Communication method and communications device

A micro base station, wherein the micro base station comprises:

• a processor;
• and
• a transmitter;
• wherein the processor is configured to determine a first time adjustment parameter, wherein the first time adjustment parameter is determined based on a time sequence of a first subframe, and the first subframe is a transmission subframe between the micro base station and a macro base station, wherein a coverage area of the micro base station is smaller than and within a coverage area of the macro base station, and wherein the micro base station and the macro base station are connected via a backhaul link;
• and
• wherein the transmitter is configured to send the first time adjustment parameter to a micro-cell terminal located within the coverage area of the micro base station to facilitate the micro-cell terminal using the first time adjustment parameter to determine a timing of a second subframe, wherein the second subframe is a transmission subframe between the micro-cell terminal and the micro base station, and wherein the micro base station and the micro-cell terminal are connected via a micro access link;
• wherein, based on the first time adjustment parameter being sent to the micro-cell terminal, the micro base station is configured to implement space division multiplexing with respect to the backhaul link and the micro access link such that:
• a downlink transmit time of the second subframe on the backhaul link is temporally aligned with an uplink transmit time of the first subframe on the micro access link;
• or
• a downlink receive time of the first subframe on the backhaul link is temporally aligned with an uplink receive time of the second subframe on the micro access link.

A system, comprising:

• a micro base station;
• a macro base station;
• a micro-cell terminal disposed within a coverage area of the micro base station;
• and
• a macro-cell terminal disposed within a coverage area of the macro base station;
• wherein the coverage area of the micro base station is smaller than and within the coverage area of the macro base station;
• wherein the micro base station and the macro base station are connected via a backhaul link, wherein the micro-cell terminal and the micro base station are connected via a micro access link, and wherein the macro-cell terminal and the macro base station are connected via a macro access link;
• wherein the micro base station is configured to:
• determine a first time adjustment parameter based on a time sequence of a first subframe, wherein the first subframe is a transmission subframe between the micro base station and the macro base station;
• and
• send the first time adjustment parameter to the micro-cell terminal;
• wherein the micro-cell terminal is configured to use the first time adjustment parameter to determine a timing of a second subframe, wherein the second subframe is a transmission subframe between the micro-cell terminal and the micro base station;
• wherein the micro base station is configured to implement, based on the first time adjustment parameter being sent to the micro-cell terminal, space division multiplexing with respect to the backhaul link and the micro access link such that:
• a downlink transmit time of the second subframe on the backhaul link is temporally aligned with an uplink transmit time of the first subframe on the micro access link;
• or
• a downlink receive time of the first subframe on the backhaul link is temporally aligned with an uplink receive time of the second subframe on the micro access link;
• wherein the macro base station is configured to implement space division multiplexing with respect to the backhaul link and the macro access link.