China Academy of Telecommunications Technology

Datang Mobile Communications Equipment Co., Ltd.

Shanghai Ultimate Power Communications Technology Co., Ltd.

Datang Mobile Communications Co., Ltd

Yingmin Wang

Shaohui Sun

Shiqiang Suo

Guiliang Yang

Yongbin Xie

Shaoli Kang

Hai Tang

Changguo Sun

Xueming Pan

Deshan Miao

Shiyan Ren

Yuemin Cai

Yu Ding

Nan Zhong

Hai Bi

Yang Yu

Yi Yang

Jinling Hu

Fang-Chen Cheng

Ke Fei Wang

Rui Zhao

Ning Liu

Libo Wang

Guojun Xiao

Ke Wang

Bo Han

Tiezhu Xu

Jinbo Zhao

Chenxin Li

Lei Mao

Xiaolong Ran

Guanghui Zhang

Jianxun Sun

Yuanxin Qiao

Liming Hou

Hongyan Xu

Yeming Tang

Lubang Cheng

Jiajun Yang

Na Wu

Yongjun Deng

Qinling Xiong

Junyun Yang

Yunzhe Hou

Wengang Li

This disclosure provides a satellite beam offset processing method, a device and a medium. The method includes: a network side device indicating a satellite beam offset parameter to a terminal via a broadcast message and/or a dedicated signalling; the terminal receiving the satellite beam offset parameter indicated by the network side device via the broadcast message and/or the dedicated signalling; and the terminal adjusting a communication process of the terminal according to the satellite beam offset parameter.

Satellite beam offset processing method, device and medium

Disclosed in the embodiments of the present application are a network access method and apparatus for a terminal, an electronic device and a storage medium. The method includes a terminal determining a beam sweeping interval and a sweeping frequency point, and receiving a base station signal sent or forwarded by a satellite; determining the downlink signal quality of the base station according to the base station signal; and if it is determined, according to the downlink signal quality, that the terminal can successfully find a satellite, executing a network access process of the terminal. In the embodiments of the present application, the downlink signal quality of a base station is determined by means of a base station signal sent or forwarded by a satellite; and it is further determined, according to the downlink signal quality, whether a terminal can successfully find a satellite.

Network access method and apparatus for terminal, electronic device and storage medium

A control method and a control device in a heterogeneous three-dimensional hierarchical network, and a communication system are provided. The control method includes: obtaining a coverage mode of a terminal; when the coverage mode is single-layered sub-network coverage, setting a non-ground mobile communication sub-network or a ground mobile communication sub-network corresponding to the single-layered sub-network coverage to be in a standalone operating mode or an intra-layer carrier aggregation mode; and when the coverage mode is multi-layered sub-network coverage, setting the non-ground mobile communication sub-network corresponding to the multi-layered sub-network coverage, or the ground mobile communication sub-network and the non-ground mobile communication sub-network corresponding to the multi-layered sub-network coverage, to be in a cross-layer carrier aggregation mode. The ground mobile communication sub-network and the non-ground mobile communication sub-network use a same or unified radio access technology.

Control method and control device in heterogeneous three-dimensional hierarchical network, and communication system

Methods for selecting and configuring a random access channel, an access device and a network device are provided. The method includes: obtaining parameter information and time-frequency resource allocation information corresponding to at least two types of random access channels, the parameter information including a subcarrier spacing and a preamble sequence, a random access channel bandwidth obtained in accordance with the subcarrier spacing and a length of the preamble sequence being smaller than or equal to a maximum transmission bandwidth of a satellite access device, the subcarrier spacing including a reference value of a maximum frequency offset to be resisted by a satellite system; selecting target parameter information from the parameter information in accordance with a capability and an operating scenario of the access device and a frequency offset proportion of each random access channel; and selecting a random access channel in accordance with the target parameter information, and transmitting a random access signal in accordance with the time-frequency resource allocation information.

Methods for selecting and configuring random access channel, access device and network device

A method and a device for determining sending parameters of a terminal are disclosed. The method includes: determining a pre-estimated signal-to-noise ratio of an uplink on at least one reference position in a cell range corresponding to a satellite beam, determining, according to the pre-estimated signal-to-noise ratio of the uplink, effective isotropic radiated power (EIRP) values corresponding to a preset carrier bandwidth of the uplink, determining, according to the EIRP values corresponding to the preset carrier bandwidth of the uplink, a maximum rate supported by the preset carrier bandwidth of the uplink, determining, according to the maximum rate supported by the preset carrier bandwidth of the uplink, a maximum uplink rate supported by the terminal, and determining an uplink sending maximum EIRP value and/or an uplink sending maximum bandwidth of the terminal according to an uplink rate to be supported by the terminal input by a user.

Method and device for determining sending parameters of terminal

The present application discloses a resource selection method, a data transmission method and a device, relating to the field of communication technology. In the embodiment of the present application, in a case where it is determined that the resource multiplexing mode of the first link and the second link is frequency division multiplexing, by judging whether the selected link is allowed to select a resource that overlaps with the selected resource on another link in the time domain, it may further determine whether to select a resource that does not overlap with the selected resource on another link in the time domain to transmit a service packet to be sent, such that it can also be adjusted according to actual needs based on the pre-configuration, thereby greatly increasing the flexibility of resource selection and the efficiency of spectrum use.

Resource selection method, data transmission method and device

A communication method and a communication device are provided. The method includes: establishing a scenario and determining a task of the scenario, where a plurality of communication systems exist in the scenario, and the task is completed via at least one communication service; selecting at least one communication system for the task from the plurality of communication systems; and controlling the at least one communication system to transmit the communication service required by the task.

Communication method and device

A method for transmitting broadcast service data in a single frequency network including a Radio Network Controller and one or more base stations each with a cell including one or more sectors, the method includes: transmitting, by the Radio Network Controller, broadcast service data and a first transmission time to the base station; and transmitting, by the base station, the broadcast service data to each of its sector after the first transmission time, where the broadcast service data is transmitted to adjacent sectors sharing a common station address at different transmission times. Also, the present invention discloses a system and base station for transmitting broadcast service data in a single frequency network. With this technical solution, the phenomenon of fast fading of received signals in the prior art which occurs at adjacent edge zones of adjacent sectors in the same cell of the single frequency network can be avoided, and thus improving performance of receiving the signals.

Method, system and base station for transmitting broadcast service data in a single frequency network

The present invention discloses a method and an apparatus for downlink beam forming in a TD-CDMA system. The method includes: acquiring the spatial covariance matrixes of all uplink slot interference user signals and the downlink slots in which the interference user signals locate; obtaining the interference spatial covariance matrixes of each downlink slot based on the downlink slots in which the interference user signals locate and the spatial covariance matrixes of the interference user signals; determining the beam forming weight coefficient of downlink expected user signals based on the interference spatial covariance matrixes of each downlink slot and the spatial covariance matrixes of the downlink expected user signals; implementing beam forming based on the beam forming weight coefficient of downlink expected user signals.

Method and apparatus for downlink beam forming in TD-CDMA system

The present invention discloses a control channel allocation method, a packet data transmission method and a RNC of a multi-carrier HSDPA (high speed downlink packet access) technology, wherein the allocation method includes: when a UE accesses a network, the network allocating K pairs of uplink and downlink control channels to be monitored by the UE; during a HSDPA service transmission process, the network selecting N pairs from the K pairs of uplink and downlink control channels to transmit control messages, wherein the selected downlink channels are the corresponding uplink channels are on a same carrier; and the network allocating a pair of uplink and downlink associate channels on each carrier where the selected N pairs of uplink and downlink control channels locate, wherein M&#x2267;N&#x2267;1 and M is a number of carriers used by the network to transmit packet data. The present invention effectively solves the problem that in the traditional single carrier HSDPA, only the transmission control of the single carrier is taken into account and the control requirement in the multi-carrier HSDPA cannot be satisfied.

Method for allocating control channels, method for transmitting packet data and RNC for multi-carrier HSDPA

A transmission method in a Long Term Evolution time division duplex system can carry out reconfiguration for half-frame structures. According to the coverage range requirements of the system, it performs flexible configuration of the number of special time slot areas and the downlink pilot time slots, guard intervals or uplink pilot time slots included therein, and so can support different coverage ranges. A base station and user terminal using above method in the Long Term Evolution time division duplex system.

Transmission method and device in long term evolution time division duplex system

Method for signal generation in broadband wireless communications, comprises: A. modulating, segmenting and serial-parallel converting the signal data to be transmitted, then computing DFT of the serial-parallel converted data so as to transfer them to frequency domain; B. performing block unit modulating processing and block repeat modulating processing on the frequency domain data, then mapping the block units to assigned time-frequency positions; C. computing IFFT of the mapped block units, then adding them to the cycle prefix, thus the random sequences in time domain are generated. Apparatus for signal generation, Method and system for message transmission in broadband wireless communications are also disclosed. The problem of resource allocation and scheduling, and problem of interference coordination and control are solved, the throughput and performance of communication system are greatly improved.

Method, system and apparatus for signal generation and message transmission in broadband wireless communications

A method for determining a data transmission offset includes: synchronizing a first time division duplex TDD system with a second TDD system (a); determining a transmission timing advance of a user terminal according to a deviation between random access time and desired time of the user equipment during establishing the uplink synchronization of the second TDD system (a); determining an offset of a time slot of the second TDD system according to a time difference between the time slots of the first TDD system and the second TDD system (a); and obtaining a data transmission offset of the time slot by adding the determined offset of the time slot to the determined transmission timing advance (a). A system and a base station for determining a data transmission offset are provided.

Method, system and base station for determining data transmission offsets

A data transmission method and central controller for a distributed antenna system and a distributed antenna system. The system includes a central controller and multiple wireless transceiver units. The method includes that wireless transceiver units measure the power of the pilot reference signals received from user terminals and forward this power rate to a central controller; the central controller selects a set of wireless transceiver units for transmitting data to the terminal according to the pilot reference signal power rates of the terminals forwarded by the multiple wireless transceiver units; the central controller performs data processing according to said set of wireless transceiver units; the central controller distributes the processed data to the wireless transceiver units in said set of wireless transceiver units, and the wireless transceiver units in said set perform the downlink data transmission.

Distributed antenna system and its data transmission method and central controller

A method for determining the radio frame structure of a Time Division Duplex system is disclosed, which comprises: configuring, by the network side, the radio frame structure used for service transmission as containing two half-frames each of 5 ms, wherein each half-frame consists of eight service time slots of 0.5 ms and one special time slot field of 1 ms, two consecutive service time slots form a subframe of which the length is 1 ms, and the special time slot field contains a DwPTS, a GP and an UpPTS; determining the lengths of the DwPTS, the GP and the UpPTS in the special time slot field according to the requirements of the coverage range, and determining the radio frame structure used for service transmission. By reconfiguring the radio frame structure, the invention can flexibly support different coverage ranges, enhance the flexibility of satisfying different service requirements, and implement the coexistence of two types of TDD systems.

Method and an apparatus for determining the radio frame structure of time division duplex system

Growing community of inventors

Beijing, China

Yingmin Wang