43results about How to "Increase frequency diversity gain" patented technology

A method of enhancing a downlink channel coding structure in an OFDMA (orthogonal frequency division multiple access) communication system is provided. The method includes: segmenting a concatenation of multiple transport blocks amongst multiple component carriers; and separately performing link adaptation for each component carrier according to channel conditions experienced by that component carrier.

The present invention discloses a method for transmitting uplink control channel, a device and a system thereof. In the solution of the invention, after the CCE index and UE corresponding with the first CCE of PDCCH corresponding to the PDSCH resource allocation transmit the PUCCH resource index implicit mapping of PUCCH resource of HARQ-ACK package information, the RB indexes of resource block RB of PUCCH resource which transmits HARQ-ACK package information between two different time slots are respectively RB1,k and RB2,k, k, wherein k is selected from the range from 0 to N-1, and wherein N is the number of carrier component comprising PDSCH. The HARQ-ACK package information is transmitted selectively in the PUCCH resource corresponding with PDSCH on the K'-th carrier component, and k' satisfies the following relationship: k'=arg max(Metric(k)), wherein Metric(k)=abs(RB1,k-RB2,k). The PUCCH resource index of PUCCH resource is nPUCCH, k'. The maximum of RB index difference value means the maximum span length of frequency resource corresponding with two time slots on the frequency domain, thereby a larger frequency diversity gain can be obtained thereby enhancing the transmission efficiency of PUCCH and the transmission quality of whole transmission system is increased.

A method of wirelessly transmitting control information includes generating control information comprising a plurality of control bits and encoding the control bits using a block code that outputs an encoded bit sequence comprising encoded bits b(0), b(1), . . . , b(19). The control bits are encoded using the block code by generating a linear combination of a plurality of basis sequences. The method also includes dividing the encoded bits into a first group and a second group. The first group includes the encoded bits {b(0), b(1), b(5), b(6), b(8), b(11), b(12), b(14), b(17), b(19)} and the second group includes the encoded bits {b(2), b(3), b(4), b(7), b(9), b(10), b(13), b(15), b(16), b(18)}. Additionally, the method includes transmitting the first group of encoded bits on a first set of carriers and transmitting the second group of encoded bits on a second set of carriers. The second set of carriers have different frequencies from the first set of carriers.

The invention discloses a method for transmitting prefix channel data in a frequency division multiplexing system. The method comprises the following steps: firstly, the data to be transmitted of the prefix channel of each section is modulated into modulation symbols; then the modulation symbols of the identical prefix channel of the identical section are dispersively mapped on sub-carrier frequency resources; and finally, the modulation symbols of the prefix channels of the sections are transmitted after being mapped. The invention also discloses a device for transmitting prefix channel datain a frequency division multiplexing system. By adopting the technical proposal, the frequency diversity gain can be increased, and the ability of the system of overcoming the negative influence brought by the selective fading of the frequency can be further enhanced.

The invention discloses a method and a system for transmitting channel quality indicator (CQI) information. The method comprises the following steps of: interweaving the channel quality indicator information of a plurality of downlink component carriers by a predetermined method so as to obtain a plurality of interwoven channel quality indicator information; and transmitting the plurality of interwoven channel quality indicator information through a plurality of physical uplink control channels, namely PUCCHs. By means of the method and the system, the problem of poor transmission quality of the PUCHH because the PUCCH under different channel conditions bears the CQI of each component carrier respectively and the problem that the plurality of component carriers cannot be utilized fully to acquire the frequency diversity grain in the prior art are solved by interweaving the CQI information of the plurality of downlink component carriers before the CQI information of the plurality of downlink component carriers are transmitted. Through the technical scheme of the invention, the transmission quality of the PUCCH can be improved and a high frequency diversity gain is acquired so as to improve the overall performance of the system.

The invention discloses adaptive hybrid automatic repeat request (HARQ) technology, is applied to a system adopting frequency spectrum polymerization technology and provides a method for implementing adaptive HARQ by crossing carriers. The scheme is simple and effective, and the normal and high-efficiency work of the system is guaranteed. Particularly, an adaptive retransmission method comprises the following steps of: detecting physical downlink control channel (PDCCH) on a carrier and acquiring HARQ information; judging whether the HARQ information is retransmission data according to NDI in the HARQ information, and acquiring an HARQ process number in the system; reading CCI in the PDCCH, allocating related information according to resources in the PDCCH, and acquiring transmitted data from the carrier indicated by the CCI, if the NDI indicates the retransmission data, reading rv in the HARQ information, merging the acquired data with data in a soft cache corresponding to the HARQ process number of the system, accessing the merged data into the soft cache, performing cyclic redundancy check (CRC) on the data in the soft cache, if the data is verified to be accurate, transmitting an acknowledgement (ACK) signal to a base station, otherwise transmitting a negative acknowledgement (NACK) signal to the base station.

The invention discloses an emitting method of a frequency hopping signalling, comprising: the step S202, a station preallocates the frequency hopping parameter for the users, and the users performs the frequency hopping emission according to the frequency hopping parameter; the step S204, when the user requests to dispatch, the user uses the preallocated frequency hopping parameter, or uses the station to perform the frequency hopping emission for the allocated new frequency hopping parameter. In addition, the invention also discloses a frequency hopping mode and a dispatching signalling collocation method. According to the invention, the user in the district keeps in quadrature, to randomize the disturb suffered by the user, wherein the single granularity and the multi-granularity of the bandwidth always occupy the continuity of the sub-carrier, reduces the demand of the signalling.

The invention discloses a data transmission method and device. The method includes the steps that a set S formed by different combinations of frequency hopping fhop values between sub-bands and mirror image frequency hopping fm values is acquired, wherein Nhop, and Nm represent the magnitude of the set S; according to cellular identifiers, the combination of the fhop values and the fm values corresponding to the output time index i is determined, wherein i is an integer from 0 to Ni-1, and Ni represents the output time index number and is contained in the set S; according to the physical resource block position nPRB(i) of transmitted data at the output time with the index being i, data are transmitted on time-frequency resources corresponding to the physical resource block position nPRB(i). With the method and device, frequency diversity gain of data is improved.