JP2018207513A - Resource selection device and communication system - Google Patents

Abstract

To provide a base station capable of securing continuity of D2D communication, and avoiding interruption by selecting a resource corresponding to a user device to perform D2D communication.SOLUTION: A target base station receives a first signal including information related to D2D communication of user equipment from a source base station (403), and transmits a second signal including configuration information to the source base station (404), and receives a third signal related to radio connection from the user equipment (UE) (407). The configuration information includes at least one of information related to a resource pool configured in accordance with a second mode, information indicating whether to support a resource allocation system of a first mode and information including a resource position of a resource allocated in accordance with the first mode.SELECTED DRAWING: Figure 4A

Description

  The present invention relates to the communication field, and more particularly, to a resource selection device and a communication system.

  Device-to-device (D2D, Device-to-Device) communication method means that communication of data packets does not need to go through the core network and thus the base station, and is a communication link between two user devices (UE1 and UE2) This is done by establishing directly. FIG. 1 is a diagram illustrating that two user apparatuses belonging to the same base station establish D2D communication, and FIG. 2 is a diagram illustrating that two user apparatuses belonging to different base stations establish D2D communication. It is.

  Before the user equipment directly performs D2D communication, the base station needs to allocate communication resources for the user equipment. Modes in which the base station allocates D2D communication resources include mode 1 (Mode 1) and mode 2 (Mode 2).

  The mode 1 resource allocation scheme is an allocation scheme scheduled by the base station. Before the base station schedules mode 1 resources, the user equipment enters the radio resource control (RRC, Radio Resource Control) connection state (RRC_Connected state) and uses a method such as buffer state report (BSR, Buffer State Report). A resource request needs to be sent to the base station. The base station can allocate resources for the user equipment after receiving the request.

  The resource allocation scheme in mode 2 is a scheme in which the base station notifies the user apparatus of the time frequency position of the resource pool by broadcast or dedicated signaling. When the user apparatus is not covered by the base station, the mode 2 resource pool can be set in advance for the user apparatus. After obtaining the resource pool, the user apparatus can voluntarily select a resource for D2D communication from the resource pool.

  The introduction of the background art described above is intended to clearly and completely explain the technical solution of the present invention so that those skilled in the art can easily understand it. These technical solutions are described in the background section of the present invention and should not be construed as well known to those skilled in the art.

  For user equipment not covered by the base station, only mode 2 resources can be used. However, for a user apparatus that can use all of the two types of resource allocation modes, there is still no method for solving which mode resource is selected and used.

  In order to solve the above-described problem, an embodiment of the present invention provides a resource selection device and a communication system, and by using the device, a user device selects a corresponding resource and performs communication, thereby enabling continuous D2D communication. Keeps sex and avoids interruptions.

According to a first aspect of an embodiment of the present invention, a resource selection device is provided, which comprises:
A first selection unit, which receives the physical layer synchronization loss indication information after the user device disconnects from the first base station, and A first period until the first resource allocated according to the first mode is received by the second base station that has re-established the connection, or a configuration in which the user apparatus triggers a handover of the user apparatus to the second base station A second period from receiving information to receiving a first resource allocated according to the first mode by the second base station, or after the user device initializes re-establishment, A third period until the first resource allocated according to the first mode is received by the second base station reestablishing the connection, or after the user device transmits a re-establishment request, the user device A resource pool configured according to the second mode by the first base station or the second base station in the fourth period until receiving the first resource allocated according to the first mode by the second base station reestablishing the connection of Used to select a device-to-device (D2D) communication resource from among them.

According to a second aspect of an embodiment of the present invention, a resource selection device is provided, which comprises:
Based on the measurement result transmitted by the user apparatus, for transmitting a transmission handover request to the second base station, the handover request includes information that the user apparatus is performing D2D communication, and Or a first transmission unit including an allocation mode and resource location of D2D communication resources used by the user equipment;
The configuration information is received by the second base station based on the handover request, and the configuration information includes a resource pool time configured by the second base station based on the second mode. Frequency location and / or information indicating whether the second base station supports the resource allocation scheme of the first mode and / or resource location of resources allocated by the second base station according to the first mode A first receiving unit; and a first configuration unit for configuring the configuration information in the user equipment.

According to a third aspect of an embodiment of the present invention, a communication system is provided, which includes a first base station, a second base station and a user equipment, of which
After the user apparatus disconnects from the first base station, the user apparatus receives the physical layer synchronization loss instruction information and then reestablishes the connection with the user apparatus in the first mode. By the second base station after receiving the first period until receiving the first resource allocated according to the configuration information that triggers the handover of the user apparatus to the second base station or the user apparatus The second period until the first resource allocated according to the first mode is received, or the second base station that reestablishes the connection with the user apparatus after the user apparatus initializes the reestablishment. A third period until the first resource allocated according to the mode is received, or after the user apparatus transmits a re-establishment request, the first base station reestablishes the connection with the user apparatus in the first mode. In the fourth period until receiving the first resource allocated according to the device, the user equipment communicates with the device-to-device (D2D) communication from the resource pool configured according to the second mode by the first base station or the second base station. Select resources for

  The beneficial effect of the embodiment of the present invention is that the user apparatus performs communication using a resource selected from the resource pool configured according to the second mode by the first base station or the second base station in a predetermined period. This allows the user equipment to maintain the continuity of D2D communication and avoid interruption by selecting the corresponding resource and performing D2D communication in scenarios such as handover or re-establishment after failure. It can be done.

  Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, which illustrate aspects in which the principles of the invention can be employed. In addition, embodiment of this invention is not limited by these on the range. Within the scope of the appended claims, embodiments of the invention may include various changes, modifications, and alternatives.

  Also, the features described and / or illustrated for one embodiment may be used in one or more other embodiments in the same or similar manner and may be combined with or combined with features in other embodiments. The features in can also be replaced.

  It should be noted that a term such as “comprising / having” as used herein refers to the presence of a feature, element, step, or assembly, but one or more other features, elements, steps, Or it does not exclude the presence or addition of assemblies.

The included drawings are used to provide a further understanding of the embodiments of the invention, which form part of the present specification, illustrate embodiments of the invention, and Together with the description, it will be used to explain the principles of the invention. Also, as will be apparent, the drawings described below are only for the purpose of illustrating some embodiments of the invention, and those skilled in the art will be able to based on these drawings without creative labor. Other drawings can also be obtained.
It is a figure which shows that two user apparatuses which belong to the same base station establish D2D communication. It is a figure which shows that two user apparatus which belongs to a different base station establishes D2D communication. 3 is a flowchart of a resource selection method in Embodiment 1 of the present invention. 10 is a flowchart of a resource selection method in Embodiment 2 of the present invention. 10 is a flowchart of a resource selection method in Embodiment 2 of the present invention. 10 is a flowchart of a resource selection method in Embodiment 3 of the present invention. 10 is a flowchart of a resource selection method in Embodiment 3 of the present invention. FIG. 10 is a diagram showing a configuration of a resource selection device in Embodiment 4 of the present invention. FIG. 10 is a diagram showing a configuration of a user device in Embodiment 5 of the present invention. FIG. 10 is a diagram illustrating a configuration of a resource selection device according to Example 6 of the present invention. FIG. 10 is a diagram showing the configuration of a base station in Example 7 of the present invention. FIG. 10 is a diagram showing the configuration of a base station in Example 8 of the present invention. FIG. 10 is a diagram showing a configuration of a communication system in Example 9 of the present invention.

  The foregoing and other features of the present invention will become apparent upon reference to the accompanying drawings and the following description. While the specification and drawings disclose certain embodiments of the invention, it illustrates some embodiments that may employ the principles of the present invention. It should be understood that the invention is not limited to the described embodiments, but includes all modifications, variations, and alternatives falling within the scope of the appended claims. Various embodiments of the present invention will be described below with reference to the drawings.

  Embodiment 1 of the present invention provides a resource selection method, and FIG. 3 is a flowchart of the method. As shown in FIG. 3, the method includes the following steps.

  Step 301: After the user equipment disconnects from the first base station, the user equipment receives the physical layer synchronization loss instruction information, and then the second base station reestablishes the connection with the user equipment. A first period until receiving a first resource allocated according to one mode, or after receiving configuration information that triggers a handover of the user apparatus to a second base station, the second base A second period until receiving a first resource allocated according to the first mode by the station, or by a second base station re-establishing a connection with the user equipment after the user equipment has initialized re-establishment The third period until the first resource allocated according to the first mode is received, or the second base station that re-establishes the connection with the user device after the user device transmits the re-establishment request. In the fourth period until the first resource allocated according to the first mode is received, the user apparatus performs D2D communication from the resource pool configured according to the second mode by the first base station or the second base station. Select resources for

  In the present embodiment, the first resource allocated according to the first mode by the base station may be a resource allocated according to the allocation scheme scheduled by the base station, and may be referred to as a mode 1 resource. The resource pool configured according to the second mode may be referred to as a mode 2 resource pool. The user apparatus selects a resource for performing D2D communication from the resource pool, and the first mode and the second mode correspond to Mode 1 and Mode 2 described in the background art section.

  As can be seen from the above embodiment, the user equipment is assigned according to the first mode by the other base station when it is disconnected from the one base station and then connected again with the other base station. Before receiving the first resource, by selecting the resource for D2D communication from the resource pool configured according to the second mode by the above base station, it is possible to maintain the continuity of D2D communication and avoid interruption it can.

  In this embodiment, under a handover scenario, the first base station may be a source base station, the second base station may be a target base station, or a re-establishment scenario after a failure. Below, the first base station may be a base station where the user apparatus is located when a failure occurs, and the second base station may be a base station that re-establishes a connection with the user apparatus, The second base station may be the first base station or another base station.

For example, for a re-establishment after failure scenario, the user equipment disconnects from the first base station when a failure occurs, and the user equipment triggers the re-establishment initialization process and selects the appropriate cell. Re-establish a connection to the cell's base station, eg, a second base station. Among them, the re-establishment initialization process can be triggered when a radio link failure (RLF), a handover failure, a base station reconfiguration failure, or a lower layer integrity check failure occurs.

  In this embodiment, when the failure that triggers the re-establishment initialization process is a radio link failure (RLF), the user equipment receives physical layer synchronization loss indication information and then communicates with the user equipment. In the first period (T1) until receiving the first resource allocated according to the first mode by the second base station that has reestablished the connection, the user equipment transmits the first resource allocated according to the first mode by the base station. A resource for performing D2D communication is selected from a resource pool configured according to the second mode by the first base station or the second base station without using the resource.

  In this embodiment, when the failure to trigger the re-establishment initialization process is a handover failure, the user equipment receives configuration information that triggers a handover of the user equipment to the second base station, and then In the second period (T2) until the first resource allocated according to the first mode by the second base station is received, the user apparatus does not use the first resource allocated according to the first mode by the base station. The resource for performing D2D communication is selected from the resource pool configured according to the second mode by the first base station or the second base station.

  In this embodiment, when the failure to trigger the re-establishment initialization process is a base station reconfiguration failure, a lower layer integrity check failure, or a handover failure, the user device initializes re-establishment and then In the third period (T3) until receiving the first resource allocated according to the first mode by the second base station reestablishing the connection of the user equipment, the user equipment A resource for performing D2D communication is selected from a resource pool configured according to the second mode by the first base station or the second base station without using one resource.

  In this embodiment, when the failure that triggers the re-establishment initialization process is a handover failure, the user equipment transmits a re-establishment request, and then the second base station that re-establishes the connection with the user equipment. In the fourth period (T4) until the first resource allocated according to the first mode is received, the user apparatus does not use the first resource allocated according to the first mode by the base station, and the first base station Alternatively, a resource for performing D2D communication is selected from a resource pool configured according to the second mode by the second base station.

For example, for a handover scenario, the user equipment disconnects from the first base station after receiving configuration information that triggers a handover of the user equipment to the second base station, and by a random access process, Establish a connection with the second base station.

  The second period from when the user apparatus receives the configuration information that triggers the handover of the user apparatus to the second base station until the first resource allocated according to the first mode by the second base station is received. In the period (T2), the user apparatus does not use the first resource allocated according to the first mode by the base station, but from the resource pool configured according to the second mode by the first base station or the second base station. Select a resource for D2D communication.

  As can be seen from the above-described resource selection method in the present embodiment, the user apparatus performs according to the second mode by the first base station or the second base station in the first period, the second period, the third period, or the fourth period. Communication can be performed using the resource selected from the configured resource pool, which allows the user equipment to perform D2D communication by selecting the corresponding resource in a scenario such as handover or re-establishment after failure. Therefore, continuity of D2D communication can be guaranteed.

  In the present embodiment, in the first period, the second period, the third period, or the fourth period, the user apparatus may select a resource in a resource pool configured by the first base station. You may select the resource in the resource pool comprised by the station. Further, resources can be selected by employing the following method.

  The user apparatus selects a resource for performing D2D communication from the resource pool configured by the second base station after receiving the resource pool configured by the second base station according to the second mode, and The user apparatus performs D2D communication from the resource pool configured according to the second mode by the first base station before receiving the resource pool configured according to the second mode by the second base station. Select a resource.

  For example, the user equipment may use a mode 2 resource pool configured by the source base station or the target base station when performing inter-cell handover; or the user equipment is configured by the target base station A resource for performing D2D communication may be selected from among the resource pools configured by the target base station after the received resource pool is received, and the user apparatus may select a resource pool configured by the target base station Before receiving the resource, a resource for performing D2D communication may be selected from the resource pool configured by the source base station.

  For example, when re-establishing after a failure, the user equipment may use the mode 2 resource pool configured by the base station where the user equipment is located when the failure occurs or the base station that has re-established the connection; Or, after receiving the mode 2 resource pool configured by the base station that has reestablished the connection, the user apparatus allocates resources for communication from the resource pool configured by the base station that has reestablished the connection. The user equipment may select a D2D from among the resource pools configured by the base station where the user equipment is located before the user equipment receives the resource pool configured by the base station that has reestablished the connection. You may select the resource for performing communication.

In this embodiment, as shown in FIG. 3, the method may further include the following steps:
Step 302: The user equipment receives the first resource allocated according to the first mode by the second base station, or the second base station instructs the user equipment to use the first resource. When the instruction information is received, the resource pool is released.

  Among them, after the user apparatus is connected to the second base station and after receiving the instruction information, the user apparatus stops using the mode 2 resource and releases the mode 2 resource pool. And requesting the first resource from the second base station, and the user equipment uses the first resource after obtaining the first resource allocated by the base station.

  The resource pool described above may include a resource pool configured according to the second mode by the first base station and / or the second base station.

  For example, when the user apparatus performs inter-cell handover, after receiving the mode 1 resource allocated by the target base station, the user apparatus configures the mode 1 resource for the MAC layer and simultaneously configures the mode 2 resource. Or when the user equipment receives the target base station indication information, that is, the indication information for instructing the user equipment to use the mode 1 resource, the user equipment You can stop using it, release the mode 2 resource pool, and also request mode 1 resources from the target cell.

  For example, when the user equipment performs re-establishment after failure, the user equipment configures mode 1 resources for the MAC layer after receiving the mode 1 resources allocated by the base station that has re-established the connection. Release the mode 2 resource; or the user equipment receives the instruction information of the base station that has reestablished the connection, that is, the instruction information to instruct the user equipment to use the mode 1 resource. At this time, the use of the mode 2 resource is stopped, the mode 2 resource pool is released, and the mode 1 resource can be requested to the base station that has reestablished the connection.

  In the present embodiment, when the user apparatus uses a relatively short time until the handover succeeds, the relatively short handover process does not need to use the resource pool configured according to the second mode. The method may further include the following: successful handover to the second base station within a first predetermined time after the user equipment receives the reconfiguration information. The second period includes a period from when the first predetermined time is exceeded until the first resource is received, of which the user apparatus stores the configuration information Less than the time from reception until successful connection to the second base station.

  In this embodiment, if the time used by the user equipment re-establishment process is relatively short, the relatively short re-establishment process does not need to use the resource pool configured according to the second mode. In addition, the third period may include the following: if the user equipment cannot select an appropriate cell within a second predetermined time after re-establishing re-establishment, It includes a period from when the second predetermined time is exceeded until the first resource is received. Among these, the second predetermined time is a time from the re-establishment initialization until an appropriate cell can be selected. Smaller than.

  In this embodiment, before the user equipment performs a handover and disconnects from the first base station, the method may further include the following, that is, constituted by the first base station: Receiving configuration information.

  Among them, the configuration information is information indicating the time frequency position of the resource pool configured according to the second mode by the second base station and / or whether the second base station supports the resource allocation scheme of the first mode. And / or resource location of resources allocated according to the first mode by the second base station.

  In this embodiment, when the user apparatus performs a handover, the first base station can transmit a handover request to the second base station based on the measurement result transmitted by the user apparatus, The handover request includes information that the user apparatus is performing D2D communication and / or an allocation mode and resource position of a D2D communication resource used by the user apparatus, and the first base station After receiving the configuration information returned by the station based on the handover request, the configuration information is configured in the user equipment, that is, a reconfiguration process is performed.

  As can be seen from the above-described resource selection method in the present embodiment, the user apparatus uses the resource selected from the resource pool configured according to the second mode by the first base station or the second base station in a predetermined period. D2D communication can be performed, which can make it convenient for the user apparatus to perform D2D communication by selecting a corresponding resource in a scenario such as handover or re-establishment after failure.

  Hereinafter, the resource selection method will be described in detail by taking a handover scenario and a scenario for re-establishment after failure as examples.

  Embodiment 2 of the present invention provides a resource selection method, which corresponds to a scenario in which user equipment performs handover between cells. The method includes: after the user equipment disconnects from a source base station, the user equipment receives configuration information that triggers a connection of the user equipment to a target base station; In the second period until the first resource allocated according to the mode is received, the user apparatus allocates a resource for performing D2D communication from the resource pool configured according to the second mode by the source base station or the target base station. Including selecting.

  In the present embodiment, the implementation method of the resource pool configured in accordance with the first resource allocated in accordance with the first mode and the second mode is the same as that in the first embodiment, and therefore redundant description is omitted here.

  FIG. 4A is a flowchart of the resource selection method according to the second embodiment. For a handover scenario, as shown in FIG. 4A, the method includes the following steps:

Step 401: The source base station notifies the user equipment (UE) of the time-frequency position of the mode 2 resource pool configured by the source base station, and the user equipment is in the mode 1 resource. That you can use
In this embodiment, the source base station can inform the user equipment of the time frequency location of the mode 2 resource pool by broadcast or dedicated signaling, and / or the source base station can broadcast or dedicated Signaling may inform the user equipment that the user equipment may request use of mode 1 resources Step 402: The user equipment reports measurement results;
In the present embodiment, the user apparatus measures channel quality, for example, Reference Signal Receiving Power (RSRP) and Reference Signal Receiving Quality (RSRQ), and the measurement result described above. To the source base station.

Step 403: The source base station sends a handover request to the target base station based on the measurement result;
In the present embodiment, the handover request may include information that the user apparatus is performing D2D communication and / or an allocation mode and resource position of a D2D communication resource used by the user apparatus.

Step 404: The target base station transmits configuration information to the source base station after receiving the handover request;
In this example, the configuration information includes the time frequency position of the resource pool configured by the target base station according to mode 2, and / or information indicating whether the target base station supports the mode 1 resource allocation scheme, and Alternatively, the resource position of the resource allocated by the target base station according to mode 1 may be included.

Step 405: The source base station reconfigures the user equipment after receiving the configuration information of the target base station;
In the present embodiment, the source base station configures the configuration information for the user equipment, and the configuration scheme is the configuration scheme by any conventional scheme, for example, higher layer signaling or other signaling. A method of notifying the user device may be employed.

Step 406: Establishing a connection with the target base station, and in the second period from when the user equipment receives the configuration information to reception of resources allocated according to mode 1 by the target base station, The user equipment selects a resource for performing D2D communication from a resource pool configured according to mode 2 by the source base station or the target base station;
In the present embodiment, when the configuration information is configured by an RRC connection reconfiguration message, when the user equipment receives the RRC connection reconfiguration message including the Mobility Control Info IE, the user equipment starts counting the time of the T304 timer, The connection with the base station is disconnected, and the connection with the target base station is established by random access. Thereafter, the timing of the T304 timer is stopped.

  Step 407: The user equipment transmits a resource request to the target base station.

  Step 408: The target base station allocates a first resource for the user equipment.

  Step 409: The target base station notifies the allocated resource to the user apparatus, and the user apparatus has successfully received the first resource allocated by the target cell.

  In the present embodiment, during the time period (within the time period T2) from the T304 timer activation to the successful reception of the mode 1 resource allocated by the target cell, the user apparatus performs D2D from the mode 2 resource pool. Select resources for communication and do not use mode 1 resources. Among them, the specific setting method related to T304 can be referred to the conventional standard, so the explanation here is omitted. .

  In one implementation, the user equipment may further install a first timer, and in step 406, the user equipment starts a T304 timer when receiving a RRC connection reconfiguration message including a Mobility Control Info IE. At the same time, the first timer (T1 ′) may be started, and after the first timer expires, until the mode 1 resource allocated by the target cell is successfully received (time period T2 '), The user equipment selects a resource from the mode 2 resource pool for D2D communication and does not use the mode 1 resource, of which T1' is smaller than T304. As can be seen, when the time required for the user device to handover to the target device is relatively short, the user device may not consider the resources used in the T '.

  In this embodiment, the user equipment may use a mode 2 resource pool configured by the source base station or the target base station; or the user equipment may use mode 2 configured by the target base station. After receiving the resource pool, select a resource for D2D communication from the resource pool configured by the target base station, and the user apparatus receives the mode 2 resource pool configured by the target base station Before, a resource for performing D2D communication is selected from the resource pool of mode 2 configured by the source base station.

As shown in FIG. 4A, the method may further include the following steps:
Step 410: After successfully receiving the mode 1 resource allocated by the target base station, the user equipment stops the resource for performing D2D communication selected from the mode 2 resource pool.

  Step 411: The user apparatus releases the mode 2 resource pool after receiving the mode 1 resource allocated by the target base station.

  Among them, after receiving the mode 1 resource allocated by the target base station, the user apparatus configures the mode 1 resource for the MAC layer and simultaneously releases the mode 2 resource pool.

  In another embodiment, as shown in FIG. 4B, within the time period T2, T2 ′ described above, after step 406, the user equipment transmits the target base station transmitted by the target base station. Upon receiving the instruction information for instructing to use the resource (see step 406 ′), the user equipment stops using the mode 2 resource and releases the mode 2 resource pool (step 410 ′ and Then, request the mode 1 resource from the target cell (see step 407).

  In the above-described embodiment, the execution order of steps 410 and 411 and steps 410 'and 411' may be exchanged or may be performed simultaneously.

  As can be seen from the above-described resource selection method in the present embodiment, the user apparatus receives the reconfiguration information transmitted by the source base station and then receives the mode 1 resource allocated by the target cell at the time of handover. Before, a resource can be selected for D2D communication from the mode 2 resource pool, thereby ensuring continuity of D2D communication.

  Embodiment 3 of the present invention provides a resource selection method, which corresponds to a scenario where the user equipment performs re-establishment after failure. In the present embodiment, failures that trigger the re-establishment initialization process are mainly radio link failure (RLF), handover failure, base station reconfiguration failure, lower layer integrity check failure, and the like.

  In the present embodiment, the implementation method of the resource pool configured in accordance with the first resource allocated in accordance with the first mode and the second mode is the same as that in the first embodiment, and therefore redundant description is omitted here. In the present embodiment, the second base station may be the first base station or another base station.

  FIG. 5A is a flowchart of the resource selection method according to the third embodiment. As shown in FIG. 5A, the method includes the following steps.

Step 501: The first base station notifies the user apparatus (UE) of the time frequency position of the resource pool of mode 2 configured by the first base station, and the user apparatus Also notify that one resource can be used;
In the present embodiment, similar to step 401, the first base station can notify the user equipment of the time frequency position of the mode 2 resource pool by broadcast or dedicated signaling, and / or The first base station can inform the user equipment that the user equipment can request the use of mode 1 resources by broadcast or dedicated signaling.

Steps 503 to 505: Trigger a re-establishment initialization process after a failure has occurred in the user equipment, select one appropriate cell, and then send an RRC connection re-establish request;
In the present embodiment, when the re-establishment initialization process is triggered and the timer T311 starts to be timed, the timer T311 stops when an appropriate cell, for example, the cell of the second base station can be selected.

Step 506: The user equipment receives an RRC connection re-establishment success or failure message returned by the second base station;
In this embodiment, when the user apparatus in existence transmits the RRC connection re-establishment request to the second base station, the user apparatus can start the timer T301, and the RRC fed back by the second base station. The timer T301 stops when a connection re-establishment success / failure message is received;
When receiving a connection reestablishment success message, the user equipment establishes a connection with the second base station, and when receiving a connection reestablishment failure message, the user equipment reestablishment fails. The user apparatus can establish a connection with the second base station by executing Step 505 again and transmitting a connection establishment request.

Step 507: The user equipment has successfully established an RRC connection with the second base station;
In this embodiment, the RRC connection establishment process is the same as that in the prior art, and will be briefly described here. First, cell selection is performed; the user equipment transmits an RRC connection request to the selected second base station; and the second base station receives the RRC connection request and then sends the RRC connection request to the user equipment. An RRC connection establishment message is returned; after receiving the RRC connection establishment message, the user equipment transmits an RRC connection establishment completion message to the second base station; thus, the user equipment and the second equipment A connection with the base station can be established successfully.

  In the embodiment described above, the cell selected in the re-establishment initialization process in step 503 may be the same as or different from the cell selected in step 507, i.e., the second base station It may be the same or different. Steps 508 to 512 are the same as steps 407 to 411 shown in FIG. 4A of the second embodiment, and thus detailed description thereof is omitted here.

In this example, for a radio link failure scenario, the method further includes the following steps:
Step 502: Receive physical layer synchronization loss indication information;
Among them, after receiving the physical layer synchronization loss instruction information, the timer T310 can start timing, and after receiving the physical layer walk instruction information, after the handover process is triggered, After the establishment initialization process starts, the timer T310 stops.

In the above embodiment, for the radio link failure, in the time period (time period T1) from when T310 is activated until the user equipment successfully receives the allocated mode 1 resource after successful re-establishment. The user apparatus selects a resource for performing D2D communication from the mode 2 resource pool, and does not use the mode 1 resource;
The handover failure scenario is the same as in the second embodiment, that is, when the user apparatus receives the configuration information configured by the first base station, the timer T304 starts and the user apparatus Handed over to station and handover failed. After the handover failure, the user apparatus establishes a connection with the second base station by a re-establishment initialization process and a re-establishment connection process (for example, steps 503 to 507 shown in FIG. 5). In this way, the time period from when T304 is activated until the user equipment successfully receives the mode 1 resource allocated by the base station (eg, the second base station) of the cell that has re-established the connection. In (time period T2), the user apparatus selects a resource for performing D2D communication from the mode 2 resource pool, and does not use the mode 1 resource;
Step 503: Time period from triggering re-establishment initialization and starting timer T311 timing until user equipment successfully receives mode 1 resources allocated by the cell that re-established the connection In (time period T3), the user apparatus selects a resource for performing D2D communication from the mode 2 resource pool, and does not use the mode 1 resource;
In step 505, in the time period (time period T4) from the start of RRC connection re-establishment request transmission until the user equipment successfully receives the mode 1 resource allocated by the cell that re-established the connection. The device selects a resource for D2D communication from the mode 2 resource pool and does not use the mode 1 resource.

  For base station reconfiguration failure, upon failure due to a failure such as a lower layer integrity check, the user equipment starts the re-establishment initialization process, and after the timer T311 is started, the user equipment re-establishes the connection. In the time period (time period T3) until the mode 1 resource allocated successfully by the cell is successfully received, the user apparatus selects a resource for performing D2D communication from the mode 2 resource pool, Do not use mode 1 resources.

  In the present embodiment, the user apparatus may further install a second timer (T2 ″), start the second timer when starting re-establishment initialization, and the second timer In the time period (time period T3 ′) from when the user equipment has successfully received the mode 1 resource allocated by the cell that reestablished the connection, the user equipment A resource is selected from the pool for D2D communication, and mode 1 resources are not used, of which T2 '' is smaller than T311.

  In the present embodiment, since a conventional standard can be referred to for the implementation method of the above-described timers T310, T304, T311, and T301, detailed description thereof is omitted here.

  In another embodiment, as shown in FIG. 5B, during the time period T1, T2, T3, T3 ′ and T4 described above, the user equipment is transmitted by the target base station and the user equipment is in mode. When receiving the instruction information for instructing to use the resource of 1 (see step 507 ′), the user apparatus stops using the resource of mode 2 and releases the resource pool of mode 2 (step 511 ′ and step 512 ′), and requests the target cell for mode 1 resources (see step 508). In the embodiment described above, the order of execution of steps 511 and 512 and steps 511 'and 512' may be changed, or may be executed simultaneously.

  In Steps 407 and 508 of Embodiment 2 and Embodiment 3, before the user equipment transmits a resource request to the target base station, the method further includes the mode 1 resource in the received configuration information. If the configuration information does not include mode 1 resources, the user equipment performs steps 407 and 508, that is, transmits a request for mode 1 resources to the target base station. To do.

  In the above-described embodiment, the user apparatus uses a mode 2 resource pool configured by a base station where a failure has occurred (first base station) or a base station whose connection has been reestablished (second base station). Or after the user equipment receives the mode 2 resource pool configured by the base station to which the connection has been reestablished, in the resource pool configured by the base station to which the connection has been reconfigured The resource for performing D2D communication can be selected from the base station in which the failure occurred before the user apparatus receives the mode 2 resource pool configured by the base station to which the connection has been reestablished. A resource for performing D2D communication can be selected from a mode 2 resource pool configured by a station.

  As can be seen from the above-described resource selection method in the present embodiment, the user apparatus performs communication using a resource selected from the resource pool configured according to the second mode by the first base station or the second base station in a predetermined period. As a result, the continuity of the D2D communication can be ensured by the user apparatus selecting the corresponding resource in the re-establishment scenario after the failure and performing the D2D communication.

  Embodiment 4 of the present invention further provides a resource selection device as described in Embodiment 4 below. Since the principle by which the resource selection device solves the problem is the same as the method according to the first to third embodiments, the specific implementation can refer to the implementation of the method according to the first to third embodiments. The description which is the same is abbreviate | omitted.

  FIG. 6 is a diagram illustrating the configuration of the resource selection device according to the fourth embodiment of the present invention. As shown in FIG. 6, the apparatus 600 includes the following.

  First selection unit 601: a second base station that has re-established connection with the user apparatus after the user apparatus has disconnected the first base station and has received physical layer synchronization loss instruction information after the user apparatus has disconnected from the first base station A first period until the first resource allocated according to the first mode is received, or after the user apparatus receives configuration information that triggers a handover of the user apparatus to the second base station, A second period until the first resource allocated according to the first mode by the second base station is received, or a second period in which the user apparatus has re-established the connection after initializing re-establishment The third period until the first resource allocated according to the first mode by the base station is received, or the second group that has reestablished the connection with the user apparatus after the user apparatus has transmitted the re-establishment request. A resource for communication is selected from the resource pool configured according to the second mode by the first base station or the second base station in the fourth period until the first resource allocated according to the first mode by the station is received. .

  In the present embodiment, the first base station and the second base station, and the first mode and the second mode for allocating resources are the same as in the first to third embodiments, and thus detailed description thereof is omitted here. The

  In this embodiment, when the failure that the user equipment triggers the re-establishment initialization process is Radio Link Failure (RLF), the user equipment receives the physical layer synchronization loss indication information and then the user equipment In the first period until the first resource allocated according to the first mode is received by the second base station that has re-established the connection with the device, the first selection unit 601 is assigned by the first base station or the second base station. A resource is selected for D2D communication from the resource pool configured according to the second mode, and the first resource allocated according to the first mode by the base station is not used.

  In this embodiment, when the user apparatus performs a handover or when the failure that triggers the re-establishment initialization process of the user apparatus is a handover failure, the user apparatus hands to the second base station of the user apparatus. In the second period from the reception of the reconfiguration information that triggers over to the reception of the first resource allocated according to the first mode by the second base station, the first selection unit 601 Alternatively, a resource is selected for D2D communication from a resource pool configured according to the second mode by the second base station, and the first resource allocated according to the first mode by the base station is not used.

  In this embodiment, when the failure that the user equipment triggers the re-establishment initialization process is base station reconfiguration failure, lower layer integrity check failure, handover failure, etc., the user equipment initializes re-establishment, In the third period until the first resource allocated according to the first mode is received by the second base station that has re-established the connection with the user apparatus, the first selection unit 601 includes the first base station or the second base station A resource is selected for D2D communication from a resource pool configured according to the second mode by the station, and the first resource allocated according to the first mode by the base station is not used.

  In this embodiment, when the failure that triggers the re-establishment initialization process is a handover failure, the user device transmits a re-establishment request and then re-establishes the connection with the user device. In the fourth period until the first resource allocated according to the first mode by the base station is received, the first selection unit 601 is in the resource pool configured according to the second mode by the first base station or the second base station. To select a resource for D2D communication and do not use the first resource allocated according to the first mode by the base station.

  As can be seen from the above-described resource selection apparatus in the present embodiment, the user apparatus performs the second mode by the first base station or the second base station in the first period, the second period, the third period, or the fourth period. Communication can be performed using the resource selected from the configured resource pool, which allows the user equipment to perform D2D communication by selecting the corresponding resource in a scenario such as handover or re-establishment after failure. Therefore, continuity of D2D communication can be guaranteed.

  In the present embodiment, after the user apparatus receives the resource pool configured according to the second mode by the second base station, the first selection unit 601 selects D2D from the resource pool configured by the second base station. Before selecting a resource for communication and receiving the resource pool configured according to the second mode by the second base station by the user apparatus, the first selection unit 601 determines that the first base station Select a resource for D2D communication from the resource pool configured according to the mode.

  In one implementation, when the user equipment performs an inter-cell handover, the first selection unit 601 may select a resource in the mode 2 resource pool configured by the source base station or the target base station; or After the user apparatus receives the mode 2 resource pool configured by the target base station, the first selection unit 601 selects a resource for performing D2D communication from the resource pool configured by the target base station. Before the user apparatus receives the mode 2 resource pool configured by the target base station, the first selection unit 601 performs D2D communication from the mode 2 resource pool configured by the source base station. Select a resource.

  In one implementation, when the user equipment performs re-establishment after failure, the first selection unit 601 uses the resources in the mode 2 resource pool configured by the failed base station or the re-established base station. Or, after the user equipment receives the mode 2 resource pool configured by the re-established base station, the first selection unit 601 may be in the resource pool configured by the re-established base station. The first selection unit 601 selects the resource for performing D2D communication from the base station and receives the mode 2 resource pool configured by the re-established base station. Select a resource for D2D communication from the mode 2 resource pool configured by the station.

In this embodiment, the apparatus 600 further includes the following:
First release unit 602: The user equipment uses the first resource after receiving the first resource allocated according to the first mode by the second base station or from the second base station. When the instruction information for instructing to do so is received, the resource pool is released.

  In one implementation, when the user equipment performs inter-cell handover, the user equipment configures the mode 1 resources for the MAC layer after receiving the mode 1 resources allocated by the target base station, The release unit 602 releases mode 2 resources or receives instruction information for instructing the user equipment to use mode 1 resources, which is instruction information of the target base station. At this time, the use of the mode 2 resource is stopped, and the first release unit 602 releases the mode 2 resource and requests the mode 1 resource from the target cell at the same time.

  In one implementation, when the user equipment performs re-establishment after failure, the user equipment configures the mode 1 resources for the MAC layer after receiving the mode 1 resources allocated by the re-established base station, The first release unit 602 releases mode 2 resources, or indicates that the user equipment is the instruction information from the re-established base station, and the user equipment requests to use the mode 1 resources. When the one is received, the use of the mode 2 resource is stopped, and the first release unit 602 releases the mode 2 resource and simultaneously requests the mode 1 resource from the re-established base station.

  In the present embodiment, when the time taken for the user equipment to succeed in the handover is relatively short, the resource pool configured according to the second mode may not be used in the relatively short handover process. The apparatus 600 further includes the following.

First setting unit 603: sets a first predetermined time, which is the time from when the user apparatus receives the reconfiguration information until it is successfully connected to the second base station Smaller;
If the user equipment cannot successfully hand over to the second base station within the first predetermined time after receiving the reconfiguration information, the second period exceeds the first predetermined time. , Including a period until the first resource is received.

  In the present embodiment, when the time occupied by the re-establishment process of the user device is relatively short, the resource pool configured according to the second mode may not be used in the relatively short re-establishment process. The apparatus 600 further includes the following.

Second setting unit 604: sets a second predetermined time, which is smaller than the time from the start of re-establishment initialization until an appropriate cell can be selected;
If the user equipment is unable to select an appropriate cell within the second predetermined time after re-establishing re-establishment, the third period exceeds the second predetermined time before receiving the first resource Including the period up to.

In this embodiment, the apparatus may further include the following:
Receiving unit 605: receiving configuration information reconfigured by the first base station;
Among them, the configuration information includes information indicating a time frequency position of a resource pool configured by the second base station according to the second mode, and / or whether the second base station supports the first mode resource allocation method, and / Or includes the resource location of the resource allocated by the second base station according to the first mode.

  In the present embodiment, the first release unit 602, the first setting unit 603, the second setting unit 604, and the receiving unit 605 are selectable units.

  In the present embodiment, the first period, the second period, the third period, and the fourth period are the same as those in the first to third embodiments, so the contents thereof are cited here, and the detailed description thereof is omitted here. .

  As can be seen from the above-described resource selection apparatus in the present embodiment, the user apparatus performs communication using the resource selected from the resource pool configured according to the second mode by the first base station or the second base station in a predetermined period. In this way, the user apparatus selects the corresponding resource in a scenario such as handover or re-establishment after failure to perform D2D communication, thereby ensuring continuity of D2D communication.

  An embodiment of the present invention provides a user apparatus, and the user apparatus includes the resource selection apparatus described in the fourth embodiment.

  FIG. 7 is a diagram showing a system configuration of the user apparatus 700 in the embodiment of the present invention. As shown in FIG. 7, the user device 700 may include a central processing unit 701 and a storage unit 740, and the storage unit 740 is coupled to the central processing unit 701. In addition, this figure is only an illustration, and it can also implement | achieve a telecommunication function or another function by performing supplementation or substitution to this structure using another type of structure.

  In one implementation, the function of the resource selection device can be integrated into the central processing unit 701. Among them, the central processing unit 701 may be configured as follows.

  Among them, the central processing unit 701 may be configured as follows, that is, after the user apparatus receives the physical layer synchronization loss instruction information after the connection with the first base station is disconnected, The first period until the first resource allocated according to the first mode is received by the second base station that has re-established the connection with the user apparatus, or the hand of the user apparatus to the second base station The second period from the reception of the configuration information that triggers over to the reception of the first resource allocated in accordance with the first mode by the second base station, or after the user device initializes re-establishment A third period until the first resource allocated according to the first mode is received by the second base station that reestablished the connection with the user apparatus, or after the user apparatus transmits a re-establishment request, The Configured in accordance with the second mode by the first base station or the second base station in the fourth period until receiving the first resource allocated according to the first mode by the second base station re-established with the device. Select a resource for D2D communication from the selected resource pool.

  Among them, the first resource allocated according to the first mode by the base station and the resource pool configured according to the second mode are the same as those in the first to fourth embodiments. The description is omitted.

  In one implementation, the central processing unit 701 may be configured as follows: after the user device receives a resource pool configured according to the second mode by the second base station, the second processing unit 701 Selecting a resource for communication from a resource pool configured by a base station; before the user equipment receives the resource pool configured according to a second mode by the second base station, the first base station A communication resource is selected from a resource pool configured according to the second mode.

  In one implementation, the central processing unit 701 may be configured as follows: after the user equipment receives the first resource allocated according to the first mode by the second base station, or When the instruction information for instructing the user apparatus to use the first resource is received from the second base station, the resource pool is released.

In one implementation, the central processing unit 701 may be configured as follows, i.e., handover to the second base station within a first predetermined time after the user equipment receives the configuration information. If not, the second period includes a period from when the first predetermined time is exceeded until the first resource is received;
The first predetermined time is smaller than the time from when the user apparatus receives the configuration information until it is successfully connected to the second base station.

In one implementation, the central processing unit 701 may be configured as follows: if the user equipment cannot select an appropriate cell within a second predetermined time after initializing re-establishment, A third period includes a period from when the second predetermined time is exceeded until the first resource is received;
The second predetermined time is shorter than the time from the start of re-establishment initialization until an appropriate cell can be selected.

  In another implementation, the resource selection device may be configured independently of the central processing unit 701. For example, the resource selection device may be configured as a chip connected to the central processing unit 701 (eg, As in the resource selection unit 750, the function of the resource selection device can be realized by the control of the central processing unit.

  As shown in FIG. 7, the user device 700 may further include a communication module 710, an input unit 720, an audio processing unit 730, a display device 760, and a power source 770. Note that the user device 700 does not necessarily include all the components illustrated in FIG. Further, the user apparatus 700 may further include parts not shown in FIG. 7, and the prior art can be referred to for this.

  As shown in FIG. 7, the central processing unit 701 may be referred to as a controller or operational controller and may include a microprocessor or other processor unit and / or logic unit, the central processing unit 701 being , Receiving input and controlling the operation of each component of the user device 700.

  Among them, the storage device 740 may be a plurality of, for example, one of a buffer, a fresh memory, an HDD, a movable medium, a volatile storage device, a non-volatile storage device, or other appropriate devices. Information regarding the above-described failure can be stored, and a program for information processing can also be stored. Further, the central processing unit 701 can execute the program stored in the storage device 740 in order to realize storage of configuration information and reconfiguration information. Since the functions of the other parts are the same as the conventional ones, detailed description thereof is omitted here. Note that each component of the user device 700 can also be realized by dedicated hardware, firmware, software, or a combination thereof, all of which belong to the scope of the present invention.

  As can be seen from the above-described user apparatus in the present embodiment, the user apparatus performs communication using a resource selected from the resource pool configured according to the second mode by the first base station or the second base station in a predetermined period. Accordingly, the user apparatus selects the corresponding resource in a scenario such as handover or re-establishment after failure and performs D2D communication, thereby ensuring continuity of D2D communication.

  Embodiment 6 of the present invention further provides a resource selection device. FIG. 8 is a diagram illustrating the configuration of the resource selection device according to the present embodiment. As shown in FIG. 8, the resource selection device 800 includes the following.

First transmission unit 801: based on the measurement result transmitted by the user apparatus, transmits a handover request to the second base station, the handover request includes information that the user apparatus is performing D2D communication, and / or Including the allocation mode and resource location of D2D communication resources used by the user equipment;
First receiving unit 802: receiving configuration information returned by the second base station based on the handover request, the configuration information including a time frequency position of a resource pool configured by the second base station according to the second mode, And / or information indicating whether the second base station supports the resource allocation scheme of the first mode, and / or resource location of resources allocated by the second base station according to the first mode;
First configuration unit 803: Reconfigure the configuration information for the user device.

  By reconfiguring the configuration information for the user device by the resource selection device in the present embodiment, the user device is in a resource pool configured according to the second mode by the first base station or the second base station in a predetermined period. Communication can be performed using the resource selected from the above. Thereby, the continuity of D2D communication can be ensured by the user apparatus selecting the corresponding resource in a scenario such as handover or re-establishment after failure and performing D2D communication.

  Embodiment 7 of the present invention provides a base station, and the base station includes the resource selection apparatus described in Embodiment 6.

  FIG. 9 is a block diagram of the base station in the embodiment of the present invention. As shown in FIG. 9, the base station 900 may include a central processing unit (CPU) 901 and a storage unit 910, which is coupled to the central processing unit 901. Among them, the storage device 910 can store various data, can also store a program for resource selection, and can execute the program under the control of the central processing unit 901 so that the user device can It is also possible to receive the transmitted measurement results and transmit configuration information to the user apparatus.

  In one implementation, the function of the resource selection device can be integrated into the central processing unit 901. Among them, the central processing unit 901 may be configured as follows, that is, based on the measurement result transmitted by the user apparatus, transmits a handover request to the second base station, and the handover request is Including information that the user apparatus is performing D2D communication and / or the allocation mode and resource position of the D2D communication resource used by the user apparatus; configuration information returned by the second base station based on the handover request And the configuration information indicates a time-frequency position of a resource pool configured by the second base station according to the second mode and / or whether the second base station supports the resource allocation scheme of the first mode. Information and / or resource location of resources allocated according to the first mode by the second base station; and reconfiguring the configuration information to the user equipment.

Among them, the central processing unit 901 may be configured as follows:
In another implementation, the resource selection device may be configured independently of the central processing unit, for example, the resource selection device as a chip (eg, resource selection unit 940) connected to the central processing unit 901. The function of the resource selection device can be realized by the control of the central processing unit. Further, as shown in FIG. 9, the base station 900 may further include the following, that is, a transceiver 920, an antenna 930, etc., and the functions of these components are the same as in the prior art, The description here is omitted. Note that the base station 900 does not necessarily include all the components shown in FIG. In addition, the base station 900 may further include parts not shown in FIG. 9, for which reference can be made to the prior art.

  By reconfiguring the configuration information for the user apparatus by the base station in the present embodiment, the user apparatus can select from the resource pool configured according to the second mode by the first base station or the second base station in a predetermined period. Communication can be performed using the selected resource. Thereby, the continuity of D2D communication can be ensured by the user apparatus selecting the corresponding resource in a scenario such as handover or re-establishment after failure and performing D2D communication.

  Embodiment 8 of the present invention provides a base station. FIG. 10 is a block diagram of the base station in the embodiment of the present invention. As shown in FIG. 10, the base station 1000 may include a central processing unit (CPU) 1001 and a storage unit 1010, which is coupled to the central processing unit 1001. Among them, the storage device 1010 can store various data, can also store a program for resource selection, and can execute the program under the control of the central processing unit 1001, thereby allowing the source base station It is also possible to receive a handover request or the like transmitted by, and transmit configuration information or the like to the source base station.

  In one implementation, the central processing unit 1001 may be configured as follows: a handover request transmitted by the first base station is received, and the handover request is received by the user apparatus through D2D communication. And / or D2D communication resource allocation mode and resource location used by the user equipment; based on the handover request, return configuration information to the first base station, Configuration information includes the time frequency position of the resource pool configured according to the second mode by the second base station, and / or information indicating whether the second base station supports the resource allocation scheme of the first mode, and / Or includes the resource location of the resource allocated by the second base station according to the first mode.

  In one implementation, the central processing unit 1001 may be further configured as follows, that is, the user equipment is notified of the first resource allocated by the second base station according to the first mode.

  In one implementation, the central processing unit 1001 may be further configured as follows: from the second base station, the user equipment uses the first resource allocated according to the first mode. Instruction information for instructing the user to transmit the resource pool, thereby causing the user apparatus to release the resource pool.

  In another implementation, the resource selection device may be configured independently of the central processing unit. For example, the resource selection device may be configured as a chip (eg, resource selection unit 1040) connected to the central processing unit 1001. The function of the resource selection device can be realized by the control of the central processing unit. Further, as shown in FIG. 10, the base station 1000 may further include a transceiver 1020, an antenna 1030, and the like, and the functions of these components are the same as those of the conventional technology, so description thereof is omitted here. The Note that base station 1000 does not necessarily include all the components shown in FIG. Further, the base station 1000 may further include parts not shown in FIG. 10, and the conventional technology can be referred to for this.

  With the base station in the present embodiment, the user apparatus can perform communication using a resource selected from the resource pool configured according to the second mode by the first base station or the second base station in a predetermined period. Thereby, the continuity of D2D communication can be ensured by the user apparatus selecting the corresponding resource in a scenario such as handover or re-establishment after failure and performing D2D communication.

  FIG. 11 is a configuration diagram of a communication system according to the ninth embodiment of the present invention. As shown in FIG. 11, the communication system 1100 includes a user apparatus 1101, a first base station 1102, and a second base station 1103.

  Among them, after the user apparatus 1101 disconnects from the first base station 1102, after the user apparatus 1101 receives the physical layer synchronization loss instruction information, the second base station 1103 that reestablishes the connection with the user apparatus. The first period until the first resource allocated according to the first mode is received, or after the user apparatus 1101 receives the configuration information that triggers the handover of the user apparatus 1101 to the second base station 1103, The second period until the second base station 1103 receives the first resource allocated according to the first mode, or the second period after the user apparatus 1101 initializes the re-establishment and then re-establishes the connection with the user apparatus 1101 The third period until the base station 1103 receives the first resource allocated in accordance with the first mode, or the second period after the user device 1101 transmits the re-establishment request and re-establishes the connection with the user device 1101 Base station 1103 In the fourth period until the first resource allocated according to one mode is received, the user apparatus 1101 performs D2D communication from the resource pool configured by the first base station 1102 or the second base station 1103 according to the second mode. Select a resource.

  In the present embodiment, the first resource allocated according to the first mode by the base station and the resource pool configured according to the second mode are as described in the above-described embodiment, and thus description thereof is omitted.

  In this embodiment, when the failure that triggers the re-establishment initialization process is a radio link failure (RLF), the user equipment 1101 receives the physical layer synchronization loss indication information, and then the user equipment 1101 In the first period (T1) until the first resource allocated according to the first mode is received by the second base station that has reestablished the connection with the user apparatus 1101, the user apparatus 1101 Thus, a resource for performing D2D communication is selected from the resource pool configured according to the second mode, and the first resource allocated according to the first mode by the base station is not used.

  In this embodiment, when the failure to trigger the re-establishment initialization process is a handover failure, the user equipment 1101 receives the configuration information that triggers the connection of the user equipment 1101 to the second base station, and In the second period (T2) until receiving the first resource allocated according to the first mode by the second base station, the user equipment 1101 is configured according to the second mode by the first base station or the second base station. A resource for performing D2D communication is selected from the assigned resource pool, and the first resource allocated according to the first mode by the base station is not used.

  In this embodiment, when the failure to trigger the re-establishment initialization process is a base station reconfiguration failure, a lower layer integrity check failure, or a handover failure, the user device 1101 initializes the re-establishment, and then the user device In the third period (T3) until the first resource allocated according to the first mode is received by the second base station whose connection with 1101 has been reestablished, the user equipment 1101 A resource for performing D2D communication is selected from the resource pool configured according to the second mode by the base station, and the first resource allocated according to the first mode by the base station is not used.

  In this embodiment, when the failure that triggers the re-establishment initialization process is a handover failure, the second base station that re-establishes the connection with the user device 1101 after the user device 1101 transmits a re-establishment request. In the fourth period (T4) until the first resource allocated according to the first mode by the station is received, the user apparatus 1101 has a resource pool configured according to the second mode by the first base station or the second base station. A resource for performing D2D communication is selected from among them, and the first resource allocated according to the first mode by the base station is not used.

  In this embodiment, the user device 1101 receives the configuration information that triggers the connection of the user device 1101 to the second base station, then disconnects from the first base station, and performs the second access by the random access process. Establish a connection with the base station. After the user apparatus 1101 receives the configuration information that triggers the connection of the user apparatus 1101 to the second base station, the user apparatus 1101 receives the first resource allocated according to the first mode by the second base station. In two periods (T2), the user apparatus 1101 selects a resource for performing D2D communication from the resource pool configured according to the second mode by the first base station or the second base station, and the base station Do not use the primary resource allocated according to the mode.

  The user apparatus 1101 selects a resource for performing D2D communication from the resource pool configured by the second base station after receiving the resource pool configured according to the second mode by the second base station; Resources for performing D2D communication from the resource pool configured according to the second mode by the first base station before the user apparatus 1101 receives the resource pool configured according to the second mode by the second base station Select.

  In this embodiment, after the user apparatus connection 1101 receives the first resource allocated by the second base station according to the first mode or from the second base station, the user apparatus uses the first resource. When the instruction information for instructing to receive is received, the resource pool is released.

  In the present embodiment, when the user device 1101 uses a relatively short time until the handover succeeds, the resource pool configured according to the second mode may not be used in the relatively short handover process. The method may further include the following: when the user equipment 1101 cannot perform handover to the second base station within a first predetermined time after receiving the reconfiguration information, The second period includes a period from when the first predetermined time is exceeded until the first resource is received. Among the period, the first predetermined time is when the user apparatus 1101 receives the configuration information. From the time until it is successfully connected to the second base station.

  In this embodiment, when the user apparatus 1101 uses a relatively short time in the re-establishment process, the resource pool configured according to the second mode may not be used in the relatively short re-establishment process. May further include the following: if the user equipment 1101 performs re-establishment initialization and cannot select an appropriate cell within a second predetermined time, the third period It includes a period from when the second predetermined time is exceeded until the first resource is received, and the second predetermined time is smaller than the time from the start of re-establishment initialization until an appropriate cell can be selected. .

  In the present embodiment, since the configuration of the user device 1101 can refer to the fifth embodiment, the contents are merged here and the description here is omitted.

  In this embodiment, the first base station 1102 further transmits a handover request to the second base station 1103 based on the measurement result transmitted by the user apparatus, and the user apparatus performs D2D communication. Information and / or allocation mode and resource position of the D2D communication resource used by the user apparatus; receiving configuration information returned from the second base station 1103 based on the handover request; The information includes information indicating a time frequency position of a resource pool configured according to the second mode by the second base station 1103, and / or whether the second base station supports the resource allocation scheme of the first mode, and / or , Including the resource location of resources allocated by the second base station 1103 according to the first mode.

  In the present embodiment, the first base station 1102 further configures configuration information for the user equipment 1101.

  In the present embodiment, since the configuration of the base station 1102 can refer to the seventh embodiment, the contents are merged here, and the description here is omitted.

  In the present embodiment, the second base station 1103 further receives the handover request transmitted by the first base station 1102, and the handover request includes information indicating that the user apparatus 1101 is performing D2D communication, and / or Or a D2D communication resource allocation mode and resource location used by the user equipment 1101; based on the handover request, configuration information is returned to the first base station 1102, and the configuration information is The time frequency position of the resource pool configured by the base station 1103 according to the second mode and / or information indicating whether the second base station 1103 supports the resource allocation scheme of the first mode, and / or the second The resource position of the resource allocated by the base station 1103 based on the first mode is included.

  In the present embodiment, the second base station 1103 further notifies the user apparatus 1101 of the first resource allocated according to the first mode.

  In the present embodiment, the second base station 1103 further transmits instruction information for instructing the user apparatus 1101 to use the first resource allocated in accordance with the first mode, whereby the user apparatus 1101 Let 1101 release the resource pool.

  In the present embodiment, since the configuration of the second base station 1103 can refer to the eighth embodiment, the contents are merged here, and the description thereof is omitted here.

  In the present embodiment, the communication system may further include another user apparatus (not shown), and the user apparatus 1101 uses the resource of mode 2 within the above-described predetermined time to communicate with the other user apparatus. D2D communication can be performed.

  Embodiments of the present invention further provide a computer readable program, of which when executing the program in a resource selection device or a user device, the program is stored in the computer or in the device or user device. Alternatively, the resource selection method described in 2 or 3 is executed.

  The embodiment of the present invention further provides a storage medium storing a computer-readable program, wherein the computer-readable program is stored in the resource selection device or the user device in the computer according to the first, second, or third embodiment. Run the resource selection method.

  The above-described apparatus and method of the present invention may be realized by hardware, or may be realized by a combination of hardware and software. The present invention further relates to a computer-readable program such as the following: when the program is executed by a logic component, the logic component realizes the above-described apparatus or component, or the logic Allow the component to implement the various methods or steps described above. The present invention further relates to a storage medium storing the above-described program, for example, a hard disk, a magnetic disk, an optical hard disk, a DVD, a flash memory, or the like.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to such embodiments, and all modifications to the present invention are within the technical scope of the present invention without departing from the spirit of the present invention. Belongs.

Claims (10)

A communication system including a first base station, a second base station, and a user equipment,
The first base station is
A first transmitter that transmits a first signal including information related to D2D communication of the terminal device to the second base station;
A first receiver for receiving a second signal including configuration information from the second base station;
A second transmitter that transmits an RRC message to the user apparatus after receiving the second signal;
The second base station is
A second receiver for receiving the first signal from the first base station;
A thirty-second transmitter for transmitting the second signal to the twelfth base station;
A third receiver for receiving a third signal related to a wireless connection from the user device,
The user equipment is
A receiving unit for receiving the RRC message from the first base station;
A transmitter for transmitting the 43rd signal to the second base station,
The configuration information is information on a resource pool configured according to the second mode by the second base station, or information indicating whether the second base station supports the resource allocation scheme of the first mode, or A communication system comprising: information including at least one of information including resource positions of resources allocated according to the first mode by the second base station. A first transmission unit that transmits a first signal including information related to D2D communication of the user apparatus to another base station;
A first receiver that receives a second signal including configuration information from the other base station;
A second transmitter that transmits an RRC message to the user apparatus after receiving the second signal;
The configuration information is information on a resource pool configured according to the second mode by the second base station, or information indicating whether the second base station supports the resource allocation scheme of the first mode, or A base station characterized in that the base station is information including at least one of information including resource positions of resources allocated according to the first mode by the second base station. A second receiver for receiving measurement information from the user device;
The base station according to claim 2, wherein the first transmission unit transmits the first signal to another base station after receiving the measurement information.   The information regarding the D2D communication includes whether or not the user apparatus is capable of performing D2D communication, an allocation mode of a D2D communication resource used by the user apparatus, and position information of the D2D communication resource used by the user apparatus The base station according to claim 2, comprising at least one of the following.   The base station according to any one of claims 2 to 4, wherein the first signal is a handover request. A first receiving unit that receives a first signal including information related to D2D communication of the user apparatus from another base station;
A transmission unit for transmitting a second signal including configuration information to the other base station;
A second receiving unit that receives a third signal related to wireless connection from the user device,
The configuration information includes information on a resource pool configured according to the second mode, information indicating whether the resource allocation method of the first mode is supported, or the resource position of the resource allocated according to the first mode. A base station characterized by being information including at least one of information.   The information regarding the D2D communication includes whether or not the user apparatus is capable of performing D2D communication, an allocation mode of a D2D communication resource used by the user apparatus, and position information of the D2D communication resource used by the user apparatus The base station according to claim 6, comprising at least one of the following.   The base station according to claim 6 or 7, wherein the first signal is a handover request. The user apparatus in a communication system including a first base station, a second base station, and a user apparatus,
A receiving unit that receives an RRC message to be transmitted after the first base station receives a first signal including configuration information from the second base station;
A transmitter that transmits a second signal related to wireless connection to the second base station,
The configuration information is information on a resource pool configured according to the second mode by the second base station, or information indicating whether the second base station supports the resource allocation scheme of the first mode, or A user apparatus comprising: information including at least one of information including resource positions of resources allocated by the second base station according to a first mode. The transmitter transmits measurement information to the first base station;
The reception unit according to claim 7, wherein the reception unit receives an RRC message including Mobility Control Info after the first base station selects the second base station according to the measurement information. base station.

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