39results about "Error prevention/detection by using return channel" patented technology

RLC processing section 106 supplies packet data requested for retransmission from a mobile terminal and new packet data not requested for retransmission to buffer 107 corresponding to data amounts controlled in HS-DSCH/FP processing section 108. Buffer 107 temporarily stores the packet data requested for retransmission and the new packet data not requested for retransmission to output at predetermined timing. HS-DSCH/FP processing section 108 detects a receivable data amount of the mobile terminal using CQI, and controls RLC processing section 106 so that the amount of data stored of packet data in buffer 107 does not exceed the receivable data amount of the mobile terminal. It is thereby possible to decrease the number of retransmissions to improve the throughput, and prevent suspension of the communication and disconnection of the channel.

An S/P converting section (101) converts input transmission signals A1, A2, B1, B2, . . . , K1, K2 to parallelized data, separated in individual transmission lines. Spreading sections (102, 103) spread the respective data under control of a spread control section (107). Adding sections (104-1, 104-2) multiplex spread data. Transmitting sections (105-1, 105-2) provide radio transmission processing to the multiplexed signals, and transmit the data via antennas (106-1, 106-2) by radio. The spread control section (107) controls the spreading methods in the spreading sections (102, 103) based on channel quality. This makes it possible to improve error rate characteristics of the received signal and as maintain spectrum efficiency when varying data is transmitted from multiple antennas.

The invention relates to a mapping device of a physical communication channel in an orthogonal frequency-division multiplexing system and a mapping method thereof, wherein the method implements the following steps to each flow of symbols which is generated after a code clock in a transmission block is processed, firstly orderly dividing the flow of symbols into a plurality of resource block transmission units with the resource block transmission length, secondly, determining the mapping area which integrates the resource blocks which are corresponding to the flows of symbols and the quality indicated value of the communication channels which are respectively corresponding to the resource blocks in the area, thirdly, mapping the resource transmission block unit which is near to the front most position of the unmapped position into the resource block whose indicated value of the unmapped communication channel quality is the biggest. The method improves the decrypting accuracy of a terminal and reduces the retransmitting frequency through mapping the RB transmission unit whose position is near to the front position in the flow of signals into the RB with higher CQI value.

A radio link (RL) parameter updating method of a high speed downlink packet access (HSDPA) system in a mobile communication system is disclosed. According to a radio channel situation of a terminal, an RL parameter applied to transmission and reception of control information between the terminal and a base station is dynamically controlled. For this purpose, the RL parameter updating method includes: a step in which the base station determines whether to update an HSDPA related parameter and transmits the parameter update information to the RNC to trigger updating of the RL parameter; and a step in which the RNC updates the HSDPA related parameter and transmits it to the terminal. The parameter update information is delivered through an RL parameter update response message, and the RNC is a serving RNC.

In a method for repeat transmission of messages in a centrally controlled communication network including a plurality of terminals and a central station messages assigned sequence numbers are broadcast or multicast from the central station for reception by terminals of a participating group. As soon as a terminal detects loss of a transmitted message or an error in the transmitted message, it transmits a repeat request for repeat transmission of that message, which includes the sequence number of the lost or erroneous message, over another communication link, especially a point-to-point communication link. The central station repeats the message transmission of the lost or erroneous message but only until a predetermined maximum number of repetitions occurs within a predetermined time interval or until a positive acknowledgement of receipt of the previously lost or erroneous message is received.

A transmitting unit divides a transmit data into a plurality of code blocks, and encodes each of the plurality of code blocks to generate a transmission signal. The transmitting unit transmits the transmission signal, and a receiving unit receives the transmission signal as a reception signal. The receiving unit receives performs an iterative decoding to each of the plurality of code blocks of the reception signal. The iterative decoding is terminated to a first code block group in which an error has not been detected before a first setting iteration count. The receiving unit, when being an error in the reception signal, transmits a retransmission request feedback data which contains a NACK data and a data indicating the first code block group to the transmitting unit. First resources are assigned for each of the plurality of code blocks of the transmission signal. The transmitting unit assigns resources of the first code block group of the plurality of code blocks of the transmission signal to second resources which are fewer than the first resources, based on the retransmission request feedback data, and retransmits the transmission signal to the receiving unit.

Transmission process is as follows: host A of sanding and forwarding multicast data sends at least one piece of multicast data stream to host B of receiving data; in process of receiving multicast data stream, the host B monitors whether there are data of error packets or lost packets continuously; after finding out and receiving data of error packets or lost packets, the host B sends out request for reissuing packets to host C of reissuing packets in agreed address according unicast protocol; using at least one agreed address, the host C in agreed address receives the said request, and sends reissuing data of packets to host B according to unicast protocol; the host B integrates the received multicast data of containing lost packets with unicast reissuing packets so as to complete data stream or complete data stream partially. The invention solves issue of poor reliability of transmitting data in multicast protocol, and suitable to network of using multicast and unicast modes.

Provided a method and device for efficiently retransmitting packets of which transmissions failed in wired/wireless network including detecting continuity by detecting whether or not a sequence ID of a received packet is continuous with a start sequence ID or an end sequence ID of packets included in reception blocks which are generated in advance of the received packet; depending on the result of the detection, manipulating reception blocks to renew or delete the reception blocks or generate a new reception block by using the sequence ID of the received packet; and transmitting an EBN (Explicit Block NACK) for requesting retransmission of lost packets in units of a block when discontinuity is detected.

A method in which a first apparatus performs wireless communication and an apparatus supporting the same are provided. The method may include: receiving information related to a physical sidelink feedback channel (PSFCH) resource from a base station; receiving a physical sidelink shared channel (PSSCH) from a second apparatus; and transmitting a PSFCH related to the PSSCH to the second apparatus. Here, the information related to the PSFCH resource may include, for example, information related to a resource block (RB) available for the first apparatus to transmit the PSFCH.

The invention provides a delay determinacy message retransmission method with a local cache. A receiving end requests data which needs retransmitted from a sending end unequivocally, and information of more than one lost data section is included in a request. The local cache is arranged, lost messages can be subjected to local retransmission, and accordingly the phenomenon of packet loss of a reverse link ACK can be avoided. The method is a strategy through which loss restoring is carried out quickly with limited bandwidth, on a channel with large delay and error rate and asymmetric link bandwidth, the frequency and the amount of message retransmission are reduced, and the problem of channel efficiency lowering during packet loss caused by reverse channel bandwidth limiting on the channel is avoided. By arranging the local cache, the problem that channel transmission efficiency is low due to large delay when reverse ACK messages are lost can be solved. According to the method, satellite link message retransmission efficiency can be greatly improved, and satellite channel using rate is greatly improved.

The invention discloses a method for adjusting a channel quality indicator (CQI) and equipment. According to the method, a CQI during primary transmission of user data is adjusted according to the magnitude relationship between current retransmission number of times and preset retransmission number of times of the user date, and the user date is retransmitted by the use of the adjusted CQI. Thus, HARQ gain and the preset retransmission number of times corresponding to different business types of users are combined, self-adapting adjustment of the retransmission CQI is realized, and system performance is improved.

The embodiment of the invention discloses a method for determining a target eNB in a switching process. The method comprises that: after receiving a switching request of a source eNB, an alternative target eNB feeds self real-time load information back to the source eNB; and the source eNB determines the target eNB from each alternative target eNB according to a measurement value in a measurementreport sent by UE and the load information, wherein the measurement value in the measurement report means a power value of a signal of the eNB received by the UE. The embodiment of the invention can comprehensively consider the measurement report sent by the UE and the current load condition of the alternative target eNB to determine the target eNB so as to ensure the communication quality betweenthe determined target eNB and the UE.

A communication device for handling a HARQ process in a LAA SCell comprises a storage unit and a processing circuit configured to execute instructions stored in the storage unit. The instructions comprise receiving at least one UL grant from a network in a DL subframe, wherein a UL grant of the at least one UL grant schedules at least one PUSCH transmission associated with a UL HARQ process in at least one UL subframe, and a first timer and a second timer are associated with the UL HARQ process; starting the first timer in a first UL subframe of the at least one UL subframe, if the communication device is not able to perform a PUSCH transmission of the at least one PUSCH transmission in the first UL subframe; starting the second timer, when the first timer expires; and monitoring a PDCCH, when the second timer is running.

The present invention provides a downlink HARQ feedback method under a TDD system and a downlink HARQ feedback device under a TDD system. The downlink HARQ feedback method under a TDD system comprises: receiving downlink data transmitted on a subframe n in a current frame; feeding HARQACK or NACK feedback information for the downlink data back onto a target uplink subframe, wherein the target uplink subframe is an uplink subframe n+k in the current frame or an uplink subframe (n+k)%10 in the next frame adjacent to the current frame, % is a remainder operator, n is an integer from 0 to 9, and k is a preset value greater than 0. By the technical scheme of the invention, a downlink HARQ feedback time sequence can meet the minimum delay requirement of the TDD system and the control information overhead on each uplink subframe can also be effectively balanced.

The invention provides a resource configuration method, a terminal and a network device, and solves the problem that a clear method for configuring semi-persistent resources does not exist yet when aplurality of different beams or transmission points are adopted to transmit and receive data to UE. The resource configuration method provided by the embodiment of the invention comprises the following steps: acquiring resource configuration information of semi-persistent resources, wherein the resource configuration information comprises identification information of a plurality of transmission carriers and resource allocation information corresponding to the identification information of each transmission carrier; and determining at least one of available resource position information of thetransmission carrier in each resource period and a hybrid automatic repeat request (HARQ) process number available in each resource period according to the resource configuration information of the semi-persistent resources. According to the invention, different semi-persistent resources are configured on different uplink transmission carriers and/or downlink transmission carriers, the utilization rate of the semi-persistent resources under multiple transmission carriers is improved, and meanwhile, the time delay generated by scheduling during data transmission is reduced.

The invention discloses a repositioning processing method which comprises the following steps: the type of repositioning is as follows: when the repositioning does not involve a service radio network subsystem of user equipment, a target radio network controller (RNC) checks out that an encryption algorithm currently used by a source RNC in a repositioning request message is not matched with the encryption algorithm selected by a target RNC; and the target RNC returns a repositioning failure message to the source RNC. The invention also discloses a repositioning processing system. In the system, when the encryption algorithm currently used by the source RNC is not matched with the encryption algorithm selected by the target RNC, the target RNC returns the repositioning failure message to the source RNC through a repositioning failure message feedback unit. By adopting the method and the system, the problem of repositioning process failure caused as the encryption algorithm selected by the target RNC is different from the encryption algorithm currently used by the source RNC in the scene of SRNS repositioning not involving the UE can be solved.

The invention provides a low-overhead coding perception wireless Mesh network routing protocol design method, and belongs to the field of wireless Mesh network technology. During operation, the method comprises operation in two stages of route discovery and route selection. Two new mechanisms of 'low-overhead coding opportunity detection' and 'centralized coding opportunity confirmation' are adopted. In the route discovery process, the information needed by the coding opportunity detection is added to the route reply message sent in the unicast mode, so that the purpose of carrying out the coding opportunity detection while carrying out the route discovery can be achieved, and the control overhead introduced by the coding opportunity detection is reduced. In the route selection process, the source node judges whether the non-coding node exists or not according to the overall information of the path, calculates the route metric value of the path and selects the optimal data transmission path, so that the situation that a coding packet cannot be decoded due to coding conflicts is avoided, and the utilization rate of network bandwidth resources can be improved.

A method collects data in a network by operation of a local sensor of a consumption meter where the network is part of a supply network. The network distributes a consumable good. The sensor has a measuring element providing raw measurement data corresponding to a physical or physicochemical value or parameter. The sensor has a wired and/or radio communication device and a memory. For the determination of the measurement resolution of the sensor the conditions for generating time stampings using a correlation model are determined in advance, on the basis of the correlation model time stampings of successive raw measurement data in the sensor are generated. The time stampings are transmitted over a wired connection and/or a radio link so that on the basis of the time stampings using the correlation model the raw measurement data collected by the measuring element are reconstructed and evaluated and used for network monitoring.

The invention provides a bandwidth access apparatus and applications thereof, core of the bandwidth access apparatus is that: a video server unit is provided within the bandwidth access apparatus, the internally provided video server unit transmits the stored services to a user terminal via the bandwidth access apparatus according to a request of the user terminal. The invention lessens the bandwidth requirement of the video services to the access network and convergence network, solving efficiently the bottleneck problem of bandwidth of a backbone network and the convergence network; the invention does not have influence on design principles that the current bandwidth access network and the convergence network do not realize exchange for video services, simplifies resource management mechanism for entire access network and the convergence network and complexity for managing the resources of the access network, thus enhancing utilization rate of the network bandwidth, reducing complexity for managing the network resources and eliminating bottleneck of the video server.

The invention provides an uplink non-orthogonal multiple access transmission feedback method, device and system. A base station feeds back group-based common control signaling to UE according to a detection result, and respectively feeds back special control signaling of the UE to the UEs with the same detection result and few UEs in the group, so that the UE carries out new transmission or retransmission according to a feedback result indicated by the special control signaling when the UE detects the special control signaling for the UE and the feedback result exists, otherwise, new transmission or retransmission is performed according to the detected feedback result based on the common control signaling indication of the group where the UE is located, wherein the detection result for onegroup in the common control signaling is the detection result corresponding to the UEs with the same detection result and a large number of UEs in the group and the detection result in the special control signaling is the detection result of the corresponding UE. According to the method, the system transmission efficiency can be improved on the basis of saving the signaling overhead.