摘要:
A signal transmission method in a Time Division Duplex (TDD) system is disclosed. The method comprises following steps: within a time length of a half-frame of a radio frame, base station transmits signal on a downlink special time slot, thereafter does not transmit signal on a Guard Period (GP), and then receives signal on an uplink special time slot; all time lengths of other uplink or downlink normal time slots for transmitting signal are equal; the total time length of the downlink special time slot, the guard period and the uplink special time slot is integer times of the time length of an uplink or downlink normal time slot. In addition, a frame structure adopted in the TDD system which corresponds to the method is disclosed. The present invention makes it flexible to set the duration of the GP and it is guaranteed that, even if a synchronization signal adopts power promotion, it will not bring great interference to uplink reception of other base stations; in addition, the utilization efficiency of the system is improved.
摘要:
Disclosed are a method and device for sending hybrid automatic repeat request acknowledge information. The method includes: in a TDD system, configuring a terminal to employ a PUCCH format 1b with channel selection method to send HARQ-ACK information; bundling the HARQ-ACK information of downlink subframes of serving cells in a bundling window corresponding to a specified uplink subframe to obtain HARQ-ACK information to be sent by the serving cells; and sending the HARQ-ACK information over an uplink subframe via the PUCCH or PUSCH. By way of bundling the HARQ-ACK information of downlink subframes of serving cells in a bundling window corresponding to a specified uplink subframe, the disclosure can realize sending the HARQ-ACK information when serving cells with different uplink and downlink configurations are aggregated.
摘要:
The present invention provides a method and apparatus for sequencing ZC sequences of a random access channel. The method comprises: setting α as a logical index of each ZC sequence, and u as a physical index of said each ZC sequence, wherein 1≦u≦N−1, 0≦α≦N−2, and N is the length of said each ZC sequence; establishing a mapping relationship between the logical index and the physical index: u=N/2 is taken as a symmetry axis, α is mapped to u in a manner of longitudinal symmetry, and on the upper side of the symmetry axis, u monotonously decreases or increases, while on the lower side of the symmetry axis, u monotonously increases or decreases. This method ensures that the PRACHs of the UEs using different sequences in a same cell have similar coverage, thus the flexibility of cell planning is increased.
摘要:
A method for sending a sounding reference signal (SRS) of uplink channel in a time division duplex system is provided, a terminal calculates the parameters of the resource for sending an SRS in an uplink pilot time slot (UpPTS) according to the configuration information related to the sounding reference signal (SRS) of the uplink channel, the parameters include the frequency domain start position of the resource, and then the SRS is sent over the resource; wherein when the frequency domain start position of the resource is calculated, it is necessary to determine the index of the first sub-carrier in the maximum SRS bandwidth; the terminal determines the index according to the frequency domain position of one PRACH or that of more PRACHs in the uplink pilot time slots, when the PRACH includes the sub-carrier at the lower boundary of the system bandwidth, the upper boundary of the system bandwidth is used as the end position of the maximum SRS bandwidth and the start position of the maximum SRS bandwidth is calculated; and when the PRACH includes the sub-carrier at the upper boundary of the system bandwidth, the lower boundary of the system bandwidth is used as the start position of the maximum SRS bandwidth, and then the index is determined through the start position of the maximum SRS bandwidth plus the offset parameter configured for the terminal. With the sending position of the maximum SRS bandwidth in the UpPTS, which is obtained by the method of the present invention, the interference between the SRS signal and the PARCH can be avoided, and it is possible to implement the channel sounding for more bandwidth.
摘要:
The present disclosure provides a method for allocating physical hybrid ARQ indicator channels, which is used for sending indication information corresponding to multiple uplink sub-frames in the same downlink sub-frame in a TDD system. The method includes: in the TDD system, through an index of a physical resource block where uplink data resides as well as an index of an uplink sub-frame where the uplink data resides, determining an index of a physical hybrid ARQ indicator channel group where a physical hybrid ARQ indicator channel in an downlink sub-frame resides and an intra-group index of the physical hybrid ARQ indicator channel in the physical hybrid ARQ indicator channel group according to an indexing rule, and further determining an index of the physical hybrid ARQ indicator channel by using the index of the physical hybrid ARQ indicator channel group and the intra-group index. According to implicit mapping, the method of the present disclosure implements the allocation of the physical hybrid ARQ indicator channels over which the downlink indication messages corresponding to each uplink sub-frame are transmitted, thereby being capable of overcoming the problem potentially present in existing technologies that multiple indication messages reside on the same physical hybrid ARQ indicator channel.
摘要:
The present invention provides a method and apparatus for sequencing ZC sequences of a random access channel. The method comprises: setting α as a logical index of each ZC sequence, and u as a physical index of said each ZC sequence, wherein 1≦u≦N−1, 0≦α≦N−2, and N is the length of said each ZC sequence; establishing a mapping relationship between the logical index and the physical index: u=N/2 is taken as a symmetry axis, α is mapped to u in a manner of longitudinal symmetry, and on the upper side of the symmetry axis, u monotonously decreases or increases, while on the lower side of the symmetry axis, u monotonously increases or decreases. This method ensures that the PRACHs of the UEs using different sequences in a same cell have similar coverage, thus the flexibility of cell planning is increased.
摘要:
Provided are a method and apparatus for sending Hybrid Automatic Repeat Request Acknowledge (HARQ-ACK) information. The method includes: when a terminal employs a physical uplink control channel (PUCCH) format 3 to transmit HARQ-ACK information and the HARQ-ACK information is transmitted over a uplink physical shared channel (PUSCH), determining the number of downlink subframes for serving cells to feed back the HARQ-ACK information; determining the number of encoded modulated symbols required for sending the HARQ-ACK information according to the determined number of downlink subframes; and mapping the HARQ-ACK information to be sent to the PUSCH of a specified uplink subframe according to the number of encoded modulated symbols and sending the HARQ-ACK information. The technical solutions provided by the disclosure are applied to improve the performance of the HARQ-ACK information, and thus improve the data performance.
摘要:
A method for sending a physical broadcast channel in the TDD system is disclosed, which is: a signal of a physical broadcast channel is not sent in a pilot position, and the signal of the physical broadcast channel is sent on 4 OFDM symbols of the first subframe of one radio frame. Through the present invention, the extension requirement of the physical broadcast channel capacity in the TDD can be met, and the system complexity is reduced due to the normal cyclic prefix and extended prefix using the same sending method.
摘要:
A method for sending a sounding reference signal (SRS) of uplink channel in a time division duplex system is provided, a terminal calculates the parameters of the resource for sending an SRS in an uplink pilot time slot (UpPTS) according to the configuration information related to the sounding reference signal (SRS) of the uplink channel, the parameters include the frequency domain start position of the resource, and then the SRS is sent over the resource; wherein when the frequency domain start position of the resource is calculated, it is necessary to determine the index of the first sub-carrier in the maximum SRS bandwidth; the terminal determines the index according to the frequency domain position of one PRACH or that of more PRACHs in the uplink pilot time slots, when the PRACH includes the sub-carrier at the lower boundary of the system bandwidth, the upper boundary of the system bandwidth is used as the end position of the maximum SRS bandwidth and the start position of the maximum SRS bandwidth is calculated; and when the PRACH includes the sub-carrier at the upper boundary of the system bandwidth, the lower boundary of the system bandwidth is used as the start position of the maximum SRS bandwidth, and then the index is determined through the start position of the maximum SRS bandwidth plus the offset parameter configured for the terminal. With the sending position of the maximum SRS bandwidth in the UpPTS, which is obtained by the method of the present invention, the interference between the SRS signal and the PARCH can be avoided, and it is possible to implement the channel sounding for more bandwidth.
摘要:
Disclosed are a method and device for sending hybrid automatic repeat request acknowledge information. The method includes: in a TDD system, configuring a terminal to employ a PUCCH format 1b with channel selection method to send HARQ-ACK information; bundling the HARQ-ACK information of downlink subframes of serving cells in a bundling window corresponding to a specified uplink subframe to obtain HARQ-ACK information to be sent by the serving cells; and sending the HARQ-ACK information over an uplink subframe via the PUCCH or PUSCH. By way of bundling the HARQ-ACK information of downlink subframes of serving cells in a bundling window corresponding to a specified uplink subframe, the disclosure can realize sending the HARQ-ACK information when serving cells with different uplink and downlink configurations are aggregated.