Selection method of transmission formats in uplink multi-input multi-output (MIMO) system and relevant methods and equipment

Abstract

The embodiment of the invention discloses a selection method of transmission formats in an uplink multi-input multi-output (MIMO) system and relevant methods and equipment, and the methods and equipment are used by user equipment to select the transmission formats by considering traffic interference in an ULMIMO double-current transmission mode. The method comprises the following steps that the user equipment receives the quality difference between a reference enhanced transport format combination (E-TFC) set sent by a base station and a mainstream channel in the double-current transmission mode; the transmission power of a plurality of mainstreams which is acquired according to SG that the base station distributes to the user equipment within a transmission time interval (TTI) is acquired according to the mainstream transmission power authorized by the base station, according to the sum of the quality difference of the mainstream channel, an enhanced transport format combination identifier 1 (E-TFCI1) is acquired; if the transmission power of a plurality of mainstreams is worked out according to the rest transmission power which is calculated according to the limit value of the highest transmission power of the user equipment, A'ed2 is calculated according to the rest transmission power, A'edm12 is calculated according to the quality difference of the mainstream channel and A'ed2, and E-TFCI'1 is calculated according to the reference E-TFC set and A'dem12; and one of E-TFCI1 and E-TFCI'1 with a smaller value is selected as E-TFCI''1, and the length of a transmission block which corresponds to the E-TFCI''1 is selected.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a method for selecting a transmission format in an uplink MIMO system, a related method and equipment. Background technique [0002] In Uplink Multiple Input Multiple Output (UL MIMO, Uplink Multiple Input Multiple Output), when the user equipment (UE, User Equipment) sends data at each transmission time interval (TTI, Transport Time Interval), it selects a transmission format and sends it to On the network side, the transmission format is identified by an Enhanced Dedicated Channel-Transport Format Combination Indicator (E-TFCI, Enhanced Dedicated Channel-Transport Format Combination Indicator). In one TTI, the E-TFCI corresponds to one transmission block size (Transmission Block Size). The UE transmits one data block to the base station in the same TTI, which is called single-stream transmission mode; the UE transmits two data blocks to the base station at ...

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Problems solved by technology

However, when the transmit power of the main data stream is different, the channel quality difference caused by inter-stream interference will be different, but the authorization value offset issued by this scheme is unchanged, so this scheme cannot be applied to the dual-stream transmission mode of ULMIMO Under the selection of E-TFC

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