CN117222049A

CN117222049A - Control signaling mechanism for enhanced device-to-device (D2D)

Info

Publication number: CN117222049A
Application number: CN202311257151.0A
Authority: CN
Inventors: 谢尔盖·班台莱耶夫; 阿列克谢·克尔耶夫; 亚历山大·斯托扬诺夫斯基; 许允亨
Original assignee: Apple Inc
Current assignee: Apple Inc
Priority date: 2015-04-08
Filing date: 2015-12-24
Publication date: 2023-12-12
Also published as: WO2016163972A1; CN107534828B; HK1249325A1; CN107534828A

Abstract

An apparatus and readable storage medium for a user equipment, UE, for control signaling for enhanced device-to-device, D2D, communication are disclosed. The UE exchanges secondary link control information SCI transmission resources (810) with one or more D2D UEs to negotiate physical resources for bi-directional SCI transmission and SCI reception. The UE determines a physical resource allocation (820) for SCI communication based on the exchange to identify a selected SCI period for the UE. The UE processes the SCI for transmission to one or more D2D UEs within the selected SCI period (830). The UE processes D2D UE SCI received from one or more D2D UEs at the UE for the selected SCI period (840).

Description

Control signaling mechanism for enhanced device-to-device (D2D)

The present application is a divisional application of the inventive patent application with application number 201580077420.2, application number 2015, 12-month 24, entitled "control signaling mechanism for enhanced device-to-device (D2D)".

Background

Wireless mobile communication technology uses various standards and protocols to transfer data between nodes (e.g., transmission stations) and wireless devices (e.g., mobile devices). Some wireless devices communicate using Orthogonal Frequency Division Multiple Access (OFDMA) in Downlink (DL) transmissions and single carrier frequency division multiple access (SC-FDMA) in Uplink (UL) and Sidelink (SL) transmissions. Standards and protocols for signal transmission using Orthogonal Frequency Division Multiplexing (OFDM) include the third generation partnership project (3 GPP) Long Term Evolution (LTE), the Institute of Electrical and Electronics Engineers (IEEE) 802.16 standard (e.g., 802.16e, 802.16 m), commonly referred to as WiMAX (worldwide interoperability for microwave access), the IEEE 802.11 standard, commonly referred to as Wi-Fi, in the industry.

In a 3GPP Radio Access Network (RAN) LTE system, the nodes may be evolved universal terrestrial radio access network (E-UTRAN) node bs (also commonly denoted as evolved node bs, enhanced nodes B, eNodeB or enbs) and a Radio Network Controller (RNC) that communicates with wireless devices called User Equipments (UEs). The Downlink (DL) transmission may be communication from a node (e.g., eNodeB) to a wireless device (e.g., UE), and the Uplink (UL) transmission may be communication from the wireless device to the node.

Furthermore, in the third generation partnership project (3 GPP) Long Term Evolution (LTE) Release 12, a device-to-device (D2D) discovery function is introduced to implement D2D services. Through direct D2D communication, user Equipments (UEs) may communicate directly with each other regardless of whether a base station or a portion of an evolved node B (eNB) is involved. One problem with D2D communication is device discovery for enabling D2D services. Device discovery involves discovering one or more other discoverable UEs within communication range for D2D communication, such as in 1-to-many (e.g., 1: many) D2D communication. Further, 3GPP LTE release 12 defines some sidelink physical and transport channels and corresponding procedures for D2D communication.

However, current challenges related to using sidelink physics and transport channels may prevent efficient use of use case (UE-to-UE and UE-Network (NW)) D2D communications.

Drawings

Features and advantages of the present disclosure will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, which, together with the detailed description, describe features of the disclosure by way of example, in which:

fig. 1 shows a mobile communication network within a cell according to an example;

FIG. 2 depicts a conventional process for layer 1 (L1) device-to-device (D2D) communication according to an example;

FIG. 3 illustrates a transmit (Tx) -receive (Rx) collision in one-to-one communication according to an example;

FIG. 4 illustrates logic cycle level orthogonalization according to an example;

FIG. 5 illustrates an additional resource activation configuration according to an example;

fig. 6 shows an example of time resource pattern for transmission (T-RPT) and sidelink control information (Sidelink Control Information, SCI) level orthogonalization according to an example;

fig. 7 depicts functionality of a User Equipment (UE) operable to perform control signaling for enhanced device-to-device (D2D) communication with one or more D2D UEs, in accordance with an example;

fig. 8 depicts additional functionality of a User Equipment (UE) operable to perform control signaling for enhanced device-to-device (D2D) communication with one or more D2D UEs, in accordance with an example;

Fig. 9 depicts additional functionality of a User Equipment (UE) operable to perform control signaling for enhanced device-to-device (D2D) communication with one or more D2D UEs, in accordance with an example;

fig. 10 depicts additional functionality of a User Equipment (UE) operable to perform control signaling for enhanced device-to-device (D2D) communication with one or more D2D UEs, in accordance with an example;

fig. 11 illustrates a diagram of a wireless device (e.g., UE) according to an example;

FIG. 12 illustrates a diagram of example components of a User Equipment (UE) apparatus according to an example; and

fig. 13 illustrates a diagram of a node (e.g., eNB) and a wireless device (e.g., UE) according to an example.

Reference will now be made to the exemplary embodiments illustrated, and specific language will be used herein to describe the same. It will nevertheless be understood that no limitation of the scope of the technology is thereby intended.

Detailed Description

Before the present technology is disclosed and described, it is to be understood that this technology is not limited to the particular structures, process steps, or materials disclosed herein, but is extended to equivalents thereof as recognized by those skilled in the relevant art. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. Like reference symbols in the various drawings indicate like elements. The numerals in the flowcharts and processes are provided for clarity in describing the steps and operations and do not necessarily represent a particular order or sequence.

Example embodiment

The following provides a preliminary overview of technical embodiments, which are then described in more detail below. This preliminary summary is intended to aid the reader in understanding the technology more quickly, but is not intended to identify key features or essential features of the technology, nor is it intended to limit the scope of the claimed subject matter.

In one aspect, a 3GPP Radio Access Network (RAN) LTE system can include an evolved universal terrestrial radio access network (E-UTRAN), which can include a plurality of evolved node Bs (eNBs) and communicate with a plurality of mobile stations (also known as User Equipments (UEs)). A radio protocol stack of the E-UTRAN is presented, which includes a radio resource control layer (RRC), a packet data convergence protocol layer (PDCP), a radio link control layer (RLC), a medium access control layer (MAC), and a physical layer (PHY).

In third generation partnership project (3 GPP) Long Term Evolution (LTE) release 12, device-to-device (D2D) discovery functionality is defined to enable D2D services. Through direct D2D communication (e.g., a "sidelink direct communication"), a User Equipment (UE) may communicate directly with one or more D2D UEs, whether or not a base station or part of an evolved node B (eNB) is engaged. The sidelink physical channel may carry synchronization related signals and information on a Physical Sidelink Broadcast Channel (PSBCH), device-to-device discovery using a discovery channel (PSDCH) of the physical sidelink, device-to-device communication (e.g., voice service) data using a Physical Sidelink Shared Channel (PSSCH), and control signaling using a Physical Sidelink Control Channel (PSCCH). The functionality of the sidelink physical channel may enable D2D discovery and D2D communication, such as in one-to-one (e.g., 1:1) or one-to-many (e.g., 1:many) D2D communication. The defined physical layer functions may also be reused without modification to implement other functions for UE-to-Network (NW) and UE-to-UE relay, such as Internet Protocol (IP) layer routing.

In one aspect, techniques are also provided for enhancing sidelink physical channel procedures and functions to support UE-to-network relay functionality. One of the main components of D2D relay is efficient relay node discovery and unicast (1:1) or multicast (1:multiple) communication. However, the physical layer functionality of 3GPP LTE release 12 limits D2D communication. For example, the physical layer functionality of 3GPP release 12 does not support at least one or more of the following: 1) link adaptation techniques, 2) acknowledgement (ACK/NACK) feedback, 3) efficient bi-directional resource allocation and management, 4) cluster/group management, and/or 5) UE-UE and UE-to-network relay. These limitations may impose certain constraints on voice over internet protocol (VoIP) and video traffic in UE-to-NW and/or UE-to-UE relay while having significant power consumption.

Thus, in one aspect, the present technology provides signaling procedures to implement physical layer functions, such as layer 1 (L1) and layer 2 (L2), L1/L2 functions, on a sidelink physical layer basis, such as a 3GPP LTE release 12 sidelink physical layer. In one aspect, signaling may extend the existing 3GPP LTE release 12 sidelink physical layer to enable more efficient operation for new use cases, such as UE-to-NW relay and/or UE-UE relay.

In one aspect, the present technology reuses the sidelink physical layer. However, the 3GPP LTE release 12D2D PHY is not optimized for unicast (1:1) or one-to-many (1:many) communications and D2D relay. In one aspect, the present technology enables more efficient D2D communication while minimizing impact on existing L1 layers. In one aspect, techniques for D2D functionality are provided by way of sidelink physical channels and transport channels and corresponding procedures.

In one aspect, techniques for control signaling for enhanced device-to-device (D2D) communication are provided. A User Equipment (UE) may use a bitmap (bitmap) to identify SCI periods to exchange secondary link control information (SCI) transmission resources with one or more D2D UEs to negotiate physical resources for bi-directional SCI transmission and SCI reception. The UE may determine a physical resource allocation for SCI communication based on the exchange. The UE may process the SCI for transmission to one or more D2D UEs within the selected SCI period. The UE may process the D2DUE SCI received from the one or more D2D UEs at the UE for the selected SCI period.

In one aspect, a technique for control signaling for enhanced device-to-device (D2D) communication is provided. A User Equipment (UE) may process a blind Sidelink Control Information (SCI) transmission received from a second UE in a Physical Sidelink Control Channel (PSCCH) with D2D control information. The UE may process broadcast data received from the second UE in a physical secondary link shared channel (PSSCH) according to the SCI transmission. The UE may process the D2D control information with feedback for transmission to the second UE, the feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK), channel State Information (CSI), and a Channel Quality Indicator (CQI).

Fig. 1 illustrates a mobile communication network within a cell 100 having a mobile device and an evolved node B (eNB). Fig. 1 shows an eNB 104 that may be associated with an anchor cell (anchor cell), a macro cell (macro cell), or a primary cell (primary cell). Further, the cell 100 may include mobile devices, such as user equipment (one or more UEs) 108 that may communicate with the eNB 104. The eNB 104 may be a station in communication with the UE 108 and may also be referred to as a base station, a node B, an access point, etc. For purposes of coverage and connectivity, the eNB 104 may be a high transmission power eNB (such as a macro eNB). The eNB 104 may be responsible for mobility and may also be responsible for Radio Resource Control (RRC) signaling. User equipment (one or more UEs) 108 may be supported by macro eNB 104. The eNB 104 may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" can refer to a particular geographic coverage area of an eNB and/or eNB subsystem (whether the eNB and/or eNB subsystem serves the coverage area) (whether the eNB or eNB subsystem depends on the context in which the term is used).

It should be noted that UE communication may be described using the Open Systems Interconnection (OSI) model, which includes multiple layers: layer 1, layer 2 and layer 3. Layer 1 (L1 layer) may be the lowest layer and implement various physical layer signal processing functions. The L1 layer will be referred to herein as the physical layer. Layer 2 (L2 layer) may be above the physical layer and may be responsible for links between UEs on the physical layer and one or more D2D UEs. In the user plane, the L2 layer may include a Medium Access Control (MAC) sublayer, a Radio Link Control (RLC) sublayer 512, and a Packet Data Convergence Protocol (PDCP). The UE may have some upper layers above the L2 layer, including a network layer (e.g., IP layer) and an application layer.

Fig. 2 depicts a conventional process for layer 1 (L1) device-to-device (D2D) communication 200. Fig. 2 shows a transmitting UE (Tx UE), a receiving UE (Rx UE), a pool of sidelink channel information (e.g., physical sidelink control channel "PSCCH"), and a pool of data (e.g., physical sidelink shared channel "PSSCH", sidelink Control Information (SCI), and a time resource pattern for transmission (T-RPT)). In D2D communication, source and destination identifications may be used to filter out corresponding data at layer 1, layer 2, and layer 3. L1 may contain a thumbnail source identification. Thus, the UE may be configured to process the redundant physical layer messages to receive the data of interest. Furthermore, as shown in fig. 2, even in the case of low data rate traffic, the receiving UE (RX UE) may process the entire allocated data resource pool if the UE successfully decodes the Sidelink Control Information (SCI) message from the transmitter of interest (Tx UE). As shown in fig. 2, a substantial portion of the allocated time resource pattern (T-RPT) for transmission is not used for transmission, and the receiving UE (Rx UE) may waste processing resources and energy by attempting to process resources without data.

Fig. 3 illustrates a transmit (Tx) -receive (Rx) collision in a one-to-one communication 300. As shown in fig. 3, in the case of bi-directional traffic, the problem is further compounded because transmission and reception collisions, such as SCI pool and data pool for Physical Shared Control Channel (PSCCH), can occur at the same UE. For example, collisions due to half duplex constraints may occur at the same UE, which prevents simultaneous transmission and reception by the device, resulting in lost transmission of SCI and/or data packets.

In the case of sidelink transmission mode-1 (eNB scheduling), SCI and PSSCH resources may be allocated to both sides of the sidelink when the eNB schedules D2D transmission in such a way that half-duplex collisions are minimized and data traffic from different directions are orthogonalized in time. Thus, special information from a Buffer Status Report (BSR) may be used. In case of sidelink transmission mode-2 (autonomous UE), the UE may autonomously select frequency and time resources for transmission and orthogonal transmission is possible probabilistically. It should be noted that the special information may include information in which the first UE reports in the BSR the destination identity of another UE with which the first UE wants to communicate. The other UE also performs the same processing on the first UE (e.g., reports a BSR with the identity of the first UE to the eNB). Finally, the eNB can know who wants to communicate with whom, and thus can think about how to orthogonalize the transmissions of the two UEs. The probability selection of orthogonal real-time (in-time) resources may be due to the assignment process of T-RPT selection. In mode-2, the T-RPT may be selected uniformly and randomly from the entire set of resource patterns, which may optionally be limited to a reduced subset. Each pattern may be limited to a small subset of mutually orthogonal patterns. For example, in the case of Frequency Division Duplexing (FDD), there are 106 different patterns without limitation.

The resource pattern of k=1 (transmission once every 8 sidelink subframes) has 7 mutually orthogonal T-RPT bitmaps. As shown in fig. 3, this translates into a substantial collision probability when the T-RPT is randomly selected.

Thus, to prevent these challenges and collisions, the present technique provides control signaling to negotiate the physical resources used. In the case of two-way one-to-one communication, special control information may be exchanged between devices to negotiate physical resources for transmission and reception. The information exchange may be initiated by either of the two devices engaged in the communication or as part of the initial transmission of each device. In one aspect, different rules may be defined to select orthogonal resources in different procedures (e.g., one-to-one relay connection establishment).

Negotiation or configuration of transmission periods for different functions

In one aspect, transmission resources between two UEs or a group of UEs involved in D2D communication may be orthogonalized by utilizing different secondary link control information (SCI) (also referred to as SA scheduling assignment) periods/pools. Periodically allocated physical resources may be used to build the control and data pools and the SCI pool and data pool may be monitored using a D2D capable UE. Future 3GPP LTE releases may be employed by configuring "logical" transmission periods with different functions on the basis of frequently configured physical resources.

Referring now to fig. 4, a logic cycle level orthogonalization 400 is depicted. In one aspect, the random SCI resources and the existing L1 functions of T-RPT selection can be reused. For example, to reuse the random SCI resources and the existing L1 function of T-RPT selection, the concept of a logical scheduling period can be introduced. In one example, such a logical transmission pattern may be configured, such as a first UE (e.g., UE 1) transmitting every even SCI period and a second UE (e.g., UE 2) may transmitting every odd SCI period, as shown by the logical period level orthogonalization of fig. 4.

Alternatively, the logical transmission pattern may occupy a portion of the SCI period (logical PSSCH pool), such as a first UE (e.g., UE 1) transmitting in the first half of the PSSCH pool and a second UE (e.g., UE 2) transmitting in the remaining half of the PSSCH period, bypassing the initial transmission opportunity. The latter example may result in collisions on half the boundary of the PSSCH pool because the particular pool bitmap pattern and the selected T-RPT cannot allow the resources to be partitioned in equal parts. In this case, transmissions on conflicting resources may be delayed and/or discarded. Another problem with the latter embodiment is the probability of SCI resource collision (because SCI resources are randomly selected in mode-2).

Thus, the desired logical transmission periodic pattern between two or more UEs may be negotiated or configured through dedicated higher layer signaling. In a no network coverage scenario, some SCI periods may be preconfigured. For example, the UE-to-NW discovery announcement rate may be configured as a multiple of the sidelink data and control physical period (e.g., SCI period).

In one aspect, the D2D physical communication channel may be used for UE-to-Network (NW) relay discovery because the payload size of the relay discovery message is much larger (e.g., greater than 232 bits) than the D2D discovery channel. This option may be more applicable if low latency and large payload messages are exchanged. The communication channel may also be used if there are no configured physical discovery resources.

In one aspect, in a UE-to-NW scenario, a single UE may have multiple D2D communication connections to handle multiple discovery responses. It should be noted that if the legacy 3GPP Release 12 UE procedure for resource selection is reused, there are a large number of orthogonal one-to-many (1:1) connections in time on a single UE due to the random nature of mode-2. To allow for such use cases, a UE establishing one or more one-to-many (1:1) connections may additionally provide control information for the receiving UE and inform the receiving UE of the transmission resource selection, thereby avoiding duplex constraints.

In one aspect, for low data rate services (e.g., discovery through D2D communications), a logical transport region may be configured and applied over an existing SCI resource pool and data resource pool configuration and signaled as a resource activation bitmap during the SCI period. For example, a resource activation bitmap of "1" may indicate which SCI period is activated for such transmission, and "0" may indicate the SCI period that is disabled, as shown in fig. 5, with fig. 5 showing an additional resource activation configuration 500. The configuration signaling may also be located in the Physical Sidelink Broadcast Channel (PSBCH), or be part of the network RRC SIB signaling, or negotiated over the PSCCH/PSSCH channel on the D2D link.

Such resource configuration may be more efficient to participate by the UE in communication-assisted discovery because the UE can only wake up, synchronize and activate D2D communication functions in a pre-configured time window while maintaining a sleep mode for all remaining time periods.

T-RPT and SCI resource level negotiation

The D2D transmission may be orthogonalized in time by selecting orthogonal or quasi-orthogonal time resources for SCI and data transmission. In one aspect, once the UE decodes the SCI and corresponding data for the TX UE of interest, the UE may select SCI and data transmission resources from a subset orthogonal to the SCI resources and T-RPT used by the first TX UE, as shown in fig. 6. Fig. 6 shows an example of time resource pattern (T-RPT) and Sidelink Control Information (SCI) level orthogonalization 600 for transmission. However, one challenge is: currently for each SCI period, the resources used for SCI and data transfer can be randomly selected without any condition of the previously selected resources. To achieve the proposed T-RPT and SCI level orthogonalization, resources for mode-2 transmission may be configured by higher layers. In other words, if higher layers provide resource configuration, random resource selection may be optional.

Signaling options:

it should be noted that the functionality described herein may be implemented by introducing additional control signaling over the D2D link. The following options are contemplated: 1) Physical layer signaling. A new SCI format (e.g., SCI format 1) may be introduced to set up resources for 1:1 communications. The new SCI format may have the same size as SCI format 0. The SCI format may be distinguished by setting the T-RPT index to a reserved value, or scrambling the SCI payload or CRC in some predefined sequence. Furthermore, a dedicated resource pool may be allocated for the new SCI format.

Higher layer signaling may be provided. For example, L2 or higher layer control signaling carried in a Physical Sidelink Shared Channel (PSSCH) may be used to control D2D operation on physical resources. This option is much more flexible in terms of the amount of control signaling that can be transmitted and in terms of the functions that can be enabled. Furthermore, it can have good link budget and robustness against interference (due to 4 blind retransmissions used in the PSSCH). The control information may also be encoded at the PDCP layer or higher layers. For example, a PC5 signaling protocol or PC5-D protocol may be used to exchange control messages and control/configure D2D operations at a lower layer (e.g., physical layer).

Additional content of control signaling for efficient 1:1 communication

Because resources for one-to-one (1:1) communications can be negotiated using the solutions provided herein (e.g., layer 2 control signaling), additional control information can be effectively exchanged over the 1:1 link during communications.

In one aspect, during a selected SCI period, one or more D2D UE control information has feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK) signal, channel State Information (CSI), and a Channel Quality Indicator (CQI).

For ACK/NACK, layer 2 acknowledgement may be effectively implemented through dedicated feedback messages. For link adaptation information, the sidelink function lacks channel quality feedback. However, if there is a stable reverse channel through the resource negotiation mechanism, feedback may be sent per SCI period or per transmission opportunity (or other granularity level). The feedback may include channel quality indicators, precoding indexes, ranks (rank), target MCS, desired T-RPT, frequency allocation, desired SCI resource index, etc. In one aspect, the resource negotiation indication may also be assumed to be a feedback type. In one aspect, resource control and allocation signaling may be sent with one of the UEs acting as a resource coordinator or a leader of a cluster or group. The signaling may provide a bottom control (floor control), resource allocation to the UE, scheduling information including MCS, and power setting.

Fig. 7 depicts a flow chart of a User Equipment (UE) operable to perform control signaling for enhanced device-to-device (D2D) communication with one or more device-to-device (D2D) UEs. A UE (such as UE 1) may receive D2D control information with resource negotiation and activation messages from one or more D2D UEs (such as UE 2). A UE (such as UE 1) may send D2D control information with a response to the resource negotiation and activation message to one or more D2D UEs (such as UE 2). A UE, such as UE 1, may receive a secondary link control information (SCI) transmission in a physical secondary link control channel (PSCCH) from one or more D2D UEs, such as UE 2, which may include D2D control information. A UE (such as UE 1) may receive SCI (e.g., instantaneous decoding on PSCCH) from one or more UEs (such as UE 2) and may obtain information regarding subsequent data transmissions. The information is provided with a response to the resource negotiation and activation message. A UE, such as UE 1, may receive broadcast D2D data from one or more D2D UEs, such as UE 2, in a Physical Sidelink Shared Channel (PSSCH) according to the SCI. A UE (such as UE 1) may receive D2D data from one or more D2D UEs (such as UE 2). A UE, such as UE 1, may send D2D control information to one or more D2D UEs, such as UE 2, with feedback that may include an acknowledgement/negative acknowledgement (ACK/NACK) signal, channel State Information (CSI), and/or a Channel Quality Indicator (CQI).

Fig. 8 depicts functionality 800 of a User Equipment (UE) operable to perform control signaling for enhanced device-to-device (D2D) communication with one or more device-to-device (D2D) UEs. The function 800 may be implemented as a method or the function 800 may be performed as instructions on a machine, where the instructions are included on one or more computer-readable media or on one or more non-transitory machine-readable storage media. As shown in block 810, the one or more processors and memory may be configured to exchange secondary link control information (SCI) transmission resources with one or more D2D UEs to negotiate physical resources for bi-directional SCI transmission and SCI reception. As shown in block 820, the one or more processors and memory may be configured to determine physical resource allocation for SCI communication based on the exchange to identify a selected SCI period for the UE. As indicated by block 830, the one or more processors and memory may be configured to process the SCI to enable transmission to the one or more D2D UEs within the selected SCI period. As shown in block 840, the one or more processors and memory may be configured to process D2D UE SCI received from the one or more D2D UEs at the UE for the selected SCI period.

Fig. 9 depicts functionality 900 of a User Equipment (UE) operable to perform control signaling for enhanced device-to-device (D2D) communication with one or more device-to-device (D2D) UEs. The function 900 may be implemented as a method or the function 900 may be performed as instructions on a machine, where the instructions are included on one or more computer-readable media or on one or more non-transitory machine-readable storage media. As shown in block 910, the one or more processors and memory may be configured to exchange secondary link control information (SCI) transmission resources with the one or more D2D UEs by identifying SCI periods using a bitmap to negotiate physical resources for bi-directional SCI transmission and SCI reception. As shown in block 920, the one or more processors and memory may be configured to determine physical resource allocation for SCI communication based on the exchange. As shown in block 930, the one or more processors and memory may be configured to process the SCI to enable transmission to the one or more D2DUE within the selected SCI period. As indicated at block 940, the one or more processors and memory may be configured to process D2D UE SCI received from the one or more D2D UEs at the UE within the selected SCI period.

Fig. 10 depicts a functionality 1000 of a User Equipment (UE) operable to perform control signaling for enhanced device-to-device (D2D) communication with one or more device-to-device (D2D) UEs. The function 1000 may be implemented as a method or the function 1000 may be performed as instructions on a machine, where the instructions are included on one or more computer-readable media or on one or more non-transitory machine-readable storage media. As indicated by block 1010, the one or more processors and memory may be configured to process a blind Sidelink Control Information (SCI) transmission received from the second UE in a Physical Sidelink Control Channel (PSCCH) with D2D control information. As indicated at block 1020, the one or more processors and memory may be configured to process broadcast data received from the second UE in a physical secondary link shared channel (PSSCH) in accordance with the SCI transmission. As shown in block 1030, the one or more processors and memory may be configured to process the D2D control information with feedback for transmission to the second UE, the feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK), channel State Information (CSI), and a Channel Quality Indicator (CQI).

In one aspect, one or more actions of FIGS. 7-10 may include: configuring, by the UE, resources to be used for D2D transmission of data and control; configuring, by the UE, resources to be used for D2D reception of data and control; transmitting, by the UE, a control message with a feedback payload; transmitting, by the UE, resource configuration and other control information (within the feedback); receiving, by the UE, resource configuration and other control information within the feedback; and receiving, by the UE, a control message within the configured resources. The dedicated SCI format may be used to transmit control information. Higher layer control signaling protocols may be used to send control information. Higher layer control signaling may be encoded and transmitted in the PSSCH or PSDCH.

In an aspect, the control message may include one or more of a resource configuration (or reconfiguration), ACK/NACK signaling, channel State Information (CSI), channel Quality Indicator (CQI), precoding index, rank, target MCS, index of a time resource pattern (T-RPT) for transmission, frequency allocation, and/or SCI resource index. The control message may include resource scheduling information for the group and/or cluster of UEs. The resource configuration may include a logical period that allows for transmission. The resource configuration may include a bitmap of SCI periods, with a "1" activating the corresponding SCI period for transmission and a "0" deactivating. The logic period may be a multiple or fraction of the SCI period. The resource configuration may include T-RPT and SCI resource indexes for the intended UE.

Fig. 11 illustrates a diagram of a wireless device (e.g., UE) according to an example. Fig. 11 provides an example illustration of a wireless device, such as a User Equipment (UE), mobile Station (MS), mobile wireless device, mobile communication device, tablet, cell phone, or other type of wireless device. In one aspect, a wireless device may include at least one of an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, a baseband processor, an applications processor, internal memory, a non-volatile memory port, and combinations thereof.

The wireless device may include one or more antennas configured to communicate with a node or a transmitting station, such as a Base Station (BS), an evolved node B (eNB), a baseband unit (BBU), a Remote Radio Head (RRH), a Remote Radio Equipment (RRE), a Relay Station (RS), a Radio Equipment (RE), a Remote Radio Unit (RRU), a Central Processing Module (CPM), or other type of Wireless Wide Area Network (WWAN) access point. The wireless device may be configured to communicate using at least one wireless communication standard including 3GPP LTE, wiMAX, high Speed Packet Access (HSPA), bluetooth (Bluetooth), and Wi-Fi. The wireless device may communicate using a separate antenna for each wireless communication standard or a shared antenna for multiple wireless communication standards. The wireless device may communicate in a Wireless Local Area Network (WLAN), a Wireless Personal Area Network (WPAN), and/or a WWAN. The mobile device may include a storage medium. In one aspect, the storage medium may be associated with and/or in communication with an application processor, a graphics processor, a display, a non-volatile memory port, and/or an internal memory. In one aspect, the application processor and the graphics processor are storage media.

Fig. 12 illustrates example components of a User Equipment (UE) device 1200 in one aspect. In some aspects, the UE device 1200 may include application circuitry 1202, baseband circuitry 1204, radio Frequency (RF) circuitry 1206, front End Module (FEM) circuitry 1208, and one or more antennas 1210 coupled together at least as shown.

The application circuitry 1202 may include one or more application processors. For example, the application circuitry 1202 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The processor(s) may include any combination of general-purpose processors and special-purpose processors (e.g., graphics processors, application processors, etc.). The processor may be coupled to the storage medium 1212 and/or may include the storage medium 1212, and may be configured to execute instructions stored in the storage medium 1212 to enable various applications and/or operating systems to run on the system.

The baseband circuitry 1204 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The baseband circuitry 1204 may include one or more baseband processors and/or control logic to process baseband signals received from the receive signal path of the RF circuitry 1206 and to generate baseband signals for the transmit signal path of the RF circuitry 1206. Baseband processing circuit 1204 may interface with application circuit 1202 for generation and processing of baseband signals and for controlling the operation of RF circuit 1206. For example, in some aspects, the baseband circuitry 1204 may include a second generation (2G) baseband processor 1204a, a third (3G) baseband processor 1204b, a fourth (4G) baseband processor 1204c, and/or other baseband processor(s) 1204d for other existing generations, developing or to-be-developed generations (e.g., fifth generation (5G), 6G, etc.). The baseband circuitry 1204 (e.g., one or more of the baseband processors 1204 a-d) may handle various radio control functions that are capable of communicating with one or more radio networks via the RF circuitry 1206. The radio control functions may include, but are not limited to: signal modulation/demodulation, encoding/decoding, radio frequency shifting, etc. In some aspects, the modulation/demodulation circuitry of the baseband circuitry 1204 may include Fast Fourier Transform (FFT), precoding, and/or constellation mapping/demapping functions. In some aspects, the encoding/decoding circuitry of the baseband circuitry 1204 may include convolution, tail-biting convolution, turbo, viterbi, and/or low-density parity-check (LDPC) encoder/decoder functions. Aspects of the modem and encoder/decoder functions are not limited to these examples and may include other suitable functions in other aspects.

In some aspects, the baseband circuitry 1204 may include protocol stack elements, such as Evolved Universal Terrestrial Radio Access Network (EUTRAN) protocols, including, for example, physical (PHY), medium Access Control (MAC), radio Link Control (RLC), packet Data Convergence Protocol (PDCP), and/or Radio Resource Control (RRC) elements. The Central Processing Unit (CPU) 1204e of the baseband circuit 1204 may be configured as an element of a protocol stack running signaling for PHY, MAC, RLC, PDCP and/or RRC layers. In some aspects, the baseband circuitry may include one or more audio Digital Signal Processors (DSPs) 1204f. The audio DSP(s) 1204f may include elements for compression/decompression and echo cancellation, and may include other suitable processing elements in other aspects. In some aspects, components of the baseband circuitry may be suitably combined in a single chip, in a single chipset, or disposed on the same circuit board. In some aspects, some or all of the constituent components of baseband circuitry 1204 and application circuitry 1202 may be implemented together, such as on a system on a chip (SOC).

In some aspects, baseband circuitry 1204 may provide communications compatible with one or more radio technologies. For example, in some aspects, the baseband circuitry 1204 may support communication with an Evolved Universal Terrestrial Radio Access Network (EUTRAN) and/or other Wireless Metropolitan Area Networks (WMANs), wireless Local Area Networks (WLANs), wireless Personal Area Networks (WPANs). Aspects of radio communications in which the baseband circuitry 1204 is configured to support more than one wireless protocol may be referred to as multi-mode baseband circuitry.

The RF circuitry 1206 may enable communication with a wireless network using modulated electromagnetic radiation through a non-solid medium. In various aspects, the RF circuitry 1206 may include switches, filters, amplifiers, and the like to facilitate communication with a wireless network. The RF circuit 1206 may include a receive signal path, which may include circuitry for down-converting RF signals received from the FEM circuit 1208 and providing baseband signals to the baseband circuit 1204. The RF circuitry 1206 may also include transmit signal paths, which may include circuitry to up-convert baseband signals provided by the baseband circuitry 1204 and provide RF output signals to the FEM circuitry 1208 for transmission.

In some aspects, the RF circuit 1206 may include a receive signal path and a transmit signal path. The receive signal path of RF circuit 1206 may include mixer circuit 1206a, amplifier circuit 1206b, and filter circuit 1206c. The transmit signal path of the RF circuit 1206 may include a filter circuit 1206c and a mixer circuit 1206a. The RF circuit 1206 may also include a synthesizer circuit 1206d for synthesizing frequencies for use by the mixer circuit 1206a of the receive signal path and the transmit signal path. In some aspects, the mixer circuit 1206a of the receive signal path may be configured to down-convert the RF signal received from the FEM circuit 1208 based on the synthesized frequency provided by the synthesizer circuit 1206 d. The amplifier circuit 1206b may be configured to amplify the down-converted signal, and the filter circuit 1206c may be a Low Pass Filter (LPF) or a Band Pass Filter (BPF) configured to remove unwanted signals from the down-converted signal to generate an output baseband signal. The output baseband signal may be provided to baseband circuitry 1204 for further processing. In some aspects, the output baseband signal may be a zero frequency baseband signal, although this is not mandatory. In some aspects, mixer circuit 1206a of the receive signal path may comprise a passive mixer, although the scope of the aspect is not limited in this respect.

In some aspects, the mixer circuit 1206a of the transmit signal path may be configured to upconvert the input baseband signal based on a synthesized frequency provided by the synthesizer circuit 1206d to generate an RF output signal for the FEM circuit 1208. The baseband signal may be provided by baseband circuitry 1204 and may be filtered by filter circuitry 1206 c. The filter circuit 1206c may include a Low Pass Filter (LPF), although the scope of the aspect is not limited in this respect.

In some aspects, the mixer circuit 1206a of the receive signal path and the mixer circuit 1206a of the transmit signal path may include two or more mixers, and may be arranged to quadrature down-convert and/or up-convert, respectively. In some aspects, the mixer circuit 1206a of the receive signal path and the mixer circuit 1206a of the transmit signal path may include two or more mixers and may be arranged for image rejection (e.g., hartley image rejection). In some aspects, the mixer circuit 1206a of the receive signal path and the mixer circuit 1206a of the transmit signal path may be arranged for direct down-conversion and/or direct up-conversion, respectively. In some aspects, the mixer circuit 1206a of the receive signal path and the mixer circuit 1206a of the transmit signal path may be configured for superheterodyne operation.

In some embodiments, the output baseband signal and the input baseband signal may be analog baseband signals, although the scope of the embodiments is not limited in this respect. In some alternative aspects, the output baseband signal and the input baseband signal may be digital baseband signals. In these alternative aspects, the RF circuit 1206 may include analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuitry, and the baseband circuit 1204 may include a digital baseband interface for communicating with the RF circuit 1206.

In some dual mode embodiments, separate radio 1C circuits may be provided for processing signals for each spectrum, although the scope of the embodiments is not limited in this respect.

In some embodiments, synthesizer circuit 1206d may be a fractional-N (N) synthesizer or a fractional-N+1 (N/N+1) synthesizer, although the scope of the embodiments is not limited in this respect as other types of frequency synthesizers may be suitable. For example, synthesizer circuit 1206d may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer including a phase locked loop with a frequency divider.

Synthesizer circuit 1206d may be configured to synthesize an output frequency for use by mixer circuit 1206a of RF circuit 1206 based on the frequency input and the divider control input. In some embodiments, synthesizer circuit 1206d may be an N/N+1 division synthesizer.

In some embodiments, the frequency input may be provided by a Voltage Controlled Oscillator (VCO), but this is not mandatory. The divider control input may be provided by the baseband circuitry 1204 or the application processor 1202, depending on the desired output frequency. In some embodiments, the divider control input (e.g., N) may be determined from a look-up table based on the channel indicated by the application processor 1202.

Synthesizer circuit 1206d of RF circuit 1206 may include a frequency divider, a Delay Locked Loop (DLL), a multiplexer, and a phase accumulator. In some embodiments, the frequency divider may be a dual-mode frequency divider (DMD) and the phase accumulator may be a Digital Phase Accumulator (DPA). In some embodiments, the DMD may be configured to divide the input signal by N or n+1 (e.g., based on the carry out) to provide a fractional divide ratio (fractional division ratio). In some example embodiments, the DLL may include a set of cascaded tunable delay elements, a phase detector, a charge pump, and a D-type flip-flop. In these embodiments, the delay elements may be configured to decompose the VCO period into Nd equal phase packets, where Nd is the number of delay elements in the delay line. In this way, the DLL provides negative feedback to help ensure that the total delay through the delay line is one VCO cycle.

In some embodiments, synthesizer circuit 1206d may be configured to generate a carrier frequency as the output frequency, while in other embodiments the output frequency may be a multiple of the carrier frequency (e.g., twice the carrier frequency, four times the carrier frequency) and used in conjunction with quadrature generator and divider circuits to generate a plurality of signals at carrier frequencies having a plurality of different phases relative to each other. In some embodiments, the output frequency may be the LO frequency (f _LO ). In some embodiments, the RF circuit 1206 may include an IQ/polarity converter.

The FEM circuitry 1208 may include a receive signal path that may include circuitry configured to operate on RF signals received from one or more antennas 1210, amplify the received signals, and provide an amplified version of the received signals to the RF circuitry 1206 for further processing. The FEM circuitry 1208 may also include a transmit signal path, which may include circuitry configured to amplify signals provided by the RF circuitry 1206 for transmission by one or more of the one or more antennas 1210.

In some embodiments, FEM circuitry 1208 may include a TX/RX converter to switch between transmit and receive mode operation. The FEM circuitry may include a receive signal path and a transmit signal path. The receive signal path of the FEM circuitry may include a Low Noise Amplifier (LNA) to amplify the received RF signal and provide the amplified received RF signal as an output (e.g., to the RF circuitry 1206). The transmit signal path of FEM circuitry 1208 may include a Power Amplifier (PA) for amplifying an input RF signal (e.g., provided by RF circuitry 1206), and one or more filters for generating the RF signal for subsequent transmission (e.g., transmission through one or more of one or more antennas 1210).

In some embodiments, the UE device 1800 may include additional elements, such as memory/storage devices, displays, cameras, sensors, and/or input/output (I/O) interfaces.

Fig. 13 illustrates a diagram 1300 of a node 1310 (e.g., an eNB and/or a serving GPRS support node) and a wireless device (e.g., a UE) according to an example. A node may include a Base Station (BS), a Node B (NB), an evolved node B (eNB), a baseband unit (BBU), a Remote Radio Head (RRH), a Remote Radio Equipment (RRE), a Remote Radio Unit (RRU), or a Central Processing Module (CPM). In one aspect, the node may be a serving GPRS support node. Node 1310 may include node device 1312. Node device 1312 or node 1310 may be configured to communicate with wireless device 1320. Node device 1312 may be configured to implement the techniques. The node device 1312 may include a processing module 1314 and a transceiver module 1316. In one aspect, the node device 1312 may include a transceiver module 1316 and a processing module 1314 that form a circuit 1318 for the node 1310. In one aspect, transceiver module 1316 and processing module 1314 may form circuitry of node device 1312. The processing module 1314 may include one or more processors and memory. In one embodiment, processing module 1322 may include one or more application processors. The transceiver module 1316 may include a transceiver and one or more processors and memory. In one embodiment, transceiver module 1316 may include a baseband processor.

The wireless device 1320 may include a transceiver module 1324 and a processing module 1322. The processing module 1322 may include one or more processors and memory. In one embodiment, processing module 1322 may include one or more application processors. The transceiver module 1324 may include a transceiver and one or more processors and memory. In one embodiment, the transceiver module 1324 may include a baseband processor. The wireless device 1320 may be configured to implement the techniques. The node 1310 and wireless device 1320 may also include one or more storage media, such as transceiver modules 1316, 1324 and/or processing modules 1314, 1322.

As used herein, the term "circuitry" may refer to or include part of an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or combination thereof) and/or memory (shared, dedicated, or combination) that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable hardware components that provide the described functionality. In some aspects, circuitry may be implemented in or functionality associated with one or more software or firmware modules. In some aspects, the circuitry may comprise logic that is at least partially operable in hardware.

Example

The following examples relate to specific technical embodiments and point out specific features, elements or steps that may be used to implement or may be otherwise combined in these embodiments.

Example 1 may include an apparatus of a User Equipment (UE) configured for control signaling for enhanced device-to-device (D2D) communication, the apparatus comprising one or more processors and memory configured to: exchanging secondary link control information (SCI) transmission resources with one or more D2D UEs to negotiate physical resources for bi-directional SCI transmission and SCI reception; determining physical resource allocation for SCI communication based on the exchange to identify a selected SCI period for the UE; processing the SCI to enable transmission to one or more D2D UEs within the selected SCI period; and processing, at the UE, the D2D UE SCI received from the one or more D2D UEs within the selected SCI period.

Example 2 includes the apparatus of example 1, wherein the one or more processors and memory are further configured to transmit the control information using a dedicated SCI format.

Example 3 includes the apparatus of example 1 or 2, wherein the one or more processors and memory are further configured to process the control information with feedback for transmission to the one or more D2D UEs during the selected SCI period, the feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK) signal, channel State Information (CSI), and Channel Quality Indicator (CQI).

Example 4 includes the apparatus of example 1, wherein the one or more processors and memory are further configured to process SCI received from the one or more D2D UEs with an acknowledgement (ACK/NACK) signal, channel State Information (CSI), and Channel Quality Indicator (CQI).

Example 5 includes the apparatus of example 1 or 4, wherein the one or more processors and memory are further configured to process the control information with feedback for transmission to the one or more D2D UEs during the selected SCI period, the feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK) signal, channel State Information (CSI), and a Channel Quality Indicator (CQI).

Example 6 includes the apparatus of example 1, wherein the one or more processors and memory are further configured to transmit the control information using a higher layer control signaling protocol.

Example 7 includes the apparatus of example 6, wherein the one or more processors and memory are further configured to encode and process higher layer control signaling in a Physical Sidelink Shared Channel (PSSCH) or a Physical Sidelink Discovery Channel (PSDCH).

Example 8 includes the apparatus of example 1 or 7, wherein the one or more processors and memory are further configured to include in the control message at least one of, or a combination of, the following: acknowledgement/negative acknowledgement (ACK/NACK), channel State Information (CSI), channel Quality Indicator (CQI), precoding index, rank, target Modulation and Coding Scheme (MCS), index of time resource pattern for transmission (T-RPT), frequency allocation, SCI resource index.

Example 9 includes the apparatus of example 1, wherein the one or more processors and memory are further configured to include resource scheduling information for the one or more D2D UEs in the control message.

Example 10 includes the apparatus of example 1 or 9, wherein the one or more processors and memory are further configured to configure the physical resources of the logical cycle for transmitting the data.

Example 11 includes the apparatus of example 9, wherein the logic period is a multiple or fraction of the SCI period.

Example 12 includes the apparatus of example 1 or 9, wherein the one or more processors and memory are further configured to identify the selected SCI period using a bitmap to activate or deactivate the SCI period.

Example 13 includes the apparatus of example 12, wherein the one or more processors and memory are further configured to configure the physical resources with a SCI resource index and a time resource pattern for transmission (T-RPT) for the one or more D2D UEs.

Example 14 includes the apparatus of example 1, wherein the one or more processors and memory are further configured to configure the logical transmission areas applied over the SCI resource pool and the data resource pool configuration.

Example 15 includes the apparatus of example 1 or 14, wherein the one or more processors and memory are further configured to place a higher layer control signaling protocol in a Physical Sidelink Broadcast Channel (PSBCH), a Master Information Block (MIB), a System Information Block (SIB), or UE-specific dedicated RRC signaling.

Example 16 includes the apparatus of example 1, wherein the one or more processors and memory are further configured to orthogonalize data transmissions between the UE and the one or more D2D UEs for SCI and data transmissions.

Example 17 includes the apparatus of example 1 or 16, wherein the one or more processors and memory are further configured to select physical resources for SCI transmission and data transmission from a subset of physical resources, the former physical resources being orthogonal to SCI resources used by the first transmission of the UE and a time resource pattern for transmission (T-RPT).

Example 18 includes the apparatus of example 1, wherein the one or more processors and memory are further configured to set the SCI format by setting a time resource pattern (T-RPT) index for transmission to a reserved value, or scrambling the SCI payload or Cyclic Redundancy Check (CRC) with a predefined sequence.

Example 19 includes the apparatus of example 1 or 18, wherein the one or more processors and memory are further configured to allocate a dedicated resource pool for SCI format.

Example 20 includes the apparatus of example 1, wherein the apparatus comprises at least one of the following and combinations thereof: an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, a baseband processor, internal memory, a non-volatile memory port.

Example 21 includes at least one machine-readable storage medium having instructions embodied thereon for controlling signaling for enhanced device-to-device (D2D) communication with a User Equipment (UE) operating in mode-2, the instructions when executed performing the operations of: using the bitmap to identify SCI periods to exchange secondary link control information (SCI) transmission resources with one or more D2DUE to negotiate physical resources for bi-directional SCI transmission and SCI reception; determining physical resource allocation for SCI communications based on the exchange; processing the SCI for transmission to one or more D2D UEs within the selected SCI period; and processing the D2D UE SCI received from the D2D UE at the UE for the selected SCI period.

Example 22 includes the at least one machine-readable storage medium of example 21, further comprising instructions that when executed perform the following: the control information is sent using a dedicated SCI format.

Example 23 includes the at least one machine-readable storage medium of example 21 or 22, further comprising instructions that when executed perform the following: control information is processed with feedback for transmission to one or more D2D UEs during the selected SCI period, the feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK) signal, channel State Information (CSI), and a Channel Quality Indicator (CQI).

Example 24 includes the at least one machine-readable storage medium of example 21, further comprising instructions that when executed perform the following: SCI received from one or more D2D UEs is processed with an acknowledgement (ACK/NACK) signal, channel State Information (CSI), and Channel Quality Indicator (CQI).

Example 25 includes the at least one machine-readable storage medium of example 21 or 24, further comprising instructions that when executed perform the following: control information is processed with feedback for transmission to one or more D2D UEs during the selected SCI period, the feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK) signal, channel State Information (CSI), and a Channel Quality Indicator (CQI).

Example 26 includes the at least one machine-readable storage medium of example 21, further comprising instructions that when executed perform the following: the control information is sent using a higher layer control signaling protocol.

Example 27 includes the at least one machine-readable storage medium of examples 21 or 26, further comprising instructions that when executed perform the following: higher layer control signaling is encoded and processed in a Physical Sidelink Shared Channel (PSSCH) or a Physical Sidelink Discovery Channel (PSDCH).

Example 28 includes an apparatus of a User Equipment (UE) configured for control signaling for enhanced device-to-device (D2D) communication, the apparatus comprising one or more processors and memory configured to: processing a blind Sidelink Control Information (SCI) transmission with D2D control information received from a second UE in a Physical Sidelink Control Channel (PSCCH); processing broadcast data received from the second UE in a Physical Sidelink Shared Channel (PSSCH) in accordance with the SCI transmission; and processing the D2D control information with feedback for transmission to the second UE, the feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK), channel State Information (CSI), and a Channel Quality Indicator (CQI). The broadcast data and the broadcast control information are processed using one or more of a baseband processor or an application processor.

Example 29 includes an apparatus of a User Equipment (UE) configured for control signaling for enhanced device-to-device (D2D) communication, the apparatus comprising one or more processors and memory configured to: exchanging secondary link control information (SCI) transmission resources with one or more D2D UEs to negotiate physical resources for bi-directional SCI transmission and SCI reception; determining physical resource allocation for SCI communication based on the exchange to identify a selected SCI period for the UE; processing the SCI to enable transmission to one or more D2D UEs within the selected SCI period; and processing the D2DUE SCI received from the one or more D2D UEs at the UE for the selected SCI period.

Example 30 includes the apparatus of example 29, wherein the one or more processors and memory are further configured to transmit the control information using a dedicated SCI format.

Example 31 includes the apparatus of example 29, wherein the one or more processors and memory are further configured to process the control information with feedback for transmission to the one or more D2D UEs during the selected SCI period, the feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK) signal, channel State Information (CSI), and a Channel Quality Indicator (CQI).

Example 32 includes the apparatus of example 29, wherein the one or more processors and memory are further configured to process SCI received from the one or more D2D UEs with an acknowledgement (ACK/NACK) signal, channel State Information (CSI), and Channel Quality Indicator (CQI).

Example 33 includes the apparatus of example 29, wherein the one or more processors and memory are further configured to process the control information with feedback for transmission to the one or more D2D UEs during the selected SCI period, the feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK) signal, channel State Information (CSI), and Channel Quality Indicator (CQI).

Example 34 includes the apparatus of example 29, wherein the one or more processors and memory are further configured to transmit the control information using a higher layer control signaling protocol.

Example 35 includes the apparatus of example 34, wherein the one or more processors and memory are further configured to encode and process higher layer control signaling in a Physical Sidelink Shared Channel (PSSCH) or a physical sidelink discovery channel PSDCH.

Example 36 includes the apparatus of example 35, wherein the one or more processors and memory are further configured to include in the control message at least one of, or a combination of, the following: acknowledgement/negative acknowledgement (ACK/NACK), channel State Information (CSI), channel Quality Indicator (CQI), precoding index, rank, target Modulation and Coding Scheme (MCS), index of time resource pattern for transmission (T-RPT), frequency allocation, SCI resource index.

Example 37 includes the apparatus of example 29, wherein the one or more processors and memory are further configured to include resource scheduling information for the one or more D2D UEs in the control message.

Example 38 includes the apparatus of example 37, wherein the one or more processors and memory are further configured to configure the physical resources of the logical cycle for transmitting the data.

Example 39 includes the apparatus of example 38, wherein the logic period is a multiple or fraction of the SCI period.

Example 40 includes the apparatus of example 29, wherein the one or more processors and memory are further configured to identify the selected SCI period using a bitmap to activate or deactivate the SCI period.

Example 41 includes the apparatus of example 40, wherein the one or more processors and memory are further configured to configure the physical resources with a SCI resource index and a time resource pattern for transmission (T-RPT) for one or more D2D UEs.

Example 42 includes the apparatus of example 29, wherein the one or more processors and memory are further configured to configure the logical transmission areas employed on the SCI resource pool and the data resource pool configuration.

Example 43 includes the apparatus of example 42, wherein the one or more processors and memory are further configured to place a higher layer control signaling protocol in a Physical Sidelink Broadcast Channel (PSBCH), a Master Information Block (MIB), a System Information Block (SIB), or UE-specific dedicated RRC signaling.

Example 44 includes the apparatus of example 29, wherein the one or more processors and memory are further configured to orthogonalize data transmissions between the UE and the one or more D2D UEs for SCI and data transmissions.

Example 45 includes the apparatus of example 29, wherein the one or more processors and memory are further configured to select physical resources for SCI transmission and data transmission from a subset of physical resources, wherein a previous physical resource is orthogonal to SCI resources used for a first transmission of the UE and a time resource pattern (T-RPT) for the transmission.

Example 46 includes the apparatus of example 29, wherein the one or more processors and memory are further configured to set the SCI format by setting a time resource pattern (T-RPT) index for transmission to a reserved value, or scrambling the SCI payload or Cyclic Redundancy Check (CRC) with a predefined sequence.

Example 47 includes the apparatus of example 29, wherein the one or more processors and memory are further configured to allocate a dedicated resource pool for SCI format.

Example 48 includes the apparatus of example 29, wherein the apparatus comprises at least one of the following and combinations thereof: an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, a baseband processor, internal memory, a non-volatile memory port.

Example 49 includes one or more transitory or non-transitory machine-readable storage media having instructions embodied thereon for controlling signaling for enhanced device-to-device (D2D) communication with a User Equipment (UE) operating in mode-2, the instructions when executed perform the following: using the bitmap to identify SCI periods to exchange secondary link control information (SCI) transmission resources with one or more D2D UEs to negotiate physical resources for bi-directional SCI transmission and SCI reception; determining physical resource allocation for SCI communications based on the exchange; processing the SCI for transmission to one or more D2D UEs within the selected SCI period; and processing the D2D UE SCI received from the D2D UE at the UE for the selected SCI period.

Example 50 includes the one or more transitory or non-transitory machine-readable storage media of example 49, further comprising instructions that when executed perform the following: the control information is sent using a dedicated SCI format.

Example 51 includes the one or more transitory or non-transitory machine-readable storage media of example 49, further comprising instructions that when executed perform the following: control information is processed with feedback for transmission to one or more D2D UEs during the selected SCI period, the feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK) signal, channel State Information (CSI), and a Channel Quality Indicator (CQI).

Example 52 includes the one or more transitory or non-transitory machine-readable storage media of example 49, further comprising instructions that when executed perform the following: SCI received from one or more D2DUE is processed with an acknowledgement (ACK/NACK) signal, channel State Information (CSI), and Channel Quality Indicator (CQI).

Example 53 includes the one or more transitory or non-transitory machine-readable storage media of example 49, further comprising instructions that when executed perform the following: control information is processed with feedback for transmission to one or more D2D UEs during the selected SCI period, the feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK) signal, channel State Information (CSI), and a Channel Quality Indicator (CQI).

Example 54 includes the one or more transitory or non-transitory machine-readable storage media of example 49, further comprising instructions that when executed perform the following: the control information is sent using a higher layer control signaling protocol.

Example 55 includes the one or more transitory or non-transitory machine-readable storage media of example 49, further comprising instructions that when executed perform the following: higher layer control signaling is encoded and processed in a Physical Sidelink Shared Channel (PSSCH) or a Physical Sidelink Discovery Channel (PSDCH).

Example 56 includes an apparatus of a User Equipment (UE) configured for control signaling for enhanced device-to-device (D2D) communication, the apparatus comprising one or more processors and memory configured to: processing a blind secondary link control information (SCI) transmission received from a second UE in a physical secondary link control channel (PSCCH) with D2D control information; processing broadcast data received from the second UE in a Physical Sidelink Shared Channel (PSSCH) in accordance with the SCI transmission; and processing the D2D control information with feedback for transmission to the second UE, the feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK), channel State Information (CSI), and a Channel Quality Indicator (CQI).

Example 57 includes an apparatus of a User Equipment (UE) configured for control signaling for enhanced device-to-device (D2D) communication, the apparatus comprising one or more processors and memory configured to: exchanging secondary link control information (SCI) transmission resources with one or more D2D UEs to negotiate physical resources for bi-directional SCI transmission and SCI reception; determining physical resource allocation for SCI communication based on the exchange to identify a selected SCI for the UE; processing the SCI for transmission to one or more D2D UEs within the selected SCI period; and processing the D2D UE SCI received from the D2D UE at the UE within the selected SCI period.

Example 58 includes the apparatus of example 57, wherein the one or more processors and memory are further configured to: transmitting control information using a dedicated SCI format; processing control information with feedback for transmission to the one or more D2D UEs during the selected SCI period, the feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK) signal, channel State Information (CSI), and a Channel Quality Indicator (CQI); receiving SCI with ACK/NACK signals, CSI and CQI from one or more D2D UEs; processing control information with feedback for transmission to the one or more D2D UEs during the selected SCI period, the feedback including at least an ACK/NACK signal, CSI, or CQI; or using higher layer control signaling protocols.

Example 59 includes the apparatus of example 57 or 58, wherein the one or more processors or memory are further configured to encode and process higher layer control signaling in a Physical Sidelink Shared Channel (PSSCH) or a Physical Sidelink Discovery Channel (PSDCH).

In example 60, the subject matter of example 57 or any of the examples described herein can further comprise: wherein the one or more processors and memory are further configured to include in the control information at least one of or a combination of: acknowledgement/negative acknowledgement (ACK/NACK), channel State Information (CSI), channel Quality Indicator (CQI), precoding index, rank, target Modulation and Coding Scheme (MCS), index of time resource pattern for transmission (T-RPT), frequency allocation, SCI resource index.

In example 61, the subject matter of example 57 or any of the examples described herein can further include: wherein the one or more processors and memory are further configured to: including resource scheduling information for one or more D2D UEs in the control information; configuring a physical resource of a logical period for transmitting data, wherein the logical period is a multiple or fraction of the SCI period; using a bitmap to identify the selected SCI periods to activate or deactivate SCI periods; or configure physical resources with SCI resource index and time resource pattern for transmission (T-RPT) for one or more D2D UEs.

In example 62, the subject matter of example 57 or any of the examples described herein can further include: wherein the one or more processors and memory are further configured to: a logic transmission area adopted on SCI resource pool and data resource pool configuration is configured; placing higher layer control signaling protocols in a Physical Sidelink Broadcast Channel (PSBCH), a Master Information Block (MIB), a System Information Block (SIB), or UE-specific dedicated RRC signaling; or orthogonalize data transmissions between the UE and one or more D2D UEs for SCI and data transmission.

In example 63, the subject matter of example 57 or any examples described herein can further include: wherein the one or more processors and memory are further configured to select physical resources for SCI transmission and data transmission from a subset of physical resources orthogonal to SCI resources used for a first transmission of the UE and a time resource pattern for transmission (T-RPT).

In example 64, the subject matter of example 57 or any of the examples described herein can further include: wherein the one or more processors or memories are further configured to: setting a Cyclic Redundancy Check (CRC) format by setting a time resource pattern (T-RPT) index for transmission to a reserved value or scrambling the SCI payload or CRC with a predefined sequence; or allocate a dedicated resource pool for SCI format.

In example 65, the subject matter of example 57 or any of the examples described herein can further include: wherein the apparatus comprises at least one of an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, a baseband processor, an internal memory, a non-volatile memory port, and combinations thereof.

Example 66 includes one or more transitory or non-transitory machine-readable storage media having instructions embodied thereon for controlling signaling for enhanced device-to-device (D2D) communication with a User Equipment (UE) operating in mode-2, the instructions when executed perform the following: using the bitmap to identify SCI periods to exchange secondary link control information (SCI) transmission resources with one or more D2D UEs to negotiate physical resources for bi-directional SCI transmission and SCI reception; determining physical resource allocation for SCI communications based on the exchange; processing the SCI for transmission to one or more D2D UEs within the selected SCI period; and processing SCI received at the UE from the D2D UE over the selected SCI period.

Example 67 includes the one or more transitory or non-transitory machine-readable storage media of example 66, further comprising instructions that when executed perform the following: transmitting control information using a dedicated SCI format; processing control information with feedback for transmission to the one or more D2D UEs during the selected SCI period, the feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK) signal, channel State Information (CSI), and a Channel Quality Indicator (CQI); and transmitting the control information using a higher layer control signaling protocol.

Example 68 includes the one or more transitory or non-transitory machine-readable storage media of examples 66 or 67, further comprising instructions that when executed perform the following: SCI received from one or more D2D UEs is processed with an acknowledgement (ACK/NACK) signal, channel State Information (CSI), and Channel Quality Indicator (CQI).

In example 69, the subject matter of example 66 or any examples described herein can further include: further comprising instructions that when executed perform the following: control information is processed with feedback for transmission to the one or more D2D UEs during the selected SCI period, the feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK) signal, channel State Information (CSI), and a Channel Quality Indicator (CQI).

In example 70, the subject matter of example 66 or any of the examples described herein can further include: further comprising instructions that when executed perform the following: higher layer control signaling is encoded and processed in a Physical Sidelink Shared Channel (PSSCH) or a Physical Sidelink Discovery Channel (PSDCH).

Example 71 includes an apparatus of a User Equipment (UE) configured for control signaling for enhanced device-to-device (D2D) communication, the apparatus comprising one or more processors and memory configured to: processing a blind secondary link control information (SCI) transmission received from a second UE in a physical secondary link control channel (PSCCH) with D2D control information; processing broadcast data received from the second UE in a Physical Sidelink Shared Channel (PSSCH) in accordance with the SCI transmission; and processing the D2D control information with feedback for transmission to the second UE, the feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK), channel State Information (CSI), and a Channel Quality Indicator (CQI).

Example 72 includes an apparatus for control signaling for enhanced device-to-device (D2D) communication with a User Equipment (UE) operating in mode-2, the apparatus comprising: means for identifying SCI periods using a bitmap to exchange secondary link control information (SCI) transmission resources with one or more D2D UEs to negotiate physical resources for bi-directional SCI transmission and SCI reception; means for determining physical resource allocation for SCI communications based on the exchange; means for transmitting SCI to one or more D2D UEs within the selected SCI period; and means for receiving SCI from one or more D2D UEs within the selected SCI period.

Example 73 includes the apparatus of example 72, further comprising means for transmitting the control information using a dedicated SCI format.

Example 74 includes the apparatus of example 72, further comprising means for transmitting control information with feedback to the one or more D2D UEs during the selected SCI period, the feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK) signal, channel State Information (CSI), and a Channel Quality Indicator (CQI).

Example 75 includes the apparatus of example 72, further comprising means for receiving SCI from the one or more D2D UEs, the SCI having an acknowledgement/negative acknowledgement (ACK/NACK) signal, channel State Information (CSI), and a Channel Quality Indicator (CQI).

Example 76 includes the apparatus of example 72, further comprising means for transmitting control information with feedback to the one or more D2D UEs during the selected SCI period, the feedback including at least an acknowledgement/negative acknowledgement (ACK/NACK) signal, channel State Information (CSI), and a Channel Quality Indicator (CQI).

Example 77 includes the apparatus of example 72, further comprising means for transmitting the control information using a higher layer control signaling protocol.

Example 78 includes the apparatus of example 72, further comprising means for encoding and transmitting higher layer control signaling in a Physical Sidelink Shared Channel (PSSCH) or a Physical Sidelink Discovery Channel (PSDCH).

The various techniques, or certain aspects or portions thereof, may take the form of program code (i.e., instructions) embodied in tangible media, such as floppy diskettes, compact disk read-only memories (CD-ROMs), hard drives, non-transitory computer-readable mechanisms, or any other machine-readable storage medium, wherein, when the program code is loaded into and executed by a machine, such as a computer, the machine becomes an apparatus for practicing the various techniques. The circuitry may include hardware, firmware, program code, executable code, computer instructions, and/or software. The non-transitory computer readable storage medium may be a computer readable storage medium that does not include a signal. In the case of program code execution on programmable computers, the computing device can include a processor, a storage medium readable by the processor (including volatile and non-volatile memory and/or storage elements), at least one input device, and at least one output device. The volatile and nonvolatile memory and/or storage elements may be Random Access Memory (RAM), erasable programmable read-only memory (EPROM), flash memory drives, optical drives, magnetic hard disk drives, solid-state drives, or other media for storing electronic data. The node and wireless device may also include a transceiver module (i.e., transceiver), a counter module (i.e., counter), a processing module (i.e., processor), and/or a clock module (i.e., clock) or a timer module (i.e., timer). One or more programs that may implement or utilize the various techniques described herein may use an Application Programming Interface (API), reusable controls, or the like. Such programs may be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. Regardless, the language may be a compiled or interpreted language, and combined with hardware implementations.

As used herein, the term "processor" may include general-purpose processors, special-purpose processors (such as VLSI, FPGA, or other type of special-purpose processor), and baseband processors in transceivers for transmitting, receiving, and processing wireless communications.

It should be appreciated that many of the functional units described in this specification have been labeled as modules, in order to more particularly emphasize their implementation independence. For example, a module may be implemented as a hardware circuit comprising custom large scale integration (VLSI) circuits or gate arrays, as a semiconductor such as a logic chip, a transistor, or as other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.

Modules may also be implemented in software for execution by various types of processors. An identified module of executable code may, for instance, comprise one or more physical or logical blocks of computer instructions which may, for instance, be organized as an object, procedure, or function. However, the executables of an identified module may not be physically located together, but may comprise disparate instructions stored in different locations which, when joined logically together, comprise the module and achieve the stated purpose for the module.

Indeed, a module of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Similarly, operational data may be identified and illustrated herein within modules, and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different storage devices. The modules may be passive or active, including agents operable to perform desired functions.

In this specification, reference to "exemplary" or "illustrative" means that a particular feature, structure, or characteristic described in connection with the example is included in at least one example of the present technology. Thus, the appearances of the phrase "in an example" or the word "exemplary" in various places throughout this specification are not necessarily all referring to the same embodiment.

As used herein, a plurality of items, structural elements, compositional elements, and/or materials may be presented in a common list for convenience. However, these lists should be construed as though each member of the list is individually identified as a separate and unique member. Thus, no individual member of such list should be construed as a de facto equivalent of any other member of the same list solely based on their presentation in a common group without indications to the contrary. Furthermore, various embodiments and examples of the present technology may be mentioned along with alternatives to its various components. It should be understood that such embodiments, examples, and alternatives are not to be construed as actual equivalents of each other, but are to be considered separate and autonomous representations of the present technology.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided, such as examples of arrangements, distances, network examples, etc., to provide a thorough understanding of the technical embodiments. However, one skilled in the relevant art will recognize that the technology can be practiced without one or more of the specific details, or with other methods, components, arrangements, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the technology.

While the foregoing examples illustrate the principles of the technology in one or more particular applications, it will be apparent to those of ordinary skill in the art that various modifications in the use and details of implementation may be made without departing from the principles and concepts of the technology. Accordingly, it is not intended that the technology be limited, except as by the claims set forth below.

Claims

1. A User Equipment (UE) configured for Sidelink (SL) communication, comprising:

one or more processors configured to:

receiving first Sidelink Control Information (SCI) from a first UE, the first SCI indicating a first physical resource in use used by the first UE for the SL communication, wherein the first physical resource is configured for a first data communication in a first time period;

Identifying, based on the first SCI, one or more resources orthogonal or quasi-orthogonal to the first physical resource for generating a second data communication in the first time period;

determining physical resource allocation for a second SCI and the second data communication based on the one or more resources; and

generating the second SCI and the second data communication for the SL communication based on the physical resource allocation; and

radio Frequency (RF) circuitry configured to transmit the SL communication.

2. The UE of claim 1, wherein the first physical resource comprises, at least in part, a resource used by the first UE for transmission to the first SCI of the UE.

3. The UE of claim 1, wherein the one or more processors are further configured to:

an Acknowledgement (ACK)/Negative Acknowledgement (NACK) signal in the SL communication is transmitted to the first UE based on the physical resource allocation.

4. The UE of claim 1, wherein the one or more processors are further configured to:

based on the determined physical resource allocation, a Channel Quality Indicator (CQI) for the SL communication is sent to the first UE.

5. The UE of claim 1, wherein the one or more processors are further configured to:

receiving feedback responsive to said second SCI, said feedback enabling link adaptation.

6. The UE of claim 1, wherein the SL communication comprises a mode-2 communication configured based on a sidelink resource allocation for mode-2.

7. The UE of claim 1, wherein the one or more processors are further configured to:

a time resource pattern (T-RPT) for transmission is randomly selected from a set of resource patterns based on a reduced subset of resources, wherein each resource pattern in the set of resource patterns comprises a subset of mutually orthogonal patterns.

8. The UE of claim 1, wherein the one or more processors are further configured to:

a dedicated SCI format is received, which is used to send feedback including an ACK/NACK signal.

9. A method for a User Equipment (UE) for Sidelink (SL) communication, comprising:

receiving first Sidelink Control Information (SCI), the first SCI indicating a first physical resource in use for the SL communication by a first UE, wherein the first physical resource is configured for a first data communication in a first time period;

determining a physical resource allocation for at least one of a second SCI or the second data communication based on the one or more resources; and

generating the second SCI or the second data communication for the SL communication based on the physical resource allocation.

10. The method of claim 9, wherein the first physical resource comprises, at least in part, a resource used by the first UE for transmission of the first SCI.

11. The method of claim 9, further comprising:

12. The method of claim 9, further comprising:

13. The method of claim 9, further comprising:

14. The method of claim 9, further comprising:

15. The method of claim 9, further comprising:

16. A baseband processor configured for Sidelink (SL) communication, the baseband processor configured to:

generating the second SCI and the second data communication for the SL communication based on the physical resource allocation.

17. The baseband processor of claim 16, wherein the first physical resource comprises at least in part a resource used by the first UE for transmission to the first SCI of the UE.

18. The baseband processor of claim 16, wherein the baseband processor is further configured to:

19. The baseband processor of claim 16, wherein the baseband processor is further configured to:

20. The baseband processor of claim 16, wherein the baseband processor is further configured to: