54results about How to "Avoid transmission conflicts" patented technology

System and method for performing clear channel assessment for simultaneous transmission in a device implementing multiple wireless protocols. The system may include first and second wireless protocol circuitry configured to generate first and second signals, respectively, for wireless transmission according to first and second wireless protocols, respectively. A first in-band signal strength threshold and a second in-band signal strength threshold may be maintained by the first wireless protocol circuitry. It may be determined whether the first or second in-band signal strength threshold should be used in performing the clear channel assessment. Clear channel assessment may be performed using the determined in-band signal strength threshold. Performing clear channel assessment may include comparing an ambient signal strength on a channel with the determined in-band signal strength threshold. The first wireless protocol circuitry may be configured to determine whether to wirelessly transmit first signals based on the clear channel assessment.

If own station detects that a slot S2 previously reserved for own transmission has been occupied by another station when transmitting a message at a current slot S3, the own station sets the occupied slot to a time-out value of zero S0 upon transmitting the message at the current slot S3. At the same time, the own station re-reserves a new slot S5 within an SI in a succeeding frame so that transmission from the own station at the new slot S5 does not conflict with transmission from the other station at the occupied slot, now reserved by other station as slot A.

The embodiment of the invention provides a method for realizing data transmission of a time-sensitive network, related equipment and a medium. One of the methods includes: in a protocol data unit session management process of a user terminal, the session management function equipment reports port management parameters to the centralized network controller; wherein the port management parameters comprise an identifier of the user terminal, a first port list provided by a device side time sensitive network converter connected with the user terminal, and a second port list provided by a network time sensitive network converter connected with a user plane function device; and the session management function device receives port configuration parameters issued by the centralized network controller, wherein the port configuration parameters comprise port resources associated with the protocol data unit session. According to the method, the problems of transmission conflicts, poor port configuration and the like can be effectively solved, and the smooth data transmission process of the time-sensitive network is ensured.

A contention based resource configuration method is disclosed. The method includes: configuring, by a network device, a contention based resource parameter, wherein the contention based resource parameter comprises one or any combination of the following: a period and / or a frequency of a contention based resource block, the number of contention based resource blocks allocated once, a size of the contention based resource block, a modulation and coding scheme, and expected reception power; and notifying, by the network device, a user equipment of the contention based resource parameter. Through the technical solutions provided by the embodiments of the present invention, a network side may allocate a contention based resource more properly, and the user equipment may know the contention based resource parameter and use the contention based resource more properly and flexibly.

A technique is disclosed which achieves both a reduction of the power consumption and an efficient access control at each of wireless nodes in a wireless communication system. According to this technique, a given period at the beginning of which a beacon is transmitted from a gateway (GW) (100) is specified that it is divided into an active interval during which each wireless node (P2P tag) transmits / receives frames and a sleep interval during which the frame transmission / reception operations are inactive. Further, the active interval is divided into a plurality of timeslots having a fixed length, and in particular, divided into intervals during which different types, that is, the GW, fixed nodes (P2P-S tags) and mobile nodes (P2P-M tags) may perform their respective frame transmissions. Each P2P tag selects, from the intervals of its own type, a timeslot at random and uses the selected timeslot to be on standby for a random standby time and then transmit a frame including information to be used for determining the ID of that P2P tag, the selected timeslot and the standby time.

The embodiment of the invention provides a UCI transmission method, a UCI receiving method, a terminal and network equipment. The method comprises the step of multiplexing afirst UCI and a second UCIin the same channel for transmission under the condition that transmission time domain resources of a first uplink channel for bearing the first UCI and transmission time domain resources of a seconduplink channel for bearing the second UCI are overlapped. According to the embodiment of the invention, the UCI transmission conflict can be avoided so as to improve the UCI transmission effect of theterminal.

Provided is a data transmission method and device for a direct memory access controller. When multiple system-to-equipment DMA engines send reading request commands to a system through an arbitration mechanism, the system sends first messages or reading operation commands to be sent to equipment to a receiving massage distribution module, and the receiving massage distribution module analyzes the request identifiers of the first messages or the request identifiers of the reading operation commands, and sends the first messages or the reading operation commands to the corresponding system-to-equipment DMA engines according to the request identifiers; multiple equipment-to-system DMA engines send writing request commands to the system through the arbitration mechanism, the system sends writing operation commands to the receiving massage distribution module, and then transmits the writing operation commands to the equipment-to-system DMA engines, and then the equipment-to-system DMA engines send second messages to the system through the arbitration mechanism. Multiple sets of parallel DMA engines are adopted to work simultaneously, the efficiency of DMA equipment for receiving and sending data can be improved remarkably, and system performance can be improved.

The embodiment of the present invention provides an uplink data transmission method, device, apparatus, and system, and relates to the field of communication, wherein the method includesthat a first terminal sends uplink data of a first service type on a first uplink resource; the first terminal receives a scheduling indication sent by an access network access device, wherein the scheduling indication includes a starting location and a scheduling period of the semi-persistent scheduling; the first terminal stopping sending the uplink data of the first service type before the starting location;the first terminal, after the location, sends the uplink data of the first service type again according to the scheduling period. The first terminal determines the scheduling start location and the scheduling period according to the scheduling indication, and the first terminal performs the operations of suspending sending and resending according to the starting location, so that the uplink transmission of the first service type can avoid the uplink transmission of a second service type so as to ensure the transmission delay requirement of the second service type.

A system and method are described for reducing data transmission collisions in a shared transmission medium. In one embodiment, transmission priorities are set by means of priority-defining transmissions. In another embodiment, statistically equal access is assured by means of unique transmit start time slot pairs wherein the paired start time slots are substantially equally spaced in time from a center start time slot. In yet another embodiment, data transmission traffic analysis is used to set unique transmission start time slots or to select from pools of start time slots associated with classes of data to be transmitted, thus establishing relative preemption priorities. In still another embodiment, transmission begins in statically assigned start time slots that are subsets of an available array of transmission start time slots.

The invention provides an underwater acoustic network reservation multi-access method based on active time reversal, and relates to the technical field of underwater acoustic communication and underwater networks. Multiple access in the data transmission process among nodes, which is applicable to a distributed acoustic network MAC layer, is adopted, so that the transmission conflicts are avoided, the success probability and channel utilization rate of once transmission are substantially improved, and the networking energy consumption is lowered; by means of active TR space-time focusing and the space change characteristic of an underwater acoustic channel, the disadvantages are converted into advantages, the broadcasting characteristics of the underwater acoustic channel is weakened, the signal interference among adjacent links under a distributed multi-hop environment is effectively isolated, and the good transmission concealment and security of the multi-access method are realized by channel broadcasting weakening, so that the space multiplexing is improved, the network throughput is increased, the time delay of the system is shortened, and energy is saved.

The invention discloses a process layer tri-play message transport real-time scheduling method. The method includes the steps: slaves transmit time merging requests containing message feature information to a master; the master generates a message transport time node table according to the message transport feature data transmitted by all slaves, enters a mode of merging ready, and informs the slaves of time merging update information; the slaves update their message transport time node tables according to the time merging update information transmitted by the master; the master and the slaves both control message transport according to the same message transport time node tables. According to the method, the master is used to collect and analyze message transport feature data of all slaves in a network, message transport scheduling information, the message transport time node table, of the whole network is generated, the problem of possible message transport conflicts is prevented accordingly, and network delay stability, SV message uniformity and GOOSE message real-time transport are maximally increased.

The invention discloses a method and system for radio frequency location based on a token ring under an Internet of things environment. The method comprises the steps that a road sign network is composed of road sign nodes in a locating zone; after a token is generated by ASN, the token is broadcasted to the road sign network through a downlink channel; after the token is obtained by the road sign nodes in the road sign network, radio frequency signals are sent to locating nodes entering the locating zone through the downlink channel and the token is sent out; the radio frequency signals sent by the road sign nodes are received by the locating nodes, an RSSI value of each road sign node is obtained and sent to an ASN through an uplink channel, and each RSSI value is sent to a wireless locating server through the Internet by the ASN; the positions of the locating nodes are calculated through the wireless locating server according to the received RSSI values. The token is maintained by the ASN and transmitted among the road sign nodes, locating frames can be sent only after the token is obtained by the road sign nodes, and conflict is effectively avoided when data are sent among the road sign nodes.

Embodiments of the invention provide a communication method used for a TDD system and an apparatus thereof. The TDD system is configured with a channel of a first mode and a channel of a second mode. The channel of the second mode possesses shorter transmission interval time (TTI) compared to the channel of the first mode. The method comprises the following steps of receiving data from a downlink channel of the second mode; and in at least one special subframe, sending transmission confirmation information aiming at received data through using at least one uplink channel of the second mode. The embodiments of the invention provide a corresponding communication method and a method for coordinating different communication modes in the TDD system. Besides, the embodiments of the invention also provide a corresponding apparatus. In the technical scheme, time delay can be effectively reduced and simultaneously uplink and downlink transmission performance of the TDD system can be increased.

The embodiments of the present application disclose a data transmission method and related products. The data transmission method includes the steps: establishing an NAN (neighbor awareness network) between a first NAN device and at least one second NAN device; receiving a file transmission request sent by each second NAN device in the at least one second NAN device, and obtaining at least one file transmission request; acquiring receiving association information that the first NAN device receives the plurality of files; according to the transmission association information of the at least onesecond NAN device and the receiving association information, determining a target transmission policy of the plurality of files; transmitting a transmission instruction to each second NAN device of the at least one second NAN device; and receiving the plurality of files sent by the each second NAN device of the at least one second NAN device, thus enabling the first NAN device to solve the transmission conflicts among the plurality of files and improve the transmission efficiency when performing multi-file transmission with the plurality of NAN devices.

The invention provides a clustering-based Internet of Vehicles multi-channel allocation method, device and equipment. The method comprises the following steps: acquiring vehicle density information ofa current road section; determining a target communication mode corresponding to the vehicle density information according to the vehicle density information and a preset channel allocation rule, wherein the target communication mode comprises a target channel mode and a target communication radius, the preset channel allocation rule comprises a corresponding relationship between vehicle densityinformation and a channel mode and a corresponding relationship between the vehicle density information and a communication radius; and sending the target channel mode to the vehicles on the current road section, so as to enable the vehicles to communicate according to the target communication mode, thereby avoiding transmission conflicts while adapting to the density change of the vehicles, and improving the utilization rate of the channel.

A method of minimizing collisions in a CSMA / CA wireless data communication system using an access point includes sensing the presence of a client desirous of communication with the access point. A start time slot list having at least one unique start time slot during which the client may begin transmitting can be allocated. The start time slot list to the client can be transmitted. A transmission from the client can be received, wherein such transmission begins only during the start time slot(s) indicated by the start time slot list. Notably, the start time slot list can include a high-priority start time slot and a low-priority start time slot substantially equally displaced in time from a center start time slot. A client capable of receiving the start time slot list can select between the high-priority start time slot and the low-priority start time slot based on a randomizing function.

The invention provides a time reversal underwater acoustic network multiple access method for inter-link interference suppression, which adopts multiple access suitable for a distributed underwater acoustic network MAC (Media Access Control) layer and an inter-node data transmission process, avoids transmission conflicts, greatly improves the probability of one-time transmission success and the channel utilization rate, and reduces the networking energy consumption. Through the active TR space-time focusing property, the space-variant characteristic of an underwater acoustic channel is utilized, the disadvantages are converted into advantages, the broadcast characteristic of the underwater acoustic channel is weakened, and the key effect of effectively isolating signal interference betweenadjacent links in a distributed multi-hop environment is achieved; the power control method not only saves the transmitting power, but also greatly reduces the probability of conflict.

System and method for performing clear channel assessment for simultaneous transmission in a device implementing multiple wireless protocols. The system may include first and second wireless protocol circuitry configured to generate first and second signals, respectively, for wireless transmission according to first and second wireless protocols, respectively. A first in-band signal strength threshold and a second in-band signal strength threshold may be maintained by the first wireless protocol circuitry. It may be determined whether the first or second in-band signal strength threshold should be used in performing the clear channel assessment. Clear channel assessment may be performed using the determined in-band signal strength threshold. Performing clear channel assessment may include comparing an ambient signal strength on a channel with the determined in-band signal strength threshold. The first wireless protocol circuitry may be configured to determine whether to wirelessly transmit first signals based on the clear channel assessment.

The invention relates to the technical field of internet of things, and particularly relates to a long-distance wireless internet of things system. The long-distance wireless internet of things system comprises a gateway, and a plurality of nodes which are in a star distribution with the gateway; far-distance information transmission is implemented between the gateway and the nodes; the gateway comprises a long-distance wireless radio-frequency unit and a co-processor unit; the long-distance wireless radio-frequency unit includes an encoding-decoding module, a spread-spectrum modulation-demodulation module and an antenna; the co-processor unit is connected with the long-distance wireless radio-frequency unit; and the co-processor unit is used for receiving sensing information transmitted from the long-distance wireless radio-frequency unit and implementing analysis and processing. The invention further relates to a node main transmitting method based on the long-distance wireless internet of things system and further relates to a node main receiving method based on the long-distance wireless internet of things system. According to the long-distance wireless internet of things system and the node main transmitting and node main receiving methods, by designing the long-distance wireless internet of things system, the far-distance information transmission is implemented between the gateway and the nodes arranged around the gateway, so an arrangement distance between the nodes and the gateway is improved, thereby adapting to an internet of things application which needs a further transmission distance.

The invention discloses an information transmission method, device and system, which relate to the technical field of communications and can solve the problem of transmission conflicts of a pluralityof types of services when resources for transmitting the plurality of types of services overlap. According to the specific scheme, M power control parameters are determined, the M power control parameters are power control parameters of M pieces of uplink information to be sent, each piece of uplink information is uplink control information or uplink data information, M is an integer larger than or equal to 2, sending priorities of the M pieces of uplink information are determined according to the M power control parameters, and under the condition that the sending resources of the M pieces ofuplink information are all overlapped, at least one piece of uplink information in the M pieces of uplink information is sent according to the sending priority. The embodiment of the invention is applied to the process that the UE sends at least one piece of uplink information in the M pieces of uplink information according to the sending priorities of the M pieces of uplink information.

A method for avoiding collision in command transmission includes starting up special I / O port, transmitting command to extension interface module by master system through I / O port, using embedded controller to analyze and execute command received by extension interface module and feeding executed result back to maser system by said embedded controller after command is executed. The electronic device used for realizing said method is also disclosed.

The invention provides an underwater acoustic network reservation multi-access method based on active time reversal, and relates to the technical field of underwater acoustic communication and underwater networks. Multiple access in the data transmission process among nodes, which is applicable to a distributed acoustic network MAC layer, is adopted, so that the transmission conflicts are avoided, the success probability and channel utilization rate of once transmission are substantially improved, and the networking energy consumption is lowered; by means of active TR space-time focusing and the space change characteristic of an underwater acoustic channel, the disadvantages are converted into advantages, the broadcasting characteristics of the underwater acoustic channel is weakened, the signal interference among adjacent links under a distributed multi-hop environment is effectively isolated, and the good transmission concealment and security of the multi-access method are realized by channel broadcasting weakening, so that the space multiplexing is improved, the network throughput is increased, the time delay of the system is shortened, and energy is saved.

The invention relates to a pickup, and discloses a multi-channel audio pickup method and system based on a synchronous Ethernet. The method comprises the following steps: in N time slices of a synchronization period, a switch sends synchronization cells to N paths of audio collection ends in sequence, each time slice sends the synchronization cell corresponding to the audio collection end to one path of audio collection end, and each time slice sends the synchronization cell corresponding to the audio collection end to the other path of audio collection end; the synchronous cell comprises synchronous clock information and a signal-to-noise ratio of an audio signal in audio data which is received in a previous synchronous period and corresponds to the audio collection end; and when each path of audio collection end receives the synchronous cell corresponding to the path, the cached audio data is packaged and sent to a switch, a local clock is calibrated according to the synchronous clock, and voice enhancement processing is performed on a preset frequency band signal in subsequent audio collection according to the signal-to-noise ratio. According to the embodiment of the invention, the problem of synchronous transmission of multiple paths of audio data is solved, the transmission delay is low, and the transmission requirement of high real-time performance of the audio signal is met.

The invention discloses a data scheduling method based on a time-sensitive network. The method comprises the following steps: acquiring current network data in a transmission network based on the time-sensitive network; determining a transmission path used by the current network data; acquiring target network data using the same transmission path as the current network data in the transmission network; judging whether the current network data or the target network data can be scheduled at the current industrial moment or not to obtain a judgment result; and performing data scheduling accordingto the judgment result. Through the technical scheme of the invention, reasonable data scheduling can be performed according to the judgment result of whether the current network data or the target network data can be scheduled or not at the current industrial moment, so that transmission conflicts of different network data on the same transmission path are avoided.

The invention relates to a data block sending method and a device, a storage medium and electronic equipment. The method comprises the steps of determining a to-be-sent target data block; determininga first data block type corresponding to the target data block in data block types, wherein the data block type comprises a fast associated control channel (FACCH) data block or a traffic channel (TCH) data block; determining a transmission state of a data block of a second data block type; wherein the second data block type comprises other data block types except the first data block type in thedata block types; and sending the target data block according to the transmission state.

The invention discloses a method for allocating emergency data time slots of a body area network based on a listening mechanism, which comprises the following steps: determining the basic rules for nodes to send common data and emergency data; The time slot allocation method for nodes to send emergency data; determine the time slot allocation method for multiple nodes to send emergency data. The present invention adopts the listening mechanism, when the node generates urgent data, immediately in the listening period T 0 Send an occupancy signal to send urgent data by occupying the time slot that originally sent ordinary data; when multiple nodes generate urgent data at the same time and generate transmission conflicts, the competition phase is started, and each node uses a competitive method to send urgent data; in the competition phase, the design is based on node Priority back-off strategy, and adjust the change speed of the back-off window according to the network scale, improve the utilization rate of transmission resources and reduce the probability of retransmission conflicts, and ensure the real-time and reliability of emergency data transmission.

The invention provides a link layer control method capable of detecting conflicts. The method comprises the following steps: broadcasting a notification message to a transmission node by using a receiving node, and starting an RSVP (Resource Reservation Protocol) window including a plurality of time slices, wherein the notification message comprises two parameters, namely, n and m; if data packets to be forwarded exists in the transmission node, calculating a time slice sequence number according to the attached parameters n and m after receiving the notification message, and selecting corresponding time slices from the RSVP window; replying an acknowledgement frame to the receiving node; after the RSVP window ends, speculating the time slice sequence number of the received acknowledgement frame according to the receiving time of each acknowledgement frame by using the receiving node; broadcasting a poll frame to the transmission node by using the receiving node, and embedding the speculated time slice sequence number of the acknowledgement frame in the poll frame; transmitting the data packets in sequence in a polling way by using the transmission node. By adopting the link layer control method, transmission conflicts can be avoided effectively.

The embodiment of the present invention discloses an indication method, a coordinator and a user equipment of an uplink channel state, which can avoid the transmission conflict problem of the uplink channel and improve the throughput of the system. The method in the embodiment of the present invention includes: the coordinator determines the state of the uplink channel; the coordinator generates a downlink signal according to the state of the uplink channel; the coordinator sends the downlink signal to the user equipment UE; wherein the downlink signal is a downlink A signal frame or an idle pattern frame, the frame headers of the downlink signal frame and the idle pattern frame both include an uplink channel state indication field, and the uplink channel state indication field is used to indicate the state of the uplink channel; or the downlink signal is an idle pattern sequence, where the idle pattern sequence indicates the state of the uplink channel.

Embodiments of the invention provide a communication method used for a TDD system and an apparatus thereof. The TDD system is configured with a channel of a first mode and a channel of a second mode. The channel of the second mode possesses shorter transmission interval time (TTI) compared to the channel of the first mode. The method comprises the following steps of receiving data from a downlink channel of the second mode; and in at least one special subframe, sending transmission confirmation information aiming at received data through using at least one uplink channel of the second mode. The embodiments of the invention provide a corresponding communication method and a method for coordinating different communication modes in the TDD system. Besides, the embodiments of the invention also provide a corresponding apparatus. In the technical scheme, time delay can be effectively reduced and simultaneously uplink and downlink transmission performance of the TDD system can be increased.