Data transmission method, host unit, extension unit, and base station system

A data transmission method, applied to a base station system including a host unit, extension units communicatively connected to the host unit, and remote units, wherein each of the extension units is communicatively connected to at least one of the remote units, wherein the remote units are configured to communicatively connect to user equipment to enable the user equipment to access the base station system, wherein the remote units are divided into remote unit groups, and wherein each of the extension units is communicatively connected to at least one of the remote unit groups, the method comprising:

• receiving, by a target extension unit of the extension units corresponding to the user equipment, instruction information from the host unit, wherein the target extension unit is communicatively connected to a service remote unit group corresponding to the user equipment, the service remote unit group determined by the host unit according to uplink signals respectively received from the extension units, wherein the uplink signals sent by one of the extension units are used to indicate a quality state of signaling between each of the remote unit groups connected to the extension unit and the user equipment, and wherein the instruction information includes an identifier of the service remote unit group and is used to instruct the target extension unit to send uplink data of the user equipment received from the remote unit to the host unit;
• parsing, by the target extension unit, the uplink data of the user equipment from the uplink data sent by the service remote unit group according to the identifier of the service remote unit group and a time-frequency resource position corresponding to uplink scheduling information of the user equipment;
• and
• sending, by the target extension unit, the uplink data of the user equipment to the host unit.

A host unit, applied to a base station system including extension units communicatively connected to the host unit, and remote units, wherein each of the extension units are communicatively connected to at least one of the remote units, and wherein the remote units are configured to communicatively connect to user equipment to enable the user equipment to access the base station system, wherein the remote units are divided into remote unit groups, wherein each extension unit is communicatively connected to at least one of the remote unit groups, the host unit comprising:

• a first processing unit, adapted to select by the host unit, at least one remote unit group from the remote unit groups as a service remote unit group corresponding to the user equipment according to the uplink signals respectively received from the extension units, the uplink signals sent by each of the extension units used to indicate a quality state of signaling between a respective remote unit group connected to the extension unit and the user equipment, and the first processing unit, further adapted to determine by the host unit, the extension unit connected to the service remote unit group as a target extension unit;
• a first sending unit, adapted to send by the host unit instruction information to the target extension unit, the instruction information used to instruct the target extension unit to send uplink data of the user equipment received from the remote unit to the host unit;
• and
• a first receiving unit, adapted to receive by the host unit the uplink data sent by the target extension unit,
• wherein the service remote unit group comprises a first service remote unit group and a second service remote unit group, wherein the first service remote unit group is communicatively connected to a first extension unit of the extension units, wherein the second service remote unit group is communicatively connected to a second extension unit of the extension units, wherein the first extension unit is communicatively connected to the host unit, wherein the second extension unit is communicatively connected to the first extension unit, and wherein the target extension unit includes the first extension unit.

A base station system including a host unit, extension units communicatively connected to the host unit, and remote units, wherein each of the extension units is communicatively connected to at least one of the remote units, wherein the remote units are configured to communicatively connect to user equipment to enable the user equipment to access the base station system, wherein the remote units are divided into remote unit groups, and wherein each of the extension units is communicatively connected to at least one of the remote unit groups, the system comprising:

• a receiving unit, adapted to receive by a target extension unit of the extension units corresponding to the user equipment instruction information from the host unit, wherein the target extension unit is communicatively connected to a service remote unit group corresponding to the user equipment, wherein the service remote unit group is determined by the host unit according to uplink signals respectively received from the extension units, wherein the uplink signals sent by one of the extension units are used to indicate a quality state of signaling between each of the remote unit groups connected to the extension unit and the user equipment, and wherein the instruction information includes an identifier of the service remote unit group and is used to instruct the target extension unit to send uplink data of the user equipment received from the remote unit to the host unit;
• and
• a sending unit adapted to parse, by the target extension unit, the uplink data of the user equipment from the uplink data sent by the service remote unit group according to the identifier of the service remote unit group and a time-frequency resource position corresponding to uplink scheduling information of the user equipment, and the sending unit adapted to send, by the target extension unit, the uplink data of the user equipment to the host unit.