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108results about How to "Achieve coexistence" patented technology

Apparatus for and method of coordinating transmission and reception opportunities in a communications device incorporating multiple radios

A novel and useful apparatus for and method of coordinating the allocation of transmission and reception availability and/or unavailability periods for use in a communications device incorporating collocated multiple radios. The mechanism provide both centralized and distributed coordination to enable the coordination (e.g., to achieve coexistence) of multiple radio access communication devices (RACDs) collocated in a single device such as a mobile station. A distributed activity coordinator modifies the activity pattern of multiple RACDs. The activity pattern comprises a set of radio access specific modes of operation, (e.g., IEEE 802.16 Normal, Sleep, Scan or Idle modes, 3GPP GSM/EDGE operation mode (PTM, IDLE, Connected, DTM modes), etc.) and a compatible set of wake-up events, such as reception and transmission availability periods. To prevent interference and possible loss of data, a radio access is prevented from transmitting or receiving data packets while another radio access is transmitting or receiving. In the event two or more RATs desire to be active at the same time, the mechanism negotiates an availability pattern between the MS and a corresponding BS to achieve coordination between the RATs.
Owner:COMSYS COMM & SIGNAL PROC

Method, device and system for synchronizing cached data heat value, and distributed caching method

The invention provides a method, device and system for synchronizing a cached data heat value, and a distributed caching method, wherein the synchronizing method comprises the following steps that: a first base station receives a request of user equipment to access a packet domain service; in response to the request for the packet domain service, the first base station sends the packet domain service to the user equipment if determining that the packet domain service is locally cached, and the current heat value of the packet domain service is added to the local caching content list of the first base station based on a preset function; and when the current heat value of the packet domain service is accumulated to a preset threshold, the first base station sends the current heat value of the packet domain service to a heat information synchronizing node in a wireless access network for synchronization, and resets the current heat value locally cached by the first base station. The method provided by the invention solves the technical problem of incapability of realizing within-network cached data sharing in the prior art, and can also avoid the technical problem of the transmission bandwidth of an IUB interface.
Owner:SHANGHAI HUAWEI TECH CO LTD

Distribution caching method and device of cached data

The invention provides a distribution caching method and device of wireless access network cached data. Caches for storing hot contents are allocated in a plurality of base stations in a distributed mode. The distribution caching method includes the steps that the first base station receives a request of a user device for accessing a packet domain service; if the packet domain service is cached in the first base station, the first base station sends the packet domain service to the user device; if the packet domain service is not cached in the first base station, the first base station obtains position information of the cached packet domain service from a cached content list or signed content list or preheated content list maintained by heat information synchronization nodes; the first base station obtains the packet domain service from the second base station or a service provider corresponding to the position information, and the obtained packet domain service is sent to the user device through the first base station. According to the distribution caching method and device, the technical problem that inter-network cached data sharing cannot be achieved in the prior art is solved, and the transmission bandwidth of an IUB can be saved.
Owner:SHANGHAI HUAWEI TECH CO LTD

Signal transmission method, system and device for system joint networking

The invention discloses a method, a system and equipment for transmitting signals during joint networking of systems, which relate to the field of wireless communication and are used for reducing the degree of mutual interference among system signals during the joint networking of the systems. In the invention, a base station is used for determining a first wireless frame structure used in a timedivision-synchronization code division multiple access (TD-SCDMA) system, a second wireless frame structure which is used in a time division-long term evolution (TD-LTE) system and a first frame header offset; the first frame header offset is a difference value between the start time of a first wireless frame and the start time of a second wireless frame when a switch time point from an uplink toa downlink in the first wireless frame with the first wireless frame structure is aligned with a switch time point from an uplink to a downlink in the second wireless frame with the second wireless frame structure; and according to the first frame header offset, the signals of the TD-SCDMA system are received and transmitted by using the first wireless frame, and the signals of the TD-LTE system are received and transmitted by using the second wireless frame. By the method, the system and the equipment, the degree of the mutual interference among the signals of the two systems can be effectively reduced.
Owner:DATANG MOBILE COMM EQUIP CO LTD

System fusing broadband wireless communication and TV broadcasting service

The invention relates to a system fusing broadband wireless communication and TV broadcasting service, belonging to the wireless multimedia communication and TV broadcasting technical field. The invention is characterized in that the system comprises a plurality of multimedia programming sources, at least one multimedia coding unit, at least one relay link, at least one wireless access point AP, at least one broadcasting point BP and at least one controller; wherein, the controller comprises a time-frequency division multiplexing allocating and dispatching unit, a communication control unit, a broadcasting unit, a calculating unit and storage cell. The time-frequency division multiplexing allocating and dispatching unit divides channels in two-dimensional space composed of time and frequency, generates allocation pattern and dispatching signal to respectively dispatch the communication control unit and the broadcasting unit, thus respectively realizing mobile communication or communication on demand function and initiative broadcasting or broadcasting on demand function, the wireless access point also initiatively monitors the receiving status of broadcast packet, the calculating unit calculates packet loss rate and feedbacks the packet loss rate to the broadcasting point, and meanwhile information having public characteristic for massive users is supplied to the broadcasting point to realize broadcasting on demand.
Owner:TSINGHUA UNIV

Method and system capable of filtering adjacent frequency range interference

The invention discloses a method and a system capable of filtering adjacent spectrum interference. The method comprises a radio frequency (RF) micro-electromechanical system (MEMS) switch control module receives a first sending coupling signal from a first frequency range radio frequency module and a second receiving coupling signal from a second frequency range radio frequency module. The RF MEMS switch control module judges whether interference exists between a first frequency range and a second frequency range according to the first sending coupling signal and the second receiving coupling signal, under the condition of a negative result of the judgment, the RF MEMS switch control module can filter the interference by means of changing a first antenna structure by indicating a first frequency range RF MEMS radio frequency reconfigurable antenna working in the first frequency range and/ or changing a second antenna structure by indicating a second frequency range RF MEMS radio frequency reconfigurable antenna working in the first frequency range. By the method and the system capable of filtering adjacent spectrum interference, the adjacent frequency range is achieved to be capable of existing on hardware and the effect caused by an interacting phenomenon is effectively avoided.
Owner:ZTE CORP

Convergence type metropolitan area wavelength division access network system and accessing method

The invention discloses a convergence type metropolitan area wavelength division access network system and an accessing method, and relates to the field of metropolitan area access. The system comprises an OLT located in a central apparatus room, m ROADM nodes and n far-end OTUs, wherein m and n belong to positive integers, m is larger than or equal to 1, and n is larger than or equal to m. The central apparatus room is a network convergence point, the OLT of the central apparatus room and the m ROADM nodes are sequentially connected through optical fibers to form an annular topological structure, the connecting direction of the m ROADM nodes in an annular topology is expressed in the eastward direction and the westward direction, on the basis of the clockwise direction, the eastward direction of a prior ROADM node is connected with the westward direction of a next ROADM node, only one optical fiber exists between every two adjacent ROADM nodes, and each ROADM node is connected with at least one far-end OTU. All services of a service provider can be accessed through one network, the robustness requirements such as mobile backhaul and a special line for a big customer are met, management is convenient, cost is low, bandwidth is allocated flexibly, capacity is large, and the accessing distance is long.
Owner:WUHAN POST & TELECOMM RES INST CO LTD

Fixed mobile convergence wavelength division access ring and access method

The invention discloses a fixed mobile convergence wavelength division access ring and an access method and relates to the metro area access field. The access ring takes CO OLT as a network convergent point to form annular topology, the ring internally comprises a main fiber and a standby fiber, each area business is accessed to OADM through R-OTU; under the main state, in a downlink direction, a signal sent by the CO OLT to the OADM realizes clockwise transmission in the main fiber; in an uplink direction, a signal sent by the OADM to the CO OLT realizes anticlockwise transmission in the standby fiber; in a standby state, after a node next to a fault point switches a signal to the standby fiber, a signal sent by the CO OLT to the OADM realizes anticlockwise transmission in the standby fiber, and a signal sent by the OADM to the CO OLT realizes clockwise transmission in the standby fiber. The fixed mobile convergence wavelength division access ring can satisfy low cost requirements of fixed access, mobile backhaul and robustness requirements of a great customer hotline, is convenient for network establishment and operation and maintenance, is consistent with trends of large bandwidth access and network flatness, is flexible in bandwidth distribution and is easy to upgrade.
Owner:WUHAN POST & TELECOMM RES INST CO LTD

Combined treatment method of 1,4-butanediol production wastewater

The invention relates to a combined treatment method of 1,4-butanediol production wastewater, which comprises the following steps: carrying out physical and chemical pretreatment on wastewater firstly so as to obtain pre-optimized wastewater; improving the biodegradability of the wastewater and further reducing the COD (chemical oxygen demand) concentration of the wastewater through an upflow anaerobic reactor and an aerobic combined biochemical reaction tank; and after the muddy water separation of the wastewater is realized through a secondary sedimentation tank, sequentially feeding the wastewater into a coagu-flocculation reaction settling pond and a biological filter, carrying out deep treatment on the wastewater, removing substances such as tiny suspended solids and colloids and the like in the wastewater through coagu-flocculation reaction and precipitation, and enabling discharged water to meet the requirements of one-class A standards in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB18918-2002) through the synergistic effect of adsorption and biodegradation of the biological filter. The method disclosed by the invention not only has a stable removal effect on COD in 1,4-butanediol production wastewater, but also can effectively resist violent water impacts; and the method has the characteristics of rapid system startup and the like. The method disclosed by the invention also can be applied to the treatment of other high-concentration toxic degradation-resistant organic wastewater with a water quality similar to that of 1,4-butanediol production wastewater.
Owner:TONGJI UNIV +1

Mobile terminal peripherals coexisting apparatus

ActiveCN101430671AAchieve coexistenceSolve the problem that the first interrupt request is lostElectric digital data processingOutput deviceEmbedded system
The invention is applicable to the communication technical field, and provides a coexisting device of mobile terminal peripheral equipment. The device comprises a central processing unit,, the mobile terminal peripheral equipment comprises a safety data (SD) card and a safety data input/output (SDIO) device, and further comprises a change-over switch which is connected with the mobile terminal peripheral equipment and the central processing unit and is used for controlling establishment of connection communication between the central processing unit and the mobile terminal peripheral equipment according to the type of an interrupt request; and a second interrupt request sender which is connected with the central processing unit and the safety data input/output device and is used for sending a second interrupt request to the central processing unit when the first interrupt request is lost. In the coexisting device, the change-over switch controls the connection communication between the central processing unit and the mobile terminal peripheral equipment according to the interrupt request, and sends the second interrupt request by the second interrupt request sender when the first interrupt request is lost, thus solving the loss problem of the first interrupt request of the SDIO device, and realizing the coexistence of the SD card and the peripheral equipment such as the SDIO device.
Owner:YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD

Biological treatment method used for realizing simultaneous removing of carbon and nitrogen in sewage via controlling dissolved oxygen

The invention discloses a biological treatment method used for realizing simultaneous removing of carbon and nitrogen in sewage via controlling dissolved oxygen. The biological treatment method comprises following steps: S1, sewage is delivered into a sewage treatment system provided with only one biological treatment tank, and the biological treatment tank is inoculated with domesticated active sludge, wherein after inoculation, the concentration of active sludge in the biological treatment tank is controlled to be 0.5 to 100g / L; S2, the concentration of dissolved oxygen in the sewage treatment system is controlled, and staged operation is carried out; S3, the total nitrogen, the total carbon, and the concentrations of negative and positive ions of inlet water and outlet water are detected; and S4, in seven days of continuous operation, the concentration of dissolved oxygen is maintained to be 0.1mg / L<=DO<1.0mg / L, TN removing ratio of the sewage treatment system on TOC of sewage of different carbon nitrogen ratio is measured. According to the biological treatment method, carbon nitrogen removing is completed in a same sewage treatment tank, the bacteria colony structure of anaerobic bacteria is controlled via controlling dissolved oxygen, ammoxidation is realized at first, and simultaneous removing of carbon and nitrogen in sewage is realized by denitrifying bacteria.
Owner:SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP +1

Radio time resource allocation method and radio time resource allocation device

The invention provides a radio time resource allocation method and a radio time resource allocation device which are applied to a digital multimedia wireless radio transmission system which is provided with multiple radios and multiple carrier frequencies shared by the multiple radios. The method comprises the following steps: determining the radio priority of each radio in time resource allocation according to preset radio priority determining rules, and determining the carrier frequency priority of each carrier frequency according to preset carrier frequency priority determining rules; determining the carrier frequencies occupied by each radio according to the number of carrier frequencies required for each radio, the radio priority and the carrier frequency priority; and sequentially determining time resource allocation of each radio on the carrier frequencies occupied by the radio according to the order of radio priority, the total time resource request of each radio and the carrier frequencies occupied by each radio. The invention mainly provides a flexible allocation result based on different requirements of a variety of radios in aspects such as capacity, number of carrier frequencies transmitted and the minimum frame length, in order to realize coexistence of a variety of wireless radio systems and effective transmission.
Owner:SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI

A design method of a turbofan ramjet combined engine with an external culvert and a built-in rocket

A design method of a turbofan ramjet combined engine with an external culvert and a built-in rocket belongs to the field of combined engines, and comprises the following steps: firstly, formulating overall performance requirements of the engine, designing a basic flow field of an air inlet channel, and then carrying out streamline tracking to obtain a three-dimensional internal rotation air inletchannel; Inlet and outlet parameters of the scramjet combustion chamber are obtained according to the overall performance of the engine, and the scramjet combustion chamber is designed at an outlet ofthe three-dimensional internal rotation air inlet channel; Designing an exhaust nozzle with an adjustable geometric area at an outlet of the scramjet chamber on the basis of parameters of the scramjet chamber and the thrust requirement of the engine at the Ma4.5-6 + stage; Selecting a turbofan engine on the basis of engine performance requirements at stages Ma0-2, and arranging turbofans at openings in the upper wall surfaces of the three-dimensional inward rotating air inlet channels; A sub-combustion combination channel and a turbofan engine; A rocket engine is arranged in an outer culvertchannel of the turbofan engine; based on the thrust requirement of an engine in the Ma0-5 state, and in combination with the performance parameters of a turbofan engine in the Ma0-2 state and a rocketengine in the Ma2-3 state, a sub-combustion chamber capable of switching working modes is designed behind the turbofan engine.
Owner:XIAMEN UNIV
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