Abstract: Embodiments of the present invention disclose a communications system, including: a cellular base station, a millimeter wave base station, and user equipment, where the cellular base station includes a first cellular band transceiver; the millimeter wave base station includes a second cellular band transceiver and a millimeter wave band transmitter; and the user equipment includes a third cellular band transceiver and a millimeter wave band receiver, where the third cellular band transceiver is configured to receive control plane data information sent by the first cellular band transceiver or the second cellular band transceiver by using a cellular band, and the millimeter wave band receiver is configured to receive user plane data information sent by the millimeter wave band transmitter by using a millimeter wave band. The embodiments of the present invention may reduce a cost of the user equipment.

Abstract: A method, a base station, and a user equipment for PRACH access are provided. The method includes: determining a PRACH sequence group used by multiple base stations, where the multiple base stations use a same cell identity and include a macro base station and at least one pico base station, the PRACH sequence group includes k1 first PRACH sequences, k2second PRACH sequences, k3 third PRACH sequences, k4 fourth PRACH sequences, k5 fifth PRACH sequences, and k6 sixth PRACH sequences, k1 and k4 are positive integers, and k2, k3, k5, and k6 are nonnegative integers; and sending an indication parameter of the PRACH sequence group to the UE for the UE to randomly access a network, where the indication parameter is used for indicating the first PRACH sequences to the sixth PRACH sequences. thereby the fierceness of contention access to a PRACH can be reduced.

Abstract: The present disclosure provides a method and a device for eliminating inter-system neighbor cell interference. The method includes the following steps: receiving, by a first wireless access device, a first interference indication, where the first interference indication is sent by a first terminal when the first terminal detects that neighbor cell interference caused by a second terminal to the first terminal is greater than or equal to a preset threshold, the first interference indication is used for indicating that the first terminal suffers the neighbor cell interference; sending, by the first wireless access device, a decreasing interference indication to a second wireless access device corresponding to the second terminal when determining that the first terminal suffers the neighbor cell interference from the second terminal, so that the second wireless access device executes a decreasing interference strategy to eliminate neighbor cell interference between the first terminal and the second terminal.

Abstract: Embodiments of the present invention disclose a path loss compensation method, a base station, and a user equipment to implement calculation for path loss compensation. The method in an embodiment of the present invention includes: obtaining, by a base station, power parameters of a macro site and an RRH in a cell where a UE is located; calculating, by the base station, a path loss adjustment factor for the UE according to the power parameters, where the path loss adjustment factor is an adjustment parameter used by the base station to compensate for an uplink transmit power of the UE; and sending, by the base station, the path loss adjustment factor to the UE, so that the UE can calculate the uplink transmit power according to the path loss adjustment factor.

Abstract: The present disclosure discloses a method, an AP, a server, and an STA used for coordinated transmission. The method includes: an AP receives an uplink preamble training sequence transmitted by an STA; the AP determines uplink quality information according to the uplink preamble training sequence; and the AP transmits the uplink quality information to a server, to enable the server to determine a downlink coordinated transmission set according to the uplink quality information. The method, the AP, the server, and the STA used for coordinated transmission according to embodiments of the present disclosure can realize coordinated transmission among multiple APs, and thus data throughput can be improved.

Abstract: Embodiments of the present invention provide an uplink control information feedback method, a base station, and a user equipment. The method includes: receiving uplink scheduling information of a non-independent small base station; and sending uplink control information (UCI) over a physical uplink shared channel (PUSCH) of the non-independent small base station according to the uplink scheduling information. In the embodiments of the present invention, the user equipment uses the physical uplink shared channel of the small base station to offload traffic from the physical uplink control channel (PUCCH), thereby reducing the load of the physical uplink control channel of the macro base station and reducing the collision probability.

Abstract: A user equipment generates information based on a plurality of values of joint coding of a Rank Index RI and a first Precoding Matrix Index W1 and transmits the information on a physical uplink control channel. The payload size of the information is 5 bits. The first Precoding Matrix Index W1 and a second Precoding Matrix Index W2 correspond to a precoding matrix and 16 values in the plurality of values correspond to the Rank Index RI of 1 or 2 where a part of values in the plurality of values except the 16 values in the plurality of values correspond to the Rank Index RI of more than 2.

Abstract: A user equipment receives, from the base station apparatus, bit information. The bit information indicates first information indicating one or more antenna ports and second information indicating a number of layers for downlink data symbols.

Abstract: The present invention provides a method and a coder for jointly coding Pre-coding Matrix Index #1 (W1) and Rank Index (RI) for channel state information feedback of a double codebook precoding frame. In the present invention, it is determined whether Rank Index RI is more than 2; if the RI is no more than 2, a first half branch of a coding binary tree is used to represent joint coding of the RI and W1 when RI=1 and RI=2; if the RI is more than 2, a second half branch of the coding binary tree is used to represent remaining separate codings and/or joint codings when the RI is more than 2; and processing results of the above coding steps are output. The present invention may be applied to an equal-length coding or an unequal-length coding. The present invention has advantages such as easy implementation, lower signaling overhead etc., and may be suitable for an LTE-A/4G cellular communication system and a future 5G cellular communication system.

Abstract: A method of notifying resource allocation for Demodulation Reference Signal (DMRS) is provided. A base station notifies to a user equipment a power offset value between an average EPRE value for data symbols and an average EPRE value for the DMRS at each layer in a semi-static or static manner. Also, the base station dynamically notifies to the user equipment a current channel rank or a current DMRS distribution pattern for the user equipment. The user equipment determines an allocated DMRS antenna port based on a correspondence between the received channel rank and an allocation of DMRS antenna port, thereby obtaining resource allocation information for the DMRS. The signaling overhead for power allocation in the system can be reduced, the efficiency of power amplifier can be improved and the flexibility of system scheduling can be increased. A method of notifying antenna port resource allocation for DMRS is also provided.

Abstract: A method, an eNodeB and a User Equipment for transmitting Random Access Response messages are provided. The method includes: receiving Random Access Preamble transmitted by the UE through the Random Access Channel; according to the RAP, determining whether the UE belongs to the central group or the edge group of the Random Access Area; after determining that the UE belongs to the central group of the RAA, determining the RAA which the UE belongs to; transmitting the first RAR message to the UE according to the RAP, the channel resource information of the RACH, and the RAA. By transmitting the RAR message on the basis of the RAP and the RAA, the method, eNB and UE for transmitting RAR messages enable different RAR messages to be transmitted with respect to identical Random Access requests of different RAAs.

Abstract: A method includes: sending, by a user equipment (UE), uplink test signaling to transceivers for serving the UE, so that the transceivers calculate receive power of the uplink test signaling by testing the uplink test signaling; receiving, by the UE, the receive power of the uplink test signaling and transmit power of a common reference signal (CRS) from the transceivers; receiving and testing, by the UE, the CRS sent by the transceivers to obtain receive power of the CRS; calculating, by the UE, uplink path losses on paths between the UE and the transceivers according to the receive power of the uplink test signaling, the transmit power of the CRS, and the receive power of the CRS; calculating, by the UE, an aggregate path loss according to the uplink path losses on paths between the UE and the transceivers; and calculating, by the UE, uplink transmit power according to the aggregate path loss.

Abstract: Embodiments of the present invention disclose a path loss compensation method, a base station, and a user equipment to implement calculation for path loss compensation. The method in an embodiment of the present invention includes: obtaining, by a base station, power parameters of a macro site and an RRH in a cell where a UE is located; calculating, by the base station, a path loss adjustment factor for the UE according to the power parameters, where the path loss adjustment factor is an adjustment parameter used by the base station to compensate for an uplink transmit power of the UE; and sending, by the base station, the path loss adjustment factor to the UE, so that the UE can calculate the uplink transmit power according to the path loss adjustment factor.

Abstract: The present invention discloses an information feedback method. The method comprises steps of a serving cell and/or a user equipment determining a cooperating cell set participating multi-antenna-multi-cell cooperation, the cooperating cell set including the serving cell and non-serving cells, the user equipment and/or the serving cell selecting transmit-ports of the serving cell and non-serving cells according to the determined cooperating cell set, the user equipment obtaining channel state information of the selected transmit-ports, and the user equipment feeding back identification information and the channel state information of the selected transmit-ports. The present invention provides also a serving cell, a cooperative cell and a user equipment for feeding back the identification information and channel state information of the selected transmit-ports. The present invention has advantages of simple implementation and less signaling overhead.

Abstract: A method for adaptively deciding number of feedback resource blocks in a downlink which comprises that a base station (500) determines a mode corresponding to the number of the feedback resource blocks which a user equipment feeds back by monitoring performance of a wireless cell and number of the user equipments (100) and transmits the mode to the user equipments (100) through signaling; the user equipments (100) listens to the mode and adaptively decides the number of feedback resource blocks by conditions of itself and feeds back downlink channel quality indicator information to the base station (500) according to Best channel quality indicator number or Threshold based feedback algorithm; and the base station (500) performs resource scheduling according to the feedback information.

Abstract: A method, a base station, and a user equipment for PRACH access are provided. The method includes: determining a PRACH sequence group used by multiple base stations, where the multiple base stations use a same cell identity and include a macro base station and at least one pico base station, the PRACH sequence group includes k1 first PRACH sequences, k2 second PRACH sequences, k3 third PRACH sequences, k4 fourth PRACH sequences, k5 fifth PRACH sequences, and k6 sixth PRACH sequences, k1 and k4 are positive integers, and k2, k3, k5, and k6 are nonnegative integers; and sending an indication parameter of the PRACH sequence group to the UE for the UE to randomly access a network, where the indication parameter is used for indicating the first PRACH sequences to the sixth PRACH sequences. thereby the fierceness of contention access to a PRACH can be reduced.

Abstract: The present invention provides: a method for switching an RRC state; an eNB; and a UE.

Abstract: The present invention is to enable reduction of constraint brought by generation of ID codes of reference signals to be used for cooperative reception and the allocation of the reference signals when radio communication is carried out between a plurality of base station apparatuses and a terminal unit. Terminal units UE201 to UE205 are terminal units existing in the cellular zone of a base station apparatus BS200 and are performing communication with base station apparatus UE200. When terminal unit UE201 is located at the edge of cell and its reception characteristic degrades, another base station apparatus, specifically, base station apparatus BS100 also performs cooperative transmission while terminal unit UE201 performs cooperative reception.

Abstract: A subband determining method, a base station, user equipment, and a communications system are provided. The base station of the present invention finds the subband size on the basis of a system bandwidth and divides the system bandwidth into subbands. The base station further selects some subbands to form a subband set and assign the subband set to user equipment and notifies the user equipment of information about the subband set. The user equipment in turn finds its corresponding subband size and the number of subbands for use in feedback on the basis of the size of the assigned subband set. The user equipment further divides the subband set into its corresponding subbands on the basis of a result found and feeds back information about a predetermined number of subbands to the base station. The base station carries out optimization of its transmitter on the basis of the information.

Abstract: A method of resource allocation for Channel State Information (CSI) feedback is provided, which comprises the following steps of: configuring a downlink transmission approach and a feedback mode for each User Equipment (UE); allocating feedback resources required for CSI feedback by each UE based on the configured downlink transmission approach and feedback mode, such that different types underlying different feedback modes for a single UE will not collide with each other within one sub-frame; and notifying each UE of the corresponding configured downlink transmission approach and feedback mode and allocated feedback resources.