摘要:
Systems and methods are disclosed herein that relate wireless device positioning based on cell portion specific Positioning Reference Signals (PRSs) by multiple Transmit Points (TPs) in a shared cell. In some embodiments, a method of operation of a TP in a cellular communications network is provided. The TP is one of multiple of non-co-located TPs of a shared cell that has a shared cell identifier. The method of operation of the TP comprises transmitting a PRS having at least one parameter that is a function of a cell portion identifier of the TP, where the at least one parameter comprises a frequency-shift of the PRS, a portion of a system bandwidth in which the PRS is transmitted, and/or a PRS sequence used for the PRS. By transmitting cell-portion-specific PRSs, the TPs in the shared cell enable wireless device positioning based on PRSs transmitted by the non-co-located TPs.
摘要:
Systems and methods are disclosed herein that relate to transmitting and receiving a transmission when there is a collision between the transmission and reserved resource elements. In some embodiments, a radio access node for a cellular communications network is disclosed, wherein the radio access node comprises a transceiver, a processor, and memory storing instructions executable by the processor whereby the radio access node is operable to transmit, via the transceiver, a downlink transmission to a wireless device using one or more Physical Resource Blocks (PRBs) that comprise reserved Resource Elements (REs) by puncturing the downlink transmission at positions of the reserved REs. In some embodiments, the downlink transmission is an Enhanced Physical Downlink Control Channel (EPDCCH) transmission or a Physical Downlink Shared Channel (PDSCH) transmission. Further, in some embodiments, the reserved REs are REs utilized for one or more CSI-RSs.
摘要:
The present disclosure concerns radio communication. More particularly, the present disclosure inter alia introduces techniques to allow low-complexity UEs 120a-j, e.g. Rel-13 MTC devices, to operate in a legacy LTE system with maintained, or improved, performance.
摘要:
According to an aspect, a wireless terminal performs a method for a random access procedure in a wireless network. The method includes maintaining a preamble transmission attempt counter that tracks the number of random access preamble transmissions that are triggered and/or initiated in the random access procedure, including random access preamble transmissions that are aborted prior to completion of the transmission. The method also includes terminating the random access procedure in response to determining that the preamble transmission attempt counter indicates that a predetermined threshold number of transmission attempts have been made. Reports pertaining to failed preamble transmissions may be sent to the network, which then adjusts a configuration of the wireless terminal. The wireless terminal may also track time during an interval in which a preamble may be used in the random access procedure and terminate the random access procedure in response to determining that the interval has expired.
摘要:
According to some embodiments, a method of operating a wireless device in a wireless system comprises allocating a first uplink sub-channel to the wireless device in a first subframe associated with the wireless device. The first uplink sub-channel comprises a portion of an uplink system bandwidth, and portions of the uplink system bandwidth outside of the first uplink sub-channel are not available for transmission in the first subframe by the wireless device. The method further comprises determining a first sounding reference signal (SRS) sub-channel. The first SRS sub-channel comprises a portion of the first uplink sub-channel in frequency domain, and the SRS sub-channel is available for transmitting SRS in the first subframe by the wireless device.
摘要:
Embodiments described herein are directed methods and network nodes for operating a wireless device in a wireless network. The network node is configured to determine a subchannel within a system bandwidth of the wireless network. The subchannel is an off-center subchannel with respect to the system bandwidth, and the subchannel includes a plurality of consecutive subcarriers taken from one or more contiguous physical resource blocks. The network node can further map the subchannel's center frequency to a subcarrier of a physical resource block included in the subchannel, wherein the center frequency corresponds to a direct current subcarrier at a receiver associated with the wireless device. The network node can allocate the subchannel to the wireless device.
摘要:
Systems and methods enabling uplink power sharing for dual connectivity are disclosed. Embodiments are described herein in which a maximum Uplink (UL) power on each link is configured statically, semi-statically, or dynamically. In general, regardless of the embodiment, uplink power for uplink transmissions from a wireless device on two simultaneous links is controlled such that the total uplink power does not exceeds a maximum UL transmission power level while, in some embodiments, taking into account priorities of the two links and/or priorities of various uplink channels transmitted by the wireless device on the two links. Notably, while the embodiments described herein focus on dual connectivity, the embodiments described herein can easily be extended to any number of two or more simultaneous links.
摘要:
A set of resources, e.g. time and frequency resources, used for configured grants for a group of user equipments (UEs) is signalled to a second group of UEs. The second group of UEs consider the signalled set of resources to be reserved, and, therefore, avoid transmitting anything on the set of resources even if they are scheduled to do so.