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WO2018054243A1 - Procédés et appareil d'aide à la communication directe entre des dispositifs mobiles - Google Patents

Procédés et appareil d'aide à la communication directe entre des dispositifs mobiles Download PDF

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Publication number
WO2018054243A1
WO2018054243A1 PCT/CN2017/101373 CN2017101373W WO2018054243A1 WO 2018054243 A1 WO2018054243 A1 WO 2018054243A1 CN 2017101373 W CN2017101373 W CN 2017101373W WO 2018054243 A1 WO2018054243 A1 WO 2018054243A1
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Prior art keywords
wireless communication
communication device
sidelink
transmission
time domain
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PCT/CN2017/101373
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English (en)
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Ron Toledano
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JRD Communication Shenzhen Ltd
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JRD Communication Shenzhen Ltd
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Priority to CN201780058226.9A priority Critical patent/CN109845368B/zh
Publication of WO2018054243A1 publication Critical patent/WO2018054243A1/fr
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices

Definitions

  • Embodiments of the present invention generally relate to wireless communication systems and in particular to apparatus and methods for assisting direct communications between mobile wireless communication devices.
  • D2D Direct communication
  • ProSe Proximity Services
  • 3GPP LTE Third Generation Partnership Project, Long Term Evolution
  • Release-12 and Release-13 defines a protocol to describe the manner in which two or more UEs which are in proximity with each other will be able to communicate directly with or without some assistance from the base-station.
  • sidelink is used to refer to direct links between UEs.
  • a direct link between a pair of UEs is facilitated by the so-called 'PC5' interface at each UE.
  • TM1 sidelink transmission modes
  • V2V vehicle to vehicle
  • TM 3 and TM 4 modes sidelink transmission modes
  • Sidelink TM1 is considered as a network-controlled transmission mode where the UE requests sidelink opportunities from the eNB. The eNB can then assign sidelink resources for control and for data transmission based on an eNB specific implementation. Being network-controlled, operating with this transmission mode means that a network can provide dedicated resources for sidelink transmission that are interference free. The disadvantage with this mode however is that it involves signalling overhead and more network co-ordination effort.
  • SC Servicelink Control
  • a SC period is a time window during which D2D communication between devices can occur.
  • the SC period duration and offset is configurable by an eNB and is either broadcast or signalled directly to UEs.
  • a sender UE that may wish to begin a data transmission can then indicate its intention to transmit to a target UE and this intention is allowed to be sent at every SC period, (or when ordered by the eNB in TM1 mode) .
  • a UE which is receiving a transmission on the sidelink monitors the sidelink side (for reception) at every SC period.
  • SA scheduling assignment
  • PRB Physical Resource Blocks
  • each UE can initiate a transmission independently and select independent (e.g. also the same/overlapping) control and data resources.
  • a wearable device (or “remote” device) is a power-limited, low cost device, such as a smart watch for example.
  • a “relay device” is a more capable device which is less power-limited and less sensitive to processing complexity such as a smart phone or home router, for example.
  • these modes are inefficient and not optimised.
  • One reason for the inefficiency is that both devices are assumed to be awake all the time and listening for sidelink communications constantly. This is because the current design supports public safety applications where broadcast transmissions from other devices are to be expected all the time. This is power inefficient in those cases where broadcast transmissions are not constant or where sidelink transmissions are unicast type rather than broadcast.
  • there is no association between two devices so they do not remember each other and no assumptions are made with regard to their transmission and/or reception configurations.
  • a method for assisting direct communications between two or more wireless communication devices via a sidelink in a wireless communication system comprising; configuring at least one of said two or more wireless communication devices with information that indicates a set of SC (Sidelink Control) periods that are allowed for the wireless communication device to initiate data transmissions over the sidelink towards another wireless communication device and that indicates a set of SC (Sidelink Control) periods during which a transmission from another wireless communication device can be expected.
  • SC Servicelink Control
  • Said information may comprise one or more time domain patterns.
  • the wireless communication device may be a UE, a relay device, a smartphone, a smart watch or other wearable, mobile, or remote device.
  • a transmission opportunity window may be defined which indicates allowed sidelink control periods for initiating data transmissions.
  • a reception opportunity window may be defined which indicates sidelink control periods allowed for monitoring.
  • the tx-pattern and rx-pattern may be merged into one time domain pattern.
  • the tx-pattern and rx-pattern may overlap.
  • Some SC periods may not be designated as either transmit periods or monitor periods.
  • a time domain pattern may be represented as an index and a relationship between a plurality of such indices and a pattern of transmit and/or monitor periods (i.e. where transmission is allowed and/or reception can be expected) may be configured in a look up table.
  • the look up table may be configured in or made accessible to each wireless communication device in a group of wireless communication devices.
  • a time domain pattern may be described by a multiplying factor and an offset value.
  • a time domain pattern or its index or other identifying parameter may be associated with a particular wireless communication device or a group of wireless communication devices. That is to say that a time domain pattern or its index or other identifying parameter may be associated with a sidelink destination identity of a particular wireless communication device, or a group of wireless communication devices. This association may be done by a wireless communication device initially informing a base station of one or more sidelink destination IDs with which it wishes to communicate. In return, the base station may acknowledge (or not) and include the destination ID in the configuration information. Alternatively, a time domain pattern or its index may be configured in a wireless communication device without any such association.
  • the transmission opportunities which belong to that pattern are reserved for a possible transmission that is intended for that wireless communication device or group of wireless communication devices that are associated with the pattern.
  • the reception opportunities which belong to that pattern are provided for the detection of transmissions by that wireless communication device or group of wireless communication devices.
  • a transmitting (or receiving) wireless communication device can use transmission (and/or reception) opportunities identified by the pattern without any restriction with regard to the destination/source sidelink identity.
  • a time domain pattern may be transmitted to a wireless communication device by a base station as part of its serving cell configuration.
  • a time domain pattern may be transmitted to a wireless communication device by another wireless communication device.
  • a time domain pattern in a self-configuring mode, may be derived by a wireless communication device from configuration parameters which are broadcast by a base station.
  • a base station may broadcast a parameter with value p.
  • a wireless communication device configured with information that indicates a set of SC (Sidelink Control) periods that are allowed for initiation of data transmissions over a sidelink towards another wireless communication device and that indicates a set of SC (Sidelink Control) periods during which a transmission from another wireless communication device can be expected.
  • SC Servicelink Control
  • Said information may comprise one or more time domain patterns.
  • the wireless communication device may be a UE, a relay device, a smartphone, a smart watch or other wearable, mobile, or remote device.
  • the wireless communication device may include a look up table for storing a time domain pattern.
  • the wireless communication device may also be configured with a control resource index. This may be used for transmission of a Scheduling Assignment (SA) message.
  • SA Scheduling Assignment
  • the control resource index may be associated with a side link identity of a wireless communication device.
  • a wireless communication when receiving, knows which control resource index to look for and when transmitting, knows which control resource index it has to use for transmission towards a destination wireless communication device or group of wireless communication devices.
  • the control resource index may be kept persistent between different transmissions without re-selecting a randomly. Further, the same control resource index may be shared between two or more wireless communication devices. In one arrangement, two or more wireless communication devices may share the same control resource index with non-overlapping transmission opportunity. In another arrangement, two or more wireless communication devices may share the same control resource index with overlapping transmission opportunity, this being achieved by sending each SA message over only a single resource block.
  • control resource index is hopped in a pseudorandom manner with a hopping function known to at least two wireless communication devices which are capable of sidelink communication with one another.
  • the pseudorandom function can be calculated by a wireless communication device in order to derive the actual control resource index to be used before each side link control period intended for data transmission. This measure can mitigate inter-cell interference.
  • the wireless communication device is configured with a priority value whereby if the wireless communication device and another wireless communication device attempt to initiate a sidelink transmission simultaneously, only the wireless communication device with the higher priority is allowed to transmit data.
  • a priority rule defines a behaviour for each device when both devices transmit a Scheduling Assignment message in the same Sidelink Control period.
  • the higher priority device proceeds with its intended data transmission in that SC period and the lower priority device drops its transmission.
  • the higher priority device is also not expected to monitor possible SA transmissions made by a lower priority device (i.e for the SC period when a higher priority device is transmitting) .
  • a base station for transmitting a configuration data to a wireless communication device served by the base station, said configuration data comprising information that indicates a set of SC (Sidelink Control) periods that are allowed for initiation of data transmissions over a sudelink towards another wireless communication device and that indicates a set of SC (Sidelink Control) periods during which a transmission from another wireless communication device can be expected.
  • SC Servicelink Control
  • Said information may comprise one or more time domain patterns.
  • the base station may be an eNB.
  • the invention prevents two UEs initiating a transmission at the beginning of an SC period without considering each other's intentions and provides the following advantages. Collision avoidance between two UEs directly communicating with one another is minimised without having a continuous coordination effort from the network side. This is achieved by having a configuration that can be known to both UE is and a consensus that is known to each UE with regard to when each UE is allowed to transmit data.
  • the invention promotes a lower decoding complexity of the physical control Channel by a receiving UE. This is achievable because the receiving side can be made aware of which control resource index is to be used by a transmitting UE for transmitting a control message.
  • the utilisation of existing side link resources are improved because the network can have a better control on which sidelink resources are being used and at which times.
  • the invention enables a UE to perform sidelink communications even when the resource pool bandwidth is wider than the UE capability. This can be achieved by providing a resource control index advance which avoids the need to monitor control messages when the control channel bandwidth is wider than the UE's bandwidth capability. There is also a greater resilience to inter-cell interference when the same or overlapping resources are assigned for indirect communication in different neighbouring cells. If the control resource index is hopped with different seed in different cells, then the probability of persistent collision along the control channel is reduced. Power efficiency can also be improved.
  • a receiving UE does not have to constantly monitor transmissions from a sender UE during those times in which a transmission is not allowed for that particular sender UE.
  • Figure 1 is a simplified block diagram of a part of a wireless communication system and operating in accordance with an example embodiment.
  • Figure 2 is a simplified flowchart illustrating an example of a method carried out by a UE for transmitting a side link control message
  • Figure 3 is a simplified flowchart illustrating an example of a method of receiving a side link control message carried out at a UE.
  • Figure 4 is a simplified flowchart illustrating an example of a method carried out by a UE for selecting resources for transmission of data.
  • an example of part of an LTE cellular communication system operating in accordance with embodiments of the invention is illustrated and indicated generally at 100 and comprises an evolved Node B (eNB) 101 which supports an LTE cell.
  • eNB evolved Node B
  • the eNBs may be connected to other conventional network components (not shown) .
  • the eNB 101 may communicate with one or more User Equipments (UEs) , three being shown in Figure 1, 102a, 102b, 102c and may configure the UEs with parameters for assisting direct communications with each other over a sidelink 103.
  • UEs User Equipments
  • each UE 102a, 102b, 102c has a look up table 104a, 104b, 104c, respectively which in this is configured by way of configuration data transmitted by the eNB 101.
  • the UEs 102a, 102b, 102c forma set of UEs within a group of UEs which are capable of D2D communication.
  • D2D communications can occur between UEs (102a and 102c over sidelink 103, for example) , during periodic time-windows referred to as SC (Sidelink Control) periods.
  • the period duration is configured by the eNB 101, and in this example is signalled directly to each UE 102a, 102b, 102c.
  • the eNB 101 also configures each UE 102a, 102b, 102c with a time-domain pattern that defines the SC periods that allow a (sender) UE to initiate a data transmission towards target UE.
  • a “transmission opportunity window” is defined and denoted herein as tx-pattern.
  • the eNB 101 also configures each UE 102a, 102b, 102c with a time-domain pattern that defines the SC periods in which a (potential target) UE is expected to monitor a possible data transmission from a sender UE.
  • a “reception opportunity window” is defined and denoted herein as rx-pattern. Monitoring messages by sender UEs, is not required outside this reception opportunity window.
  • the tx-pattern and rx-pattern for a UE overlap so that certain SC periods may be used for either transmission or monitoring and others may be used for neither.
  • the time domain patterns are configured into the look up tables 104a, 104b, 104c of each respective UE 102a, 102b, 102c.
  • Each look up table defines a sequence of “1” sand “0” s. Each entry in the sequence represents a SC period and the sequences are cyclically repeated over a complete cycle of radio frames.
  • a “1” indicates a period which can be used as a transmission and/or reception opportunity and a “0” indicates that no transmission and/or reception opportunity exists.
  • Each pattern is given an index (k) .
  • An example of a look up table is shown in the table below.
  • a (2) (0, 0, 1, 1) is the pattern to follow and the sequence of SC periods allowed for transmission (starting from a zero-based SC period index) will be 2, 3, 6, 7, 10, 11 and so on.
  • the eNB 101 transmits a tx-pattern and rx-pattern to each UE 102a, 102b, 102c.
  • UE 102a desires to send a D2D data transmission to UE 102c.
  • the patterns may be pre-set to default values, e.g. all SC periods may be valid
  • Sender UE102a obtains a control resource index and this can be done, at 202, by the eNB 101 signalling this control resource index in a Radio Resource Control (RRC) message to UE102a.
  • RRC Radio Resource Control
  • An alternative method relies on the UE 102a randomly selecting a control resource index per transmission of a control message.
  • the control resource index is an integer with its value mapped to actual time-frequency physical resource (s) intended to carry a Scheduling Assignment (SA) message.
  • SA Scheduling Assignment
  • the eNB 101 also configures the UE 102a so that the control resource index signalled to the UE 102a remains persistent between different transmissions of SA messages in different SC periods at least as long as UE 102a is connected to or camped onto the same cell (served by eNB101) .
  • This control resource index is referred to herein as ctrl-index-tx.
  • a control resource index is assigned to the UE 102a by another UE or can be implicitly derived based on parameters that are broadcast by the eNB. and/or configured to the UE.
  • the control resource index ctrl-index-tx is hopped in a pseudo-random manner with a hopping function that is known to both UE102a and UE102c by signalling from the eNB 101 or other base station (not shown) . Then only the initialization value and the function have to be known. In this manner, a ctrl-index-tx can be assigned to UE102a in cell A, and the same value can also be assigned to UE102b in cell B.
  • the same physical resources are configured for sending SA messages in both cells A and B, then if both UE102a and UE102b attempt to initiate communication during the same SC periods, the physical resources will not collide with each other often.
  • the assigned ctrl-index-tx can be associated with a sidelink destination identity of another UE, or a set of UEs, or associated with a tx-pattern, or it can also be assigned toa UE without any specific association.
  • a UE may be assigned with multiple ctrl-index-tx
  • UEs can share a same control resource index in a given period. This can be efficient in saving the amount of indices required to support given number of UEs. For example, in a case where both UE102a and UE102c have been configured with a same SC period for a transmission opportunity, they can still share the same assigned control resource index for SA transmission. This is achievable by assigning one of the two physical Resource Blocks, to which a control resource index is mapped, to one UE and the other of the two physical Resource Blocks to the other UE.
  • each UE transmits an SA message over only a single physical RB rather than over both physical RBs,
  • Each UE knows in advance which of the two physical RBs associated with the assigned control resource index, is allocated to it (and to the other UE) .
  • the UE 102a waits for the next SC period which belongs to its configured tx-pattern. During this period (i.e. a transmission opportunity window) , at 203, where initiation of a transmission is allowed, UE102a transmits a control message (i.e the SA message in this example) which is intended for UE102c.
  • the SA message indicates UE102a's intention to transmit (to UE 102c) .
  • the SA message typically includes transmission-related parameters such as data allocation, MCS (Modulation and Coding Scheme) , frequency hopping, etc.
  • a priority value can depend on UE type. For example, a UE which declares itself as a remote UE will automatically be deemed to have a higher priority. A UE which declares itself as a relay UE will automatically be deemed to have a lower-priority.
  • a priority value can, alternatively, be provided with upper-layer signalling and in this case is configured specifically to the UE.
  • the UE having the earlier occurring time index of the two is deemed to have the higher priority. So if a transmission by a higher priority sender has been detected, then at 205, the transmission is dropped. If not, then at 206, the UE proceeds with transmission of data. In this way the UE with the lower-priority will have enough time to decode this SA message and drop its data transmission before its first opportunity for data transmission becomes available.
  • the UE with the higher priority is not expected to monitor a possible SA message from the lower-priority UE, as it will receive priority in any case, (this being true when the higher priority device transmits) . However, it may still monitor the lower-priority SA message based on a specific implementation. In a case where the UE is assumed to be a high priority UE, the transmission of data can go ahead and step 204 can be skipped.
  • the eNB 101 transmits a tx-pattern and rx-pattern to each UE 102a, 102b, 102c.
  • UE 102a is the sender (and operates as described above with reference to Figure 1) and UE 102c is the target.
  • the target UE 102c is made aware of the control resource index that has been assigned to the sender UE 102a.
  • this control resource index (referred to herebelow as cntrl-index-rx) is directly mapped to physical resources, this means that the target UE 102c can monitor the physical resources that possibly carry an SA message by the sender UE 102a rather than exhaustively monitoring all possible physical resources.
  • cntrl-index-rx has a value '0' .
  • target UE 102c detects the SA message from UE 102a which is associated with the identity of UE 102c and then receives and decodes the following transmitted data sent by the sender UE 102a.
  • cntrl-index-rx can be associated with a sender identity of another UE or a group of sender UEs. It may also be associated with the rx-pattern or can be assigned to a UE without any specific association. A UE may be assigned with a multiple number of cntrl-index-rx.
  • the lower priority UE is configured to monitor the first resource block instance mapped by the control resource index.
  • the higher priority UE is not expected to monitor the other resource block mapped by this index. If a UE is not assigned with any priority, it is configured to monitor the other resource block mapped by this index as is conventional.
  • UE 101a which is a relay, say, may wish to communicate with more than one target UE, say UE 102b and 102c, which are both remote devices, say, in the same SC period.
  • UE102a sends two separate SA messages intended for UE102b and UE102c to indicate this intention.
  • the invention also, optionally, provides a method by which a wireless communication device may select resources for data transmission. Such a method is applicable to the aforementioned case where a relay UE may want to communicate with two or more separate remote UEs in the same SC period.
  • an eNB provides a time-domain pattern and a control resource index to the UE. However, it is left to the UE to select (at random) frequency resources and subframes which comprise an SC period that is part of the provided time domain pattern to be used for data transmissions.
  • a relay UE randomly selects a first "Time Resource Pattern” (TRP) i.e a pattern of subframes to be used for data transmission towards a first remote UE in a random manner out of all Time Resource Patterns available.
  • TRP Time Resource Pattern
  • the UE selects a contiguous set of frequency resources to be used towards the first remote UE in the subframes defined by the TRP selected.
  • the relay UE randomly selects a second TRP out of those TRP patterns available that are orthogonal to any TRP already selected. The process then reverts to 402. When no transmission is needed for any additional remote UE, then at 405 the data is transmitted using the resources selected.
  • the signal processing functionality of the embodiments of the invention may be achieved using computing systems or architectures known to those who are skilled in the relevant art.
  • Computing systems such as, a desktop, laptop or notebook computer, hand-held computing device (PDA, cell phone, palmtop, etc. ) , mainframe, server, client, or any other type of special or general purpose computing device as may be desirable or appropriate for a given application or environment can be used.
  • the computing system can include one or more processors which can be implemented using a general or special-purpose processing engine such as, for example, a microprocessor, microcontroller or other control module.
  • the computing system can also include a main memory, such as random access memory (RAM) or other dynamic memory, for storing information and instructions to be executed by a processor. Such a main memory also may be used for storing temporary variables or other intermediate information during execution of instructions to be executed by the processor.
  • the computing system may likewise include a read only memory (ROM) or other static storage device for storing static information and instructions for a processor.
  • ROM read only memory
  • the computing system may also include an information storage system which may include, for example, a media drive and a removable storage interface.
  • the media drive may include a drive or other mechanism to support fixed or removable storage media, such as a hard disk drive, a floppy disk drive, a magnetic tape drive, an optical disk drive, a compact disc (CD) or digital video drive (DVD) read or write drive (R or RW) , or other removable or fixed media drive.
  • Storage media may include, for example, a hard disk, floppy disk, magnetic tape, optical disk, CD or DVD, or other fixed or removable medium that is read by and written to by media drive.
  • the storage media may include a computer-readable storage medium having particular computer software or data stored therein.
  • an information storage system may include other similar components for allowing computer programs or other instructions or data to be loaded into the computing system.
  • Such components may include, for example, a removable storage unit and an interface , such as a program cartridge and cartridge interface, a removable memory (for example, a flash memory or other removable memory module) and memory slot, and other removable storage units and interfaces that allow software and data to be transferred from the removable storage unit to computing system.
  • the computing system can also include a communications interface.
  • a communications interface can be used to allow software and data to be transferred between a computing system and external devices.
  • Examples of communications interfaces can include a modem, a network interface (such as an Ethernet or other NIC card) , a communications port (such as for example, a universal serial bus (USB) port) , a PCMCIA slot and card, etc.
  • Software and data transferred via a communications interface are in the form of signals which can be electronic, electromagnetic, and optical or other signals capable of being received by a communications interface medium.
  • computer program product may be used generally to refer to tangible media such as, for example, a memory, storage device, or storage unit.
  • These and other forms of computer-readable media may store one or more instructions for use by the processor comprising the computer system to cause the processor to perform specified operations.
  • Such instructions generally referred to as ‘computer program code’ (which may be grouped in the form of computer programs or other groupings) , when executed, enable the computing system to perform functions of embodiments of the present invention.
  • the code may directly cause a processor to perform specified operations, be compiled to do so, and/or be combined with other software, hardware, and/or firmware elements (e.g., libraries for performing standard functions) to do so.
  • the software may be stored in a computer-readable medium and loaded into computing system using, for example, removable storage drive.
  • a control module in this example, software instructions or executable computer program code
  • the processor in the computer system when executed by the processor in the computer system, causes a processor to perform the functions of the invention as described herein.
  • inventive concept can be applied to any circuit for performing signal processing functionality within a network element. It is further envisaged that, for example, a semiconductor manufacturer may employ the inventive concept in a design of a stand-alone device, such as a microcontroller of a digital signal processor (DSP) , or application-specific integrated circuit (ASIC) and/or any other sub-system element.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • aspects of the invention may be implemented in any suitable form including hardware, software, firmware or any combination of these.
  • the invention may optionally be implemented, at least partly, as computer software running on one or more data processors and/or digital signal processors or configurable module components such as FPGA devices.
  • the elements and components of an embodiment of the invention may be physically, functionally and logically implemented in any suitable way. Indeed, the functionality may be implemented in a single unit, in a plurality of units or as part of other functional units.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Selon l'invention, dans un système de communications cellulaires LTE (100) prenant en charge une communication directe entre des dispositifs mobiles (102a, 102b, 102c), un eNB (101) transmet des données de configuration à des dispositifs mobiles, les données de configuration comprenant un motif de domaine temporel qui indique un ensemble de périodes de commande de liaison latérale qui sont accordées à un dispositif mobile pour initier des transmissions de données sur une liaison latérale vers un autre dispositif mobile, et un ensemble de périodes de commande de liaison latérale dans lesquelles une transmission depuis un autre dispositif mobile peut être attendue. Le fait qu'une configuration soit connue des deux dispositifs mobiles et qu'un consensus existe quant au moment où chaque dispositif est autorisé à transmettre des données, il est possible de minimiser un évitement de collision entre deux dispositifs communiquant directement l'un avec l'autre sans exiger un effort de coordination continu de la part du réseau.
PCT/CN2017/101373 2016-09-23 2017-09-12 Procédés et appareil d'aide à la communication directe entre des dispositifs mobiles Ceased WO2018054243A1 (fr)

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CN112823561A (zh) * 2018-11-01 2021-05-18 苹果公司 用于nr v2x侧行链路通信的qos感知拥塞控制、资源分配和设备内共存解决方案

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