120results about How to "Backward Compatibility Guaranteed" patented technology

The invention provides an uplink data transmission method and a terminal. The method comprises steps: the terminal receives configuration information related to uplink shunt bearing and the information is stored; the terminal counts an effective cache data amount; according to the configuration information and the effective cache data amount, the terminal determines an uplink data transmission mode, wherein the uplink data transmission mode comprises any following one: a mode of transmitting uplink data through main connection, a mode of transmitting uplink data through slave connection, a mode of opening uplink shunt transmission, and a mode of transmitting uplink data through main and slave connection. Flexible shunt transmission configuration for uplink data can be realized, the uplink peak rate can be fully improved in the case of large data amount transmission, excessive resource occupancy can be reduced in the case of small data amount transmission, and an uplink data transmission mechanism and flexible adaptation on large data amount transmission and small data amount transmission can be realized.

A method of sending data in a multiple antenna system includes the steps of generating a transmission signal by applying channel-dependent precoding to a first antenna cluster and a second antenna cluster, each comprising a plurality of antennas, wherein the channel-dependent precoding is performed by a precoding weight matrix in which a precoding weight for each of the antenna clusters has a block diagonal form and the precoding weight is represented by P×V for a number of transmission antennas P, included in each of the antenna clusters, and a number of layers V applied to each of the antenna clusters (P and V are an integer greater than 0) and sending the transmission signal.

The invention discloses a data transmission method for supporting sub-channel modulation coding, which is used in a wireless local area network. The method comprises the following steps of: acquiring sub-channel modulation coding information which contains spatial stream information, sub-channel modulation mode of each spatial stream and coding rate through a first site; packing the sub-channel modulation coding information by adopting a physical layer data unit frame of a predetermined format; and sending a physical layer data unit of a predetermined format to a second site through the first site to demodulate the physical layer data unit frame so as to obtain received data. The invention also provides a corresponding wireless local area network system. As the modulation mode is selected according to the information condition of each sub-channel, the invention improves the data transmission efficiency, supports adaptive modulation coding on the sub-channel consisting of sub-carrier packets, effectively overcomes the frequency selectivity in the system, improves the performance of the system, and is backward compatible with the existing system.

The present invention provides a method for defining, and for transmitting, a new uplink reference signal and devices supporting the method. In one embodiment of the present invention, a method in which a terminal transmits a millimetre wave reference signal (mW-RS) in a millimetre-wave (mmWave)-supporting wireless access system comprises the steps of: receiving a downlink reference signal in a predetermined number of sub-frames, and measuring two or more received power levels; determining whether to transmit an mW-RS, based on the value(s) of the difference(s) between the two or more received power levels; and transmitting the mW-RS if it has been decided to transmit an mW-RS. Here, the mW-RS is transmitted in order to measure whether the state of a wireless channel has transitioned between an LoS (Light of Sight) state and a NLoS (Non-LoS) state.

A method for uplink transmission in an OFDMA system is provided. The subcarrier transmission method includes arranging 4 pilot REs at different positions of a frequency axis in a basic unit when the basic unit includes 4 subcarriers on the frequency axis and 6 OFDM(A) symbols in a time axis, arranging data REs at remaining positions of the basic unit, and transmitting the basic unit to a receiving end.

When a wavelength having the same value as a reference wavelength Al of a first laser light is set to a designed wavelength λ, a diffractive optical element has: an inner circular side irregular diffraction pattern portion, in which a plurality of irregular portions in which a height of a convex portion is set to approximately 1λ-fold of the designed wavelength λ with respect to a concave portion are repeated, being formed in an annular shape in an inner circular area having a predetermined diameter for the correction of a spherical aberration generated due to a difference in substrate thickness between first and second optical recording mediums centering on a central point through which an optical axis runs while gradually changing a pitch of the irregular portions in a radial direction toward the outer circular side; and an outer circular side tiered diffraction pattern portion which is intended to improve a chromatic aberration with respect to the first laser light by forming in an annular shape in an outer circular area outside the inner circular side irregular diffraction pattern portion a plurality of tiers by setting a height of each tier to approximately mλ-fold (where m is a natural number which does not include 0) of the designed wavelength λ or by setting the same while changing a value of m for each tier.

A method for uplink transmission in an OFDMA system is provided. The subcarrier transmission method includes arranging 4 pilot REs at different positions of a frequency axis in a basic unit when the basic unit includes 4 subcarriers on the frequency axis and 6 OFDM(A) symbols in a time axis, arranging data REs at remaining positions of the basic unit, and transmitting the basic unit to a receiving end.

The invention discloses a method for distributing resources dynamically, comprising the following: step S202, a plurality of different resource unit combinations are set according to the number of the resource unit indicating bit, the incidence relation between each resource unit and the resource unit indicating bit under the resource unit combination is set; step S204, one incidence relation between each resource unit and the resource unit indicating bit is selected and is configured to a wireless emitter and a terminal for distributing the dynamic distributing resource to the terminal; step S206, according to the resource unit combination configured to the terminal, the dynamic distributing resource is distributed to the terminal; according to the incidence relation between each resource unit and the resource unit indicating bit, a value of the resource unit indicating bit on a resource distribution and control channel is set and is configured to the terminal; step S208, the terminal obtains the value of the resource unit indicating bit from the resource distribution and control channel; according to the value, the configured resource unit combination and the incidence relation of indicating bits between resource units, the distributing information is obtained.

The invention discloses a data transmission method suitable for two-way transmission of a cable TV network. The method is implemented based on EOC technology, and includes: configuring four bandwidth modes using orthogonal frequency division multiplexing modulation technology; generating The time domain waveform of the preamble symbol, the frame control OFDM symbol and the data OFDM symbol; the time domain waveform of the preamble symbol, the frame control OFDM symbol and the data OFDM symbol will be generated The multiplexing symbols are combined to form a complete LoREOC physical frame; and the LoREOC physical frame is used for data transmission to realize data transmission suitable for two-way transmission of cable television networks. The present invention solves the problem of low resource utilization rate and poor compatibility of current relevant standards for my country's specific frequency spectrum division.

The invention discloses a method and a system for timing a subframe, applied to a communication system adopting a relay node. The method comprises the steps of: timing an uplink return link subframe at a relay node side according to a downlink return link subframe of the relay node side, determining timing quantity by using a time advance command (TAC) sent by a base station; and when the relay node sends an uplink signal to the base station, sending the advanced timing quantity according to the initial time of the downlink return link subframe of the relay node side. According to the technical scheme provided by the invention, the invention can be better suitable for a link between the relay node and the base station and is flexible in a timing mode without increasing the signaling overhead, thereby ensuring the backward compatibility and solving the problem of timing of the relay subframe and an access subframe.

The invention provides a channel multiplexing and mapping method and a channel multiplexing and mapping device, which are applied to the multiplexing and mapping of a relay link-physical hybrid automatic repeat request indicator channel (R-PHICH) and a direct link-physical hybrid automatic repeat request (HARQ) indicator channel (PHICH). The method and the device simply realize the multiplexing and the mapping of the R-PHICH and the PHICH by repeatedly encoding and modulating a single data flow or the multi-data flow feedback information of an uplink service, spreading spectrums of repeatedly encoded and modulated signals according to a preset spectrum spreading factor and mapping corresponding control channel resources in a time direction and a frequency direction after the spectrum spreading. The method and the device meet the requirements of B3G / 4G research targets well and solve the problem of multi-data flow feedback acknowledgement information. Meanwhile, the method has the advantage of ensuring the backward compatibility (compatibility with an LTE system).

The invention provides a method for implementing an uplink synchronization HARQ (Hybrid Automatic Repeat Request) process in a multi-base station cooperative receiving network. In the method, according to a specific embodiment, a service base station provides a receiving response according to a response time limit for an uplink synchronization HARQ process with a smaller response time limit and formally directs a terminal to retransmit or start a new transmission after finishing the combination. According to another embodiment, the uplink synchronization HARQ process has a response time limitmatched with the time delay of the multi-base station receiving network so that the service base station sends a receiving response or a control signaling on a PDCCH (Packet Dedicated Control Channel) after finishing the combination. Thus uplink synchronization HARQ in a multi-base station cooperative receiving environment in LTE (Long Term Evolution) and LTEA (LTE-Advanced) networks can be realized.

The embodiment of the invention provides a method and apparatus for sending a demodulation reference signal, a base station and a terminal. The method comprises the following steps: mapping DMRS sent by a demodulation reference signal DMRS port 7 and a DMRS port 8 to the terminal in a first mapping sequence to obtain a first DMRS; mapping the DMRS sent by a DMRS port 11 and a DMRS port 13 to the terminal in a second mapping sequence to obtain a second DMRS, wherein the first mapping sequence and the second mapping sequence are opposite; and sending the first DMRS and / or the second DMRS to the terminal. By adoption of the method provided by the embodiment of the invention, in the case of multiuser maximum 8-flow transmission, the power of an orthogonal frequency division multiplexing symbol is balanced while backward compatibility is guaranteed.

The invention relates to a method for sending control information to a relay station by a base station. The method comprises the following steps of: sending control information to the relay station within the range covered by the base station by the base station through a physical downlink sharing channel (PDSCH) resource block in a frequency division multiplexing way, while preappointing the attribute information of the occupied block by the base station and the relay station or sending to the relay station by the base station, wherein the attribute information of the occupied block comprises the quantity, position and allocation mode of the resource blocks. The method for transmitting the control information also comprises the following steps of monitoring the control information on the corresponding PDSCH resource block by the relay station according to the preappointed or received attribute information, and executing the corresponding operation according to the monitored control information. The system for transmitting the control information comprises the base station and the relay station within the range covered by the base station, wherein the base station comprises a resource allocating module and an information sending module, and the relay station comprises an information receiving module and an executing module. By adopting the invention, the backward compatibility can be ensured and the frequency diversity gain is obtained.

When a wavelength having the same value as a reference wavelength λ1 of a first laser light is set to a designed wavelength λ, a diffractive optical element has: an inner circular side irregular diffraction pattern portion, in which a plurality of irregular portions in which a height of a convex portion is set to approximately 1λ-fold of the designed wavelength λ with respect to a concave portion are repeated, being formed in an annular shape in an inner circular area having a predetermined diameter for the correction of a spherical aberration generated due to a difference in substrate thickness between first and second optical recording mediums centering on a central point through which an optical axis runs while gradually changing a pitch of the irregular portions in a radial direction toward the outer circular side; and an outer circular side tiered diffraction pattern portion which is intended to improve a chromatic aberration with respect to the first laser light by forming in an annular shape in an outer circular area outside the inner circular side irregular diffraction pattern portion a plurality of tiers by setting a height of each tier to approximately mλ-fold (where m is a natural number which does not include 0) of the designed wavelength λ or by setting the same while changing a value of m for each tier.

First and second phase function curves are respectively obtained based on first and second phase functions with a wavelength having the same value as a reference wavelength λ1 of a first laser light being determined as a designed wavelength λ, a phase shift element then has an inner circular side tiered phase difference pattern portion formed in annular shapes in an inner circular area on one surface thereof based on the first phase function curve and an outer circular side tiered phase difference pattern portion formed in annular shapes in an outer circular area outside the inner circular side tiered phase difference pattern portion based on the second phase function curve. A tier pitch of tiers of the inner circular side tiered phase difference pattern portion is set to a height corresponding to a phase difference of approximately 1λ and, on the other hand, a tier pitch of tiers of the outer circular side tiered phase difference pattern portion is set to a height corresponding to a phase difference of approximately mλ (where m is a natural number which does not include 0) or a height corresponding to a phase difference of approximately mλ by changing a value of m in accordance with each tier.