Electronic device and wireless communication method

Abstract

The disclosure relates to an electronic device and a wireless communication method. The electronic device includes circuitry configured to determine a proximity service direct communication requirement of a user equipment, select a carrier to be used for proximity service direct communication from among a predetermined set of carriers based on a capability of the user equipment, and perform proximity service direct communication carrier aggregation transmission using the selected carrier, wherein the circuitry is configured to select a carrier that is used with a low frequency from among the predetermined set of carriers for the proximity service direct communication.

Description

[0001] This application was filed on July 20, 2015, with application number 201510427403.9.

[0002] A divisional application of the invention patent application entitled "Electronic device for wireless communication and wireless communication method". Technical Field

[0003] This disclosure generally relates to the field of wireless communications, and more specifically, to electronic devices for wireless communications and methods for wireless communications. Background Technology

[0004] In the 3GPP (3rd Generation Partnership Project) standard, proximity-based service (ProSe) direct communication refers to a mode in which user equipment (UE) can communicate directly with each other. ProSe direct communication can include, for example, device-to-device (D2D) communication and vehicle-to-entity (V2X) communication, which can include, for example, vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), and vehicle-to-pedestrian (V2P) communication. Figure 14 As shown in the diagram, the link between UE1 and UE2 that conducts direct communication for proximity services is called a sidelink. UE1 and UE2 are linked through the PC5 interface, and UE1 and UE2 are linked to the base station via the Uu interface.

[0005] Furthermore, according to existing standards, in the case of Radio Resource Control (RRC) connections, the evolved NodeB (eNB) typically schedules the UE to perform ProSe direct communication on resources that are the same as the eNB's primary cellular communication frequency. Additionally, UEs connected to other cells via RRC can also perform ProSe direct communication based on their detected wireless communication resources, such as resource pools broadcast on public safety ProSe carriers. Summary of the Invention

[0006] A brief overview of embodiments of the invention is provided below to provide a basic understanding of certain aspects of the invention. It should be understood that this overview is not an exhaustive summary of the invention. It is not intended to identify key or essential parts of the invention, nor is it intended to limit the scope of the invention. Its purpose is merely to present certain concepts in a simplified form as a prelude to the more detailed description that follows.

[0007] According to one embodiment, an electronic device for wireless communication is provided, comprising one or more processors. The processors are configured to determine the current carrier aggregation state of a first user equipment (User Equipment) in response to a proximity-serving direct communication (PSC) request from the User Equipment. The processors are also configured to determine a radio resource configuration for the User Equipment based on the PSC, wherein the radio resource configuration is used for PSC.

[0008] According to another embodiment, a wireless communication method is provided. The method includes determining a current carrier aggregation state of a first user equipment (User Equipment) in response to a proximity-serving direct communication (PSC) requirement of the User Equipment. The method further includes determining a radio resource configuration for the User Equipment based on the PSC's carrier aggregation state, wherein the radio resource configuration is used for PSC.

[0009] Embodiments of the present invention provide a scheme for scheduling radio resource configurations for ProSe direct communication based on the carrier aggregation state of the UE. Compared with existing methods, the scheme of the present invention is beneficial to shorten the measurement time and communication overhead of the UE for the radio resource configuration. Attached Figure Description

[0010] The present invention can be better understood by referring to the description given below in conjunction with the accompanying drawings, in which the same or similar reference numerals are used throughout the drawings to denote the same or similar parts. These drawings, together with the following detailed description, are incorporated in and form part of this specification, and are used to further illustrate preferred embodiments of the invention and explain the principles and advantages of the invention. In the drawings:

[0011] Figure 1 This is a block diagram illustrating a configuration example of an electronic device for wireless communication according to an embodiment of the present invention;

[0012] Figure 2 This is a block diagram illustrating an example configuration of a second determining unit in an electronic device for wireless communication according to one embodiment;

[0013] Figure 3 This is a block diagram illustrating a configuration example of an electronic device for wireless communication according to another embodiment;

[0014] Figure 4 This is a block diagram illustrating a configuration example of an electronic device for wireless communication according to another embodiment;

[0015] Figure 5 This is a block diagram illustrating a configuration example of an electronic device for wireless communication according to another embodiment;

[0016] Figure 6 This is a block diagram illustrating a configuration example of an electronic device for wireless communication according to another embodiment;

[0017] Figure 7 This is a block diagram illustrating a configuration example of an electronic device for wireless communication according to another embodiment;

[0018] Figure 8 This is a flowchart illustrating a process example of a wireless communication method according to an embodiment of the present invention;

[0019] Figure 9 This is a signaling flowchart illustrating an example of a radio resource configuration process according to an embodiment of the present invention;

[0020] Figure 10 This is a signaling flowchart illustrating an example of a radio resource configuration process according to an embodiment of the present invention;

[0021] Figure 11 This is a signaling flowchart illustrating an example of a radio resource configuration process according to an embodiment of the present invention;

[0022] Figure 12 This is a signaling flowchart illustrating an example of a radio resource configuration process according to an embodiment of the present invention;

[0023] Figure 13 This is a schematic diagram illustrating an example method of radio resource configuration according to an embodiment of the present invention;

[0024] Figure 14 This is a diagram illustrating direct communication between neighboring services;

[0025] Figure 15 This is a block diagram illustrating an exemplary structure of a computer that implements the methods and apparatus of this disclosure;

[0026] Figure 16 This is a block diagram illustrating an example of a schematic configuration of a smartphone to which the technologies of this disclosure can be applied;

[0027] Figure 17 This is a block diagram illustrating an example of a schematic configuration of an eNB (evolved base station) to which the technologies of this disclosure can be applied; and

[0028] Figure 18 This is a block diagram illustrating a configuration example of an electronic device for wireless communication according to an embodiment of the present invention. Detailed Implementation

[0029] Embodiments of the present invention will now be described with reference to the accompanying drawings. Elements and features described in one drawing or embodiment of the invention may be combined with elements and features shown in one or more other drawings or embodiments. It should be noted that, for clarity, representations and descriptions of components and processes unrelated to the present invention and known to those skilled in the art have been omitted from the drawings and description.

[0030] like Figure 1 As shown, the electronic device 100 for wireless communication according to this embodiment includes a processor 110. As will be described below with reference to specific embodiments, the electronic device 100 can operate as a base station or a user equipment.

[0031] Furthermore, it should be noted that although the first determining unit 111 and the second determining unit 113 in the processor 110 are shown in separate dashed boxes in the accompanying drawings, it should be understood that the functions of the first determining unit 111 and the second determining unit 113 can also be implemented by the processor 110 as a whole, and not necessarily by separate actual components within the processor 110. Additionally, although the processor 110 is shown in a single box in the figure, the communication device 100 may include multiple processors, and the functions of the first determining unit 111 and the second determining unit 113 can be distributed among multiple processors, allowing multiple processors to collaboratively perform these functions.

[0032] The first determining unit 111 is configured to determine the current carrier aggregation state of the first user equipment in response to a direct communication request for a neighboring service of the first user equipment.

[0033] When user equipment (UE) communicates with a base station via carrier aggregation, for example in downlink carrier aggregation, the base station can transmit primary control signaling to the UE through the primary component carrier (PCC) corresponding to the primary cell (Pcell), including resource scheduling instructions for the secondary component carrier (SCC) corresponding to the secondary cell (Scell). This enables cross-carrier scheduling. On the other hand, in uplink carrier aggregation, UE typically only sends uplink control information to the base station through the primary cell. Current standardization discussions do not address the specific operating methods when carrier aggregation and proximity service direct communication are combined. UE typically communicates with the base station and other UEs on the same carrier using time-division multiplexing; however, this method is clearly inefficient. This invention aims to provide some solutions.

[0034] As previously described, electronic device 100 can function as a base station or a user equipment. For example, when electronic device 100 functions as a base station, if a first user equipment connected to the base station via RRC needs to perform direct communication for proximity services, the first user equipment can send corresponding indication information to the base station, and the base station, in response to this indication information, determines the current carrier aggregation state of the first user equipment, for example, based on information stored by the base station. Furthermore, if electronic device 100 is the first user equipment itself, it can directly learn about the proximity service direct communication needs and the current carrier aggregation state.

[0035] The second determining unit 113 is configured to determine the radio resource configuration of the first user equipment based on the carrier aggregation state of the first user equipment. The radio resource configuration is used for direct communication of neighboring services of the first user equipment.

[0036] According to one embodiment, the second determining unit 113 can be configured to determine, based on the determined carrier aggregation state and the device capabilities of the first user equipment, whether to reconfigure the current carrier aggregation to enable direct communication for neighboring services, wherein the carrier aggregation state may include the number of aggregated component carriers (CCs). For example, the device capabilities of the first user equipment may include uplink multi-carrier support capabilities, such as uplink aggregation capabilities (e.g., whether uplink carrier aggregation is supported, and the upper limit of the number of uplink carriers that can be aggregated), and correspondingly, the carrier aggregation state may include the current number of uplink component carriers.

[0037] Additionally, reconfiguring the current carrier aggregation may include releasing at least one aggregated component carrier, or reconfiguring may include configuring one of the aggregated component carriers for direct communication with neighboring services.

[0038] More specifically, the second determining unit 113 may be configured, for example, to release at least one aggregated component carrier and configure one of the component carriers for direct communication in proximity services when the number of aggregated component carriers reaches a predetermined threshold. This predetermined threshold is determined, for example, based on the device capabilities of the user equipment, such as an upper limit on the number of carriers it can support.

[0039] According to this embodiment, in the case of carrier aggregation, the UE can be directly scheduled to perform ProSe communication on the used secondary carrier (SCC), which is beneficial for, for example, further reducing the measurement time and communication overhead for radio resource configuration.

[0040] Next, taking the case where electronic device 100 operates as a base station as an example, we will illustrate an example method of notifying the UE of the reconfiguration of carrier aggregation. For example, the base station can notify the UE of the reconfiguration of the current carrier aggregation in the form of a bitmap in the Media Access Control (MAC) signaling. Alternatively, the configuration notification can also be implemented by different information elements (IEs) in the same RRC signaling (e.g., RRCConnectionReconfiguration), such as information about the released secondary carrier (sCellToReleaseList) and secondary link configuration information about ProSe (sl-CommConfig), where the carrier frequencies to be released contained in the two IEs are the same as the carrier frequencies for direct communication with neighboring services.

[0041] More specifically, for example, in order to be consistent with the payload structure of existing MAC control units (CEs), 8-bit data bits, as shown in Table 1 below, can be used to indicate the relevant component carrier.

[0042] Table 1

[0043] C7 C6 C5 C4 C3 C2 C1 1

[0044] For example, an 8-bit bitmap is sufficient to indicate whether eight cells are ProSe component carriers, and only a subset of bits can be used as needed. In this example, the last bit is set to 1 to identify this signaling as ProSe indication signaling.

[0045] For the first 7 bits, 0 indicates that the corresponding serving cell does not carry ProSe direct communication; 1 indicates that the corresponding serving cell will carry ProSe direct communication.

[0046] For example, if C7 = 1, it indicates that ProSe direct communication will be established on the primary component carrier PCC; if C6 = 1, it indicates that ProSe direct communication will be established on the secondary component carrier SCC1. In some example embodiments, it can be set that at most one bit in the first 7 bits is 1 while the other bits are all set to 0.

[0047] Alternatively, some or all of the 8 bits can be used for encoding. For example, an 8-bit encoding can represent at least 256 cells, while only a portion of the bits can be used as needed. For example, 3 bits "001" can be used to represent the UE's PCC, "010" can represent the UE's SCC1, etc., as shown in Table 2.

[0048] Table 2

[0049] Indicator 0 / 1 0 / 1 0 / 1 NULL NULL NULL NULL

[0050] Furthermore, according to one embodiment, the second determining unit 113 may be configured to preferentially select component carriers with low channel quality or that are not activated from the aggregated component carriers for release or as carriers for direct communication for neighboring services.

[0051] This embodiment enables the reconfiguration of the current carrier aggregation to allow direct communication between neighboring services while minimizing the impact on existing communications conducted via carrier aggregation.

[0052] According to another embodiment, the second determining unit 113 may be configured to select the same carrier as the carrier for direct communication of proximity services between the second user equipment and the first user equipment when the second user equipment, which is to perform direct communication of proximity services with the first user equipment, is using the same carrier as one of the aggregated component carriers used by the first user equipment.

[0053] In this embodiment, since both user equipments of the two parties in the proximity service direct communication use the component carriers currently in use for proximity service direct communication, it is beneficial to further reduce the measurement time and communication overhead for radio resource configuration.

[0054] Next, taking the case where electronic device 100 operates as a base station as an example, an example method of configuring one of the aggregated component carriers for direct communication of neighbor services will be described. This example involves some aspects of the above embodiments; however, it should be noted that the present invention is not limited to the specific details in this example.

[0055] When it is necessary to select a component carrier from the existing component carriers for direct neighbor service communication, for example based on the sounding reference signal (SRS) reported by the user, the base station compares the channel quality of each component carrier and selects a component carrier with poor channel quality for direct neighbor service communication. Specifically, when two UEs intending to conduct direct neighbor service communication use the same component carrier, this component carrier can be used to carry direct neighbor service communication regardless of channel quality, thus configuring the two UEs with minimal overhead. After selecting the component carrier for carrying direct neighbor service communication from the UE's existing component carriers, the base station can send a component carrier indication signaling to the user equipment, which informs the user equipment on which component carrier to conduct direct neighbor service communication.

[0056] More specifically, suppose UE1 performs cellular communication on component carriers CC1, CC2, and CC3, where CC1 is PCC and CC2 and CC3 are SCC. The base station can compare the uplink channel quality of CC2 and CC3 and select the one with the worse quality, such as CC3, thus determining CC3 as the one for direct communication for neighboring services.

[0057] For example, suppose UE1's PCC is CC1, SCC1 is CC2, SCC2 is CC3, while UE2's PCC is CC1 and it has no SCC. Since UE1 and UE2 use the same carrier CC1, CC1 can be used for direct communication for neighbor services between UE1 and UE2.

[0058] After selecting a carrier, the base station sends a component carrier indication signaling message to the user. This signaling message is used to inform the user on which CC to establish a proximity service direct communication.

[0059] Figure 9 An example of the signaling flow corresponding to this example is shown.

[0060] In step 1: UE2 requests the base station to conduct direct communication with UE1 for proximity services. This request may be, for example, a ProSe UEInformation indication.

[0061] In step 2: The base station determines the reconfiguration method for carrier aggregation, for example, adding a new component carrier to UE1 or selecting one of UE1's existing component carriers for direct communication in the vicinity service;

[0062] For example, in the case where it is determined that one of the existing component carriers will be selected for direct communication for neighboring services, in step 3: the base station selects one of the component carriers of UE1 for direct communication for neighboring services;

[0063] In step 4: The base station sends component carrier indication signaling to UE1 (e.g., through the control unit of the MAC layer);

[0064] In step 5: The base station sends an RRC connection reconfiguration signaling message to UE2;

[0065] In step 6: UE1 sends a component carrier indication signaling reception response to the base station;

[0066] In step 7: UE2 sends an RRC connection reconfiguration response to the base station;

[0067] In step 8: The base station allocates resource blocks from the selected carriers to UE1 and UE2, for example, via the Physical Downlink Control Channel (PDCCH);

[0068] In step 9: UE1 and UE2 perform direct communication for proximity services.

[0069] It should be noted that in some cases, the component carrier indication given by the base station to UE1 in step 4 above is not mandatory. For example, in current proximity service direct communication, there is another method: proximity service direct discovery, which discovers other nearby UEs via direct radio signals on the PC5 interface. In this discovery example, UE2 transmits a discovery signal, and UE1 only needs to receive and discover it without sending information to UE2, so component carrier configuration is unnecessary.

[0070] The foregoing described an embodiment in which one of the aggregated component carriers is configured for direct communication for proximity services. Additionally, according to some embodiments, the second determining unit 113 may also be configured to determine from a predetermined set of carriers a carrier for the first user equipment to perform direct communication for proximity services.

[0071] More specifically, the second determining unit 113 may be configured to select a carrier for direct neighbor service communication from a carrier set (adding a new carrier) when the number of aggregated component carriers used by the first user equipment does not reach a predetermined number. The carrier set may include multiple carriers that can be scheduled by the serving base station of the first user equipment and are not used by the first user equipment or a second user equipment that wants to conduct direct neighbor service communication with the first user equipment.

[0072] When electronic device 100 operates as a base station, the carrier to be used for direct communication for neighborhood services can be selected, for example, in the following ways:

[0073] For each group of user equipment that needs to communicate, a component carrier that can be used for direct communication in the neighborhood service is randomly selected for direct communication in the neighborhood service.

[0074] For each group of user equipment that needs to communicate, the component carriers available for direct communication in proximity services are selected based on the carrier usage. For example, the carrier usage may include how many user equipment are using this component carrier for cellular communication.

[0075] For each group of user equipment that needs to communicate, the component carriers available for direct communication in the neighborhood service are selected based on the historical channel quality measurements (RSRP) of the selectable component carriers reported by the user equipment in that group. The component carrier with the lower historical channel quality is selected for direct communication in the neighborhood service.

[0076] Next, an example method for determining carriers for direct communication in proximity services from a predetermined set of carriers will be described with reference to specific embodiments.

[0077] According to one embodiment, the second determining unit 113 is configured to further select carriers for use in neighboring service direct communication based on the usage of carriers in a predetermined carrier set by other user equipment served by the serving base station besides the first user equipment.

[0078] For example, each group of user equipment that needs to perform direct communication for proximity services can have a list of available carriers. This list can contain all component carriers that the group of user equipment can use to perform direct communication for proximity services. These component carriers can include, for example, all component carriers that the base station can allocate, except for those that the group of user equipment that needs to perform direct communication for proximity services is currently using.

[0079] The purpose of selecting component carriers based on their usage is to use component carriers with minimal interference for direct communication with neighboring services.

[0080] More specifically, the use of a particular carrier may include one or more of the following:

[0081] The number of user equipment currently using a specific carrier for cellular communication; for example, a smaller number of carriers can be preferentially selected to reduce interference between direct communication with neighboring services and cellular communication.

[0082] The number of user equipment currently using a specific carrier for direct communication of neighboring services. For example, a smaller number of carriers can be preferentially selected to reduce interference between direct communication links of neighboring services.

[0083] The coverage range of a specific carrier; for example, a component carrier with a smaller coverage range (i.e., a carrier with a higher frequency) can be selected.

[0084] The frequency with which a particular carrier has been used in historical records; for example, a carrier that has been used less frequently can be selected; and

[0085] The total duration a specific carrier has been used in history; for example, you could choose the carrier with the shortest total usage time.

[0086] By selecting carriers for direct communication with neighboring services based on usage, it is beneficial to reduce the impact of direct communication with neighboring services on cellular communication.

[0087] Figure 10 The signaling flowchart shows the case where the base station selects a carrier from a predetermined set of carriers for direct communication for neighboring services.

[0088] In step 1: UE2 requests the base station to conduct direct communication with UE1 for proximity service;

[0089] In step 2: The base station determines the reconfiguration method for carrier aggregation, for example, determining to add a new component carrier for UE1;

[0090] Step 3: The base station selects a carrier from a predetermined set of carriers for direct communication for proximity services;

[0091] In step 4: The base station sends RRC connection reconfiguration signaling to UE1 and UE2;

[0092] In step 5: UE1 and UE2 send an RRC connection reconfiguration response to the base station;

[0093] In step 6: The base station allocates resource blocks from the selected carrier to UE1 and UE2, for example, via PDCCH;

[0094] In step 7: UE1 and UE2 perform direct communication for proximity services.

[0095] Furthermore, according to one embodiment, a carrier for direct communication in a neighborhood service can be selected based on the reference signal received power (RSRP) measured for a carrier in the carrier set.

[0096] Figure 2 An example configuration of an electronic device for wireless communication according to this embodiment is shown. Figure 2 As shown, the electronic device 200 includes one or more processors 210, each processor 210 including a determining unit 211, an access unit 213, and a selection unit 215. The determining unit 211 and the access unit 215... Figure 1 The configuration of the first determining unit 111 is similar to that described above, and the access unit 213 and the selection unit 215 correspond to the reference. Figure 1 The second defining unit 113 is described.

[0097] Access unit 213 is configured to access the measurement results of the reference signal received power for at least a portion of the carriers in the carrier set.

[0098] Selection unit 215 is configured to select a carrier for direct communication in proximity services based on measurement results, wherein a carrier with low reference signal received power is preferentially selected. Unlike conventional carrier selection methods, according to embodiments of the invention, a carrier with low measurement values ​​can be selected because the measurement pertains to the radio link quality on that carrier between the UE and the base station. However, since the purpose of selection is for direct communication between UEs, the corresponding measurement values ​​of surrounding cellular UEs are also low, making the carrier with low measurement values ​​less likely to be selected for cellular communication, thus making it more suitable for direct communication between UEs with lower interference.

[0099] It should be noted that the access unit 213's access to the measurement results may include accessing historical measurement results of the reference signal received power for different carriers. When the electronic device 200 according to this embodiment operates as a base station, the measurement results can be obtained, for example, by accessing its own stored historical data, or by the user equipment reporting historical measurement results for the corresponding carrier. When the electronic device 200 operates as a user equipment, the measurement results can be obtained, for example, by accessing historical data stored at its serving base station, or by accessing its own stored historical measurement results.

[0100] On the other hand, access to measurement results by access unit 213 may also include access to real-time measurement results of the user equipment for a predetermined carrier. For example, when electronic device 200 operates as a base station, it can notify the user equipment of candidate carriers used for direct communication for proximity services (as will be referred to later). Figure 3 (As illustrated in the embodiment), in other words, a special measurement configuration is performed on the user equipment, and the results of RSRP measurements of the candidate carriers by the user equipment are obtained. When the electronic device 200 operates as a user equipment, a carrier for direct communication for proximity services can be selected based on its measurement results of the candidate carriers.

[0101] Furthermore, according to some embodiments, a carrier for direct communication in a neighboring service can be selected without being based on measurements of all candidate carriers.

[0102] For example, according to one embodiment, the selection unit 215 may be configured to select a carrier to be used for direct communication for neighbor services from the carriers for which measurement results have been obtained when measurement results for all carriers among the candidate carriers have not been obtained within a predetermined time period.

[0103] According to another embodiment, the selection unit 215 can be configured to select a corresponding carrier as the carrier to be used for direct communication of neighbor services when a detection result that meets certain conditions, such as being below a predetermined threshold, is obtained.

[0104] According to yet another embodiment, the selection unit 215 can be configured to select a corresponding carrier as the carrier to be used for direct communication of neighbor services when a detection result is obtained that is continuously below a predetermined threshold for a predetermined period of time.

[0105] The above embodiments can further improve the efficiency of candidate carrier detection and selection.

[0106] The above embodiments will now be described with reference to specific examples, which encompass various aspects of the embodiments described above. It should be understood that the present invention is not limited to the specific details in the following examples.

[0107] First, the base station generates a list of available carriers for each group of user equipment (UEs) seeking direct proximity service communication. This list can contain all carriers available for direct proximity service communication for that group of UEs. As mentioned earlier, the base station can sort the available carriers based on their usage.

[0108] For example, for a neighboring service direct communication user pair consisting of UE1 and UE2:

[0109] Table 3

[0110] Optional carrier list CC 5 CC 6 ……… CC n

[0111] The numbers increase sequentially from CC5 to CC6.

[0112] To avoid excessive delays caused by long measurement processes on user equipment, a timer can be set:

[0113] When the timer expires, the user equipment stops measuring and reports the results of the completed measurements.

[0114] For example, a base station can send a list of optional carriers to a user equipment via RRCConnectionReconfiguration signaling.

[0115] After receiving the list of available carriers, the user equipment begins to measure the RSRP of each carrier sequentially. For example, the RSRP of CC5-CCn was measured within the timer range, as shown in Table 4.

[0116] Table 4

[0117] Optional carrier list RSRP CC 5 RSRP 5 CC 6 RSRP 6 ……… ……… CC n RSRP n

[0118] After the measurement is completed, the user equipment can directly report the measurement results to the base station, which will then select a carrier for direct communication for neighboring services. Alternatively, the user equipment can select a carrier for direct communication for neighboring services, such as CC6, based on the results and report the selection to the base station.

[0119] After receiving the information from UE2, the eNB configures CC6 for UE1 and UE2 as a carrier for direct communication for neighbor services through RRC Connection reconfiguration.

[0120] Furthermore, if the list of available carriers contains a large number of carriers, the time and energy consumption of the UE's measurement process may be significant. Therefore, a measurement event can be defined as follows: the RSRP of the measured carrier falls below a certain threshold, which can be predefined.

[0121] The UE can measure carriers sequentially according to their priority in the list of available carriers. Furthermore, the following conditions can be defined:

[0122] Event entry condition: Mr < threshold Th

[0123] Event exit condition: Mr > threshold Th

[0124] Where Mr represents the RSRP measurement result of the current carrier.

[0125] Upon entering an event, the UE can set a trigger time for the current carrier and continuously measure the RSRP of the current carrier within that trigger time.

[0126] While the UE continuously measures the current carrier, the UE also maintains measurements of other carriers.

[0127] If the current carrier consistently meets the predetermined requirements within the trigger time, the UE stops measuring and reports that the current carrier is used for direct communication for neighbor services.

[0128] If the requirements cannot be met continuously within the trigger time, the event will exit.

[0129] Next, refer to Figure 11 This describes an example process by which the user equipment measures and selects the carrier.

[0130] In step 1: UE2 requests the base station to conduct direct communication with UE1 for proximity service;

[0131] In step 2: The base station determines the reconfiguration method for carrier aggregation, for example, adding a new component carrier for UE1;

[0132] Step 3: The base station generates a list of selectable carriers;

[0133] Step 4: The base station sends a list of selectable carriers to UE1;

[0134] In step 5: UE1 measures RSRP for carriers in the list of available carriers and selects a carrier for direct communication for neighboring services;

[0135] In step 6: UE1 sends the selected carrier information to the base station;

[0136] In step 7: The base station sends RRC connection reconfiguration signaling to UE1 and UE2;

[0137] In step 8: UE1 and UE2 send an RRC connection reconfiguration response to the base station;

[0138] In step 9: The base station allocates resource blocks from the selected carrier to UE1 and UE2, for example, via PDCCH;

[0139] In step 10: UE1 and UE2 perform direct communication for proximity services.

[0140] Next, refer to Figure 3 This section describes a configuration example of an electronic device for wireless communication according to another embodiment of the present invention.

[0141] like Figure 3 As shown, the electronic device 300 includes one or more processors 310, each processor 310 including a first determining unit 311, a second determining unit 313, and a generating unit 315. The configuration of the first determining unit 311 and the second determining unit 313 can be the same as described above. Figure 1 The first determining unit 111 and the second determining unit 113 described herein are similar. Alternatively, the second determining unit 313 may correspond to the previously mentioned reference. Figure 2 The access unit 213 and selection unit 215 are described.

[0142] The generation unit 315 is configured to generate indication information for carriers in the carrier set that can be used for direct communication with neighboring services. For example, the sl-CommConfig in the RRCConnectionReconfiguration message can contain specified or candidate carrier indications.

[0143] Furthermore, the indication information for candidate carriers may also include information about the priority order of the candidate carriers. For example, the order of candidate carriers in the candidate carrier list may correspond to the priority of the candidate carriers, or the indication information for candidate carriers may include information indicating the priority of the respective candidate carrier.

[0144] In addition, such as Figure 3 As shown, according to one embodiment, the electronic device 300 may further include a transceiver 320. When the electronic device 300 operates as a base station, the transceiver 320 may be configured to send indication information for a candidate carrier to at least the user equipment that wants to perform direct communication for proximity services.

[0145] More specifically, the transceiver 320 can be configured to transmit indication information for a candidate carrier via RRC signaling.

[0146] The preceding sections described an embodiment of determining carriers for direct communication for proximity services from a predetermined set of carriers. Furthermore, according to one embodiment, this set of carriers may include a fixed group of carriers dedicated to direct communication for proximity services. In other words, a dedicated carrier-level resource pool can be set up for direct communication for proximity services. For each carrier in this set, there may be a corresponding unique resource configuration, such as the cyclic prefix length of the control transmission on that carrier, the period of the control transmission on the secondary link, the specific time-frequency resource block configuration of the control transmission on the secondary link, the cyclic prefix length of the data on the secondary link, the data frequency hopping configuration on the secondary link, and a user-selected resource configuration (the data time-frequency resource configuration of the secondary link), etc.

[0147] Next, we will illustrate an example of how to set up this dedicated carrier set with specific examples.

[0148] According to a dedicated carrier set configuration method, the carriers in the carrier set are used for direct communication of neighboring services in the case of carrier aggregation. It can be further divided into two configuration methods: static carrier set and dynamic carrier set.

[0149] The carriers in a static carrier set are fixed and are generally narrowband carriers. They are only set up for direct communication for neighborhood services and cannot be used for cellular communication. The carriers in a dynamic carrier set can be updated but can be set to remain constant in number and can be used for both direct communication for neighborhood services and cellular communication.

[0150] An example structure of this carrier set is shown in Table 5.

[0151] Table 5

[0152]

[0153] The carrier set type is 0 for static and 1 for dynamic.

[0154] The carrier ID is the number of the carrier in the carrier set;

[0155] Carriers, such as CC1 and CC3 in the table, represent the frequency range of each carrier in the carrier set.

[0156] In a dynamic carrier set, carriers can be sorted according to priority; for example, carriers that have been reused fewer times have higher priority.

[0157] Static carrier sets can be broadcast in the SIB, for example, while dynamic carrier sets can be configured via RRC signaling, for example.

[0158] The following provides a more specific example of a static carrier set. The base station can reserve M fixed carriers (M can be configured according to actual needs), and these carriers are used only for direct communication between neighboring services.

[0159] For example, if M=3 and the reserved resources are CC1, CC2, and CC3, then the set of static carriers is as shown in Table 6.

[0160] Table 6

[0161]

[0162] For an operator, if the correspondence between carrier ID and carrier remains fixed, the carrier column in the table above can be removed. Accordingly, broadcast information about a static carrier set can only broadcast the carrier ID, thus reducing the broadcast load.

[0163] In addition, when initially configuring a static proximity service direct communication carrier set for a user equipment, multiple different static carrier sets can be configured, and the user equipment can choose which static carrier set to use.

[0164] Furthermore, according to one embodiment, a carrier set dedicated to direct neighbor service communication can also be configured based on the coverage area of ​​the secondary cell (SCell). This carrier set includes multiple fixed sets of carriers dedicated to direct neighbor service communication, where each set of carriers is used for direct neighbor service communication within a specific range.

[0165] According to 3GPP TS36.300, the coverage area of ​​an Scell ​​will vary. A static neighborhood service direct communication carrier set is configured based on a certain coverage area of ​​the Scell. One corresponding static carrier set is configured for each coverage area, and each static carrier set can be used as a group in the initial configuration of the static carrier set.

[0166] The set of direct communication carriers for neighboring services corresponding to the Scell ​​in this coverage area should include the CCs in each Scell ​​that do not overlap with it.

[0167] The following is based on Figure 13 The following example illustrates the situation. Figure 13 As shown, CC1 provides full coverage, while CC2, CC3, and CC4 have different coverage areas. UE1 and UE2 are within the coverage area of ​​CC2, UE3 is within the coverage area of ​​CC3, and UE4 is within the coverage area of ​​CC4. In this case, multiple carrier sets can be configured according to the coverage areas as follows:

[0168] Within the coverage area of ​​CC 2, the carriers in the corresponding static carrier set are: CC 3 and CC 4.

[0169] Within the coverage area of ​​CC 3, the carriers in the corresponding static carrier set are: CC 2 and CC 4.

[0170] Within the coverage area of ​​CC 4, the carriers in the corresponding static carrier set are: CC 2 and CC 3.

[0171] Accordingly, the static carrier set information that the base station sends to all UEs via SIB can be shown in Table 7 below:

[0172] Table 7

[0173]

[0174] After receiving packet pool information in packet form, the UE first considers which carrier set to select, and then selects which carrier in that carrier set.

[0175] For example, a typical way for a UE to select a carrier set is to randomly select a carrier set from the existing carrier sets, compare the carriers in the set with the carriers it is currently using for cellular communication, and if there are no identical carriers, then the carrier set used is used first; if there are identical carriers, then a carrier set is randomly selected from one or more carrier sets containing the same carriers.

[0176] Examples of ways for a UE to select a carrier from a carrier combination include random selection, or the UE can detect the center frequency of each carrier and select the one with the lowest received signal strength.

[0177] The above configuration can further reduce the interference of direct communication between neighboring services on cellular communication.

[0178] Next, we will explain an example configuration method for dynamic carrier sets.

[0179] Before the base station configures the dynamic carrier set to the UE, the base station can select M carriers with the least reuse to form a carrier set based on the current reuse status of the reserved carriers. The carriers in the set can be used for both cellular communication and neighborhood service direct communication.

[0180] For example, if M=3, and the three CCs that are reused the least are CC5, CC6, and CC7, then the dynamic carrier set is shown in Table 8 below.

[0181] Table 8

[0182]

[0183]

[0184] Next, refer to Figure 12 This section provides an example illustrating the process of utilizing carrier sets.

[0185] In step 1: The base station broadcasts a static carrier set, for example, via SIB, and the UE can store the carrier set information;

[0186] Step 2: The user equipment requests direct communication for proximity services;

[0187] Step 3: The base station sends carrier set type information to the user equipment to indicate which carrier set the user equipment uses. This indication information is, for example, 1 bit.

[0188] If the carrier set type is dynamic carrier set, then proceed to step 4, whereby the base station notifies the user equipment of the dynamic carrier set structure.

[0189] If the carrier set type is a static carrier set, step 4 can be skipped and proceed directly to step 5, where the user equipment selects the carrier for direct communication for proximity services.

[0190] Step 6: The user equipment notifies the base station of the selected carrier;

[0191] In step 7: The base station sends RRC connection reconfiguration signaling to UE1 and UE2;

[0192] In step 8: UE1 and UE2 send an RRC connection reconfiguration response to the base station;

[0193] In step 9: The base station allocates resource blocks from the selected carrier to UE1 and UE2, for example, via PDCCH;

[0194] In step 10: UE1 and UE2 perform direct communication for proximity services.

[0195] As previously stated, an electronic device for wireless communication according to an embodiment of the present invention can function as a base station. Next, referring to... Figure 4 This section describes an example configuration of an electronic device according to this embodiment.

[0196] like Figure 4 As shown, the electronic device 400 according to this embodiment includes one or more processors 410 and transceiver devices 420. The processor 410 includes a first determining unit 411 and a second determining unit 413, which are configured similarly to the first determining unit and the second determining unit described above.

[0197] Transceiver 420 is configured to transmit indication information for a carrier set. The carrier set may include a set of carriers dedicated to direct communication for proximity services, as described above with reference to specific embodiments, such as a static carrier set or a dynamic carrier set. Transceiver 420 may broadcast the indication information or send it in RRC signaling.

[0198] More specifically, the transceiver 420 may be configured, for example, to broadcast indication information of the carrier set via a system information block. For example, SystemInformationBlockType18 may be broadcast over the Broadcast Control Channel (BCCH).

[0199] As previously stated, electronic devices for wireless communication according to some embodiments of the present invention can function as user equipment. Next, referring to... Figures 5 to 7 Examples of configurations for electronic devices according to these embodiments are described.

[0200] like Figure 5 As shown, an electronic device 500 for wireless communication according to one embodiment includes one or more processors 510 and transceiver devices 520. The processor 510 includes a first determining unit 511 and a second determining unit 513, which are configured similarly to the first determining unit and the second determining unit described above.

[0201] The transceiver 520 is configured to receive indication information from the base station for candidate carriers to be used for direct communication for proximity services.

[0202] like Figure 6 As shown, an electronic device 600 for wireless communication according to another embodiment includes one or more processors 610 and transceiver devices 620. The processor 610 includes a first determining unit 611, a second determining unit 613, and a control unit 615. The first determining unit 611 has a similar configuration to the first determining unit described above. The transceiver device 620 is similar to the one described above. Figure 5 The configuration of the transceiver 520 described is similar.

[0203] The control unit 615 is configured to control the measurement of the reference signal received power against the candidate carrier.

[0204] The second determining unit 613 is configured to select a carrier for direct communication in the vicinity service based on the measurement results of the reference signal received power, wherein a carrier with low reference signal received power is preferentially selected.

[0205] Furthermore, according to one embodiment, the second determining unit 613 is configured to: select a carrier to be used for direct communication for neighbor services from the carriers from which measurement results have been obtained if no measurement results for a carrier among the candidate carriers are obtained within a predetermined time period.

[0206] According to another embodiment, the second determining unit 613 is configured to select a corresponding carrier as the carrier to be used for direct communication of neighbor services when a detection result that meets the conditions, such as being below a predetermined threshold, is obtained.

[0207] According to yet another embodiment, the second determining unit 613 is configured to select a corresponding carrier as a carrier to be used for direct communication of neighbor services when a detection result is obtained that is continuously below a predetermined threshold for a predetermined period of time.

[0208] like Figure 7 As shown, an electronic device 700 for wireless communication according to another embodiment includes one or more processors 710 and transceiver devices 720. The processor 710 includes a first determining unit 711, a second determining unit 713, a control unit 715, and a generating unit 717. The first determining unit 711 has a similar configuration to the first determining unit described above.

[0209] The control unit 715 is configured to control the measurement of the reference signal received power against the candidate carrier.

[0210] The generation unit 717 is configured to generate indication information of the measurement results of the reference signal received power for the candidate carrier.

[0211] Transceiver 720 and the previous reference Figure 5 The transceiver 520 described herein is configured similarly. In addition, the transceiver 720 is also configured to transmit indication information of measurement results.

[0212] In the preceding description of the device according to the embodiments of the present invention, some processing and methods have obviously been disclosed. Next, without repeating the specific details described above, a description of the wireless communication method according to the embodiments of the present invention will be given.

[0213] like Figure 8 As shown, the wireless communication method according to an embodiment of the present invention includes step S810 of determining the current carrier aggregation state of the first user equipment in response to a proximity service direct communication request of the first user equipment. Furthermore, the method also includes step S820 of determining the radio resource configuration of the first user equipment based on the carrier aggregation state of the first user equipment, wherein the radio resource configuration is used for proximity service direct communication of the first user equipment.

[0214] Referring to the preceding description, each step of the wireless communication method according to this embodiment can be performed by a base station, by a user equipment, or by both a base station and a user equipment.

[0215] Figure 18 An example configuration of a device for wireless communication according to an embodiment of the present invention is shown. Figure 18As shown, the device 1800 according to this embodiment includes a first determining device 1810 and a second determining device 1820. The first determining device 1810 is configured to determine the current carrier aggregation state of the first user equipment in response to a proximity service direct communication request of the first user equipment. The second determining device 1820 is configured to determine the radio resource configuration of the first user equipment based on the carrier aggregation state of the first user equipment, wherein the radio resource configuration is used for the proximity service direct communication of the first user equipment. The device 1800 can be implemented as a base station and a user equipment.

[0216] As an example, the various steps of the above method and the various components and / or units of the above apparatus can be implemented as software, firmware, hardware, or a combination thereof. When implemented via software or firmware, data can be transferred from a storage medium or network to a computer with a dedicated hardware architecture (e.g., Figure 15 The general-purpose computer 1500 shown is equipped with programs that constitute software for implementing the above methods. When various programs are installed, the computer is able to perform various functions, etc.

[0217] exist Figure 15 In this system, the arithmetic processing unit (CPU) 1501 performs various processes based on the program stored in the read-only memory (ROM) 1502 or the program loaded into the random access memory (RAM) 1503 from the storage section 1508. The RAM 1503 also stores data required as needed when the CPU 1501 performs various processes, etc. The CPU 1501, ROM 1502, and RAM 1503 are linked to each other via a bus 1504. The input / output interface 1505 is also linked to the bus 1504.

[0218] The following components are linked to the input / output interface 1505: input section 1506 (including keyboard, mouse, etc.), output section 1507 (including display, such as cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.), storage section 1508 (including hard disk, etc.), and communication section 1509 (including network interface cards such as LAN cards, modems, etc.). The communication section 1509 performs communication processing via a network such as the Internet. Drive 1510 may also be linked to the input / output interface 1505 as needed. Removable media 1511, such as disks, optical disks, magneto-optical disks, semiconductor memories, etc., are installed on drive 1510 as needed, so that computer programs read from them can be installed into storage section 1508 as needed.

[0219] When the above series of processes are implemented by software, the program constituting the software is installed from a network such as the Internet or a storage medium such as removable media 1511.

[0220] Those skilled in the art will understand that such storage media are not limited to Figure 15 The illustration shows a removable medium 1511 containing a program, distributed separately from the device to provide the program to the user. Examples of removable media 1511 include magnetic disks (including floppy disks (registered trademark)), optical disks (including optical disc read-only memory (CD-ROM) and digital versatile disks (DVD)), magneto-optical disks (including mini-disk (MD) (registered trademark)), and semiconductor memory. Alternatively, the storage medium may be ROM 1502, a hard disk included in storage section 1508, etc., containing programs and distributed to the user along with the device containing them.

[0221] Embodiments of the present invention also relate to a program product storing machine-readable instruction code. When the instruction code is read and executed by a machine, the method described above according to embodiments of the present invention can be performed.

[0222] Accordingly, the storage medium used to carry the program product storing machine-readable instruction code is also included in the disclosure of this invention. The storage medium includes, but is not limited to, floppy disks, optical disks, magneto-optical disks, memory cards, memory sticks, etc.

[0223] Embodiments of this application also relate to the following electronic devices. When used on the base station side, the electronic device can be implemented as any type of evolved Node B (eNB), such as macro eNBs and small eNBs. A small eNB can be an eNB covering a cell smaller than a macro cell, such as a pico eNB, micro eNB, and femtocell eNB. Alternatively, the electronic device can be implemented as any other type of base station, such as a NodeB and a Base Transceiver Station (BTS). The electronic device may include: a subject configured to control wireless communication (also called a base station device); and one or more remote radio heads (RRHs) located in a different location from the subject. Furthermore, the various types of terminals described below can operate as base stations by temporarily or semi-persistently performing base station functions.

[0224] When used on the user equipment side, the electronic device can be implemented as a mobile terminal (such as a smartphone, tablet PC, laptop PC, portable gaming terminal, portable / dongle-type mobile router, and digital camera device) or an in-vehicle terminal (such as a car navigation device). Furthermore, the electronic device can be a wireless communication module (such as an integrated circuit module comprising one or more chips) installed on each of the aforementioned terminals.

[0225] [Application examples of terminal devices]

[0226] Figure 16This is a block diagram illustrating an example of a schematic configuration of a smartphone 2500 to which the technologies of this disclosure can be applied. The smartphone 2500 includes a processor 2501, a memory 2502, a storage device 2503, an external connection interface 2504, a camera device 2506, a sensor 2507, a microphone 2508, an input device 2509, a display device 2510, a speaker 2511, a wireless communication interface 2512, one or more antenna switches 2515, one or more antennas 2516, a bus 2517, a battery 2518, and an auxiliary controller 2519.

[0227] Processor 2501 may be, for example, a CPU or a system-on-a-chip (SoC), and controls the application layer and other functions of smartphone 2500. Memory 2502 includes RAM and ROM, and stores data and programs executed by processor 2501. Storage device 2503 may include storage media such as semiconductor memory and hard disk. External connection interface 2504 is an interface for connecting external devices (such as memory cards and Universal Serial Bus (USB) devices) to smartphone 2500.

[0228] Camera device 2506 includes an image sensor (such as a charge-coupled device (CCD) and complementary metal-oxide-semiconductor (CMOS)) and generates captured images. Sensor 2507 may include a set of sensors, such as a measurement sensor, a gyroscope sensor, a geomagnetic sensor, and an accelerometer. Microphone 2508 converts sound input to smartphone 2500 into an audio signal. Input device 2509 includes, for example, a touch sensor, keypad, keyboard, buttons, or switches configured to detect touches on the screen of display device 2510 and receives operations or information input from the user. Display device 2510 includes a screen (such as a liquid crystal display (LCD) and an organic light-emitting diode (OLED) display) and displays the output image of smartphone 2500. Speaker 2511 converts the audio signal output from smartphone 2500 into sound.

[0229] The wireless communication interface 2512 supports any cellular communication scheme (such as LTE and LTE-Advanced) and performs wireless communication. The wireless communication interface 2512 typically includes, for example, a BB processor 2513 and RF circuitry 2514. The BB processor 2513 can perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and performs various types of signal processing for wireless communication. Meanwhile, the RF circuitry 2514 can include, for example, a mixer, filters, and amplifiers, and transmits and receives wireless signals via antenna 2516. The wireless communication interface 2512 can be a single chip module on which the BB processor 2513 and RF circuitry 2514 are integrated. Figure 16As shown, the wireless communication interface 2512 may include multiple BB processors 2513 and multiple RF circuits 2514. Although Figure 16 An example is shown in which the wireless communication interface 2512 includes multiple BB processors 2513 and multiple RF circuits 2514, but the wireless communication interface 2512 may also include a single BB processor 2513 or a single RF circuit 2514.

[0230] In addition to cellular communication schemes, the wireless communication interface 2512 can support other types of wireless communication schemes, such as short-range wireless communication schemes, near-field communication schemes, and wireless local area network (LAN) schemes. In this case, the wireless communication interface 2512 may include a BB processor 2513 and RF circuitry 2514 for each wireless communication scheme.

[0231] Each of the antenna switches 2515 switches the connection destination of the antenna 2516 among multiple circuits (e.g., circuits for different wireless communication schemes) included in the wireless communication interface 2512.

[0232] Each of the antennas 2516 includes one or more antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used by the wireless communication interface 2512 to transmit and receive wireless signals. Figure 16 As shown, the smartphone 2500 may include multiple antennas 2516. Although Figure 16 An example is shown in which the smartphone 2500 includes multiple antennas 2516, but the smartphone 2500 may also include a single antenna 2516.

[0233] Furthermore, the smartphone 2500 may include an antenna 2516 for each wireless communication scheme. In this case, the antenna switch 2515 can be omitted from the configuration of the smartphone 2500.

[0234] Bus 2517 connects processor 2501, memory 2502, storage device 2503, external connection interface 2504, camera device 2506, sensor 2507, microphone 2508, input device 2509, display device 2510, speaker 2511, wireless communication interface 2512, and auxiliary controller 2519 to each other. Battery 2518 supplies power to... Figure 16 The various blocks of the smartphone 2500 shown are powered, and the feeders are partially shown as dashed lines in the diagram. The auxiliary controller 2519 operates the minimum necessary functions of the smartphone 2500, for example, in sleep mode.

[0235] exist Figure 16 In the smartphone 2500 shown, by using Figures 3 to 7The described transceiver can be implemented using a wireless communication interface 2512. (See reference...) Figures 1 to 7 At least a portion of the functions of each described unit can also be implemented by the processor 2501 or the auxiliary controller 2519. For example, the power consumption of the battery 2518 can be reduced by having the auxiliary controller 2519 execute some of the functions of the processor 2501. Furthermore, the processor 2501 or the auxiliary controller 2519 can execute the reference program by executing the program stored in the memory 2502 or the storage device 2503. Figures 1 to 7 The description includes at least a portion of the functions of each unit.

[0236] [Application examples of base stations]

[0237] Figure 17 This is a block diagram illustrating an example of a schematic configuration of an eNB to which the technologies of this disclosure can be applied. The eNB 2300 includes one or more antennas 2310 and a base station device 2320. The base station device 2320 and each antenna 2310 can be connected to each other via RF (radio frequency) cables.

[0238] Each of the antennas 2310 includes one or more antenna elements (such as multiple antenna elements included in a multiple-input multiple-output (MIMO) antenna) and is used by the base station equipment 2320 to transmit and receive wireless signals. Figure 17 As shown, the eNB 2300 may include multiple antennas 2310. For example, the multiple antennas 2310 may be compatible with multiple frequency bands used by the eNB 2300. Although Figure 17 An example is shown in which the eNB 2300 includes multiple antennas 2310, but the eNB 2300 may also include a single antenna 2310.

[0239] The base station equipment 2320 includes a controller 2321, a memory 2322, a network interface 2323, and a wireless communication interface 2325.

[0240] The controller 2321 can be, for example, a CPU or a DSP, and operates various higher-level functions of the base station equipment 2320. For example, the controller 2321 generates data packets based on data in signals processed by the wireless communication interface 2325, and transmits the generated packets via the network interface 2323. The controller 2321 can bundle data from multiple baseband processors to generate bundled packets and transmit the generated bundled packets. The controller 2321 may have logical functions that perform controls such as radio resource control, radio bearer control, mobility management, admission control, and scheduling. This control can be performed in conjunction with nearby eNBs or core network nodes. The memory 2322 includes RAM and ROM, and stores programs executed by the controller 2321 and various types of control data (such as terminal lists, transmission power data, and scheduling data).

[0241] Network interface 2323 is a communication interface used to connect base station equipment 2320 to core network 2324. Controller 2321 can communicate with core network nodes or other eNBs via network interface 2323. In this case, eNB 2300 and core network nodes or other eNBs can be connected to each other via logical interfaces (such as S1 and X2 interfaces). Network interface 2323 can also be a wired communication interface or a wireless communication interface for wireless backhaul. If network interface 2323 is a wireless communication interface, it can use a higher frequency band for wireless communication compared to the frequency band used by wireless communication interface 2325.

[0242] Wireless communication interface 2325 supports any cellular communication scheme (such as LTE and LTE-Advanced) and provides wireless connectivity to terminals located in the cell of eNB 2300 via antenna 2310. Wireless communication interface 2325 typically includes, for example, a baseband (BB) processor 2326 and RF circuitry 2327. BB processor 2326 can perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and performs various types of signal processing at layers such as L1, Media Access Control (MAC), Radio Link Control (RLC), and Packet Data Convergence Protocol (PDCP). Instead of controller 2321, BB processor 2326 may have some or all of the above-described logical functions. BB processor 2326 may be a memory storing communication control programs, or a module including a processor and associated circuitry configured to execute programs. Update programs can change the functionality of BB processor 2326. The module may be a card or blade inserted into a slot in base station equipment 2320. Alternatively, the module may be a chip mounted on a card or blade. Meanwhile, the RF circuit 2327 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives wireless signals via the antenna 2310.

[0243] like Figure 17 As shown, the wireless communication interface 2325 may include multiple BB processors 2326. For example, the multiple BB processors 2326 may be compatible with multiple frequency bands used by the eNB 2300. Figure 17 As shown, the wireless communication interface 2325 may include multiple RF circuits 2327. For example, the multiple RF circuits 2327 may be compatible with multiple antenna elements. Although Figure 17 An example is shown in which the wireless communication interface 2325 includes multiple BB processors 2326 and multiple RF circuits 2327, but the wireless communication interface 2325 may also include a single BB processor 2326 or a single RF circuit 2327.

[0244] exist Figure 17 In the eNB 2300 shown, by using Figure 3 and Figure 4 The described transceiver can be implemented using a wireless communication interface 2325. (See reference...) Figures 1 to 4 At least a portion of the functions of the described units can also be performed by the controller 2321. For example, the controller 2321 can execute the referenced functions by executing a program stored in the memory 2322. Figures 1 to 4 The description includes at least a portion of the functions of each unit.

[0245] Furthermore, the technology disclosed herein can be configured as follows:

[0246] Configuration 1. An electronic device for wireless communication, comprising:

[0247] One or more processors are configured to

[0248] In response to a direct communication request for proximity services from a first user equipment, determine the current carrier aggregation state of the first user equipment; and

[0249] Based on the carrier aggregation state of the first user equipment, the radio resource configuration of the first user equipment is determined, wherein the radio resource configuration is used for direct communication of the first user equipment in the vicinity service.

[0250] Configuration 2. The electronic device according to Configuration 1, wherein, based on the determined carrier aggregation state and the device capabilities of the first user equipment, it is determined whether to reconfigure the current carrier aggregation to enable direct communication of neighboring services, wherein the carrier aggregation state includes the number of aggregated component carriers.

[0251] Configuration 3. The electronic device according to Configuration 2, wherein reconfiguration of the current carrier aggregation includes at least one of the following:

[0252] Release at least one aggregated component carrier; and

[0253] Configure one of the aggregated component carriers for direct communication with neighboring services.

[0254] Configuration 4. The electronic device according to Configuration 2, wherein the one or more processors are further configured to determine from a predetermined set of carriers a carrier for the first user equipment to perform proximity service direct communication.

[0255] Configuration 5. The electronic device according to Configuration 3, wherein the one or more processors are configured to: preferentially select component carriers with low channel quality or that are not activated from the aggregated component carriers for release or as carriers for direct communication for neighboring services.

[0256] Configuration 6. The electronic device according to Configuration 3, wherein the one or more processors are configured to: select the same carrier as the carrier for direct proximity service communication between the second user equipment and the first user equipment when the second user equipment, which is to perform proximity service direct communication with the first user equipment, is using the same carrier as one of the aggregated component carriers.

[0257] Configuration 7. The electronic device according to Configuration 4, wherein the one or more processors are configured to: select carriers from the carrier set for use in direct neighbor service communication when the number of aggregated component carriers used by the first user equipment does not reach a predetermined number, wherein the carrier set includes multiple carriers that can be scheduled by the serving base station of the first user equipment and are not used by the first user equipment or a second user equipment that wants to perform direct neighbor service communication with the first user equipment.

[0258] Configuration 8. The electronic device according to Configuration 7, wherein the one or more processors are configured to: further select carriers to be used for the neighboring service direct communication based on the usage of carriers in the carrier set by other user equipment served by the serving base station besides the first user equipment.

[0259] Configuration 9. The electronic device according to Configuration 8, wherein the use of a particular carrier includes one or more of the following aspects:

[0260] The number of user equipment currently using the specific carrier for cellular communication;

[0261] The number of user equipment currently using the specific carrier for direct communication for proximity services;

[0262] The coverage area of ​​the specific carrier;

[0263] The frequency with which the specific carrier was used in historical records; and

[0264] The total duration for which the specific carrier was used in historical records.

[0265] Configuration 10. The electronic device according to Configuration 7, wherein the one or more processors are configured to:

[0266] Access the measurement results of the reference signal received power for at least a portion of the carriers in the carrier set; and

[0267] The carrier to be used for the direct communication of the proximity service is selected based on the measurement results, wherein a carrier with low reference signal received power is preferred.

[0268] Configuration 11. The electronic device according to Configuration 7, wherein the one or more processors are configured to: generate indication information for carriers in the carrier set that can be used as candidate carriers for direct communication of the proximity service.

[0269] Configuration 12. The electronic device according to Configuration 11, wherein the indication information for the candidate carrier includes information regarding the priority order of the candidate carrier.

[0270] Configuration 13. The electronic device according to Configuration 11 further includes:

[0271] The transceiver is configured to transmit indication information for the candidate carrier to at least the first user equipment.

[0272] Configuration 14. The electronic device according to Configuration 13, wherein the transceiver is configured to transmit indication information for the candidate carrier via radio resource control signaling.

[0273] Configuration 15. The electronic device according to Configuration 10, wherein the one or more processors are configured to: when the measurement results of all carriers of the at least portion of the carriers are not obtained within a predetermined time period, select a carrier from the carriers for which the measurement results have been obtained for the neighboring service direct communication.

[0274] Configuration 16. The electronic device according to Configuration 10, wherein the one or more processors are configured to: select a corresponding carrier as the carrier to be used for the neighbor service direct communication when the detection result is obtained below a predetermined threshold.

[0275] Configuration 17. The electronic device according to Configuration 10, wherein the one or more processors are configured to: select a corresponding carrier as a carrier to be used for direct communication of the neighboring service when the detection result is obtained and remains below a predetermined threshold for a predetermined period of time.

[0276] Configuration 18. The electronic device according to Configuration 4, wherein the carrier set includes a fixed set of carriers dedicated to direct communication for proximity services.

[0277] Configuration 19. The electronic device according to Configuration 4, wherein the carrier set includes multiple fixed carriers dedicated to direct communication for proximity services, wherein each carrier group is used for direct communication for proximity services within a specific range.

[0278] Configuration 20. The electronic device according to Configuration 4 further includes:

[0279] The transceiver is configured to transmit indication information for the carrier set.

[0280] Configuration 21. The electronic device according to Configuration 20, wherein the transceiver is configured to broadcast indication information for the carrier set via a system information block.

[0281] Configuration 22. An electronic device according to any one of Configurations 1 to 21, wherein the electronic device functions as a serving base station for the first user equipment.

[0282] Configuration 23. An electronic device according to any one of Configurations 1 to 6, wherein the electronic device operates as the first user equipment.

[0283] Configuration 24. The electronic device according to Configuration 23 further includes:

[0284] The transceiver is configured to receive indication information from the base station for candidate carriers to be used for direct communication of the proximity service.

[0285] Configuration 25. The electronic device according to configuration 24, wherein the one or more processors are further configured to:

[0286] Controlling the measurement of the reference signal received power for the candidate carrier; and

[0287] The carrier to be used for the direct communication of the proximity service is selected based on the measurement results of the reference signal received power, wherein carriers with low reference signal received power are preferred.

[0288] Configuration 26. The electronic device according to Configuration 25, wherein the one or more processors are configured to: when the measurement results of all carriers of the candidate carriers are not obtained within a predetermined time period, select a carrier from the carriers for which the measurement results have been obtained for the neighbor service direct communication.

[0289] Configuration 27. The electronic device according to Configuration 25, wherein the one or more processors are configured to: when the detection result is obtained below a predetermined threshold, select a corresponding carrier as the carrier to be used for the direct communication of the neighboring service.

[0290] Configuration 28. The electronic device according to Configuration 25, wherein the one or more processors are configured to: select a corresponding carrier as a carrier for direct communication of the neighboring service when the detection result is obtained and remains below a predetermined threshold for a predetermined period of time.

[0291] Configuration 29. The electronic device according to configuration 24, wherein the one or more processors are further configured to:

[0292] Controlling the measurement of the reference signal received power for the candidate carrier; and

[0293] Generate indication information of the measurement results of the reference signal received power for the candidate carrier.

[0294] Configuration 30. A wireless communication method, comprising:

[0295] In response to a direct communication request for proximity services from a first user equipment, determine the current carrier aggregation state of the first user equipment; and

[0296] Based on the carrier aggregation state of the first user equipment, the radio resource configuration of the first user equipment is determined, wherein the radio resource configuration is used for direct communication of the first user equipment in the vicinity service.

[0297] In the above description of specific embodiments of the present invention, features described and / or shown for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0298] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, element, step, or component, but does not exclude the presence or addition of one or more other features, elements, steps, or components.

[0299] In the above embodiments and examples, numerical reference numerals are used to denote various steps and / or units. Those skilled in the art will understand that these reference numerals are merely for ease of description and drawing, and do not indicate their order or any other limitation.

[0300] Furthermore, the method of the present invention is not limited to being executed in the chronological order described in the specification, but may also be executed in other chronological orders, in parallel, or independently. Therefore, the execution order of the method described in this specification does not constitute a limitation on the technical scope of the present invention.

[0301] Although the invention has been disclosed above through the description of specific embodiments, it should be understood that all the embodiments and examples described above are exemplary and not restrictive. Those skilled in the art can design various modifications, improvements, or equivalents to the invention within the spirit and scope of the appended claims. These modifications, improvements, or equivalents should also be considered to be included within the protection scope of the invention.

Claims

1. An electronic device at a user equipment side, comprising: circuitry configured to determine a proximity service direct communication requirement of the user equipment, select a carrier to be used for proximity service direct communication from a predetermined set of carriers based on a capability of the user equipment, the capability of the user equipment including an upper limit of a number of carriers that can be supported for uplink carrier aggregation, perform proximity service direct communication carrier aggregation transmission using the selected carrier, wherein the circuitry is configured to select a carrier that is less frequently used from the predetermined set of carriers for proximity service direct communication in a case where the number of carriers used for carrier aggregation by the user equipment does not reach the upper limit, and wherein a carrier that is less frequently used among carriers in the predetermined set of carriers has a higher priority for proximity service direct communication. 2.The electronic device of claim 1, wherein, The circuitry is further configured to acquire indication information of the predetermined set of carriers by receiving a system information block that is broadcast. 3.The electronic device of claim 1, wherein, The circuitry is further configured to acquire indication information of a set of indication information of the predetermined set of carriers by receiving SystemInformationBlockType18 on a broadcast control channel (BCCH).

4. The electronic device of claim 1, wherein, The circuitry is further configured to acquire indication information of the predetermined set of carriers by receiving radio resource configuration signaling. 5.The electronic device of claim 1, wherein, The predetermined set of carriers includes one or more sets of carriers that can be used for proximity service direct communication.

6. The electronic device of claim 1, wherein, The circuitry is further configured to notify a base station side of the selected carrier.

7. The electronic device of any of claims 1-6, wherein, The electronic device operates as the user equipment. 8.An electronic device at a base station side, comprising: circuitry configured to provide indication information of a predetermined set of carriers to a user equipment for the user equipment to select a carrier to be used for proximity service direct communication from the predetermined set of carriers based on a capability of the user equipment in a case where the user equipment determines a proximity service direct communication requirement, wherein the capability of the user equipment includes an upper limit of a number of carriers that can be supported for uplink carrier aggregation, and the user equipment selects a carrier that is less frequently used from the predetermined set of carriers in a case where the number of carriers used for carrier aggregation by the user equipment does not reach the upper limit, wherein a carrier that is less frequently used among carriers in the predetermined set of carriers has a higher priority for proximity service direct communication.

9. The electronic device of claim 8, wherein, The circuitry is further configured to broadcast indication information of the predetermined set of carriers through a system information block. 10.The electronic device of claim 8, wherein, The circuitry is further configured to provide indication information of the predetermined set of carriers through SystemInformationBlockType18 on a broadcast control channel (BCCH). 11.The electronic device of claim 8, wherein, The circuitry is further configured to provide indication information of the predetermined set of carriers through radio resource configuration signaling.

12. The electronic device of claim 8, wherein, The predetermined set of carriers includes one or more sets of carriers that can be used for proximity service direct communication.

13. The electronic device of claim 8, wherein, The circuitry is further configured to receive a notification about the selected carrier from the user equipment.

14. The electronic device of any of claims 8-13, wherein, The electronic device operates as the base station. 15.A wireless communication method at a user equipment side, comprising: determining a proximity service direct communication requirement of the user equipment, selecting a carrier to be used for proximity service direct communication from a predetermined carrier set based on a capability of the user equipment, the capability of the user equipment including an upper limit of a number of carriers that can be supported for uplink carrier aggregation, performing proximity service direct communication carrier aggregation transmission using the selected carrier, wherein, in a case where the number of carriers used for carrier aggregation by the user equipment does not reach the upper limit, a carrier that is less frequently used is selected from the predetermined carrier set for proximity service direct communication, and wherein, among the carriers in the predetermined carrier set, the lower the frequency of use of a carrier, the higher the priority of the carrier for proximity service direct communication.

16. A wireless communication method on a base station side, comprising: providing, to a user equipment, indication information of a predetermined carrier set for the user equipment to select a carrier to be used for proximity service direct communication from the predetermined carrier set based on a capability of the user equipment in a case where a proximity service direct communication demand is determined, wherein the capability of the user equipment includes an upper limit of a number of carriers that can be supported for uplink carrier aggregation, and the user equipment selects a carrier that is less frequently used from the predetermined carrier set in a case where the number of carriers used for carrier aggregation by the user equipment does not reach the upper limit, wherein, among the carriers in the predetermined carrier set, the lower the frequency of use of a carrier, the higher the priority of the carrier for proximity service direct communication.

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