, which are introduced by the network element when using the licensed shared access spectrum. It is checked whether or not the interference levels violate agreed interference levels in the predefined reservation zones of the licensed shared access spectrum, and the network element is configured to allow use of the licensed shared access spectrum in case the interference levels do not violate the agreed interference levels in the predefined reservation zones.

A method of operating a long term evolution (LTE) communication system on a shared frequency spectrum is disclosed. A user equipment (UE) is initialized on an LTE frequency band. A base station (eNB) monitors the shared frequency spectrum to determine if it is BUSY. The eNB transmits to the UE on the shared frequency spectrum if it is not BUSY. The eNB waits for a first time if it is BUSY and directs the UE to vacate the shared frequency spectrum after the first time.

A universal broadband broadcasting service is provided. A spectrum-sharing database stores attributes associated with a shared spectrum, a policy controller controls access to the shared spectrum by broadcast service entities, and a gateway receives IP multicast traffic from the broadcast service entities and communicates the IP multicast traffic to a broadcast single frequency network.

A network may use enhanced sounding reference signal (SRS) transmission techniques to support reference signal transmissions over shared spectrum. For example, a wireless device may receive an uplink grant and an indicator. The uplink grant may include an uplink resource allocation to the wireless device and the indicator may alert the device of a forthcoming reference signal transmission. The wireless device may use the uplink grant and the indicator to determine a reference signal transmission period relative to the resources assigned in the uplink grant. For example, the wireless device may determine that the reference signal transmission period is prior to, during, or subsequent to the uplink transmission period. In some cases, a wireless device may be aperiodically or periodically scheduled for reference signal transmissions.

A time division duplex using code division multiple access user equipment receives a plurality of data signals in a time slot. Each data signal experiences a similar channel response. The user equipment receives a combined signal over the shared spectrum in a time slot. The combined signal comprises the plurality of data signals. The combined signal is sampled at a multiple of a chip rate of the combined signal. The similar channel response is estimated. A channel response matrix or a channel correlation matrix is constructed based on in part the estimated channel response. A spread data vector is determined based on in part a fast fourier transform (FFT) decomposition of a circulant version of the channel response or channel correlation matrix. The spread data vector is despread to recover data from the matrix.

Techniques for co-existence between wireless Radio Access Technologies (RATs) are disclosed. During an active period of a Discontinuous Transmission (DTX) communication pattern, a first signal may be transmitted during a first subframe and a second signal may be transmitted during a second subframe, while during an inactive period the first signal may be transmitted during the first subframe and the second signal may be omitted during the second subframe. Retransmission of one or more packets may take place over a subset of less than all retransmission opportunities based on the DTX communication pattern. A Secondary Cell (SCell) may be reconfigured as the Primary Cell (PCell) and the PCell may be reconfigured as the SCell for one or more access terminals based on a load balancing condition or a channel selection condition.

Techniques are disclosed relating to spectrum sharing between different radio access technologies. In some embodiments, a broadcast base station is configured to wirelessly broadcast audio and video data to a plurality of broadcast receiver devices using a particular frequency band. In these embodiments, the broadcast base station is configured to discontinue broadcasting in the particular frequency band during a scheduled time interval, to enable one or more cellular base stations to perform bi-directional packet-switched wireless data communications using the particular frequency band.

A wireless interface circuit transceives packetized data between a host module and a first external device using a frequency spectrum, wherein the packetized data is formatted in accordance with a first wireless communication protocol and wherein the packetized data includes a request from the first external device to use at least a potion of the frequency spectrum for communication via a second wireless communication protocol. A coexistence management module generates a wireless interface schedule that includes a least one contention free period reserved for communication via the second wireless communication protocol, and generates schedule data, based on the wireless interface schedule, for transmission to a plurality of external devices including the first external device.

The invention discloses a measurement method in an unlicensed spectrum and equipment which are used for solving a problem that the network cannot accurately schedule data transmission of LTE (Long Term Evolution) UE on an unlicensed carrier because the LTE UE needs to share the spectrum in a time division manner with other wireless communication technologies on the unlicensed spectrum. The measurement method comprises the steps that the UE performs LBT on the unlicensed spectrum when determining that uplink transmission needs to be performed and calculates an LBT result; and the UE sends reporting information related with the LBT result calculated by the UE when determining that a reporting condition is met. The UE sends the reporting information related with the LBT result calculated by the UE to network equipment so as to enable the network equipment to determine whether the UE is suitable to work in the corresponding unlicensed spectrum cell or not according to the LBT result calculated by the UE.

The invention discloses a method and a device for distributing spectrum resources. The method for distributing the spectrum resources comprises the following steps of: dividing spectrum resources which can be used into basic spectrum resources and shared spectrum resources, monitoring the shared spectrum resources when the capacity of wireless access equipment needs to be expanded, and also using the idle shared spectrum resources. By the method disclosed by the invention, all the spectrum resources distributed to a wireless access technology to which a plurality of wireless access equipment belongs for use are flexibly shared by the wireless access equipment, and the condition that continuous business service is provided to a terminal is ensured by the wireless access equipment through the basic spectrum resources. Meanwhile, a business with high rate is also provided by the time-sharing shared use of the shared spectrum resources, and the requirement of the business to large bandwidth is met. Moreover, the phenomenon of interference between the wireless access equipment cannot be caused.

Aspects of the present disclosure relate to methods and apparatus for assigning channels to networks in a group based on network coverage overlap and network weights. An example method generally includes determining whether channels are available for allocation at each network represented by a node in a network overlap graph, wherein each node in the graph is associated with an assigned channel in a shared spectrum, and for each network in the graph for which channels are available for allocation, identifying channels that are available for allocation to the network, and assigning at least one of the available channels to the network based, at least in part, on a weighting associated with the network.

Techniques for reservation coordination and related operations in shared spectrum are disclosed. Communication over a communication medium may be performed in accordance with a first Radio Access Technology (RAT) and in accordance with a communication pattern of active periods and inactive periods of communication. A channel reservation message may be transmitted in accordance with a second RAT to reserve the communication medium for one of the active periods. The channel reservation message may be transmitted randomly at a plurality of successive burst slots. In addition or as an alternative, one or more medium access parameters associated with the channel reservation message may be set to a value below a threshold associated with aggressive contention.

Apparatus and method for communication are provided. The solution includes controlling a transceiver to determine free frequency blocks on a shared spectrum and controlling a transceiver to map synchronization control channels, downlink and uplink physical control channels, physical broadcast channel and random access channel on found free frequency blocks.

Certain aspects of the present disclosure relate to adapting transmitter configuration for efficient concurrent primary user detection through adaptive self-interference cancellation. A wireless transmitting device may schedule a transmission in a shared spectrum. The device may scan at least a portion of the shared spectrum during the transmission to receive a signal. Interference caused by the transmission may he cancelled from the received signal using self-interference cancellation circuitry. The device may determine whether the received signal indicates usage by a primary user of the shared spectrum. In an aspect, the transmission may be a SISO transmission. In another aspect, carrier aggregation may be used for the transmission and a potential carrier may be subject to primary user detection. The device may determine a self-interference cancellation complexity for a combination of carriers including the potential carrier, and may select one or more carriers for aggregation based on the self-interference cancellation complexity.

The invention aims at providing a spectrum sharing method based on auction theory and compensation stimulation in a cognitive radio system. The method aims at primary and secondary user spectrum sharing problems, the cooperative relationship between secondary users is introduced on the basis of a simplified video channel generator (VCG) auction model, in addition, a currency compensation stimulation principle is utilized for building an expansive non-cooperative game model including negotiation and consulting links. The cooperative relationship between the secondary users is discussed in a non-cooperative game framework by the game model, the game is carried out through the specific cooperative strategy, the decision mode characteristic of automatic implementation of the non-cooperative game model is realized, and the fairness characteristic of an oligarch combination model is also realized. In addition, because the adopted communication system model is the auction model, the primary users can adopts preserved bandwidth measures for ensuring that the self performance is protected from being influenced by secondary user spectrum sharing, and the spectrum shearing environment between the primary users and the secondary users is better ensured.

A communication system, includes a satellite receiver in operable communication with a central server, a cellular node configured to operate within a proximity of the satellite receiver, and at least one mobile communication device configured to communicate (i) with the cellular node, (ii) within the proximity of the satellite receiver, and (iii) using a transmission signal capable of causing interference to the satellite receiver. The satellite receiver is configured to detect a repeating portion of the transmission signal and determine a potential for interference from the at least one mobile communication device based on the detected repeating portion.