WO2014075299A1 - Procédé d'allocation de ressource, station de base et dispositif d2d - Google Patents

Procédé d'allocation de ressource, station de base et dispositif d2d Download PDF

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Publication number
WO2014075299A1
WO2014075299A1 PCT/CN2012/084765 CN2012084765W WO2014075299A1 WO 2014075299 A1 WO2014075299 A1 WO 2014075299A1 CN 2012084765 W CN2012084765 W CN 2012084765W WO 2014075299 A1 WO2014075299 A1 WO 2014075299A1
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WO
WIPO (PCT)
Prior art keywords
allocated
resources
prach
public
resource
Prior art date
Application number
PCT/CN2012/084765
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English (en)
Chinese (zh)
Inventor
吴作敏
马洁
程型清
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华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2012/084765 priority Critical patent/WO2014075299A1/fr
Priority to CN201280076731.3A priority patent/CN104770029B/zh
Publication of WO2014075299A1 publication Critical patent/WO2014075299A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • the present invention relates to the field of communications, and in particular, to a resource allocation method, a base station, and a D2D device.
  • a device to device refers to communication between a device and a device, for example, MP3 transmission or picture sharing.
  • the D2D communication method in the prior art includes directly sharing information through a method such as Bluetooth or a wireless network.
  • the D2D function is mainly to discover other devices with D2D functions, such as User Equipment (UE).
  • UE User Equipment
  • resources of the existing network need to be utilized. Therefore, the network needs to have a part of resources allocated to users with D2D functions for device discovery and communication.
  • the embodiments of the present invention provide a resource allocation method, a base station, and a D2D device, to solve the problem of lack of flexibility in allocating resources for a D2D device in the related art.
  • a resource allocation method including: receiving a PRACH request sent by at least one D2D device; and allocating a common resource for a D2D device according to the PRACH request.
  • the PRACH request includes a PRACH sequence, and before the public resource dedicated to the D2D device is allocated according to the PRACH request, determining that the PRACH sequence belongs to the first predetermined set, where the first predetermined set is A collection of sequences dedicated to the use of D2D devices.
  • the common resource is used by the D2D device to detect and/or listen to information transmitted by other D2D devices on the common resource.
  • the allocating the common resource for the D2D device according to the PRACH request includes: allocating the D2D device when the preset condition is met The public resource; the preset condition includes at least one of the following: the PRACH request is a PRACH request received from the D2D device for the first time; no public resource is available when the PRACH request is received; The public resource has not been allocated before the PRACH request; when the PRACH request is received, the last allocated public resource has been released.
  • the public resource allocated for the D2D device according to the PRACH request includes: according to the last allocation The usage of the common resource and the number of D2D devices corresponding to the PRACH request, reallocating the common resources for the D2D device; or, according to the size of the last allocated common resource, the number of currently accessed D2D devices, and the PRACH The number of D2D devices corresponding to the request is redistributed, and the common resources for the D2D device are reallocated.
  • the foregoing method further includes: notifying the D2D device of the information of the allocated common resource.
  • the D2D device notifies the allocated common resource that: the D2D device in the active state is notified of the information of the allocated common resource by using the control signaling; and/or, the information of the allocated common resource is notified to the D2D device in the idle state through the common signaling.
  • the information about the allocated common resource includes the time-frequency resource location information of the allocated common resource, the effective time of the allocated common resource, and At least one of the cycles of the allocated common resources.
  • the PRACH request includes a PRACH sequence
  • the foregoing method further includes: according to the correspondence between the PRACH sequence and the dedicated resource, in the public resource
  • Each D2D device in at least one D2D device allocates a dedicated resource for transmitting information on the dedicated resource by the D2D device.
  • the mapping between the PRACH sequence and the dedicated resource, and allocating dedicated resources for each D2D device in the at least one D2D device in the common resource includes:
  • S is the index of the allocated dedicated resource
  • M is the PRACH sequence
  • N is the total number of resources in the common resource
  • mod is the modulo operation
  • SI is an index of the starting position of the allocated dedicated resource
  • M is the sum of the PRACH sequence
  • N is the total number of resources in the common resource
  • mod is the modulo operation
  • the method further includes: sending a random access response message to each D2D device in the at least one D2D device, to facilitate indication The dedicated resource corresponding to at least one D2D device is successfully allocated.
  • the foregoing method further includes:
  • a second aspect provides a resource allocation method, including: a PRACH request sent by a D2D device to a base station, so that the base station allocates a common resource for the D2D device according to the PRACH request; and the D2D device receives the allocated public sent by the base station. Resource information.
  • the PRACH request includes a PRACH sequence.
  • the method further includes: the D2D device selecting the PRACH sequence from the first predetermined set.
  • the first predetermined set is a set of sequences dedicated to the use of the D2D device.
  • the public resource is used by the D2D device to detect and/or listen to information sent by other D2D devices on the common resource.
  • the common resource is allocated by the base station when the preset condition is met;
  • the preset condition includes at least one of the following: the PRACH request is the a PRACH request from a D2D device received by the base station for the first time; no public resource available when the base station receives the PRACH request; no public resource has been allocated before the base station receives the PRACH request; when the base station receives the PRACH request, The public resource allocated once is released.
  • the public resource allocated by the base station according to the PRACH request is:
  • the public resources for the D2D device are reallocated according to the size of the last allocated common resource, the number of currently accessed D2D devices, and the number of D2D devices corresponding to the PRACH request.
  • the information that the D2D device receives the allocated common resource sent by the base station includes: the D2D device receives the control sent by the base station Signaling, where the control signaling includes information of the allocated common resource; and/or, the D2D device receives the common signaling sent by the base station, where the common signaling includes information of the allocated common resource.
  • the information about the allocated common resource includes the time-frequency resource location information of the allocated common resource, the effective time of the allocated common resource, and At least one of the cycles of the allocated common resources.
  • the PRACH request includes a PRACH sequence
  • the PRACH sequence has a correspondence relationship with the dedicated resource allocated for the D2D device, and the dedicated resource is used.
  • the information is sent by the D2D device on a dedicated resource.
  • the foregoing corresponding relationship includes:
  • S is the index of the allocated dedicated resource
  • M is the index of the PRACH sequence
  • N is the total number of resources in the common resource
  • mod is the modulo operation
  • S1 is the index of the starting position of the allocated dedicated resource
  • M is the PRACH sequence
  • N is the total number of resources in the public resource
  • mod is the modulo operation
  • the foregoing method further includes:
  • the D2D device receives the random access response message sent by the base station, where the random access response message is used to indicate that the dedicated resource corresponding to the D2D device is successfully allocated.
  • a base station including: a receiving unit, configured to receive a physical random access channel PRACH request sent by the at least one device to the device D2D device; and an allocating unit, connected to the receiving unit, configured to allocate according to the PRACH request Common resources for D2D devices.
  • the PRACH request includes a PRACH sequence
  • the base station further includes: a determining unit, connected to the receiving unit and the allocating unit, configured to allocate the dedicated device to the D2D device according to the PRACH request at the allocating unit Before the public resource, determining that the PRACH sequence belongs to the first predetermined set, the first predetermined set Is a collection of sequences dedicated to the use of D2D devices.
  • the common resource is used by the D2D device to detect and/or listen to information sent by other D2D devices on the common resource.
  • the allocating unit is configured to allocate a common resource for the D2D device when the preset condition is met; the preset condition includes the following At least one of the following: the PRACH request is the first received PRACH request from the D2D device; the public resource is not available when the PRACH request is received; the public resource has not been allocated before the PRACH request is received; when the PRACH request is received, The public resource allocated once is released.
  • the allocating unit is configured to use, according to the last allocated public resource usage, and the PRACH, if the public resource is currently allocated.
  • the number of D2D devices corresponding to the request reallocating the common resources for the D2D device; or, according to the size of the last allocated common resource, the number of currently accessed D2D devices, and the number of D2D devices corresponding to the PRACH request , reallocate common resources for D2D devices.
  • the base station further includes: a sending unit, connected to the allocating unit, configured to notify the D2D device of the information about the allocated common resource. .
  • the sending unit is configured to notify the D2D device in the active state of the information of the allocated common resource by using control signaling; and/or, The D2D device in the idle state is notified of the information of the allocated common resource by public signaling.
  • the information about the allocated common resource includes the time-frequency resource location information of the allocated common resource, the effective time of the allocated common resource, and At least one of the cycles of the allocated common resources.
  • the PRACH request includes a PRACH sequence
  • the allocation unit is further configured to: in the public resource, according to the correspondence between the PRACH sequence and the dedicated resource
  • Each D2D device in at least one D2D device allocates a dedicated resource for transmitting information on the dedicated resource by the D2D device.
  • the allocation unit is configured to:
  • S is the index of the allocated dedicated resource
  • M is the cable of the PRACH sequence
  • N is the resource of the public resource
  • mod represents the modulo operation
  • S1 is the index of the starting position of the allocated dedicated resource
  • M is the PRACH sequence
  • N is the total number of resources in the public resource
  • mod is the modulo operation
  • the base station further includes: a sending unit, connected to the allocating unit, configured to send to each of the at least one D2D device And sending a random access response message, so as to indicate that the dedicated resource allocation corresponding to the at least one D2D device is successfully.
  • the base station further includes: a detecting unit, connected to the allocating unit, configured to detect whether the common resource is used; And connecting to the detecting unit, for releasing the allocated common resource if the detecting unit detects that the common resource is not used within the first predetermined time period.
  • a D2D device including: a sending unit, a physical random access channel PRACH request sent to a base station, so that the base station allocates a common resource for the D2D device according to the PRACH request; Information for receiving the allocated common resource sent by the base station.
  • the PRACH request includes a PRACH sequence
  • the D2D device further includes: a selecting unit, connected to the sending unit, before the PRACH request sent by the sending unit to the base station, A PRACH sequence is selected from a predetermined set, the first predetermined set being a set of sequences dedicated to use by the D2D device.
  • the common resource is used by the D2D device to detect and/or listen to information sent by other D2D devices on the common resource.
  • the common resource is allocated by the base station when the preset condition is met;
  • the preset condition includes at least one of the following: the PRACH request is the a PRACH request from a D2D device received by the base station for the first time; no public resource available when the base station receives the PRACH request; no public resource has been allocated before the base station receives the PRACH request; when the base station receives the PRACH request, The public resource allocated once is released.
  • the common resource allocated by the base station according to the PRACH request is: a public resource for the D2D device re-allocated according to the usage of the last allocated common resource and the number of D2D devices corresponding to the PRACH request; Or, the public resources for the D2D device are reallocated according to the size of the last allocated common resource, the number of currently accessed D2D devices, and the number of D2D devices corresponding to the PRACH request.
  • the receiving unit is configured to receive control signaling sent by the base station, where the control signaling includes information about the allocated common resource. And/or, the receiving unit is configured to receive the common signaling sent by the base station, where the public signaling includes the information of the allocated common resource.
  • the information about the allocated common resource includes the time-frequency resource location information of the allocated common resource, the effective time of the allocated common resource, and At least one of the cycles of the allocated common resources.
  • the PRACH request includes a PRACH sequence
  • the PRACH sequence has a correspondence relationship with the dedicated resource allocated for the D2D device, and the dedicated resource is used.
  • the information is sent by the D2D device on a dedicated resource.
  • the foregoing corresponding relationship includes:
  • S is the index of the allocated dedicated resource
  • M is the index of the PRACH sequence
  • N is the total number of resources in the common resource
  • mod is the modulo operation
  • S1 is the index of the starting position of the allocated dedicated resource
  • M is the PRACH sequence
  • N is the total number of resources in the public resource
  • mod is the modulo operation
  • the receiving unit is configured to receive a random access response message sent by the base station, where the random access response message is used to indicate the The dedicated resource corresponding to the D2D device is successfully assigned.
  • a base station including: a transceiver, configured to send and receive signals; and a processor, configured to: pass The transceiver receives a physical random access channel PRACH request sent by the at least one device to the device D2D device; and allocates a common resource for the D2D device according to the PRACH request.
  • the PRACH request includes a PRACH sequence
  • the processor is configured to: determine that the PRACH sequence belongs to the first predetermined set, before allocating the common resource dedicated to the D2D device according to the PRACH request, the first The predetermined set is a collection of sequences dedicated to the use of the D2D device.
  • the common resource is used by the D2D device to detect and/or listen to information sent by other D2D devices on the common resource.
  • the processor by using the following manner, allocates a common resource for the D2D device according to the PRACH request: when a preset condition is met, Allocating a common resource for the D2D device; the preset condition includes at least one of the following: the PRACH request is the first received PRACH request from the D2D device; the public resource is not available when the PRACH request is received; the PRACH request is received The public resource has not been allocated before; when the PRACH request is received, the last allocated public resource has been released.
  • the processor implements, according to the PRACH request, allocating the common resource for the D2D device. Re-allocating the common resources for the D2D device according to the usage of the last allocated common resource and the number of D2D devices corresponding to the PRACH request; or, according to the size of the last allocated common resource, the currently accessed D2D The number of devices and the number of D2D devices corresponding to the PRACH request are redistributed for the common resources of the D2D device.
  • the processor is configured to: notify, by the transceiver, information about the allocated common resource to the D2D device.
  • the processor is configured to notify the D2D device of the allocated common resource by: controlling the signaling to the active state D2D device Notifying the information of the allocated common resource; and/or notifying the D2D device in the idle state of the information of the allocated common resource by public signaling.
  • the information about the allocated common resource includes the time-frequency resource location information of the allocated common resource, the effective time of the allocated common resource, and At least one of the cycles of the allocated common resources.
  • the PRACH request includes a PRACH sequence
  • the processor is configured to: according to the correspondence between the PRACH sequence and the dedicated resource, in the public Within the resource, each D2D device in the at least one D2D device is allocated a dedicated resource for transmitting information on the dedicated resource by the D2D device.
  • the processor implements, according to the correspondence between the PRACH sequence and the dedicated resource, in the at least one D2D device in the common resource. Assign dedicated resources to each D2D device:
  • S is the index of the allocated dedicated resource
  • M is the index of the PRACH sequence
  • N is the total number of resources in the common resource
  • mod is the modulo operation
  • S1 is the index of the starting position of the allocated dedicated resource
  • M is the PRACH sequence
  • N is the total number of resources in the public resource
  • mod is the modulo operation
  • the processor is configured to: send, by using a transceiver, a random access response message to each D2D device in the at least one D2D device, so that And indicating that the dedicated resource corresponding to the at least one D2D device is successfully allocated.
  • the processor is further configured to: when the public resource is detected to be unused in the first predetermined time period, release Public resources allocated.
  • the sixth aspect provides a D2D device, including: a transceiver, configured to send and receive a signal; and a processor, configured to:: a physical random access channel PRACH request sent by the transceiver to the base station, so that the base station according to the PRACH request, Allocating a common resource for the D2D device; receiving, by the transceiver, information of the allocated common resource sent by the base station.
  • the PRACH request includes a PRACH sequence
  • the processor is configured to: select, before the PR2 request sent by the D2D device to the base station, the PRACH sequence from the first predetermined set, the first predetermined A collection is a collection of sequences that are dedicated to the use of D2D devices.
  • public funds The source is used by the D2D device to detect and/or listen to information sent by other D2D devices on common resources.
  • the common resource is allocated by the base station when the preset condition is met;
  • the preset condition includes at least one of the following: the PRACH request is the a PRACH request from a D2D device received by the base station for the first time; no public resource available when the base station receives the PRACH request; no public resource has been allocated before the base station receives the PRACH request;
  • the common resource allocated by the base station according to the PRACH request is: according to the last allocated public resource. Usage and the number of D2D devices corresponding to the PRACH request, the re-allocated common resources for the D2D device; or, according to the size of the last allocated common resource, the number of currently accessed D2D devices and
  • the number of D2D devices corresponding to the PRACH request, and the re-allocated common resources for the D2D device are the number of D2D devices corresponding to the PRACH request, and the re-allocated common resources for the D2D device.
  • the processor is configured to: receive, by using a transceiver, information about the allocated common resource sent by the base station by using a transceiver, where: Receiving control signaling sent by the base station, where the control signaling includes information of the allocated common resource; and/or receiving, by the transceiver, common signaling sent by the base station, where the public signaling includes the allocated common resource Information.
  • the information about the allocated common resource includes the time-frequency resource location information of the allocated common resource, the effective time of the allocated common resource, and At least one of the cycles of the allocated common resources.
  • the PRACH request includes a PRACH sequence
  • the PRACH sequence has a correspondence relationship with the dedicated resource allocated for the D2D device, and the dedicated resource is used.
  • the information is sent by the D2D device on a dedicated resource.
  • the foregoing corresponding relationship includes:
  • S is the index of the allocated dedicated resource
  • M is the index of the PRACH sequence
  • N is the total number of resources in the common resource
  • mod is the modulo operation
  • SI is the index of the starting position of the allocated dedicated resource
  • M is the PRACH sequence
  • N is the total number of resources in the public resource
  • mod is the modulo operation
  • the processor is configured to: receive, by using a receiver, a random access response message sent by the base station, where the random access response message is used by Indicates that the dedicated resource corresponding to the D2D device is successfully allocated.
  • the base station after receiving the physical random access channel (PRACH) sequence sent by the at least one D2D device, the base station allocates a common resource for the D2D device according to the PRACH sequence, thereby enabling the public resource to be used for the D2D device.
  • PRACH physical random access channel
  • FIG. 2 is a flow chart of another resource allocation method according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of still another resource allocation method according to an embodiment of the present invention.
  • FIG. 4 is a structural block diagram of a base station according to an embodiment of the present invention.
  • FIG. 5 is a block diagram showing a preferred structure of a base station according to an embodiment of the present invention.
  • FIG. 6 is a structural block diagram of a D2D device according to an embodiment of the present invention.
  • FIG. 7 is a block diagram showing a preferred structure of a D2D device according to an embodiment of the present invention.
  • FIG. 8 is a structural block diagram of another base station according to an embodiment of the present invention.
  • FIG. 9 is a block diagram showing the structure of another D2D device according to an embodiment of the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of them. Example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention. The features of the embodiments of the present invention and the embodiments may be combined with each other without conflict.
  • the D2D device may be a mobile terminal (Mobile Terminal, MT for short), a mobile user device, etc., and may communicate with one or more core networks via a Radio Access Network (RAN), and the D2D device may be a mobile device.
  • a terminal such as a mobile phone (or "cellular" phone) or a computer with a mobile terminal, can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device.
  • the base station which may be a Base Transceiver Station (BTS) in GSM or CDMA, may be a base station (NodeB) in WCDMA, or may be an Evolved Node B (eNB) in LTE.
  • BTS Base Transceiver Station
  • NodeB base station
  • eNB Evolved Node B
  • the embodiment of the invention provides a resource allocation method, and the execution body of the method may be a base station. As shown in Figure 1, the method includes:
  • Step 101 Receive a PRACH request sent by at least one D2D device.
  • Step 102 Allocate a common resource for the D2D device according to the PRACH request.
  • the base station allocates common resources to the D2D device according to the PRACH request sent by the at least one D2D device, and implements flexible allocation of common resources for the D2D device, thereby improving system efficiency.
  • the foregoing PRACH request includes a PRACH sequence; after determining that the received PRACH sequence belongs to the first predetermined set, the base station allocates a common resource dedicated to the D2D device according to the PRACH sequence, where the first predetermined set is dedicated to the D2D device.
  • the embodiment of the invention provides a resource allocation method, and the execution body of the method may be a D2D device. As shown in Figure 2, the method includes:
  • Step 201 A PRACH request sent by the D2D device to the base station, so that the base station allocates a common resource for the D2D device according to the PRACH request.
  • Step 202 Receive information about the allocated common resource sent by the base station.
  • the base station allocates common resources to the D2D device according to the PRACH request sent by the at least one D2D device, and implements flexible allocation of common resources for the D2D device, thereby improving system efficiency.
  • the foregoing PRACH request includes a PRACH sequence
  • the D2D device selects, from the first predetermined set, a PRACH sequence to be transmitted, the first predetermined set being a set dedicated to the sequence used by the D2D device.
  • the embodiment of the invention provides a resource allocation method. As shown in FIG. 3, the method includes:
  • Step 301 The base station receives a PRACH request sent by at least one D2D device.
  • Step 302 According to the PRACH request, the base station allocates a common resource for the D2D device.
  • the base station allocates common resources to the D2D device according to the PRACH request sent by the at least one D2D device, and implements flexible allocation of common resources for the D2D device, thereby improving system efficiency.
  • the foregoing PRACH request includes a PRACH sequence; before the base station receives the PRACH request sent by the at least one D2D device, the at least one D2D device selects a PRACH sequence from the first predetermined set, and then the base station determines that the received PRACH sequence belongs to After the first predetermined set, a common resource dedicated to the D2D device is allocated according to the PRACH sequence, wherein the first predetermined set is a set of sequences dedicated to use by the D2D device.
  • the embodiment provides a method for determining that a PRACH sequence is from a D2D device, by which the base station can determine that the received PRACH sequence is a sequence from a D2D device, thereby triggering resource allocation. It should be noted that the method of determining that the PRACH sequence is from the D2D device may also include other methods, for example, using an indicator to indicate that the received PRACH sequence is from the D2D device.
  • the D2D device can select a specific PRACH sequence when using the D2D function, and the gp is dedicated to the sequence in the set of sequences used by the D2D device, thereby avoiding the allocation of resources by the D2D device that does not use the D2D function, thereby avoiding Waste of resources.
  • the PRACH sequence of the base station of the LTE network may be reserved for a part of the D2D device access.
  • the number of PRACH sequences supported by the existing LTE base station is 64.
  • the PRACH sequence supported by the base station can be extended to (64+P), and the P2 PRACH sequence is used by the D2D device by default.
  • I the P PRACH sequences are PRACH sequences reserved by the base station to the D2D device.
  • the P PRACH sequences are generated in a manner consistent with the manner in which the first 64 PRACH sequences in the existing LTE system are generated.
  • the number of PRACH sequences available to each cell is 64.
  • the base station broadcasts the logical root sequence index RACH_ROOT_SEQUENCE through the system information, and notifies the cyclic shift interval by higher layer signaling.
  • ( zeroCorrelationZoneConfig ) parameter ie Ncs).
  • the UE continues to use the next logical root sequence. Index, find the corresponding physical root sequence, repeat the above process until 64 PRACH sequences are generated.
  • the sequence numbers of these PRACH sequences are 0 to 63.
  • the logical root sequence index is continuous from 0 to 837.
  • the base station finds a corresponding physical root sequence u according to the logical root sequence I RACH_ROOT_SEQUENCE, according to the formula 0 ⁇ n ⁇ N ze - l generates a PRACH root sequence, and then cyclically shifts the PRACH root sequence according to the Ncs value to obtain different PRACH sequences. If a root sequence cannot generate 64 PRACH sequences according to the received Ncs value, the UE continues to use the next logical root sequence to find its corresponding physical root sequence, and repeats the above process until 64+P PRACHs are generated. Up to the sequence, the sequence numbers of these PRACH sequences are 0 to 63+P. Logical root sequence indexes are consecutive from 0 to 837. The last P PRACH sequences are PRACH sequences reserved by the base station for the D2D device.
  • P PRACH sequence is a PRACH sequence reserved by the base station for the D2D device.
  • the P-PRACH sequence is used for random access.
  • the normal UE also generates 64 PRACH sequences according to the method of the existing LTE system described above, and the 64 PRACH sequences are not PRACH sequences reserved by the base station for the D2D device.
  • the P value can also be determined according to the size of the network to be arranged. For example, P can be 64 or 128. At this time, the P value can be notified by the system information broadcast.
  • the method for requesting access to the LTE network by the D2D device may be the same as the method for requesting access by the LTE UE, since both the normal UE and the D2D device use the PRACH sequence for access. If no D2D device requests access, the time-frequency resource may not be reserved for the D2D user.
  • the common resource in the embodiment of the present invention is used by the D2D device to detect and/or listen to information sent by other D2D devices on the common resource.
  • step 302 can be implemented by: when the preset condition is met, the base station allocates a common resource for the D2D device; the preset condition includes at least one of the following: the PRACH request is the first received from the D2D device. PRACH request; no public resources available when receiving the PRACH request; no public resources have been allocated before receiving the PRACH request; when the PRACH request is received, the last allocated public resource has been released.
  • the common resource may be a common time-frequency resource.
  • the public time-frequency resource may be a time-frequency resource that is requested by the LTE network to be allocated to the D2D device during initial access.
  • the D2D device can detect or listen to the information sent by other D2D devices on the common resource.
  • the base station is configured to allocate initial public resources for the D2D.
  • the base station allocates a common resource for the D2D device, thereby avoiding allocating resources for the D2D device when there is no D2D device, thereby improving the efficiency of the system.
  • step 302 can also be implemented in one of the following ways: Method 1: According to the usage of the last allocated common resource and the number of D2D devices corresponding to the PRACH request, the base station reallocates a common resource of the D2D device; for example, if it is determined that the last allocated common resource has been used by the D2D device, and another new D2D device requests access, the common resource for the D2D device is added; If the unused resources in the allocated common resources are insufficient to satisfy the D2D device corresponding to the PRACH request, the common resources for the D2D device are added; if the base station determines that the usage rate of the last allocated common resource is low, and the received The number of D2D devices corresponding to the PRACH request is small, and the common resources for the D2D device are reduced.
  • Method 1 According to the usage of the last allocated common resource and the number of D2D devices corresponding to the PRACH request, the base station reallocates a common resource of the D2D device; for example, if it is determined
  • the base station After the D2D device accesses successfully, the base station allocates dedicated resources from the public resources to the D2D device. If the base station finds that the dedicated resource allocated to a certain D2D device is not used within a predetermined time, the resource is released. Therefore, the base station can obtain the usage of the common resource by means of monitoring.
  • Method 2 according to the size of the last allocated public resource, the number of currently accessed D2D devices, and the
  • the number of D2D devices corresponding to the PRACH request and the base station reallocates the common resources for the D2D device. For example, if the base station determines that the currently accessed D2D device and the D2D device corresponding to the PRACH request require more resources than the last allocated common resource, the common resource for the D2D device may be increased; Common resources for D2D devices.
  • the number of D2D devices corresponding to the PRACH request by the base station and the last time can flexibly allocate common resources to the D2D devices to meet the needs of the currently required D2D devices. Thus, even if there are many D2D devices, each D2D device can obtain corresponding resources.
  • the base station may further dynamically adjust the size of the common resource according to the number of received PRACH sequences, and then the base station may notify the D2D device of the adjusted common resource.
  • the base station may allocate a larger common resource for the D2D device.
  • the base station may allocate a smaller common resource for the D2D device. For example, when receiving the first PRACH sequence from the D2D device, the base station allocates the first common resource to the D2D device, and when the number of received PRACH sequences exceeds the first threshold, the base station allocates the second common resource to the D2D device.
  • the second public resource is larger than the first public resource.
  • the base station dynamically adjusts the size of the common resource according to the number of received PRACH sequences. When the number of received PRACH sequences is large, the resources allocated to the D2D device may be increased, thereby satisfying the resources of the D2D device. demand.
  • the method further includes the step 303, the base station notifying the D2D device of the information about the allocated common resource, for example, the base station periodically notifying the D2D device of the information of the allocated common resource, and the base station periodically broadcasts.
  • This common resource can be shared by all D2D devices and used to search for information about other D2D devices.
  • the D2D device applying for the resource sends its own D2D device code code information on the common time-frequency resource. After obtaining the time-frequency resource location information, the D2D device searches for the time-frequency resource location. If other D2D devices are found, the discovery is successful.
  • the D2D device can learn the allocated common resources, thereby using the common resource to detect and/or listen to information sent by other D2D devices.
  • the location of the notification public resource can be implemented by at least one of the following:
  • the base station can notify the D2D device in the active state of the information of the allocated common resource by using control signaling.
  • control signaling For example, for an active (Active) UE, the default is 10ms, gp, and the location of each notification is a time-frequency resource available in one radio frame (10ms), and the physical downlink control channel is passed every 10ms (Physical Downlink Control). Channel, referred to as PDCCH for short), notifies the time-frequency resource once.
  • the base station notifies the D2D device in the idle state of the information of the allocated common resource through the common signaling.
  • the time-frequency resource location information may be sent by using a common signaling, where the common signaling may be a physical broadcast channel (PBCH) or a cell-specific (Cell).
  • PBCH physical broadcast channel
  • Cell cell-specific
  • Specific physical downlink control channel Physical Downlink Shared Channel, abbreviated as PDSCH.
  • the information of the allocated common resource includes time-frequency resource location information of the allocated common resource, and the allocated At least one of a valid time of the public resource and a period of the allocated common resource.
  • the base station may send only the time-frequency resource location information of the allocated common resource to the D2D device, and the D2D device may detect and/or listen to the information sent by the other D2D device at the position corresponding to the time-frequency resource location information at any time;
  • the base station may further send the time-frequency resource location information of the allocated common resource and the effective time of the allocated common resource to the D2D device, where the D2D device detects and/or listens to other D2Ds at the location corresponding to the time-frequency resource location information.
  • the information sent by the device may further send the time-frequency resource location information and the allocated common resource period to the D2D device, and the D2D device learns the periodic time-frequency resource according to the time-frequency resource location information and the allocated common resource period, and Detecting and/or listening to information sent by other D2D devices on a periodic time-frequency resource; if it is initially starting to allocate resources, the base station may specify a time when a resource starts to take effect, and the time required for the D2D device to apply for access needs to be satisfied. The person can hear the broadcast information once, for example, the time can be 320ms. With this embodiment, the base station can notify the D2D device of the common resource related information, so that the D2D device can use the common resource more accurately.
  • the base station may allocate a dedicated resource to the D2D device that sends the PRACH request.
  • the PRACH request includes a PRACH sequence.
  • the base station allocates a dedicated resource for each D2D device in the at least one D2D device in the common resource, where the dedicated resource is used by the D2D device to send information on the dedicated resource.
  • the dedicated resource may be a dedicated time-frequency resource, which is a time-frequency resource used by the D2D device for discovery or communication. After obtaining the dedicated resource, the D2D device can transmit information on the resource.
  • the correspondence may be a one-to-one correspondence, and may be a one-to-many correspondence, or a many-to-one correspondence, and the correspondence may be represented by a correspondence table, and may also be represented by a certain function relationship.
  • a dedicated resource available for communication can be allocated to a D2D device that transmits a PRACH request.
  • the embodiment for allocating dedicated resources is independent of the embodiment for allocating common resources.
  • the method for allocating common resources may adopt the method shown in FIG. 3 or other methods. Any allocation method, for example, one subframe is fixed as a common resource every 80ms. This embodiment of the present invention does not limit this.
  • the base station For a base station supporting a D2D device to access an LTE network, the base station reserves a part of the PRACH sequence dedicated to the D2D device access, renumbers the PRACH sequence number (gp, Preamble sequence number) used for the D2D device, and allocates the resource and the resource. Location binding.
  • the base station may support (64+128) PRACH sequences; the D2D device uses the last 128 sequences by default, and renumbers the PRACH sequences dedicated to the D2D device to 0, 1, 2, ..., 127; For the N (RB), the PRACH sequence number used by the D2D device is M.
  • the index of the dedicated resource that can be used for a period of time is mod(M, N).
  • the base station determines the size of the allocated dedicated resource according to the correspondence between the PRACH sequence and the size of the dedicated resource; and determines the starting position of the allocated dedicated resource according to the following formula:
  • S1 is the index of the starting position of the allocated dedicated resource
  • M is the PRACH sequence
  • N is the total number of resources in the public resource
  • mod is the modulo operation
  • the base station may support (64+128) PRACH sequences; the D2D device uses the last 128 sequences by default, and renumbers the PRACH sequences dedicated to the D2D device to 0, 1, 2, ..., 127;
  • N the PRACH sequence number used by the D2D device is M.
  • the start position of the fixed-time resource that can be used for a period of time is mod(M,N). If M ⁇ 100, the requested resource size is 1 RB; otherwise, the resource requested for allocation is a continuous 2 RB.
  • the unit of the resource may be a resource block (Resource Block, RB for short).
  • Resource Block Resource Block
  • the bandwidth is 10 MHz
  • the number of available RBs is 50
  • the resource index may be from 0 to 49.
  • the base station can conveniently allocate dedicated resources for the D2D device.
  • the base station After allocating dedicated resources for each D2D device in the at least one D2D device, the base station sends a random access response message to each D2D device in the at least one D2D device, so as to indicate the dedicated resource corresponding to the at least one D2D device.
  • the assignment was successful.
  • the D2D device Upon receiving the random access response message, the D2D device can determine that the time-frequency resource indicated by the PRACH sequence is requested, and can use the time-frequency resource to transmit information.
  • the base station can notify the D2D device that it has allocated a dedicated resource, and then the D2D device can transmit the information using the dedicated resource.
  • the base station can correctly detect the PRACH sequence sent by the D2D device, but the PRACH sequence is hidden
  • the time-frequency resource with the request cannot be allocated to the device, and the base station does not feed back any information to the D2D device.
  • the D2D device After receiving the PRACH request, the D2D device does not receive the random access response message of the base station within a predetermined time period, and automatically selects another PRACH sequence to request access again.
  • the base station can listen to the usage status of the common resource. Alternatively, if the base station detects that the common resource is not used within the first predetermined time period, the allocated common resource is released. After receiving the PRACH request from the D2D device next time, the base station can allocate the common resources for the D2D device in the manner of the embodiment of the present invention. In this embodiment, if the base station detects that the common resource is not used within a predetermined time period, the common resource is released, and the public resource may be allocated to other devices for use, for example, the part of the resource is allocated to the common The LTE UE uses to cancel the transmission of the PDCCH and the PBCH or Cell specific PDSCH. Thereby avoiding the waste of resources. Preferably, after the base station reclaims the allocated resources, the D2D device may be notified by broadcast signaling that the resources are released, and the D2D device no longer uses the recycled resources.
  • the base station after the base station allocates the common resource for the D2D device according to the PRACH sequence, the base station notifies the D2D device of the available time period of the common resource, for example, the first available time period, if the D2D device is not using the allocated resource. If the D2D function is to be used after the time exceeds the first available time period, the base station is re-requested to allocate resources.
  • the first available time period may be the same as the first predetermined time period.
  • the resource allocation manner is valid for a certain period of time, and if the set time is exceeded, the allocated resources are automatically invalidated. At this time, if the D2D device has data interaction with the LTE network, the D2D device can re-apply for resources.
  • the embodiment of the present invention further provides a base station, where the base station can be used to implement the foregoing method embodiments. Therefore, related features of the base station in the foregoing method embodiments may be combined in this embodiment.
  • the base station includes: a receiving unit 400, configured to receive a PRACH request sent by at least one D2D device; and an allocating unit 402, connected to the receiving unit 400, configured to allocate a common resource for the D2D device according to the PRACH request. .
  • FIG. 5 is a block diagram of a preferred structure of a base station according to an embodiment of the present invention.
  • the PRACH request includes a PRACH sequence.
  • the base station further includes: a determining unit 404, connected to the receiving unit 400, and The unit 402 is configured to determine, before the allocation unit 402 allocates a common resource dedicated to the D2D device according to the PRACH request, that the PRACH sequence belongs to the first predetermined set, where the first predetermined set is ⁇ A dedicated to the sequence used by the D2D device.
  • the foregoing common resource is used by the D2D device to detect and/or listen to information sent by other D2D devices on the common resource.
  • the allocating unit 402 is configured to allocate a common resource for the D2D device when the preset condition is met; the preset condition includes at least one of the following:
  • the PRACH request is the first PRACH request received from the D2D device
  • Public resources have not been allocated before receiving a PRACH request.
  • the last public resource allocated is released.
  • the allocating unit 402 is configured to re-establish the public resource according to the usage of the public resource and the number of D2D devices corresponding to the PRACH request. Allocating a common resource for the D2D device; or, reallocating the common resource for the D2D device according to the size of the last allocated common resource, the number of currently accessed D2D devices, and the number of D2D devices corresponding to the PRACH request .
  • the base station further includes: a sending unit 406, connected to the allocating unit 402, configured to notify the D2D device of the information of the allocated common resource.
  • the sending unit 406 is configured to notify the D2D device in the active state of the information of the allocated common resource by using control signaling; and/or notify the D2D device in the idle state of the information of the allocated common resource by using common signaling.
  • the information of the allocated common resource includes at least one of time-frequency resource location information of the allocated common resource, an effective time of the allocated common resource, and a period of the allocated common resource.
  • the PRACH request includes a PRACH sequence
  • the allocating unit 402 is further configured to allocate, according to the correspondence between the PRACH sequence and the dedicated resource, a dedicated resource for each D2D device in the at least one D2D device in the common resource, where Dedicated resources are used to send information on dedicated resources by D2D devices.
  • the allocation unit 402 is configured to:
  • S is the index of the allocated dedicated resource
  • M is the index of the PRACH sequence
  • N is the total number of resources in the common resource
  • mod is the modulo operation
  • S1 is the index of the starting position of the allocated dedicated resource
  • M is the cable of the PRACH sequence
  • N is public
  • mod represents the modulo operation.
  • the foregoing base station further includes: a sending unit 406, connected to the allocating unit 402, configured to send a random access response message to each D2D device in the at least one D2D device, so as to indicate the dedicated resource allocation corresponding to the at least one D2D device. success.
  • a sending unit 406 connected to the allocating unit 402, configured to send a random access response message to each D2D device in the at least one D2D device, so as to indicate the dedicated resource allocation corresponding to the at least one D2D device. success.
  • the base station includes: a detecting unit 408, connected to the allocating unit 402, configured to detect whether a common resource is used; and a releasing unit 410 connected to the detecting unit 408, configured to be in the detecting unit 408 In the case where it is detected that the common resource is not used within the first predetermined time period, the allocated common resource is released.
  • the base station in FIG. 5 includes the determining unit 404, the sending unit 406, the detecting unit 408, and the releasing unit 410
  • the base station in the embodiment of the present invention is not limited to include the determining unit 404, the sending unit 406,
  • the detecting unit 408 and the releasing unit 410 for example, the base station may include the determining unit 404 and/or the transmitting unit 406 without including the detecting unit 408 and the releasing unit 410; the base station may also include the detecting unit 408 and the releasing unit 410 without including the determination.
  • the embodiment of the present invention further provides a D2D device, which can be used to implement the foregoing method embodiments.
  • the D2D device includes: a sending unit 600, configured to send a PRACH request to a base station, so that the base station allocates a common resource for the D2D device according to the PRACH request, and a receiving unit 602, configured to receive, by the base station, Information about the assigned public resources.
  • FIG. 7 is a block diagram of a preferred structure of a D2D device according to an embodiment of the present invention.
  • the PRACH request preferably includes a PRACH sequence.
  • the D2D device further includes: a selecting unit 604, connected to the sending unit 600, The PRACH sequence is selected from the first predetermined set before the PRACH request sent by the transmitting unit 600 to the base station, and the first predetermined set is a set of sequences dedicated to the D2D device.
  • the common resource is used by the D2D device to detect and/or listen to information sent by other D2D devices on the common resource.
  • the public resource is allocated by the base station when the preset condition is met;
  • the preset condition includes at least one of the following:
  • the PRACH request is a PRACH request received by the base station from the D2D device for the first time;
  • the public resource has not been allocated before the base station receives the PRACH request.
  • the base station When the base station receives the PRACH request, the last allocated public resource is released.
  • the common resource allocated by the base station according to the PRACH request is:
  • the public resources for the D2D device are reallocated according to the size of the last allocated common resource, the number of currently accessed D2D devices, and the number of D2D devices corresponding to the PRACH request.
  • the receiving unit 602 is configured to receive control signaling sent by the base station, where the control signaling includes information about the allocated common resource; and/or, the receiving unit 602 is configured to receive the common signaling sent by the base station, where The public signaling contains information about the allocated common resources.
  • the information of the allocated common resource includes at least one of time-frequency resource location information of the allocated common resource, an effective time of the allocated common resource, and a period of the allocated common resource.
  • the PRACH request includes a PRACH sequence; the PRACH sequence has a correspondence with a dedicated resource allocated for the D2D device for transmitting information on the dedicated resource by the D2D device.
  • the foregoing correspondence includes:
  • S is the index of the allocated dedicated resource
  • M is the index of the PRACH sequence
  • N is the total number of resources in the common resource
  • mod is the modulo operation
  • S1 is the index of the starting position of the allocated dedicated resource
  • M is the PRACH sequence
  • N is the total number of resources in the public resource
  • mod is the modulo operation
  • the receiving unit 602 is configured to receive the random access response message sent by the base station, where the random access response message is used to indicate that the dedicated resource corresponding to the D2D device is successfully allocated.
  • the embodiment of the present invention further provides a base station, where the base station can be used to implement the foregoing method embodiments. Therefore, related features of the base station in the foregoing method embodiments may be combined in this embodiment.
  • the base station includes: a transceiver 800, configured to send and receive signals; a processor 802, configured to: receive, by the transceiver 800, a PRACH request sent by at least one D2D device; and allocate, according to the PRACH request, a D2D device. Public resource.
  • the PRACH request includes a PRACH sequence
  • the processor 802 is configured to: before the public resource dedicated to the D2D device is allocated according to the PRACH request, determine that the PRACH sequence belongs to the first predetermined set, and the first predetermined set is dedicated to use by the D2D device. A collection of sequences.
  • the common resource is used by the D2D device to detect and/or listen to information sent by other D2D devices on the common resource.
  • the processor 802 allocates a common resource for the D2D device according to the PRACH request by:
  • the common resource for the D2D device is allocated; the preset condition includes at least one of the following.
  • the PRACH request is the first received PRACH request from the D2D device;
  • Public resources have not been allocated before receiving a PRACH request.
  • the last public resource allocated is released.
  • the processor 802 allocates a common resource for the D2D device according to the PRACH request by:
  • the common resources for the D2D device are reallocated according to the size of the last allocated common resource, the number of currently accessed D2D devices, and the number of D2D devices corresponding to the PRACH request.
  • the processor 802 is configured to: notify, by the transceiver 800, information about the allocated common resource to the D2D device.
  • the processor 802 implements the notification to the D2D device of the allocated common resource by: notifying the D2D device in the active state of the information of the allocated common resource by using control signaling; and/or, by public signaling, to the D2D in the idle state. The device notifies the information of the assigned public resource.
  • the information of the allocated common resource includes at least one of time-frequency resource location information of the allocated common resource, an effective time of the allocated common resource, and a period of the allocated common resource.
  • the PRACH request includes a PRACH sequence
  • the processor 802 is configured to: allocate, according to a correspondence between the PRACH sequence and the dedicated resource, a dedicated resource for each D2D device in the at least one D2D device in the common resource, where the dedicated resource is used by the D2D
  • the device sends information on a dedicated resource.
  • the processor 802 allocates a dedicated resource for each D2D device in the at least one D2D device within the common resource according to the correspondence between the PRACH sequence and the dedicated resource in the following manner: Determine the assigned dedicated resources according to the following formula:
  • S is the index of the allocated dedicated resource
  • M is the index of the PRACH sequence
  • N is the total number of resources in the common resource
  • mod is the modulo operation
  • S1 is the index of the starting position of the allocated dedicated resource
  • M is the PRACH sequence
  • N is the total number of resources in the public resource
  • mod is the modulo operation
  • the processor 802 is configured to: send, by the transceiver 800, a random access response message to each D2D device in the at least one D2D device, so as to indicate that the dedicated resource allocation corresponding to the at least one D2D device is successfully allocated.
  • the processor 802 is further configured to release the allocated common resource if the common resource is not used within the first predetermined time period.
  • the embodiment of the present invention further provides a D2D device, which can be used to implement the foregoing method embodiments. Therefore, related features of the D2D device in the foregoing method embodiments may be combined in this embodiment.
  • the D2D device includes: a transceiver 900, configured to send and receive signals; and a processor 902, configured to: send, by the transceiver 900, a PRACH request to the base station, so that the base station allocates the D2D device according to the PRACH request. Public resource; receiving, by the transceiver 900, information of the allocated common resource sent by the base station.
  • the PRACH request includes a PRACH sequence
  • the processor 902 is configured to select a PRACH sequence from the first predetermined set before the D2D device sends the PRACH request to the base station, where the first predetermined set is a set dedicated to the sequence used by the D2D device. .
  • the common resource is used by the D2D device to detect and/or listen to information sent by other D2D devices on the common resource.
  • the public resource is allocated by the base station when the preset condition is met;
  • the preset condition includes at least one of the following:
  • the PRACH request is a PRACH request received by the base station from the D2D device for the first time;
  • the public resource has not been allocated before the base station receives the PRACH request; and When the base station receives the PRACH request, the last allocated public resource is released.
  • the common resource allocated by the base station according to the PRACH request is:
  • the public resources for the D2D device are reallocated according to the size of the last allocated common resource, the number of currently accessed D2D devices, and the number of D2D devices corresponding to the PRACH request.
  • the processor 902 is configured to: receive, by using the transceiver 900, information about the allocated common resource sent by the base station, by: receiving, by the transceiver 900, control signaling sent by the base station, where the control signaling includes the allocated And the public signaling sent by the base station is received by the transceiver 900, where the public signaling includes the information of the allocated common resource.
  • the information of the allocated common resource includes at least one of time-frequency resource location information of the allocated common resource, an effective time of the allocated common resource, and a period of the allocated common resource.
  • the PRACH request includes a PRACH sequence; the PRACH sequence has a correspondence with a dedicated resource allocated for the D2D device for transmitting information on the dedicated resource by the D2D device.
  • the foregoing correspondence includes:
  • S is the index of the allocated dedicated resource
  • M is the index of the PRACH sequence
  • N is the total number of resources in the common resource
  • mod is the modulo operation
  • S1 is the index of the starting position of the allocated dedicated resource
  • M is the PRACH sequence
  • N is the total number of resources in the public resource
  • mod is the modulo operation
  • the processor 902 is configured to receive, by using a receiver, a random access response message sent by the base station, where the random access response message is used to indicate that the dedicated resource allocation corresponding to the D2D device is successful.
  • the processor in the above embodiment of the present invention may be a baseband processor, or an integrated circuit chip, which has signal processing capability, and may also be a hardware processor such as a central processing unit (CPU).
  • CPU central processing unit
  • each step of the above method may be integrated by logic of hardware in the processor.
  • the instructions in the form of a road or software are completed. These instructions can be implemented and controlled by the processor in them.
  • the foregoing processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), and an on-site Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA Field Programmable Gate Array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or executed.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor, decoder or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a computer.
  • the computer readable medium may include a random access memory (RAM), read-only memory (ROM), and an electrically erasable programmable read only memory.
  • EEPROM Electrically Erasable Programmable Read-Only Memory
  • CD-ROM Compact Disc Read-Only Memory
  • Any connection may suitably be a computer readable medium.
  • the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave.
  • DSL Digital Subscriber Line
  • a disk and a disc include a compact disc (Compact Disc, CD for short), a laser disc, a compact disc, a digital Versatile Disk (DVD), a floppy disk, and a Blu-ray.
  • Optical discs in which discs are usually magnetically replicated, while discs use lasers to optically replicate data. Combinations of the above should also be included within the scope of the computer readable media.
  • the above description is only a preferred embodiment of the technical solution of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

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Abstract

La présente invention concerne un procédé d'allocation de ressource, une station de base et un dispositif D2D. Le procédé consiste à recevoir une demande PRACH envoyée par au moins un dispositif D2D et à allouer une ressource publique à utiliser par le dispositif D2D selon la demande PRACH. Par le biais de l'invention, la station de base peut allouer de manière flexible une ressource au dispositif D2D afin de satisfaire une exigence du dispositif D2D liée à la ressource.
PCT/CN2012/084765 2012-11-16 2012-11-16 Procédé d'allocation de ressource, station de base et dispositif d2d WO2014075299A1 (fr)

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CN201280076731.3A CN104770029B (zh) 2012-11-16 2012-11-16 资源分配方法、基站及d2d设备

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016048003A1 (fr) * 2014-09-22 2016-03-31 엘지전자 주식회사 Procédé et appareil d'émission-réception d'un signal de d2d d'une ressource prach
CN106408930A (zh) * 2015-07-31 2017-02-15 中国联合网络通信集团有限公司 一种实现组建行驶车队的方法及装置
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