Abstract: A user service mode selection method in the case of 3D beams, a pilot frequency information sending method and apparatus are disclosed. The selection method includes: comparing the total number of the users to be served with that of scheduling units; selecting a single-user service mode for each user when the total number of the users to be served is smaller than that of scheduling units; selecting J user groups meeting a preset condition to adopt a multi-user service mode when the total number of the users to be served is not smaller than that of scheduling unit, J is an integer greater than 1, and 2J is an integer not greater than the total number of the users to be served; one time-frequency resource only corresponds to one beam configured for communication in the single-user service mode but at least two beams in the multi-user service mode.

Abstract: A user service mode selection method in the case of 3D beams, a pilot frequency information sending method and apparatus are disclosed. The selection method includes: comparing the total number of the users to be served with that of scheduling units; selecting a single-user service mode for each user when the total number of the users to be served is smaller than that of scheduling units; selecting J user groups meeting a preset condition to adopt a multi-user service mode when the total number of the users to be served is not smaller than that of scheduling unit, J is an integer greater than 1, and 2J is an integer not greater than the total number of the users to be served; one time-frequency resource only corresponds to one beam configured for communication in the single-user service mode but at least two beams in the multi-user service mode.

Abstract: The disclosure provides a method and device for processing a random access preamble. The method includes: determining a Guard Time (GT) required by communication between a User Equipment (UE) and a base station according to a cell coverage radius, wherein the cell coverage radius is larger than 100 kilometers; and determining the random access preamble transmitted by the UE to the base station according to the GT, wherein the random access preamble is transmitted on an ordinary sub-frame in a radio frame during the communication between the UE and the base station. By the method and the device, the problem that the cell coverage radius of a single station cannot exceed 100 kilometers in a related technology is solved, and effects of enlarging the cell coverage radius of the single station and meeting a requirement on an ultra-large cell coverage radius in a special scenario are further achieved.

Abstract: Provided are a method and device for processing a random access preamble. The method includes: determining, according to a coverage radius of a cell, a guard time (GT) that is needed when a user equipment (UE) communicates with a base station, wherein the coverage radius of the cell is greater than 100 kilometres; and, determining, according to the GT, a random access preamble transmitted by the UE to the base station, wherein the random access preamble is transmitted on a special subframe and at least one regular subframe of a radio frame when the UE communicates with the base station. The solution solves the problem that the maximum coverage range of a single-station cell cannot satisfy a need in a special scenario, further increases the coverage radius of the single-station cell, and satisfies the need in the special scenario for an extra-large radius in cell coverage range.

Abstract: An establishment method of uplink synchronization based on the joint transmission technology utilizes channel symmetry and channel time correlation of the downlink and the uplink in TDD mobile communication system, and then applies the joint transmission technology in the uplink synchronization establishment process in a TDD mobile communication system, and based on the simple processing performed by UE, the base station can accurately detect the timing of uplink signals by performing related calculations. The present invention has fundamentally solved the problem of low probability of success in uplink synchronization establishment.

Abstract: The present invention discloses a method for uplink multi-cell joint detection in a Time Division-Synchronous Code Division Multiple Access system to realize uplink multi-cell joint detection by a Node B. The method comprises: a radio network controller sending neighbor cell channel updating information to neighbor Node Bs of a cell where a user terminal is located when a Node B application part protocol process happens at an Iub interface to establish a radio link for the user terminal; and the neighbor Node Bs adding information of the user terminal into an uplink multi-cell joint detection information of the cell where uplink joint detection is required to be performed for the user terminal after receiving the neighbor cell channel updating information. The method of the present invention realizes uplink multi-cell joint detection by a Node B.

Abstract: The present invention discloses an establishment method of uplink synchronization based on the joint transmission technology. User equipment (UE) first performs channel estimation for the downlink channel which is close to the uplink channel and determines the transmission timing of the transmission signals of uplink synchronous time slot.