Data transmission using precoded reference symbols from multiple subframes

A method of data transmission in a wireless communication network using a radio channel divided into subframes in the time domain, the method comprising:

• a user equipment receiving downlink control information comprising a multi-subframe assignment indicating resource elements in a first subframe and in at least one subsequent subframe, the resource elements being assigned to the user equipment;
• the user equipment receiving precoded reference symbols in at least a part of the assigned resource elements in the first subframe and at least a part of the assigned resource elements in the at least one subsequent subframe;
• and
• the user equipment receiving an explicit indication that the user equipment is allowed to assume that precoding of the reference symbols is static over the first subframe and at least one subsequent subframe.

A network system for data transmission in a wireless communication network using a radio channel divided into subframes in the time domain, the network system comprising:

• an interface for connecting to a user equipment;
• and
• at least one processing circuit configured to:
• assign resource elements in a first subframe and at least one subsequent subframe to the user equipment;
• send a multi-subframe assignment indicating the assigned resource elements to the user equipment by downlink control information transmitted in the first subframe;
• transmit precoded reference symbols to the user equipment in at least a part of the assigned resource elements in the first subframe and at least a part of the assigned resource elements in the at least one subsequent subframe;
• and
• send, to the user equipment, an explicit indication that the user equipment is allowed to assume that precoding of the reference symbols is static over the first subframe and at least one subsequent subframe.

A user equipment for data transmission in a wireless communication network using a radio channel divided into subframes in the time domain, the user equipment comprising:

• a radio interface for connecting to the wireless communication network;
• and
• at least one processing circuit configured to:
• receive downlink control information comprising a multi-subframe assignment indicating resource elements in a first subframe and in at least one subsequent subframe, the resource elements being assigned to the user equipment;
• receive precoded reference symbols in at least a part of the assigned resource elements in the first subframe and at least a part of the assigned resource elements in the at least one subsequent subframe;
• and
• receive an explicit indication that the user equipment is allowed to assume that precoding of the reference symbols is static over the first subframe and at least one subsequent subframe.

A computer program product stored in a non-transitory computer readable medium for controlling data transmission in a wireless communication network using a radio channel divided into subframes in the time domain, the computer program product comprising software instructions which, when run on one or more processing circuits of a network system, causes the network system to:

• assign resource elements in a first subframe and at least one subsequent subframe to a user equipment;
• send a multi-subframe assignment indicating the assigned resource elements to the user equipment by downlink control information transmitted in the first subframe;
• transmit precoded reference symbols to the user equipment in at least a part of the assigned resource elements in the first subframe and at least a part of the assigned resource elements in the at least one subsequent subframe;
• and
• send, to the user equipment, an explicit indication that the user equipment is allowed to assume that precoding of the reference symbols is static over the first subframe and the at least one subsequent subframe.

A computer program product stored in a non-transitory computer readable medium for controlling data transmission in a wireless communication network using a radio channel divided into subframes in the time domain, the computer program product comprising software instructions which, when run on one or more processing circuits of a user equipment, causes the user equipment to:

• receive downlink control information comprising a multi-subframe assignment indicating resource elements in a first subframe and in at least one subsequent subframe, the resource elements being assigned to the user equipment;
• receive precoded reference symbols in at least a part of the assigned resource elements in the first subframe and at least a part of the assigned resource elements in the at least one subsequent subframe;
• and
• receive an explicit indication that the user equipment is allowed to assume that precoding of the reference symbols is static over the first subframe and at least one subsequent subframe.