Repetition-based Uplink for Low-latency Communication in a Wireless Communication System for New Radio

Abstract

A method and apparatus for enabling retransmission for a low-latency system are disclosed. For example, a base station may determine whether an uplink coverage parameter for a UE to communicate with a network entity on an uplink communication channel meets an uplink coverage threshold, and based on determining that the uplink coverage parameter for the UE to communicate with the network entity on the uplink communication channel meets the uplink coverage threshold, send an activation message for retransmission-based uplink communication to the UE. In addition, the UE may receive an activation message for retransmission-based uplink communication from a network entity, and perform retransmission on the uplink communication channel for a duration indicated by one or more transmission parameters in the activation message, where the retransmission is configured based on an uplink sTTI mode.

Description

[0001] Cross - Reference to Related Applications

[0002] This application is a divisional application of the patent application with an application date of January 30, 2018, titled "Repetition - Based Uplink for Low - Latency Communications in a New Radio Wireless Communication System" and an application number of 201880009477.2.

[0003] This patent application claims the priority of U.S. Non - Provisional Application No. 15 / 796,392, titled "REPETITION - BASED UPLINK FOR LOW LATENCY COMMUNICATIONS IN A NEW RADIO WIRELESS COMMUNICATION SYSTEM", filed on October 27, 2017, and the priority of U.S. Provisional Application No. 62 / 458,395, titled "REPETITION - BASED UPLINK FOR LOW LATENCY COMMUNICATIONS IN A NEW RADIO WIRELESS COMMUNICATION SYSTEM", filed on February 13, 2017. The above - mentioned applications have been assigned to the assignee of this application and are hereby incorporated herein by reference in their entirety. Technical Field

[0004] Broadly speaking, aspects of the present disclosure relate to wireless communication networks, and more particularly, to enabling repeated transmissions on an uplink communication channel in a new radio wireless communication system. Background Art

[0005] To provide various types of communication content such as voice, video, data, messaging, broadcasting, etc., wireless communication networks have been widely deployed. These systems can be multi - access systems capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multi - access systems include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, and Single - Carrier Frequency Division Multiple Access (SC - FDMA) systems.

[0006] These multiple access techniques have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at the urban, national, regional, and even global levels. For example, the fifth-generation (5G) wireless communication technology (which may be referred to as New Radio (NR)) is envisioned to expand and support various usage scenarios and applications for the current mobile network generation. In one aspect, the 5G communication technology may include: enhanced mobile broadband, which addresses human-centric use cases for accessing multimedia content, services, and data; ultra-reliable low-latency communication (URLLC), which has certain latency and reliability specifications; and massive Internet of Things, which can allow a very large number of connected devices and transmit relatively small amounts of non-latency-sensitive information. However, as the demand for mobile broadband access continues to grow, further improvements to the NR communication technology and its subsequent generations may be required.

[0007] For example, for the NR communication technology and its subsequent generations, it is necessary to enable low-latency communication even in the case of insufficient uplink coverage. Therefore, improvements in wireless communication operations may be desirable. SUMMARY OF THE INVENTION

[0008] A brief summary of one or more aspects is presented below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all contemplated aspects and is neither intended to identify key or important elements of all aspects nor to delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a concise form as a prelude to the more detailed description that follows.

[0009] According to one aspect, a method includes enabling repeated transmission on an uplink communication channel for wireless communication. The described aspect includes: receiving, by a user equipment (UE), from a network entity an activation message for repeated-based uplink communication, the activation message including at least one or more transmission parameters indicating a duration for transmission on the uplink communication channel and an uplink shortened transmission time interval (sTTI) pattern for the transmission on the uplink communication channel. The described aspect further includes: performing, by the UE, repeated transmission on the uplink communication channel for the duration indicated by the one or more transmission parameters in the activation message (and / or configuration message), the repeated transmission being configured based on the uplink sTTI pattern.

[0010] In one aspect, an apparatus for enabling repeated transmission on an uplink communication channel for wireless communication may include: a transceiver, a memory, and at least one processor, the at least one processor coupled to the memory and configured to: receive, by a user equipment (UE), from a network entity an activation message for repeated uplink communication, the activation message including one or more transmission parameters indicating at least a duration for transmission on the uplink communication channel and an uplink shortened transmission time interval (sTTI) pattern for the transmission on the uplink communication channel. The described aspect is further for the UE to perform repeated transmission on the uplink communication channel for a duration indicated by the one or more transmission parameters in the activation message (and / or configuration message), the repeated transmission being configured based on the uplink sTTI pattern.

[0011] In one aspect, a computer-readable medium storing computer-executable code for enabling repeated transmission on an uplink communication channel for wireless communication is described. The described aspect includes: code for receiving, by a user equipment (UE), from a network entity an activation message for repeated uplink communication, the activation message including one or more transmission parameters indicating at least a duration for transmission on the uplink communication channel and an uplink shortened transmission time interval (sTTI) pattern for the transmission on the uplink communication channel. The described aspect further includes: code for performing, by the UE, repeated transmission on the uplink communication channel for a duration indicated by the one or more transmission parameters in the activation message (and / or configuration message), the repeated transmission being configured based on the uplink sTTI pattern.

[0012] In one aspect, an apparatus for enabling repeated transmission on an uplink communication channel for wireless communication is described. The described aspect includes: a unit for receiving, by a user equipment (UE), from a network entity an activation message for repeated uplink communication, the activation message including one or more transmission parameters indicating at least a duration for transmission on the uplink communication channel and an uplink shortened transmission time interval (sTTI) pattern for the transmission on the uplink communication channel. The described aspect further includes: a unit for performing, by the UE, repeated transmission on the uplink communication channel for a duration indicated by the one or more parameters in the activation message (and / or configuration message), the repeated transmission being configured based on the uplink sTTI pattern.

[0013] According to another aspect, a method includes enabling repeated transmission on an uplink communication channel for wireless communication. The described aspect includes: determining, by a network entity, whether an uplink coverage parameter for a UE to communicate with the network entity on the uplink communication channel meets an uplink coverage threshold. The described aspect further includes: based on determining that the uplink coverage parameter for the UE to communicate with the network entity on the uplink communication channel meets the uplink coverage threshold, sending, by the network entity, an activation message (and / or configuration message) for repeated uplink communication to the UE, the activation message including at least one or more transmission parameters indicating a duration of transmission on the uplink communication channel and an uplink sTTI mode of the transmission on the uplink communication channel.

[0014] In one aspect, an apparatus for enabling repeated transmission on an uplink communication channel for wireless communication may include: a transceiver, a memory, and at least one processor, the at least one processor coupled to the memory and configured to: determine, by a network entity, whether an uplink coverage parameter for a UE to communicate with the network entity on the uplink communication channel meets an uplink coverage threshold. The described aspect further includes: based on determining that the uplink coverage parameter for the UE to communicate with the network entity on the uplink communication channel meets the uplink coverage threshold, sending, by the network entity, an activation message (and / or configuration message) for repeated uplink communication to the UE, the activation message including at least one or more transmission parameters indicating a duration of transmission on the uplink communication channel and an uplink sTTI mode of the transmission on the uplink communication channel.

[0015] In one aspect, a computer-readable medium storing computer-executable code for enabling repeated transmission on an uplink communication channel for wireless communication is described. The described aspect includes: code for determining, by a network entity, whether an uplink coverage parameter for a UE to communicate with the network entity on the uplink communication channel meets an uplink coverage threshold. The described aspect further includes: code for sending, by the network entity, an activation message (and / or configuration message) for repeated uplink communication to the UE based on determining that the uplink coverage parameter for the UE to communicate with the network entity on the uplink communication channel meets the uplink coverage threshold, the activation message including at least one or more transmission parameters indicating a duration of transmission on the uplink communication channel and an uplink sTTI mode of the transmission on the uplink communication channel.

[0016] In one aspect, an apparatus for enabling repeated transmission on an uplink communication channel for wireless communication is described. The described aspect includes: a unit for a network entity to determine whether an uplink coverage parameter for a UE to communicate with the network entity on the uplink communication channel meets an uplink coverage threshold. The described aspect further includes: a unit for the network entity to send an activation message (and / or a configuration message) for repeated uplink communication to the UE based on determining that the uplink coverage parameter for the UE to communicate with the network entity on the uplink communication channel meets the uplink coverage threshold, the activation message including at least one or more transmission parameters indicating at least the duration of transmission on the uplink communication channel and the uplink sTTI mode of the transmission on the uplink communication channel.

[0017] To achieve the foregoing and related purposes, one or more aspects include the features that are fully described hereinafter and particularly pointed out in the claims. The following description and the drawings set forth in detail certain illustrative features of one or more aspects. However, these features are only some of the various ways in which the principles of the various aspects can be employed, and the description is intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The aspects disclosed hereinafter will be described in conjunction with the accompanying drawings, which are provided for illustration and not limitation of the disclosed aspects, and in which like reference numerals represent like elements, and in which:

[0019] Figure 1 is a schematic diagram of an example of a wireless communication network including at least one base station and at least one user equipment (UE), the at least one base station including a repeated uplink component configured to send an activation message to enable repeated transmission on an uplink communication channel, the at least one UE having a repeated uplink component configured to receive the activation message and perform repeated transmission on the uplink communication channel;

[0020] Figure 2 is a flowchart of an exemplary wireless communication process between a UE and a base station;

[0021] Figure 3 is a flowchart of an example of a method of wireless communication at a UE;

[0022] Figure 4 is a flowchart of an example of a method of wireless communication at a network entity;

[0023] Figure 5 is Figure 1Schematic diagram of exemplary components of a UE therein; and

[0024] Figure 6 is Figure 1 Schematic diagram of exemplary components of a base station therein. Detailed Description

[0025] Aspects will now be described with reference to the accompanying drawings. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more aspects. However, it may be apparent that the aspects may be practiced without these specific details. Additionally, the term "component" as used herein may be one of the components that make up a system, may be hardware, firmware, and / or software stored on a computer-readable medium, and may be divided into other components.

[0026] The present disclosure generally relates to communicating in a wireless network according to an uplink frame structure of a low-latency wireless communication technology, the low-latency wireless communication technology being based on a shortened transmission time interval (sTTI) that has a duration smaller than that of traditional wireless communication technologies. For example, in a low-latency LTE system such as a URLLC system, the downlink and uplink sTTI lengths are configured to be 2 symbols or 1 time slot. Additionally, in a 2-symbol sTTI configuration, the uplink coverage between a UE and a network may be insufficient to successfully receive control information or data information.

[0027] To accommodate the insufficient coverage to successfully receive information, a UE may be configured to use an uplink TTI that is longer than the downlink TTI. For example, in such a system, when a 2-symbol sTTI is used for downlink communication, the UE may use a 1-time slot sTTI for uplink communication. In another example, when a 2-symbol sTTI is used for downlink communication, the UE may use a 1 ms TTI for uplink communication.

[0028] However, in some aspects, when an uplink coverage problem is detected, the network may not reconfigure the TTI for uplink communication. Additionally, for example, the network may desire to maintain the downlink and uplink sTTI lengths as 2 symbols and / or 1 time slot for a low-latency system. Thus, to effectively utilize the uplink sTTI length for uplink communication, the network may enable repetition-based uplink communication with the UE in a new radio environment.

[0029] Specifically, in one aspect, aspects of the present disclosure may be capable of using multiple consecutive 2-symbol sTTIs to send information on an uplink communication channel. For example, the network may determine whether uplink coverage parameters for a UE to communicate with a network entity on an uplink communication channel meet an uplink coverage threshold. Additionally, aspects of the present disclosure may include: based on determining that the uplink coverage parameters for a UE to communicate with a network entity on an uplink communication channel meet the uplink coverage threshold, sending, by a network entity, an activation message (and / or a configuration message) for repeated uplink communication to the UE.

[0030] Furthermore, aspects of the present disclosure include: receiving, by a UE, from a network entity an activation message for repeated uplink communication, the activation message including one or more transmission parameters. Additionally, aspects of the present disclosure include: performing, by the UE, repeated transmissions on an uplink communication channel for a duration indicated by one or more parameters in the activation message, the repeated transmissions being configured based on an uplink sTTI pattern.

[0031] Reference is now made to Figures 1-6 to describe additional features of aspects of the present disclosure in more detail.

[0032] Note that the techniques described herein can be used in various wireless communication networks such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and other systems. The terms "system" and "network" are often used interchangeably. CDMA systems may implement wireless technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), etc. CDMA2000 covers the IS-2000, IS-95, and IS-856 standards. Release 0 and A of IS-2000 are commonly referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD), etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. TDMA systems may implement wireless technologies such as Global System for Mobile Communications (GSM). OFDMA systems may implement wireless technologies such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM™, etc. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are new versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in the literature from an organization named "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in the literature from an organization named "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein can be used in the systems and wireless technologies mentioned above and other systems and wireless technologies, including cellular (e.g., LTE) communication over a shared radio frequency band. However, for purposes of illustration, the following description describes the LTE / LTE-A system and uses the LTE terminology in most of the following description, but these techniques are applicable beyond LTE / LTE-A applications (e.g., applicable to 5G networks or other next-generation communication systems).

[0033] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made to the functionality and arrangement of the elements discussed without departing from the scope of the present disclosure. Various examples may appropriately omit, substitute, or add various processes or components. For example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with respect to some examples may be combined in other examples.

[0034] Reference Figure 1, in accordance with aspects of the present disclosure, an exemplary wireless communication network 100 includes at least one UE 110 having a modem 140, the modem 140 having a repetition-based uplink component 150 that performs repetition-based uplink communication with a network entity. Additionally, the wireless communication network 100 includes at least one base station 105 having a modem 160, the modem 160 having a repetition-based determination component 170 that is capable of enabling a repeated transmission 152 on an uplink communication channel (e.g., communication link 135). Thus, in accordance with the present disclosure, the base station 105 can send an activation message 172 to the UE 110 to enable the repeated transmission 152 in order to overcome insufficient uplink coverage issues. For example, the repeated transmission 152 can correspond to sending a packet multiple times (e.g., when the UE 110 is in a poor coverage area). In another example, the repeated transmission 152 can correspond to sending multiple packets in multiple sTTIs.

[0035] In one aspect, the repetition-based determination component 170 can be configured to send a configuration message indicating the ability for repetition-based uplink communication with the UE 110. For example, the configuration message can include one or more configuration parameters that at least indicate the duration of transmission on the uplink communication channel (e.g., communication link 135) and the uplink sTTI pattern for transmission on the uplink communication channel. The duration of transmission can correspond to the number of sTTIs to be used when enabling the repeated transmission. In one example, the configuration message is included in a radio resource control (RRC) message or a medium access control (MAC) control element (CE).

[0036] In one aspect, the repetition-based uplink component 150 can be configured to receive a configuration message indicating the ability for repetition-based uplink communication with the base station 105.

[0037] In one aspect, the repetition-based determination component 170 can be configured to determine uplink coverage parameters for the UE 110 to communicate with the base station 105 on the uplink communication channel that satisfy an uplink coverage threshold. For example, during the communication process between the UE 110 and the base station 105, the base station 105 can continuously monitor the uplink coverage of the UE 110 in order to determine whether to activate / enable the repeated transmission on the uplink communication channel of the communication link 135.

[0038] In one aspect, the determination component 170 based on repetition may be configured to maintain the current network communication configuration with the UE 110 based on determining that the uplink coverage parameter for the UE 110 to communicate with the base station 105 on the uplink communication channel does not meet the uplink coverage threshold.

[0039] In one aspect, the determination component 170 based on repetition may be configured to send an activation message 172 for repetition-based uplink communication to the UE 110 based on determining that the uplink coverage parameter for the UE 110 to communicate with the base station 105 on the uplink communication channel meets the uplink coverage threshold. For example, similar to the configuration message, the activation message 172 may include one or more transmission parameters 174, and the one or more transmission parameters 174 at least indicate the duration for transmission on the uplink communication channel and the uplink sTTI mode for transmission on the uplink communication channel. The uplink sTTI mode (or layout) may include several different uplink sTTI modes to implement 2-symbol sTTI operation, such as but not limited to uplink sTTI mode [3, 2, 2, 2, 2, 3] and / or [2, 2, 3, 2, 2, 3]. In these examples, the square brackets correspond to subframes with 2 time slots (e.g., for [3, 2, 2, 2, 2, 3], symbols 3, 2, 2 are in the first time slot of the subframe, and symbols 2, 2, 3 are in the second time slot of the subframe). In one example, this layout is known to the UE 110 as negotiated during the Radio Access Network 1 (RAN1). In addition, if the uplink communication channel is based on IFDMA, the number of combinations of uplink sTTI modes and the combination of uplink sTTI modes assigned to the UE 110 may also be indicated.

[0040] In one aspect, the activation message 172 may be sent in various ways. For example, the activation message is included in a Medium Access Control (MAC) Control Element (CE) or a Downlink Control Information (DCI) message. In some examples, the activation message 172 is included in a grant message, and the activation message 172 includes an indication of the number of repeated transmissions to be performed. The grant may correspond to a grant for a Short Physical Uplink Shared Channel (sPUSCH).

[0041] In one aspect, the repetition-based uplink component 150 may be configured to receive the activation message 172 for repetition-based uplink communication from the base station 105. In another aspect, the repetition-based uplink component 150 may be configured to perform repeated transmissions 152 on the uplink communication channel for a duration indicated by one or more transmission parameters 174 in the activation message 172. For example, the repeated transmissions 152 are configured based on the uplink sTTI mode.

[0042] In one aspect, based on the timing of the activation message 172 and one or more transmission parameters 174 (e.g., the duration for transmission on an uplink communication channel), the repetition-based uplink component 150 may be configured to perform a repetition transmission 152 for an uplink sTTI spanning a subframe boundary (e.g., between two or more subframes), e.g., perform the repetition transmission 152 on multiple uplink sTTIs located in two or more subframes. In this example, due to many factors, coherent uplink channel estimation may not be possible. For example, the transmit power control (TPC) may change between subframe boundaries. Thus, it may be necessary to send a sounding reference signal (SRS) on the last symbol of a subframe. As a result, phase continuity problems occur across different demodulation reference signals (DMRS) and / or data symbols in two different subframes.

[0043] To compensate for the possible phase continuity problems, the repetition-based uplink component 150 may be configured to perform the repetition transmission 152 in multiple ways. For example, the repetition-based uplink component 150 may be configured to perform the repetition transmission 152 only within a subframe. In this example, the start and end points of the uplink transmission occur within the subframe.

[0044] In another example, the repetition-based uplink component 150 may be configured to maintain a phase continuity parameter across one or more subframes for a duration indicated by one or more transmission parameters 174 in the activation message 172. In this example, the UE 110 and the base station 105 may be configured to ensure that the TPC does not change across subframe boundaries and that no SRS is sent. In some instances, if the TPC is received or if the SRS is requested, both should be postponed until after the repetition transmission 152 is performed. As a result, the base station 105 will be able to coherently combine the received repetition transmissions 152 from all subframes as long as the TPC remains unchanged across the sTTIs within a subframe.

[0045] In another example, the repetition-based uplink component 150 may be configured to send DMRS within each of two or more subframes for a duration indicated by one or more transmission parameters 174 in the activation message 172. In this example, channel estimation may occur separately for sTTIs within different subframes, and thus, the repetition-based uplink component 150 sends DMRS within each subframe.

[0046] In one aspect, the repetition-based uplink component 150 may be configured to determine, on a case-by-case basis, a transmission scheme for coherent / non-coherent communication. For example, the repetition-based uplink component 150 may determine whether the repeated transmission 152 spans multiple subframes and whether the UE 110 is required to transmit other physical channels / signals (e.g., SRS) during the repeated transmission 152. If so, the repetition-based uplink component 150 assumes non-coherent reception, and thus, the UE 110 may not be required to maintain phase continuity across subframes. As described above, the repetition-based uplink component 150 may transmit DMRS within each of two or more subframes for a duration indicated by one or more transmission parameters 174 in the activation message 172.

[0047] In one aspect, since multiple sTTIs are used during the duration of the repeated transmission 152, the uplink sTTI pattern is configured for the duration of the repeated transmission 152. For example, if the duration corresponds to three sTTIs and the repeated transmission 152 occurs across subframes, the last two sTTIs of the first subframe and the first sTTI of the second subframe are configured. For example, if coherent reception is assumed, the first sTTI is [R, D], the second sTTI is [R, D, D], and the last sTTI is [D, D], where R corresponds to a reserved symbol (e.g., DMRS) and D corresponds to data information. Thus, the indicated uplink sTTI pattern is [R, D, R, D, D, D, D]. If non-coherent reception is configured, the uplink sTTI pattern may be [R, D, R, D, X, R, D], where X is used for SRS transmission. The last sTTI may have DMRS symbols to enable channel estimation. However, as described above, multiple uplink sTTI patterns may be defined and indicated from the base station 105 to the UE 110. In some aspects, a fixed uplink sTTI pattern may be defined for each set of starting sTTI and duration. In this way, the UE 110 will implicitly know which uplink sTTI patterns should be used.

[0048] The wireless communication network 100 may include one or more base stations 105, one or more UEs 110, and a core network 115. The core network 115 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The base station 105 may interface with the core network 115 via a backhaul link 120 (e.g., S1, etc.). The base station 105 may perform wireless configuration and scheduling for communicating with the UE 110, or may operate under the control of a base station controller (not shown). In various examples, the base stations 105 may communicate with each other directly or indirectly (e.g., via the core network 115) over a backhaul link 125 (e.g., X1, etc.), which may be a wired or wireless communication link.

[0049] The base station 105 may communicate wirelessly with the UE 110 via one or more base station antennas. Each base station 105 may provide communication coverage for a corresponding geographic coverage area 130. In some examples, the base station 105 may be referred to as a base transceiver station, radio base station, access point, access node, radio transceiver, NodeB, eNodeB (eNB), gNodeB (gNB), home node B, home eNodeB, repeater, or some other suitable term. The geographic coverage area 130 of the base station 105 may be divided into sectors or cells (not shown) that only form a part of the coverage area. The wireless communication network 100 may include different types of base stations 105 (e.g., macro base stations or small cell base stations described below). Additionally, multiple base stations 105 may operate according to different communication technologies among a variety of communication technologies (e.g., 5G (New Radio or “NR”), Fourth Generation (4G) / LTE, 3G, Wi-Fi, Bluetooth, etc.), and thus, there may be overlapping geographic coverage areas 130 for different communication technologies.

[0050] In some examples, the wireless communication network 100 may be or include one or any combination of communication technologies, including New Radio (NR) or 5G technology, Long Term Evolution (LTE) or Advanced LTE (LTE-A) or MuLTEfire technology, Wi-Fi technology, Bluetooth technology, or any other long-range or short-range wireless communication technology. In an LTE / LTE-A / MuLTEfire network, the term evolved Node B (eNB) may generally be used to describe the base station 105, and the term UE may generally be used to describe the UE 110. The wireless communication network 100 may be a heterogeneous technology network where different types of eNBs provide coverage for various geographical areas. For example, each eNB or base station 105 may provide communication coverage for a macro cell, a small cell, or other types of cells. Depending on the context, the term "cell" is a 3GPP term that may be used to describe a base station, a carrier or component carrier associated with the base station, or the coverage area of the carrier or base station (e.g., a sector, etc.).

[0051] A macro cell may generally cover a relatively large geographical area (e.g., with a radius of several kilometers) and may allow unrestricted access by UEs 110 having a service subscription with the network provider.

[0052] Compared to a macro cell, a small cell may include a base station with relatively low transmit power, which may operate in the same or different frequency bands (e.g., licensed, unlicensed, etc.) as the macro cell. According to various examples, small cells may include pico cells, femto cells, and micro cells. For example, a pico cell may cover a small geographical area and may allow unrestricted access by UEs 110 having a service subscription with the network provider. A femto cell may also cover a small geographical area (e.g., a home) and may provide restricted access and / or unrestricted access by UEs 110 associated with the femto cell (e.g., in the case of restricted access, the UE 110 is in a Closed Subscriber Group (CSG) of the base station 105, which may include UEs 110 for users in the home, etc.). A micro cell may cover a geographical area larger than that of a pico cell and a femto cell but smaller than that of a macro cell. The eNB for a macro cell may be referred to as a macro eNB. The eNB for a small cell may be referred to as a small cell eNB, a pico eNB, a femto eNB, or a home eNB. An eNB may support one or more (e.g., two, three, four, etc.) cells (e.g., component carriers).

[0053] A communication network that can accommodate some of the disclosed examples can be a packet-based network operating according to a hierarchical protocol stack, and the data in the user plane can be IP-based. The user plane protocol stack (e.g., Packet Data Convergence Protocol (PDCP), Radio Link Control (RLC), MAC, etc.) can perform packet segmentation and reassembly for communication over logical channels. For example, the MAC layer can perform prioritization and multiplexing of logical channels to transport channels. The MAC layer can also use Hybrid Automatic Repeat / Request (HARQ) to provide retransmissions at the MAC layer to improve link efficiency. In the control plane, the RRC protocol layer can provide the establishment, configuration, and maintenance of the RRC connection between the UE 110 and the base station 105. The RRC protocol layer can also be used to support core network 115 support for radio bearers for user plane data. At the Physical (PHY) layer, transport channels can be mapped to physical channels.

[0054] UE 110 can be scattered throughout the wireless communication network 100, and each UE 110 can be stationary or mobile. UE 110 can also include or be referred to by those skilled in the art as: mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handheld device, user agent, mobile client, client, or some other suitable term. UE 110 can be a cellular phone, smartphone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, tablet computer, laptop computer, cordless phone, smartwatch, wireless local loop (WLL) station, entertainment device, vehicle component, customer premise equipment (CPE), or any device capable of communicating in the wireless communication network 100. Additionally, UE 110 can be an Internet of Things (IoT) and / or machine-to-machine (M2M) type of device, e.g., a low-power, low-data rate (relative to, e.g., a wireless phone) type of device, which in some aspects can communicate infrequently with the wireless communication network 100 or other UEs. UE 110 is capable of communicating with various types of base stations 105 and network devices, including macro eNBs, small cell eNBs, macro gNBs, small cell gNBs, relay base stations, etc.

[0055] UE 110 may be configured to establish one or more wireless communication links 135 with one or more base stations 105. The wireless communication links 135 shown in the wireless communication network 100 may carry uplink (UL) transmissions from the UE 110 to the base station 105 or carry downlink (DL) transmissions from the base station 105 to the UE 110. Downlink transmissions may also be referred to as forward link transmissions, and uplink transmissions may also be referred to as reverse link transmissions. Each wireless communication link 135 may include one or more carriers, where each carrier may be a signal composed of multiple subcarriers (e.g., waveform signals of different frequencies) modulated according to the various wireless technologies described above. Each modulated signal may be transmitted on a different subcarrier and may carry control information (e.g., reference signals, control channels, etc.), overhead information, user data, etc. In one aspect, the wireless communication link 135 may operate using frequency division duplexing (FDD) (e.g., using paired spectrum resources) or time division duplexing (TDD) (e.g., using unpaired spectrum resources) to send two-way communications. Frame structures may be defined for FDD (e.g., frame structure type 1) and TDD (e.g., frame structure type 2). Additionally, in some aspects, the wireless communication link 135 may represent one or more broadcast channels.

[0056] In some aspects of the wireless communication network 100, the base station 105 or the UE 110 may include multiple antennas for adopting an antenna diversity scheme to improve the communication quality and reliability between the base station 105 and the UE 110. Additionally or alternatively, the base station 105 or the UE 110 may adopt multiple-input multiple-output (MIMO) technology, which may utilize the multipath environment to transmit multiple spatial layers carrying the same or different coded data.

[0057] The wireless communication network 100 can support the operation of multiple cells or carriers, which is a feature that can be referred to as carrier aggregation (CA) or multi-carrier operation. A carrier can also be referred to as a component carrier (CC), layer, channel, etc. The terms "carrier", "component carrier", "cell", and "channel" may be used interchangeably herein. The UE 110 can be configured with multiple downlink CCs and one or more uplink CCs for carrier aggregation. Carrier aggregation can be used with both FDD and TDD component carriers. The base station 105 and the UE 110 can use a spectrum with a bandwidth of up to Y MHz per carrier (e.g., Y = 5, 10, 15, or 20 MHz) allocated in carrier aggregation for transmission in each direction, and the carrier aggregation has a total of up to Yx MHz (x = the number of component carriers). The carriers may or may not be adjacent to each other. The allocation of carriers can be asymmetric with respect to DL and UL (e.g., more or fewer carriers can be allocated for DL than for UL). The component carriers can include a primary component carrier and one or more secondary component carriers. The primary component carrier can be referred to as the primary cell (PCell), and the secondary component carriers can be referred to as secondary cells (SCells).

[0058] The wireless communication network 100 can also include a base station 105 operating according to Wi-Fi technology, which communicates with a UE 110 operating according to Wi-Fi technology via a communication link in an unlicensed spectrum (e.g., 5 GHz). The base station 105 is, for example, a Wi-Fi access point, and the UE 110 is, for example, a Wi-Fi station (STA). When communicating in an unlicensed spectrum, the STA and the AP can perform an idle channel assessment (CCA) or a listen-before-talk (LBT) process before communication to determine whether the channel is available.

[0059] In addition, one or more of the base station 105 and / or the UE 110 can operate according to NR or 5G technology, which is referred to as millimeter wave (mmW or mmwave) technology. For example, mmW technology includes transmissions at mmW frequencies and / or near mmW frequencies. The extremely high frequency (EHF) is a part of the radio frequency (RF) in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength of 1 mm to 10 mm. The radio waves in this frequency band can be referred to as millimeter waves. Near mmW can extend down to a frequency of 3 GHz with a wavelength of 100 mm. For example, the super high frequency (SHF) band extends between 3 GHz and 30 GHz and can also be referred to as centimeter waves. Communications using mmW and / or near mmW radio frequency bands have extremely high path loss and short distances. Thus, the base station 105 and / or the UE 110 operating according to mmW technology can utilize beamforming in their transmissions to compensate for the extremely high path loss and short distances.

[0060] Figure 2 A flow chart of an exemplary wireless communication process 200 between a UE and a base station is depicted. For example, the UE and the base station may correspond to a location such as Figure 1 UE 110 and base station 105 in the wireless communication network 100 are shown. UE 110 may include a modem 140 having a repetition-based uplink component 150 that performs repetition-based uplink communication with a network entity. In addition, base station 105 may include a modem 160 having a repetition-based determination component 170 that enables repetition transmission 152 on an uplink communication channel (e.g., communication link 135).

[0061] In one aspect, the base station 105 and / or the repetition-based determination component 170 may optionally send a configuration message 202 to the UE 110 indicating a capability for repetition-based uplink communication. For example, the configuration message 202 may include one or more configuration parameters indicating at least a duration for transmission on an uplink communication channel and an uplink sTTI mode for transmission on the uplink communication channel 135. In one example, the resources used for uplink transmissions (e.g., frequency-domain radio bearers RBs for each transmission) may include a redundancy version (RV) index for each transmission. In addition, a modulation and coding scheme (MCS) is determined by the RV index for each transmission.

[0062] In one aspect, at 204, the base station 105 and / or the repetition-based determination component 170 can determine whether to enable repeated transmissions 152. For example, when transmitting the configuration message 202, the base station 105 can perform the repetition-based determination component 170 to determine whether uplink coverage parameters for the UE 110 to communicate with a network entity (e.g., the base station 105) on an uplink communication channel (e.g., the communication link 135) satisfy an uplink coverage threshold.

[0063] In one aspect, the base station 105 and / or the repetition-based determination component 170 may send an activation message 172 for repetition-based uplink communication to the UE 110 based on determining that uplink coverage parameters for the UE 110 to communicate with a network entity (e.g., the base station 105) on an uplink communication channel (e.g., the communication link 135) satisfy an uplink coverage threshold. For example, the activation message 172 may include one or more transmission parameters 174 indicating at least a duration for transmission on the uplink communication channel and an uplink sTTI pattern for transmission on the uplink communication channel.

[0064] In one aspect, at 206, the UE 110 and / or the repetition-based uplink component 150 may analyze transmission parameters 174 before performing the repeated transmission 152. For example, the UE 110 may execute the repetition-based uplink component 150 to identify the duration for transmission on the uplink communication channel and the uplink sTTI pattern for transmission on the uplink communication channel. In this way, the UE 110 and / or the repetition-based uplink component 150 may adjust / configure the repeated transmission 152 based on these one or more transmission parameters 174.

[0065] In one aspect, at 208, the UE 110 and / or the repetition-based uplink component 150 may perform the repeated transmission 152 on the uplink communication channel for a duration indicated by one or more transmission parameters 174 in the activation message 172. For example, the repeated transmission 152 may include a first repeated transmission 210, a second repeated transmission 212, and an Nth repeated transmission 214, where N corresponds to an integer greater than 2, and the repeated transmission 152 is configured based on the uplink sTTI pattern. In this way, the repeated transmission 152 can effectively utilize the uplink sTTI length for uplink communication.

[0066] Reference Figure 3 , for example, a wireless communication method 300 for operating the UE 110 according to the above aspect to perform repetition-based uplink communication with a network entity includes one or more actions defined herein. The blocks shown with dashed lines may be optional.

[0067] At block 302, the method 300 may receive, by the UE, a configuration message indicating the capabilities for repetition-based uplink communication with a network entity, the configuration message including one or more configuration parameters. For example, the UE 110 and / or the repetition-based uplink component 150 may execute the transceiver 502 ( Figure 5 ), to receive a configuration message indicating the capabilities for repetition-based uplink communication with a network entity (e.g., the base station 105), the configuration message including one or more configuration parameters.

[0068] At block 304, the method 300 may receive, by the UE, an activation message for repetition-based uplink communication from the network entity, the activation message including at least one or more transmission parameters indicating the duration for transmission on the uplink communication channel and the uplink shortened transmission time interval (sTTI) pattern for transmission on the uplink communication channel. For example, the UE 110 and / or the repetition-based uplink component 150 may execute the transceiver 502 ( Figure 5) to receive, from a network entity (e.g., base station 105), an activation message 172 for repeated uplink communication, the activation message 172 including one or more transmission parameters 174 indicating a duration for transmission on an uplink communication channel (e.g., communication link 135) and an uplink sTTI pattern for transmission on the uplink communication channel.

[0069] At block 306, method 300 may perform, by the UE, repeated transmissions on the uplink communication channel for the duration indicated by the one or more parameters in the activation message, the repeated transmissions being configured based on the uplink sTTI pattern. For example, UE 110 and / or the repeated uplink component 150 may perform transceiver 502 to perform repeated transmissions 152 on an uplink communication channel (e.g., communication link 135) for the duration indicated by one or more parameters 174 in activation message 172, the repeated transmissions 152 being configured based on the uplink sTTI pattern.

[0070] Referring Figure 4 , for example, a method 400 of wireless communication for operating a network entity such as base station 105 (e.g., gNodeB) according to the above aspects to enable repeated uplink communication with a UE in a new radio environment includes one or more actions defined herein. Blocks shown with dashed lines may be optional.

[0071] At block 402, method 400 may send, by the network entity, a configuration message indicating a capability for repeated uplink communication with the UE, the configuration message including one or more configuration parameters. For example, in one aspect, base station 105 and / or the repeated determination component 170 perform transceiver 602 ( Figure 6 ) to send a configuration message indicating a capability for repeated uplink communication with UE 110, the configuration message including one or more configuration parameters.

[0072] At block 404, method 400 may determine, by the network entity, whether an uplink coverage parameter for the UE to communicate with the network entity on an uplink communication channel satisfies an uplink coverage threshold. For example, in one aspect, base station 105 may perform the repeated determination component 170 to determine whether an uplink coverage parameter for UE 110 to communicate with the network entity (e.g., base station 105) on an uplink communication channel (e.g., communication link 135) satisfies the uplink coverage threshold.

[0073] At block 406, method 400 may send, by the network entity, an activation message for repeated uplink communication to the UE based on determining that the uplink coverage parameter for the UE to communicate with the network entity on the uplink communication channel satisfies the uplink coverage threshold, where the activation message includes at least one or more transmission parameters indicating at least the duration of transmission on the uplink communication channel and the shortened transmission time interval (sTTI) pattern for transmission on the uplink communication channel. For example, in one aspect, base station 105 and / or the repeated determination component 170 may execute transceiver 602( Figure 6 ) to send, to UE 110, an activation message 172 for repeated uplink communication based on determining that the uplink coverage parameter for UE 110 to communicate with a network entity (e.g., base station 105) on an uplink communication channel (e.g., communication link 135) satisfies the uplink coverage threshold, where the activation message 172 includes at least one or more transmission parameters 174 indicating at least the duration of transmission on the uplink communication channel and the uplink sTTI pattern for transmission on the uplink communication channel.

[0074] At block 408, method 400 may maintain the current network communication configuration with the UE based on determining that the uplink coverage parameter for the UE to communicate with the network entity on the uplink communication channel does not satisfy the uplink coverage threshold. For example, in one aspect, base station 105 and / or the repeated determination component 170 may execute transceiver 602( Figure 6 ) to maintain the current network communication configuration with UE 110 based on determining that the uplink coverage parameter for UE 110 to communicate with a network entity (e.g., base station 105) on an uplink communication channel (e.g., communication link 135) does not satisfy the uplink coverage threshold.

[0075] Referring Figure 5 , an example implementation of UE 110 may include various components, some of which have been described above, but including components such as one or more processors 512 and a memory 516 that communicate via one or more buses 544, and a transceiver 502, where the components may operate with a modem 140 and a repeated uplink component 150 to enable one or more functions related to performing repeated uplink communication with a network entity as described herein. Additionally, one or more processors 512, modem 140, memory 516, transceiver 502, radio frequency (RF) front end 588, and one or more antennas 565 may be configured to support voice and / or data calls (simultaneously or non-simultaneously) in one or more radio access technologies. In some aspects, the modem 140 may communicate with the modem 140(Figure 1 ) are the same or similar.

[0076] In one aspect, one or more processors 512 may include a modem 140 that uses one or more modem processors. Various functions related to the repetition-based uplink component 150 may be included in the modem 140 and / or the processor 512, and in one aspect, various functions may be performed by a single processor, while in other aspects, different functions may be performed by a combination of two or more different processors. For example, in one aspect, one or more processors 512 may include any one or any combination of a modem processor associated with the transceiver 502, or a baseband processor, or a digital signal processor, or a transmit processor, or a receive processor, or a transceiver processor. In other aspects, some features of one or more processors 512 and / or the modem 140 associated with the repetition-based uplink component 150 may be performed by the transceiver 502.

[0077] Additionally, the memory 516 may be configured to store data used herein and / or an application 575 executed by at least one processor 512 or a local version based on one or more of the repetition-based uplink component 150 and / or its sub-components. The memory 516 may include any type of computer-readable medium that can be used by a computer or at least one processor 512, such as random access memory (RAM), read-only memory (ROM), magnetic tape, magnetic disk, optical disk, volatile memory, non-volatile memory, and any combination thereof. In one aspect, for example, the memory 516 may be a non-transitory computer-readable storage medium that stores one or more computer-executable codes defining one or more sub-components of the repetition-based uplink component 150 and / or its sub-components, and / or data associated therewith when the UE 110 is operating at least one processor 512 to execute the repetition-based uplink component 150 and / or one or more of its sub-components.

[0078] The transceiver 502 may include at least one receiver 506 and at least one transmitter 508. The receiver 506 may include hardware, firmware, and / or software code executable by a processor for receiving data, the code including instructions and being stored in a memory (e.g., a computer-readable medium). The receiver 506 may be, for example, an RF receiver. In one aspect, the receiver 506 may receive signals transmitted by at least one base station 105. Additionally, the receiver 506 may process such received signals and may also obtain measurement results of the signals, the measurement results such as but not limited to Ec / Io SNR, RSRP, RSSI, etc. The transmitter 508 may include hardware, firmware, and / or software code executable by a processor for transmitting data, the code including instructions and being stored in a memory (e.g., a computer-readable medium). Suitable examples of the transmitter 508 may include but are not limited to RF transmitters.

[0079] Additionally, in one aspect, the UE 110 may include an RF front end 588, which may operate to communicate with one or more antennas 565 and the transceiver 502 for receiving and transmitting wireless transmissions, such as wireless communications transmitted by at least one base station 105 or wireless transmissions transmitted by the UE 110. The RF front end 588 may be connected to one or more antennas 565 and may include one or more low-noise amplifiers (LNAs) 590, one or more switches 592, one or more power amplifiers (PAs) 598, and one or more filters 596 for transmitting and receiving RF signals.

[0080] In one aspect, the LNA 590 may amplify the received signal to a desired output level. In one aspect, each LNA 590 may have specified minimum and maximum gain values. In one aspect, the RF front end 588 may use one or more switches 592 to select a particular LNA 590 and its specified gain value based on the desired gain value for a particular application.

[0081] Furthermore, for example, one or more PAs 598 may be used by the RF front end 588 to amplify the signal for RF output to a desired output power level. In one aspect, each PA 598 may have specified minimum and maximum gain values. In one aspect, the RF front end 588 may use one or more switches 592 to select a particular PA 598 and the corresponding specified gain value based on the desired gain value for a particular application.

[0082] Additionally, for example, one or more filters 596 may be used by the RF front end 588 to filter received signals to obtain an input RF signal. Similarly, in one aspect, for example, corresponding filters 596 may be used to filter the output from the corresponding PA 598 to generate an output signal for transmission. In one aspect, each filter 596 may be connected to a specific LNA 590 and / or PA 598. In one aspect, the RF front end 588 may use one or more switches 592 to use the specified filters 596, LNA 590, and / or PA 598 based on a configuration specified by the transceiver 502 and / or the processor 512 to select a transmit path or a receive path.

[0083] Thus, the transceiver 502 may be configured to transmit and receive wireless signals via the RF front end 588 through one or more antennas 565. In one aspect, the transceiver 502 may be tuned to operate at a specified frequency such that the UE 110 can communicate with, for example, one or more base stations 105 or one or more cells associated with one or more base stations 105. For example, in one aspect, the modem 140 may configure the transceiver 502 to operate at a specified frequency and power level based on the UE configuration of the UE 110 and the communication protocol used by the modem 140.

[0084] In one aspect, the modem 140 may be a multi-band multi-mode modem that can process digital data and communicate with the transceiver 502 such that the transceiver 502 is used to transmit and receive digital data. In one aspect, the modem 140 may be multi-band and configured to support multiple frequency bands of a specific communication protocol. In one aspect, the modem 140 may be multi-mode and configured to support multiple operating networks and communication protocols. In one aspect, the modem 140 may control one or more components of the UE 110 (e.g., the RF front end 588, the transceiver 502) based on a specified modem configuration to enable the transmission and / or reception of signals from the network. In one aspect, the modem configuration may be based on the mode of the modem and the frequency band being used. In another aspect, the modem configuration may be based on UE configuration information associated with the UE 110 provided by the network during cell selection and / or cell reselection.

[0085] Reference Figure 6, An example implementation of base station 105 may include various components, some of which have been described above, but including components such as: one or more processors 612, a memory 616, and a transceiver 602 that communicate via one or more buses 644. These components may operate with a modem 160 and a repetition-based determination component 170 including an activation message 172 to enable one or more functions related to enabling repetition-based uplink communication with a UE in a new radio environment as described herein.

[0086] The transceiver 602, receiver 606, transmitter 608, one or more processors 612, memory 616, application 675, bus 644, RF front end 688, LNA 690, switch 692, filter 696, PA 698, and one or more antennas 665 may be the same as or similar to the corresponding components of UE 110 as described above, but are configured or otherwise programmed for base station operation rather than for UE operation.

[0087] The above detailed description set forth in conjunction with the accompanying drawings describes examples and does not represent the only examples that may be implemented or that are within the scope of the claims. When the term "example" is used in this specification, it means "serving as an example, instance, or illustration" and not "preferred" or "advantageous over other examples." For the purpose of providing an understanding of the described technology, the detailed description includes specific details. However, the technology may also be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0088] Information and signals may be represented using any of a variety of different methods and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, computer-readable code or instructions stored on a computer-readable medium, or any combination thereof.

[0089] The various illustrative blocks and components described in connection with the present disclosure may be implemented or performed with a specially programmed device, such as but not limited to: a processor, a digital signal processor (DSP), an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. The specially programmed processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, microcontroller, or state machine. The specially programmed processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such architecture.

[0090] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted via a non-transitory computer-readable medium as one or more instructions or code. Other examples and implementations are within the scope and spirit of the present disclosure and the appended claims. For example, due to the nature of software, the above functions may be implemented using software, hardware, firmware, hardwired, or any combination of these, executed by a specially programmed processor. The features for implementing the functions may also be physically located at different positions, including being distributed such that part of the functions are implemented at different physical locations. Additionally, as used herein (including in the claims), the "or" in a list of items ending with "at least one of..." indicates a discrete list, such that for example, "at least one of A, B, or C" means A or B or C or AB or AC or BC or ABC (i.e., A and B and C).

[0091] A computer-readable medium includes both computer storage media and communication media, where the communication media includes any medium that facilitates transfer of a computer program from one place to another. The storage media can be any available medium that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, a computer-readable medium can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code units in the form of instructions or data structures and that can be accessed by a general purpose or special purpose computer or a general purpose or special purpose processor. Additionally, any connection can be properly termed a computer-readable medium. For example, if software is transmitted using coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of the medium. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc, where disks typically reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0092] A previous description of the present disclosure is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the spirit or scope of the present disclosure. Additionally, while the elements of the described aspects and / or embodiments may be described or claimed in the singular, the plural is contemplated unless expressly stated to be limited to the singular. Further, unless otherwise stated, all or part of any aspect and / or embodiment may be used in conjunction with all or part of any other aspect and / or embodiment. Therefore, the present disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication, comprising: The user equipment UE receives an activation message for repeated uplink communication from a network entity, the activation message including at least one or more transmission parameters indicating a duration for transmission on an uplink communication channel and an uplink shortened transmission time interval sTTI mode for the transmission on the uplink communication channel; And The UE performs repeated transmissions on the uplink communication channel within the duration indicated by the one or more transmission parameters in the activation message, the repeated transmissions being configured based on the uplink sTTI, wherein performing the repeated transmissions further includes performing the repeated transmissions on a plurality of uplink sTTIs located in two or more subframes, wherein performing the repeated transmissions on the plurality of uplink sTTIs located in the two or more subframes further includes: transmitting a demodulation reference signal DMRS within each of the two or more subframes within the duration indicated by the one or more transmission parameters in the activation message, wherein the repeated transmissions include transmitting a packet multiple times.

2. The method according to claim 1, further comprising: The UE receives a configuration message for configuring the repeated uplink communication with the network entity, the configuration message including one or more configuration parameters, the duration and the uplink sTTI mode being further indicated by the one or more configuration parameters.

3. The method according to claim 2, wherein The configuration message is included in a radio resource control RRC message or a media access control MAC control element CE.

4. The method according to claim 1, wherein The activation message is included in a media access control MAC control element CE or a downlink control information DCI message.

5. The method according to claim 1, wherein The activation message is included in a grant message, and wherein the activation message includes an indication of the number of repeated transmissions to be performed.

6. The method according to claim 5, wherein The grant corresponds to a grant for a shortened physical uplink shared channel sPUSCH.

7. The method according to claim 1, wherein Performing the repeated transmissions on the plurality of uplink sTTIs located in the two or more subframes further includes: maintaining a phase continuity parameter across one or more subframes within the duration indicated by the one or more transmission parameters in the activation message.

8. The method according to claim 1, wherein Performing the repeated transmissions further includes transmitting a sounding reference signal SRS on the last symbol of a subframe.

9. The method according to claim 1, wherein The uplink sTTI mode for the transmission on the uplink communication channel corresponds to a fixed uplink sTTI mode configured for each starting sTTI and the duration for the transmission on the uplink communication channel.

10. The method according to claim 2, wherein the duration includes a plurality of the plurality of uplink sTTIs.

11. The method according to claim 10, wherein the repeated transmission includes a repeated transmission of data information.

12. The method according to claim 10, wherein the repeated transmission includes a repeated transmission of packets.

13. An apparatus for wireless communication, comprising: A memory; And A processor, which communicates with the memory, wherein the processor is configured to: Receive an activation message for repeated uplink communication from a network entity, the activation message including at least one or more transmission parameters indicating a duration for transmission on an uplink communication channel and an uplink shortened transmission time interval sTTI mode for the transmission on the uplink communication channel; and Perform a repeated transmission on the uplink communication channel within the duration indicated by the one or more transmission parameters in the activation message, where the repeated transmission is configured based on the uplink sTTI mode. Wherein, the processor is configured to perform the repeated transmission on multiple uplink sTTIs located in two or more subframes. Wherein, the processor is further configured to transmit a Demodulation Reference Signal (DMRS) within each of the two or more subframes within the duration indicated by the one or more transmission parameters in the activation message. Wherein, the repeated transmission includes transmitting a packet multiple times.

14. The apparatus according to claim 13, wherein The processor is further configured to: receive a configuration message for configuring the repeated uplink communication with the network entity, the configuration message including one or more configuration parameters. The duration and the uplink sTTI mode are further indicated by the one or more configuration parameters. Wherein, the processor configured to perform the repeated transmission on the multiple uplink sTTIs located in the two or more subframes is further configured to transmit a Demodulation Reference Signal (DMRS) within each of the two or more subframes within the duration indicated by the one or more transmission parameters in the activation message.

15. The device according to claim 14, wherein, The configuration message is included in a Radio Resource Control (RRC) message or a Medium Access Control (MAC) Control Element (CE).

16. The device according to claim 13, wherein, The activation message is included in a Medium Access Control (MAC) Control Element (CE) or a Downlink Control Information (DCI) message.

17. The device according to claim 13, wherein, The activation message is included in a grant message, and wherein the activation message includes an indication of the number of repeated transmissions to be performed.

18. The device according to claim 17, wherein, The grant corresponds to a grant for a Short Physical Uplink Shared Channel (sPUSCH).

19. The device according to claim 13, wherein, The processor configured to perform the repeated transmission on the multiple uplink sTTIs located in the two or more subframes is further configured to maintain a phase continuity parameter across one or more subframes within the duration indicated by the one or more transmission parameters in the activation message.

20. The device according to claim 13, wherein, The processor configured to perform the repeated transmission is further configured to transmit a Sounding Reference Signal (SRS) on the last symbol of a subframe.

21. The device according to claim 13, wherein, The uplink sTTI mode for the transmission on the uplink communication channel corresponds to a fixed uplink sTTI mode configured for each starting sTTI and the duration for the transmission on the uplink communication channel.

22. The device according to claim 13, wherein the duration includes a plurality of the plurality of uplink sTTIs.

23. The device according to claim 22, wherein the repeated transmission includes a repeated transmission of data information.

24. The device according to claim 23, wherein the repeated transmission includes a repeated transmission of packets.

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