51results about How to "Promote coexistence" patented technology

A flexible OFDM / OFDMA frame structure technology for communication systems is disclosed. The OFDM frame structure technology comprises a configurable-length frame which contains a variable length subframe structure to effectively utilize OFDM bandwidth. Furthermore, the frame structure facilitates spectrum sharing between multiple communication systems.

Disclosed are systems and methods which provide interference mitigation by making alternative resources available within areas served by wireless communication links. Embodiments provide multiple channel availability in establishing wireless communication links to facilitate interference mitigation. Time domain techniques, spatial processing techniques, and / or frequency domain techniques may be implemented for spectrum management. Embodiments provide wireless base station configurations in which all or a plurality of base station sectors use a same frequency channel and / or in which each sector or a plurality of sectors use all frequency channels. Multi-channel strategies may be implemented such as to provide dynamic selection of a “best” frequency channel, to provide transmission of identical data on multiple channels for combining / selection at the receiver, and / or to provide for dividing the data for transmission on multiple channels.

Disclosed are systems and methods which provide interference mitigation by making alternative resources available within areas served by wireless communication links. Embodiments provide multiple channel availability in establishing wireless communication links to facilitate interference mitigation. Time domain techniques, spatial processing techniques, and / or frequency domain techniques may be implemented for spectrum management. Embodiments provide wireless base station configurations in which all or a plurality of base station sectors use a same frequency channel and / or in which each sector or a plurality of sectors use all frequency channels. Multi-channel strategies may be implemented such as to provide dynamic selection of a “best” frequency channel, to provide transmission of identical data on multiple channels for combining / selection at the receiver, and / or to provide for dividing the data for transmission on multiple channels.

A flexible OFDM / OFDMA frame structure technology for communication systems is disclosed. The OFDM frame structure technology comprises a configurable-length frame which contains a variable length subframe structure to effectively utilize OFDM bandwidth. Furthermore, the frame structure facilitates spectrum sharing between multiple communication systems.

A flexible OFDM / OFDMA frame structure technology for communication systems is disclosed. The OFDM frame structure technology comprises a configurable-length frame which contains a variable length subframe structure to effectively utilize OFDM bandwidth. Furthermore, the frame structure facilitates spectrum sharing between multiple communication systems.

The present invention relates to a method for selecting operating frequency channels having frequency parameters, such as a frequency interval or at least one carrier frequency, for a network communicating data over a shared medium. The network is configured to communicate within a frequency range, and the frequency range is divided into a plurality of frequency channels f1-fn, each frequency channel defines a predetermined frequency parameter. The data to be communicated over the network is divided into sequences FS, each sequence having a plurality of positions SP1-SPm. The method further comprises regularly scanning the frequency range to identify interfering frequencies generated by interfering networks operating within said shared medium, and assigning a frequency channel fk to each position SPi within the sequences FS based on the identified interfering frequencies, whereby the use of interfering frequencies is limited.

A method is provided for reducing interference between FDD and a TDD interfering radio networks. For each of the networks, identifying respective radio entities of a pre-defined type for which the interferences should be reduced; defining a time pattern composed of time slots on each of the interfered FDD and TDD frequency channels, that comprises receive time intervals for radio entities of the pre-defined types that are likely to be interfered; aligning the time patterns so that receive time intervals for the radio entities that are potentially exposed to interferences, overlap each other; defining at least two types of time intervals within the time pattern on each frequency channel, wherein a first type of time intervals enables receiving communications with substantially reduced interference and a second type of time intervals for exchanging communications without mitigating interferences induced by radio entities transmitting during that time intervals. The radio entity that might create interference to the radio entity of the pre-defined type of the other network, is prevented from transmitting communications that might create e substantial interference to the radio entity associated with the other radio network, and communications transmitted to some of radio entities of the pre-defined types that might experience interference are scheduled at intervals of the first type.

A method and apparatus for determining handover (HO) signaling in a communications network. The method of the present invention examines the International Mobile Subscriber Identity (IMSI) of a user equipment (UE) during HO and, based on the examination, determines whether Single Radio Voice Call Continuity (SRVCC) or circuit switched (CS) over Long Term Evolution (LTE) using a Generic Access Network Controller (GANC) should be used in the HO.

The disclosed systems and methods relate to improving the coexistence of Bluetooth devices and devices that use other wireless standards. Aspects of the present invention may enable a higher level of data throughput by reducing the retransmission rate. Aspects of the present invention may minimize design cost by allowing manufactures to use Bluetooth radios from one source and non-Bluetooth radios from another source. Aspects of the present invention may be embodied in a single device or multiple devices that operate in a geographic area.

The invention discloses a Bluetooth remote control optimization method and system, and a set-top box. The Bluetooth remote control optimization method comprises the following steps: detecting whether a Bluetooth remote control device has formed pairing connection with the set-top box at present, and if so, receiving a Bluetooth remote control instruction by a Bluetooth module; then in the case of pairing connection failure of the Bluetooth remote control device and the set-top box, closing the Bluetooth module, opening an infrared Bluetooth remote control module at the same time to receive an infrared Bluetooth remote control instruction, and carrying out Bluetooth pairing remote control in cooperation with an infrared function. The infrared Bluetooth remote control function is switched to in the case of pairing connection failure of the Bluetooth remote control device and the set-top box, the set-top box closes the Bluetooth module in the background at the moment, Bluetooth scanning in the background does not need to carried out by using a large number of time pieces, so that the time of the antenna occupied by the Bluetooth is greatly shortened, the WIFI communication throughput of the set-top box is greatly improved, and the coexistence problem of Bluetooth and WIFI is optimized.

Adaptive cancellation of out-of-band interference between coexisting wireless communication devices. A signal including out-of-band noise may be received by a victim communication device and by an adaptive cancellation device. The adaptive cancellation device may use an adaptive filter to isolate a representation of the out-of-band noise. The adaptive cancellation device may then subtract the noise from the receive path of the victim communication device. The victim device and the adaptive cancellation device need not be located on the same chip as an aggressor device generating the out-of-band noise.

This disclosure relates to performing cellular communication in unlicensed spectrum in a manner that accounts for the possible existence of hidden nodes by opportunistically introducing the use of RTS and CTS messages. A listen-before-talk procedure may be performed to determine whether a wireless medium is available. When the listen-before-talk procedure is complete, an amount of time until a next possible start time for communicating in the cellular communication system according to a timing synchronization scheme for the cellular communication system may be determined. The wireless medium may be occupied until the next possible start time for communicating in the cellular communication system in a manner selected based at least in part on the amount of time until the next possible start time for communicating in the cellular communication system. Cellular communication may be performed on the wireless medium at the next possible start time for communicating in the cellular communication system.

A transmitter for transmitting data as a pulsed ultrawide band signal comprises a serial-to-parallel converter (54) for converting the signal to be transmitted to a parallel sequence, a modulator (64) to convert the parallel sequence to a parallel stream of impulse trains. A delay unit (60) delays the parallel streams of impulse trains by different time intervals within the same pulse repetition period. The delayed pulse streams are combined so that the pulses in the streams occur within the pulse repetition period of a single pulse. An antenna (52) is used to transmit the combined signal. A receiver comprises an antenna (72) for receiving a transmitted pulsed ultrawide band signal having two or more interleaved pulse trains with equal pulse repetition periods, the pulse repetition period being greater than the pulse spacing in the interleaved signal. A matched filter filters the received signal, the filter being matched to the pulse shape of the received signal. A low-pass filter (74) is coupled to the matched filter and an analogue-to-digital converter (76) is coupled thereto. A serial-to-parallel conversion unit (78) is coupled to the converter (76) to sample the digital signal at a rate greater than the pulse repetition frequency of the received signal. A signal processor (80) is coupled to the serial-to-parallel conversion unit (78) to produce an output signal representative of the received data.

Systems and methods are disclosed for improving coexistence among wireless devices. A method may include detecting interference on a first radio access technology (RAT) channel, initiating a discovery protocol to identify a proximate wireless device in response to the detecting, establishing a wireless communication connection with the proximate wireless device, requesting radio configuration information and radio change capability information from the proximate wireless device, receiving the radio configuration information and the radio change capability information, and attempting to mitigate interference based on the radio configuration information and the radio change capability information received from the proximate wireless device.

The present invention relates to a method for selecting operating frequency channels having frequency parameters, such as a frequency interval or at least one carrier frequency, for a network communicating data over a shared medium. The network is configured to communicate within a frequency range, and the frequency range is divided into a plurality of frequency channels f1-fn, each frequency channel defines a predetermined frequency parameter. The data to be communicated over the network is divided into sequences FS, each sequence having a plurality of positions SP1-SPm. The method further comprises regularly scanning the frequency range to identify interfering frequencies generated by interfering networks operating within said shared medium, and assigning a frequency channel fk to each position SPi within the sequences FS based on the identified interfering frequencies, whereby the use of interfering frequencies is limited.

Transmit power control functionality in wireless audio systems may be implemented by way of a Transmit Power Control (TPC) algorithm devised to control power for both source and sinks in a multi sink session, to reduce power consumption. Information may be passed back and forth between the source and sink devices to adjust power based on the shared information. The TPC algorithm may allow power control on both ends of an RF link, and may have multiple sink devices communicating with a source device. Furthermore, the multiple sink devices and the source device may each be operating at different power levels, and adjust their respective power levels as instructed by the TPC algorithm. Power control is therefore implemented on both ends of the link, where multiple sources and sinks may all operate at different power levels, and all individually adjust their respective power levels.

A method for reducing interference between FDD and a TDD interfering radio networks including identifying respective radio entities for which the interferences should be reduced; defining a time pattern comprising time slots on each of the interfered channels, and receive time intervals for radio entities that may be interfered, and aligning the time patterns so that receive time intervals for the radio entities that are potentially exposed to interferences, overlap each other. The radio entity that might create interference to the radio entity of the pre-defined type of the other network, is prevented from transmitting communications that might create e substantial interference to the radio entity associated with the other radio network, and communications transmitted to some radio entities of the pre-defined types that might experience interference, are scheduled at intervals in which communications are received with substantially reduced interference.

The invention discloses a bimodal GSM physical layer system and a realizing method thereof. The method comprises the following steps: a GSM physical layer realizes the deviation of frame timing between two asynchronous GSM and TD-SCDMA systems by controlling a time processing unit in the GSM and a time processing unit in the TD-SCDMA; under the mode mainly based on GSM, GSM controls the TD-SCDMA system to independently arrange the time for processing tasks; under the mode that GSM is dependent, the TD-SCDMA system notifies GSM of the idle time by functions. By adopting the mutual measurement, the time synchronization and the message interaction which are realized between bimodal time-asynchronous systems, the bimodal GSM physical layer system and the realizing method of a bimodal baseband chip provides convenience to the coexistence and independent and normal work of two time-asynchronous systems .Thus, the GSM / TD-SCDMA bimodal mechanism is realized.

A wireless smart utility network (Wi-SUN) device participating in a Wi-SUN network for coexistence with a Wi-Fi HaLow network sharing frequency spectra between the networks is provided. The Wi-SUN device includes a receiver to receive packets of neighbor Wi-SUN devices, a memory configured to store computer executable programs including a hybrid carrier-sense multiple access with collision avoidance (CSMA / CA) control program and Wi-SUN backoff control program, a processor configured to execute the hybrid CSMA / CA control program including instructions that steps of estimating a severity of Wi-Fi Halow interference based on one or combination of the severity metrics, selecting a CSMA / CA mode between predetermined CSMA / CA modes in response to the estimated severity, detecting a channel status based on the hybrid carrier-sense multiple access, wherein if the channel status is not idle, a maximum limited number of times for re-attempting a packet transmission is checked to determine an allowability of re-attempting the packet transmission, and a transmitter to transmit packets according to a determination result of the allowability.

A method and an apparatus for controlling transmit power of a CR device are provided. The method includes acquiring CR environment information regarding a licensed user or an unlicensed user occupying an adjacent channel or an adjacent cell of the CR device; determining a transmit power value of the CR device using the CR environment information; and generating transmit power control information including the transmit power value. The method and apparatus guarantee reliable communication of the CR device and minimize interference with the licensed user.

The embodiments of the invention provide a data frame distribution method and device and a data transmission method and device. The data frame distribution method comprises the steps of: according to time slot lengths, calculated in the previous frame period, of a perception frame, transmission frame and a retreat frame of the current frame period, distributing the perception frame and the transmission frame of the current frame period to an LTE user terminal in the range covered by an LTE system base station; after detecting that the LTE user terminal successfully finish data transmission, distributing the retreat frame of the current frame period to the LTE user terminal, and enabling the LTE user terminal to retreat a channel according to the retreat frame. According to the invention, one retreat frame is added based on the frames of an existing LTE system, the channel occupancy of the LTE system is lowered, and the channel occupancy and the throughput capacity of a WLAN system are improved, so that the WLAN system and the LTE system can well coexist, and the utilization rate of unlicensed frequency bands is simultaneously improved.

The invention is suitable for the field of internet technology improvement, and provides a method for supporting continuous evolution of a packet communication network addressing routing identifier, which comprises the following steps of: S1, unifying coding specifications of all network packets in a network to enable each data packet in the network to have certain unified and fixed fields, the field and the field length of the network packet have expansibility; S2, dividing all network groups in the network into different types and carrying different network routing identifiers by setting network group identifier type fields, and enabling different network identifiers to express pushing, pulling, network caching, network anycast and different communication semantics newly appearing in the future to expand network layer functions; S3, due to the fact that different identification types exist in network evolution, dividing the routers in the network into different areas according to the difference of the supporting capacities of the routers to the identifications, wherein the areas are called identification spaces; and S4, when one identifier space flows into a routing identifier type which cannot be identified by the identifier space, the ingress router trying to translate the identifier of the network packet into an identifier which can be identified by the current identifier space and then performing addressing forwarding. The cost is greatly saved, and the service life of the existing equipment is fully utilized.

A transmitter for transmitting data to a receiver in a wireless local area network communication system, including: a candidate channel determination unit configured to determine a candidate channel list including at least one channel being available for transmission at the transmitter; a transmitting unit for transmitting a request packet including the candidate channel list; and a receiving unit for receiving at least one response packet via at least one selected channel included in the candidate channel list from at least one receiver in response to the request packet, the at least one selected channel being available for reception at the at least one receiver; wherein the transmitting unit is configured to transmit a data packet to the receiver via the at least one selected channel after receiving the response packet.

This disclosure relates to using a wake up signal in conjunction with cellular communication in unlicensed spectrum. A cellular base station may provide a wake up signal on an unlicensed frequency channel after successful completion of a listen-before-talk procedure. The wake up signal may include a preamble configured for coherent detection, and information indicating channel occupancy time for acellular communication by the cellular base station and a cell identifier for the cellular base station. A wireless device may monitor the unlicensed frequency channel for a wake up signal, and may determine whether to monitor the unlicensed frequency channel for control channel signaling based on whether a wake up signal is received, and potentially also based on the contents of the wake up signal if a wake up signal is received.

Described herein are a method and apparatus including calculating an aggregate peak total traffic demand for all overlapping access points in an interference range, comparing the aggregate peak total traffic demand to a threshold, rejecting a requested new quality of service traffic stream responsive to results of the comparison, calculating a peak total traffic demand for each overlapping access point in the interference range if the requested new quality of service traffic stream is admissible responsive to results of the comparison, comparing the peak total traffic demand for each overlapping access point in the interference range, if the requested new quality of service traffic stream is admissible, to the threshold and one of accepting the requested new quality of service traffic stream and rejecting the requested new quality of service traffic stream responsive to results of the second comparison.

Transmit power control functionality in wireless audio systems may be implemented by way of a Transmit Power Control (TPC) algorithm devised to control power for both source and sinks in a multi sink session, to reduce power consumption. Information may be passed back and forth between the source and sink devices to adjust power based on the shared information. The TPC algorithm may allow power control on both ends of an RF link, and may have multiple sink devices communicating with a source device. Furthermore, the multiple sink devices and the source device may each be operating at different power levels, and adjust their respective power levels as instructed by the TPC algorithm. Power control is therefore implemented on both ends of the link, where multiple sources and sinks may all operate at different power levels, and all individually adjust their respective power levels.

A wireless smart utility networks (Wi-SUN) device participating in a Wi-SUN network for coexistence with a Wi-Fi HaLow network sharing frequency spectra between the networks is disclosed. The Wi-SUN device includes a receiver to receive packets of neighbor Wi-SUN devices, a memory configured to store computer executable programs including a Hybrid carrier-sense multiple access (CSMA) control program and Wi-SUN Backoff control Program, a processor configured to execute the Hybrid CSMA control program, including instructions that cause the processor to perform steps of estimating a severity of Wi-Fi Halow interference based on a severity detection method, switching a backoff mode between predetermined backoff modes in response to the estimated severity, and performing a backoff procedure according to the selected backoff mode, and a transmitter to transmit packets.

The invention relates to the field of wastewater treatment, and relates to a biological degradation method of nitrogen-containing heterocyclic compound wastewater. An oxidation state compound is added in the nitrogen containing heterocyclic compound wastewater, an anaerobic environment is formed by micro aeration, and mixed electron acceptors of dissolved oxygen and the oxidation state compound simultaneously exist in the system; an upflow biological aerated filter is used as a main reaction device, an optimal degradation effect of nitrogen-containing heterocyclic compounds is achieved according to different components and concentrations of the nitrogen-containing heterocyclic compounds, the pH is controlled to 7.0-7.5, the concentration of the dissolved oxygen is controlled to 0.05-0.3 mg / L (water discharged from the upper part of the filter), and the range of the oxidation-reduction potential is controlled to 150-50 mv; under an anaerobic aeration condition, with the nitrogen-containing heterocyclic compounds as electron donors and oxygen and oxygen-containing compounds as electron acceptors, under the combined effects of micro aerobic bacteria, facultative anaerobic bacteria, aerobic / anoxic denitrifying bacteria and the like, the nitrogen-containing heterocyclic compounds are completely degraded into carbon dioxide and water.

Described herein are a method and apparatus including calculating an aggregate peak total traffic demand for all overlapping access points in an interference range, comparing the aggregate peak total traffic demand to a threshold, rejecting a requested new quality of service traffic stream responsive to results of the comparison, calculating a peak total traffic demand for each overlapping access point in the interference range if the requested new quality of service traffic stream is admissible responsive to results of the comparison, comparing the peak total traffic demand for each overlapping access point in the interference range, if the requested new quality of service traffic stream is admissible, to the threshold and one of accepting the requested new quality of service traffic stream and rejecting the requested new quality of service traffic stream responsive to results of the second comparison.

An intermediate queuing / de-queuing mechanism between an asynchronous server and a synchronous process or client allows the asynchronous server to communicate with the synchronous client in a performance oriented and asynchronous manner. The coexistence of two different queuing mechanisms within the same logical execution environment is thus enabled. Further, the asynchronous merging of other format updates during the recovery process is facilitated, such as change accumulation and image copy records. Operations between the synchronous process and asynchronous processes are thus expedited, embedding a synchronous process within the total asynchronous environment of the overall data processing system to enable restoration of the database.