CN107624251B

CN107624251B - Wireless communication

Info

Publication number: CN107624251B
Application number: CN201680015727.4A
Authority: CN
Inventors: N·布尚; K·K·穆卡维利; 季庭方; J·E·斯米; 蒋靖; J·B·索里阿加
Original assignee: Qualcomm Inc
Current assignee: Qualcomm Inc
Priority date: 2016-01-15
Filing date: 2016-03-28
Publication date: 2021-01-08
Anticipated expiration: 2036-03-28
Also published as: EP3272045A1; CN107624251A

Abstract

Techniques for wireless communication are described. The first method comprises the following steps: wirelessly communicating, at a first device, with a second device according to a first subframe structure; receiving a subframe truncation parameter from a second device; and terminating the first subframe structure based at least in part on the subframe truncation parameter. The first subframe structure includes a first periodic sequence of downlink Transmission Time Intervals (TTIs) and uplink TTIs. The second method comprises the following steps: wirelessly communicating, at a first device, with a second device according to a parameterized self-contained subframe structure having an interlace portion and a tail portion; and reducing a delay indicated by the nominal trigger-response delay parameter associated with the downlink TTI to enable transmission of a response message corresponding to the downlink TTI during an end portion and prior to termination of the subframe structure.

Description

Wireless communication

Cross-referencing

This patent application claims U.S. provisional patent application No.62/133,862 entitled "Parameterized selected-connected Subframe Structure reception an interleaved reception by a Tail reception" filed 3, 16/2015 by Bhushan et al; and U.S. patent application No.14/996,902 entitled "partitioned Self-Contained Subframe Structure switching contaminated by a Tail Port" filed on 15/1/2016 by Bhushan et al; each of the above applications is assigned to the assignee of the present application.

Technical Field

The present disclosure relates to, for example, wireless communication systems, and more particularly to a parameterized self-contained subframe structure having an interleaved portion followed by an end portion.

Background

Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be multiple-access systems capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems (i.e., systems in different devices transmit different SC-FDMA symbol streams on different orthogonal resources), and Orthogonal Frequency Division Multiple Access (OFDMA) systems.

By way of example, a wireless multiple-access communication system may include multiple base stations, Wi-Fi access points, mesh schedulers, and the like, each supporting communication for multiple communication devices (otherwise referred to as User Equipment (UE)) simultaneously. A base station, Wi-Fi access point, or mesh scheduler may communicate with a scheduled device (e.g., UE) on a downlink channel (e.g., for transmissions from the scheduled device (e.g., base station, Wi-Fi access point, or mesh scheduler) to the UE) and an uplink channel (e.g., for transmissions from the scheduled device to the scheduling device).

Disclosure of Invention

The present disclosure relates to, for example, wireless communication systems, and more particularly to a parameterized self-contained subframe structure having an interleaved portion followed by an end portion. Some devices, such as base stations and UEs that communicate using Long Term Evolution (LTE) or LTE-advanced (LTE-a) communications, may use an interleaved subframe structure in which multiple hybrid arq (harq) feedback processes may be interleaved. Some devices, such as Wi-Fi access points and Wi-Fi stations that communicate using Wi-Fi communication, may use a one-shot (non-interleaved) subframe structure. The present disclosure describes parameterized self-contained subframe structures that combine aspects of an interleaved subframe structure and a single-transmission-mode subframe structure.

In one example, a method of wireless communication at a first device is described. The method may include: wirelessly communicating with a second device according to a first subframe structure; receiving a subframe truncation parameter from the second device; and terminating the first subframe structure based at least in part on the subframe truncation parameter. The first subframe structure may include a first periodic sequence of downlink Transmission Time Intervals (TTIs) and uplink TTIs.

In some examples of the method, the subframe truncation parameter may determine a total number of TTIs in the first subframe structure, and may divide the total number of TTIs into an interlace portion and an end portion. In some examples, the end portion may include a single transmission mode portion. In some examples, each downlink TTI of the first periodic sequence may be associated with a nominal trigger-response delay parameter. In some examples, the nominal trigger-response delay parameter associated with a downlink TTI may be a function of a TTI index associated with the downlink TTI.

In some examples, wirelessly communicating with the second device according to the first subframe structure may include: receiving a first trigger message from the second device during a first downlink TTI within the interleaved portion; and after receiving the first trigger message, sending a first response message associated with the first trigger message to the second device. The first response message may be transmitted in an earliest uplink TTI of the first subframe structure that satisfies the nominal trigger-response delay parameter associated with the first downlink TTI. In some examples, wirelessly communicating with the second device according to the first subframe structure may include: receiving a second trigger message from the second device during a second downlink TTI within the tail portion; and after receiving the second trigger message, sending a second response message associated with the second trigger message to the second device. The second response message may be transmitted in a last uplink TTI of the first subframe structure.

In some examples of the method, each uplink TTI of the first periodic sequence may be associated with a nominal response-retrigger delay parameter. In some examples, the nominal response-retriggering delay parameter associated with an uplink TTI may be a function of a TTI index associated with the downlink TTI. In some examples, wirelessly communicating with the second device according to the first subframe structure may include: transmitting a first response message to the second device during a first uplink TTI within the interleaved portion; and after sending the first response message, receiving a first retrigger message associated with the first response message from the second device. The first retrigger message is received in a downlink TTI of the first subframe structure that satisfies the nominal response-retrigger delay parameter associated with the first uplink TTI. In some examples, wirelessly communicating with the second device according to the first subframe structure may include: transmitting a second response message to the second device during a second uplink TTI within the last tail portion; and receiving a second re-trigger message from the second device after sending the second response message. The second retrigger message may be received in a second subframe structure subsequent to the first subframe structure.

In some examples, the method may include: rewriting the nominal trigger-response delay parameter or the nominal response-retrigger delay parameter associated with the first subframe structure based at least in part on the subframe truncation parameter. In some examples, rewriting the nominal trigger-response delay parameter may include: reducing a delay indicated by the nominal trigger-response delay parameter to enable transmission of a response message prior to termination of the first subframe structure.

In some examples of the method, the first periodic sequence of downlink TTIs and uplink TTIs may include a repeating sequence of downlink bursts and uplink bursts, each downlink burst may include a first set of one or more downlink TTIs, and each uplink burst may include a second set of one or more uplink TTIs. In some examples, at least some of the uplink bursts and the downlink bursts may be separated by guard time intervals.

In some examples, the method may include: following termination of the first subframe structure, wirelessly communicating with the second device according to a second subframe structure associated with a second periodic sequence of TTIs. In some examples, the first periodic sequence and the second periodic sequence may be the same periodic sequence. In some examples, one of the first and second periodic sequences may include at least an interleaved portion and the other of the first and second periodic sequences may include a single transmission mode portion.

In some examples, the method may include: a plurality of parameters is received from the second device. The plurality of parameters may include at least one of: a first number of TTIs in a downlink burst, or a second number of TTIs in an uplink burst, or a nominal trigger-response delay parameter, or a nominal response-retrigger delay parameter, or a combination thereof. In some examples, a parameter of the plurality of parameters may be received semi-statically at a frequency less than once per subframe or dynamically at the beginning of each subframe.

In some examples, the method may include: a plurality of parameters defining a configuration of a default subframe structure are semi-statically received at a frequency less than once per subframe. The method may further comprise: receiving a bit at a beginning of the first subframe structure, the bit to indicate whether the first subframe structure follows the configuration of the default subframe structure or a configuration of a predefined single transmission mode subframe structure.

In some examples, the method may include: storing, at the first device, a plurality of parameters defining two or more subframe structures; and receiving a signal at the beginning of the first subframe structure, the signal indicating which of the two or more subframe structures is used for the first subframe structure. In some examples, the method may include: storing at least one of the two or more subframe structures in response to at least one of: semi-static signaling received at the first device, or a pre-configuration of the first device, or a combination thereof. In some examples of the method, the subframe truncation parameter may be received during the first subframe structure.

In one example, a downlink apparatus for wireless communication at a first device is described. The apparatus may include: means for wirelessly communicating with a second device according to a first subframe structure; means for receiving a subframe truncation parameter from the second device; and means for terminating the first subframe structure based at least in part on the subframe truncation parameter. The first subframe structure may include a first periodic sequence of downlink TTIs and uplink TTIs.

In one example, another apparatus for wireless communication at a first device is described. The apparatus may include a processor and a memory coupled to the processor. The processor may be configured to: wirelessly communicating with a second device according to a first subframe structure; receiving a subframe truncation parameter from the second device; and terminating the first subframe structure based at least in part on the subframe truncation parameter. The first subframe structure may include a first periodic sequence of downlink TTIs and uplink TTIs.

In some examples, a computer-readable medium for storing instructions executable by a processor is described. The instructions may include: instructions for wirelessly communicating with a second device according to a first subframe structure; instructions for receiving a subframe truncation parameter from the second device; and means for terminating the first subframe structure based at least in part on the subframe truncation parameter. The first subframe structure may include a first periodic sequence of downlink TTIs and uplink TTIs.

In one example, a method of wireless communication at a second device is described. The method may include: wirelessly communicating with a first device according to a first subframe structure; transmitting a subframe truncation parameter to the first device; and terminating the first subframe structure based at least in part on the subframe truncation parameter. The first subframe structure may include a first periodic sequence of downlink TTIs and uplink TTIs.

In some examples of the method, the first periodic sequence of downlink TTIs and uplink TTIs may include a repeating sequence of downlink bursts and uplink bursts, where each downlink burst includes a first set of one or more downlink TTIs and each uplink burst may include a second set of one or more uplink TTIs. In some examples, at least some of the uplink bursts and the downlink bursts may be separated by guard time intervals.

In some examples, the method may include: following termination of the first subframe structure, wirelessly communicating with the first device according to a second subframe structure associated with a second periodic sequence of TTIs. In some examples, the first periodic sequence and the second periodic sequence may be the same periodic sequence. In some examples, one of the first and second periodic sequences may include at least an interleaved portion and the other of the first and second periodic sequences may include a single transmission mode portion.

In some examples, the method may include: prior to terminating the first subframe structure, receiving a transmission of a response message associated with a trigger message transmitted during a TTI of the first subframe structure, wherein the response message is received with a first trigger-response delay that is reduced compared to a second trigger-response delay indicated by a nominal trigger-response delay parameter associated with the TTI. In some examples, the subframe truncation parameter may determine a total number of TTIs in the first subframe structure, and may divide the total number of TTIs into an interlace portion and an end portion. In some examples, the end portion may include a single transmission mode portion. In some examples, the method may include: transmitting a plurality of parameters to the first device, wherein the plurality of parameters comprise at least one of: a first number of TTIs in a downlink burst, or a second number of TTIs in an uplink burst, or a nominal trigger-response delay parameter, or a nominal response-retrigger delay parameter, or a combination thereof. In some examples, a parameter of the plurality of parameters may be transmitted semi-statically at a frequency less than once per subframe or dynamically at the beginning of each subframe.

In some examples of the method, the subframe truncation parameter may be transmitted during the first subframe structure. In some examples, the subframe truncation parameter may be transmitted during a predetermined TTI of the first subframe structure or during a dynamically determined TTI of the first subframe structure, wherein the dynamically determined TTI occurs before beginning to terminate the first subframe structure. In some examples, the method may include: dynamically determining a value of the subframe truncation parameter based on at least one of: a traffic type, or a first bandwidth of the first device, or a second bandwidth associated with traffic for the first device, or a memory constraint, or a packet size, or an indicated level of service, or a combination thereof. The wireless communication between the first device and the second device may be scheduled by the second device.

In one example, another apparatus for wireless communication at a second device is described. The apparatus may include: means for wirelessly communicating with a first device according to a first subframe structure; means for transmitting a subframe truncation parameter to the first device; and means for terminating the first subframe structure based at least in part on the subframe truncation parameter. The first subframe structure may include a first periodic sequence of downlink TTIs and uplink TTIs.

In one example, another apparatus for wireless communication at a second device is described. The apparatus may include a processor and a memory coupled to the processor. The processor may be configured to: wirelessly communicating with a first device according to a first subframe structure; transmitting a subframe truncation parameter to the first device; and terminating the first subframe structure based at least in part on the subframe truncation parameter. The first subframe structure may include a first periodic sequence of downlink TTIs and uplink TTIs.

In some examples, another computer-readable medium for storing instructions executable by a processor is described. The instructions may include: instructions for wirelessly communicating with a first device according to a first subframe structure; instructions for transmitting a subframe truncation parameter to the first device; and means for terminating the first subframe structure based at least in part on the subframe truncation parameter. The first subframe structure may include a first periodic sequence of downlink TTIs and uplink TTIs.

The foregoing has outlined rather broadly the features and technical advantages of an example in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The nature of the concepts disclosed herein (both as to their organization and method of operation), together with the associated advantages, will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purpose of illustration and description and is not intended as a definition of the limits of the claims.

Drawings

A further understanding of the nature and advantages of the present invention may be realized by reference to the following drawings. In the drawings, similar components or features may have the same reference numerals. In addition, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If only the first reference label is used in the specification, the description may apply to any one of the similar components having the same first reference label, regardless of the second reference label.

Fig. 1 illustrates an example of a wireless communication system in accordance with various aspects of the present disclosure;

fig. 2 illustrates an example uniformly interleaved subframe structure that may be used for wireless communications, in accordance with various aspects of the present disclosure;

fig. 3 illustrates an example non-uniformly interleaved subframe structure that may be used for wireless communications, in accordance with various aspects of the present disclosure;

fig. 4 illustrates an example single transmission mode subframe structure that may be used for wireless communication, in accordance with various aspects of the present disclosure;

fig. 5 illustrates an example parameterized self-contained subframe structure that may be used for wireless communications, in accordance with various aspects of the present disclosure;

fig. 6 illustrates a block diagram of an apparatus for use in wireless communications, in accordance with various aspects of the disclosure;

fig. 7 illustrates a block diagram of an apparatus for use in wireless communications, in accordance with various aspects of the disclosure;

fig. 8 illustrates a block diagram of an apparatus for use in wireless communications, in accordance with various aspects of the disclosure;

fig. 9 illustrates a block diagram of an apparatus for use in wireless communications, in accordance with various aspects of the disclosure;

fig. 10 illustrates a block diagram of an apparatus for use in wireless communications, in accordance with various aspects of the disclosure;

fig. 11 illustrates a block diagram of an apparatus for use in wireless communications, in accordance with various aspects of the disclosure;

fig. 12 illustrates a block diagram of a UE for use in wireless communications, in accordance with various aspects of the present disclosure;

fig. 13 illustrates a block diagram of a base station (e.g., a base station forming a portion or all of an eNB) for use in wireless communications, in accordance with various aspects of the disclosure;

fig. 14 is a flow diagram illustrating an example method of wireless communication at a first device in accordance with various aspects of the disclosure;

fig. 15 is a flow diagram illustrating an example method of wireless communication at a first device in accordance with various aspects of the disclosure;

fig. 16 is a flow diagram illustrating an example method of wireless communication at a first device in accordance with various aspects of the disclosure;

fig. 17 is a flow diagram illustrating an example method of wireless communication at a second device in accordance with various aspects of the disclosure;

fig. 18 is a flow diagram illustrating an example method of wireless communication at a second device in accordance with various aspects of the disclosure; and

fig. 19 is a flow diagram illustrating an example method of wireless communication at a second device in accordance with various aspects of the disclosure.

Detailed Description

Techniques are described in which a parameterized self-contained subframe structure with an interlace portion followed by an end portion is used for communications between scheduling devices (e.g., base stations, Wi-Fi access points, and mesh schedulers) and scheduled devices (e.g., UEs). Parameterized standalone subframe structures may be useful because they provide a common subframe structure in which the subframe structures used by LTE/LTE-a devices and Wi-Fi devices may be implemented. The interleaved portion of the subframe structure may enable low switching overhead for medium latency traffic, while the end portion of the subframe structure may provide low latency and lower HARQ buffer requirements. In the tail portion, the trigger-response delay associated with the downlink TTI may be reduced relative to a nominal trigger-response delay that would be used if the downlink TTI were to occur during the interlace portion. The reduced trigger-response delay causes a response message corresponding to the trigger message sent during (or before) the end portion to be sent before termination of the parameterized self-contained subframe structure.

A network (e.g., an LTE/LTE-a network) may start with interleaved portions of a subframe structure when serving large amounts of data with medium data rate and medium latency requirements, but terminate with end portions (e.g., single transmission mode portions) as soon as low latency traffic (e.g., mission critical data packets, or haptic user experience packets) or very large data packets arrive (destined for a receiver with high throughput, memory constrained decoder). Following termination of the parameterized self-contained subframe structure, the network may switch to using the single-transmission mode subframe structure until low-latency traffic or very large data packets have been delivered. Subsequently, the network can switch back to a parameterized free-standing subframe structure with interleaved portions of indeterminate duration. In other words, the parameterized self-contained subframe structure may provide a unified framework for catering to highly diverse traffic types and service requirements without requiring changes to the underlying MAC protocol.

The following description provides examples, and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in an order different than that described, and various steps may be added, omitted, or combined. Furthermore, features described with respect to some examples may be combined into other examples.

Fig. 1 illustrates an example of a wireless communication system 100 in accordance with various aspects of the disclosure. The wireless communication system 100 may include base stations 105, UEs 115, and a core network 130. The core network 130 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 130 over a backhaul link 132 (e.g., S1, etc.) and may perform wireless configuration and scheduling for communication with the UE115 or may operate under the control of a base station controller (not shown). In various examples, the base stations 105 can communicate with each other directly or indirectly (e.g., through the core network 130) through backhaul links 134 (e.g., X1, etc.), which backhaul links 134 can be wired or wireless communication links.

The base station 105 may communicate wirelessly with the UE115 via one or more base station antennas. Each of the base station 105 sites may provide communication coverage for a respective geographic coverage area 110. In some examples, the base station 105 may be referred to as a base station transceiver, a wireless base station, an access point, a wireless transceiver, a node B, an evolved node B (enb), a home node B, a home evolved node B, or some other suitable terminology. The geographic coverage area 110 for a base station 105 can be divided into sectors (not shown), which form a portion of the coverage area. The wireless communication system 100 may include different types of base stations 105 (e.g., macro cell base stations or small cell base stations). For different technologies, there may be overlapping geographic coverage areas 110.

In some examples, the wireless communication system 100 may include an LTE/LTE-a network. In an LTE/LTE-a network, the term evolved node b (enb) may be used to describe the base station 105. The wireless communication system 100 may be a heterogeneous LTE/LTE-a network, where different types of enbs provide coverage for various geographic areas. For example, each eNB or base station 105 may provide communication coverage for a macro cell, a small cell, or other type of cell. The term "cell" is a 3GPP term that can be used to describe a base station, a carrier or component carrier associated with a base station, or a coverage area (e.g., sector, etc.) of a carrier or base station, depending on the context.

A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions with the network provider. A small cell may be a lower power base station than a macro cell, which may operate in the same or different (e.g., dedicated, shared, etc.) radio frequency spectrum as the macro cell. The small cells may include pico cells, femto cells, and micro cells according to various examples. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions with the network provider. A femto cell may also cover a small geographic area (e.g., a home) and may provide restricted access by UEs having an association with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG), UEs for users in the home, etc.). The eNB for the macro cell may be referred to as a macro eNB. An eNB for a small cell may be referred to as a small cell eNB, pico eNB, femto eNB, or home eNB. An eNB may support one or more (e.g., two, three, four, etc.) cells (e.g., component carriers).

The wireless communication system 100 may support synchronous operation or asynchronous operation. For synchronous operation, the base stations may have similar frame timing, and transmissions from different base stations may be approximately aligned in time. For asynchronous operation, the base stations may have different frame timings, and transmissions from different base stations may not be aligned in time. The techniques described herein may be used for synchronous operations or asynchronous operations.

A communication network that may accommodate some of the various disclosed examples may be a packet-based network operating according to a layered protocol stack. In the user plane, communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. The Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate over logical channels. A Medium Access Control (MAC) layer may perform priority processing and multiplexing of logical channels into transport channels. The MAC layer may also use hybrid arq (harq) to provide retransmissions at the MAC layer to improve link efficiency. In the control plane, a Radio Resource Control (RRC) protocol layer may provide for the establishment, configuration, and maintenance of RRC connections between UEs 115 and base stations 105 or core network 130 to support radio bearers for user plane data. At the Physical (PHY) layer, transport channels may be mapped to physical channels.

UEs 115 may be dispersed throughout the wireless communication system 100, and each UE115 may be fixed or mobile. The UE115 may also include or be referred to by those skilled in the art as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. The UE115 may be a cellular telephone, a Personal Digital Assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a tablet computer, a laptop computer, a cordless telephone, a Wireless Local Loop (WLL) station, or the like. The UE is capable of communicating with various types of base stations and network devices, including macro enbs, small cell enbs, relay base stations, and the like.

The communication links 125 shown in the wireless communication system 100 may include Downlink (DL) transmissions from the base stations 105 to the UEs 115, or Uplink (UL) transmissions from the UEs 115 to the base stations 105. Downlink transmissions may also be referred to as forward link transmissions, and uplink transmissions may also be referred to as reverse link transmissions.

In some examples, each communication link 125 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, and so on. Communication link 125 may transmit bi-directional communications using Frequency Domain Duplex (FDD) operation (e.g., using paired spectrum resources) or Time Domain Duplex (TDD) operation (e.g., using unpaired spectrum resources). A frame structure (e.g., frame structure type 1) for FDD operation and a frame structure (e.g., frame structure type 2) for TDD operation may be defined.

In some examples of the wireless communication system 100, the base station 105 or the UE115 may include multiple antennas to employ an antenna diversity scheme to improve the quality and reliability of communications between the base station 105 and the UE 115. Additionally or alternatively, the base station 105 or UE115 may employ multiple-input multiple-output (MIMO) techniques, which may utilize a multipath environment to transmit multiple spatial layers carrying the same or different encoded data.

As shown in fig. 1, the wireless communication system 100 may also or alternatively include one or more WLAN access points, such as a Wi-Fi access point 135 that transmits data to one or more UEs 115 (e.g., UEs 115 that may be configured as Wi-Fi stations) and receives data from one or more UEs 115. The wireless communication system 100 may also include one or more mesh networks, as indicated by the communication links 145 between certain UEs 115. More generally, the wireless communication system 100 may include a plurality of scheduling devices (e.g., base stations 105, Wi-Fi access points 135, or mesh schedulers (which may be UEs 115)) and a plurality of scheduled devices. Typically, UE115 will be the scheduled device, but need not be. When referring to communication between devices in the present disclosure, transmissions from a scheduling device to a scheduled device are referred to as downlink transmissions, while transmissions from a scheduled device to a scheduling device are referred to as uplink transmissions.

Fig. 2 illustrates an example uniformly interleaved subframe structure 200 that may be used for wireless communications, in accordance with various aspects of the present disclosure. In some examples, the subframe structure 200 may be used for communication between a base station and a UE (e.g., between the base station 105 and the UE115 described with reference to fig. 1), or more generally between a scheduling device and a scheduled device.

For example, subframe structure 200 is shown as a periodic sequence including downlink (D) Transmission Time Intervals (TTIs) and uplink (U) TTIs. The periodic sequence of downlink TTIs and uplink TTIs may include a repeating sequence of downlink bursts 205 and uplink bursts 210, where each downlink burst 205 includes a set of one or more downlink TTIs and each uplink burst 210 includes a set of one or more uplink TTIs. Each set of one or more downlink TTIs may include M TTIs, where M is an integer greater than one. Each set of one or more uplink TTIs may include M 'TTIs, where M' is also an integer greater than one. A Guard Time (GT) interval (TDD or FDD) may or may not be provided between the downlink burst 205 with M TTIs and the uplink burst 210 with M' TTIs. Although the subframe structure 200 is shown as having twelve TTIs divided between the first downlink burst 205-a, the uplink burst 210, and the second downlink burst 205-b, the subframe structure 200 may include any number of TTIs and any number of downlink bursts 205 and uplink bursts 210.

Packet scheduling and HARQ feedback processing may be incorporated into the subframe structure 200 as follows. The base station may transmit the trigger message during a downlink TTI in the downlink burst 205 having M TTIs. A UE receiving the trigger message may respond by transmitting a first response message during an uplink TTI in a subsequent uplink burst 210 having M' TTIs. The response message may be transmitted after a trigger-response delay of N TTIs (i.e., the response message may be transmitted in the earliest uplink TTI that occurs at least N TTIs after the downlink TTI in which the trigger message is transmitted/received). In response to receiving the response message, the base station may transmit a first retrigger message to the UE during a downlink TTI in a subsequent downlink burst 210 having M TTIs. The retrigger message may be transmitted after a response-trigger delay having N 'TTIs (i.e., the retrigger message may be transmitted in a downlink TTI occurring N' TTIs after an uplink TTI in which the response message is transmitted/received). The UE may then respond by sending a second response message, and so on. In this disclosure, references to trigger messages may be considered to include references to re-trigger messages and vice versa.

Each downlink TTI in the downlink burst 205 having M TTIs may be associated with the same value of N, and each uplink TTI in the uplink burst 210 having M ' TTIs may be associated with the same value of N ', where M ═ N ' provides uniformity in the uniformly interleaved subframe structure 200.

Fig. 3 illustrates an example non-uniformly interleaved subframe structure 300 that can be utilized for wireless communications, in accordance with various aspects of the disclosure. In some examples, the subframe structure 300 may be used for communication between a base station and a UE (e.g., between the base station 105 and the UE115 described with reference to fig. 1), or more generally between a scheduling device and a scheduled device.

For example, the subframe structure 300 is shown as a periodic sequence including downlink (D) Transmission Time Intervals (TTIs) and uplink (U) TTIs. The periodic sequence of downlink TTIs and uplink TTIs may include a repeating sequence of downlink bursts 305 and uplink bursts 310, where each downlink burst 305 includes a set of one or more downlink TTIs and each uplink burst 310 includes a set of one or more uplink TTIs. Each set of one or more downlink TTIs may include M TTIs, where M is an integer greater than one. Each set of one or more uplink TTIs may include M 'TTIs, where M' is also an integer greater than one. A GT interval (TDD or FDD) may or may not be provided between the downlink burst 305 having M TTIs and the uplink burst 310 having M' TTIs. Although the sub-frame structure 300 is shown as having ten TTIs divided between the first downlink burst 305-a, the first uplink burst 310-a, the second downlink burst 305-b, and the second uplink burst 310-b, the sub-frame structure 300 may include any number of TTIs and any number of downlink bursts 305 and uplink bursts 310.

Packet scheduling and HARQ feedback processing may be incorporated into the subframe structure 300 as follows. The base station may transmit the trigger message during a downlink TTI in the downlink burst 305 having M TTIs. A UE receiving the trigger message may respond by transmitting a first response message during an uplink TTI in a subsequent uplink burst 310 having M' TTIs. The response message may be transmitted after a trigger-response delay of N TTIs (i.e., the response message may be transmitted in the earliest uplink TTI that occurs at least N TTIs after the downlink TTI in which the trigger message is transmitted/received). In response to receiving the response message, the base station may transmit a first retrigger message to the UE during a downlink TTI in a subsequent downlink burst 305 having M TTIs. The retrigger message may be transmitted after a response-trigger delay having N 'TTIs (i.e., the retrigger message may be transmitted in a downlink TTI occurring N' TTIs after an uplink TTI in which the response message is transmitted/received). The UE may then respond by sending a second response message, and so on.

The downlink TTIs in the downlink burst 305 having M TTIs may be associated with the same value of N or different values of N, and the uplink TTIs in the uplink burst 310 having M ' TTIs may be associated with the same value of N ' or different values of N ', where N + N ' ≧ M + M ' for each HARQ feedback process, and the allowed variability of the individual values M, M ', N, and N ' provide non-uniformity in the non-uniform interleaved subframe structure 300.

In some example uses of subframe structure 200 or subframe structure 300, the trigger message may include a first data transmission (e.g., a first data packet), in which case the first response message may include acknowledgement or negative acknowledgement (ACK/NACK) feedback, and the retrigger message may include a second data transmission (e.g., an incremental Redundancy Version (RV) corresponding to the first data transmission, or a repetition of the first data transmission (e.g., in response to NACK feedback), or a second data packet (e.g., in response to ACK feedback)). As an alternative example, the trigger message may comprise a first uplink resource grant, the first response message may comprise a data packet, and the retrigger message may comprise a retransmission request or a second uplink resource grant.

In each of subframe structure 200 and subframe structure 300, the configuration of TTIs and the interrelation between the trigger message, the response message, and the retrigger message result in a retransmission delay (plus the GT interval delay, if any) of N + N 'TTIs, and up to N + N' active HARQ feedback processing interlaces. LTE/LTE-a communications use such a subframe structure. For example, LTE/LTE-a FDD communication is an example of communication using a uniform interleaved subframe structure, where M ═ N ═ 4 for all TTIs (resulting in a uniform interleaved subframe structure with eight HARQ feedback processing interlaces). In another aspect, LTE/LTE-a TDD communications are examples of communications using non-uniform interleaved subframe structures, where different LTE/LTE-a TDD configurations each have a unique combination of M and M' values, where M + M ═ 5 TTIs or M + M ═ 10 TTIs for each configuration. Further, in each LTE/LTE-a TDD configuration, each downlink TTI may be associated with its own combination of N and N ' values, where N >3, N ' >3, and N + N ' ═ 10 for each LTE/LTE-a TDD configuration. In other words, LTE/LTE-a TDD communications use a non-uniform/irregular subframe structure with retransmission delay of 10 TTIs and 10 HARQ feedback processing interlaces.

An interleaved subframe structure (e.g., a uniformly interleaved subframe structure or a non-uniformly interleaved subframe structure) may be useful because the interleaved subframe structure provides N or N' subframes to a receiving device to process resource grants or decode data packets, which may result in savings in decoder cost, size, and complexity. Furthermore, in TDD mode, using an interleaved subframe structure, each N + N' interlace provides only two switches of transmit/receive direction. This switching overhead can be minimized by choosing a sufficiently large value of M + M '(which implies a correspondingly large value of N + N'). However, in a HARQ based system, the receiving device may need to maintain a buffer for data packets that have been partially received up to N + N '≧ M + M'. Furthermore, the retransmission latency of N + N' may be too large for some applications (e.g., task-critical applications or haptic user experience applications).

Fig. 4 illustrates an example single transmission mode subframe structure 400 that may be used for wireless communication, in accordance with various aspects of the present disclosure. In some examples, the subframe structure 400 may be used for communication between a Wi-Fi access point and a UE (e.g., between the Wi-Fi access point 135 and the UE115 described with reference to fig. 1), or more generally between a scheduling device and a scheduled device.

For example, the subframe structure 400 is shown to include a single downlink (D) TTI and a single uplink (U) TTI. A Wi-Fi access point may transmit a trigger message during a downlink TTI, and a UE receiving the trigger message may respond by transmitting a response message during an uplink TTI. If the response message indicates that decoding of the data packet included in the trigger message was unsuccessful, a retransmission (e.g., an incremented RV corresponding to the data packet, or a repetition of the data packet) may occur during the downlink TTI of the next single transmission mode subframe structure. The timing relationship between the current subframe structure and the subsequent subframe structure may not be specified. Therefore, asynchronous HARQ may be used. The single transmission mode subframe structure may be used for TDD communications and, therefore, a GT interval may be included between the downlink TTI and the uplink TTI to account for transceiver switching time and round trip propagation delay and also to account for baseband processing/decoding delay.

The single-transmission mode subframe structure may be useful because it reduces buffer requirements and retransmission delays associated with the interleaved subframe structure. However, it is also at the cost of a fast decoder and higher switching overhead (e.g., GT intervals occur every few TTIs) associated with greater cost, size, or complexity.

Fig. 5 illustrates an example parameterized self-contained subframe structure 500 that can be used for wireless communications, in accordance with various aspects of the present disclosure. The subframe structure 500 includes an interleaved portion 515 and an end portion 520, where the interleaved portion 515 has aspects of the uniformly interleaved subframe structure 200 or the non-uniformly interleaved subframe structure 300 described with reference to fig. 2 or 3. The end portion 520 may incorporate aspects of the single transmission mode subframe structure 400 described with reference to fig. 4. In some examples, the subframe structure 500 may be used for communication between any scheduling device (e.g., the base station 105, the Wi-Fi access point 135, or the mesh network scheduler) and the UE115 described with reference to fig. 1.

For example, the interleaved portion of the subframe structure 500 is shown as a periodic sequence including downlink (D) TTIs and uplink (U) TTIs. The periodic sequence of downlink TTIs and uplink TTIs may include a repeating sequence of downlink bursts 505 and uplink bursts 510, where each downlink burst 505 includes a set of one or more downlink TTIs and each uplink burst 510 includes a set of one or more uplink TTIs. Each set of one or more downlink TTIs may include M TTIs, where M is an integer greater than one. Each set of one or more uplink TTIs may include M 'TTIs, where M' is also an integer greater than one. A GT interval (TDD or FDD) may or may not be provided between the downlink burst 505 having M TTIs and the uplink burst 510 having M' TTIs. Although the interleaved portion of the sub-frame structure 500 is shown as having five TTIs divided between the first downlink burst 505-a and the first uplink burst 510-a, the interleaved portion 515 of the sub-frame structure 500 may include any number of TTIs and any number of downlink bursts 505 and uplink bursts 510.

Packet scheduling and HARQ feedback processing may be incorporated into the interleaved portion of the subframe structure 500 as follows. The base station may transmit the trigger message during a downlink TTI in the downlink burst 505 having M TTIs. A UE receiving the trigger message may respond by transmitting a first response message during an uplink TTI in a subsequent uplink burst 510 having M' TTIs. The response message may be sent after a nominal trigger-response delay of N TTIs (i.e., the response message may be sent in the earliest uplink TTI that occurs at least N TTIs after the downlink TTI in which the trigger message is sent/received). In response to receiving the response message, the base station may send a first retrigger message to the UE during a downlink TTI in a subsequent downlink burst 505 (e.g., in downlink burst 505-b) having M TTIs. The retrigger message may be sent after a nominal response-trigger delay of N 'TTIs (i.e., the retrigger message may be sent in a downlink TTI that occurs N' TTIs after the uplink TTI in which the response message is sent/received). The UE may then respond by sending a second response message, and so on.

The downlink TTIs in the downlink burst 505 with M TTIs may be associated with the same value of N or different values of N and the uplink TTIs in the uplink burst 510 with M ' TTIs may be associated with the same value of N ' or different values of N ', where N + N ' ≧ M + M ' for each HARQ feedback process.

The end portion 520 of the subframe structure 500 may be defined, at least in part, by a subframe truncation parameter. In some examples, the subframe truncation parameter may determine a total number of TTIs (T) in the subframe structure 500, and may (inherently or implicitly) divide the total number of TTIs into an interleaved portion 515 and an end portion 520. In some examples, the value of the subframe truncation parameter may be dynamically determined by the scheduling device. In some examples, the value of the subframe truncation parameter may be based on at least one of: a traffic type (downlink traffic type or uplink traffic type), or a bandwidth of the scheduled device, or a bandwidth associated with traffic for the scheduled device, or a memory constraint (of the scheduling device or the scheduled device), or a packet size (of the downlink traffic or uplink traffic), or an indicated class of service (of the downlink traffic or uplink traffic), or a combination thereof. In some examples, the subframe truncation parameter may be transmitted from the scheduling device to the scheduled device during the subframe structure 500. In some examples, the subframe truncation parameter may be transmitted during a dynamically determined TTI of the subframe structure 500, where the dynamically determined TTI occurs before starting to terminate the subframe structure 500 (e.g., before or at the beginning of the end portion 520). In some examples, the subframe truncation parameter may be transmitted during a predetermined TTI of the subframe structure 500.

In some examples, the value of the subframe truncation parameter may be selected such that the subframe structure 500 has a total number of TTIs (T) that partially extends into an uplink burst having M' TTIs (e.g., one or two TTIs in the uplink burst). When the value of the subframe truncation parameter is selected such that the subframe structure 500 terminates one uplink TTI into an uplink burst having M' TTIs, the last downlink TTI 525 and the last uplink TTI 530 of the subframe structure 500 are assumed to form part of a single transmission mode of the subframe structure 500.

Similar to how HARQ feedback processing may be incorporated into the interlace portion 515 of the subframe structure 500, packet scheduling and HARQ feedback processing may be incorporated into the end portion 520 of the subframe structure 500. However, for response messages triggered in response to trigger messages received during the downlink TTI of the end portion 520 (or received during any downlink TTI for which a response message has not been sent), the trigger-response delay associated with the downlink TTI may be reduced relative to a nominal trigger-response delay (as followed in the interleaved portion 515) to enable transmission of the response message during (or before) the last uplink TTI 530 of the subframe structure 500. The retrigger message may be received in a subsequent subframe structure for a response message transmitted during the end portion 520 (or the last partial burst with an uplink TTI).

In some examples, the trigger message transmitted during the downlink TTI of the end portion 520 may be modified such that the scheduled device may respond with less delay than usual (i.e., less than N TTIs). In some examples, this may be achieved by limiting the packet size of the data transmission included in the trigger message.

In some examples, the parameters (e.g., M, M ', N, and N') of the interleaved portion 515 of the subframe structure 500 may be received by the scheduled device during a pre-configuration of the scheduled device; semi-statically receiving at a frequency less than once per subframe structure while the scheduled device is wirelessly communicating with the scheduling device; or dynamically during each subframe structure (e.g., in the first few TTIs of each subframe structure). In some examples, a plurality of parameters stored at the scheduled device may define a configuration of a default subframe structure, and the scheduling device may dynamically indicate whether a current subframe structure or a next subframe structure follows the configuration of the default subframe structure. In some examples, the default subframe structure may be a parameterized free-standing subframe structure, such as subframe structure 500. In some examples, the plurality of parameters stored at the scheduled device may define two or more subframe structures, such as a parameterized free-standing subframe structure and a single-transmission-mode subframe structure, and the scheduling device may dynamically indicate which of the two or more subframe structures the current subframe structure or the next subframe structure follows.

In some examples, the subframe truncation parameter for subframe structure 500 may be transmitted to (and received by) the scheduled device semi-statically (e.g., for multiple subframe structures) or dynamically (e.g., during subframe structure 500). In some examples, the subframe truncation parameter may be received during a dynamically determined TTI of the subframe structure 500, where the dynamically determined TTI occurs before or at the beginning of the end portion 520 of the subframe structure 500. In other examples, the subframe truncation parameter may be received during a predetermined TTI of the subframe structure 500.

The subframe structure 500 may be configured as a pure interlaced subframe structure or, in some cases, as a single transmission mode subframe structure. For example, a pure interleaved subframe structure may be defined by specifying only the M, M ', N, and N' parameters associated with interleaved portion 515 and either 1) not specifying the subframe truncation parameter or 2) setting the value of the subframe truncation parameter to infinity. A single transmission subframe structure may be defined by setting M' ═ 1 and setting T ≧ M +1 (for any M ≧ 1). Other parameter settings cause the subframe structure 500 to begin to behave like an interleaved subframe structure and eventually towards a single transmission mode subframe structure. For any choice of parameters, the subframe structure 500 is "free-standing" for the total number of its T TTIs, thus preserving the properties of the single-transmission-mode subframe structure.

Parameterized standalone subframe structures may be useful because they provide a common subframe structure in which subframe structures used by LTE/LTE-a devices and Wi-Fi devices may be implemented. The interleaved portion of the subframe structure may enable low switching overhead for medium latency traffic, while the single transmission mode portion of the subframe structure may provide low latency and lower HARQ buffer requirements. Thus, a network (e.g., an LTE/LTE-a network) may start with interleaved portions of a subframe structure while serving large amounts of data with medium data rate and medium latency requirements, but terminate the subframe structure with a single transmission mode portion as soon as low latency traffic (e.g., mission critical data packets, or haptic user experience packets) or very large data packets arrive (destined for a receiver with high throughput, a memory constrained decoder). Following termination of the parameterized self-contained subframe structure, the network may switch to using a single-transmission mode subframe structure until low-latency traffic or very large data packets have been delivered. Subsequently, the network can switch back to a parameterized free-standing subframe structure with interleaved portions of indeterminate duration. In other words, the parameterized self-contained subframe structure may provide a unified framework for catering to highly diverse traffic types and service requirements without requiring changes to the underlying MAC protocol.

Fig. 6 illustrates a block diagram 600 of an apparatus 615 for use in wireless communications, in accordance with various aspects of the disclosure. The apparatus 615 may be an example that describes aspects of one or more of the UEs 115 with reference to fig. 1. The device 615 may also be or include a processor. The apparatus 615 may include a receiver module 610, a wireless communication management module 620, or a transmitter module 630. Each of these modules may be in communication with each other.

The modules of the apparatus 615 may be implemented, individually or collectively, with one or more Application Specific Integrated Circuits (ASICs) adapted to perform some or all of the applicable functions in hardware. Alternatively, the functions may be performed by one or more other processing units (or cores), on one or more integrated circuits. In other examples, other types of integrated circuits (e.g., structured/platform ASICs, Field Programmable Gate Arrays (FPGAs), system on a chip (SoC), or other semi-custom ICs) may be used that may be programmed in any manner known in the art. The functions of each module may also be implemented, in whole or in part, using instructions embodied in a memory, formatted to be executed by one or more general or special purpose processors.

In some examples, the receiver module 610 may include at least one Radio Frequency (RF) receiver. In some examples, the receiver module 610 or RF receiver may be used for LTE/LTE-a communications, Wi-Fi communications, or mesh network communications as described, for example, with reference to fig. 1. The receiver module 610 may be used to receive various types of data or control signals (i.e., transmissions) over one or more communication links of a wireless communication system, such as one or more communication links of the wireless communication system 100 described with reference to fig. 1.

In some examples, the transmitter module 630 may include at least one RF transmitter. In some examples, the transmitter module 630 or RF transmitter may be used for LTE/LTE-a communications, Wi-Fi communications, or mesh network communications as described, for example, with reference to fig. 1. The transmitter module 630 may be used to transmit various types of data or control signals (i.e., transmissions) over one or more communication links of a wireless communication system, such as one or more communication links of the wireless communication system 100 described with reference to fig. 1.

In some examples, the wireless communication management module 620 may be used to manage one or more aspects of wireless communication of the apparatus 615 or a first device comprising the apparatus 615. In some examples, the wireless communication management module 620 may include a subframe structure management module 635. The subframe structure management module 635 may include a subframe structure termination module 640. The subframe structure termination module 640 may include an optional delay rewrite module 645.

In some examples, the subframe structure management module 635 may be configured to wirelessly communicate with a second device (e.g., a scheduling device such as a base station, Wi-Fi access point, or mesh network scheduler) according to a first subframe structure. The first subframe structure may include a first periodic sequence of downlink TTIs and uplink TTIs. The subframe structure management module 635 may also be configured to wirelessly communicate with a second device according to a subsequent subframe structure. For example, subframe structure management module 635 may be configured to wirelessly communicate with a second device according to a second subframe structure associated with a second periodic sequence of TTIs following termination of the first subframe structure. In some examples, the first periodic sequence and the second periodic sequence may be the same periodic sequence. In some examples, one of the first and second periodic sequences may include at least an interleaving portion and the other of the first and second periodic sequences may include a single transmission mode portion. In some examples, both the first and second periodic sequences may include an interlace portion and a single transmission mode portion.

In some examples, the first periodic sequence of downlink TTIs and uplink TTIs may include a repeating sequence of downlink bursts and uplink bursts, where each downlink burst includes a first set of one or more downlink TTIs and each uplink burst includes a second set of one or more uplink TTIs. In some examples, at least some of the uplink and downlink bursts may be separated by a GT interval.

In some examples, each downlink TTI of the first periodic sequence may be associated with a nominal trigger-response delay parameter (N) and/or each uplink TTI of the first periodic sequence may be associated with a nominal response-retrigger delay parameter (N'). The nominal trigger-response delay parameter associated with the downlink TTI may be a periodic function of a TTI index associated with the downlink TTI, and/or the nominal response-retrigger delay parameter associated with the uplink TTI may be a periodic function of a TTI index associated with the uplink TTI.

In some examples, the subframe structure termination module 640 may be to receive a subframe truncation parameter from the second device; and terminating the first subframe structure based at least in part on the subframe truncation parameter. The subframe truncation parameter may be received during, for example, a first subframe structure. In some examples, the subframe truncation parameter may determine a total number of TTIs in the first subframe structure, and may divide the total number of TTIs into an interleaved portion and an end portion. In some examples, the end portion may include a single transmission mode portion.

In some examples, wirelessly communicating with the second device according to the first subframe structure may include: a first trigger message is received from a second device during a first downlink TTI within an interleaved portion of a first subframe structure. Wirelessly communicating with the second device according to the first subframe structure may further include: after receiving the first trigger message, a first response message associated with the first trigger message is sent to the second device. The first response message may be transmitted in an earliest uplink TTI of the first subframe structure that satisfies a nominal trigger-response delay parameter associated with the first downlink TTI. Wirelessly communicating with the second device according to the first subframe structure may further include: a second trigger message is received from the second device during a second downlink TTI within an end portion of the first subframe structure. Further, wirelessly communicating with the second device according to the first subframe structure may include: after receiving the second trigger message, a second response message associated with the second trigger message is sent to the second device. The second response message may be transmitted in the last uplink TTI of the first subframe structure.

In some examples, wirelessly communicating with the second device according to the first subframe structure may include: the first response message is transmitted to the second device during a first uplink TTI within an interleaved portion of the first subframe structure. Wirelessly communicating with the second device according to the first subframe structure may further include: after sending the first response message, a first retrigger message associated with the first response message is received from the second device. The first retrigger message may be received in a downlink TTI of the first subframe structure that satisfies a nominal response-retrigger delay parameter associated with the first uplink TTI. Wirelessly communicating with the second device according to the first subframe structure may further include: transmitting a second response message to the second device during a second uplink TTI in the last tail portion. Further, wirelessly communicating with the second device according to the first subframe structure may include: after sending the second response message, a second re-trigger message is received from the second device. The second retrigger message may be received in a second subframe structure subsequent to the first subframe structure.

In some examples, optional delay rewriting module 645 may be configured to rewrite a nominal trigger-response delay parameter or a nominal response-retrigger delay parameter associated with a TTI of the first subframe structure based at least in part on the subframe truncation parameter. In some examples, rewriting the nominal trigger-response delay parameter may include: the delay indicated by the nominal trigger-response delay parameter is reduced to enable transmission of the response message prior to termination of the first subframe structure.

Fig. 7 illustrates a block diagram 700 of an apparatus 715 for use in wireless communications, in accordance with various aspects of the disclosure. The apparatus 715 may be an example of an aspect of one or more of the UEs 115 described with reference to fig. 1, or an aspect of the apparatus 615 described with reference to fig. 6. The apparatus 715 may also be or include a processor. The apparatus 715 may include a receiver module 710, a wireless communication management module 720, or a transmitter module 730. Each of these modules may be in communication with each other.

The modules of the apparatus 715 may be implemented, individually or collectively, with one or more ASICs adapted to perform some or all of the applicable functions in hardware. Alternatively, the functions may be performed by one or more other processing units (or cores), on one or more integrated circuits. In other examples, other types of integrated circuits (e.g., structured/platform ASICs, FPGAs, socs, or other semi-custom ICs) may be used that may be programmed in any manner known in the art. The functions of each module may also be implemented, in whole or in part, using instructions embodied in a memory, formatted to be executed by one or more general or special purpose processors.

In some examples, receiver module 710 may include at least one RF receiver. In some examples, receiver module 710 or RF receiver may be used for LTE/LTE-a communications, Wi-Fi communications, or mesh network communications as described, for example, with reference to fig. 1. The receiver module 710 may be used to receive various types of data or control signals (i.e., transmissions) over one or more communication links of a wireless communication system, such as one or more communication links of the wireless communication system 100 described with reference to fig. 1.

In some examples, transmitter module 730 may include at least one RF transmitter. In some examples, the transmitter module 730 or RF transmitter may be used for LTE/LTE-a communications, Wi-Fi communications, or mesh network communications as described, for example, with reference to fig. 1. The transmitter module 730 may be used to transmit various types of data or control signals (i.e., transmissions) over one or more communication links of a wireless communication system, such as one or more communication links of the wireless communication system 100 described with reference to fig. 1.

In some examples, the wireless communication management module 720 may be used to manage one or more aspects of wireless communication of the apparatus 715 or a first device comprising the apparatus 715. In some examples, the wireless communication management module 720 may include a subframe structure management module 735. The subframe structure management module 735 may include a subframe structure parameter management module 750, a subframe structure type determination module 755, or a subframe structure termination module 740.

The subframe structure parameter management module 750 may be used to receive and optionally store a plurality of parameters related to one or more subframe structures. In some examples, a parameter of the plurality of parameters may be received or stored during a pre-configuration of the first device; semi-statically received or stored at a frequency less than once per subframe structure while a first device wirelessly communicates with a second device (e.g., a scheduling device such as a base station, Wi-Fi access point, or mesh network scheduler); or dynamically received or stored during each subframe structure. In some examples, the plurality of parameters may define a configuration of a default subframe structure. In some examples, the plurality of parameters may define two or more subframe structures. In some examples, the plurality of parameters may define a portion of a subframe structure (e.g., an interleaved portion of the subframe structure).

In some examples, the plurality of parameters may be received from the second device and may include at least one of: a number of TTIs in a downlink burst (M), or a number of TTIs in an uplink burst (M '), or a nominal trigger-response delay parameter (N), or a nominal response-retrigger delay parameter (N'), or a combination thereof. In some examples, a parameter of the plurality of parameters may be received semi-statically at a frequency less than once per subframe structure or dynamically at the beginning of each subframe structure.

The subframe structure management module 735 may be configured to wirelessly communicate with a second device according to a first subframe structure. The first subframe structure may include a first periodic sequence of downlink TTIs and uplink TTIs.

The subframe structure type determination module 755 may be configured to receive a signal (e.g., a bit) indicating a type of the first subframe structure. In some examples, a signal may be received at a beginning of the first subframe structure, the signal indicating which of the two or more subframe structures is used for the first subframe structure. In some examples, a bit may be received at the beginning of the first subframe structure indicating whether the first subframe structure follows the configuration of the default subframe structure or the configuration of the predefined single transmission mode subframe structure.

The subframe structure termination module 740 may be configured to receive a subframe truncation parameter from the second device. The subframe truncation parameter may be received, for example, during a first subframe structure. In some examples, the subframe truncation parameter may be received during a dynamically determined TTI of the first subframe structure, wherein the dynamically determined TTI occurs before beginning to terminate the first subframe structure. In some examples, the subframe truncation parameter may be received during a predetermined TTI of the first subframe structure.

In some examples, the subframe truncation parameter may determine a total number of TTIs in the first subframe structure, and may divide the total number of TTIs into an interleaved portion and an end portion. In some examples, the end portion may include a single transmission mode portion.

Fig. 8 illustrates a block diagram 800 of an apparatus 815 for use in wireless communications, in accordance with various aspects of the disclosure. The apparatus 815 may be an example of an aspect of one or more of the UEs 115 described with reference to fig. 1, or an aspect of the

apparatus

615 or 715 described with reference to fig. 6 or 7. The apparatus 815 may also be or include a processor. The apparatus 815 may include a receiver module 810, a wireless communication management module 820, or a transmitter module 830. Each of these modules may be in communication with each other.

The modules of the apparatus 815 may be implemented individually or collectively using one or more ASICs adapted to perform some or all of the applicable functions in hardware. Alternatively, the functions may be performed by one or more other processing units (or cores), on one or more integrated circuits. In other examples, other types of integrated circuits (e.g., structured/platform ASICs, FPGAs, socs, or other semi-custom ICs) may be used that may be programmed in any manner known in the art. The functions of each module may also be implemented, in whole or in part, using instructions embodied in a memory, formatted to be executed by one or more general or special purpose processors.

In some examples, the receiver module 810 may include at least one RF receiver. In some examples, the receiver module 810 or RF receiver may be used for LTE/LTE-a communications, Wi-Fi communications, or mesh network communications as described, for example, with reference to fig. 1. The receiver module 810 may be used to receive various types of data or control signals (i.e., transmissions) over one or more communication links of a wireless communication system, such as one or more communication links of the wireless communication system 100 described with reference to fig. 1.

In some examples, transmitter module 830 may include at least one RF transmitter. In some examples, the transmitter module 830 or RF transmitter may be used for LTE/LTE-a communications, Wi-Fi communications, or mesh network communications as described, for example, with reference to fig. 1. The transmitter module 830 may be used to transmit various types of data or control signals (i.e., transmissions) over one or more communication links of a wireless communication system, such as one or more communication links of the wireless communication system 100 described with reference to fig. 1.

In some examples, the wireless communication management module 820 may be used to manage one or more aspects of wireless communication of the apparatus 815 or a first device comprising the apparatus 815. In some examples, the wireless communication management module 820 may include a subframe structure management module 835. The subframe structure management module 835 may include an optional subframe structure parameter management module 840 or a delay reduction module 845.

The subframe structure parameter management module 840 may be configured to receive and optionally store a plurality of parameters associated with one or more subframe structures. In some examples, a parameter of the plurality of parameters may be received or stored during a pre-configuration of the first device; semi-statically received or stored at a frequency less than once per subframe structure while a first device wirelessly communicates with a second device (e.g., a scheduling device such as a base station, Wi-Fi access point, or mesh network scheduler); or dynamically received or stored during each subframe structure. In some examples, the plurality of parameters may define a configuration of a default subframe structure. In some examples, the plurality of parameters may define two or more subframe structures. In some examples, the plurality of parameters may define a portion of a subframe structure (e.g., an interleaved portion of the subframe structure).

The subframe structure management module 835 may be used to wirelessly communicate with a second device according to a parameterized self-contained subframe structure having an interlace portion and a tail portion. In some examples, the end portion may include a single transmission mode portion. The first subframe structure may include a periodic sequence of downlink TTIs and uplink TTIs.

In some examples, the subframe structure may include a sequence of downlink bursts and uplink bursts, where each downlink burst includes a first set of one or more downlink TTIs and each uplink burst includes a second set of one or more uplink TTIs. In some examples, at least some of the uplink and downlink bursts may be separated by a GT interval.

In some examples, each downlink TTI of the first subframe structure may be associated with a nominal trigger-response delay parameter (N) and/or each uplink TTI of the first subframe structure may be associated with a nominal response-retrigger delay parameter (N'). The nominal trigger-response delay parameter associated with the downlink TTI may be a periodic function of a TTI index associated with the downlink TTI, and/or the nominal response-retrigger delay parameter associated with the uplink TTI may be a periodic function of a TTI index associated with the uplink TTI.

The delay reduction module 845 can be configured to reduce a delay indicated by a nominal trigger-response delay parameter associated with a downlink TTI of the subframe structure to enable transmission of a response message corresponding to the downlink TTI during an end portion and prior to termination of the subframe structure.

In some examples, aspects of two or more of the

devices

615, 715, or 815 described with reference to fig. 6, 7, or 8 may be combined.

Fig. 9 illustrates a block diagram 900 of an apparatus 905 for use in wireless communications, in accordance with various aspects of the disclosure. The apparatus 905 may be an example of aspects of one or more of the scheduling devices (e.g., base station 105, Wi-Fi access point 135, or mesh network scheduler) described with reference to fig. 1. The apparatus 905 may also be or include a processor. The apparatus 905 may include a receiver module 910, a wireless communication management module 920, or a transmitter module 930. Each of these modules may be in communication with each other.

The modules of the apparatus 905 may be implemented individually or collectively using one or more ASICs adapted to perform some or all of the applicable functions in hardware. Alternatively, the functions may be performed by one or more other processing units (or cores), on one or more integrated circuits. In other examples, other types of integrated circuits (e.g., structured/platform ASICs, FPGAs, socs, or other semi-custom ICs) may be used that may be programmed in any manner known in the art. The functions of each module may also be implemented, in whole or in part, using instructions embodied in a memory, formatted to be executed by one or more general or special purpose processors.

In some examples, the receiver module 910 may include at least one RF receiver. In some examples, receiver module 910 or RF receiver may be used for LTE/LTE-a communications, Wi-Fi communications, or mesh network communications as described, for example, with reference to fig. 1. The receiver module 910 may be used to receive various types of data or control signals (i.e., transmissions) over one or more communication links of a wireless communication system, such as one or more communication links of the wireless communication system 100 described with reference to fig. 1.

In some examples, the transmitter module 930 may include at least one RF transmitter. In some examples, the transmitter module 930 or RF transmitter may be used for LTE/LTE-a communications, Wi-Fi communications, or mesh network communications as described, for example, with reference to fig. 1. The transmitter module 930 may be used to transmit various types of data or control signals (i.e., transmissions) over one or more communication links of a wireless communication system, such as one or more communication links of the wireless communication system 100 described with reference to fig. 1.

In some examples, the wireless communication management module 920 may be used to manage one or more aspects of wireless communication of the apparatus 905 or a second device comprising the apparatus 905. In some examples, the wireless communication management module 920 may include a subframe structure management module 935. The subframe structure management module 935 may include a subframe structure termination module 940. The subframe structure termination module 940 may include an optional accelerated response processing module 945.

The subframe structure management module 935 may be used to wirelessly communicate with a first device (e.g., a UE) according to a first subframe structure. The first subframe structure may include a first periodic sequence of downlink TTIs and uplink TTIs. The subframe structure management module 935 may also be used to wirelessly communicate with the first device according to a subsequent subframe structure. For example, the subframe structure management module 935 may be to wirelessly communicate with the first device according to a second subframe structure associated with a second periodic sequence of TTIs following termination of the first subframe structure. In some examples, the first periodic sequence and the second periodic sequence may be the same periodic sequence. In some examples, one of the first and second periodic sequences may include at least an interleaving portion and the other of the first and second periodic sequences may include a single transmission mode portion. In some examples, both the first and second periodic sequences may include an interlace portion and a single transmission mode portion.

The subframe structure termination module 940 may be configured to transmit the subframe truncation parameter to the first device. The subframe truncation parameter may be transmitted, for example, during a first subframe structure. In some examples, the subframe truncation parameter may determine a total number of TTIs in the first subframe structure, and may divide the total number of TTIs into an interleaved portion and an end portion. In some examples, the end portion may include a single transmission mode portion. The subframe structure termination module 940 may also be for terminating the first subframe structure based at least in part on the subframe truncation parameter.

In some examples, wirelessly communicating with the first device according to the first subframe structure may include: a first trigger message is transmitted to the first device during a first downlink TTI within an interleaved portion of a first subframe structure. Wirelessly communicating with the first device according to the first subframe structure may further include: after sending the first trigger message, a first response message associated with the first trigger message is received from the first device. The first response message may be received in an earliest uplink TTI of the first subframe structure that satisfies a nominal trigger-response delay parameter associated with the first downlink TTI. Wirelessly communicating with the first device according to the first subframe structure may further include: transmitting a second trigger message to the first device during a second downlink TTI within an end portion of the first subframe structure. Further, wirelessly communicating with the second device according to the first subframe structure may include: after sending the second trigger message, a second response message associated with the second trigger message is sent from the first device. The second response message may be received in a last uplink TTI of the first subframe structure.

In some examples, wirelessly communicating with the first device according to the first subframe structure may include: a first response message is received from the first device during a first downlink TTI within the interleaved portion of the first subframe structure. Wirelessly communicating with the first device according to the first subframe structure may further include: after receiving the first response message, a first retrigger message associated with the first response message is sent to the first device. The first retrigger message may be sent in a downlink TTI of the first subframe structure that satisfies a nominal response-retrigger delay parameter associated with the first uplink TTI. Wirelessly communicating with the first device according to the first subframe structure may further include: receiving a second response message from the first device during a second uplink TTI in the last tail portion. Further, wirelessly communicating with the first device according to the first subframe structure may include: after receiving the second response message, a second re-trigger message is sent to the first device. The second retrigger message may be transmitted in a second subframe structure subsequent to the first subframe structure.

The optional accelerated response processing module 945 may be configured to receive, prior to terminating the first subframe structure, a transmission of a response message associated with a trigger message transmitted during a TTI of the first subframe structure, wherein the response message is received with a first trigger-response delay that is reduced compared to a second trigger-response delay indicated by a nominal trigger-response delay parameter associated with the TTI.

Fig. 10 illustrates a block diagram 1000 of an apparatus 1005 for use in wireless communications, in accordance with various aspects of the disclosure. The apparatus 1005 may be an example of aspects of one or more of the scheduling devices described with reference to fig. 1 (e.g., the base station 105, the Wi-Fi access point 135, or the mesh network scheduler), or aspects of the apparatus 905 described with reference to fig. 9. The apparatus 1005 may also be or include a processor. The apparatus 1005 may include a receiver module 1010, a wireless communication management module 1020, or a transmitter module 1030. Each of these modules may be in communication with each other.

The modules of the apparatus 1005 may be implemented, individually or collectively, with one or more ASICs adapted to perform some or all of the applicable functions in hardware. Alternatively, the functions may be performed by one or more other processing units (or cores), on one or more integrated circuits. In other examples, other types of integrated circuits (e.g., structured/platform ASICs, FPGAs, socs, or other semi-custom ICs) may be used that may be programmed in any manner known in the art. The functions of each module may also be implemented, in whole or in part, using instructions embodied in a memory, formatted to be executed by one or more general or special purpose processors.

In some examples, the receiver module 1010 may include at least one RF receiver. In some examples, the receiver module 1010 or RF receiver may be used for LTE/LTE-a communications, Wi-Fi communications, or mesh network communications as described, for example, with reference to fig. 1. The receiver module 1010 may be used to receive various types of data or control signals (i.e., transmissions) over one or more communication links of a wireless communication system, such as one or more communication links of the wireless communication system 100 described with reference to fig. 1.

In some examples, transmitter module 1030 may include at least one RF transmitter. In some examples, the transmitter module 1030 or RF transmitter may be used for LTE/LTE-a communications, Wi-Fi communications, or mesh network communications as described, for example, with reference to fig. 1. The transmitter module 1030 may be used to transmit various types of data or control signals (i.e., transmissions) over one or more communication links of a wireless communication system, such as one or more communication links of the wireless communication system 100 described with reference to fig. 1.

In some examples, wireless communication management module 1020 may be used to manage one or more aspects of wireless communication of apparatus 1005 or a second device comprising apparatus 1005. In some examples, the wireless communication management module 1020 may include a subframe structure management module 1035. The subframe structure management module 1035 may include a subframe structure parameter notification module 1050, a subframe structure type notification module 1055, or a subframe structure termination module 1040. The subframe structure termination module 1040 may include a subframe truncation parameter determination module 1060.

The subframe structure parameter notification module 1050 may be used to transmit a plurality of parameters related to one or more subframe structures. In some examples, a parameter of the plurality of parameters may be transmitted semi-statically at a frequency less than once per subframe structure when the second device is communicating wirelessly with the first device (e.g., a UE); or dynamically transmitted during each subframe structure. In some examples, the plurality of parameters may define a configuration of a default subframe structure. In some examples, the plurality of parameters may define two or more subframe structures. In some examples, the plurality of parameters may define a portion of a subframe structure (e.g., an interleaved portion of the subframe structure).

In some examples, the plurality of parameters may include at least one of: a number of TTIs in a downlink burst (M), or a number of TTIs in an uplink burst (M '), or a nominal trigger-response delay parameter (N), or a nominal response-retrigger delay parameter (N'), or a combination thereof. In some examples, a parameter of the plurality of parameters may be received semi-statically at a frequency less than once per subframe structure or dynamically at the beginning of each subframe structure.

The subframe structure management module 1035 may be for wirelessly communicating with the first device according to the first subframe structure. The first subframe structure may include a first periodic sequence of downlink TTIs and uplink TTIs.

The subframe structure type notification module 1055 may be configured to transmit a signal (e.g., bits) indicating the type of the first subframe structure. In some examples, a signal may be transmitted at the beginning of the first subframe structure indicating which of two or more subframe structures to use for the first subframe structure. In some examples, a bit may be transmitted at the beginning of the first subframe structure indicating whether the first subframe structure follows the configuration of the default subframe structure or the configuration of the predefined single transmission mode subframe structure.

The subframe truncation parameter determination module 1060 may be used to dynamically determine the value of the subframe truncation parameter. In some examples, the value of the subframe truncation parameter may be based on at least one of: a traffic type, or a first bandwidth of the first device, or a second bandwidth associated with traffic for the first device, or a memory constraint, or a packet size, or an indicated class of service, or a combination thereof.

The subframe structure termination module 1040 may be configured to transmit the subframe truncation parameter to the first device. The subframe truncation parameter may be transmitted, for example, during a first subframe structure. In some examples, the subframe truncation parameter may be transmitted during a dynamically determined TTI of the first subframe structure, wherein the dynamically determined TTI occurs before beginning to terminate the first subframe structure. In some examples, the subframe truncation parameter may be transmitted during a predetermined TTI of the first subframe structure. In some examples, the subframe truncation parameter may determine a total number of TTIs in the first subframe structure, and may divide the total number of TTIs into an interleaved portion and an end portion. In some examples, the end portion may include a single transmission mode portion. The subframe structure termination module 1040 may also be configured to terminate the first subframe structure based at least in part on the subframe truncation parameter.

Fig. 11 illustrates a block diagram 1100 of an apparatus 1105 for use in wireless communications, in accordance with various aspects of the disclosure. The apparatus 1105 may be an example of an aspect of one or more of the scheduling devices (e.g., the base station 105, the Wi-Fi access point 135, or the mesh network scheduler) described with reference to fig. 1, or an aspect of the

apparatus

905 or 1005 described with reference to fig. 9 or 10. The apparatus 1105 may also be or include a processor. The apparatus 1105 may include a receiver module 1110, a wireless communication management module 1120, or a transmitter module 1130. Each of these modules may be in communication with each other.

The modules of the apparatus 1105 may be implemented, individually or collectively, with one or more ASICs adapted to perform some or all of the applicable functions in hardware. Alternatively, the functions may be performed by one or more other processing units (or cores), on one or more integrated circuits. In other examples, other types of integrated circuits (e.g., structured/platform ASICs, FPGAs, socs, or other semi-custom ICs) may be used that may be programmed in any manner known in the art. The functions of each module may also be implemented, in whole or in part, using instructions embodied in a memory, formatted to be executed by one or more general or special purpose processors.

In some examples, receiver module 1110 may include at least one RF receiver. In some examples, the receiver module 1110 or RF receiver may be used for LTE/LTE-a communications, Wi-Fi communications, or mesh network communications as described, for example, with reference to fig. 1. The receiver module 1110 may be used to receive various types of data or control signals (i.e., transmissions) over one or more communication links of a wireless communication system, such as one or more communication links of the wireless communication system 100 described with reference to fig. 1.

In some examples, the transmitter module 1130 may include at least one RF transmitter. In some examples, the transmitter module 1130 or RF transmitter may be used for LTE/LTE-a communications, Wi-Fi communications, or mesh network communications as described, for example, with reference to fig. 1. The transmitter module 1130 may be used to transmit various types of data or control signals (i.e., transmissions) over one or more communication links of a wireless communication system, such as one or more communication links of the wireless communication system 100 described with reference to fig. 1.

In some examples, the wireless communication management module 1120 may be for managing one or more aspects of wireless communication of the apparatus 1105 or a second device comprising the apparatus 1105. In some examples, the wireless communication management module 1120 may include a subframe structure management module 1135. The subframe structure management module 1135 may include an optional subframe structure parameter notification module 1140 or an accelerated response processing module 1145.

The subframe structure parameter notification module 1140 may be configured to transmit a plurality of parameters associated with one or more subframe structures. In some examples, a parameter of the plurality of parameters may be transmitted semi-statically at a frequency less than once per subframe when the second device is communicating wirelessly with the first device (e.g., UE); or dynamically transmitted during each subframe structure. In some examples, the plurality of parameters may define a configuration of a default subframe structure. In some examples, the plurality of parameters may define two or more subframe structures. In some examples, the plurality of parameters may define a portion of a subframe structure (e.g., an interleaved portion of the subframe structure).

In some examples, the plurality of parameters may include at least one of: a number of TTIs in a downlink burst (M), or a number of TTIs in an uplink burst (M '), or a nominal trigger-response delay parameter (N), or a nominal response-retrigger delay parameter (N'), or a combination thereof. In some examples, a parameter of the plurality of parameters may be transmitted semi-statically at a frequency less than once per subframe structure or dynamically at the beginning of each subframe structure.

The subframe structure management module 1135 may be for wirelessly communicating with a first device according to a parameterized self-contained subframe structure having an interlace portion and a tail portion. In some examples, the end portion may include a single transmission mode portion. The first subframe structure may include a periodic sequence of downlink TTIs and uplink TTIs.

In some examples, each downlink TTI of the subframe structure may be associated with a nominal trigger-response delay parameter (N) and/or each uplink TTI of the subframe structure may be associated with a nominal response-retrigger delay parameter (N'). The nominal trigger-response delay parameter associated with the downlink TTI may be a periodic function of a TTI index associated with the downlink TTI, and/or the nominal response-retrigger delay parameter associated with the uplink TTI may be a periodic function of a TTI index associated with the uplink TTI.

The accelerated response processing module 1145 may be for receiving, during the end portion and prior to termination of the subframe structure, a transmission of a response message corresponding to a downlink TTI of the subframe structure, wherein the response message is received with a first trigger-response delay that is reduced compared to a second trigger-response delay indicated by a nominal trigger-response delay parameter associated with the downlink TTI.

In some examples, aspects of two or more of the

apparatuses

905, 1005, or 1115 described with reference to fig. 9, 10, or 11 may be combined.

Fig. 12 illustrates a block diagram 1200 of a UE 1215 for use in wireless communications, in accordance with various aspects of the disclosure. The UE 1215 may have multiple configurations and may be included in or part of: personal computers (e.g., laptop computers, netbook computers, tablet computers, etc.), cellular telephones, PDAs, Digital Video Recorders (DVRs), internet appliances, game consoles, e-readers, and the like. In some examples, the UE 1215 may have an internal power source (not shown), such as a small battery, to facilitate mobile operation. In some examples, the UE 1215 may be an example of an aspect of one or more of the UEs 115 described with reference to fig. 1, or an aspect of one or more of the

apparatuses

615, 715, or 815 described with reference to fig. 6, 7, or 8. The UE 1215 may be configured to implement at least some of the UE or device features and functions described with reference to fig. 1, 2, 3, 4, 5, 6, 7, or 8.

The UE 1215 may include a UE processor module 1210, a UE memory module 1220, at least one UE transceiver module (represented by UE transceiver module 1230), at least one UE antenna (represented by UE antenna 1240), or a UE wireless communications management module 1250. Each of these components may communicate with each other, directly or indirectly, over one or more buses 1235.

The UE memory module 1220 may include Random Access Memory (RAM) or Read Only Memory (ROM). The UE memory module 1220 may store computer-readable, computer-executable code 1225 containing instructions configured to, when executed, cause the UE processor module 1210 to perform various functions described herein related to wireless communication, including communicating with another device using a subframe structure terminated based at least in part on a subframe truncation parameter and/or communicating with another device using a parameterized self-contained subframe structure having an interlace portion and an end portion. Alternatively, the code 1225 may not be executed directly by the UE processor module 1210, but may be configured (e.g., when compiled and executed) to cause the UE 1215 to perform various functions described herein.

The UE processor module 1210 may include intelligent hardware devices (e.g., Central Processing Unit (CPU), microcontroller, ASIC, etc.). The UE processor module 1210 may process information received through the UE transceiver module 1230 or information to be sent to the UE transceiver module 1230 for transmission through the UE antennas 1240. The UE processor module 1210 may handle various aspects of communicating over (or managing communications over) the radio frequency spectrum, either alone or in conjunction with the UE wireless communication management module 1250.

The UE transceiver module 1230 may include a modem configured to modulate packets and provide the modulated packets to the UE antennas 1240 for transmission, and demodulate packets received from the UE antennas 1240. In some examples, UE transceiver module 1230 may be implemented as one or more UE transmitter modules and one or more separate UE receiver modules. The UE transceiver module 1230 may be configured to bidirectionally communicate with one or more of the

base stations

105, 205, or 205-a described with reference to fig. 1 or 2, or one or more of the

apparatuses

905, 1005, or 1105 described with reference to fig. 9, 10, or 11 via the UE antenna 1240. While the UE 1215 may include a single UE antenna, there may be examples where the UE 1215 may include multiple UE antennas 1240.

The UE wireless communication management module 1250 may be configured to perform or control some or all of the UE or device features or functions related to wireless communication over the radio frequency spectrum described with reference to fig. 1, 2, 3, 4, 5, 6, 7, or 8. The UE wireless communication management module 1250, or a portion thereof, may include a processor, or some or all of the functionality of the UE wireless communication management module 1250 may be performed by or in conjunction with the UE processor module 1210. In some examples, UE wireless communication management module 1250 may be an example of wireless

communication management module

620, 720, or 820 described with reference to fig. 6, 7, or 8.

Fig. 13 illustrates a block diagram 1300 of a base station 1305 (e.g., a base station forming part or all of an eNB) for use in wireless communications, in accordance with various aspects of the disclosure. In some examples, the base station 1305 may be an example of an aspect of one or more of the base stations 105 described with reference to fig. 1, or an aspect of one or more of the

apparatuses

905, 1005, or 1105 described with reference to fig. 9, 10, or 11. The base station 1305 may be configured to implement or facilitate at least some of the base station features and functions described with reference to fig. 1, 2, 3, 4, 5, 9, 10, or 11.

The base station 1305 may include a base station processor module 1310, a base station memory module 1320, at least one base station transceiver module (represented by base station transceiver module 1350), at least one base station antenna (represented by base station antenna 1355), or a base station wireless communication management module 1360. The base station 1305 may also include one or more of a base station communications module 1330 or a network communications module 1340. Each of these components may communicate with each other, directly or indirectly, over one or more buses 1335.

The base station memory module 1320 may include RAM or ROM. The base station memory module 1320 may store computer-readable, computer-executable code 1325 containing instructions configured to, when executed, cause the base station processor module 1310 to perform various functions described herein related to wireless communication, including communicating with another device using a subframe structure terminated based at least in part on a subframe truncation parameter and/or communicating with another device using a parameterized self-contained subframe structure having an interlace portion and a tail portion. Alternatively, the code 1325 may not be directly executable by the base station processor module 1310, but may be configured to cause the base station 1305 to perform various functions described herein (e.g., when compiled and executed).

The base station processor module 1310 may include intelligent hardware devices (e.g., CPU, microcontroller, ASIC, etc.). The base station processor module 1310 may process information received through the base transceiver module 1350, the base station communication module 1330, or the network communication module 1340. The base station processor module 1310 may also process information to be sent to the transceiver module 1350 for transmission by the base station antenna 1355, to the base station communications module 1330 for transmission to one or more other base stations 1305-a and 1305-b, or to the network communications module 1340 for transmission to the core network 1345 (which may be an example of one or more aspects of the core network 130 described with reference to fig. 1). The base station processor module 1310 may handle various aspects of communicating over (or managing communications over) the radio frequency spectrum, alone or in conjunction with the base station wireless communication management module 1360.

Base station transceiver module 1350 may include a modem configured to modulate packets and provide the modulated packets to base station antenna 1355 for transmission, and demodulate packets received from base station antenna 1355. In some examples, base station transceiver module 1350 may be implemented as one or more base station transmitter modules and one or more separate base station receiver modules. The base station transceiver module 1350 may be configured to bidirectionally communicate with one or more UEs or devices, such as one or more of the

UEs

115 or 1215 described with reference to fig. 1 or 2, or one or more of the

devices

615, 715, or 815 described with reference to fig. 6, 7, or 8, via the antennas 1355. The base station 1305 may, for example, include multiple base station antennas 1355 (e.g., an antenna array). The base station 1305 may communicate with a core network 1345 through a network communication module 1340. Base station 1305 may also communicate with other base stations, such as base stations 1305-a and 1305-b, using a base station communication module 1330.

The base station wireless communication management module 1360 may be configured to perform or control some or all of the features or functions described with reference to fig. 1, 2, 3, 4, 5, 9, 10, or 11 relating to wireless communication over the radio frequency spectrum. The base station wireless communication management module 1360, or portions thereof, may include a processor, or some or all of the functions of the base station wireless communication management module 1360 may be performed by or in conjunction with the base station processor module 1310. In some examples, the base station wireless communication management module 1360 may be an example of the wireless

communication management module

920, 1020, or 1120 described with reference to fig. 9, 10, or 11.

Fig. 14 is a flow diagram illustrating an example method 1400 of wireless communication at a first device in accordance with various aspects of the disclosure. For clarity, the method 1400 is described below with reference to aspects having one or more of the

UEs

115 or 1215 described with reference to fig. 1 or 12, or aspects of one or more of the

apparatuses

615, 715, or 815 described with reference to fig. 6, 7, or 8. In some examples, a UE or apparatus may execute one or more sets of codes to control the functional elements of the UE or apparatus to perform the functions described below. Additionally or alternatively, the UE or device may use dedicated hardware to perform one or more of the functions described below.

At block 1405, the method 1400 may include: wirelessly communicating with a second device (e.g., a scheduling device such as a base station, Wi-Fi access point, or mesh network scheduler) according to a first subframe structure. The first subframe structure may include a first periodic sequence of downlink TTIs and uplink TTIs. The operations at block 1405 may be performed using the wireless

communication management module

620, 720, 820, or 1250 described with reference to fig. 6, 7, 8, or 12, or the subframe

structure management module

635 or 735 described with reference to fig. 6 or 7.

At block 1410, the method 1400 may include: a subframe truncation parameter is received from the second device. The subframe truncation parameter may be received during, for example, a first subframe structure. The operations at block 1410 may be performed using the wireless

communication management module

structure termination module

640 or 740 described with reference to fig. 6 or 7.

In some examples, wirelessly communicating with the second device according to the first subframe structure may include: the first response message is transmitted to the second device during a first uplink TTI within an interleaved portion of the first subframe structure. Wirelessly communicating with the second device according to the first subframe structure may further include: after sending the first response message, a first retrigger message associated with the first response message is received from the second device. The first retrigger message may be received in a downlink TTI of the first subframe structure that satisfies a nominal response-retrigger delay parameter associated with the first uplink TTI. Wirelessly communicating with the second device according to the first subframe structure may further include: receiving a second response message to the second device during a second uplink TTI in the last tail portion. Further, wirelessly communicating with the second device according to the first subframe structure may include: after sending the second response message, a second re-trigger message is received from the second device. The second retrigger message may be received in a second subframe structure subsequent to the first subframe structure.

At block 1415, the method 1400 may include: rewriting a nominal trigger-response delay parameter or a nominal response-retrigger delay parameter associated with a TTI of the first subframe structure based, at least in part, on the subframe truncation parameter. In some examples, rewriting the nominal trigger-response delay parameter may include: the delay indicated by the nominal trigger-response delay parameter is reduced to enable transmission of the response message prior to termination of the first subframe structure. The operations at block 1415 may be performed using the wireless

communication management module

620, 720, 820, or 1250 described with reference to fig. 6, 7, 8, or 12, or the latency rewriting module 645 or 745 described with reference to fig. 6 or 7.

At block 1420, the method 1400 may include: terminating the first subframe structure based at least in part on the subframe truncation parameter. The operations at block 1420 may be performed using the wireless

communication management module

structure termination module

640 or 740 described with reference to fig. 6 or 7.

At block 1425, the method 1400 may optionally include: following termination of the first subframe structure, wirelessly communicating with a second device according to a second subframe structure associated with a second periodic sequence of TTIs. In some examples, the first periodic sequence and the second periodic sequence may be the same periodic sequence. In some examples, one of the first and second periodic sequences may include at least an interleaving portion and the other of the first and second periodic sequences may include a single transmission mode portion. In some examples, both the first and second periodic sequences may include an interlace portion and a single transmission mode portion. The operations at block 1425 may be performed using the wireless

communication management module

structure management module

635 or 735 described with reference to fig. 6 or 7.

Thus, the method 1400 may provide wireless communication. It should be noted that the method 1400 is merely one implementation and that the operations of the method 1400 may be rearranged or otherwise modified such that other implementations are possible.

Fig. 15 is a flow diagram illustrating an example method 1500 of wireless communication at a first device in accordance with various aspects of the disclosure. For clarity, the method 1500 is described below with reference to aspects having one or more of the

UEs

apparatuses

At block 1505, the method 1500 may include: a plurality of parameters related to one or more subframe structures are received, and at block 1510, the method 1500 may optionally include: a plurality of parameters are stored. In some examples, a parameter of the plurality of parameters may be received or stored during a pre-configuration of the first device; semi-statically received or stored at a frequency less than once per subframe structure while a first device wirelessly communicates with a second device (e.g., a scheduling device such as a base station, Wi-Fi access point, or mesh network scheduler); or dynamically received or stored during each subframe structure. In some examples, the plurality of parameters may define a configuration of a default subframe structure. In some examples, the plurality of parameters may define two or more subframe structures. In some examples, the plurality of parameters may define a portion of a subframe structure (e.g., an interleaved portion of the subframe structure).

The operations at

blocks

1505 or 1510 may be performed using the wireless

communication management module

620, 720, 820, or 1250 described with reference to fig. 6, 7, 8, or 12, or the subframe structure parameter management module 750 described with reference to fig. 7.

At block 1515, the method 1500 may include: wirelessly communicating with a second device according to a first subframe structure. The first subframe structure may include a first periodic sequence of downlink TTIs and uplink TTIs. The operations at block 1515 may be performed using the wireless

communication management module

structure management module

635 or 735 described with reference to fig. 6 or 7.

At block 1520, the method 1500 may include: a signal (e.g., a bit) indicating a type of the first subframe structure is received. In some examples, a signal may be received at a beginning of the first subframe structure, the signal indicating which of the two or more subframe structures is used for the first subframe structure. In some examples, a bit may be received at the beginning of the first subframe structure indicating whether the first subframe structure follows the configuration of the default subframe structure or the configuration of the predefined single transmission mode subframe structure. The operations at block 1520 may be performed using the wireless

communication management module

620, 720, 820, or 1250 described with reference to fig. 6, 7, 8, or 12, or the subframe structure type determination module 755 described with reference to fig. 7.

At block 1525, the method 1500 may include: a subframe truncation parameter is received from the second device. The subframe truncation parameter may be received, for example, during a first subframe structure. In some examples, the subframe truncation parameter may be received during a dynamically determined TTI of the first subframe structure, wherein the dynamically determined TTI occurs before beginning to terminate the first subframe structure. In some examples, the subframe truncation parameter may be received during a predetermined TTI of the first subframe structure. The operations at block 1525 may be performed using the wireless

communication management module

structure termination module

640 or 740 described with reference to fig. 6 or 7.

At block 1530, the method 1500 may include: terminating the first subframe structure based at least in part on the subframe truncation parameter. The operations at block 1530 may be performed using the wireless

communication management module

structure termination module

640 or 740 described with reference to fig. 6 or 7.

Thus, the method 1500 may provide wireless communication. It should be noted that the method 1500 is only one implementation and that the operations of the method 1500 may be rearranged or otherwise modified such that other implementations are possible.

Fig. 16 is a flow diagram illustrating an example method 1600 of wireless communication at a first device in accordance with various aspects of the disclosure. For clarity, the method 1600 is described below with reference to aspects having one or more of the

UEs

apparatuses

At block 1605, method 1600 may optionally include: a plurality of parameters related to one or more subframe structures are received, and at block 1610, the method 1600 may optionally include: a plurality of parameters are stored. In some examples, a parameter of the plurality of parameters may be received or stored during a pre-configuration of the first device; semi-statically received or stored at a frequency less than once per subframe structure while a first device wirelessly communicates with a second device (e.g., a scheduling device such as a base station, Wi-Fi access point, or mesh network scheduler); or dynamically received or stored during each subframe structure. In some examples, the plurality of parameters may define a configuration of a default subframe structure. In some examples, the plurality of parameters may define two or more subframe structures. In some examples, the plurality of parameters may define a portion of a subframe structure (e.g., an interleaved portion of the subframe structure).

The operations at

block

1605 or 1610 may be performed using the wireless

communication management module

620, 720, 820 or 1250 described with reference to fig. 6, 7, 8 or 12, or the subframe structure parameter management module 840 described with reference to fig. 7.

At block 1615, the method 1600 may include: wirelessly communicating with a second device according to a parameterized self-contained subframe structure having an interlace portion and an end portion. In some examples, the end portion may include a single transmission mode portion. The first subframe structure may include a periodic sequence of downlink TTIs and uplink TTIs. The operations at block 1615 may be performed using the wireless

communication management module

620, 720, 820, or 1250 described with reference to fig. 6, 7, 8, or 12, or the subframe structure management module 835 described with reference to fig. 8.

At block 1620, the method 1600 may include: the delay indicated by the nominal trigger-response delay parameter associated with the downlink TTI of the subframe structure is reduced to enable transmission of a response message corresponding to the downlink TTI during the end portion and prior to termination of the subframe structure. The operations at block 1620 may be performed using the wireless

communication management module

620, 720, 820, or 1250 described with reference to fig. 6, 7, 8, or 12, or the latency reduction module 845 described with reference to fig. 8.

Thus, method 1600 may provide wireless communication. It should be noted that method 1600 is but one implementation and that the operations of method 1600 may be rearranged or otherwise modified such that other implementations are possible.

In some examples, aspects of two or more of the

methods

1400, 1500, or 1600 described with reference to fig. 14, 15, or 16 may be combined.

Fig. 17 is a flow diagram illustrating an example method 1700 of wireless communication at a second device in accordance with various aspects of the disclosure. For clarity, the method 1700 is described below with reference to a second device having aspects of one or more of the scheduling devices described with reference to fig. 1 (e.g., the base station 105, the Wi-Fi access point 135, or a mesh network scheduler), aspects of one or more of the

apparatus

905, 1005, or 1105 described with reference to fig. 9, 10, or 11, or aspects of the base station 1305 described with reference to fig. 13. In some examples, a scheduling device or apparatus may execute one or more sets of codes to control the functional elements of the scheduling device or apparatus to perform the functions described below. Additionally or alternatively, the scheduling apparatus or device may use dedicated hardware to perform one or more of the functions described below.

At block 1705, the method 1700 may include: a first device (e.g., UE) is wirelessly communicated according to a first subframe structure. The first subframe structure may include a first periodic sequence of downlink TTIs and uplink TTIs. The operations at block 1705 may be performed using the wireless

communication management module

920, 1020, 1120, or 1360 described with reference to fig. 9, 10, 11, or 13, or the subframe

structure management module

935 or 1035 described with reference to fig. 9 or 10.

At block 1710, the method 1700 may include: the subframe truncation parameter is transmitted to the first device. The subframe truncation parameter may be transmitted, for example, during a first subframe structure. The operations at block 1710 may be performed using the wireless

communication management module

structure termination module

940 or 1040 described with reference to fig. 9 or 10.

In some examples, wirelessly communicating with the first device according to the first subframe structure may include: a first trigger message is transmitted to the first device during a first downlink TTI within an interleaved portion of a first subframe structure. Wirelessly communicating with the first device according to the first subframe structure may further include: after sending the first trigger message, a first response message associated with the first trigger message is received from the first device. The first response message may be received in an earliest uplink TTI of the first subframe structure that satisfies a nominal trigger-response delay parameter associated with the first downlink TTI. Wirelessly communicating with the first device according to the first subframe structure may further include: transmitting a second trigger message to the first device during a second downlink TTI within an end portion of the first subframe structure. Further, wirelessly communicating with the second device according to the first subframe structure may include: after sending the second trigger message, a second response message associated with the second trigger message is received from the first device. The second response message may be received in a last uplink TTI of the first subframe structure.

In some examples, wirelessly communicating with the first device according to the first subframe structure may include: a first response message is received from the first device during a first uplink TTI within an interleaved portion of the first subframe structure. Wirelessly communicating with the first device according to the first subframe structure may further include: after receiving the first response message, a first retrigger message associated with the first response message is sent to the first device. The first retrigger message may be sent in a downlink TTI of the first subframe structure that satisfies a nominal response-retrigger delay parameter associated with the first uplink TTI. Wirelessly communicating with the first device according to the first subframe structure may further include: receiving a second response message from the first device during a second uplink TTI in the last tail portion. Further, wirelessly communicating with the first device according to the first subframe structure may include: after receiving the second response message, a second re-trigger message is sent to the first device. The second retrigger message may be transmitted in a second subframe structure subsequent to the first subframe structure.

At block 1715, the method 1700 may optionally include: prior to terminating the first subframe structure at block 1720, a transmission of a response message associated with a trigger message transmitted during a TTI of the first subframe structure is received with a first trigger-response delay that is reduced as compared to a second trigger-response delay indicated by a nominal trigger-response delay parameter associated with the TTI. The operations at block 1715 may be performed using the wireless

communication management module

920, 1020, 1120, or 1360 described with reference to fig. 9, 10, 11, or 13, or the accelerated response processing module 945 or 1045 described with reference to fig. 9 or 20.

At block 1720, the method 1700 may include: terminating the first subframe structure based at least in part on the subframe truncation parameter. The operations at block 1720 may be performed using the wireless

communication management module

structure termination module

940 or 1040 described with reference to fig. 9 or 10.

At block 1725, the method 1700 may optionally include: following termination of the first subframe structure, wirelessly communicating with the first device according to a second subframe structure associated with a second periodic sequence of TTIs. In some examples, the first periodic sequence and the second periodic sequence may be the same periodic sequence. In some examples, one of the first and second periodic sequences may include at least an interleaving portion and the other of the first and second periodic sequences may include a single transmission mode portion. In some examples, both the first and second periodic sequences may include an interlace portion and a single transmission mode portion. The operations at block 1725 may be performed using the wireless

communication management module

structure management module

935 or 1035 described with reference to fig. 9 or 10.

Thus, method 1700 may provide wireless communication. It should be noted that method 1700 is only one implementation and that the operations of method 1700 may be rearranged or otherwise modified such that other implementations are possible.

Fig. 18 is a flow diagram illustrating an example method 1800 of wireless communication at a second device in accordance with various aspects of the disclosure. For clarity, the method 1800 is described below with reference to a second device having aspects of one or more of the scheduling devices described with reference to fig. 1 (e.g., the base station 105, the Wi-Fi access point 135, or the mesh network scheduler), aspects of one or more of the

apparatus

At block 1805, the method 1800 may include: a plurality of parameters related to one or more subframe structures is transmitted. In some examples, a parameter of the plurality of parameters may be transmitted semi-statically at a frequency less than once per subframe structure when the second device is communicating wirelessly with the first device (e.g., a UE); or dynamically transmitted during each subframe structure. In some examples, the plurality of parameters may define a configuration of a default subframe structure. In some examples, the plurality of parameters may define two or more subframe structures. In some examples, the plurality of parameters may define a portion of a subframe structure (e.g., an interleaved portion of the subframe structure).

The operations at block 1805 may be performed using the wireless

communication management module

920, 1020, 1120, or 1360 described with reference to fig. 9, 10, 11, or 13, or the subframe structure parameter notification module 1050 described with reference to fig. 10.

At block 1810, the method 1800 may include: communicating wirelessly with a first device according to a first subframe structure. The first subframe structure may include a first periodic sequence of downlink TTIs and uplink TTIs. The operations at block 1810 may be performed using the wireless

communication management module

structure management module

935 or 1035 described with reference to fig. 9 or 10.

At block 1815, the method 1800 may include: a signal (e.g., bits) indicating a type of the first subframe structure is transmitted. In some examples, a signal may be transmitted at the beginning of the first subframe structure indicating which of two or more subframe structures to use for the first subframe structure. In some examples, a bit may be transmitted at the beginning of the first subframe structure indicating whether the first subframe structure follows the configuration of the default subframe structure or the configuration of the predefined single transmission mode subframe structure. The operations at block 1815 may be performed using the wireless

communication management module

920, 1020, 1120, or 1360 described with reference to fig. 9, 10, 11, or 13, or the subframe structure type notification module 1055 described with reference to fig. 10.

At block 1820, the method 1800 may include: the value of the subframe truncation parameter is dynamically determined. In some examples, the value of the subframe truncation parameter may be based on at least one of: a traffic type, or a first bandwidth of the first device, or a second bandwidth associated with traffic for the first device, or a memory constraint, or a packet size, or an indicated class of service, or a combination thereof. The operations at block 1820 may be performed using the wireless

communication management module

920, 1020, 1120, or 1360 described with reference to fig. 9, 10, 11, or 13, or the subframe truncation parameter determination module 1060 described with reference to fig. 10.

At block 1825, the method 1800 may include: the subframe truncation parameter is transmitted to the first device. The subframe truncation parameter may be transmitted, for example, during a first subframe structure. In some examples, the subframe truncation parameter may be transmitted during a dynamically determined TTI of the first subframe structure, wherein the dynamically determined TTI occurs before beginning to terminate the first subframe structure. In some examples, the subframe truncation parameter may be transmitted during a predetermined TTI of the first subframe structure. The operations at block 1825 may be performed using the wireless

communication management module

structure termination module

940 or 1040 described with reference to fig. 9 or 10.

At block 1830, method 1800 may include: terminating the first subframe structure based at least in part on the subframe truncation parameter. The operations at block 1830 may be performed using the wireless

communication management module

structure termination module

940 or 1040 described with reference to fig. 9 or 10.

Thus, the method 1800 may provide for wireless communications. It should be noted that the method 1800 is only one implementation and that the operations of the method 1800 may be rearranged or otherwise modified such that other implementations are possible.

Fig. 19 is a flow diagram illustrating an example method 1900 of wireless communication at a second device in accordance with various aspects of the disclosure. For clarity, the method 1900 is described below with reference to a second device having aspects of one or more of the scheduling devices described with reference to fig. 1 (e.g., the base station 105, the Wi-Fi access point 135, or the mesh network scheduler), aspects of one or more of the

apparatuses

At block 1905, method 1900 may optionally include: a plurality of parameters related to one or more subframe structures is transmitted. In some examples, a parameter of the plurality of parameters may be transmitted semi-statically at a frequency less than once per subframe when the second device is communicating wirelessly with the first device (e.g., UE); or dynamically transmitted during each subframe structure. In some examples, the plurality of parameters may define a configuration of a default subframe structure. In some examples, the plurality of parameters may define two or more subframe structures. In some examples, the plurality of parameters may define a portion of a subframe structure (e.g., an interleaved portion of the subframe structure).

The operations at block 1905 may be performed using the wireless

communication management module

920, 1020, 1120, or 1360 described with reference to fig. 9, 10, 11, or 13, or the subframe structure parameter notification module 1140 described with reference to fig. 11.

At block 1910, method 1900 may include: wirelessly communicating with a first device according to a parameterized self-contained subframe structure having an interlace portion and an end portion. In some examples, the end portion may include a single transmission mode portion. The first subframe structure may include a periodic sequence of downlink TTIs and uplink TTIs. The operations at block 1910 may be performed using the wireless

communication management module

920, 1020, 1120, or 1360 described with reference to fig. 9, 10, 11, or 13, or the subframe structure management module 1135 described with reference to fig. 11.

At block 1915, the method 1900 may include: during the tail portion and prior to termination of the subframe structure, receiving transmission of a response message corresponding to a downlink TTI of the subframe structure, wherein the response message is received with a first trigger-response delay that is reduced compared to a second trigger-response delay indicated by a nominal trigger-response delay parameter associated with the downlink TTI. The operations at block 1915 may be performed using the wireless

communication management module

920, 1020, 1120, or 1360 described with reference to fig. 9, 10, 11, or 13, or the accelerated response processing module 1145 described with reference to fig. 11.

Thus, method 1900 may provide for wireless communication. It should be noted that the method 1900 is but one implementation and that the operations of the method 1900 may be rearranged or otherwise modified such that other implementations are possible.

In some examples, aspects of two or more of the

methods

1700, 1800, or 1900 described with reference to fig. 17, 18, or 19 may be combined.

The techniques described herein may be used for various wireless communication systems such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA and other systems. The terms "system" and "network" are often used interchangeably. A CDMA system may implement a radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and so on. CDMA2000 covers IS-2000, IS-95 and IS-856 standards. IS-2000 releases 0 and A are commonly referred to as CDMA 20001X, 1X, etc. IS-856(TIA-856) IS commonly referred to as CDMA 20001 xEV-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 methods such as Ultra Mobile Broadband (UMB), evolved UTRA (E-UTRA), IEEE 802.11(WiFi), IEEE 802.16(WiMAX), IEEE 802.20, flash OFDM^TMEtc. wireless technologies. 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-A, and GSM are described in documents from an organization entitled "third Generation partnership project" (3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3GPP 2). The techniques described herein may be used for the above-mentioned systems and wireless technologies, as well as other systems and wireless technologies, including cellular (e.g., LTE) communications over unlicensed and/or shared bandwidths. However, for purposes of example, the above description describes an LTE/LTE-A system, and LTE terminology is used in much of the above description, although it is describedThe applicable range of the technology is beyond LTE/LTE-A application.

The examples are described above in connection with the specific embodiments set forth in the figures and the specific embodiments are not intended to represent all examples that may be implemented or within the scope of the claims. The terms "example" and "exemplary" when used in this description mean "as an example, instance, or illustration," and are not "preferred" or "advantageous over other examples. The detailed description includes specific details for the purpose of providing an understanding of the described technology. However, the techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

Information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

The various illustrative blocks and modules described in connection with the disclosure herein may be implemented or performed with a general purpose processor, a Digital Signal Processor (DSP), an ASIC, 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. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

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 over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the present disclosure and appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. Features used to implement a function may also be physically located at various locations, including being distributed such that some of the function is implemented at different physical locations. As used herein (including in the claims), when the term "and/or" is used in a list having two or more items, it means that any one of the listed items may be employed by itself, or any combination of two or more of the listed items may be employed. For example, if a composition is described as containing component A, B and/or C, the composition may contain: only A; only B; only C; a combination of A and B; a combination of A and C; a combination of B and C; or a combination of A, B and C. Further, as used herein (including in the claims), a "or" as used in a list of items (e.g., a list of items ending with a phrase such as "at least one of … …" or "one or more of … …) indicates a disjunctive list such that, for example, the list" 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).

Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code means 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. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (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 medium. Disk and disc, as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the 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 of wireless communication at a first device, comprising:

wirelessly communicating with a second device according to a first subframe structure, wherein the first subframe structure comprises a first periodic sequence of downlink Transmission Time Intervals (TTIs) and uplink TTIs;

receiving a subframe truncation parameter from the second device, wherein the subframe truncation parameter indicates a total number of TTIs in the first subframe structure and divides the total number of TTIs into an interlace portion and an end portion;

receiving a plurality of trigger messages from the second device during the downlink TTI;

transmitting a plurality of response messages associated with the plurality of trigger messages during the uplink TTI; and

terminating the first subframe structure based at least in part on the subframe truncation parameter, wherein the first subframe structure is terminated by truncating an uplink burst of a plurality of uplink TTIs to a last uplink TTI, and wherein a response message associated with a current trigger message is transmitted in the last uplink TTI.

2. The method of claim 1, wherein each downlink TTI of the first periodic sequence is associated with a nominal trigger-response delay parameter that is a function of a TTI index associated with the downlink TTI.

3. The method of claim 2, wherein each uplink TTI of the first periodic sequence is associated with a nominal response-retrigger delay parameter that is a function of a TTI index associated with the downlink TTI.

4. The method of claim 3, further comprising:

rewriting the nominal trigger-response delay parameter or the nominal response-retrigger delay parameter associated with a TTI of the first subframe structure based at least in part on the subframe truncation parameter, wherein rewriting the nominal trigger-response delay parameter comprises:

reducing a delay indicated by the nominal trigger-response delay parameter to enable transmission of a response message prior to termination of the first subframe structure.

5. The method of claim 1, wherein the end portion comprises a single transmission mode portion.

6. The method of claim 1, wherein wirelessly communicating with the second device according to the first subframe structure comprises:

receiving a first trigger message from the second device during a first downlink TTI within the interlace portion or a second trigger message from the second device during a second downlink TTI within the tail portion; and

after receiving the first trigger message or the second trigger message, transmitting a first response message associated with the first trigger message or a second response message associated with the second trigger message to the second device, wherein the first response message is transmitted in an earliest uplink TTI of the first subframe structure that satisfies a nominal trigger-response delay parameter associated with the first downlink TTI, wherein the second response message is transmitted in the last uplink TTI of the first subframe structure.

7. The method of claim 1, further comprising:

following termination of the first subframe structure, wirelessly communicating with the second device according to a second subframe structure associated with a second periodic sequence of TTIs, wherein the first periodic sequences of downlink and uplink TTIs comprise a repeating sequence of downlink and uplink bursts, wherein each downlink burst comprises a first set of one or more downlink TTIs and each uplink burst comprises a second set of one or more uplink TTIs.

8. The method of claim 1, further comprising:

receiving a plurality of parameters from the second device, wherein the plurality of parameters include at least one of: a first number of TTIs in a downlink burst, or a second number of TTIs in an uplink burst, or a nominal trigger-response delay parameter, or a nominal response-retrigger delay parameter, or a combination thereof.

9. The method of claim 1, further comprising:

semi-statically receiving a plurality of parameters defining a configuration of a default subframe structure at a frequency less than once per subframe; and

receiving a bit at a beginning of the first subframe structure, the bit to indicate whether the first subframe structure follows the configuration of the default subframe structure or a configuration of a predefined single transmission mode subframe structure.

10. The method of claim 1, wherein the subframe truncation parameter is received during the first subframe structure.

11. An apparatus for wireless communication at a first device, comprising:

means for wirelessly communicating with a second device according to a first subframe structure, wherein the first subframe structure comprises a first periodic sequence of downlink Transmission Time Intervals (TTIs) and uplink TTIs;

means for receiving a subframe truncation parameter from the second device, wherein the subframe truncation parameter indicates a total number of TTIs in the first subframe structure and divides the total number of TTIs into an interlace portion and an end portion;

means for receiving a plurality of trigger messages from the second device during the downlink TTI;

means for transmitting a plurality of response messages associated with the plurality of trigger messages during the uplink TTI; and

means for terminating the first subframe structure based at least in part on the subframe truncation parameter, wherein the first subframe structure is terminated by truncating an uplink burst of a plurality of uplink TTIs to a last uplink TTI, and wherein a response message associated with a current trigger message is transmitted in the last uplink TTI.

12. The apparatus of claim 11, wherein each downlink TTI of the first periodic sequence is associated with a nominal trigger-response delay parameter that is a function of a TTI index associated with the downlink TTI.

13. The apparatus of claim 12, wherein the means for wirelessly communicating with the second device according to the first subframe structure comprises:

means for receiving a first trigger message from the second device during a first downlink TTI within the interlace portion or a second trigger message from the second device during a second downlink TTI within the tail portion; and

means for transmitting, to the second device, a first response message associated with the first trigger message or a second response message associated with the second trigger message after receiving the first trigger message or the second trigger message, wherein the first response message is transmitted in an earliest uplink TTI of the first subframe structure that satisfies the nominal trigger-response delay parameter associated with the first downlink TTI, wherein the second response message is transmitted in a last uplink TTI of the first subframe structure.

14. The apparatus of claim 11, further comprising:

means for semi-statically receiving a plurality of parameters defining a configuration of a default subframe structure at a frequency less than once per subframe; and

means for receiving a bit at a beginning of the first subframe structure, the bit to indicate whether the first subframe structure follows the configuration of the default subframe structure or a configuration of a predefined single transmission mode subframe structure.

15. A method of wireless communication at a second device, comprising:

wirelessly communicating with a first device according to a first subframe structure, wherein the first subframe structure comprises a first periodic sequence of downlink Transmission Time Intervals (TTIs) and uplink TTIs;

transmitting a subframe truncation parameter to the first device, wherein the subframe truncation parameter indicates a total number of TTIs in the first subframe structure and divides the total number of TTIs into an interlace portion and an end portion;

transmitting a plurality of trigger messages during the downlink TTI;

receiving a plurality of response messages associated with the plurality of trigger messages during the uplink TTI; and

receiving a response message associated with a current trigger message in a last uplink TTI of the first subframe structure, wherein the first subframe structure is terminated by truncating an uplink burst of a plurality of uplink TTIs to the last uplink TTI based at least in part on the subframe truncation parameter.

16. The method of claim 15, wherein the first periodic sequence of downlink and uplink TTIs comprises a repeating sequence of downlink and uplink bursts, wherein each downlink burst comprises a first set of one or more downlink TTIs and each uplink burst comprises a second set of one or more uplink TTIs.

17. The method of claim 15, further comprising:

prior to terminating the first subframe structure, receiving a transmission of a response message associated with a trigger message transmitted during a TTI of the first subframe structure, wherein the response message is received with a first trigger-response delay that is reduced compared to a second trigger-response delay indicated by a nominal trigger-response delay parameter associated with the TTI.

18. The method of claim 15, wherein the end portion comprises a single transmission mode portion.

19. The method of claim 15, further comprising:

transmitting a plurality of parameters to the first device, wherein the plurality of parameters comprise at least one of: a first number of TTIs in a downlink burst, or a second number of TTIs in an uplink burst, or a nominal trigger-response delay parameter, or a nominal response-retrigger delay parameter, or a combination thereof.

20. The method of claim 15, wherein the subframe truncation parameter is transmitted during the first subframe structure.

21. The method of claim 20, wherein the subframe truncation parameter is transmitted during a predetermined TTI of the first subframe structure or during a dynamically determined TTI of the first subframe structure, which occurs before beginning to terminate the first subframe structure.

22. The method of claim 15, further comprising:

dynamically determining a value of the subframe truncation parameter based on at least one of: a traffic type, or a first bandwidth of the first device, or a second bandwidth associated with traffic for the first device, or a memory constraint, or a packet size, or an indicated level of service, or a combination thereof.

23. An apparatus for wireless communication at a second device, comprising:

means for wirelessly communicating with a first device according to a first subframe structure, wherein the first subframe structure comprises a first periodic sequence of downlink Transmission Time Intervals (TTIs) and uplink TTIs;

means for transmitting a subframe truncation parameter to the first device, wherein the subframe truncation parameter indicates a total number of TTIs in the first subframe structure and divides the total number of TTIs into an interlace portion and an end portion;

means for transmitting a plurality of trigger messages during the downlink TTI;

means for receiving a plurality of response messages associated with the plurality of trigger messages during the uplink TTI; and

means for receiving a response message associated with a current trigger message in a last uplink TTI of the first subframe structure, wherein the first subframe structure is terminated by truncating an uplink burst of a plurality of uplink TTIs to the last uplink TTI based at least in part on the subframe truncation parameter.

24. The apparatus of claim 23, wherein the first periodic sequence of downlink and uplink TTIs comprises a repeating sequence of downlink and uplink bursts, wherein each downlink burst comprises a first set of one or more downlink TTIs and each uplink burst comprises a second set of one or more uplink TTIs.

25. The apparatus of claim 23, further comprising:

means for receiving, prior to terminating the first subframe structure, transmission of a response message associated with a trigger message transmitted during a TTI of the first subframe structure, wherein the response message is received with a first trigger-response delay that is reduced compared to a second trigger-response delay indicated by a nominal trigger-response delay parameter associated with the TTI.

26. The apparatus of claim 23, wherein the subframe truncation parameter is transmitted during a predetermined TTI of the first subframe structure or during a dynamically determined TTI of the first subframe structure that occurs before beginning to terminate the first subframe structure.

27. The apparatus of claim 23, further comprising:

means for dynamically determining a value of the subframe truncation parameter based on at least one of: a traffic type, or a first bandwidth of the first device, or a second bandwidth associated with traffic for the first device, or a memory constraint, or a packet size, or an indicated level of service, or a combination thereof.