Communication method for terminal device and network side device, and terminal device

A communication system, comprising a terminal device, a network side device, and a coordinated communication device, wherein the terminal device is configured to:

• establish a primary communication link with the network side device;
• detect one or more other terminal devices;
• determine, from the one or more other terminal devices, one or more terminal devices as one or more coordinated communication devices, wherein the one or more coordinated communication devices are determined by operations comprising:
• measuring a distance between the terminal device and each of the one or more other terminal devices;
• measuring an angle of rotation from a direction that a signal receive end of the terminal device faces to a direction toward each of the one or more other terminal devices,
• obtaining signal information of each of the one or more other terminal devices, wherein the signal information comprises a signal strength value or a signal-to-noise ratio of a signal received by the each of the one or more other terminal devices;
• and
• determining the one or more terminal devices as the one or more coordinated communication devices based on the distance, the angle, and the signal information;
• notify the network side device of information indicating that a coordinated communication device is used for coordinated communication;
• establish a device-to-device (D2D)-based virtual multiple-input multiple-output communication (MIMO) connection with the coordinated communication device, to form, between the terminal device and the network side device, a coordinated communication link relayed by the coordinated communication device;
• and
• perform parallel communication with the network side device based on the primary communication link and the coordinated communication link, or perform communication based on the coordinated communication link.

A terminal device, comprising:

• at least one processor;
• and
• at least one memory coupled to the at least one processor and storing instructions for execution by the at least one processor that enable the terminal device to perform operations comprising:
• establishing a primary communication link with a network side device;
• detecting one or more other terminal devices;
• determining, from the one or more other terminal devices, one or more terminal devices as one or more coordinated communication devices, wherein the determining one or more terminal devices as one or more coordinated communication devices comprises:
• measuring a distance between the terminal device and each of the one or more other terminal devices;
• measuring an angle of rotation from a direction that a signal receive end of the terminal device faces to a direction toward each of the one or more other terminal devices,
• obtaining signal information of each of the one or more other terminal devices, wherein the signal information comprises a signal strength value or a signal-to-noise ratio of a signal received by the each of the one or more other terminal devices;
• and
• determining the one or more terminal devices as the one or more coordinated communication devices based on the distance, the angle, and the signal information;
• notifying the network side device of information indicating that a coordinated communication device is used for coordinated communication;
• establishing a device-to-device (D2D)-based virtual multiple-input multiple-output (MIMO) communication connection with the coordinated communication device, to form, between the terminal device and the network side device, a coordinated communication link relayed by the coordinated communication device;
• and
• performing parallel communication with the network side device based on the primary communication link and the coordinated communication link, or performing communication based on the coordinated communication link.