摘要:
The present invention discloses a method in a wireless access network node for controlling a UE. The UE comprises at least two transmit antennas, and is capable of uplink transmit diversity. There is an antenna weight associated with each transmit antenna. First, the wireless access network node determines that the antenna weights of the user equipment may be controlled. Then, it creates a control signal that comprises control information and transmits it to the user equipment. The control information controls a UE autonomous selection of the antenna weights in the UE.
摘要:
Methods and devices are described whereby the UE and the Node-B are configured to align the UL CLTD status of the UE and the NodeB during serving cell change involving a new Node-B.
摘要:
A UE (115), for an HSPA WCDMA system (100), equipped with a first (111) and a second (112) transmit antenna, and arranged (15, 17) to use one or more sets of pre-coding weights for transmission. The UE (115) is arranged to receive (14) instructions from a NodeB (105) on the set or sets of pre- coding weights to be used, and to transmit (16) a first and a second pilot signal, and to use a first set of pre-coding weights for the first pilot signal and a second set of pre-coding weights for the second pilot signal, where the first set of pre-coding weights is the same as the UE (115) uses for transmitting a first data stream, and to use different spreading codes for the first data stream and for the first pilot signal.
摘要:
The disclosure relates to methods and apparatuses that facilitate power and quality control of uplink MIMO transmissions. A method in a NodeB comprises controlling (50) transmission power of multiple pilot signals transmitted by a user equipment by using a single inner power control loop operating on at least one pilot signal of the multiple pilot signals. Some disclosed embodiments also relate to adjustment (60) of a quality target applied by the single inner power control loop and to updating (71, 72) of a power offset for computing the number of bits that the user equipment can transmit on a stream that is associated with a pilot signal that is not power controlled by the single inner power control loop.
摘要:
The invention concerns a method and an antenna weight determining device (37) for improving handling of two data streams sent in downlink data communication channels to a user equipment (14) via a first and a second cell of a wireless communication network, where the antenna weight determining device comprises a unit (38) for processing data obtained in relation to communication signals sent at least between at least one of the second cells and the user equipment, and a unit (41) for determining an antenna weight to be applied by the second cell based on the processing.
摘要:
The present disclosure proposes methods for performing and controlling retransmission in a MIMO system and relevant network elements therefor. A method for performing retransmission comprises: transmitting one or more data blocks to the base station by using a first set of beams, the number of beams in the first set of beams corresponding to a first channel rank, each beam of the first set of beams being generated by using at least one of pilot channel, data channel and control channel; receiving a signal from the base station indicating erroneously received data blocks; and retransmitting the erroneously received data blocks in response to the signal.
摘要:
Embodiments herein relate to a method in a user equipment (10) for requesting access to a radio communications network (1), which user equipment (10) comprises at least two transmit antenna ports. The user equipment (10) obtains one or more random access preambles to be used to access the radio communications network. The user equipment (10) transmits; in case of obtaining one random access preamble, the one random access preamble over the at least two transmit antenna ports. In case of obtaining more than one random access preambles, the user equipment (10) transmits each random access preamble over a separate antenna port out of the at least two transmit antenna ports.