Communication method and system using uplink Multiple Input Multiple Output technology

A communication method using uplink Multiple Input Multiple Output (MIMO) technology, comprising:

• receiving, by a User Equipment (UE), an indication information indicating a determined uplink data transmission mode of the UE from a network side device;
• wherein the determined uplink data transmission mode of the UE is a single-stream in a time period uplink data transmission mode or a multi-stream in a time period uplink data transmission mode as determined by the network side device;
• deciding, by the UE, an uplink data transmission mode during uplink data transmission according to the indication information received from the network side device;
• and
• performing, by the UE, the uplink data transmission to the network side device according to the decided uplink data transmission mode,
• wherein when the receiving, by the UE, comprises receiving the indication information through an absolute grant borne on an Enhanced Dedicated Channel Absolute Grant Channel (E-AGCH),
• when the indication information through the E-AGCH indicates that the uplink data transmission mode determined by a Node B as the network side device is the single-stream in the time period uplink data transmission mode,
• an E-AGCH corresponding to a data stream in multiple data streams is set to deliver an absolute grant with an absolute grant value corresponding to an index value except for 0 or 1 index values, and
• E-AGCHs corresponding to other data streams in the multiple data streams are set to respectively deliver an absolute grant with an absolute grant value corresponding to index value 0 or 1 and with an absolute grant scope corresponding to index value 0;
• or
• when the indication information through the E-AGCH indicates that the uplink data transmission mode determined by a Node B as the network side device is the multi-stream in the time period uplink data transmission mode, E-AGCHs corresponding to at least two data streams in the multiple data streams are set to respectively deliver an absolute grant with an absolute grant value corresponding to an index value except for 0 or 1 index values.

A communication system using uplink Multiple Input Multiple Output (MIMO) technology, comprising:

• a network side device communicating with a User Equipment (UE), wherein the network side device comprises:
• a determination module, configured to determine an uplink data transmission mode of a single-stream in a time period uplink data transmission mode or a multi-stream in a time period uplink data transmission mode for the UE to use for transmission of data to the network side device;
• and
• a notification module, configured to notify through a downlink channel the UE of indication information indicating the determined uplink data transmission mode of the UE,
• wherein when the network side device is a Node B and the determination module determines that the uplink data transmission mode of the UE is the single-stream in the time period uplink data transmission mode, the notification module is further configured to:
• set an Enhanced Dedicated Channel Absolute Grant Channel (E-AGCH) corresponding to a data stream in multiple data streams to deliver an absolute grant with an absolute grant value corresponding to an index value except for 0 or 1 index values, and
• set E-AGCHs corresponding to other data streams in the multiple data streams to respectively deliver an absolute grant with an absolute grant value corresponding to the index value 0 or 1 and with an absolute grant scope corresponding to index value 0 ;
• or
• wherein when the network side device is a Node B and the determination module determines that the uplink data transmission mode of the UE is the multi-stream in the time period uplink data transmission mode, the notification module is further configured to set E-AGCHs corresponding to at least two data streams in the multiple data streams to respectively deliver an absolute grant with an absolute grant value corresponding to an index value except for 0 or 1 index values.