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.

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 method for obtaining up time advance in carrier aggregation. A plurality of up CC are divided into a plurality of groups by eNB; the quantity of up CC in each group is at least one; grouping information and marks of groups of all the up CC are informed to UE; eNB configures different TA values for all the groups; each group of UE respectively obtains TA value corresponding to the group through a random access process; and each up CC group in the group takes the TA value corresponding to the group as a TA value corresponding to each up CC group. The method can ensure that one UE obtains a plurality of TA values.

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.

Disclosed are a method and a device for CSI-RS port configuration and CSI-RS transmission. The method for port configuration comprises: dividing the CSI-RSs of a number X of ports in a 3D-MIMO system into X / 8 sets of CSI-RSs, with the CSI-RSs of eight ports being a set, and the CSI-RS pattern of each CSI-RS set being compatible with a specific eight-port CSI-RS pattern, wherein X＝8*n, and n is an integer greater than or equal to 2; using FDMA and / or TDMA for distributing resources among the different CSI-RS sets. In the embodiment of the present application, by means of applying necessary enhancements and expansion to present CSI-RS pattern design, CSI-RSs of more logical ports in the 3D-MIMO system are supported. Furthermore, by means of introducing new indication signaling for supporting detection of 3D-MIMO multi-port CSI-RS configurations in user equipment, the backward compatibility of network side CSI-RS configuration and CSI-RS detection by user equipment is maintained to the greatest degree.

Discloses are a method and device for monitoring a control channel in a wireless communication system. A user equipment receives a CFI (control format indicator), indicating a size of a control region within a subframe, via a first downlink control channel and confirms whether or not an extended control region is present in the subframe. If the extended control region is present in the subframe, the user equipment monitors a PDCCH (physical downlink control channel) within the control region and the extended control region.

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.

The invention provides a sync signal mapping method and a sync signal mapping device for a relay link. In the invention, a synchronizing sequence is generated, the mapping positions of sync signal in a frequency direction and a time direction are determined, and thus a specific sync signal mapping manner of a back haul link from a base station to a relay node is realized. The sync signal mapping method and device are well applied to the back haul link from the base station to the relay node, and the sync signal mapping manner is simple; therefore, backward compatibility (compatible with an LTE system) is ensured, and the problem that the relay node cannot correctly receive the primary sync signal (PSS) and the supplementary sync signal (SSS) transmitted from the base station is solved. In the method, a low cost is adopted and a normal completion of tracking by the relay node is ensured.

The invention relates to a method for transmitting control information, a method and device for receiving control information. The method for transmitting control information comprises the steps of: scrambling cyclic redundancy check (CRC) bits of different carriers by adopting different kinds of scrambling information, wherein the cyclic redundancy check bits of different carriers are obtained through carrying out cyclic redundancy check on control information of the different carriers; and sending the control information and the scrambled cyclic redundancy check bits. The CRC bits of the different carriers are scrambled by different kinds of scrambling information to ensure that the scrambling information corresponds to the carriers one by one, thus the different carriers of the same device are distinguished to ensure that UE (User Equipment) side can obtain the control information of different carriers of the device through a PDCCH (Packet Dedicated Control Channel), so that a plurality of downlink or uplink carriers are controlled by one downlink carrier PDCCH, and the backward compatibility is maximally maintained without remarkably increasing the processing complexity of the UE.

The invention discloses a method and system for selectively switching return link subframe configurations in a time division duplex (TDD) system. The method comprises the following steps: a network side selects and determines the target return link subframe configuration according to the influence factors of the target return link subframe configuration and notifies a relay node (RN) of the target return link subframe configuration; and the RN switches the original return link subframe configuration which is being used at present to the target return link subframe configuration according to the target return link subframe configuration selected and determined by the network side. The invention has the following beneficial effects: the method and system are used in the process of switching the return link subframe configurations changed by the network side; and not only the backward compatibility is ensured but also the problem of selecting appropriate target subframe configuration for return link subframe configuration switching is solved while not introducing the signaling overhead.

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 configuration and indication method of relay sub-frames as well as a method and system for realizing relay transmission, wherein the methods and system provided by the invention are applied to a TDD (time division duplex) system comprising at least one base station and a relay station. The configuration method comprises the following steps: aiming at uplink and downlink configurations on used sub-frames, creating one or more relay sub-frame configuration sets for carrying out uplink and downlink communications between the base station and the relay station; and forming a sub-frame combination by an uplink sub-frame and each downlink sub-frame in the same relay sub-frame configuration set, wherein the sub-frame combination is one of combinations of uplink sub-frames and downlink sub-frames for downlink service transmission and corresponding uplink ACK (acknowledgement) / NACK (negative acknowledgement) feedback information transmission under the uplink and downlink configuration of the sub-frames defined in TDD LTE (long term evolution) Release-8. The invention also provides a corresponding indication method as well as a method and system for realizing the relay transmission. The relay station is used in the system, thus ensuring the backward compatibility for terminals.

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 discloses a transmission processing method of control information from a base station to a relay node. The base station bears control information from the base station to the relay node by adopting at least one mode of resource block bearing, orthogonal frequency division multiplexing (OFDM) symbol bearing and frequency resource bearing; and the relay node receives the control information from a resource block, an OFDM symbol and frequency resources and demodulates corresponding service information according to the control information. The invention also discloses a transmission processing system of control information from the base station to the relay node, provides a mapping mode of a physical downlink control channel (R-PDCCH) from the base station to the relay node link, and realizes that the relay node correctly receives the control information transmission from the base station.

The invention provides a method for designing an eight-antenna codebook based on an LTE-Advanced system, comprising the following steps: determining codon quantity of a codebook which comprises 16 codons under the condition of each order; reusing an LTE R8 four-antenna HH codebook and obtaining a pre-encoder matrix by carrying out kcronecker product on the codons in the codebook and a unitary matrix and working out an LTE-Advanced eight-antenna codebook of an even order by transmitting power of the pre-encoder matrix; and deleting a row of column vectors in the even order codons, generating a pre-encoder matrix, carrying out normalization of emitted energy on the pre-encoder matrix and obtaining an LTE-Advanced eight-antenna codebook of an odd order. The invention not only keeps LTE-Advanced backward compatibility, but also naturally inherits a plurality of excellent characters of the LTE R8 codebook by reusing the LTE R8 four-antenna HH codebook, thereby effectively reducing CQI calculation of a terminal side and complexity of codon selection and avoiding unbalance of the transmitting power.

The invention discloses a method for the interaction of terminals' carrier-information among the wireless network controllers of the multi-frequency carrier system. The information-elements of the carrier frequency, which represent the allocated frequency of the terminals, are increased in the Iur interface-information during the processes of establishing the wireless links, increasing the wireless links, re-configuring the synchronic wireless links or the physical channels, which makes the terminals of DRNC can be controlled by SRNC, so that we can take full advantage of the resources of DRNC Cell. The invention keeps the latter compatibility of single-carrier frequency wireless network controller, which makes the Iur interface of TD-SCDMA system maintain the original capacity and also obtain the capacity of the multi-frequency system.

The invention discloses a method and a device for synchronous cell maintenance of a multi-carrier communication system. The method comprises the steps: under the condition that a plurality of cell subgroups exist, when user equipment maintains a time alignment timer (TAT) only in a subgroup containing a main cell, the user equipment determines whether an auxiliary cell in a subgroups containing the auxiliary cell only in a synchronization state according to a predetermined rule or an indication of a base station. The method and the device disclosed by the invention have the advantage of solving the problems that because the user equipment maintains the TAT only in the subgroup of the main cell, the UE cannot acquire the synchronization condition of a cell in the subgroup only containing the auxiliary cell and thus is likely to carry out uplink signal transmission when the cell in the auxiliary cell subgroup is in a step-out state and a base station side cannot receive uplink signals transmitted by the cells correctly.

The invention discloses a method for realizing access layer security, user equipment, and a node. The method comprises: end-to-tend wireless link access layer security between user equipment (UE) and an initial access node is executed; and end-to-tend wireless backhaul link access layer security between the initial access node and a gateway node is executed. Signals from the UE pass through a communication path for communication between at least two wireless air interfaces and a core network; and the UE, the initial access node, and the gateway node are arranged at the communication path at least. When the communication path includes two wireless air interfaces, the UE and the initial access node carry out communication by a wireless access link; and the initial access node and the gateway node carry out communication by a wireless backhaul link. On the one hand, wireless backhaul link security is only executed in an end-to-end mode between the gateway node and the initial access node, thereby guaranteeing security of user plane data transmission in the wireless backhaul link well; and on the other hand, wireless access link security is executed in an end-to-end mode between the UE and the initial access node, so that the wireless access link transmission security can be ensured and the UE using the LTE technology does not need any modification and thus 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.

The invention provides a method for providing large transmission bandwidth for a long-term evolution multi-carrier system, which comprises the following steps that: a base station sends data through an aggregation frequency range of the long-term evolution multi-carrier system; a first guard band is inserted between effective transmission bandwidths of physical layers of two adjacent LTE frequency ranges to make the center of the effective transmission bandwidths of the physical layers of the LTE frequency ranges be on a channel raster; the first guard band is not available to an LTE terminal; the first guard band is available to terminals of the long-term evolution multi-carrier system, and schedules resources of the first guard band for the long-term evolution multi-carrier system only when the terminals working on the effective transmission bandwidths of the physical layers of at least two adjacent LTE frequency ranges are the terminals of the long-term evolution multi-carrier system in a predetermined time slot; and the terminals receive the data on the aggregation frequency range of the long-term evolution multi-carrier system according to the capacity per se. The method can fully use frequency resources as much as possible on the basis of ensuring backward compatibility and providing adequate frequency guard band.