Abstract: Disclosed is a radio resource reuse method, a base station device, a terminal device, and a radio communication system. The system at least comprises two adjacent cells Ci (i=1, 2), using time-frequency resource, denoted as S for communication, which is divided into at least two resource units, each of the resource units being one time-frequency resource block. The method comprises: dividing the time-frequency resource S into N non-overlapping resource groups, denoted as RGn (n=1, 2, . . . , N), N being an integer larger than 1, and each of the resource groups comprising at least two of the resource units; and dividing RGn (n=1, 2, . . .

Abstract: Disclosed is a radio resource reuse method, a base station device, a terminal device, and a radio communication system. The system at least comprises two adjacent cells Ci (i=1, 2), using time-frequency resource, denoted as S for communication, which is divided into at least two resource units, each of the resource units being one time-frequency resource block. The method comprises: dividing the time-frequency resource S into N non-overlapping resource groups, denoted as RGn (n=1, 2, . . . , N), N being an integer larger than 1, and each of the resource groups comprising at least two of the resource units; and dividing RGn (n=1, 2, . . .

Abstract: A method and an apparatus for data signal transmission are disclosed. A data signal is coded through space-time-frequency coding to form k1 space-time-frequency bit streams. P of the k1 space-time-frequency bit streams are divided into Ki orthogonal components respectively, in which a modulus of an inner product of any two of the Ki orthogonal components is equal to zero or smaller than a set value. The data signal can be restored through the Ki orthogonal components, but cannot be restored though the remaining orthogonal components apart from any one non-zero orthogonal component. All orthogonal components are provided for virtual antennas of N base stations, and are mapped to Mj physical antennas of the base station for transmission.

Abstract: A method for cell/sector coverage of a public channel through multiple antennas includes: dividing the physical resource for transmitting public channel signals in a frame into N physical resource blocks; generating N weighting vectors, where: each weighting vector comprises M weighting coefficients, M is equal to the number of antennas, and the difference of average antenna gain for N weighting vectors in different directions of a whole cell/sector is less than a preset value; selecting one of the N weighting vectors for each of the N physical resource blocks respectively, where the weighting vector varies with different physical resource blocks; and using the M weighting coefficients in the selected weighting vectors to weight the public channel signals in M antennas respectively, and transmitting the weighted public channel signals through the M antennas. In addition, an apparatus for cell/sector coverage of a public channel through multiple antennas is disclosed.

Abstract: A method for controlling multi-antenna signal transmission includes: at a first transmission time, selecting a weight vector of a signal beam whose fluctuation in angle dimension is smaller than a preset value as a first basic weight vector; weighting a signal of each antenna array element in a multi-antenna system by using the first basic weight vector, to obtain a first weighted signal on each antenna array element; and delaying the first weighted signal on each antenna array element for a corresponding set time period, so that the multi-antenna system has different transmission modes at different frequencies, and transmitting each delayed first weighted signal through its corresponding antenna array element.

Abstract: A method and an apparatus for data signal transmission are disclosed. A data signal is coded through space-time-frequency coding to form k1 space-time-frequency bit streams. P of the k1 space-time-frequency bit streams are divided into Ki orthogonal components respectively, in which a modulus of an inner product of any two of the Ki orthogonal components is equal to zero or smaller than a set value. The data signal can be restored through the Ki orthogonal components, but cannot be restored though the remaining orthogonal components apart from any one non-zero orthogonal component. All orthogonal components are provided for virtual antennas of N base stations, and are mapped to Mj physical antennas of the base station for transmission.

Abstract: A method and apparatus for transmitting signals in a Multiple Antennas System (MAS) are disclosed. The method includes performing Alamouti coding on each group of common channel symbols to form two branches; selecting different weight vectors for different branches to perform beamforming, obtaining transmitting signals of each branch on each antenna, where beam modes corresponding to different weight vectors are uncorrelated and the peak-to-average power ratio of angle dimension of the two beam modes are lower than a preset threshold; and superimposing the transmitting signals of these two branches on each antenna, and transmitting the superimposed signals. In the present invention, the Alamouti coding is introduced, and a spatial diversity gain is generated by using the independence of two virtual channels. Thus, the performance of the MAS in full coverage is enhanced.

Abstract: A method and apparatus for transmitting signals in a Multiple Antennas System (MAS) are disclosed. The method includes performing Alamouti coding on each group of common channel symbols to form two branches; selecting different weight vectors for different branches to perform beamforming, obtaining transmitting signals of each branch on each antenna, where beam modes corresponding to different weight vectors are uncorrelated and the peak-to-average power ratio of angle dimension of the two beam modes are lower than a preset threshold; and superimposing the transmitting signals of these two branches on each antenna, and transmitting the superimposed signals. In the present invention, the Alamouti coding is introduced, and a spatial diversity gain is generated by using the independence of two virtual channels. Thus, the performance of the MAS in full coverage is enhanced.

Abstract: A method for implementing soft time reuse includes: selecting for a cell or sector at least one time slot as a primary time slot and at least another one time slot as a secondary time slot; using the primary time slot at the border of the cell or sector; setting a first transmit power threshold for the primary time slot; setting a second transmit power threshold for the secondary time slot; the primary time slot selected for the cell or sector and a primary time slot selected for another cell or sector adjacent to the cell or sector are non-overlapped, and the first transmit power threshold is higher than the second transmit power threshold. A system is also provided by the embodiments of the present invention. The system and method reduce the interference between cells or sectors effectively and improve the resource utilization.

Abstract: A method for cell/sector coverage of a public channel through multiple antennas includes: dividing the physical resource for transmitting public channel signals in a frame into N physical resource blocks; generating N weighting vectors, where: each weighting vector comprises M weighting coefficients, M is equal to the number of antennas, and the difference of average antenna gain for N weighting vectors in different directions of a whole cell/sector is less than a preset value; selecting one of the N weighting vectors for each of the N physical resource blocks respectively, where the weighting vector varies with different physical resource blocks; and using the M weighting coefficients in the selected weighting vectors to weight the public channel signals in M antennas respectively, and transmitting the weighted public channel signals through the M antennas. In addition, an apparatus for cell/sector coverage of a public channel through multiple antennas is disclosed.

Abstract: The present invention discloses a call access control (CAC) method applicable to call access during call initiation and cell switching in TDD-CDMA mobile communication system. The method comprises: counting the number of accessed subscribers in all current communication time slots of the home base station for an access request from a new subscriber, to determine channel resource occupations in different time slots; comparing the channel resource occupations in the different time slots, and then allocating idle resource units in the time slots having available channel resources and the minimum number of accessed subscribers to the subscriber sending the access request. The present invention achieves dynamic allocation of channel resources in cells and have an advantage of simple implementation and applicability.

Abstract: The present disclosure discloses a signal modulation method based on orthogonal frequency division multiplex, including: determining a baseband frequency range according to a baseband chip rate; determining N frequency range subsets within the baseband frequency range, wherein N is a natural number; selecting n(1nN) frequency range subsets from the N frequency range subsets, wherein 1nN; generating a baseband signal whose frequency range is restricted to the n frequency range subsets; and modulating the baseband signal generated onto a carrier. Correspondingly, the present disclosure further provides a signal modulation device based on orthogonal frequency division multiplex. With the present disclosure, a terminal and a base station may implement communication based on different transmission bandwidths even if they only support a set of parameters.

Abstract: A method for implementing soft time reuse includes: selecting for a cell or sector at least one time slot as a primary time slot and at least another one time slot as a secondary time slot; using the primary time slot at the border of the cell or sector; setting a first transmit power threshold for the primary time slot; setting a second transmit power threshold for the secondary time slot; the primary time slot selected for the cell or sector and a primary time slot selected for another cell or sector adjacent to the cell or sector are non-overlapped, and the first transmit power threshold is higher than the second transmit power threshold. A system is also provided by the embodiments of the present invention.

Abstract: The embodiments of the present invention disclose a method, system and apparatus for implementing soft frequency reuse in a wireless communication system, the method includes: selecting for a cell or sector at least one carrier as a primary carrier and at least one carrier as a secondary carrier, the primary carrier and the secondary carrier are different; setting a first transmit power threshold for the primary carrier; setting a second transmit power threshold for the secondary carrier; the primary carrier selected for the cell or sector and a primary carrier selected for another cell or sector adjacent to the cell or sector are non-overlapped, and the first transmit power threshold is higher than the second transmit power threshold. The method, system and apparatus may reduce inter-cell interference and fully utilize frequency resources.

Abstract: The present invention discloses a call access control (CAC) method applicable to call access during call initiation and cell switching in TDD-CDMA mobile communication system. The method comprises: counting the number of accessed subscribers in all current communication time slots of the home base station for an access request from a new subscriber, to determine channel resource occupations in different time slots; comparing the channel resource occupations in the different time slots, and then allocating idle resource units in the time slots having available channel resources and the minimum number of accessed subscribers to the subscriber sending the access request. The present invention achieves dynamic allocation of channel resources in cells and have an advantage of simple implementation and applicability.