IDAC Holdings, Inc. (Wilmington, DE)
Methods, systems and instruments are described to ensure reliable control signaling, for instance in New Radio (NR). A receiver in a wireless transmit/receive device (WTRU) could be able to receive one or more physical downlink channel (PDCCH) transmissions comprising downlink control information (DCI). A transmission profile can be determined by the WTRU in association with the uplink control information (UCI). The WTRU can identify one or more transmission characteristics based on the transmission profile. The UCI can be transmitted via the WTRU over a physical downlink channel (PUCCH). The UCI can be transmitted with transmission characteristics determined by the WTRU. The WTRU can transmit the UCI with at least one of three transmission characteristics such as an control resource set, an search space, or a radio network temporary identification (RNTI). Based on the UCI the WTRU might determine a distinct transmission profile.
The evolution of mobile communications by wireless technology remains a major element in mobile communication. The fifth generation, also known as next Gen (NG) wireless systems may be referred to as 5G or New Radio (NR). A prior generation of mobile communications might be, for instance the fourthgeneration (4G) or long-term evolution (LTE). A variety of applications for NR can be classified as enhanced mobile broadband (eMBB) extremely-reliable, low-latency communicationss (URLLC) or massive machine type communications. However, the current techniques for processing and transmission may not be optimal for these scenarios.
To ensure reliable control signaling, methods, systems or instruments, are discussed in New Radio (NR). A wireless transmit/receive system (WTRU) the receiver may be able to receive one or more downlink control channel (PDCCH)transmissions that contain downlink information (DCI). The WTRU may determine a profile of transmission that is associated with an uplink control information (UCI). A number of factors may determine the transmission profile that include the identity of logical channels or logical channel groups for information related to UCI and the property of at least one PDCCH transmitting. Control resource sets (CORESET) could be used to map the PDCCH transmission to one or more resources.
The transmission profile may be determined by analyzing any or all of: one or more DCI fields in the received DCI, or an identity of a bandwidth part (BWP) which is used for transmitting one or more fields of DCI or UCI.
A DCI could comprise a first and a second DCI. DCI fields may be a sign of a hybrid automated repeat request (HARQ) processing index or logical channel prioritization. The first DCI could be received by a first control resource set (CORESET), andthe second DCI can be received with another CORESET. The CORESET that is the first or second CORESET may include any of the following elements: a component-carrier that includes at least one BWP subset of resources within each bandwidth part, an array of time symbols inside a slot or mini-slot, a sub-carrier spacing in a subset of slots within a subframe, and at minimum one reference signal.
A UCI could include one and a second UCI. The initial UCI or the second UCI could comprise any one of the following: a hybrid automated repeat request (HARQ), an SR, a scheduling request (SR) or an indicator of channel quality (CQI). The UCI could be transmitted based on a CORESET, search space or the RNTI. A PDSCH or PDCCH transmission can be used to associate with the UCI. For instance one, the first UCI or the second UCI may include feedback information bits for data transmissions allocated by thefirst DCI or the second DCI. Another instance is that the second UCI could be a redundant transmission to the first UCI.
The WTRU can determine the characteristics of transmission that will be used to transmit UCI based on the transmission profile. One or more characteristics of transmission may include at least one one or morecoding parameters, one or more parameters for power transmission as well as the resource allocation parameter, or the priority level.
The WTRU could transmit the UCI over a physical uplink control channel (PUCCH). The WTRU can decide the transmission characteristics of the UCI. The WTRU can transmit the UCI using any one of the CORESET or a searchspace or a temporary identifier for radio networks. The UCI-carrying PUCCH can be transmitted through an uplink carrier (UL) or a supplementary uplink carrier (SUL).
A transmission profile may be determined through the WTRU for a PDSCH transmission, based on one or more of these factors including the length of the transmission, the bandwidth portion, or a table for control information.
The WTRU may determine a transmission profile using one or more of the following, for instance, if the UCI contains the channel state information (CSI): a value of block error rate (BLER) the target of the CSI or CSI report setting.
A WTRU can determine a transmission profile by making use of one or more of these variables. For instance it is possible that the UCI might include a scheduling request (SR) that is associated with the physical control channel (PUCCH), resource that is designed to allow transmission of the SR. Sub-carrier spacing, duration of a PUCCH, logical channels associated with SR configurations, and priority for the channel.
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