Abstract:
A method, apparatus, and system for multiplexing data for multiple wireless transmit/receive units (WTRUs) in a subframe are disclosed. A WTRU may receive a common control information message for a group of WTRUs time multiplexed in one subframe and a WTRU-specific control information message for a corresponding WTRU. The WTRU may determine whether the common control information message is directed to the WTRU based on a group WTRU identity. The WTRU may determine whether the WTRU-specific control information message is directed to the WTRU based on a WTRU-specific identity for the WTRU. The WTRU may receive a physical downlink shared channel on a WTRU-specific transmission time interval (TTI) within the subframe based on decoding common control information message with the group WTRU identity. The WTRU may decode the physical downlink shared channel using the common control information message and the WTRU-specific control information message for the WTRU.
Abstract:
Method and apparatus are disclosed for determining a physical uplink power level for transmissions on a physical uplink channel. In one embodiment, a random access channel (RACH) uplink message is transmitted. The RACH uplink message includes a RACH message power level and/or a downlink pathloss figure. A downlink message including a power offset value is received. The physical uplink power level is set for transmissions on the physical uplink channel based on the power offset value. In another embodiment, a RACH uplink message is transmitted and a downlink message including a relative power offset value is received. The physical uplink power level for transmissions on the physical uplink channel is then set based on the relative power off set value.
Abstract:
A method for reporting power headroom is disclosed. Power headroom may be reported across all carriers (wideband), for a specific carrier, or for a carrier group. The formula used to calculate the power headroom depends on whether the carrier (or a carrier in the carrier group) has a valid uplink grant. If the carrier or carrier group does not have a valid uplink grant, the power headroom may be calculated based on a reference grant. The power headroom is calculated by a wireless transmit/receive unit and is reported to an eNodeB.
Abstract:
A method and an apparatus for transmitting pilots on multiple antennas are disclosed. A wireless transmit/receive unit (WTRU) may transmit a primary dedicated physical control channel (DPCCH) and at least one secondary DPCCH via multiple antennas using different channelization codes. When a required transmit power exceeds a maximum allowed transmit power of the WTRU, power scaling may be applied equally to the primary DPCCH and the secondary DPCCH, such that a power ratio between the primary DPCCH and the secondary DPCCH remains the same before scaling as after scaling. The secondary DPCCH may include a same number of pilot bits as the primary DPCCH both in a normal mode and in a compressed mode, respectively. The same total pilot energy ratio may be maintained between the primary DPCCH and the secondary DPCCH both in a normal mode and in a compressed mode, respectively.
Abstract:
Techniques for performing inter-frequency and/or inter-radio access technology (RAT) measurements are disclosed. A multi-receiver wireless transmit/receive unit (WTRU) may receive downlink transmissions via a plurality of downlink carriers, of a set of configured downlink carriers, simultaneously. The WTRU may receive gap configuration information for at least one of the set of configured downlink carriers. The WTRU may further perform inter-frequency measurements on carriers outside of the set of configured downlink carriers during a measurement gap in response to the received gap configuration information. The WTRU may further receive information that at least one of the set of configured downlink carriers is to be disabled. The WTRU may then perform measurements on the frequency of the disabled downlink carrier without using measurement gaps. The WTRU may perform measurements on the disabled carrier without measurement gaps maintaining a status of the disabled carrier as disabled at a physical layer.
Abstract:
A method and apparatus for detecting radio link failure (RLF) in a wireless transmit receive unit (WTRU) includes the WTRU performing a series of radio link measurements during a discontinuous reception (DRX) on-duration, comparing each of the series of radio link measurements to a threshold, and determining that the series of radio link measurements indicates an out-of-synch condition.
Abstract:
A method and apparatus for detecting radio link failure (RLF) in a wireless transmit receive unit (WTRU) includes the WTRU performing a series of radio link measurements during a discontinuous reception (DRX) on-duration, comparing each of the series of radio link measurements to a threshold, and determining that the series of radio link measurements indicates an out-of-synch condition.
Abstract:
A method and apparatus for handling a control channel for carrier aggregation in wireless communications. The method includes determining which component carrier to listen to, detecting the downlink control channel, processing mapping information related to downlink and uplink transmissions and operating discontinuous reception with respect to carrier aggregation. The method also includes detecting a component carrier, determining the component carrier type and locating the anchor component carrier, if necessary, where the anchor component carrier carries the carrier aggregation information.
Abstract:
A method for active scanning in a wireless network may include two transmitters. In such a method, the following steps may take place: detecting a first probe request having a scanning target originating from a first transmitter; desiring to send a probe request to the scanning target from a second transmitter; and canceling the second probe request on a condition that the second transmitter detects the first probe request.
Abstract:
Disclosed herein are methods and systems for uplink control feedback design in relation to the high speed dedicated physical control channel (HS-DPCCH). First uplink data may be transmitted on a HS-DPCCH to a first serving cell and a second serving cell, where the first serving cell may be used as a timing reference cell for the uplink transmission. The first serving cell may be associated with a first NodeB and the second serving cell may be associated with a second NodeB. First downlink data may be received from the first serving cell and second downlink data may be received from the second serving cell. A timing reference for uplink transmission may be changed such that the second serving cell may be used as the timing reference cell. Second uplink data may be transmitted on the HS-DPCCH using the second serving cell as the timing reference cell.