283 results about "Channel occupancy" patented technology

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 relates to LTE-U uplink waveform and variable multi-subframe scheduling. Uplink waveforms for operating long term evolution (LTE) in an unlicensed band (i.e., long term evolution-unlicensed (LTE-U) communication) are disclosed. Carrier aggregation (CA) and standalone (SA) are disclosed. LTE on the licensed channel may provide both control and data, and LTE on the unlicensed channel may provide data. Managing variable transmission time interval (TTI) continuous transmission is disclosed for transmission over multiple subframes of an unlicensed carrier in LTE-U. Listen-before-talk (LBT) requirements of unlicensed carriers provide for additional channel occupancy constraints when scheduling resources for multiple UEs for variable TTI continuous uplink transmissions over multiple subframes. A joint control channel is disclosed that provides control information for all of the potentially available subframes to be scheduled for the uplink transmissions. In addition to management of the variable TTI continuous transmissions, adjustments to uplink signal parameters are also disclosed that address the constraints due to the LBT requirements of unlicensed carriers.

There is provided a method including obtaining, by a database entity, a-priori channel occupancy rate information of at least one channel from at least one of an entity of a primary system and an entity of a secondary system, wherein a database of the database entity includes information on white space channels, and availing the channel occupancy rate information to the secondary users in order to assist the secondary user to select a channel from the database.

For congestion control is an important aspect for PC5-based vehicle-to-everything (V2X) communication, a channel occupancy ratio (CR) has been introduced. CR is defined as the total number of sub-channels used by a user equipment (UE) for its transmissions divided by the total number of configured sub-channels over a measurement period of 1000 ms. The present invention provides a method and apparatus for calculating a CR over past multiple N subframes up to a subframe at which data is to be transmitted in sidelink. Accordingly, new sidelink transmission (or retransmission) can be considered for CR measurement.

A cognitive radio communication apparatus and method to control a sensing operation. The cognitive radio communication apparatus includes an information receiver to receive channel state information associated with a channel occupancy state of a primary system from at least one sensing node of a secondary system; a sensing control unit to control a sensing period of the at least one sensing node according to a change pattern of the channel occupancy state, based on the channel state information; and a control information transmitter to transmit control information associated with the controlled sensing period to at least one member node of the secondary system.

The invention provides a channel detection method of an LTE system during unlicensed frequency band operation, a channel detection system of the LTE system during unlicensed frequency band operation, a base station and a terminal. The method comprises the following steps: continuously performing channel detection according to the frame structure-based fixed cycle; setting load-based extra channel detection time when a data service reaches; and determining whether to transmit the data service according to a first detection result obtained by performing channel detection according to the fixed cycle and/or a second detection result obtained by performing channel detection according to the extra channel detection time. According to the technical scheme disclosed by the invention, the channel detection is simultaneously performed by virtue of the LBT mechanism for performing channel detection according to the frame structure-based fixed cycle and the load-based LBT mechanism for performing channel detection when the data service reaches, the channel occupancy can be further increased, and the time delay is reduced.

A method and an apparatus for transmitting a resource, and a method for the HARQ retransmission using an unlicensed band include an operation of performing clear channel assessment (CCA) for the unlicensed band; and an operation of occupying a channel of the unlicensed band according to the CCA and determining whether or not the resource is transmitted based on a position of a transmission time interval (TTI) within a channel occupancy time (COT) for the channel.

A CPU (42a) in each base station (BS) monitors the channel occupancy of each of a plurality of radio frequencies allocated to the base station (BS). When the difference between the channel occupancies of a plurality of radio frequencies allocated to a single base station (BS) becomes a predetermined state, the CPU (42a) switches the radio frequency as a candidate to be used by a predetermined base station (BS) of mobile stations (BS) that are present in the cell formed by the base station (BS) and set in the standby state to a radio frequency whose channel occupancy is in a predetermined state.

A predictive system and method for aircraft load balancing and handoff management leverages the aircraft flight plan as well as channel occupancy and loading information. Several novel techniques are applied to the load balancing and handoff management problem: Use of aircraft position and flight plan information to geographically and temporally predict the appropriate ground stations that the aircraft should connect to for handoff, and monitoring the load of ground stations and using the ground-requested, aircraft initiated handoff procedure to influence the aircraft to connect to lightly loaded ground stations.

The invention relates to the technical field of wireless communication, and provides a coexisting method for a Zigbee and a WiFi (Wireless Fidelity). The method comprises the following steps that the signal strength of the peripheral WiFi is scanned, and the occupancy status of channels of the WiFi in a space around the Zigbee is informed according to a scanning result; and the Zigbee judges channels that should be used by the Zigbee through the channel occupancy status scanned by the Zigbee and combination with the channel occupancy information of the WiFi, so that the mutual interference caused by overlapping the channels of the WiFi and the Zigbee is avoided.

This invention relates to wireless local network signal channel occupancy end time update and its status testing method, which comprises the following steps: a, in side station detecting signal channel transmission frame to analyze its content to determine current communication label and to compute current NAV; b, side station point records the label from step a and current NAV information or to update communication stored current NAV; c, selecting maximum one update station NAV from all communication to fulfill update of the signal channel occupancy end time.

A method determining indication of an occupancy level in a mobile communications system including a base station to communicate with a mobile communications device via a wireless interface provided by a first frequency channel allocated to mobile networks communications for the mobile communications system and by a shared channel which can be shared by the mobile communications system and by other wireless communications systems. The method includes: a mobile communications device: measuring, for each of plural first time periods within a second time period, a channel utilization on the shared channel; determining channel occupancy states for the shared channel for each of the first time periods based on the measured channel utilization; and determining an indication of an occupancy level for the shared channel for the second time period, the indication of an occupancy level determined based on the occupancy states for the shared channel for each first time period.

The invention discloses a method, a system and an apparatus for realizing always-online internet application. According to the method, terminal application clients are in long connection with a terminal application server through an always-online client and an always-online server; when application push notifications are generated by third party applications, after being processed by the always-online server, the push notifications are pushed to the always-online client and then distributed to the terminal application clients through the always-online client; the always-online client receives heartbeat connection from each terminal application client, converges the heartbeat connections of all the terminal application clients and transmits to the always-online server; and correspondingly, the always-online server distributes the received heartbeat connections to the corresponding terminal application servers. Therefore, channel occupancy is reduced and energy consumption of the terminal is lowered.

The invention requests to protect a multi-channel MAC protocol method based on a cluster mechanism. Firstly, each cluster head allocates time slots for cluster members according to position information of the cluster members, each cluster member reserves a channel in the own time slot, and the number of nodes accessed to the channels at the same time is reduced. Secondly, collisions are generated between neighbor nodes due to rapid movements of the nodes and then result in data loss, so, when the cluster heads allocate the channels for the cluster members, channel occupancy conditions of the neighbor nodes of the cluster members are considered. Finally, the cluster heads allocate the service channels for the cluster members and periodically broadcast a channel occupancy table, and the cluster members transmit data on the allocated channels. The provided multi-channel MAC protocol method based on the cluster mechanism obviously reduces the channel collision probability and improves reliability of data transmission.

The invention provides an automatic black broadcast analysis method and intelligent identification device based on multi-attribute analysis. The device comprises a monitoring command center and one or more remote monitoring stations, the remote monitoring station receives measurement data of a to-be-measured broadcast signal and uploads the measurement data to the monitoring command center to maintain a monitoring database MDB, meanwhile maintaining a station database SDB by the monitoring command center, and storing the legal station information of the area. According to the method and device, the frequency attributes, geographic position attributes, channel occupancy attributes, launch time rule attributes, bandwidth attributes, polarization manner attributes and voice attributes of frequency points are extracted from the collected measurement data, the validity of the attributes of the frequency points are automatically analyzed, and whether the broadcast signal is a black broadcast signal is comprehensively analyzed. By adoption of the method and device, the working efficiency of signal monitoring and collection in a black broadcast investigation process can be effectively improved, the accuracy of identifying suspected signals is improved, and the black broadcast investigation efficiency is improved.

The invention discloses a method for adjusting flow speed in a wireless local area network, which comprises the following steps: obtaining a channel occupancy rate; dynamically adjusting an actual flow threshold of a wireless terminal according to the channel occupancy rate; and carrying out speed restriction processing for the flow speed of the wireless terminal according to the actual flow threshold of the wireless terminal. The invention realizes the stable operation of a wireless network, so that all wireless terminals can normally use the wireless network.

The invention discloses a developed-mesopore active carbon for a super capacitor electrode and a preparation method thereof. In the activated carbon, the particle median particle size D50 is 4-15 [mu]m, the specific surface area is 1500-2500 m<2>/g, and the pore channel occupancy rate of the particle mesopore diameter of 2-3 nm is 20%-30%. The preparation process comprises the steps: selecting any one of petroleum pitch, coal pitch, mesophase pitch, petroleum coke, coal pitch coke, needle-shaped coke and anthracite as a raw material, placing in a vacuum furnace, carbonizing, firstly carrying out water vapor activation on the carbonized material, carrying out powder processing, then carrying out secondary activation by using an oxidizing atmosphere, and adjusting to obtain mesopores with appropriate proportion; and grading and carrying out magnetic removal process treatment on the secondary activated material to obtain the developed-mesopore active carbon. A prepared super capacitor has the advantages of high specific capacitance, long cycle life and stable product performance.

A method and apparatus for controlling voice quality in WLAN is provided. The codec bit rate of wireless terminals is adjusted by collecting channel state information for determining a channel occupation time of wireless terminals connected to an access point, adjusting the codec bit rate of the wireless terminals based on channel occupancy of the wireless terminals with respect to total channel capacity, which is determined using the channel state information, and transmitting the adjusted codec bit rate to each of the wireless terminals.

As is reflected in the disclosed method and apparatus, the present invention is a technique to account for the variation in channel occupancy of a particular terminal or terminals during the call admission process. Instead, a channel utilization manager accounts for the probabilistic nature of the call admission decision by using a pre-determined, statistically justified value to represent the channel occupancy. The “per-call” channel occupancy value is determined by a number of factors, including the shared-communications channel data rate. Channel occupancy is incorporated into one or more cumulative distribution functions (CDF), which are evaluated by the channel utilization manager as part of the call admission process. In turn, each channel-occupancy CDF of a shared-communications channel can be generated from a CDF of the terminals' data rates on that channel, which data rates can be determined analytically or empirically.

Methods for using a detector to monitor and detect channel occupancy are disclosed. The detector resides on a station within a network using a framed format having a periodic time structure. When non-cooperative transmissions are detected by the network, the detector assesses the availability of a backup channel enabling migration of the network. The backup channel serves to allow the network to migrate transparently when the current channel becomes unavailable. The backup channel, however, could be occupied by another network that results in the migrating network interfering with the network already using the backup channel. Thus, the detector detects active transmission sources on the backup channel to determine whether the backup channel is occupied. Methods for using the detector include scheduling detection intervals asynchronously. The asynchronous detection uses offsets from a reference point within a frame.

The invention relates to a channel allocation method for a low-orbit satellite communication system. By combining a self-adaptive channel reservation strategy with an enhanced queuing strategy, channel allocation schemes are dynamically adjusted according to different channel occupancy rates. The method comprises the following steps: carrying out pre-allocation to enable the number of fixed channels of satellite beam cells to be same, and dividing the channels in each satellite beam cell into common channels and preservation channels; sending a resource request to a satellite control center by virtue of a terminal; judging whether the common channels are idle by virtue of the low-orbit satellite communication system after resource request arrives; and if yes, determining different channel allocation schemes according to the occupancy rate of the common channels, and carrying out channel allocation. By combining the self-adaptive channel reservation strategy with the enhanced queuing strategy, the channel resources are adequately utilized, and requirements of different users are furthest met, so that the integral service quality of the system is in a relatively high level under the condition that a small part of low priority businesses are inevitably sacrificed.

The present disclosure provides an electronic device and method for wireless communication, and a computer readable storage medium. The electronic device comprising: a processing circuit configured to: generate an indication indicating whether to allow sharing of a channel occupancy time of the user equipment with other user equipment in a case where a user equipment successfully accesses an unlicensed frequency band; and transmit the indication to a base station or other user equipment.

A method for a user equipment (UE) which communicates with a base station is described. The method may comprise acquiring radio resource control (RRC) configuration information. The RRC configuration information may indicate a configuration of downlink control (DCI) format 2_0. The method may also comprise monitoring a physical downlink control channel (PDCCH) with the DCI format 2_0. The DCI format 2_0 may include a first information field. The first information field may indicate a remaining channel occupancy duration. The remaining channel occupancy duration may be expressed as the number of OFDM symbol(s) starting from a slot where the DCI format 2_0 is detected.

In a network including multiple nodes communicating on a channel using CSMA protocol, where each node accesses the channel by occupying at least one time slot in a contention interval, the invention includes transmitting and receiving, in a node, messages on the channel during a first time interval. The invention counts, in the node, at least one of the transmitted and received messages during the first time interval. The invention determines, in the node, a channel occupancy during the first time interval, after counting the messages, and then adaptively adjusts, in the node, the contention interval based on the channel occupancy.