摘要:
Embodiments of the present invention provide a PRACH preamble sending method, a device, and a system. A controller determines access slot information according to at least one PRACH preamble repetition. The access slot information includes a start AS corresponding to each RACH sub-channel. ASs that start from the start AS and whose quantity is the quantity of PRACH preamble repetitions are used by same UE to send a same PRACH preamble. The controller sends the access slot information to each UE, so that each UE repeatedly sends a PRACH preamble to a base station according to the access slot information, and the ASs that start from the start AS and whose quantity is the quantity of PRACH preamble repetitions are all used by the same UE to repeatedly send the PRACH preamble to the base station. This resolves a problem that a possibility of a collision is increased due to repeatedly sending the PRACH preamble, thereby reducing a probability of an access failure.
摘要:
Embodiments of the present invention relate to the field of communications, and provide a method and an apparatus for controlling transmit power of user equipment. The method includes: when total uplink transmit power of user equipment UE exceeds maximum allowed transmit power, calculating a first gain factor according to the maximum allowed transmit power; performing quantization processing on the first gain factor according to a gain factor of a first physical channel, to obtain a second gain factor, where the first physical channel includes a dedicated physical control channel 2 DPCCH2; reducing a gain factor of a second physical channel to the second gain factor, to reduce transmit power of the second physical channel, so that the total uplink transmit power of the UE does not exceed the maximum allowed transmit power, where the second physical channel includes a high speed dedicated physical control channel HS-DPCCH. In the present invention, a gain factor of an HS-DPCCH is reduced by using a gain factor of a DPCCH2, so as to reduce transmit power of the HS-DPCCH. This reduces a calculation error and improves control accuracy of transmit power.
摘要:
This application provides an access control apparatus and method, and an access apparatus and method. The access control apparatus includes: a receiving unit, configured to receive a first preamble sequence; a determining unit, configured to determine an acquired-terminal group; and a sending unit, configured to send a first acquisition indicator; where the receiving unit is further configured to receive a second preamble sequence, the determining unit is further configured to determine an acquired terminal, and the sending unit is further configured to send a second acquisition indicator, where the second acquisition indicator is used to indicate access of the acquired terminal. In the present invention, a process of contending for an access resource by a terminal in an M2M network transforms from one-phase contention to two-phase contention, and each time a base station receives only a first preamble sequence sent by each group leader or a second preamble sequence sent by a terminal in an acquired group, so that a quantity of preamble sequences received by the base station each time can be greatly reduced, thereby effectively reducing load of the base station.
摘要:
The present invention discloses UE, a network node, and a method for determining a transmitting manner of a downlink signal of a cell. The method includes: obtaining, by User equipment (UE), first attribute indication information of a first cell, where the first cell is any cell other than a cell serving the UE, and the first attribute indication information of the first cell includes at least one of the following: a radio access standard supported for signal transmitting by the first cell, a frequency band supported for signal transmitting by the first cell, a precoding control indication (PCI) supported for signal transmitting by the first cell, a modulation mode supported for signal transmitting by the first cell, or a multiple-input multiple-output (MIMO) antenna mode supported for signal transmitting by the first cell; and determining, by the UE, a transmitting manner of a downlink signal of the first cell according to the obtained first attribute indication information of the first cell. By means of the present invention, a range in which UE detects first attribute indication information of an interfering cell can be reduced, and detection accuracy can be improved.
摘要:
Embodiments of the present invention provide an information transmission method, a user-side device, and a network-side device. The information transmission method provided in the embodiments of the present invention includes: sending, by the user-side device, a repetition factor to the network-side device; and sending, by the user-side device, a PRACH message part to the network-side device by using the repetition factor. In the embodiments of the present invention, resource waste may be reduced.
摘要:
The present invention discloses a resource indication method, a base station, and user equipment. The user equipment includes: a sending unit, configured to send a random access preamble to a base station on a physical random access channel (PRACH), where the PRACH corresponds to at least one acquisition indicator channel (AICH); a detection unit, configured to detect auxiliary indication information and detect, on the at least one AICH, feedback information sent by the base station, where the feedback information includes acquisition indicator (AI) information and extended acquisition indicator (EAI) information; and a determining unit, configured to determine, according to the feedback information and the auxiliary indication information, a resource index of a target resource allocated by the base station in M uplink transmission resources, where M is an integer greater than 32. In embodiments of the present invention, the auxiliary indication information is detected and the feedback information sent by the base station is detected on the acquisition indicator channel, and both the auxiliary indication information and the feedback information are used to indicate the target resource allocated to the user equipment in more than 32 sets of extended uplink transmission resources.
摘要:
The present invention relates to the field of wireless communications technologies, and in particular, to an information transmission method, apparatus, and device, so as to resolve a problem that because UE cannot correctly demodulate a MIMO signal, the UE can neither correctly receive a signal from a serving cell nor effectively cancel or suppress interference caused by a signal from a neighboring cell. The information transmission method provided in embodiments of the present invention includes: determining, by a network-side device, virtual antenna mapping (VAM) matrix information of at least one cell sending a multiple-input multiple-output (MIMO) signal, and informing user equipment (UE) of the VAM matrix information of the at least one cell. According to the embodiments of the present invention, UE may correctly demodulate a MIMO signal received from a serving cell, and may further cancel or suppress interference from a neighboring cell by demodulating a MIMO signal from the neighboring cell.
摘要:
Embodiments of the present invention relate to the communications field, and provide a channel sending method and apparatus, and a channel receiving method and apparatus. The sending method includes: separately setting a repetition quantity and a sending start time of a control channel, and a repetition quantity and a sending start time of a data channel, where the repetition quantity of the control channel is less than the repetition quantity of the data channel or the sending start time of the control channel is earlier than the sending start time of the data channel; and sending the control channel according to the repetition quantity and the sending start time of the control channel, and sending the data channel according to the repetition quantity and the sending start time of the data channel. The present invention can save transmit power and resolve a problem of a lag of data channel demodulation.