Abase station, comprising: an initial access establishment module, adapted to establish initial access to user equipment; characterized by the base station further comprising: a channel resource negotiation module, adapted to: negotiate with a second base station corresponding to a user cell to reserve, for the user equipment, a channel resource used for an access request, and send the user equipment the channel resource used for an access request; a channel quality receiving module, adapted to receive access request channel quality information reported by the second base station corresponding to the user cell, wherein the access request channel quality information is access request channel quality information obtained by performing, by the second base station corresponding to the user cell, channel quality analysis and measurement according to a received access request sent by the user equipment; a serving cell determining module, adapted to analyze and determine channel quality of the user cell according to the access request channel quality information, to select a user cell as a serving cell of the user equipment; and a data path configuration module, adapted to configure, for the user equipment, a path for data transmission to the serving cell; wherein the first base station is a base station in a macro cell, the user cell is a micro cell in the coverage of the macro cell or is selected by the macro cell according to location information of a user, and the second base station is a base station in the micro cell. an initial access establishment module, adapted to establish initial access to user equipment; characterized by the base station further comprising: a channel resource negotiation module, adapted to: negotiate with a second base station corresponding to a user cell to reserve, for the user equipment, a channel resource used for an access request, and send the user equipment the channel resource used for an access request; a channel quality receiving module, adapted to receive access request channel quality information reported by the second base station corresponding to the user cell, wherein the access request channel quality information is access request channel quality information obtained by performing, by the second base station corresponding to the user cell, channel quality analysis and measurement according to a received access request sent by the user equipment; a serving cell determining module, adapted to analyze and determine channel quality of the user cell according to the access request channel quality information, to select a user cell as a serving cell of the user equipment; and a data path configuration module, adapted to configure, for the user equipment, a path for data transmission to the serving cell; wherein the first base station is a base station in a macro cell, the user cell is a micro cell in the coverage of the macro cell or is selected by the macro cell according to location information of a user, and the second base station is a base station in the micro cell. a channel resource negotiation module, adapted to: negotiate with a second base station corresponding to a user cell to reserve, for the user equipment, a channel resource used for an access request, and send the user equipment the channel resource used for an access request; a channel quality receiving module, adapted to receive access request channel quality information reported by the second base station corresponding to the user cell, wherein the access request channel quality information is access request channel quality information obtained by performing, by the second base station corresponding to the user cell, channel quality analysis and measurement according to a received access request sent by the user equipment; a serving cell determining module, adapted to analyze and determine channel quality of the user cell according to the access request channel quality information, to select a user cell as a serving cell of the user equipment; and a data path configuration module, adapted to configure, for the user equipment, a path for data transmission to the serving cell; wherein the first base station is a base station in a macro cell, the user cell is a micro cell in the coverage of the macro cell or is selected by the macro cell according to location information of a user, and the second base station is a base station in the micro cell.