CN111083645A - Service sending method, device and terminal - Google Patents

Service sending method, device and terminal Download PDF

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Publication number
CN111083645A
CN111083645A CN201811224703.7A CN201811224703A CN111083645A CN 111083645 A CN111083645 A CN 111083645A CN 201811224703 A CN201811224703 A CN 201811224703A CN 111083645 A CN111083645 A CN 111083645A
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CN
China
Prior art keywords
resource
transmitting
transmission power
power
transmission
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CN201811224703.7A
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Chinese (zh)
Inventor
冯媛
赵锐
郑方政
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电信科学技术研究院有限公司
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Priority to CN201811224703.7A priority Critical patent/CN111083645A/en
Publication of CN111083645A publication Critical patent/CN111083645A/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30Services specially adapted for particular environments, situations or purposes
    • H04W4/40Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
    • H04W72/04Wireless resource allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation where an allocation plan is defined based on the type of the allocated resource
    • H04W72/0473Wireless resource allocation where an allocation plan is defined based on the type of the allocated resource the resource being transmission power
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
    • H04W72/12Dynamic Wireless traffic scheduling ; Dynamically scheduled allocation on shared channel
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
    • H04W72/12Dynamic Wireless traffic scheduling ; Dynamically scheduled allocation on shared channel
    • H04W72/1205Schedule definition, set-up or creation
    • H04W72/1226Schedule definition, set-up or creation based on channel quality criteria, e.g. channel state dependent scheduling

Abstract

The invention discloses a service sending method, a service sending device and a terminal. The service sending method comprises the following steps: when a unicast/multicast service is transmitted on a preset transmitting resource, determining the corresponding transmitting power of the preset transmitting resource; and transmitting the unicast/multicast service on the preset transmission resource according to the transmission power, wherein the transmission power is less than the maximum transmission power configured by the system. The scheme of the invention meets the communication requirement of unicast/multicast through power control.

Description

Service sending method, device and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a service sending method, an apparatus, and a terminal.

Background

The V2X (vehicle to vehicle information exchange) technology can sense the surrounding conditions of vehicles in real time, share road information and perform early warning in time by means of wireless communication between vehicles, vehicle and drive test infrastructure, and vehicles and passersby, and has become a research hotspot for solving the problem of road safety in countries in the world at present.

In the existing LTE V2X technology (Rel-14LTE V2X technology), a PC5 interface (also called a direct link, described as sildelink in the protocol) for transmitting data between a UE (User Equipment or terminal) and the UE can already support transmission of basic traffic based on road security. The method mainly aims to the service package with the data package size of 50-1200bytes, and the transmission reliability of the required service package in the specified coverage is more than 95%.

With the further development of the car networking technology, some new application scenarios appear, such as: vehicle formation, advanced driving, sensor information sharing, remote control, and the like. Some of these applications require communication between UEs within a group, or unicast communication between two UEs. Therefore, the V2X system needs to consider unicast and multicast scenarios, however, no solution is currently available in the industry how to implement unicast or multicast communication between UEs.

For unicast and multicast scenarios, the communication requirements change, for unicast, the communication distance range requirements depend on the location of the node establishing the connection; for multicast, it depends on the length of the fleet. This minimum requirement is not directly related to vehicle speed and system congestion, and communication distance range is a parameter of quality of service (QoS). Although the communication range of unicast/multicast is different from that of broadcast, the broadcast is related to the congestion vehicle speed equation and is not related to traffic, but the unicast/multicast may have different communication requirements for different applications.

How to meet the requirement of unicast/multicast communication distance range does not have a specific scheme at present.

Disclosure of Invention

The embodiment of the invention provides a service sending method, a service sending device and a terminal. The unicast/multicast communication requirements are met by power control.

In order to solve the above technical problem, an embodiment of the present invention provides the following technical solutions:

a service transmission method is applied to a transmission terminal supporting a V2X service, and comprises the following steps:

when a unicast/multicast service is transmitted on a preset transmitting resource, determining the corresponding transmitting power of the preset transmitting resource;

and transmitting the unicast/multicast service on the preset transmission resource according to the transmission power, wherein the transmission power is less than the maximum transmission power configured by the system.

Determining the transmission power corresponding to the predetermined transmission resource includes:

determining the transmitting power of a physical direct link control channel (PSCCH) and the transmitting power of a physical direct link shared channel (PSSCH) corresponding to the predetermined transmitting resource;

wherein the transmit power of the PSSCH is indicated by the PSCCH; the sum of the transmission power of the PSCCH and the transmission power of the PSSCH is less than the maximum transmission power configured by the system.

Wherein, determining the transmission power of the physical direct link control channel PSCCH and the transmission power of the physical direct link shared channel PSCCH corresponding to the predetermined transmission resource comprises:

the preset sending resource is selected autonomously from a shared sending resource pool or a dedicated time division resource pool of the unicast/multicast service and the broadcast service configured by the system or selected in a network equipment scheduling mode;

and controlling and processing the transmitting power of a physical straight-through link control channel (PSCCH) and the transmitting power of a physical straight-through link shared channel (PSSCH) corresponding to the preset transmitting resource to obtain the transmitting power for transmitting the unicast/multicast service.

Wherein, controlling the transmitting power of the physical through link control channel PSCCH and the transmitting power of the physical through link shared channel PSCCH corresponding to the predetermined transmitting resource to obtain the transmitting power for transmitting the unicast/multicast service comprises:

and reducing the transmission power of the PSCCH and the transmission power of the PSSCH to obtain the transmission power for transmitting the unicast/multicast service, wherein an offset meeting the PSD is formed between the transmission power of the PSCCH and the transmission power of the PSSCH.

Wherein, determining the transmission power of the physical direct link control channel PSCCH and the transmission power of the physical direct link shared channel PSCCH corresponding to the predetermined transmission resource comprises:

selecting the predetermined transmission resource from a dedicated time division transmission resource pool configured for the unicast/multicast service; one time division transmission resource pool is configured with the transmission power of a unicast/multicast service;

determining the transmitting power of a physical straight-through link control channel (PSCCH) and the transmitting power of a physical straight-through link shared channel (PSSCH) corresponding to the preset transmitting resource according to the transmitting power configured by the time division transmitting resource pool; the PSCCH transmission power and the PSSCH transmission power have an offset between them that satisfies the PSD.

Wherein, determining the transmission power of the physical through link control channel PSCCH and the transmission power of the physical through link shared channel PSCCH corresponding to the predetermined transmission resource comprises:

the preset sending resource is selected from a shared sending resource pool of the unicast/multicast service and the broadcast service configured by the system;

keeping the transmission power of the physical direct link control channel PSCCH corresponding to the preset transmission resource unchanged and reducing the transmission power of the physical direct link shared channel PSSCH.

Wherein, selecting the predetermined transmission resource by a network device scheduling manner includes:

sending resource scheduling request information to a network device, wherein the resource scheduling request information comprises: at least one of an expected transmit power, a quality of service QoS parameter including a communication distance range, and a resource reuse geographical range;

and receiving a scheduling signaling sent by the network equipment, and determining the preset sending resource configured by the network equipment according to the scheduling request information according to the scheduling signaling.

The sending of the resource scheduling request information to the network device includes:

and sending the resource scheduling request information to the network equipment through the auxiliary information of the user equipment or the through link user information or a media access control unit (MACCE).

For unicast service, a communication distance range containing QoS parameters is determined by a high layer, the communication distance range is obtained through information related to basic safety service, and the expected sending power is determined according to correct receiving of a target terminal under a corresponding link;

for multicast services, the communication distance range is the farthest distance between vehicles in the group, and the expected transmission power is determined according to the worst channel quality between links in the group.

And when the network equipment configures the preset sending resources according to the scheduling request information, the network equipment allocates the same time-frequency resources to terminals with the same communication distance range or the same expected sending power or with the difference smaller than a preset value.

When the scheduled transmission resource is selected autonomously from a shared transmission resource pool of unicast/multicast service and broadcast service configured by a system, the scheduled transmission resource is: the resource with the same transmission power as the resource of the terminal for sending the unicast/multicast service last time, or the resource with the difference value of the transmission power of the resource of the terminal for sending the unicast/multicast service last time smaller than a preset value.

And if the difference value comprises a plurality of difference values, selecting the resource with the minimum difference value as the preset sending resource.

An embodiment of the present invention further provides a terminal, including:

a processor, configured to determine a transmission power corresponding to a predetermined transmission resource when transmitting a unicast/multicast service on the predetermined transmission resource;

and the transceiver is used for transmitting the unicast/multicast service on the preset transmission resource according to the transmission power, wherein the transmission power is less than the maximum transmission power configured by the system.

An embodiment of the present invention further provides a service sending apparatus, including:

the processing module is used for determining the corresponding transmitting power of the preset transmitting resource when the unicast/multicast service is transmitted on the preset transmitting resource;

and the transceiver module is used for transmitting the unicast/multicast service on the preset transmission resource according to the transmission power, wherein the transmission power is less than the maximum transmission power configured by the system.

An embodiment of the present invention further provides a terminal, including: a processor configured to perform the following functions: when the unicast/multicast service is transmitted on the preset transmitting resource, the transmitting power corresponding to the preset transmitting resource is determined, the unicast/multicast service is transmitted on the preset transmitting resource according to the transmitting power, and the transmitting power is smaller than the maximum transmitting power configured by a system.

Embodiments of the present invention also provide a computer storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above.

The embodiment of the invention has the beneficial effects that:

in the above embodiment of the present invention, when a unicast/multicast service is transmitted on a predetermined transmission resource, the transmission power corresponding to the predetermined transmission resource is determined; and transmitting the unicast/multicast service on the preset transmission resource according to the transmission power, wherein the transmission power is less than the maximum transmission power configured by the system. The unicast and multicast are enabled to associate the service with the resource, and the resource is associated with the sending power, so that the communication requirement of unicast/multicast can be met through power control.

Drawings

Fig. 1 is a flowchart of a service transmission method according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a terminal according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

As shown in fig. 1, an embodiment of the present invention provides a service transmission method, which is applied to a transmission terminal supporting a V2X service, and the method includes:

step 11, when sending unicast/multicast service on the scheduled sending resource, determining the sending power corresponding to the scheduled sending resource;

and 12, transmitting the unicast/multicast service on the preset transmission resource according to the transmission power, wherein the transmission power is less than the maximum transmission power configured by the system.

In the above embodiment of the present invention, when a unicast/multicast service is transmitted on a predetermined transmission resource, the transmission power corresponding to the predetermined transmission resource is determined; and transmitting the unicast/multicast service on the preset transmission resource according to the transmission power, wherein the transmission power is less than the maximum transmission power configured by the system. The unicast and multicast are enabled to associate the service with the resource, and the resource is associated with the sending power, so that the communication requirement of unicast/multicast can be met through power control.

In a specific embodiment of the present invention, in the step 11, the determining the transmission power corresponding to the predetermined transmission resource includes:

determining the transmission power of a PSCCH (physical downlink Control Channel) and the transmission power of a PSCCH (physical direct link shared Channel) corresponding to the predetermined transmission resource;

wherein the transmit power of the PSSCH is indicated by the PSCCH; for example, the indication of increasing the transmission power of the PSCCH in an SCI (System control information) is that the sum of the transmission power of the PSCCH and the transmission power of the PSCCH is less than the maximum transmission power configured by the System. The SCI indication may further include: at least one of a communication distance range, a resource reuse geographical range, and unicast/multicast traffic.

In an implementation manner of the above embodiment of the present invention: in step 11, determining the transmission power of the physical through link control channel PSCCH and the transmission power of the physical through link shared channel PSCCH corresponding to the predetermined transmission resource includes:

step 111, selecting the predetermined transmission resource autonomously from a shared transmission resource pool or a dedicated time division resource pool of the unicast/multicast service and the broadcast service configured by the system or selecting the predetermined transmission resource in a network equipment scheduling manner;

step 112, performing control processing on the transmission power of the physical direct link control channel PSCCH and the transmission power of the physical direct link shared channel PSCCH corresponding to the predetermined transmission resource to obtain the transmission power for transmitting the unicast/multicast service;

specifically, the controlling the transmission power of the PSCCH and the transmission power of the PSCCH corresponding to the predetermined transmission resource may include: the sending power of the PSCCH and the sending power of the PSCCH may be reduced to obtain the sending power for sending the unicast/multicast service, and an offset that satisfies a PSD (power spectral density) is provided between the sending power of the PSCCH and the sending power of the PSCCH. For example, the PSCCH has a PSD offset of 3dB compared to the PSCCH, but is not limited to a PSD offset of 3dB as long as the PSD requirement is satisfied.

In step 111, when the predetermined transmission resource is autonomously selected from a shared transmission resource pool of the unicast/multicast service and the broadcast service configured by the system, the predetermined transmission resource is: the resource with the same transmission power as the resource of the terminal for sending the unicast/multicast service last time, or the resource with the difference value of the transmission power of the resource of the terminal for sending the unicast/multicast service last time smaller than a preset value. And if the difference value comprises a plurality of difference values, selecting the resource with the minimum difference value as the preset sending resource.

In this step 111, selecting the predetermined transmission resource by a network device scheduling method includes:

step 1111, sending resource scheduling request information to the network device, where the resource scheduling request information includes: at least one of an expected transmit power, a quality of service QoS parameter including a communication distance range, and a resource reuse geographical range;

specifically, the resource scheduling request information may be sent to the network device through user equipment assistance information (UE assistance information), direct link user information (SidelinkUEInformation), or medium access control unit (MAC CE) signaling.

Step 1112, receiving a scheduling signaling sent by the network device, and determining the predetermined sending resource configured by the network device according to the scheduling request information according to the scheduling signaling.

For unicast service, a communication distance range containing QoS parameters is determined by a high layer, the communication distance range is obtained through information related to basic safety service, and the expected sending power is determined according to correct receiving of a target terminal under a corresponding link;

for multicast services, the communication distance range is the farthest distance between vehicles in the group, and the expected transmission power is determined according to the worst channel quality between links in the group.

And when the network equipment configures the preset sending resources according to the scheduling request information, the network equipment allocates the same time-frequency resources to terminals with the same communication distance range or the same expected sending power or with the difference smaller than a preset value.

In the scene, the transmission power is in direct proportion to the communication distance range and the resource multiplexing geographic range and in inverse proportion to the resource multiplexing coefficient; for example, if the transmission power 1 corresponding to the resource 1> the transmission power 2 corresponding to the resource 2, the communication distance range 1 corresponding to the transmission power 1> the communication distance range 2 corresponding to the transmission power 2, and if the resource multiplexing geographical range 1 of the resource 1> the resource multiplexing geographical range 2 of the resource 2, the resource multiplexing coefficient 1 of the resource 1< the resource multiplexing coefficient 2 of the resource 2. The resource may be a time Slot (Slot), and the predetermined transmission resource may be a time-frequency resource in the time Slot.

Specifically, the process of selecting the predetermined transmission resource by a network device scheduling manner, that is, the network device (for example, may be a base station) scheduling process may specifically include:

step 1: the UE informs the base station of the scheduling request information.

When requesting resources, for example, through UE assist information or sildenkuueinformation message or MAC CE, a unicast node or a multicast cluster head node (i.e., the UE) needs to inform the gNB/eNB of at least one of its expected transmission power, QoS parameters including a communication distance range, and a resource multiplexing geographical range.

For unicast, the communication distance range containing the QoS parameter is determined by a higher layer, the communication distance range is obtained by basic security service related information, and the expected transmission power is determined according to correct reception of a target terminal under a corresponding link.

For multicast, where the communication range is the farthest distance between vehicles in the group, similar transmit power determinations need to take into account the worst channel quality between links in the group. Considering the change of the channel quality, certain margin processing needs to be considered; further, when there is a channel quality change, the scheduling request message may also carry channel quality change information, and the eNB and the gNB determine whether to adjust the resources.

Step 2: the base station needs to consider the scheduling request information reported by the terminal when allocating resources.

The base station needs to consider the difference of communication ranges when allocating resources, and only consider nodes (i.e. terminals) allocated to the same or similar communication ranges/expected transmission power requirements for the same time slot resource.

Specifically, when the resource spatial multiplexing is considered, it can be considered that different multiplexing distances may exist for time-frequency resources on different time slots, where a mapping relationship between a time slot resource and a multiplexing distance is dynamic and is determined by a corresponding service of a node using a certain time-frequency resource. Once a resource is allocated to a service corresponding to a user, the multiplexing coefficient (multiplexing distance/transmission power range) corresponding to the timeslot where the resource is located is determined.

That is, when the base station allocates resources to the node, if spatial multiplexing or frequency division multiplexing needs to be considered, the related communication distance range requirement or the expected transmission requirement of the UE needs to be considered, and only the time-frequency resources with the same or similar communication distance requirement or transmission power can be considered for performing same-frequency or frequency division multiplexing.

And step 3: the terminal receives the scheduling signaling sent by the network device, where the scheduling signaling may be DCI (downlink control Information), and the DCI may also indicate corresponding sending power. If not, the UE transmits at the expected transmit power.

In another implementation of the above embodiment of the present invention: in step 11, determining the transmission power of the physical direct link control channel (PSCCH) and the transmission power of the physical direct link shared channel (PSCCH) corresponding to the predetermined transmission resource includes:

selecting the predetermined transmission resource from a dedicated time division transmission resource pool configured for the unicast/multicast service; one time division transmission resource pool is configured with the transmission power of a unicast/multicast service;

determining the transmission power of a physical direct link control channel (PSCCH) and the transmission power of a physical direct link shared channel (PSSCH) corresponding to the preset transmission resource according to the transmission power configured by the time division transmission resource pool; the PSCCH transmission power and the PSSCH transmission power have an offset between them that satisfies the PSD.

Specifically, the unicast/multicast adopts a dedicated time division transmission resource pool and is under the scene that the nodes autonomously select the resources:

determining the transmission power of a physical direct link control channel (PSCCH) and the transmission power of a physical direct link shared channel (PSSCH) corresponding to the preset transmission resource according to the transmission power configured by the time division transmission resource pool; in specific implementation, when a node selects a resource, the corresponding sending resource pool is determined according to the communication requirement of the node and the configuration of the special time division sending resource pool.

In another implementation manner of the above embodiment of the present invention: in step 11, determining the transmission power of the physical direct link control channel (PSCCH) and the transmission power of the physical direct link shared channel (PSCCH) corresponding to the predetermined transmission resource includes:

the preset sending resource is selected from a shared sending resource pool of the unicast/multicast service and the broadcast service configured by the system;

keeping the transmission power of a physical direct link control channel (PSCCH) corresponding to the predetermined transmission resource unchanged and reducing the transmission power of a physical direct link shared channel (PSSCH).

In this embodiment, the PSCCH has a constant transmit power, but the PSCCH reduces the transmit power, i.e., reduces the geographical range of resource reuse, increasing the resource reuse rate.

It should be noted that, in another embodiment of the present invention, in a scenario where the predetermined transmission resource is selected from a dedicated time-division transmission resource pool configured for the unicast/multicast service in a network device scheduling manner, a specific scheduling process is the same as the unicast/multicast and broadcast shared resource pool and the network device scheduling process;

it should be noted that, in the unicast/multicast, a dedicated frequency division transmission resource pool is used, and a node autonomously selects resources, and in the unicast/multicast, the dedicated frequency division transmission resource pool is used, and the network device is scheduled; the impact of IBE needs to be considered and since the independent resource pools are independently controlled, in this way, for unicast and multicast traffic, it is still necessary to transmit with maximum transmit power, the PSCCH and PSCCH are equally proportional after considering PSD, i.e. there is an offset between the transmit power of the PSCCH and the transmit power of the PSCCH that meets the PSD of the power spectral density.

In the above embodiment of the present invention, the unicast/multicast service is associated with the resource, and the resource is associated with the transmission power, where the association may be a static association (for example, a pre-configured manner is used to configure the corresponding transmission power for the dedicated time division resource pool), or a dynamic association (for example, the terminal determines the transmission power corresponding to the resource according to its own requirement). Therefore, the resource reuse geographical ranges corresponding to the resources are consistent, interference is reduced, and system capacity is improved.

When considering power control, it is considered that the PSCCH mainly plays a role of informing other nodes of self resource occupation, that is, in some scenarios, the transmission power of the PSCCH and the transmission power of the PSCCH may be controlled in a consistent manner, but in other scenarios, the transmission power of the PSCCH and the transmission power of the PSCCH need to be controlled in a differentiated manner. For example, there may be multiple implementations corresponding to different scenarios:

the first realization is as follows: the differentiating processing of the transmission power of the PSCCH and the transmission power of the PSSCH comprises the following steps: the transmission power of the PSCCH is unchanged, namely the corresponding resource multiplexing geographic range is unchanged, but the PSSCH reduces the transmission power, so that the resource multiplexing geographic range is reduced, and the resource multiplexing rate is increased.

Specifically, PSCCH and PSCCH are separated, and the traffic channel PSCCH reduces transmit power, but not on the control channel (PSCCH or dedicated control channel).

That is, the PSCCH makes other nodes sense the resource occupancy information according to the original transmission power. Meanwhile, certain indication is made on the transmission power on the PSSCH in the PSCCH; i.e., an indication to increase the psch transmit power in the SCI. That is, the capacity is not increased from the resource multiplexing point of view, but the interference on the PSSCH is reduced, and the capacity of the system is increased to a certain extent.

The specific sending power value is related to whether the PSCCH/PSSCH adopts a TDM (time division multiplexing) or FDM (frequency division multiplexing) mode, and under the condition that the R14per UE PSSCH/PSSCH adopts the FDM mode, the PSCCH has 3dB of PSDoffset compared with the PSSCH, and then is divided equally by PRBs (physical resource blocks). The transmission power of unicast/multicast is a relative value with respect to the broadcast traffic. Regardless of whether the mode of TDM or FDM is adopted by PSCCH/PSSCH in NR, for unicast/multicast, the PSCCH transmission power value is the same as that of broadcast, and for PSSCH, the transmission power value can be reduced according to requirements relative to broadcast service.

The receiving node can correspondingly process the PSSCH resource according to the analyzed PSCCH information, and if the same time slot resource is used, similar processing needs to be carried out on the part of PSSCH resource occupation, namely, only the nodes with the same or similar communication requirements can occupy the part of PSSCH resource.

Further, with the time slot as a unit, the time slot resource where the resource with a large communication distance range/transmission power difference is occupied is not considered when the resource is selected autonomously. Excluding the time slot resource where the resource with larger communication distance range/transmitting power difference is located, if the remaining resource is not enough to select, performing limited selection according to the difference value, and firstly selecting the resource with smaller difference value to perform frequency division multiplexing.

The second realization: the transmission power of the PSCCH is consistent with the transmission power of the PSSCH, the PSCCH and the PSSCH reduce the resource multiplexing geographic range and increase the resource multiplexing rate.

If the terminal autonomously selects the resources: in the case where dedicated time division transmission resource pools are pre-allocated, the control of the transmission power of the PSCCH and the control of the transmission power of the PSCCH may be performed on the maximum transmission power of the dedicated time division transmission resource pools, where different dedicated time division transmission resource pools are allocated with different maximum transmission powers.

If the resource is selected through a scheduling mode, namely the base station selects the resource: as described above for steps 1, 2 and 3 in the base station scheduling procedure.

In the embodiment of the invention, the power control of the PSCCH and the PSSCH is used as a switch and can be used only when a certain condition is met, so that the requirement of the unicast/multicast communication distance range can be met through the power control.

As shown in fig. 2, an embodiment of the present invention further provides a terminal 20, including:

a processor 22, configured to determine, when a unicast/multicast service is sent on a predetermined sending resource, a sending power corresponding to the predetermined sending resource;

a transceiver 21, configured to send the unicast/multicast service according to the sending power on the predetermined sending resource, where the sending power is less than a maximum sending power configured by a system.

Wherein the processor 22 is specifically configured to: determining the transmitting power of a physical direct link control channel (PSCCH) and the transmitting power of a physical direct link shared channel (PSSCH) corresponding to the predetermined transmitting resource;

wherein the transmit power of the PSSCH is indicated by the PSCCH; the sum of the transmission power of the PSCCH and the transmission power of the PSSCH is less than the maximum transmission power configured by the system.

The processor 22 is specifically configured to: the preset sending resource is selected autonomously from a shared sending resource pool or a dedicated time division resource pool of the unicast/multicast service and the broadcast service configured by the system or selected in a network equipment scheduling mode;

and controlling and processing the transmitting power of a physical straight-through link control channel (PSCCH) and the transmitting power of a physical straight-through link shared channel (PSSCH) corresponding to the preset transmitting resource to obtain the transmitting power for transmitting the unicast/multicast service.

The processor 22 controls the transmission power of the PSCCH corresponding to the predetermined transmission resource and the transmission power of the PSCCH to obtain a transmission power for transmitting the unicast/multicast service, and is specifically configured to: and reducing the transmission power of the PSCCH and the transmission power of the PSSCH to obtain the transmission power for transmitting the unicast/multicast service, wherein an offset meeting the PSD is formed between the transmission power of the PSCCH and the transmission power of the PSSCH.

The processor 22 is specifically configured to: selecting the predetermined transmission resource from a dedicated time division transmission resource pool configured for the unicast/multicast service; one time division transmission resource pool is configured with the transmission power of a unicast/multicast service;

determining the transmitting power of a physical straight-through link control channel (PSCCH) and the transmitting power of a physical straight-through link shared channel (PSSCH) corresponding to the preset transmitting resource according to the transmitting power configured by the time division transmitting resource pool; the PSCCH transmission power and the PSSCH transmission power have an offset between them that satisfies the PSD.

The processor 22 is specifically configured to: the preset sending resource is selected from a shared sending resource pool of the unicast/multicast service and the broadcast service configured by the system;

keeping the transmission power of the physical direct link control channel PSCCH corresponding to the preset transmission resource unchanged and reducing the transmission power of the physical direct link shared channel PSSCH.

The processor selects the predetermined transmission resource in a network device scheduling manner, and is specifically configured to:

controlling the transceiver to transmit resource scheduling request information to a network device, wherein the resource scheduling request information includes: at least one of an expected transmit power, a quality of service QoS parameter including a communication distance range, and a resource reuse geographical range;

the transceiver 21 receives a scheduling signaling sent by the network device, and determines the scheduled transmission resource configured by the network device according to the scheduling request information according to the scheduling signaling.

When the transceiver 21 sends the resource scheduling request information to the network device, it is specifically configured to: and sending the resource scheduling request information to the network equipment through the auxiliary information of the user equipment or the direct link user information or a Media Access Control (MAC) CE.

For unicast service, a communication distance range containing QoS parameters is determined by a high layer, the communication distance range is obtained through information related to basic safety service, and the expected sending power is determined according to correct receiving of a target terminal under a corresponding link;

for multicast services, the communication distance range is the farthest distance between vehicles in the group, and the expected transmission power is determined according to the worst channel quality between links in the group.

And when the network equipment configures the preset sending resources according to the scheduling request information, the network equipment allocates the same time-frequency resources to terminals with the same communication distance range or the same expected sending power or with a difference smaller than a preset value.

When the scheduled transmission resource is selected autonomously from a shared transmission resource pool of unicast/multicast service and broadcast service configured by a system, the scheduled transmission resource is: the resource with the same transmission power as the resource of the terminal for sending the unicast/multicast service last time, or the resource with the difference value of the transmission power of the resource of the terminal for sending the unicast/multicast service last time smaller than a preset value.

And if the difference value comprises a plurality of difference values, selecting the resource with the minimum difference value as the preset sending resource.

It should be noted that this embodiment is a terminal corresponding to the foregoing method, and all implementation manners in the foregoing method embodiment are applicable to this terminal embodiment, and the same technical effect can be achieved. In the embodiment of the terminal, the terminal may further include a memory 23, where the processor 22 and the memory 23 may both be communicatively connected to the transceiver 21 through a bus interface, the function of the processor 22 may also be implemented by the transceiver 21, and the function of the transceiver 21 may also be implemented by the processor 22.

An embodiment of the present invention further provides a service sending apparatus, including:

the processing module is used for determining the corresponding transmitting power of the preset transmitting resource when the unicast/multicast service is transmitted on the preset transmitting resource;

and the transceiver module is used for transmitting the unicast/multicast service on the preset transmission resource according to the transmission power, wherein the transmission power is less than the maximum transmission power configured by the system.

Wherein the processing module is specifically configured to: determining the transmitting power of a physical direct link control channel (PSCCH) and the transmitting power of a physical direct link shared channel (PSSCH) corresponding to the predetermined transmitting resource;

wherein the transmit power of the PSSCH is indicated by the PSCCH; the sum of the transmission power of the PSCCH and the transmission power of the PSSCH is less than the maximum transmission power configured by the system.

The processing module is specifically configured to: the preset sending resource is selected autonomously from a shared sending resource pool or a dedicated time division resource pool of the unicast/multicast service and the broadcast service configured by the system or selected in a network equipment scheduling mode;

and controlling and processing the transmitting power of a physical straight-through link control channel (PSCCH) and the transmitting power of a physical straight-through link shared channel (PSSCH) corresponding to the preset transmitting resource to obtain the transmitting power for transmitting the unicast/multicast service.

The processing module controls the transmission power of the PSCCH corresponding to the predetermined transmission resource and the transmission power of the PSCCH to obtain the transmission power for transmitting the unicast/multicast service, and is specifically configured to: and reducing the transmission power of the PSCCH and the transmission power of the PSSCH to obtain the transmission power for transmitting the unicast/multicast service, wherein an offset meeting the PSD is formed between the transmission power of the PSCCH and the transmission power of the PSSCH.

The processing module is specifically configured to: selecting the predetermined transmission resource from a dedicated time division transmission resource pool configured for the unicast/multicast service; one time division transmission resource pool is configured with the transmission power of a unicast/multicast service;

determining the transmitting power of a physical straight-through link control channel (PSCCH) and the transmitting power of a physical straight-through link shared channel (PSSCH) corresponding to the preset transmitting resource according to the transmitting power configured by the time division transmitting resource pool; the PSCCH transmission power and the PSSCH transmission power have an offset between them that satisfies the PSD.

The processing module is specifically configured to: the preset sending resource is selected from a shared sending resource pool of the unicast/multicast service and the broadcast service configured by the system;

keeping the transmission power of the physical direct link control channel PSCCH corresponding to the preset transmission resource unchanged and reducing the transmission power of the physical direct link shared channel PSSCH.

The processing module selects the predetermined transmission resource in a network device scheduling manner, and is specifically configured to:

controlling the transceiver module to send resource scheduling request information to a network device, where the resource scheduling request information includes: at least one of an expected transmit power, a quality of service QoS parameter including a communication distance range, and a resource reuse geographical range;

and the transceiver module receives a scheduling signaling sent by the network equipment, and determines the scheduled sending resource configured by the network equipment according to the scheduling request information according to the scheduling signaling.

When the transceiver module sends the resource scheduling request information to the network device, the transceiver module is specifically configured to: and sending the resource scheduling request information to the network equipment through the auxiliary information of the user equipment or the direct link user information or a Media Access Control (MAC) CE.

For unicast service, a communication distance range containing QoS parameters is determined by a high layer, the communication distance range is obtained through information related to basic safety service, and the expected sending power is determined according to correct receiving of a target terminal under a corresponding link;

for multicast services, the communication distance range is the farthest distance between vehicles in the group, and the expected transmission power is determined according to the worst channel quality between links in the group.

And when the network equipment configures the preset sending resources according to the scheduling request information, the network equipment allocates the same time-frequency resources to terminals with the same communication distance range or the same expected sending power or with a difference smaller than a preset value.

When the scheduled transmission resource is selected autonomously from a shared transmission resource pool of unicast/multicast service and broadcast service configured by a system, the scheduled transmission resource is: the resource with the same transmission power as the resource of the terminal for sending the unicast/multicast service last time, or the resource with the difference value of the transmission power of the resource of the terminal for sending the unicast/multicast service last time smaller than a preset value.

And if the difference value comprises a plurality of difference values, selecting the resource with the minimum difference value as the preset sending resource.

An embodiment of the present invention further provides a terminal, including: a processor configured to perform the following functions: when the unicast/multicast service is transmitted on the preset transmitting resource, the transmitting power corresponding to the preset transmitting resource is determined, the unicast/multicast service is transmitted on the preset transmitting resource according to the transmitting power, and the transmitting power is smaller than the maximum transmitting power configured by a system. All the implementation manners in the above method embodiment are applicable to the embodiment of the terminal, and the same technical effect can be achieved.

Embodiments of the present invention also provide a computer storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above.

In the above embodiment of the present invention, when a unicast/multicast service is transmitted on a predetermined transmission resource, the transmission power corresponding to the predetermined transmission resource is determined; and transmitting the unicast/multicast service on the preset transmission resource according to the transmission power, wherein the transmission power is less than the maximum transmission power configured by the system. The unicast and multicast are enabled to associate the service with the resource, and the resource is associated with the sending power, so that the communication distance range requirement of the unicast/multicast can be met through power control.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.

Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims (16)

1. A method for transmitting a service, applied to a transmitting terminal supporting a V2X service, the method comprising:
when a unicast/multicast service is transmitted on a preset transmitting resource, determining the corresponding transmitting power of the preset transmitting resource;
and transmitting the unicast/multicast service on the preset transmission resource according to the transmission power, wherein the transmission power is less than the maximum transmission power configured by the system.
2. The method of claim 1, wherein determining the transmission power corresponding to the predetermined transmission resource comprises:
determining the transmitting power of a physical direct link control channel (PSCCH) and the transmitting power of a physical direct link shared channel (PSSCH) corresponding to the predetermined transmitting resource;
wherein the transmit power of the PSSCH is indicated by the PSCCH; the sum of the transmission power of the PSCCH and the transmission power of the PSSCH is less than the maximum transmission power configured by the system.
3. The method of claim 2, wherein determining the transmission power of the PSCCH and the transmission power of the PSCCH corresponding to the predetermined transmission resource comprises:
the preset sending resource is selected autonomously from a shared sending resource pool or a dedicated time division resource pool of the unicast/multicast service and the broadcast service configured by the system or selected in a network equipment scheduling mode;
and controlling and processing the transmitting power of a physical straight-through link control channel (PSCCH) and the transmitting power of a physical straight-through link shared channel (PSSCH) corresponding to the preset transmitting resource to obtain the transmitting power for transmitting the unicast/multicast service.
4. The method of claim 3, wherein the controlling the transmission power of the PSCCH and the PSSCH corresponding to the predetermined transmission resource to obtain the transmission power for transmitting the unicast/multicast service comprises:
and reducing the transmission power of the PSCCH and the transmission power of the PSSCH to obtain the transmission power for transmitting the unicast/multicast service, wherein an offset meeting the PSD is formed between the transmission power of the PSCCH and the transmission power of the PSSCH.
5. The method of claim 2, wherein determining the transmission power of the PSCCH and the transmission power of the PSCCH corresponding to the predetermined transmission resource comprises:
selecting the predetermined transmission resource from a dedicated time division transmission resource pool configured for the unicast/multicast service; one time division transmission resource pool is configured with the transmission power of a unicast/multicast service;
determining the transmitting power of a physical straight-through link control channel (PSCCH) and the transmitting power of a physical straight-through link shared channel (PSSCH) corresponding to the preset transmitting resource according to the transmitting power configured by the time division transmitting resource pool; the PSCCH transmission power and the PSSCH transmission power have an offset between them that satisfies the PSD.
6. The method of claim 2, wherein determining the transmission power of the PSCCH and the PSCCH corresponding to the predetermined transmission resource comprises:
the preset sending resource is selected from a shared sending resource pool of the unicast/multicast service and the broadcast service configured by the system;
keeping the transmission power of the physical direct link control channel PSCCH corresponding to the preset transmission resource unchanged and reducing the transmission power of the physical direct link shared channel PSSCH.
7. The method according to claim 3, wherein selecting the predetermined transmission resource by means of network device scheduling comprises:
sending resource scheduling request information to a network device, wherein the resource scheduling request information comprises: at least one of an expected transmit power, a quality of service QoS parameter including a communication distance range, and a resource reuse geographical range;
and receiving a scheduling signaling sent by the network equipment, and determining the preset sending resource configured by the network equipment according to the scheduling request information according to the scheduling signaling.
8. The method of claim 7, wherein sending resource scheduling request information to a network device comprises:
and sending the resource scheduling request information to the network equipment through the auxiliary information of the user equipment or the direct link user information or a Media Access Control (MAC) CE.
9. The method of transmitting a service according to claim 8,
for unicast service, a communication distance range containing QoS parameters is determined by a high layer, the communication distance range is obtained through information related to basic safety service, and the expected sending power is determined according to correct receiving of a target terminal under a corresponding link;
for multicast services, the communication distance range is the farthest distance between vehicles in the group, and the expected transmission power is determined according to the worst channel quality between links in the group.
10. The service transmission method according to claim 7, wherein the network device allocates, for the same time-frequency resource, terminals with the same communication distance range or the same expected transmission power or the difference smaller than a preset value to the predetermined transmission resource configured according to the scheduling request information.
11. The method according to claim 3, wherein when the predetermined transmission resource is selected autonomously from a shared transmission resource pool of unicast/multicast service and broadcast service configured by a system, the predetermined transmission resource is: the resource with the same transmission power as the resource of the terminal for sending the unicast/multicast service last time, or the resource with the difference value of the transmission power of the resource of the terminal for sending the unicast/multicast service last time smaller than a preset value.
12. The method of claim 11, wherein if the difference value includes a plurality of difference values, selecting a resource with a smallest difference value as the predetermined transmission resource.
13. A terminal, comprising:
a processor, configured to determine a transmission power corresponding to a predetermined transmission resource when transmitting a unicast/multicast service on the predetermined transmission resource;
and the transceiver is used for transmitting the unicast/multicast service on the preset transmission resource according to the transmission power, wherein the transmission power is less than the maximum transmission power configured by the system.
14. A transmitting apparatus of a service, comprising:
the processing module is used for determining the corresponding transmitting power of the preset transmitting resource when the unicast/multicast service is transmitted on the preset transmitting resource;
and the transceiver module is used for transmitting the unicast/multicast service on the preset transmission resource according to the transmission power, wherein the transmission power is less than the maximum transmission power configured by the system.
15. A terminal, comprising: a processor configured to perform the following functions: when the unicast/multicast service is transmitted on the preset transmitting resource, the transmitting power corresponding to the preset transmitting resource is determined, the unicast/multicast service is transmitted on the preset transmitting resource according to the transmitting power, and the transmitting power is smaller than the maximum transmitting power configured by a system.
16. A computer storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 12.
CN201811224703.7A 2018-10-19 2018-10-19 Service sending method, device and terminal CN111083645A (en)

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