China Academy of Telecommunications Technology

Datang Mobile Communications Equipment Co., Ltd.

Shanghai Ultimate Power Communications Technology Co., Ltd.

China Academy of Telecommunications Equipment Co., Ltd.

Shiqiang Suo

Xueming Pan

Yingmin Wang

Shaohui Sun

Yu Ding

Guojun Xiao

Yongbin Xie

Deshan Miao

Hai Tang

Bo Han

Ruiqi Zhang

Zhuo Gao

Qiubin Gao

Xin Zhang

Li Long Chen

Ke Fei Wang

Xin Su

Qiuping Huang

Guoqing Li

Yanan Lin

Libo Wang

Fei Qin

Shaoli Kang

Ke Wang

Shanzhi Chen

Xianjun Yang

Yongjun Deng

Changguo Sun

Xiaojiao Li

Jianfei Zhang

Hai Bi

Liming Hou

Yuexia Song

Yeming Tang

Wengang Li

Qunying Wu

Qinling Xiong

Jiaojiao Liu

Qiusha Gong

Zukang Sehn

A method for handover of a satellite base station, a terminal, the satellite base station, and a storage medium are provided. The terminal determines a pitch angle when accessing the satellite base station; and if the pitch angle is determined within a preset range, the terminal performs inter-satellite handover; or the terminal sends the pitch angle to the accessed satellite base station, so that the satellite base station notifies the terminal to perform the inter-satellite handover when determining that the pitch angle is within the preset range.

Method for handover of satellite base station, terminal, satellite base station, and storage medium

Provided are a beam management method and apparatus, and a network side device, a terminal and a storage medium. The method includes receiving beam information for beam management sent by a terminal, wherein the beam information comprises uplink beam information or downlink beam information; determining specified information for beam management according to the beam information, wherein the specified information comprises terminal location information and/or beam quality information; and determining transmission beams for signal transmission and/or a trend of transmission beam change according to the specified information and network deployment information, wherein the signal transmission comprises uplink signal transmission or downlink signal transmission. The great overhead and delay problems caused by the frequent beam sweeping process in high-speed occasions can be solved, the beam management strategy can be optimized and beam sweeping time and beam overhead can be saved.

Beam management method and apparatus, and network side device, terminal and storage medium

The present invention discloses a method, system and device for determining a bandwidth of an uplink sounding reference signal SRS. The method for determining the bandwidth of the uplink SRS comprises the following steps: determining whether SRS is transmitted with the uplink pilot time slot if the SRS is transmitted with the largest bandwidth level; transmitting SRS with the non-extensive SRS bandwidth if SRS is determined to be transmitted with the uplink pilot time slot and the UE reaches the power limit. In the present invention, the signal-to-noise ratio detected on the bandwidth with which SRS transmitted can be maintained, and the accurate detection of the channel information is thereby realized.

Method, system and device for determining bandwidth of uplink sounding reference signal

The embodiment of the present invention relates to the technical field of wireless communication, and particularly to a method and a device for resource allocation, which are used to solve the problem existing in the prior art that, when an inter-neighborhood interference coordination method is used to reduce interference, it often results in a low resource utilization rate in neighborhoods or a limitation on the transmission power, which wastes the hardware resources in a base station and increases power consumption. The method in the embodiment of the present invention comprises: at least two frequency sub-bands are determined in a carrier bandwidth, wherein the central frequencies of frequency sub-bands are different, and there is an overlapping area in the frequency domain between at least two frequency sub-bands from all frequency sub-bands; the determined frequency sub-bands are allocated to individual neighborhoods in a deployment area, and the frequency sub-band allocated to a neighborhood is used as the system bandwidth of that neighborhood. By using the method in the embodiment of the present invention, the inter-neighborhood interference in common uplink channels and common downlink channels is decreased effectively, and thus the limitation on transmission power in those neighborhoods is reduced, which increases the available signal transmission power in the neighborhoods to a certain extent and at the same time reduces the hardware costs of the base station and power consumption, without increasing the costs for network deployment.

Method and device for resource allocation

The present invention discloses a transmission method with multi-carrier aggregation, which includes: performing uplink and downlink configurations for each of the component carriers aggregated in a cell and ensuring coexistence of at least one identical uplink sub-frame and at least one identical downlink sub-frame between at least two of the component carriers and compliance of the configuration of at least one of the component carriers with an uplink and downlink configuration of R8; and transmitting the uplink and downlink configuration of any one of the component carriers and those of the other component carriers aggregated with the any one component carrier to an LTE-A UE accessing the corresponding component carrier. The invention further provides a transmission device with multi-carrier aggregation. With the invention, uplink and downlink configurations in an LTE-A system can be performed to accommodate a demand of a TDD system.

Method and device for enabling multi-carriers aggregation transmission

An adaptive modulation and coding method includes selecting punctured Physical Resource Blocks (PRBs) to transmit downlink data for User Equipment (UE); determining Transport Block Size (TBS) and number of punctured PRB pairs for transmission to the UE based on the carried service; scheduling downlink data for the UE based on determined TBS, and transmitting the number of used punctured PRB pairs and a Modulation and Coding Scheme (MCS) sequence number to the UE; and the UE converting number of the punctured PRB pairs to number of normal PRB pairs, determining modulation scheme and TBS sequence number based on the MCS sequence number, and determining TBS of the downlink data based on number of normal PRB pairs and TBS sequence number.

Method, system and device for adaptive modulation and coding

The present invention relates to the field of communications, and provides a communication method using spatial division multiple access (SDMA), to optimize an existing spatial division multiplexing mechanism. The method comprises: for each channel including a service channel and a control channel, according to a service information amount and/or a control information amount of the channel and a decision threshold corresponding to the channel, determining whether to activate SDMA for the channel; according to a decision result for a remote radio unit (RRU) to which each user belongs, allocating resources in an SDMA manner for the channel with the SDMA activated, and sending data of each user on the channel only on the RRU to which the user belongs; for a channel with the SDMA not activated, sending all data on the channel on all RRUs. The present invention is applicable to the spatial division multiplexing of various physical channels and physical signals specified by the standards of LTE and LTE-A systems, and can further improve utilization of resources in the system, the throughput of the system, and the data transmission rate.

Communication method using spatial division multiple access (SDMA), and base station

A method for achieving energy-saving in a mobile communication system base station, for application in an LTE system, comprising: determining the average value of a downlink sub-frame traffic load; determining, when the average value of the downlink sub-frame traffic load is below a threshold value therefore, an MBSFN downlink sub-frame which is not carrying multicast traffic; and closing the radio frequency channel corresponding to the multicast symbol in the MBSFN downlink sub-frame which is not carrying multicast traffic. By using the method, the number of downlink sub-frames required to meet the communication traffic needs of a current cell is judged according to changes in the traffic load observed by measuring the traffic load values in that cell; sub-frames which can be closed are set as MBSFN downlink sub-frames which do not send multicast traffic; radio frequency channels occupied by the multicast symbol are closed, thereby reducing energy consumption.

Method and apparatus for saving energy in mobile communication system base station

The field of wireless communications is related, especially the technique of transmitting uplink sounding reference signal (SRS) by a mobile terminal with multiple transmission antennas is related. A method for receiving uplink sounding reference signal includes the following steps: receiving the SRS signals, which are respectively transmitted from respective radio frequency transmission modules of the mobile terminal according to the respectively allocated Transmission Comb (TC) values and Cyclic Shift (CS) values when the transmission period arrives, wherein TC values and/or CS values allocated for any two radio frequency transmission modules are different; determining the radio frequency transmission module corresponding to every received SRS signal according to the TC values and CS values respectively allocated for respective radio frequency transmission modules. A device for receiving uplink sounding reference signal, a method and a device for transmitting uplink sounding reference signal are also provided. Because different TC values and/or different CS values are allocated for respective radio frequency transmission modules, (multiple) radio frequency transmission modules can transmit SRS signals through (multiple) transmission antennas during the same transmission period by way of Frequency Division Multiplex (FDM) or Code Division Multiplex (CDM).

Method for transmitting and receiving uplink sounding reference signal, base station and mobile terminal

The present invention provides a method for implementing uplink transmission TA. The method includes: receiving, by a UE, a TA command, adding a TA value corresponding to the TA command and a pre-configured TA adjusting offset to obtain a practical uplink transmission timing advance TA'; and transmitting, by the UE, uplink data according to the TA&#x2032;. The present invention also provides another method for implementing uplink transmission TA. Compared with the prior art, in the methods provided by the present invention, a TA adjustment indicating table is respectively configured in the eNodeB and the UE, and some items of the TA adjustment indicating table are commonly-used by a TDD system and an FDD system. The present invention also provides apparatuses for implementing uplink transmission TA. The present invention provides detailed solutions for implementing uplink transmission TA in the TDD system and achieves coherence between the designs of the TDD system and the FDD system to the largest extent.

Method and apparatus for implementing indication of uplink transmission timing advance

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

The present invention discloses a method for processing uplink signal. In this method, when a random access channel of a cell where a user equipment (UE) locates is within an uplink pilot timeslot, the UE determining whether there is a conflict between the random access channel and time-frequency position of an uplink channel quality sounding pilot of the UE; and if there is a conflict, the uplink channel quality sounding pilot will not be transmitted by the UE within the uplink pilot timeslot. The present invention also discloses a system and apparatus for processing uplink signal. By applying the method, system and apparatus of the present invention, the interference to detection performance of the random access channel caused by the uplink channel quality sounding pilot will be avoided, thereby increasing the detection performance of the random access channel.

Method, system and apparatus for processing uplink signals

A method for transmitting an uplink channel sounding pilot is used in the Long Term Evolution Project. The method includes: receiving, by a User Equipment, an uplink channel sounding pilot scheduling signaling; and transmitting, by the User Equipment, an uplink channel sounding pilot according to an indication in the uplink channel sounding pilot scheduling signaling. The uplink channel sounding pilot scheduling signaling includes one of or a combination of indication information including transmission starting time, a transmission period, duration, a subcarrier index, a subframe index, a long block index and a frequency band of the uplink channel sounding pilot. A system for transmitting an uplink channel sounding pilot, a base station and a User Equipment are also disclosed. With the use of the invention, a User Equipment may be dynamically scheduled to transmit an uplink channel sounding pilot, a solution for carrying the uplink channel sounding pilot scheduling signaling is provided, and a solution for determining the position of the uplink channel sounding pilot in the subframe is also be provided, thereby the position of the uplink channel sounding pilot in the subframe can more accurately reflect the conditions of the channel on which uplink and/or downlink processing is performed according to the uplink channel sounding pilot.

Method and system for transmitting an uplink channel sounding pilot and base station and user equipment

The present invention discloses a method for beam forming transmission, comprising the following steps: the eNB mapping the downlink data of the user and the UE-specific reference signals carried in the DwPTS Field for beam forming transmission according to the preset mapping structure, and performing the beam forming process; the eNB performing the resource mapping on results of the beam forming process result, primary synchronization signal, control signaling, Cell specific reference signal and other user data to form the DwPTS Field data; and the eNB sending the DwPTS Field data to the UE. The present invention further discloses a system and a corresponding device for beam forming transmission. The present invention can realize beam forming transmission in the Special Field DwPTS and improve the performance of the system without introducing a new user UE-specific reference signal mapping structure, which is simple to be realized.

Method, system and device for beam shaping transmission

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Beijing, China

Shiqiang Suo