Electronic device and wireless communication method in wireless communication system

Abstract

The present disclosure relates to electronic devices and wireless communication methods in wireless communication systems. There are at least one first cell and at least one second cell in the wireless communication system, and at least one of the second cells is a second cell operating in an unlicensed frequency band. The electronic device includes: one or more processing circuits, and the processing circuits are configured to perform the following operations: configure at least one second cell operating in an unlicensed frequency band for a user device to perform carrier aggregation communication; and for each second cell operating in an unlicensed frequency band, dynamically or semi-statically generate energy detection threshold information, so that the user device can perform energy detection on the unlicensed frequency band based on the energy detection threshold information. Using the electronic device and wireless communication method according to the present disclosure, the use of unlicensed spectrum can be optimized by designing a reasonable dynamic adjustment mechanism for the energy detection threshold without making major changes to existing standards and chips.

Description

[0001] This application is a divisional application of the Chinese patent application filed on August 13, 2015, with application number 201510498448.5 and invention name “Electronic device and wireless communication method in wireless communication system”. Technical Field

[0002] The present disclosure relates to the technical field of wireless communications, and in particular to an electronic device in a wireless communication system and a method for performing wireless communications in the wireless communication system. Background Art

[0003] This section provides background information related to the present disclosure which is not necessarily prior art.

[0004] As wireless networks evolve, they carry more and more services, so additional spectrum resources are needed to support large amounts of data transmission. Cellular wireless network operators are beginning to explore how to use unlicensed spectrum resources such as the 5GHz ISM (Industrial Scientific Medical) band based on the existing LTE (Long Term Evolution) network. On the other hand, the WiFi wireless industry is also deploying more WiFi systems in unlicensed spectrum. Communication systems between different operators have equal rights to use unlicensed bands. How to use the same unlicensed band fairly and effectively has become a problem that the industry needs to solve immediately. The general consensus in the industry is that unlicensed bands need to be used with the assistance of licensed bands and provide services to terminals through carrier aggregation.

[0005] In order to solve the coexistence problem of the two systems, there is a method that determines different spectrum usage times for the two different systems, so that the two systems can use spectrum resources together in a time-division manner. Therefore, the LTE systems of different operators are required to use unlicensed frequency bands at the same time and avoid spectrum use at the same time, so as to give the WiFi system a chance to use the spectrum. This requires synchronization of unlicensed frequency band cells of different operators. In addition, in order to ensure the coexistence of LTE and WiFi systems and the time-division use of spectrum resources, the existing technology requires the LTE system to transmit WiFi signals so that the WiFi system can stop transmitting for a period of time so that LTE can transmit. However, such technology has major changes to existing standards and chips.

[0006] Therefore, it is necessary to propose a new wireless communication technology solution to optimize the use of unlicensed spectrum without making major changes to existing standards and chips. Summary of the invention

[0007] This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.

[0008] The purpose of the present disclosure is to provide an electronic device in a wireless communication system and a method for performing wireless communication in the wireless communication system, so that the use of unlicensed spectrum can be optimized by designing a reasonable energy detection threshold dynamic adjustment mechanism without making major changes to existing standards and chips.

[0009] According to one aspect of the present disclosure, an electronic device in a wireless communication system is provided, wherein there are at least one first cell and at least one second cell in the wireless communication system, at least one of the second cells is a second cell operating in an unlicensed frequency band, and the electronic device includes: one or more processing circuits, the processing circuits being configured to perform the following operations: configuring at least one second cell operating in an unlicensed frequency band for a user device to perform carrier aggregation communication; and dynamically or semi-statically generating energy detection threshold information for each second cell operating in the unlicensed frequency band, so that the user device performs energy detection on the unlicensed frequency band based on the energy detection threshold information.

[0010] According to another aspect of the present disclosure, a user equipment in a wireless communication system is provided, wherein there are at least one first cell and at least one second cell in the wireless communication system, at least one of the second cells is a second cell operating in an unlicensed frequency band, and the user equipment includes: a transceiver, the transceiver being configured to receive configuration information of at least one second cell operating in the unlicensed frequency band for carrier aggregation, and to receive energy detection threshold information for each second cell operating in the unlicensed frequency band respectively; and one or more processing circuits, the processing circuits being configured to perform energy detection on the unlicensed frequency bands respectively based on the energy detection threshold information.

[0011] According to another aspect of the present disclosure, a base station in a wireless communication system is provided, the base station managing a first cell and a second cell, wherein the first cell operates in an authorized frequency band and the second cell operates in an unauthorized frequency band, the base station comprising: one or more processing circuits, the processing circuits being configured to perform the following operations: generating a plurality of energy detection threshold values ​​based on a network status, and including the plurality of energy detection threshold values ​​in a first signaling; and generating, for the second cell, an energy detection threshold indication for indicating one of the plurality of energy detection threshold values, so that a user equipment performs energy detection on an unauthorized frequency band corresponding to the second cell based on the energy detection threshold indication, and including the energy detection threshold indication in a second signaling, wherein a transmission interval of the first signaling is longer than a transmission interval of the second signaling.

[0012] According to another aspect of the present disclosure, a user equipment in a wireless communication system is provided, wherein there is a first cell and at least one second cell in the wireless communication system, at least one of the second cells is a second cell operating in an unlicensed frequency band, and the user equipment includes: a transceiver; and one or more processing circuits, the processing circuits being configured to perform the following operations: causing the transceiver to receive a first signaling from a base station providing services for the user equipment, wherein the first signaling includes a plurality of energy detection threshold values; causing the transceiver to receive a second signaling from the base station, wherein the second signaling includes an energy detection threshold indication for indicating one of the plurality of energy detection threshold values; and performing energy detection on the unlicensed frequency band based on the energy detection threshold indication, wherein a transmission interval of the first signaling is longer than a transmission interval of the second signaling.

[0013] According to another aspect of the present disclosure, a method for performing wireless communications in a wireless communication system is provided, wherein there are at least one first cell and at least one second cell in the wireless communication system, at least one of the second cells being a second cell operating in an unlicensed frequency band, the method comprising: configuring at least one second cell operating in an unlicensed frequency band for a user equipment to perform carrier aggregation communication; and dynamically or semi-statically generating energy detection threshold information for each second cell operating in the unlicensed frequency band, so that the user equipment performs energy detection on the unlicensed frequency band based on the energy detection threshold information.

[0014] According to another aspect of the present disclosure, a method for performing wireless communications in a wireless communication system is provided, wherein there are at least one first cell and at least one second cell in the wireless communication system, at least one of the second cells is a second cell operating in an unlicensed frequency band, and the method comprises: receiving configuration information of at least one second cell operating in an unlicensed frequency band for carrier aggregation; receiving energy detection threshold information for each second cell operating in the unlicensed frequency band respectively; and performing energy detection on the unlicensed frequency bands respectively based on the energy detection threshold information.

[0015] According to another aspect of the present disclosure, a method for performing wireless communications in a wireless communication system is provided, wherein a base station in the wireless communication system manages a first cell and a second cell, wherein the first cell operates in an authorized frequency band and the second cell operates in an unauthorized frequency band, and the method comprises: generating a plurality of energy detection threshold values ​​based on a network status, and including the plurality of energy detection threshold values ​​in a first signaling; and generating, for the second cell, an energy detection threshold indication for indicating one of the plurality of energy detection threshold values, so that a user equipment performs energy detection on an unauthorized frequency band corresponding to the second cell based on the energy detection threshold indication, and including the energy detection threshold indication in a second signaling, wherein a transmission interval of the first signaling is longer than a transmission interval of the second signaling.

[0016] According to another aspect of the present disclosure, a method for performing wireless communications in a wireless communication system is provided, wherein there is a first cell and at least one second cell in the wireless communication system, and at least one of the second cells is a second cell operating in an unlicensed frequency band, and the method comprises: receiving a first signaling from a base station providing services for the user equipment, the first signaling comprising a plurality of energy detection threshold values; receiving a second signaling from the base station, the second signaling comprising an energy detection threshold indication for indicating one of the plurality of energy detection threshold values; and performing energy detection on the unlicensed frequency band based on the energy detection threshold indication, wherein a transmission interval of the first signaling is longer than a transmission interval of the second signaling.

[0017] By using the electronic device in the wireless communication system and the method for wireless communication in the wireless communication system according to the present disclosure, energy detection threshold information can be dynamically or semi-statically generated for the second cell operating in the unlicensed frequency band. Based on the dynamically or semi-statically changing energy detection threshold information, the user equipment can perform energy detection on the unlicensed frequency band. When the energy of the unlicensed frequency band detected by the user equipment is lower than the energy detection threshold, the user equipment can use the second cell operating in the unlicensed frequency band for transmission. Otherwise, the user equipment cannot use the second cell operating in the unlicensed frequency band for transmission. In this way, by designing a reasonable dynamic adjustment mechanism of the energy detection threshold, the use of unlicensed spectrum can be optimized.

[0018] Further areas of applicability will become apparent from the description provided herein.The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure. In the drawings:

[0020] Figure 1 is a block diagram illustrating a structure of an electronic device in a wireless communication system according to an embodiment of the present disclosure;

[0021] Figure 2A is a schematic diagram illustrating a format of DCI (Downlink Control Information) format 1C specified for dynamic energy detection threshold adjustment;

[0022] Figure 2B is a schematic diagram illustrating an energy detection threshold MAC control unit;

[0023] Figure 3 is a schematic diagram illustrating a mapping relationship between an indication of an energy detection threshold and a value of the energy detection threshold;

[0024] Figure 4 A schematic diagram illustrating a fast energy detection threshold adjustment scheme according to an embodiment of the present disclosure is shown;

[0025] Figure 5 is a timing diagram illustrating a fast energy detection threshold adjustment scheme according to an embodiment of the present disclosure;

[0026] Figure 6 is a schematic diagram illustrating a hidden node scenario to which a fast energy detection threshold adjustment scheme according to an embodiment of the present disclosure may be applied;

[0027] Figure 7 is a timing diagram illustrating application of a fast energy detection threshold adjustment scheme according to an embodiment of the present disclosure in a hidden node scenario;

[0028] Figure 8 is a block diagram of a structure of a user equipment in a wireless communication system according to an embodiment of the present disclosure;

[0029] Fig. 9 is a block diagram of a structure of a base station in a wireless communication system according to an embodiment of the present disclosure;

[0030] Fig.10 is a block diagram showing a first example of a schematic configuration of an eNB (evolution Node Base Station) applicable to the present disclosure;

[0031] Fig.11 is a block diagram showing a second example of a schematic configuration of an eNB applicable to the present disclosure;

[0032] Fig.12 is a block diagram showing an example of a schematic configuration of a smartphone applicable to the present disclosure; and

[0033] Fig.13 is a block diagram showing an example of a schematic configuration of a car navigation device applicable to the present disclosure.

[0034] Although the present disclosure is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown as examples in the drawings and are described in detail herein. It should be understood, however, that the description of specific embodiments herein is not intended to limit the present disclosure to the specific forms disclosed, but rather, the present disclosure is intended to cover all modifications, equivalents, and alternatives that fall within the spirit and scope of the present disclosure. It should be noted that throughout the several drawings, corresponding reference numerals indicate corresponding parts. DETAILED DESCRIPTION

[0035] Examples of the present disclosure will now be described more fully with reference to the accompanying drawings.The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses.

[0036] Example embodiments are provided so that the disclosure will be exhaustive and its scope will be fully conveyed to those skilled in the art. Numerous specific details such as examples of specific components, devices and methods are set forth to provide a detailed understanding of the embodiments of the present disclosure. It will be apparent to those skilled in the art that the example embodiments may be implemented in many different forms without the use of specific details, none of which should be construed as limiting the scope of the present disclosure. In certain example embodiments, well-known processes, well-known structures and well-known techniques are not described in detail.

[0037] The UE (User Equipment) involved in the present disclosure includes but is not limited to terminals with wireless communication functions such as mobile terminals, computers, and vehicle-mounted equipment. Further, depending on the specific functions described, the UE involved in the present disclosure may also be the UE itself or a component thereof such as a chip. In addition, similarly, the base station involved in the present disclosure may be, for example, an eNB (evolution Node Base Station) or a component such as a chip in an eNB.

[0038] The present disclosure relates to LAA (Licensed Assisted Access)-LTE (Long Term Evolution) communication in a wireless communication network. In the case where multiple systems use the same unlicensed frequency band, coordination is required to enable each system to have equal rights to use the unlicensed frequency band. Here, the unlicensed frequency band may be, for example, a licensed frequency band of a non-cellular network such as a WiFi frequency band of 2.4 GHz or 5 GHz, a TV frequency band, or a radar frequency band. In order to achieve such coordination on the basis of reducing the communication overhead between systems, the present disclosure proposes a dynamic adjustment mechanism for the terminal energy detection threshold, which can also reduce the adverse effects caused by the uncertainty of the occupancy of the unlicensed frequency band. For example, the LTE system can dynamically adjust the energy detection threshold according to the interference status and load status of the available unlicensed spectrum and notify the user equipment in a timely manner, thereby effectively utilizing the unlicensed frequency band and coexisting fairly with other communication devices that utilize the unlicensed frequency band. In particular, the present disclosure also proposes a variety of specific schemes to realize the dynamic notification of the energy detection threshold. The scenarios for coordinated use of unlicensed frequency band resources in the present disclosure may include, for example, coordination between LTE systems and WiFi systems, coordination between LTE systems and Bluetooth systems, coordination between the same system across LTE operators, and coordination between multiple communication devices served by the same LTE operator.

[0039] Figure 1 A structure of an electronic device 100 in a wireless communication system according to an embodiment of the present disclosure is illustrated.

[0040] like Figure 1 As shown, the electronic device 100 may include a processing circuit 110. It should be noted that the electronic device 100 may include one processing circuit 110 or multiple processing circuits 110. In addition, the electronic device 100 may also include a communication unit 120, etc. The electronic device 100 is arranged on the network side of the wireless communication system to serve the user equipment in the system.

[0041] Furthermore, the processing circuit 110 may include various discrete functional units to perform various functions and / or operations. It should be noted that these functional units may be physical entities or logical entities, and units with different names may be implemented by the same physical entity.

[0042] For example, Figure 1 As shown, the processing circuit 110 may include a configuration unit 111 and a generation unit 112 .

[0043] In a wireless communication system according to an embodiment of the present disclosure, there may be at least one first cell and at least one second cell, and at least one of the second cells is a second cell operating in an unlicensed frequency band. The first cell and the second cell are both managed by the electronic device 100. The configuration unit 112 configures at least one second cell operating in an unlicensed frequency band for the user equipment to perform carrier aggregation communication.

[0044] According to an example of the present disclosure, the user equipment obtains wireless transmission services through a general carrier aggregation method of a primary cell (Pcell) plus one or more secondary cells (Scell) based on the configuration of the network side. For example, the configuration unit 112 of the electronic device 100 generates high-level signaling containing configuration information of the secondary cell, such as RRC signaling containing an sCellToAddModListIE information unit, for the user equipment to determine its available secondary cells. The configuration information of the secondary cell includes cell configurations such as cell index, physical cell ID, and carrier frequency. In this case, the first cell mentioned above refers to the Pcell, and the second cell refers to the Scell. Generally, each cell corresponds to a carrier at a specific frequency, for example, the Pcell corresponds to the primary component carrier (PCC), and the Scell ​​corresponds to the secondary component carrier (SCC). Therefore, in some of the following examples, the applicant does not carefully distinguish between the names of cells and carriers, and those skilled in the art can understand their meanings.

[0045] In another example of the present disclosure, the user equipment operates in a DC (dual connectivity) scenario. In the DC scenario, the UE is connected to two eNBs (primary eNB and secondary eNB) at the same time, and its service cells include MCG (Master Cell Group) and SCG (Secondary Cell Group), respectively. Among them, MCG includes a Pcell and one or more Scells, and SCG includes a PSCell (that is, the main cell in the secondary cell group) and optionally one or more Scells. In the DC example, PSCell can also be an example of the first cell mentioned above, and can carry detection threshold indications of other Scells in the SCG.

[0046] In addition, in another example of the present disclosure, the Scell ​​serving the user equipment includes a Scell ​​operating in a licensed frequency band, and when the licensed frequency band Scell ​​is configured with PDCCH (Physical Downlink Control Channel) transmission, the Scell ​​can also be used to transmit a detection threshold for an unlicensed Scell. In other words, in this case, the first cell mentioned above can also be a Scell.

[0047] In the following, general carrier aggregation will be described as an example, that is, the following description will be made in a manner where the Pcell is used as the first cell and the Scell ​​is used as the second cell.

[0048] In such Figure 1 In the electronic device 100 shown, for each second cell operating in the unlicensed frequency band, the generating unit 112 can dynamically or semi-statically generate energy detection threshold information, so that the UE can perform energy detection on the unlicensed frequency band based on the energy detection threshold information.

[0049] Using the electronic device 100 according to an embodiment of the present disclosure, energy detection threshold information can be dynamically or semi-statically generated for each second cell operating in the unlicensed frequency band. Based on the dynamically or semi-statically changing energy detection threshold information, the UE can perform energy detection on the unlicensed frequency band.

[0050] When the energy of the unlicensed frequency band detected by the UE is lower than the energy detection threshold, the UE can assume that no other device is transmitting on the unlicensed frequency band, or that transmission on the unlicensed frequency band will not cause harmful interference to other devices, and thus the UE can use the second cell working on the unlicensed frequency band for transmission. Otherwise, the UE cannot use the second cell working on the unlicensed frequency band for transmission. In this way, by dynamically or semi-statically adjusting the energy detection threshold for each second cell in a centralized manner on the network side, on the one hand, compared with a static or unified energy detection threshold solution for each cell, the detection accuracy and system spectrum utilization efficiency can be improved; on the other hand, compared with the solution of determining the energy detection threshold on the UE side, the complexity and energy consumption of the UE can be reduced, and it is not subject to the individual limitations of the UE. The solution of determining the energy detection threshold on the network side can take into account both fairness and efficiency.

[0051] However, how to effectively notify the UE side after the network side adjusts the energy detection threshold is another technical issue worthy of study. According to a preferred embodiment of the present disclosure, the processing circuit 110 can generate a physical layer control signaling containing energy detection threshold indications of each unauthorized second cell, such as DCI (Downlink Control Information) carried by PDCCH. Taking into account the transmission cycle of the physical layer signaling, the processing circuit 110 can thereby realize dynamic notification of the energy detection threshold. However, since the physical layer control signaling is transmitted very frequently in the network, the transmission resource overhead occupied is large, and the number of bits carried thereon is strictly limited, in the case where it is necessary to notify the UE of the energy detection thresholds of multiple unauthorized second cells, the inventor of the present disclosure further provides the following preferred solution to include all energy detection threshold indications in the limited physical layer control signaling, that is, reuse DCI format 1C to include the energy detection threshold information in DCI format 1C to notify the UE.

[0052] In 3GPP (3rd Generation Partnership Project) Rel-12, DCI format 1C is used for very compact scheduling of one PDSCH (Physical Downlink Shared Channel) codeword, which notifies MCCH (Multicast Control Channel) changes and reconfigures TDD (Time Division Duplexing).

[0053] If DCI format 1C is used for UL (Uplink) / DL (Downlink) configuration indication, the following information is transmitted with the help of DCI format 1C:

[0054] UL / DL configuration number 1, UL / DL configuration number 2, ..., UL / DL configuration number I

[0055] Each UL / DL configuration occupies 3 bits. L format 1c =Equal to the payload size of format 1C for very compact scheduling of one PDSCH codeword. The parameter eimta-ReConfigIndex provided by higher layers determines the index for the UL / DL configuration indication for the serving cell. Add zeros until its size is equal to the size of format 1C for very compact scheduling of one PDSCH codeword.

[0056] In Rel-12, the TDD configuration on each carrier (licensed band) can be changed dynamically through DCI format 1C. However, on unlicensed bands, due to the time limit of the LTE system occupying the unlicensed band and the existence of incomplete subframes, dynamically changing the TDD configuration may not necessarily improve the system performance, and the information bit resources carrying this part of the content may be wasted.

[0057] Therefore, the present disclosure dynamically adjusts the energy detection threshold value by reusing DCI format 1C, thereby achieving effective notification of the energy detection threshold without adding new information bits and maintaining the original signaling structure.

[0058] According to a preferred embodiment of the present disclosure, the processing circuit 110 may reuse the bits in the DCI format 1C for indicating the uplink and downlink configuration of the second cell as an indication of an energy detection threshold when the second cell operating in the unlicensed frequency band performs energy detection. Here, the indication of the energy detection threshold may be, for example, an index such as a sequence number.

[0059] Figure 2A An example of the format of DCI format 1C specified for dynamic energy detection threshold adjustment is shown.

[0060] like Figure 2A As shown, in the general carrier aggregation example, after reusing DCI format 1C signaling, the meaning of each bit is as follows:

[0061] Bits 0-2 indicate the TDD configuration of the Pcell (7 types);

[0062] Bits 3-5 indicate an indication ED1 of an energy detection threshold when the UE of Scell-1 performs energy detection;

[0063] Bits 6-8 indicate an indication ED2 of an energy detection threshold when the UE of Scell-2 performs energy detection;

[0064] Bits 9-11 indicate an indication ED3 of an energy detection threshold when the UE of Scell-3 performs energy detection; and

[0065] Bits 12-14 indicate an indication ED4 of an energy detection threshold when the UE of Scell-4 performs energy detection.

[0066] It should be noted that, as described above, dynamic TDD UL / DL configuration is not required when the Scell ​​operates in an unlicensed band. In some examples, some of the multiple Scells configured by the UE operate in an unlicensed band, while others operate in a licensed band. For the Scells operating in the licensed band, similar to the case of the Pcell, the corresponding bits in the DCI format 1C are still used to indicate the UL / DL configuration. In other words, only the indication bits for some Scells in the DCI format 1C may be changed.

[0067] Through Figure 2A The reuse of DCI format 1C shown can realize dynamic generation of energy detection threshold information. It should be noted that the present disclosure also provides an optional example, in which the padding bits in DCI format 1C are reused to carry energy detection threshold information, and the meaning of the TDD UL / DL configuration indication bits may not be changed. In one example, starting from a specific position in the padding bits (e.g., specified by the protocol), the energy detection threshold indications of multiple second cells are arranged in a predetermined order, for example, in ascending order of the cell index, so that the UE can confirm the energy detection threshold of each second cell based on the previous second cell configuration information.

[0068] According to a preferred embodiment of the present disclosure, the processing circuit 110 may also include the energy detection threshold information in a MAC (Media Access Control) signaling to notify the UE. Considering the transmission cycle of the MAC signaling, the processing circuit 110 may thereby semi-statically generate the energy detection threshold information.

[0069] For example, the energy detection threshold MAC control unit can be identified by a MAC PDU (Protocol Data Unit) subheader with a specific LCID (Logical Channel Identity). For example, one of the indexes in the range of 01011 to 11001 is selected as the LCID value of the energy detection threshold MAC control unit. When the UE receives the MAC signaling, the LCID contained in the subheader in the MAC PDU is detected to determine whether the MAC control unit corresponding to the subheader indicates the energy detection threshold. Figure 2B An example of an energy detection threshold MAC control unit is shown.

[0070] like Figure 2B The Energy Detect Threshold MAC control element shown has a fixed size and consists of two octets (Oct1 and Oct2). Figure 2BIn the field, R represents a reserved bit, which is set to "0". The length of the field indicating the energy detection threshold of each Scell ​​is 3 bits.

[0071] According to a preferred embodiment of the present disclosure, the processing circuit 110 may also include the energy detection threshold information in the RRC (Radio Resource Control) signaling to notify the UE. Considering the transmission period of the RRC signaling, the processing circuit 110 can thereby realize semi-static generation of the energy detection threshold information. It should be noted that the energy detection threshold information included in the RRC signaling can be either an indication of the energy detection threshold (e.g., the 3-bit index in the above example) or a specific value of the specific energy detection threshold (e.g., x dBm).

[0072] For example, a new RRC signaling, namely, the LAA energy detection threshold information unit, may be defined in RadioResourceConfigCommonSIB. For example, the following format may be used:

[0073] Format:energy detection threshold INTEGER(-92..-60)dBm

[0074] According to an embodiment of the present disclosure, the energy detection threshold information may include the value of the energy detection threshold. However, preferably, the energy detection threshold information may include an indication of the energy detection threshold for a second cell operating in an unlicensed frequency band. In the case where the energy detection threshold information includes an indication of the energy detection threshold, before generating the energy detection threshold information, the processing circuit 110 may include the values ​​of multiple candidate energy detection thresholds in a dedicated signaling to notify the UE. Thereby, the UE first obtains the values ​​of multiple candidate energy detection thresholds and the indexes corresponding to each value through a dedicated signaling (or a subsequent broadcast signaling), and then receives an indication of the index containing the energy detection threshold value through a subsequent physical layer signaling or MAC signaling, so as to query and determine the energy detection threshold values ​​of each current unlicensed frequency band Scell. In another example, the values ​​of multiple candidate energy detection thresholds and the corresponding indexes are preset parameters of the system, and are pre-stored in a processing chip (specifically, for example, a storage unit) of the UE, and the UE can also directly determine the values ​​of the energy detection thresholds of each cell after receiving the energy detection threshold indication.

[0075] In particular, the processing circuit 110 may include multiple candidate energy detection threshold values ​​in the RRC signaling to notify the UE. Compared with the scheme of notifying the specific energy detection threshold value each time, this can have reduced transmission resource overhead. Compared with the scheme of pre-writing the candidate energy detection threshold value in the chip, the notification method of dedicated signaling can have higher flexibility and adapt to changes in the specific system working state. Compared with the broadcast method mentioned below, the network side can set different candidate energy detection threshold values ​​for different UEs under the notification method of dedicated signaling, thereby realizing differentiated services. For example, UEs can be divided into high-priority UEs and low-priority UEs according to priority, and the processing circuit 110 can set the candidate energy detection threshold value of the high-priority UE to be higher than that of the low-priority UE, so that the high-priority UE can more easily access the Scell ​​on the unlicensed frequency band. High and low priorities are divided, for example, according to factors such as the service type and geographical location of the UE, and the present disclosure does not give examples one by one.

[0076] In addition, the value of the candidate energy detection threshold can also be broadcast in a broadcast message. For example, the value of the candidate energy detection threshold can be notified to the UE through the system information broadcast carried by the BCCH (Broadcast Control Channel). Compared with other candidate energy detection threshold value notification methods, broadcasting can not only meet the system flexibility requirements to a certain extent, but also realize the notification of the candidate energy detection threshold value of the UE within the entire cell range with less wireless resource overhead.

[0077] Figure 3 The mapping relationship between the indication of the energy detection threshold and the value of the energy detection threshold is shown. Figure 3 As shown in the figure, the 3 bits of data on the left represent the indication of the energy detection threshold carried by PDCCH format 1C, MAC CE (control unit), etc., and the specific decibel number on the right is the value of the energy detection threshold predefined on the UE side or in the higher layer (RRC / MAC). When the indication of the energy detection threshold is received, refer to Figure 3 According to the mapping table shown, the UE can obtain a specific value of the energy detection threshold.

[0078] Figure 4 An example of a fast energy detection threshold adjustment scheme according to an embodiment of the present disclosure is shown. Figure 4As shown, the primary cell Pcell operating in the licensed frequency band can carry the following information in PDCCH format 1C: TDD configuration of Pcell; ED (Energy Detection) threshold 1 of the first secondary cell Scell ​​1 operating in the unlicensed frequency band; ED threshold 2 of the second secondary cell Scell ​​2 operating in the unlicensed frequency band; ED threshold 3 of the third secondary cell Scell3 operating in the unlicensed frequency band; and ED threshold 4 of the fourth secondary cell Scell ​​4 operating in the unlicensed frequency band. Next, Scell ​​1 operating in the unlicensed frequency band can use ED threshold 1 for energy detection. The detected signal energy level is unavailable if it is higher than ED threshold 1, and available if it is lower than ED threshold 1. If Scell ​​1 is still available after the delay period, data can be uploaded.

[0079] Similarly, Scell ​​2, Scell ​​3 and Scell ​​4 operating in the unlicensed frequency band can respectively perform energy detection using ED threshold 2, ED threshold 3 and ED threshold 4. If these secondary cells are still available after the delay period, data can be uploaded.

[0080] It should be noted that in Figure 4 The energy detection before uplink transmission is mainly described as an example. However, before the network side uses the Scell ​​in the unlicensed frequency band for downlink transmission, the UE can also be configured to perform energy detection in the manner of the present invention, and the downlink transmission scheme can be determined based on the UE's feedback on the detection result.

[0081] According to a preferred embodiment of the present disclosure, the processing circuit 110 may generate energy detection threshold information based on the service load and / or the channel idle probability of the unlicensed frequency band.

[0082] For example, the processing circuit 110 may generate energy detection threshold information based on the traffic load on the unlicensed frequency band. If the traffic load on the unlicensed frequency band is high, the processing circuit 110 may set the energy detection threshold to be relatively low, thereby reducing the load on the unlicensed frequency band.

[0083] On the other hand, the processing circuit 110 may also generate energy detection threshold information based on the traffic load on the licensed frequency band. If the traffic load on the licensed frequency band is high, the processing circuit 110 may set the energy detection threshold relatively high, so that the unlicensed frequency band may be more likely to participate in traffic load offloading.

[0084] In addition, the processing circuit 110 may also generate energy detection threshold information based on the channel idle probability (statistical information) of the unlicensed frequency band. If the channel idle probability of the unlicensed frequency band is high, the processing circuit 110 may set the energy detection threshold to be relatively high, so that the unlicensed frequency band may be more likely to participate in channel transmission.

[0085] Of course, the processing circuit 110 may also comprehensively consider the service load and the channel idle probability of the unlicensed frequency band to generate the energy detection threshold information.

[0086] According to a preferred embodiment of the present disclosure, the processing circuit 110 (e.g., the generating unit 112 therein) may generate energy detection threshold information based on energy detection threshold indication information received from other electronic devices. For example, in order to fairly use the unlicensed frequency band, the thresholds set by each eNB may be set to the same or similar values.

[0087] It should be noted that, according to an embodiment of the present disclosure, the wireless communication system described above may be an LTE-A (Long Term Evolution-Advanced) cellular communication system, the electronic device 100 may be a base station, and the electronic device 100 may further include a communication unit 120 such as a transceiver, etc. The communication unit 120 may, for example, transmit energy detection threshold information via an air interface.

[0088] According to a preferred embodiment of the present disclosure, the first cell operates in an authorized frequency band, and the transceiver included in the electronic device 100 can transmit energy detection threshold information through the first cell.

[0089] Next, combine Figure 5 To describe the process of the energy detection threshold adjustment method under LAA according to an embodiment of the present disclosure. Figure 5 A timing diagram of a fast energy detection threshold adjustment scheme according to an embodiment of the present disclosure is shown.

[0090] like Figure 5 As shown, first, the eNB configures the signaling supporting LAA through RRC, and based on this signaling, the UE determines to interpret the DCI format 1c in the PDCCH in the manner disclosed in the present invention.

[0091] Specifically, a dedicated RRC IE (Information Element) such as LAA-MainConfig may be used for indication.

[0092] More specifically, the existing RRCConnectionReconfiguration message can be used for indication, and the content of the message is as follows. The dl-CarrierFreq indicates the downlink carrier frequency of the secondary cell (in an FDD (Frequency Division Duplexing) system with uplink and downlink asymmetry, ul-CarrierFreq can also be included to indicate the uplink carrier frequency). This RRCConnectionReconfiguration message is sent when the base station adds a scell to the UE for carrier aggregation. The UE can determine whether the specific secondary cell is an LAA cell (the operating frequency is on the unlicensed band) by reading the carrier frequency indication in the message.

[0093] RRCConnectionReconfiguration message

[0094]

[0095] Next, the eNB configures the signaling eIMTA-MainConfig to support eIMTA (enhanced Interference Mitigation and Traffic Adaptation) through RRC. It is also based on this signaling that the UE determines to interpret the DCI format 1c in the PDCCH in the manner disclosed in the present invention. The content of the signaling is as follows.

[0096]

[0097] Among them, eimta-CommandPeriodicity is used to configure the period to monitor the PDCCH scrambled by eIMTA-RNTI (Radio Network Temporary Identifier) ​​(see TS36.213). The value sf10 corresponds to 10 subframes, sf20 corresponds to 20 subframes, and so on.

[0098] In addition, eimta-CommandSubframeSet is used to configure the subframes to monitor the PDCCH scrambled by eIMTA-RNTI within the period configured by eimta-CommandPeriodicity. 10 bits correspond to all subframes in the last radio frame within each period.

[0099] Next, by monitoring and decoding the PDCCH scrambled by the eIMTA-RNTI on the TDD / FDD Pcell, the UE can obtain the energy detection threshold of each Scell ​​operating in the unlicensed frequency band.

[0100] Next, if the UE has uplink data to send in the unlicensed frequency band, for example, the UE may send an uplink transmission scheduling request (SR) to the eNB, and the eNB needs to send an uplink grant signaling (UL grant) to the UE.

[0101] Next, after receiving the uplink grant, the UE performs energy detection using the energy detection threshold carried in PDCCH format 1C, and if frequency resources are still available in the unlicensed frequency band after the delay period, uplink data transmission is performed.

[0102] According to Figure 5 In the process shown, the UE can determine whether the Scell ​​operating in the unlicensed frequency band is available according to the threshold detection before performing uplink transmission on the Scell. On the other hand, the base station can also use the UE to detect whether the downlink resources are available to discover hidden nodes that cannot be detected on the base station side.

[0103] Figure 6 FIG. 4 shows a hidden node scenario in which the fast energy detection threshold adjustment scheme according to an embodiment of the present disclosure can be applied. Figure 6 In the scenario shown, base station 1 is using an unlicensed frequency band, and base station 2 usually detects interference before performing LAA downlink transmission, but may not detect interference (base station 1 is a hidden node). In this way, when base station 2 and base station 1 use the same frequency band for transmission, it will cause serious interference to edge users of base stations 1 and 2, such as UE3 and UE2.

[0104] Taking this situation into consideration, before using the unlicensed frequency band, base station 2 can also configure user equipment at the cell edge such as UE3 to perform energy detection according to the above-mentioned technical solution disclosed in the present invention, and determine whether to use the unlicensed frequency band or which unlicensed frequency bands to use based on the detection report of UE3.

[0105] According to a preferred embodiment of the present disclosure, in response to an energy detection report from a UE, the processing circuit 110 may determine whether to perform downlink transmission using a second cell operating in an unlicensed frequency band.

[0106] Figure 7 A timing diagram of applying a fast energy detection threshold adjustment solution according to an embodiment of the present disclosure in a hidden node scenario is shown.

[0107] exist Figure 7 In, as Figure 5The process shown is similar. First, the eNB supports LAA signaling LAA-MainConfig through RRC configuration.

[0108] Next, the eNB configures the signaling eIMTA-MainConfig to support eIMTA through RRC.

[0109] Next, the eNB transmits PDCCH format 1C on the Pcell to inform the UE of the energy detection threshold information.

[0110] Next, the eNB transmits a hidden node detection request on the Pcell. After receiving the hidden node detection request, the UE performs energy detection using the energy detection threshold value carried by the PDCCH format 1C.

[0111] After that, the UE reports the detection report to the eNB on the Pcell.

[0112] Next, a user equipment in a wireless communication system is described in detail. Figure 8 The structure of a user equipment 800 in a wireless communication system according to an embodiment of the present disclosure is illustrated. Similarly, in the wireless communication system, there is at least one first cell and at least one second cell, at least one of the second cells is a second cell operating in an unlicensed frequency band.

[0113] like Figure 8 As shown, the user equipment 800 may include a processing circuit 810. It should be noted that the user equipment 800 may include one processing circuit 810 or multiple processing circuits 810. In addition, the user equipment 800 may also include a communication unit 820 such as a transceiver.

[0114] As mentioned above, similarly, the processing circuit 810 may also include various discrete functional units to perform various functions and / or operations. These functional units may be physical entities or logical entities, and units with different names may be implemented by the same physical entity.

[0115] For example, Figure 8 As shown, the processing circuit 810 may include an energy detection unit 811 .

[0116] The communication unit 820 may receive configuration information of at least one second cell operating in an unlicensed frequency band for carrier aggregation, and receive energy detection threshold information for each second cell operating in the unlicensed frequency band.

[0117] Further, the energy detection unit 811 may perform energy detection on the unlicensed frequency bands respectively based on the energy detection threshold information.

[0118] Preferably, the processing circuit 810 may decode the DCI format 1C received by the communication unit 820 to extract the energy detection threshold information.

[0119] Preferably, the processing circuit 810 may decode the MAC signaling received by the communication unit 820 to extract the energy detection threshold information.

[0120] Preferably, the processing circuit 810 may decode the RRC signaling received by the communication unit 820 to extract the energy detection threshold information.

[0121] According to a preferred embodiment of the present disclosure, the user equipment 800 may further include a memory (not shown). The energy detection threshold information may include an indication of an energy detection threshold for a second cell operating in an unlicensed frequency band. The processing circuit 810 may decode the RRC signaling received in advance by the communication unit 820 to extract multiple candidate energy detection threshold values, and may store the multiple candidate energy detection threshold values ​​in the memory.

[0122] Preferably, the communication unit 820 can also receive uplink transmission authorization information on a second cell operating in an unlicensed frequency band, and can perform uplink transmission when an energy detection result of the second cell operating in the unlicensed frequency band shows that the unlicensed frequency band is idle.

[0123] Preferably, the communication unit 820 may send the energy detection result of the processing circuit 810 to a base station in the wireless communication system that provides services for the user equipment 800 .

[0124] The electronic device (user equipment) in the wireless communication system according to the embodiment of the present disclosure has been described above. Fig. 9 A base station in a wireless communication system according to another embodiment of the present disclosure is further described. Fig. 9 The diagram illustrates a structure of a base station 900 in a wireless communication system according to another embodiment of the present disclosure.

[0125] The base station 900 can manage a first cell and a second cell, wherein the first cell operates in a licensed frequency band, and the second cell operates in an unlicensed frequency band.

[0126] like Fig. 9 As shown, the base station 900 may include a processing circuit 910. It should be noted that the base station 900 may include one processing circuit 910 or multiple processing circuits 910. In addition, the base station 900 may also include a communication unit 920 such as a transceiver.

[0127] As mentioned above, similarly, the processing circuit 910 may also include various discrete functional units to perform various functions and / or operations. These functional units may be physical entities or logical entities, and units with different names may be implemented by the same physical entity.

[0128] For example, Fig. 9 As shown, the processing circuit 910 may include generating units 911 and 912 .

[0129] The generating unit 911 may generate a plurality of energy detection threshold values ​​based on the network state, and include the plurality of energy detection threshold values ​​in the first signaling. The first signaling here may be a high-layer signaling such as RRC.

[0130] The generating unit 912 may generate an energy detection threshold indication for indicating one of the multiple energy detection threshold values ​​for the second cell, so that the UE performs energy detection on the unlicensed frequency band corresponding to the second cell based on the energy detection threshold indication. The generating unit 912 may also include the energy detection threshold indication in the second signaling. The second signaling here may be, for example, physical layer signaling (DCI in PDCCH) or MAC layer signaling.

[0131] It should be emphasized that the transmission interval of the first signaling is longer than the transmission interval of the second signaling.

[0132] Use as Fig. 9 The base station 900 shown can send multiple energy detection threshold values ​​through a first signaling with a longer transmission interval, and can send an energy detection threshold indication for indicating one of the multiple energy detection threshold values ​​through a second signaling with a shorter transmission interval. In this way, the transmission resource overhead can be reduced, and higher flexibility can be provided to adapt to changes in the working state of a specific system. In this way, the situation where multiple systems use the same unlicensed frequency band can also be coordinated, the use of unlicensed spectrum can be optimized, and each system can have equal rights to use the unlicensed frequency band.

[0133] With Fig. 9 Corresponding to the base station 900 shown, according to another embodiment of the present disclosure, a user equipment in a wireless communication system can also be provided. Similarly, in the wireless communication system, there is a first cell and at least one second cell, at least one of the second cells is a second cell operating in an unlicensed frequency band.

[0134] The user equipment may also include a processing circuit. It should be noted that the user equipment may include one processing circuit or multiple processing circuits. In addition, the user equipment may also include a communication unit such as a transceiver.

[0135] As mentioned above, similarly, the processing circuit may also include various discrete functional units to perform various functions and / or operations. These functional units may be physical entities or logical entities, and units with different names may be implemented by the same physical entity.

[0136] For example, the processing circuit may include an energy detection unit.

[0137] The processing circuit can enable the communication unit to receive first signaling from a base station providing services for user equipment, where the first signaling includes multiple energy detection threshold values.

[0138] Further, the processing circuit may enable the communication unit to receive second signaling from the base station, where the second signaling includes an energy detection threshold indication for indicating one of a plurality of energy detection threshold values.

[0139] Furthermore, the energy detection unit included in the processing circuit can perform energy detection on the unlicensed frequency band based on the energy detection threshold indication.

[0140] It is also emphasized that the transmission interval of the first signaling is longer than the transmission interval of the second signaling.

[0141] Next, a method for performing wireless communication in a wireless communication system according to an embodiment of the present disclosure is described. Similarly, in the wireless communication system, there are at least one first cell and at least one second cell, and at least one of the second cells is a second cell operating in an unlicensed frequency band. The method may include: configuring at least one second cell operating in an unlicensed frequency band for a user device to perform carrier aggregation communication; and for each second cell operating in an unlicensed frequency band, dynamically or semi-statically generating energy detection threshold information, so that the user device performs energy detection on the unlicensed frequency band based on the energy detection threshold information.

[0142] Preferably, the method may further include: reusing DCI format 1C to include energy detection threshold information in DCI format 1C to notify the user equipment.

[0143] Preferably, the method may further include: reusing the bit used to indicate the uplink and downlink configuration of the second cell in the DCI format 1C as an indication of an energy detection threshold when the second cell operating in the unlicensed frequency band performs energy detection.

[0144] Preferably, the method may further include: including energy detection threshold information in MAC signaling to notify user equipment.

[0145] Preferably, the method may further include: including the energy detection threshold information in RRC signaling to notify the user equipment.

[0146] Preferably, the energy detection threshold information may include an indication of an energy detection threshold for a second cell operating in an unlicensed frequency band, and the method may further include: before generating the energy detection threshold information, including values ​​of multiple candidate energy detection thresholds in dedicated signaling to notify user equipment.

[0147] Preferably, the method may further include: generating energy detection threshold information based on the service load and / or the channel idle probability of the unlicensed frequency band.

[0148] Preferably, the method may further include: generating energy detection threshold information based on energy detection threshold indication information received from other electronic devices.

[0149] Preferably, the method may further include: in response to an energy detection report from the user equipment, determining whether to utilize a second cell operating in an unlicensed frequency band for downlink transmission.

[0150] Preferably, the first cell operates in an authorized frequency band, and the energy detection threshold information can be transmitted through the first cell.

[0151] On the other hand, according to another embodiment of the present disclosure, a method for performing wireless communication in a wireless communication system may include: receiving configuration information of at least one second cell operating in an unlicensed frequency band for carrier aggregation; receiving energy detection threshold information for each second cell operating in an unlicensed frequency band; and performing energy detection on the unlicensed frequency bands based on the energy detection threshold information. Similarly, there are at least one first cell and at least one second cell in the wireless communication system, and at least one of the second cells is a second cell operating in an unlicensed frequency band.

[0152] Preferably, the method may further include: decoding the received DCI format 1C to extract energy detection threshold information.

[0153] Preferably, the method may further include: decoding the received MAC signaling to extract energy detection threshold information.

[0154] Preferably, the method may further include: decoding the received RRC signaling to extract energy detection threshold information.

[0155] Preferably, the energy detection threshold information may include an indication of an energy detection threshold for a second cell operating in an unlicensed frequency band, and the method may further include: decoding the previously received RRC signaling to extract multiple candidate energy detection threshold values, and storing the multiple candidate energy detection threshold values ​​in a memory included in the user equipment.

[0156] Preferably, the method may further include: receiving uplink transmission authorization information on a second cell operating in an unlicensed frequency band, and performing uplink transmission when an energy detection result of the second cell operating in the unlicensed frequency band indicates that the unlicensed frequency band is idle.

[0157] Preferably, the method may further include: sending the result of energy detection to a base station providing service for the user equipment in the wireless communication system.

[0158] On the other hand, according to another embodiment of the present disclosure, a method for performing wireless communication in a wireless communication system may include: generating multiple energy detection threshold values ​​based on a network state, and including the multiple energy detection threshold values ​​in a first signaling; and for a second cell, generating an energy detection threshold indication for indicating one of the multiple energy detection threshold values, so that a user equipment performs energy detection on an unlicensed frequency band corresponding to the second cell based on the energy detection threshold indication, and including the energy detection threshold indication in a second signaling, wherein the transmission interval of the first signaling is longer than the transmission interval of the second signaling. Here, a base station in a wireless communication system manages a first cell and a second cell, wherein the first cell operates in an authorized frequency band, and the second cell operates in an unlicensed frequency band.

[0159] On the other hand, according to another embodiment of the present disclosure, a method for performing wireless communication in a wireless communication system may include: receiving a first signaling from a base station providing services for a user equipment, wherein the first signaling includes multiple energy detection threshold values; receiving a second signaling from the base station, wherein the second signaling includes an energy detection threshold indication for indicating one of the multiple energy detection threshold values; and performing energy detection on the unlicensed frequency band based on the energy detection threshold indication, wherein the transmission interval of the first signaling is longer than the transmission interval of the second signaling. Here, there is a first cell and at least one second cell in the wireless communication system, and at least one of the second cells is a second cell operating in an unlicensed frequency band.

[0160] Various specific implementations of the above-mentioned steps of the method for performing wireless communication in a wireless communication system according to an embodiment of the present disclosure have been described in detail above and will not be repeated here.

[0161] The technology of the present disclosure can be applied to various products. For example, the base station mentioned in the present disclosure can be implemented as any type of evolved Node B (eNB), such as macro eNB and small eNB. Small eNB can be an eNB that covers a cell smaller than a macro cell, such as a pico eNB, a micro eNB, and a home (femto) eNB. Alternatively, the base station can be implemented as any other type of base station, such as a NodeB and a base transceiver station (BTS). The base station may include: a main body (also referred to as a base station device) configured to control wireless communications; and one or more remote radio heads (RRHs) arranged in a place different from the main body. In addition, the various types of terminals described below can all work as base stations by temporarily or semi-persistently performing base station functions.

[0162] For example, the UE mentioned in the present disclosure may be implemented as a mobile terminal (such as a smart phone, a tablet personal computer (PC), a notebook PC, a portable game terminal, a portable / dongle-type mobile router, and a digital camera) or a vehicle-mounted terminal (such as a car navigation device). The UE may also be implemented as a terminal that performs machine-to-machine (M2M) communication (also referred to as a machine type communication (MTC) terminal). In addition, the UE may be a wireless communication module (such as an integrated circuit module including a single chip) installed on each of the above-mentioned terminals.

[0163] Fig.10 1 is a block diagram showing a first example of a schematic configuration of an eNB to which the technology of the present disclosure can be applied. The eNB 1000 includes one or more antennas 1010 and a base station device 1020. The base station device 1020 and each antenna 1010 may be connected to each other via an RF cable.

[0164] Each of the antennas 1010 includes a single or multiple antenna elements (such as multiple antenna elements included in a multiple-input multiple-output (MIMO) antenna) and is used for the base station device 1020 to transmit and receive wireless signals. Fig.10 As shown, the eNB 1000 may include multiple antennas 1010. For example, the multiple antennas 1010 may be compatible with multiple frequency bands used by the eNB 1000. Fig.10 An example is shown in which the eNB 1000 includes a plurality of antennas 1010 , but the eNB 1000 may also include a single antenna 1010 .

[0165] The base station device 1020 includes a controller 1021 , a memory 1022 , a network interface 1023 , and a wireless communication interface 1025 .

[0166] The controller 1021 may be, for example, a CPU or a DSP, and operates various functions of the higher layers of the base station device 1020. For example, the controller 1021 generates a data packet based on the data in the signal processed by the wireless communication interface 1025, and transmits the generated packet via the network interface 1023. The controller 1021 may bundle data from a plurality of baseband processors to generate a bundled packet, and transmit the generated bundled packet. The controller 1021 may have a logical function to perform the following control: the control may be such as radio resource control, radio bearer control, mobility management, admission control, and scheduling. The control may be performed in conjunction with a nearby eNB or core network node. The memory 1022 includes a RAM and a ROM, and stores programs executed by the controller 1021 and various types of control data (such as a terminal list, transmission power data, and scheduling data).

[0167] The network interface 1023 is a communication interface for connecting the base station device 1020 to the core network 1024. The controller 1021 can communicate with the core network node or another eNB via the network interface 1023. In this case, the eNB 1000 and the core network node or other eNBs can be connected to each other through a logical interface (such as an S1 interface and an X2 interface). The network interface 1023 can also be a wired communication interface or a wireless communication interface for a wireless backhaul line. If the network interface 1023 is a wireless communication interface, the network interface 1023 can use a higher frequency band for wireless communication compared to the frequency band used by the wireless communication interface 1025.

[0168] The wireless communication interface 1025 supports any cellular communication scheme (such as long term evolution (LTE) and LTE-Advanced), and provides a wireless connection to a terminal located in a cell of the eNB 1000 via the antenna 1010. The wireless communication interface 1025 may generally include, for example, a baseband (BB) processor 1026 and an RF circuit 1027. The BB processor 1026 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and perform various types of signal processing of layers (such as L1, medium access control (MAC), radio link control (RLC), and packet data convergence protocol (PDCP)). Instead of the controller 1021, the BB processor 1026 may have a part or all of the above-mentioned logical functions. The BB processor 1026 may be a memory storing a communication control program, or a module including a processor configured to execute a program and related circuits. Updating the program may change the function of the BB processor 1026. The module may be a card or a blade inserted into a slot of the base station device 1020. Alternatively, the module may also be a chip mounted on a card or a blade. Meanwhile, the RF circuit 1027 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives a wireless signal via the antenna 1010 .

[0169] like Fig.10 As shown, the wireless communication interface 1025 may include multiple BB processors 1026. For example, the multiple BB processors 1026 may be compatible with multiple frequency bands used by the eNB 1000. Fig.10 As shown, the wireless communication interface 1025 may include multiple RF circuits 1027. For example, the multiple RF circuits 1027 may be compatible with multiple antenna elements. Fig.10 An example is shown in which the wireless communication interface 1025 includes a plurality of BB processors 1026 and a plurality of RF circuits 1027 , but the wireless communication interface 1025 may also include a single BB processor 1026 or a single RF circuit 1027 .

[0170] Fig.11 1 is a block diagram showing a second example of a schematic configuration of an eNB to which the technology of the present disclosure can be applied. The eNB 1130 includes one or more antennas 1140, a base station device 1150, and an RRH 1160. The RRH 1160 and each antenna 1140 can be connected to each other via an RF cable. The base station device 1150 and the RRH 1160 can be connected to each other via a high-speed line such as an optical fiber cable.

[0171] Each of the antennas 1140 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for the RRH 1160 to transmit and receive wireless signals. Fig.11 As shown, the eNB 1130 may include multiple antennas 1140. For example, the multiple antennas 1140 may be compatible with the multiple frequency bands used by the eNB 1130. Fig.11 An example is shown in which the eNB 1130 includes a plurality of antennas 1140 , but the eNB 1130 may also include a single antenna 1140 .

[0172] The base station device 1150 includes a controller 1151, a memory 1152, a network interface 1153, a wireless communication interface 1155, and a connection interface 1157. The controller 1151, the memory 1152, and the network interface 1153 are similar to the reference Fig.10 The controller 1021, memory 1022 and network interface 1023 described are the same.

[0173] The wireless communication interface 1155 supports any cellular communication scheme (such as LTE and LTE-Advanced), and provides wireless communication to a terminal located in a sector corresponding to the RRH 1160 via the RRH 1160 and the antenna 1140. The wireless communication interface 1155 may generally include, for example, a BB processor 1156. In addition to the BB processor 1156 being connected to the RF circuit 1164 of the RRH 1160 via the connection interface 1157, the BB processor 1156 is connected to the reference RF circuit 1164 of the RRH 1160. Fig.10 The same as the BB processor 1026 described above. Fig.11 As shown, the wireless communication interface 1155 may include multiple BB processors 1156. For example, the multiple BB processors 1156 may be compatible with multiple frequency bands used by the eNB 1130. Fig.11 An example is shown in which the wireless communication interface 1155 includes a plurality of BB processors 1156 , but the wireless communication interface 1155 may also include a single BB processor 1156 .

[0174] The connection interface 1157 is an interface for connecting the base station device 1150 (wireless communication interface 1155) to the RRH 1160. The connection interface 1157 may also be a communication module for connecting the base station device 1150 (wireless communication interface 1155) to the RRH 1160 for communication in the above-mentioned high-speed line.

[0175] The RRH 1160 includes a connection interface 1161 and a wireless communication interface 1163 .

[0176] The connection interface 1161 is an interface for connecting the RRH 1160 (wireless communication interface 1163) to the base station device 1150. The connection interface 1161 may also be a communication module for communication in the above-mentioned high-speed line.

[0177] The wireless communication interface 1163 transmits and receives wireless signals via the antenna 1140. The wireless communication interface 1163 may generally include, for example, an RF circuit 1164. The RF circuit 1164 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives wireless signals via the antenna 1140. Fig.11 As shown, the wireless communication interface 1163 may include multiple RF circuits 1164. For example, the multiple RF circuits 1164 may support multiple antenna elements. Fig.11 An example is shown in which the wireless communication interface 1163 includes a plurality of RF circuits 1164 , but the wireless communication interface 1163 may also include a single RF circuit 1164 .

[0178] exist Fig.10 and Fig.11 In the eNB 1000 and eNB 1130 shown in FIG. Figure 1The processing circuit 110 and the configuration unit 111 and the generation unit 112 therein, and by using Fig. 9 The processing circuit 910 and the generating units 911 and 912 therein can be implemented by the controller 1021 and / or the controller 1151, and by using Figure 1 The communication unit 120 and the Fig. 9 The communication unit 920 described may be implemented by the wireless communication interface 1025 and the wireless communication interface 1155 and / or the wireless communication interface 1163. At least a portion of the functions may also be implemented by the controller 1021 and the controller 1151. For example, the controller 1021 and / or the controller 1151 may perform a cell configuration function operating in an unlicensed frequency band and an energy detection threshold information generation function by executing instructions stored in corresponding memories.

[0179] Fig.12 1 is a block diagram showing an example of a schematic configuration of a smartphone 1200 to which the technology of the present disclosure can be applied. The smartphone 1200 includes a processor 1201, a memory 1202, a storage device 1203, an external connection interface 1204, a camera device 1206, a sensor 1207, a microphone 1208, an input device 1209, a display device 1210, a speaker 1211, a wireless communication interface 1212, one or more antenna switches 1215, one or more antennas 1216, a bus 1217, a battery 1218, and an auxiliary controller 1219.

[0180] The processor 1201 may be, for example, a CPU or a system on chip (SoC), and controls the functions of the application layer and other layers of the smartphone 1200. The memory 1202 includes a RAM and a ROM, and stores data and programs executed by the processor 1201. The storage device 1203 may include a storage medium such as a semiconductor memory and a hard disk. The external connection interface 1204 is an interface for connecting an external device (such as a memory card and a universal serial bus (USB) device) to the smartphone 1200.

[0181] The camera device 1206 includes an image sensor such as a charge coupled device (CCD) and a complementary metal oxide semiconductor (CMOS), and generates a captured image. The sensor 1207 may include a group of sensors such as a measurement sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor. The microphone 1208 converts the sound input to the smart phone 1200 into an audio signal. The input device 1209 includes, for example, a touch sensor, a keypad, a keyboard, a button, or a switch configured to detect a touch on the screen of the display device 1210, and receives an operation or information input from a user. The display device 1210 includes a screen such as a liquid crystal display (LCD) and an organic light emitting diode (OLED) display, and displays an output image of the smart phone 1200. The speaker 1211 converts an audio signal output from the smart phone 1200 into sound.

[0182] The wireless communication interface 1212 supports any cellular communication scheme (such as LTE and LTE-Advanced), and performs wireless communication. The wireless communication interface 1212 may generally include, for example, a BB processor 1213 and an RF circuit 1214. The BB processor 1213 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and perform various types of signal processing for wireless communication. Meanwhile, the RF circuit 1214 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive wireless signals via an antenna 1216. The wireless communication interface 1212 may be a chip module on which the BB processor 1213 and the RF circuit 1214 are integrated. Fig.12 As shown, the wireless communication interface 1212 may include multiple BB processors 1213 and multiple RF circuits 1214. Fig.12 An example is shown in which the wireless communication interface 1212 includes a plurality of BB processors 1213 and a plurality of RF circuits 1214 , but the wireless communication interface 1212 may also include a single BB processor 1213 or a single RF circuit 1214 .

[0183] In addition, in addition to the cellular communication scheme, the wireless communication interface 1212 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 1212 can include a BB processor 1213 and an RF circuit 1214 for each wireless communication scheme.

[0184] Each of the antenna switches 1215 switches a connection destination of the antenna 1216 between a plurality of circuits (eg, circuits for different wireless communication schemes) included in the wireless communication interface 1212 .

[0185] Each of the antennas 1216 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for the wireless communication interface 1212 to transmit and receive wireless signals. Fig.12 As shown, the smartphone 1200 may include multiple antennas 1216. Fig.12 An example is shown in which the smart phone 1200 includes a plurality of antennas 1216 , but the smart phone 1200 may also include a single antenna 1216 .

[0186] In addition, the smartphone 1200 may include an antenna 1216 for each wireless communication scheme. In this case, the antenna switch 1215 may be omitted from the configuration of the smartphone 1200.

[0187] The bus 1217 connects the processor 1201, the memory 1202, the storage device 1203, the external connection interface 1204, the camera 1206, the sensor 1207, the microphone 1208, the input device 1209, the display device 1210, the speaker 1211, the wireless communication interface 1212, and the auxiliary controller 1219 to each other. Fig.12 The various blocks of the smartphone 1200 shown are supplied with power, the feed lines being partially shown as dashed lines in the figure. The auxiliary controller 1219 operates the minimum necessary functions of the smartphone 1200, for example in a sleep mode.

[0188] exist Fig.12 In the illustrated smart phone 1200, by using Figure 8 The processing circuit 810 and the energy detection unit 811 therein can be implemented by the processor 1201 or the auxiliary controller 1219, and by using Figure 8 The communication unit 820 described may be implemented by the wireless communication interface 1212. At least part of the functions may also be implemented by the processor 1201 or the auxiliary controller 1219. For example, the processor 1201 or the auxiliary controller 1219 may perform a positioning measurement assistance data determination function, a positioning measurement function, and a positioning information generation function by executing instructions stored in the memory 1202 or the storage device 1203.

[0189] Fig.1313 is a block diagram showing an example of a schematic configuration of a car navigation device 1320 to which the technology of the present disclosure can be applied. The car navigation device 1320 includes a processor 1321, a memory 1322, a global positioning system (GPS) module 1324, a sensor 1325, a data interface 1326, a content player 1327, a storage medium interface 1328, an input device 1329, a display device 1330, a speaker 1331, a wireless communication interface 1333, one or more antenna switches 1336, one or more antennas 1337, and a battery 1338.

[0190] The processor 1321 may be, for example, a CPU or a SoC, and controls a navigation function and other functions of the car navigation device 1320. The memory 1322 includes a RAM and a ROM, and stores data and a program executed by the processor 1321.

[0191] The GPS module 1324 measures the position (such as latitude, longitude and altitude) of the car navigation device 1320 using GPS signals received from GPS satellites. The sensor 1325 may include a group of sensors such as a gyro sensor, a geomagnetic sensor and an air pressure sensor. The data interface 1326 is connected to, for example, the vehicle network 1341 via a terminal not shown, and acquires data (such as vehicle speed data) generated by the vehicle.

[0192] The content player 1327 reproduces content stored in a storage medium such as a CD and a DVD, which is inserted into the storage medium interface 1328. The input device 1329 includes, for example, a touch sensor, a button, or a switch configured to detect a touch on the screen of the display device 1330, and receives an operation or information input from a user. The display device 1330 includes a screen such as an LCD or an OLED display, and displays an image of a navigation function or reproduced content. The speaker 1331 outputs a sound of a navigation function or reproduced content.

[0193] The wireless communication interface 1333 supports any cellular communication scheme (such as LTE and LTE-Advanced) and performs wireless communication. The wireless communication interface 1333 may generally include, for example, a BB processor 1334 and an RF circuit 1335. The BB processor 1334 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and perform various types of signal processing for wireless communication. Meanwhile, the RF circuit 1335 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive wireless signals via an antenna 1337. The wireless communication interface 1333 may also be a chip module on which the BB processor 1334 and the RF circuit 1335 are integrated. Fig.13 As shown, the wireless communication interface 1333 may include multiple BB processors 1334 and multiple RF circuits 1335. Fig.13 An example is shown in which the wireless communication interface 1333 includes a plurality of BB processors 1334 and a plurality of RF circuits 1335 , but the wireless communication interface 1333 may also include a single BB processor 1334 or a single RF circuit 1335 .

[0194] In addition, in addition to the cellular communication scheme, the wireless communication interface 1333 can support other types of wireless communication schemes, such as short-range wireless communication schemes, near field communication schemes, and wireless LAN schemes. In this case, for each wireless communication scheme, the wireless communication interface 1333 can include a BB processor 1334 and an RF circuit 1335.

[0195] Each of the antenna switches 1336 switches a connection destination of the antenna 1337 between a plurality of circuits (such as circuits for different wireless communication schemes) included in the wireless communication interface 1333 .

[0196] Each of the antennas 1337 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for the wireless communication interface 1333 to transmit and receive wireless signals. Fig.13 As shown, the car navigation device 1320 may include multiple antennas 1337. Fig.13 An example is shown in which the car navigation device 1320 includes a plurality of antennas 1337 , but the car navigation device 1320 may also include a single antenna 1337 .

[0197] In addition, the car navigation device 1320 may include an antenna 1337 for each wireless communication scheme. In this case, the antenna switch 1336 may be omitted from the configuration of the car navigation device 1320.

[0198] Battery 1338 is fed via a feeder Fig.13 The respective blocks of the illustrated car navigation device 1320 are supplied with electric power, and feed lines are partially illustrated as dotted lines in the figure. The battery 1338 accumulates electric power supplied from the vehicle.

[0199] exist Fig.13 In the illustrated car navigation device 1320, by using Figure 8 The processing circuit 810 and the energy detection unit 811 therein can be implemented by the processor 1321 and by using Figure 8 The communication unit 820 described may be implemented by the wireless communication interface 1333. At least part of the functions may also be implemented by the processor 1321. For example, the processor 1321 may perform the positioning measurement assistance data determination function, the positioning measurement function, and the positioning information generation function by executing instructions stored in the memory 1322.

[0200] The technology of the present disclosure may also be implemented as an in-vehicle system (or vehicle) 1340 including one or more blocks of a car navigation device 1320, an in-vehicle network 1341, and a vehicle module 1342. The vehicle module 1342 generates vehicle data (such as vehicle speed, engine speed, and fault information), and outputs the generated data to the in-vehicle network 1341.

[0201] In the system and method of the present disclosure, it is obvious that each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present disclosure. In addition, the steps of performing the above series of processes can naturally be performed in chronological order according to the order of description, but do not necessarily need to be performed in chronological order. Some steps can be performed in parallel or independently of each other.

[0202] Although the embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings, it should be understood that the embodiments described above are only used to illustrate the present disclosure and do not constitute a limitation of the present disclosure. For those skilled in the art, various modifications and changes can be made to the above embodiments without departing from the essence and scope of the present disclosure. Therefore, the scope of the present disclosure is limited only by the attached claims and their equivalent meanings.

Claims

1. An electronic device in a wireless communication system, wherein: The wireless communication system includes at least one first cell and one or more second cells, at least one of the one or more second cells operates in an unlicensed frequency band, wherein the electronic device includes: One or more processing circuits configured to: configuring at least one second cell operating in an unlicensed frequency band for the user equipment to perform carrier aggregation communication; and For each second cell operating in the unlicensed frequency band, dynamically or semi-statically generate energy detection threshold information, so that the user equipment performs energy detection on the unlicensed frequency band based on the energy detection threshold information, The processing circuit reuses the downlink control information DCI format 1C to include the energy detection threshold information in the DCI format 1C to notify the user equipment.

2. The electronic device according to claim 1, wherein: The processing circuit reuses the bit used to indicate the uplink and downlink configuration of the second cell in the DCI format 1C as an indication of an energy detection threshold when the second cell operating in the unlicensed frequency band performs energy detection.

3. The electronic device according to claim 1, wherein: The processing circuit includes the energy detection threshold information in a medium access control MAC signaling to notify the user equipment.

4. The electronic device according to claim 1, wherein: The processing circuit includes the energy detection threshold information in radio resource control RRC signaling to notify the user equipment.

5. The electronic device according to claim 4, wherein: The energy detection threshold information includes an indication of an energy detection threshold for a second cell operating in an unlicensed frequency band, and the processing circuit is further configured to perform the following operations before generating the energy detection threshold information: The values ​​of the multiple candidate energy detection thresholds are included in radio resource control RRC signaling to notify the user equipment.

6. The electronic device according to claim 1, wherein: The processing circuit generates the energy detection threshold information based on the service load and / or the channel idle probability of the unlicensed frequency band.

7. The electronic device according to claim 1, wherein: The processing circuit generates the energy detection threshold information based on energy detection threshold indication information received from other electronic devices.

8. The electronic device according to claim 1, wherein: In response to the energy detection report from the user equipment, the processing circuit determines whether to use the second cell operating in the unlicensed frequency band for downlink transmission.

9. The electronic device according to any one of claims 1 to 4 and 6 to 8, wherein: The electronic device is a base station and further includes a transceiver configured to transmit the energy detection threshold information via an air interface.

10. The electronic device according to claim 9, wherein: The first cell operates in a licensed frequency band, and the transceiver is configured to transmit the energy detection threshold information through the first cell.

11. A user equipment in a wireless communication system, wherein: The wireless communication system includes at least one first cell and one or more second cells, at least one of the one or more second cells operates in an unlicensed frequency band, wherein the user equipment includes: A transceiver, the transceiver being configured to receive configuration information of at least one second cell operating in an unlicensed frequency band for carrier aggregation, and to receive energy detection threshold information for each second cell operating in the unlicensed frequency band; and one or more processing circuits, wherein the processing circuits are configured to perform energy detection on the unlicensed frequency band based on the energy detection threshold information, The processing circuit decodes the downlink control information DCI format 1C received by the transceiver to extract the energy detection threshold information.

12. The user equipment according to claim 11, wherein: The processing circuit decodes the medium access control MAC signaling received by the transceiver to extract the energy detection threshold information.

13. The user equipment according to claim 11, wherein: The processing circuit decodes the radio resource control RRC signaling received by the transceiver to extract the energy detection threshold information.

14. The user equipment according to claim 13, further comprising a memory, wherein: The energy detection threshold information includes an indication of an energy detection threshold for a second cell operating in an unlicensed frequency band, and the processing circuit decodes the radio resource control RRC signaling previously received by the transceiver to extract multiple candidate energy detection threshold values, and stores the multiple candidate energy detection threshold values ​​in the memory.

15. The user equipment according to claim 11, wherein: The transceiver is further configured to receive uplink transmission authorization information on a second cell operating in an unlicensed frequency band, and perform uplink transmission when an energy detection result of the second cell operating in the unlicensed frequency band indicates that the unlicensed frequency band is idle.

16. The user equipment according to claim 11, wherein: The transceiver sends the result of the energy detection by the processing circuit to a base station in the wireless communication system that provides services for the user equipment.

17. A method for wireless communication in a wireless communication system, wherein: The wireless communication system includes at least one first cell and one or more second cells, at least one of the one or more second cells operates in an unlicensed frequency band, and the method includes: configuring at least one second cell operating in an unlicensed frequency band for the user equipment to perform carrier aggregation communication; and For each second cell operating in the unlicensed frequency band, dynamically or semi-statically generate energy detection threshold information, so that the user equipment performs energy detection on the unlicensed frequency band based on the energy detection threshold information, The method further includes: reusing downlink control information DCI format 1C to include the energy detection threshold information in the DCI format 1C to notify the user equipment.

18. A method for wireless communication in a wireless communication system, wherein: The wireless communication system includes at least one first cell and one or more second cells, at least one of the one or more second cells operates in an unlicensed frequency band, and the method includes: receiving configuration information of at least one second cell operating in an unlicensed frequency band for carrier aggregation; receiving energy detection threshold information for each second cell operating in the unlicensed frequency band; and Performing energy detection on the unlicensed frequency band based on the energy detection threshold information, The method further includes: decoding the received downlink control information DCI format 1C to extract the energy detection threshold information.

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