摘要:
A random access method and a related apparatus are disclosed. The method includes: receiving first signaling, which is sent by a base station to an eIMTA user equipment through a physical downlink shared channel PDSCH, and receiving second signaling, which is sent by the base station to the eIMTA user equipment through a physical downlink control channel PDCCH or an enhanced physical downlink control channel ePDCCH, where the first signaling includes a first time division duplexing TDD uplink-downlink configuration, and the second signaling includes a second TDD uplink-downlink configuration; determining, by the eIMTA user equipment according to the first TDD uplink-downlink configuration, an uplink subframe for sending a random access message 3; and sending, by the eIMTA user equipment, the random access message 3 to the base station in the determined uplink subframe. A corresponding apparatus is further disclosed. Both a non-eIMTA user equipment and an eIMTA user equipment send random access messages 3 by uniformly using an uplink subframe determined according to an uplink-downlink configuration that is included in signaling sent through a physical downlink shared channel, so that a base station can accurately receive the random access messages 3 sent by the non-eIMTA user equipment and the eIMTA user equipment.
摘要:
Embodiments of the present invention provide a wireless communications method, user equipment, a base station and a system, and relate to the field of wireless communications. The method includes: acquiring a frequency domain spreading factor, a symbol-level spreading factor and a transmission time interval-level spreading factor; and performing frequency domain spreading, symbol-level spreading and transmission time interval-level spreading on first to-be-sent information respectively according to the acquired spreading factors and sending first spread information; or, despreading, according to the acquired spreading factors, second spread information sent by a base station. By acquiring a frequency domain spreading factor, a symbol-level spreading factor and a transmission time interval-level spreading factor, and sending or receiving information according to the acquired spreading factors, the present invention solves problems in the prior art that when simple repetitive sending is performed in a frequency domain or time domain, sending efficiency is low, delay is relatively long, and interference between user equipments in a same frequency band bandwidth is relatively severe, and achieves an objective of improving system capacity and resource utilization.
摘要:
Embodiments of the present invention relate to the field of communications technologies, and provide a communication method, a base station, user equipment, and a system. The method includes: receiving uplink data that is sent by the user equipment in a specified multiple-access manner on a time-frequency resource corresponding to the specified multiple-access manner; and sending downlink data to the user equipment in a corresponding multiple-access manner on a time-frequency resource corresponding to the corresponding multiple-access manner, where the corresponding multiple-access manner is a multiple-access manner that is obtained by searching the at least two multiple-access manners according to a prestored correspondence and that is associated with the specified multiple-access manner received by the uplink receiving module. In this way, a problem that because one multiple-access manner is used in a same communications system, requirements of different user equipments cannot be met at the same time is resolved, and an effect of meeting requirements of different user equipments is achieved because a same communications system can provide multiple multiple-access manners at the same time for selection by user equipment.
摘要:
Embodiments of the present invention provide a data sending method, forwarding method, receiving method, apparatus, and system, and relate to the field of communications technologies. The method includes: pre-storing data that needs to be sent to a target user equipment to a public logical channel buffer in a base station; selecting a user equipment meeting a predefined condition from a user equipment within a short-distance transmission range of the target user equipment as a transit user equipment; and sending the data in the public logical channel buffer to at least the transit user equipment, so that the transit user equipment forwards the data to the target user equipment. This solves the problem in the prior art that the size of data a base station pre-distributes to a logical channel buffer corresponding to each user equipment for buffering cannot precisely match the size of data the base station needs to schedule and send to the user equipment in an actual sending process and therefore low data transmission efficiency is caused due to unreasonable pre-distribution.
摘要:
Embodiments of the present invention disclose a method for retransmitting a message, mainly including: notifying, by a terminal, a base station that the terminal is a narrowband terminal when sending a random access preamble to the base station; and when the base station subsequently detects that an error occurs to a message 3 sent by the terminal, instructing, by the base station, through a message 3 retransmission indicator, the terminal to retransmit the message 3, or retransmitting, by the terminal, the message 3 to the base station in a manner for actively retransmitting the message 3. The embodiments of the present invention further disclose a terminal and a base station. By adopting the present invention, a narrowband terminal can retransmit a message 3 in a random access process.
摘要:
Disclosed are a method, a base station and a user equipment for subframe configuration in a time division duplex system. The method comprises: a base station determining a subframe number of a flexible subframe in a radio frame; the base station determining a feature of the flexible subframe corresponding to the subframe number, where the feature indicates that the flexible subframe is an uplink subframe or a downlink subframe; and the base station sending to a user equipment a first signaling via a downlink control channel, where the first signaling includes the feature of the flexible subframe corresponding to the subframe number. By applying the method, the base station and the user equipment in the embodiments of the present invention, the object that the base station notifies the user equipment that a particular flexible subframe is an uplink subframe or a downlink subframe via signaling can be achieved, and the user equipment can communicate normally with the base station when knowing the feature of the flexible subframe.
摘要:
The present invention discloses a downlink control information sending method and device, and a downlink control information receiving method and device. The sending method includes: sending, by a base station device, downlink control information DCI on a physical downlink control channel PDCCH of a downlink subframe, where the DCI is used to instruct user equipment UE to receive physical downlink shared channel PDSCH information in an uplink subframe; and sending the PDSCH information in the uplink subframe. In this way, the base station can effectively schedule an uplink subframe, and a purpose of transmitting a downlink service by using an uplink subframe is achieved, which not only improves utilization of a wireless spectrum resource corresponding to the uplink subframe, but also effectively diverts load pressure of a wireless spectrum resource corresponding to a downlink subframe. Therefore, overall utilization of wireless spectrum resources of a system is improved.
摘要:
Embodiments of the present invention provide a network listening method and device, where the method includes: determining, by a first device according to a type of a network listening resource, a time-frequency pattern that is of a first sequence and is corresponding to the network listening resource of this type; and then transmitting the first sequence to a second device by using the time-frequency pattern of the first sequence, so that the second device performs network listening according to the first sequence. The time-frequency pattern of the first sequence determined in this process is a time-frequency pattern obtained by transforming a time-frequency pattern of a base sequence, and a network listening signal obtained therefrom, that is, the time-frequency pattern of the first sequence, is simple, which can achieve a purpose of reducing complexity of generating a network listening signal and computational complexity of parsing a network listening signal.