Abstract:
Embodiments of the present disclosure disclose a signal transmission apparatus and method, and a wireless access node, and relate to the field of communications technologies, so as to resolve a problem that a spectrum cannot be fully used. The method of the present disclosure includes: obtaining, by a wireless access node, configuration information for use to transmit a signal of a second carrier in coverage space of a first carrier, a spectrum occupied by the first carrier and a spectrum occupied by the second carrier overlap, and a subcarrier of the first carrier and a subcarrier of the second carrier are orthogonal; and transmitting, by the wireless access node, the signal of the second carrier according to the configuration information. The present disclosure is applicable to a scenario in which a signal of a carrier is transmitted in coverage space of another carrier.
Abstract:
Embodiments of the present invention provide a cell configuration method, a device, and a system. The method includes: configuring reference uplink signal-to-interference ratios, UL SIRs/a reference uplink signal-to-interference ratio, UL SIR, for the UE in the first cell and/or the second cell, so that a first reference UL SIR for the UE in the first cell is different from a second reference UL SIR for the UE in the second cell. When the UE is located in a soft handover area and a serving cell is the first cell, power control performed by the first cell on the UE is enhanced so that uplink transmit power of the UE can meet a requirement of the first cell.
Abstract:
Embodiments of the present invention disclose an uplink MIMO transmission method, including: sending, by a UE, first data to a base station (NodeB) in a first process in an HARQ_RTT, and receiving an acknowledgement character related to the first data and returned by the NodeB; and determining, by the UE according to the acknowledgement character and a rank value to be used for next transmission, data transmission of the first process in a next HARQ_RTT. The present invention further provides a corresponding user equipment and base station. Implementing the method and apparatus provided by the present invention can enable a UE to correctly perform HARQ transmission using MIMO, thereby effectively ensuring performance of MIMO.
Abstract:
Embodiments of the present invention relate to a precoding indicator combining method, a terminal and a network-side device. The method includes: receiving, by a terminal and from a network-side device, an offset position of a downlink fractional dedicated physical channel F-DPCH or a downlink dedicated physical channel DPCH of at least one cell, and an offset position of a downlink fractional transmitted precoding indicator channel F-TPICH of at least one cell; and determining, by the terminal, a transmitted precoding indicator TPI combining window of the cell, so that an effective position of a TPI is located at a timeslot boundary of the first uplink dedicated physical control channel DPCCH after an end boundary of the TPI combining window, thereby enabling a UE to use a timely TPI and improving demodulation performance of the UE for sending data.
Abstract:
A method, a user equipment and a base station are provided. The method is for transmitting Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) information in a communication system in which two carriers are configured, which includes: a user equipment encodes a codeword of the two carriers. The codeword represents encoded HARQ-ACK information of a first carrier and a second carrier according to a specific encoding scheme of dual-carrier configured with Multiple-Input Multiple-Output (DC-MIMO). The user equipment then transmits the encoded codeword of the two carriers to a base station. Therefore, bit error ratio (BER) and detection error cost are decreased, power overhead is saved, and a cubic metric (CM) value of the system is not affected, thereby enhancing the performance of the system.
Abstract:
A method for managing uplink carrier frequencies is provided, which is applicable to the field of communication. The method includes the following steps: A state switching response message sent by a UE is received, where the state switching response message includes a result of state switching performed by on a secondary uplink carrier serving cell; The result of the state switching is notified to a secondary uplink carrier non-serving cell in a secondary carrier active set through an RNC. A device and a system for managing uplink carrier frequencies are further provided. Through the method, device, and system provided in embodiments of the present invention, the uplink carrier frequencies are managed, so as to facilitate transmission of uplink data during multi-cell collaboration.
Abstract:
A method for transmitting data streams in a multiple input multiple output (MIMO) system is provided, where each data stream is mapped to multiple layers in an MIMO channel space for transmission, and the method includes: performing inter-layer interleaving for N data streams to obtain N interleaved data streams; mapping the N interleaved data streams respectively to N layers in the MIMO channel space, and transmitting the N interleaved data streams that are mapped to the N layers. By using the method of the present invention, a combined CQI can be used in a better way to improve MIMO transmission performance. Further, an impact of inter-layer interference is canceled by using an interference cancellation technology (for example, an SIC technology) based on the inter-layer interleaving.
Abstract:
Embodiments of the present invention disclose a channel configuration method, including generating, by a network side device, channel configuration information, where the channel configuration information is used to configure a downlink fractional-dedicated physical channel F-DPCH and a downlink dedicated physical channel DPCH in a code division manner. The downlink F-DPCH is used for transmission of transmit power control TPC information, and the downlink DPCH is used for transmission of data information. The method includes sending, by the network side device, the channel configuration information to user equipment (UE), so that the UE receives the downlink F-DPCH and the downlink DPCH according to the channel configuration information.
Abstract:
A method for transmitting data streams in a multiple input multiple output (MIMO) system is provided, where each data stream is mapped to multiple layers in an MIMO channel space for transmission, and the method includes: performing inter-layer interleaving for N data streams to obtain N interleaved data streams; mapping the N interleaved data streams respectively to N layers in the MIMO channel space, and transmitting the N interleaved data streams that are mapped to the N layers. By using the method of the present invention, a combined CQI can be used in a better way to improve MIMO transmission performance. Further, an impact of inter-layer interference is canceled by using an interference cancellation technology (for example, an SIC technology) based on the inter-layer interleaving.
Abstract:
The present application discloses a data transmission method, including: sending at least two groups of same data to user equipment; and instructing the user equipment to perform softer combination on the received at least two groups of same data. Embodiments of the present application further provide a corresponding apparatus, including: a base station, user equipment, and a radio network controller. In the technical solutions of the present application, because the user equipment is instructed to process received data in a softer combination manner, reliability can be improved, and a call drop rate can be reduced.