TWI595799B - Communication system, base station, user equipment, and discovery method for device-to-device communication - Google Patents
Communication system, base station, user equipment, and discovery method for device-to-device communication Download PDFInfo
- Publication number
- TWI595799B TWI595799B TW104140919A TW104140919A TWI595799B TW I595799 B TWI595799 B TW I595799B TW 104140919 A TW104140919 A TW 104140919A TW 104140919 A TW104140919 A TW 104140919A TW I595799 B TWI595799 B TW I595799B
- Authority
- TW
- Taiwan
- Prior art keywords
- information
- discovery
- user devices
- user device
- base station
- Prior art date
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Description
本發明是有關於一種裝置對裝置(Device-to-Device；D2D)通訊技術，且特別是有關於一種通訊系統、基地台、使用者裝置與裝置對裝置通訊的發現方法。 The present invention relates to a device-to-device (D2D) communication technology, and more particularly to a communication system, a base station, a user device, and a device-to-device communication method.
現有技術的無線通訊技術通常需透過核心網路來進行傳遞，將可能造成核心網路壅塞的問題，因此利用毋須透過基地台的直接通訊(Direct Communication)技術便逐漸受到重視。裝置對裝置(Device-to-Device；D2D)(或稱為裝置間)通訊是一種允許使用者裝置(user equipment；UE)彼此間直接通訊的技術，且其不需要基地台(如，eNodeB或增強型NodeB)在其間轉發資料。D2D通訊的應用可被分類為近端服務(proximity-based service；PBS；ProSe)(或稱為鄰近服務)，這是因為僅有在彼此附近的使 用者裝置才可應用此服務。D2D通訊主要可區分為三個主要程序：裝置發現(Device Discovery)、裝置之間的相互配對(Peering)以及通訊(Communication)。 The prior art wireless communication technology usually needs to be transmitted through the core network, which may cause congestion of the core network, and thus the use of Direct Communication technology that does not need to pass through the base station has gradually received attention. Device-to-Device (D2D) (or inter-device) communication is a technology that allows user equipment (UE) to communicate directly with each other, and it does not require a base station (eg, eNodeB or Enhanced NodeB) forwards data between them. The application of D2D communication can be classified as proximity-based service (PBS; ProSe) (or proximity service) because only in the vicinity of each other This service is only available to the user device. D2D communication can be mainly divided into three main programs: Device Discovery, Peering between devices, and Communication.
另一方面，每個行動通訊營運商皆會建置公眾行動電話網路(Public land mobile network；PLMN)，以向用戶提供通訊服務。每個行動通訊營運商所採用的通訊介面及頻段皆不相同，藉此以避免相互干擾等問題。圖1是一種通訊系統100的示意圖。基地台110與基地台120分別屬於不同行動通訊營運商的公眾行動電話網路。基地台110的通訊範圍R1與基地台120的通訊範圍R2內具有許多使用者裝置11~13、21~23以及31~33。然而，由於每個使用者裝置可能使用不同行動通訊營運商的服務，且每個行動通訊營運商所屬的PLMN具備不同的通訊界面及載波頻段皆有所不同。例如，使用者裝置11與12可能透過載波頻段為1800MHz來使用基地台110所提供的行動網路服務，使用者裝置13則透過載波頻段為700MHz來使用基地台120所提供的行動網路服務，則使用者裝置11無法跨頻段地得知使用者裝置13的相關信息。因此目前僅能使隸屬於相同行動通訊營運商的使用者裝置進行D2D通訊，而無法讓使用者裝置可以跨越行動通訊營運商以及載波頻段的限制來進行D2D通訊。 On the other hand, each mobile communication operator will establish a Public Land Mobile Network (PLMN) to provide communication services to users. The communication interface and frequency band used by each mobile communication operator are different to avoid mutual interference. FIG. 1 is a schematic diagram of a communication system 100. The base station 110 and the base station 120 belong to a public mobile telephone network of different mobile communication operators, respectively. The communication range R1 of the base station 110 and the communication range R2 of the base station 120 have a plurality of user devices 11 to 13, 21 to 23, and 31 to 33. However, since each user device may use the services of different mobile communication operators, and the PLMN to which each mobile communication operator belongs has different communication interfaces and carrier frequency bands. For example, the user devices 11 and 12 may use the mobile network service provided by the base station 110 through the carrier frequency band of 1800 MHz, and the user device 13 uses the mobile network service provided by the base station 120 through the carrier frequency band of 700 MHz. The user device 11 cannot know the information about the user device 13 across the frequency band. Therefore, at present, only user devices belonging to the same mobile communication carrier can perform D2D communication, and the user device cannot perform D2D communication across the mobile communication operator and the carrier frequency band limitation.
本發明實施例揭露一種通訊系統、基地台、使用者裝置 與裝置對裝置通訊的發現方法。 Embodiments of the present invention disclose a communication system, a base station, and a user device. A method of discovering communication with a device.
本發明揭露的通訊系統一實施例包括一基地台。此基地台服務位於此基地台的傳輸範圍內的多個使用者裝置。每個使用者裝置使用多個載波頻段的其中之一進行通訊。所述基地台透過這些載波頻段以獲得這些使用者裝置的裝置對裝置通訊請求，依據這些使用者裝置的位置而區分這些使用者裝置為多個群組。所述基地台配置位於預定載波頻段的發現資源池給同一群組中的這些使用者裝置，使每個使用者裝置在此發現資源池中傳輸對應自身的發現信息。 An embodiment of the communication system disclosed by the present invention includes a base station. The base station service is located in a plurality of user devices within the transmission range of the base station. Each user device communicates using one of a plurality of carrier frequency bands. The base station transmits the device-to-device communication requests of the user devices through the carrier frequency bands, and the user devices are divided into a plurality of groups according to the locations of the user devices. The base station configures the discovery resource pools in the predetermined carrier frequency band to the user devices in the same group, so that each user device transmits the discovery information corresponding to itself in the discovery resource pool.
本發明揭露的使用者裝置一實施例包括收發器以及處理器。所述收發器用以透過多個載波頻段的其中之一來收發無線資料以進行通訊。所述處理器操作性地耦接收發器。所述處理器透過所述收發器以傳送所述使用者裝置的裝置對裝置通訊請求至基地台，透過所述收發器以從所述基地台獲得資訊池信息。所述資訊池信息用以指示預定載波頻段的發現資源池配置給位於群組中的使用者裝置。每一群組中的使用者裝置在地域上相互鄰近。所述處理器透過收發器以在所述發現資源池中傳輸所述使用者裝置的發現信息。 An embodiment of the user device disclosed by the present invention includes a transceiver and a processor. The transceiver is configured to transmit and receive wireless data through one of a plurality of carrier frequency bands for communication. The processor is operatively coupled to a receiver. The processor transmits a device communication request to the base station through the transceiver to transmit the device of the user device, and the information is obtained from the base station through the transceiver. The information pool information is used to indicate that the discovery resource pool of the predetermined carrier frequency band is configured to the user equipment located in the group. The user devices in each group are geographically adjacent to each other. The processor transmits the discovery information of the user device in the discovery resource pool through a transceiver.
本發明揭露的另一個使用者裝置實施例包括收發器以及處理器。所述收發器用以透過多個載波頻段的其中之一來收發無線資料以進行通訊。所述處理器操作性地耦接收發器。所述處理器透過所述收發器以傳送所述使用者裝置的裝置對裝置通訊請求 至一基地台，透過所述收發器以從所述基地台獲得資訊池信息。所述資訊池信息用以指示預定載波頻段的發現資源池配置給位於一群組中的使用者裝置。每一群組中的使用者裝置在地域上相互鄰近，並且所述使用者裝置具備對應此發現資源池的優先權信息。所述處理器透過收發器來監控所述預定載波頻段，並依據此優先權信息來選擇性地接收其他使用者裝置的發現信息。 Another embodiment of the user device disclosed by the present invention includes a transceiver and a processor. The transceiver is configured to transmit and receive wireless data through one of a plurality of carrier frequency bands for communication. The processor is operatively coupled to a receiver. The processor transmits, by the transceiver, a device-to-device communication request for transmitting the user device To a base station, the transceiver is used to obtain information pool information from the base station. The information pool information is used to indicate that the discovery resource pool of the predetermined carrier frequency band is configured to the user equipment located in a group. The user devices in each group are geographically adjacent to each other, and the user device has priority information corresponding to the discovery resource pool. The processor monitors the predetermined carrier frequency band through a transceiver, and selectively receives discovery information of other user devices according to the priority information.
本發明揭露的基地台一實施例包括發射器、接收器以及處理電路。所述發射器及所述接收器分別用以透過多個載波頻段的其中之一來收發無線資料以進行通訊。處理電路操作性地耦接發射器及接收器。處理電路藉由所述接收器以透過這些載波頻段以獲得多個使用者裝置的裝置對裝置通訊請求，依據這些使用者裝置的位置而區分這些使用者裝置為多個群組，藉由所述發射器以配置位於預定載波頻段的發現資源池給同一群組中的使用者裝置。 An embodiment of the base station disclosed by the present invention includes a transmitter, a receiver, and a processing circuit. The transmitter and the receiver are respectively configured to transmit and receive wireless data through one of a plurality of carrier frequency bands for communication. The processing circuit is operatively coupled to the transmitter and the receiver. Processing, by the receiver, by transmitting the carrier frequency bands to obtain device-to-device communication requests of the plurality of user devices, and distinguishing the user devices into a plurality of groups according to the locations of the user devices, The transmitter configures the discovery resource pool located in the predetermined carrier frequency band to the user devices in the same group.
本發明揭露的裝置對裝置通訊的發現方法適用於基地台。所述發現方法一實施例包括下列步驟。透過多個載波頻段以獲得多個使用者裝置的裝置對裝置通訊請求，其中此基地台使用所述載波頻段的其中之一與這些使用者裝置進行通訊。依據這些使用者裝置的位置而區分這些使用者裝置為多個群組。以及，配置位於預定載波頻段的發現資源池給同一群組中的這些使用者裝置。 The device-discovery method for device communication disclosed by the present invention is applicable to a base station. An embodiment of the discovery method includes the following steps. A device-to-device communication request for a plurality of user devices is obtained through a plurality of carrier frequency bands, wherein the base station communicates with the user devices using one of the carrier frequency bands. These user devices are distinguished into a plurality of groups depending on the location of these user devices. And configuring the discovery resource pools located in the predetermined carrier frequency band to the user devices in the same group.
本發明揭露的裝置對裝置通訊的發現方法適用於使用者 裝置。所述發現方法一實施例包括下列步驟。傳送使用者裝置的裝置對裝置通訊請求至基地台。從基地台獲得資訊池信息，其中此資訊池信息用以指示預定載波頻段的發現資源池配置給位於同一群組中的使用者裝置，每一群組中的使用者裝置在地域上相互鄰近。在此發現資源池中傳輸此使用者裝置的此發現信息。 The device for discovering device communication disclosed by the present invention is applicable to a user Device. An embodiment of the discovery method includes the following steps. The device transmitting the user device communicates the device communication request to the base station. The information pool information is obtained from the base station, wherein the information pool information is used to indicate that the discovery resource pool of the predetermined carrier frequency band is configured to the user devices located in the same group, and the user devices in each group are geographically adjacent to each other. It is found here that this discovery information of this user device is transmitted in the resource pool.
基於上述，本發明實施例所揭露的通訊系統及其發現方法，可藉由地域性來將這些使用者裝置區分為不同群組，使隸屬於不同行動通訊供應商的使用者裝置能夠跨越不同的載波頻段以及公眾行動電話網路(PLMN)設備進行近端服務裝置對裝置通訊的裝置發現。 Based on the above, the communication system and the method for discovering the same disclosed in the embodiments of the present invention can distinguish the user devices into different groups by geographically, so that the user devices belonging to different mobile communication providers can span different The carrier frequency band and the public mobile telephone network (PLMN) device perform device discovery of device communication to the near-end service device.
為讓本發明的上述特徵和優點能更明顯易懂，下文特舉實施例，並配合所附圖式作詳細說明如下。 The above described features and advantages of the invention will be apparent from the following description.
11~13、121~23、31~33、UE、UE1~UE2‧‧‧使用者裝置 11~13, 121~23, 31~33, UE, UE1~UE2‧‧‧ user device
100‧‧‧通訊系統 100‧‧‧Communication system
110、120、210‧‧‧基地台 110, 120, 210‧‧‧ base station
320‧‧‧表示資源分配信息的表格 320‧‧‧Forms indicating resource allocation information
330‧‧‧表示優先權信息的表格 330‧‧‧Forms indicating priority information
410‧‧‧發射器 410‧‧‧transmitter
420‧‧‧接收器 420‧‧‧ Receiver
430‧‧‧處理電路 430‧‧‧Processing circuit
510‧‧‧收發器 510‧‧‧ transceiver
520‧‧‧處理器 520‧‧‧ processor
S610~S670、S810~S830、S910~S930‧‧‧步驟 S610~S670, S810~S830, S910~S930‧‧‧ steps
圖1是一種通訊系統的示意圖。 Figure 1 is a schematic diagram of a communication system.
圖2是依照本發明一實施例的一種通訊系統的示意圖。 2 is a schematic diagram of a communication system in accordance with an embodiment of the present invention.
圖3繪示預定載波頻段、資源分配信息以及優先權信息的一實施例示意圖。 FIG. 3 is a schematic diagram showing an embodiment of a predetermined carrier frequency band, resource allocation information, and priority information.
圖4是依照本發明一實施例的一種基地台的功能方塊圖。 4 is a functional block diagram of a base station in accordance with an embodiment of the present invention.
圖5是依照本發明一實施例的使用者裝置的功能方塊圖。 FIG. 5 is a functional block diagram of a user device according to an embodiment of the invention.
圖6是依照本發明一實施例的一種裝置對裝置通訊的發現方 法的流程示意圖。 FIG. 6 is a diagram of a device-to-device communication discovery method according to an embodiment of the invention. Schematic diagram of the process.
圖7是圖6中基地台對於裝置對裝置通訊的發現方法一實施例的步驟流程圖。 7 is a flow chart showing the steps of an embodiment of the method for discovering device-to-device communication in the base station of FIG.
圖8是圖6中使用者裝置UE1對於裝置對裝置通訊的發現方法一實施例的步驟流程圖。 FIG. 8 is a flow chart showing the steps of an embodiment of the method for discovering device-to-device communication by the user device UE1 of FIG.
圖9是圖6中使用者裝置UE2對於裝置對裝置通訊的發現方法一實施例的步驟流程圖。 FIG. 9 is a flow chart showing the steps of an embodiment of the method for discovering device-to-device communication by the user device UE2 of FIG.
圖2是依照本發明一實施例的一種通訊系統200的示意圖。如圖2所示，通訊系統200包括基地台210以及多個使用者裝置11~13、21~23及31~33，這些使用者裝置中的部分使用者裝置隸屬於不同行動通訊供應商。使用者裝置11~13、21~23及31~33位於基地台210的傳輸範圍內。為清楚描述本發明實施例，使用者裝置11~13的位置地理上相互鄰近，使用者裝置21~23的位置地理上相互鄰近，且使用者裝置31~33的位置地理上相互鄰近。 2 is a schematic diagram of a communication system 200 in accordance with an embodiment of the present invention. As shown in FIG. 2, the communication system 200 includes a base station 210 and a plurality of user devices 11-13, 21-23, and 31-33. Some of the user devices belong to different mobile communication providers. The user devices 11 to 13, 21 to 23, and 31 to 33 are located within the transmission range of the base station 210. In order to clearly describe the embodiments of the present invention, the positions of the user devices 11-13 are geographically adjacent to each other, the positions of the user devices 21-23 are geographically adjacent to each other, and the positions of the user devices 31-33 are geographically adjacent to each other.
依照本發明的基地台210可以是演進節點B(Evolved Node B：eNB或eNodeB)，其通訊範圍為R1。於其他實施例中，基地台210也可選用其他類型的技術或硬體來實現，例如，其他類型的基地台210可為高級基站(advanced base station；ABS)、基站收發系統(base transceiver system；BTS)、接入點、歸屬基站、中繼器、中間節點、中間設備、基於衛星的通訊基站、移動 性管理實體(Mobility Management Entity；MME)、服務閘道(Serving Gateway；S-GW)、分組資料閘道(Packet Data Network Gateway；PDN-GW)、服務GPRS支援節點(Serving GPRS Support Node；SGSN)、閘道GPRS支持節點(Gateway GPRS Support Node；GGSN)、移動交換中心(Mobile Switching Center；MSC)以及歸屬使用者伺服器(Home Subscriber Server；HSS)或對有關使用者資訊的資料庫進行維護的節點等等。基地台210所使用的行動網路技術可以是長期演進技術(Long Term Evolution；LTE)。而依照本發明實施例的使用者裝置11~13、21~23及31~33則可以同時採用LTE以及D2D直連通訊技術。 The base station 210 according to the present invention may be an evolved Node B (Evolved Node B: eNB or eNodeB) with a communication range of R1. In other embodiments, the base station 210 can also be implemented by other types of technologies or hardware. For example, other types of base stations 210 can be advanced base stations (ABSs), base transceiver systems (base transceiver systems; BTS), access point, home base station, repeater, intermediate node, intermediate equipment, satellite-based communication base station, mobile Mobility Management Entity (MME), Serving Gateway (S-GW), Packet Data Network Gateway (PDN-GW), Serving GPRS Support Node (SGSN) Gateway GPRS Support Node (GGSN), Mobile Switching Center (MSC), and Home Subscriber Server (HSS) or maintain a database of user information. Nodes and so on. The mobile network technology used by the base station 210 may be Long Term Evolution (LTE). The user devices 11~13, 21~23, and 31~33 according to the embodiments of the present invention can simultaneously adopt LTE and D2D direct communication technologies.
使用者裝置11~13、21~23及31~33可以代表多種電子設備，這些實施例(例如)可以包含(但不限於)行動台、高級行動台(advanced mobile station，AMS)、伺服器、使用者端、臺式電腦、膝上型電腦、網路電腦、工作站、個人數位助理(personal digital assistant，PDA)、平板電腦(tablet PC)、掃描器、電話裝置、呼叫器、照相機、電視、掌上型視頻遊戲裝置、音樂裝置、無線感測器等。 User devices 11~13, 21~23, and 31~33 may represent a variety of electronic devices, and these embodiments may include, for example, but not limited to, a mobile station, an advanced mobile station (AMS), a server, User side, desktop computer, laptop computer, network computer, workstation, personal digital assistant (PDA), tablet PC, scanner, telephone device, pager, camera, television, Palm-type video game devices, music devices, wireless sensors, and the like.
本發明實施例的通訊系統200可統合隸屬於不同行動通訊供應商的使用者裝置11~13、21~23及31~33，使這些使用者裝置11~13、21~23及31~33能夠跨越不同的載波頻段以及公眾行動電話網路設備，進行近端服務裝置對裝置通訊的裝置發現。依照本發明一實施例，基地台210會透過這些行動通訊供應商的多個 載波頻段來獲得這些使用者裝置11~13、21~23及31~33的D2D通訊請求。不同的載波頻段及傳輸參數可隸屬於不同的行動通訊供應商，且每個使用者裝置11~13、21~23及31~33可使用這些行動通訊供應商其中之一的行動通訊服務。因此，為了能夠跨越載波頻段及公眾行動電話網路的區別，基地台210透過全部已知的載波頻段來接收使用者裝置11~13、21~23及31~33的D2D通訊請求。於部分實施例中，基地台210也可由不同公眾行動電話網路(PLMN)中的多個控制節點所組成。這些控制節點會將其所屬之PLMN中的使用者裝置所發出的D2D通訊請求透過核心網路或是網際網路傳送至特定基地台210中。 The communication system 200 of the embodiment of the present invention can integrate the user devices 11~13, 21~23 and 31~33 belonging to different mobile communication providers, so that the user devices 11~13, 21~23 and 31~33 can Device discovery of device communication to the near-end service device is carried out across different carrier frequency bands and public mobile telephone network devices. According to an embodiment of the invention, the base station 210 transmits multiple of these mobile communication providers. The carrier frequency band is used to obtain D2D communication requests of these user devices 11~13, 21~23 and 31~33. Different carrier frequency bands and transmission parameters can belong to different mobile communication providers, and each user device 11~13, 21~23 and 31~33 can use the mobile communication service of one of these mobile communication providers. Therefore, in order to be able to cross the difference between the carrier frequency band and the public mobile telephone network, the base station 210 receives the D2D communication requests of the user devices 11~13, 21~23 and 31~33 through all known carrier frequency bands. In some embodiments, base station 210 may also be comprised of multiple control nodes in different public mobile telephone networks (PLMNs). These control nodes transmit D2D communication requests from user devices in the PLMN to which they belong to the specific base station 210 via the core network or the Internet.
基地台210在收到這些使用者裝置11~13、21~23及31~33的D2D通訊請求之後，便會依據這些使用者裝置11~13、21~23及31~33的地理位置而將這些使用者裝置11~13、21~23及31~33區分為多個群組。本實施例中是以三個群組G1~G3作為舉例。由於D2D通訊屬於近端服務，需要兩使用者裝置相互鄰近，因此基地台210將相互鄰近的使用者裝置區分為相同群組。例如，基地台210將使用者裝置11~13分為群組G1、將使用者裝置21~23分為群組G2，以及將使用者裝置31~33分為群組G3。換句話說，每個群組G1~G3中的使用者裝置在地域上相互鄰近。 After receiving the D2D communication request of the user devices 11~13, 21~23 and 31~33, the base station 210 will according to the geographical locations of the user devices 11~13, 21~23 and 31~33. These user devices 11 to 13, 21 to 23, and 31 to 33 are divided into a plurality of groups. In this embodiment, three groups G1 to G3 are taken as an example. Since the D2D communication belongs to the near-end service, the two user devices are required to be adjacent to each other, so the base station 210 divides the user devices adjacent to each other into the same group. For example, the base station 210 divides the user devices 11 to 13 into groups G1, divides the user devices 21 to 23 into groups G2, and divides the user devices 31 to 33 into groups G3. In other words, the user devices in each of the groups G1 to G3 are geographically adjacent to each other.
將這些使用者裝置依據地域性進行分組之後，基地台210配置位於預定(predefined)載波頻段CF的發現資源池(discovery resource pool)給同一群組中的使用者裝置。圖3繪示預定載波頻 段CF、資源分配信息以及優先權信息一實施例的示意圖。請同時參照圖2及圖3，基地台210可以從上述多個PLMN對應的載波頻段中選擇其中一個來做為預定載波頻段CF，也可以透過公用的載波頻段來作為預定載波頻段CF。於部分實施例中，基地台210也可以利用系統信息區塊(System information block；SIB)、無線資源控制(RRC)協定或是實體下行共享通道(Physical Downlink Shared Channel；PDSCH)來通知各個使用者裝置11~13、21~23及31~33有關於預定載波頻段CF以及相對應之發現資源池的信息。此發現資源池的信息可稱為是資訊池信息。基地台210可在此預定載波頻段CF中選擇其中一個區塊作為資源池RP1並分配給群組G1中的使用者裝置11~13；將資源池RP2分配給群組G2中的使用者裝置21~23；將資源池RP3分配給群組G3中的使用者裝置31~33。由於這些資源池RP1、RP2及RP3是提供給使用者裝置11~13、21~23、31~33傳輸D2D通訊中的發現信息之用，因此這些資源池也可稱為是發現資源池RP1、RP2及RP3。 After grouping these user devices according to regionality, the base station 210 configures a discovery resource pool located in a predetermined carrier frequency band CF to the user devices in the same group. Figure 3 shows the predetermined carrier frequency Schematic diagram of an embodiment of segment CF, resource allocation information, and priority information. Referring to FIG. 2 and FIG. 3 simultaneously, the base station 210 may select one of the carrier frequency bands corresponding to the plurality of PLMNs as the predetermined carrier frequency band CF, or may use the common carrier frequency band as the predetermined carrier frequency band CF. In some embodiments, the base station 210 may also notify each user by using a system information block (SIB), a radio resource control (RRC) protocol, or a physical downlink shared channel (PDSCH). The devices 11~13, 21~23 and 31~33 have information about the predetermined carrier frequency band CF and the corresponding discovery resource pool. The information of this discovery resource pool can be referred to as information pool information. The base station 210 may select one of the predetermined carrier frequency bands CF as the resource pool RP1 and assign it to the user devices 11 to 13 in the group G1; and allocate the resource pool RP2 to the user device 21 in the group G2. ~23; The resource pool RP3 is assigned to the user devices 31-33 in the group G3. Since these resource pools RP1, RP2, and RP3 are provided to the user devices 11~13, 21~23, and 31~33 for transmitting discovery information in the D2D communication, these resource pools may also be referred to as the discovery resource pool RP1. RP2 and RP3.
每個群組中的每個使用者裝置在得知其所屬的資源池之後，便會依據基地台210所提供的資源分配信息來傳遞其使用者裝置所對應的發現信息給其他使用者裝置。一實施例中的基地台210可利用系統信息區塊(SIB)、無線資源控制(RRC)協定或是實體下行共享通道(PDSCH)來將此資源分配信息通知對應的使用者裝置。在此以許組G3以及其中的使用者裝置31~33來做為舉例，圖2實施例中的基地台210將對應資源池RP3的資源分配信 息(如圖3中所繪示的表格320)傳遞給群組G3中的使用者裝置31~33。 Each user device in each group, after knowing the resource pool to which it belongs, transmits the discovery information corresponding to the user device to other user devices according to the resource allocation information provided by the base station 210. The base station 210 in an embodiment may notify the corresponding user equipment of the resource allocation information by using a System Information Block (SIB), a Radio Resource Control (RRC) protocol, or a Physical Downlink Shared Channel (PDSCH). Here, taking the group G3 and the user devices 31-33 therein as an example, the base station 210 in the embodiment of FIG. 2 will allocate resources to the resource pool RP3. The information (such as the table 320 as shown in FIG. 3) is passed to the user devices 31-33 in the group G3.
在此詳細說明資源分配信息(表格320)，基地台210所使用的通訊技術可將每個發現資源池區分為多個資源塊，每個資源塊可分配給不同的使用者裝置來傳遞與其對應的發現信息。例如，對應資源池RP3的表格320中依序會讓使用者裝置11、12以及13分別傳遞與其對應的發現信息DM11、DM12以及DM13。藉此，作為傳遞發現信息的使用者裝置便可得知該在何者資源塊上傳播D2D通訊的發現信息，而不致干擾到其他使用者裝置。 The resource allocation information (table 320) is described in detail herein. The communication technology used by the base station 210 can divide each discovery resource pool into multiple resource blocks, and each resource block can be assigned to a different user device to transmit the corresponding information. Discovery information. For example, the table 320 corresponding to the resource pool RP3 sequentially causes the user devices 11, 12, and 13 to respectively transmit the discovery information DM11, DM12, and DM13 corresponding thereto. Thereby, the user device transmitting the discovery information can know the discovery information of the D2D communication on the resource block, without disturbing other user devices.
為了讓使用者裝置可以選擇性地接收及解碼所需的發現訊息且忽略無關的發現信息，本發明一實施例還可針對每個使用者裝置提供對應不同資源池的優先權信息，使用者裝置可依據這些優先權數值來判斷是否接收並解析位於表格320中的各種資源塊的發現信息。優先權信息可如圖3實施例中的表格330所示。優先權信息(表格330)可包括分別針對表格320中各個資源塊所具備的多個優先權數值(例如，表格330中的數值”1”、”2”、”3”、”n”，其中n為正整數)。由於此表格330對應資源池RP3的表格320，因此此優先權信息應提供給使用者裝置31~33其中之一(在此假設提供給使用者裝置31)。在此舉例，當優先權數值越低，則使用者裝置31便會優先地接收及解析此優先權數值所對應資源池RP3的資源塊當中的發現信息。例如，使用者裝置31在參考優先權信息(表格330)之後，便會優先地接收 及解析發現信息DM32，之後第二優先順位才是發現信息DM33。如此一來，使用者裝置31便不需要將資源池RP3中所有資源塊當中的發現信息皆逐一接收及解析，而可選擇性地忽略或延後接收並未具有優先權的發現信息，藉以提升使用者裝置在進行近端服務D2D通訊的使用效能。 In order to enable the user device to selectively receive and decode the required discovery message and ignore the irrelevant discovery information, an embodiment of the present invention may further provide priority information corresponding to different resource pools for each user device, the user device. Whether or not to receive and parse the discovery information of the various resource blocks located in the table 320 can be determined based on these priority values. The priority information can be as shown in table 330 in the embodiment of FIG. The priority information (table 330) may include a plurality of priority values (e.g., values in the table 330) 1", "2", "3", "n", respectively, for each resource block in the table 320, wherein n is a positive integer). Since this table 330 corresponds to the table 320 of the resource pool RP3, this priority information should be provided to one of the user devices 31-33 (provided here to the user device 31). For example, when the priority value is lower, the user device 31 preferentially receives and parses the discovery information among the resource blocks of the resource pool RP3 corresponding to the priority value. For example, the user device 31 will receive the priority information after referring to the priority information (table 330). And the discovery information DM32 is analyzed, and then the second priority is the discovery information DM33. In this way, the user device 31 does not need to receive and parse the discovery information among all the resource blocks in the resource pool RP3 one by one, and can selectively ignore or delay receiving the discovery information that does not have priority, thereby improving The user device is performing the performance of the near-end service D2D communication.
於本發明中，優先權信息可以已經預先設定在使用者裝置當中。舉例來說，使用者裝置31~33可預先設定資源池RP3中前五個資源塊為優先權數值最高者，務必要首先接收並解析。另一方面，本發明的優先權信息也可以依照D2D通訊的現實情況來動態地被調整後由基地台210傳送給不同的使用者裝置。舉例來說，基地台210可查看這些使用者裝置的D2D通訊請求的類型。若為特殊的急難救助類型，基地台210則將此D2D通訊請求所對應的資源塊的優先權數值設定為最高(例如為數值”1”)，並透過同步傳輸協定(如系統信息區塊(SIB)、無線資源控制(RRC)協定或是實體下行共享通道(PDSCH))將已修改後的優先權信息提供至各個使用者裝置。本發明的優先權信息可以藉由表格330來呈現，基地台210也可以僅傳輸一個或數個優先權數值(例如，僅傳輸優先權數值”1”、”2”、”n”及其對應的表格欄位)至對應的使用者裝置來更新表格330。換句話說，本發明實施例並未限制優先權信息的呈現方式以及傳輸方法，應用本實施例者可以依其設定來進行資訊傳遞及信息更新。 In the present invention, the priority information may have been previously set in the user device. For example, the user devices 31-33 may preset that the first five resource blocks in the resource pool RP3 have the highest priority value, and must first receive and parse. On the other hand, the priority information of the present invention can also be dynamically adjusted in accordance with the reality of the D2D communication and transmitted by the base station 210 to different user devices. For example, base station 210 can view the type of D2D communication request for these user devices. If it is a special type of emergency rescue, the base station 210 sets the priority value of the resource block corresponding to the D2D communication request to the highest (for example, the value "1"), and transmits the synchronous transmission protocol (such as the system information block ( The SIB), the Radio Resource Control (RRC) protocol, or the Physical Downlink Shared Channel (PDSCH)) provides the modified priority information to each user device. The priority information of the present invention can be presented by table 330. Base station 210 can also transmit only one or several priority values (e.g., only transmit priority values 1", "2", "n" and their corresponding The table field is updated to the corresponding user device to update the table 330. In other words, the embodiment of the present invention does not limit the presentation manner and the transmission method of the priority information. The application of the embodiment can perform information transmission and information update according to the setting.
在本發明中，優先權信息中的優先權數值可透過發出發 現信息的使用者裝置的通訊用途類型、公眾行動電話網路的類型或是發現信息的信息強度來決定。使用者裝置的通訊用途類型主要可分為急難救助(Public safety)以及非急難救助兩種類型。當使用者裝置的通訊用途類型為急難救助的話，表示該使用者裝置的用戶有緊急事故發生及需他人協助，因此才會使用D2D通訊來搜尋與發現附近的人員協助。因此，透過通訊用途類型為急難救助來提出D2D通訊的發現信息應為最高優先權數值。公眾行動電話網路的類型則與使用者裝置本身所在的公眾行動電話網路有關。例如，當使用者裝置31位於PLMN1中，且使用者裝置31想要與同屬於PLMN1的使用者裝置(如，使用者裝置32)相互通訊時，則在產生或更新優先權信息時，應可提高與使用者裝置31具備相同PLMM類型的其他使用者裝置的優先權數值，藉以能夠讓相同PLMM類型的多個使用者裝置進行D2D通訊。有關於PLMN的相關信息，基地台210可透過SIB19來傳輸給各個使用者裝置。 In the present invention, the priority value in the priority information can be sent out The type of communication use of the user device of the current information, the type of public mobile telephone network, or the information strength of the discovered information is determined. The types of communication uses of user devices can be mainly divided into two types: public safety and non-emergency assistance. When the communication type of the user device is urgently rescued, it means that the user of the user device has an emergency and needs assistance from others, so the D2D communication is used to search and discover the assistance of nearby people. Therefore, the discovery information for D2D communication through the type of communication use for emergency assistance should be the highest priority value. The type of public mobile telephone network is related to the public mobile telephone network in which the user device itself is located. For example, when the user device 31 is located in the PLMN1 and the user device 31 wants to communicate with the user device (e.g., the user device 32) that belongs to the PLMN1, then the priority information should be generated or updated. It is possible to increase the priority value of the other user devices of the same PLMM type as the user device 31, so that a plurality of user devices of the same PLMM type can perform D2D communication. Regarding the related information of the PLMN, the base station 210 can transmit to each user device through the SIB 19.
優先權信息中的優先權數值還可透過發現信息的信息強度來決定。雖然基地台210已經依照地理上相互鄰近的使用者裝置進行區分，但在同一群組中的各個使用者裝置仍然具備不同的距離。因此，可透過參考信號接收功率(Reference Signal Receiving Power；RSRP)技術或是參考信號接收品質(Reference Signal Receiving Quality；RSRQ)技術來量測發現資源池中各個資源塊的信號強度，進而動態調整優先權信息中的各個優先權數值。使 用者裝置可透過信號強度量測來得知該些發現信息的信息強度。另一方面，由於使用者裝置在接收與離其最近的使用者裝置的發現信息時應可獲得最強的信號強度，因此可讓鄰近的使用者裝置能夠盡速發現到對方，並進而較快地進行D2D通訊。 The priority value in the priority information can also be determined by the information strength of the discovery information. Although the base station 210 has been distinguished according to geographically adjacent user devices, each user device in the same group still has a different distance. Therefore, the reference signal receiving power (RSRP) technology or the reference signal receiving quality (RSRQ) technology can be used to measure the signal strength of each resource block in the resource pool, and then dynamically adjust the priority. Each priority value in the weight information. Make The user device can know the information strength of the discovery information through the signal strength measurement. On the other hand, since the user device should obtain the strongest signal strength when receiving the discovery information of the user device closest to it, the neighboring user device can find the other party as soon as possible, and then quickly Perform D2D communication.
圖4是依照本發明一實施例的一種基地台210的功能方塊圖。基地台210主要包括發射器410、接收器420以及處理電路430。發射器410及接收器420分別用以透過多個載波頻段的其中之一來收發無線資料以進行通訊。發射器410及接收器420中可包含相應載波頻段的天線及控制晶片。處理電路430操作性地耦接發射器410及接收器420，藉以執行本發明實施例關於基地台210的相應動作流程。圖5是依照本發明一實施例的使用者裝置UE的功能方塊圖。此處的使用者裝置UE為圖2中使用者裝置11~13、21~23、31~33的舉例。使用者裝置包括收發器510以及處理器520。收發器510可包含相應載波頻段的天線及控制晶片。收發器510透過多個載波頻段的其中之一來收發無線資料以進行通訊。處理器520則操作性地耦接收發器510，藉以執行本發明實施例中關於使用者裝置UE的相應動作流程。 4 is a functional block diagram of a base station 210 in accordance with an embodiment of the present invention. The base station 210 mainly includes a transmitter 410, a receiver 420, and a processing circuit 430. The transmitter 410 and the receiver 420 are respectively configured to transmit and receive wireless data through one of a plurality of carrier frequency bands for communication. The antenna 410 and the control 420 may be included in the transmitter 410 and the receiver 420. The processing circuit 430 is operatively coupled to the transmitter 410 and the receiver 420 to perform a corresponding operational flow of the base station 210 in accordance with an embodiment of the present invention. FIG. 5 is a functional block diagram of a user equipment UE according to an embodiment of the invention. The user device UE here is an example of the user devices 11 to 13, 21 to 23, and 31 to 33 in FIG. 2 . The user device includes a transceiver 510 and a processor 520. Transceiver 510 can include antennas and control chips for respective carrier frequency bands. The transceiver 510 transmits and receives wireless data through one of a plurality of carrier frequency bands for communication. The processor 520 is operatively coupled to the receiver 510 to perform a corresponding action flow for the user device UE in the embodiment of the present invention.
圖6是依照本發明一實施例的一種裝置對裝置通訊的發現方法的流程示意圖，其適用於圖2的通訊系統200。請參照圖6，圖6中主要繪示基地台210、用於傳送發現信息的使用者裝置UE1以及用於接收發現信息的使用者裝置UE2。於步驟S610中，基地台210的處理電路藉由接收器以透過多個載波頻段以獲得多個使 用者裝置(例如，使用者裝置UE1)的裝置對裝置通訊請求。換句話說，使用者裝置UE1的處理器透過其收發器以傳送使用者裝置UE1的裝置對裝置通訊請求至基地台210。 FIG. 6 is a schematic flow chart of a method for discovering device-to-device communication according to an embodiment of the present invention, which is applicable to the communication system 200 of FIG. Please refer to FIG. 6. FIG. 6 mainly shows a base station 210, a user equipment UE1 for transmitting discovery information, and a user equipment UE2 for receiving discovery information. In step S610, the processing circuit of the base station 210 transmits a plurality of carrier frequency bands by the receiver to obtain a plurality of The device of the user device (eg, user device UE1) requests a device communication. In other words, the processor of the user device UE1 transmits a device-to-device communication request to the base station 210 through its transceiver to transmit the user device UE1.
步驟S620中，基地台210的處理電路依據其傳輸範圍內之使用者裝置的位置而區分這些使用者裝置為多個群組。於步驟S630中，基地台210的處理電路藉由其發射器以配置位於預定載波頻段的發現資源池給同一群組中的使用者裝置UE1及UE2。在此假設使用者裝置相互鄰近且被分配到同一群組中。換句話說，使用者裝置UE1及UE2分別透過其自身的收發器以從基地台210獲得資訊池信息。此資訊池信息用以指示預定載波頻段的發現資源池給位於相同群組中的使用者裝置。藉此，步驟S610至S630即可實現本發明實施例中裝置對裝置通訊的發現方法。 In step S620, the processing circuit of the base station 210 distinguishes the user devices into a plurality of groups according to the location of the user device within the transmission range. In step S630, the processing circuit of the base station 210 uses its transmitter to configure the discovery resource pool located in the predetermined carrier frequency band to the user devices UE1 and UE2 in the same group. It is assumed here that the user devices are adjacent to each other and are assigned to the same group. In other words, the user devices UE1 and UE2 respectively obtain information pool information from the base station 210 through their own transceivers. The information pool information is used to indicate a discovery resource pool of a predetermined carrier frequency band to user devices located in the same group. Thereby, steps S610 to S630 can implement the device-to-device communication discovery method in the embodiment of the present invention.
圖6中的步驟S640至步驟S670則是更為詳細說明本發明實施例中裝置對裝置通訊的發現方法額外的功能，例如是，使用者裝置UE1、UE2可透過發現資源池的優先權信息來選擇性地接收發現信息。於步驟S640中，基地台210還可以利用系統信息區塊(SIB)、無線資源控制(RRC)協定或是實體下行共享通道(PDSCH)將優先權信息提供至各個使用者裝置UE1及UE2。於部分實施例中，步驟S640也可以不用進行，因為優先權信息可能已預先設定在各個使用者裝置UE1及UE2中。 Steps S640 to S670 in FIG. 6 are additional functions for more specifically describing the device-to-device communication discovery method in the embodiment of the present invention. For example, the user devices UE1 and UE2 can access the priority information of the resource pool. Selectively receive discovery information. In step S640, the base station 210 may further provide priority information to each user equipment UE1 and UE2 by using a System Information Block (SIB), a Radio Resource Control (RRC) protocol, or a Physical Downlink Shared Channel (PDSCH). In some embodiments, step S640 may not be performed because the priority information may have been preset in each user device UE1 and UE2.
於步驟S650中，使用者裝置UE1的處理器透過其收發器以在被分配的發現資源池中傳輸使用者裝置UE1的發現信息。於 步驟S660中，使用者裝置UE2的處理器透過其自身的收發器來監控所述預定載波頻段，並依據優先權信息來選擇性地接收其他使用者裝置的發現信息。於步驟S670中，使用者裝置UE2便可依據所接收的發現信息來發現可進行近端服務裝置對裝置通訊的其他使用者裝置(如，使用者裝置UE1)，從而使使用者裝置UE1及UE2相互進行D2D通訊而不需要基地台210的中介。本發明實施例中各步驟的詳細操作方式已揭露於上述實施例中。 In step S650, the processor of the user equipment UE1 transmits the discovery information of the user equipment UE1 in the allocated discovery resource pool through its transceiver. to In step S660, the processor of the user equipment UE2 monitors the predetermined carrier frequency band through its own transceiver, and selectively receives the discovery information of other user devices according to the priority information. In step S670, the user equipment UE2 can discover other user devices (eg, user device UE1) that can perform communication between the near-end service device and the device according to the received discovery information, so that the user devices UE1 and UE2 D2D communication is performed with each other without the intermediary of the base station 210. Detailed operation modes of the steps in the embodiments of the present invention have been disclosed in the above embodiments.
圖7是圖6中基地台210對於裝置對裝置通訊的發現方法一實施例的步驟流程圖。於步驟S710中，處理電路430藉由接收器420以透過多個載波頻段以獲得多個使用者裝置的裝置對裝置通訊請求。於步驟S720中，處理電路430依據這些使用者裝置的位置而區分這些使用者裝置為多個群組。於步驟S730中，處理電路430藉由發射器410以配置位於預定載波頻段的發現資源池給同一群組中的使用者裝置。於一實施例中，處理電路430可藉由發射器410將優先權信息提供至各個使用者裝置。本發明實施例中各步驟的詳細操作方式已揭露於上述實施例中。 FIG. 7 is a flow chart showing the steps of an embodiment of the method for discovering device-to-device communication by the base station 210 of FIG. In step S710, the processing circuit 430 passes the plurality of carrier frequency bands by the receiver 420 to obtain device-to-device communication requests of the plurality of user devices. In step S720, the processing circuit 430 distinguishes the user devices into a plurality of groups according to the positions of the user devices. In step S730, the processing circuit 430, by the transmitter 410, configures a discovery resource pool located in a predetermined carrier frequency band to the user equipment in the same group. In an embodiment, the processing circuit 430 can provide priority information to each user device by the transmitter 410. Detailed operation modes of the steps in the embodiments of the present invention have been disclosed in the above embodiments.
圖8是圖6中使用者裝置UE1對於裝置對裝置通訊的發現方法一實施例的步驟流程圖。於步驟S810中，使用者裝置UE1的處理器傳送使用者裝置UE1的裝置對裝置通訊請求至基地台210。於步驟S820中，使用者裝置UE1從基地台210獲得資訊池信息，此資訊池信息用以指示預定載波頻段的發現資源池給位於相同群組中的使用者裝置。於步驟S830中，使用者裝置UE1的處 理器在所述發現資源池中傳輸使用者裝置UE1的發現信息。本發明實施例中各步驟的詳細操作方式已揭露於上述實施例中。 FIG. 8 is a flow chart showing the steps of an embodiment of the method for discovering device-to-device communication by the user device UE1 of FIG. In step S810, the processor of the user equipment UE1 transmits the device-to-device communication request of the user equipment UE1 to the base station 210. In step S820, the user equipment UE1 obtains the information pool information from the base station 210, and the information pool information is used to indicate the discovery resource pool of the predetermined carrier frequency band to the user equipments located in the same group. In step S830, where the user device UE1 is located The processor transmits the discovery information of the user equipment UE1 in the discovery resource pool. Detailed operation modes of the steps in the embodiments of the present invention have been disclosed in the above embodiments.
圖9是圖6中使用者裝置UE2對於裝置對裝置通訊的發現方法一實施例的步驟流程圖。於步驟S910中，使用者裝置UE2從基地台210獲得優先權信息。於步驟S920中，使用者裝置UE2依據此優先權信息來設定所要接收的發現信息。於步驟S930中，使用者裝置UE2監控此預定載波頻段，並依據此優先權信息來選擇性地接收其他使用者裝置的發現信息。本發明實施例中各步驟的詳細操作方式已揭露於上述實施例中。 FIG. 9 is a flow chart showing the steps of an embodiment of the method for discovering device-to-device communication by the user device UE2 of FIG. In step S910, the user equipment UE2 obtains priority information from the base station 210. In step S920, the user equipment UE2 sets the discovery information to be received according to the priority information. In step S930, the user equipment UE2 monitors the predetermined carrier frequency band, and selectively receives the discovery information of other user devices according to the priority information. Detailed operation modes of the steps in the embodiments of the present invention have been disclosed in the above embodiments.
綜上所述，本發明實施例所述的通訊系統及其發現方法可藉由地域性來將這些使用者裝置區分為不同群組，使隸屬於不同行動通訊供應商的使用者裝置能夠跨越不同的載波頻段以及公眾行動電話網路(PLMN)設備進行近端服務裝置對裝置通訊的裝置發現。使用者裝置還可透過屬於發現資源池的優先權信息來選擇性地接收及解碼所需之發現信息，且忽略無關的發現信息，藉以提升使用者裝置在進行近端服務的使用效能。 In summary, the communication system and the method for discovering the same according to the embodiments of the present invention can distinguish the user devices into different groups by geographically, so that the user devices belonging to different mobile communication providers can span differently. The carrier frequency band and the device discovery of the public mobile telephone network (PLMN) device for the near-end service device to device communication. The user device can also selectively receive and decode the required discovery information through the priority information belonging to the discovery resource pool, and ignore the irrelevant discovery information, thereby improving the performance of the user device in performing the near-end service.
雖然本發明已以實施例揭露如上，然其並非用以限定本發明，任何所屬技術領域中具有通常知識者，在不脫離本發明的精神和範圍內，當可作些許的更動與潤飾，故本發明的保護範圍當視後附的申請專利範圍所界定者為準。 Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.
S610~S670‧‧‧步驟 S610~S670‧‧‧Steps
Claims (35)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/981,949 US9894698B2 (en) | 2015-05-13 | 2015-12-29 | Communication system, base station, user equipment, and discovery method for device-to-device communication |
| CN201610139884.8A CN106162572B (en) | 2015-05-13 | 2016-03-11 | Communication system, base station, user device, and method for discovering device-to-device communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201562160621P | 2015-05-13 | 2015-05-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW201640945A TW201640945A (en) | 2016-11-16 |
| TWI595799B true TWI595799B (en) | 2017-08-11 |
Family
ID=57850784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW104140919A TWI595799B (en) | 2015-05-13 | 2015-12-07 | Communication system, base station, user equipment, and discovery method for device-to-device communication |
Country Status (1)
| Country | Link |
|---|---|
| TW (1) | TWI595799B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012159270A1 (en) * | 2011-05-25 | 2012-11-29 | Renesas Mobile Corporation | Resource allocation for d2d communication |
| WO2014169695A1 (en) * | 2013-04-16 | 2014-10-23 | 中兴通讯股份有限公司 | Device-to-device (d2d) discovery method, base station, and user equipment |
| WO2014179989A1 (en) * | 2013-05-10 | 2014-11-13 | 上海贝尔股份有限公司 | Method and device for supporting device-to-device (d2d) communication in wireless communications system |
-
2015
- 2015-12-07 TW TW104140919A patent/TWI595799B/en active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012159270A1 (en) * | 2011-05-25 | 2012-11-29 | Renesas Mobile Corporation | Resource allocation for d2d communication |
| WO2014169695A1 (en) * | 2013-04-16 | 2014-10-23 | 中兴通讯股份有限公司 | Device-to-device (d2d) discovery method, base station, and user equipment |
| WO2014179989A1 (en) * | 2013-05-10 | 2014-11-13 | 上海贝尔股份有限公司 | Method and device for supporting device-to-device (d2d) communication in wireless communications system |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201640945A (en) | 2016-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9894698B2 (en) | Communication system, base station, user equipment, and discovery method for device-to-device communication | |
| JP6450488B2 (en) | Management of communication resources between devices | |
| US9468032B2 (en) | Inter-device session connectivity enhancement | |
| WO2019091228A1 (en) | Communication method and network device | |
| KR101791284B1 (en) | Method and apparatus to enable ad hoc networks | |
| US12015926B2 (en) | Control apparatus and method for wireless communication system supporting cognitive radio | |
| JP6575850B2 (en) | Wireless communication terminal and base station allocation method | |
| WO2016145735A1 (en) | D2d-based data sharing method, apparatus, and device | |
| JP6377773B2 (en) | Selection between cellular communication link and inter-device (D2D) communication link for communication between user equipment (UE) devices | |
| TW201714419A (en) | Channel availability coordination for WI-FI and unlicensed bands using radio access network | |
| KR20150010434A (en) | A mobility support for D2D enabled UE in a wireless system | |
| WO2016155113A1 (en) | Group communication method, user equipment, base station device and system | |
| US9544782B2 (en) | Systems, apparatus, and methods for range extension of wireless communication | |
| KR20200080307A (en) | Nodes and method for determining target PLMN ID and target cell ID | |
| WO2016170719A1 (en) | Radio communication terminal and frequency assignment method | |
| US10004029B2 (en) | Mobile station, base station, restriction control method, and broadcast information transmission method | |
| JP6435399B2 (en) | Selection between cellular and link-to-device (D2D) communication links using reference signals | |
| JP2023515782A (en) | Dynamic spectrum sharing in wireless communication systems | |
| CN114731720A (en) | 5G double-connection mechanism supporting multiple operators with different service flows simultaneously | |
| US20240205814A1 (en) | Network discovery and selection of accessing localized services | |
| KR20120022022A (en) | Method and apparatus for setting control information of user equipment in wireless communication system | |
| CN116508392A (en) | Access mode selection method, terminal equipment and network equipment | |
| TWI595799B (en) | Communication system, base station, user equipment, and discovery method for device-to-device communication | |
| WO2019111317A1 (en) | Base station device, radio communication system, and terminal device | |
| KR20140042752A (en) | Method of device to device discovery and apparatus thereof |