WO2011088886A1 - Appareil et procédé - Google Patents

Appareil et procédé Download PDF

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Publication number
WO2011088886A1
WO2011088886A1 PCT/EP2010/050564 EP2010050564W WO2011088886A1 WO 2011088886 A1 WO2011088886 A1 WO 2011088886A1 EP 2010050564 W EP2010050564 W EP 2010050564W WO 2011088886 A1 WO2011088886 A1 WO 2011088886A1
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WO
WIPO (PCT)
Prior art keywords
resources
communication
user equipment
controller
device communication
Prior art date
Application number
PCT/EP2010/050564
Other languages
English (en)
Inventor
Martti Jaakko Rytivaara
Original Assignee
Nokia Siemens Networks Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Siemens Networks Oy filed Critical Nokia Siemens Networks Oy
Priority to EP10701653A priority Critical patent/EP2526709A1/fr
Priority to PCT/EP2010/050564 priority patent/WO2011088886A1/fr
Publication of WO2011088886A1 publication Critical patent/WO2011088886A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/345—Interference values
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup

Definitions

  • the embodiments of the invention relate generally to com ⁇ munication networks and, more particularly, to an appara ⁇ tus and a method in communication networks utilizing de- vice to device communication.
  • communication between user equipment is generally realized using base stations. How ⁇ ever, some systems support also direct device to device communication between user equipment.
  • the device to device communication may be realized without base station or net- work infrastructure support.
  • Device to device communication may be used to implement many kinds of services which do not require transmitting large amounts of information. Such services may relate to authentication and payments, for example. Brief description
  • an apparatus comprising: a controller configured to control the apparatus to have a capability of communi ⁇ cating with a communication network infrastructure using given physical radio uplink and downlink resources, and to utilize a predetermined subset of physical radio uplink resources for device to device communication in Time Divi ⁇ sion Duplex mode without network infrastructure involve ⁇ ment .
  • the apparatus may be configured to search for the prede ⁇ termined resources when a need for device to device commu ⁇ nication arises.
  • an apparatus comprising: a controller configured to control the apparatus to have a capability of communi ⁇ cating with user equipment using given physical radio up ⁇ link and downlink resources, to denote a predetermined subset of physical radio uplink resources as device to de ⁇ vice communication resources in Time Division Duplex mode, and to limit the use of said denoted resources when commu ⁇ nicating with user equipment.
  • the apparatus may be configured to use said denoted re ⁇ sources when communicating with user equipment only when other resources are not available.
  • the apparatus may be configured to control the transmis ⁇ sion power used on said denoted resources when communicat ⁇ ing with user equipment to be below a predetermined level.
  • a method comprising: utilizing for de- vice to device communication in Time Division Duplex mode without network infrastructure involvement a predetermined subset of physical radio uplink resources otherwise used in communication with a communication network infrastructure .
  • a method comprising: controlling an ap ⁇ paratus to have the capability of communicating with user equipment using given physical radio uplink and downlink resources, denoting a predetermined subset of physical ra ⁇ dio uplink resources as device to device communication re- sources in Time Division Duplex mode, and limiting the use of said denoted resources when communicating with user equipment
  • a chipset may comprise the apparatus discussed above.
  • a computer program comprising program code means adapted to perform the methods discussed above.
  • an article of manufacture comprising a computer readable medium and embodying program instruc- tions thereon executable by a computer operably coupled to a memory which, when executed by the computer, perform methods discussed above.
  • an apparatus comprising means for con- trolling the apparatus to have a capability of communicat ⁇ ing with a communication network infrastructure using given physical radio uplink and downlink resources, and means for utilizing a predetermined subset of physical ra ⁇ dio uplink resources for device to device communication in Time Division Duplex mode without network infrastructure involvement .
  • an apparatus comprising means for con ⁇ trolling the apparatus to have a capability of communicat- ing with user equipment using given physical radio uplink and downlink resources, means for denoting a predetermined subset of physical radio uplink resources as device to de ⁇ vice communication resources in Time Division Duplex mode, and means for to limiting the use of said denoted re ⁇ sources when communicating with user equipment.
  • Figure 1A illustrates an example of Time Division Duplex
  • Figure IB illustrates an example of Frequency Division Du ⁇ plex
  • Figure 1C illustrates an example of an embodiment
  • FIG. 2 illustrates simplified examples of apparatuses
  • Figures 3A, 3B, 3C and 3D are flowcharts illustrating some embodiments of the invention.
  • Embodiments are applicable to any user equipment, base station, server, corresponding component, and/or to any communication system or any combination of different communication systems that support required functionality.
  • Embodiments of the invention may be realized in communica ⁇ tion systems based on long term evolution (LTE) or long term evolution advanced (LTE-A) .
  • LTE-A supports both Frequency Division Duplex (FDD) and Time Division Duplex (TDD) mode of communication.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • both uplink (user equipment to base station) and downlink (base station to user equipment) transmission directions are transmitted on the same frequency band, separated in time domain.
  • Figure 1A illustrates an example of TDD mode. A frequency band having a bandwidth between 1.4 to 20 MHz is utilised. Both downlink and uplink transmissions utilize the whole bandwidth but at different time instants. A guard period is needed between the transmission directions as switching between transmission directions has a small hardware related delay in user equipment and base sta- tions.
  • Figure IB illustrates an example of FDD mode.
  • Frequency Division Duplex uplink and downlink transmis- sion directions are transmitted on different frequency bands, with a given du
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • PRB Physical Resource Blocks
  • Physical Resource Block comprises 12 subcarriers each hav ⁇ ing the width of 15 KHz, making the width of a PRB 180 kHz.
  • Figure 1C illustrates an example of an embodiment of the invention.
  • Figure 1C is a simplified system architecture only showing some elements and functional entities, all being logical units whose implementation may differ from what is shown.
  • the connections shown in Figure IB are logical connections; the actual physical connections may be different. It is apparent to a person skilled in the art that the systems also comprise other functions and structures. It should be appreciated that the functions, structures, elements and the protocols used in or for group communication, are irrelevant to the actual inven ⁇ tion. Therefore, they need not to be discussed in more de ⁇ tail here.
  • Figure 1C shows base stations 100, 102 of a LTE communica- tion network.
  • the base stations 100, 102 may be called En ⁇ hanced Node Bs (eNodeB) .
  • the eNodeBs each serve a cell 100A, 102A.
  • Figure 1C shows user equipment 104, 106.
  • the user equipment are connected to the com ⁇ munication network via a connection 104A, 106A to eNodeB 100.
  • the connections 104A, 106A are real ⁇ ized using given physical radio uplink and downlink resources either in Time Division Duplex (TDD) or Frequency Division Duplex (FDD) mode.
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • the user equipment of Figure 1C are capable of a device to device connection 108 between each other.
  • the user equipment may be in device to device commu- nication 110 with a communication device 112 which is in a fixed location such as a road toll collecting site.
  • the communication device may have a capability of communicat ⁇ ing 114 with the communication network.
  • a proportion of physical layer uplink resources of a communication system may be prioritized but not reserved for device to device communication.
  • the com ⁇ munication between user equipment and eNodeB may utilize either FDD or TDD.
  • the proposed solution does not depend on the duplex mode in use.
  • the user equipment 104, 106 and communication device 112 may be configured to utilize a predetermined subset of physical radio uplink resources for device to device communication without net ⁇ work infrastructure involvement.
  • the device to device com- munication may utilize TDD mode when using the predetermined subset of physical radio uplink resources.
  • the pre ⁇ determined subset of physical radio uplink resources may comprise one or more physical resource blocks.
  • the predetermined subset of physical radio uplink re- sources may be used for device to device communication without any requests sent to an eNodeB of a communication network, as long as the associated transmit power is kept below a predetermined value.
  • Communication networks may support device to device commu- nication by configuring the eNodeB' s of the network to limit the utilisation of the predetermined subset of physical radio uplink resources for normal communication links between user equipment and eNodeB.
  • an eNodeB does not allocate the prede- termined subset of physical radio uplink resources at all, but leaves them for device to device communication users. This way these resources may be used within the associated cell for device to device communication and the devices are expected to employ a maximum transmit power below a predefined threshold value, -40 dBm for instance, as the two devices can be expected to be brought deliberately close together, at least for authentication and payment type of applications.
  • a predefined threshold value -40 dBm for instance
  • the predetermined resources are used for normal communication links if other resources are not available. In another embodiment, when the predetermined resources are used for normal communication links the transmission power on those links is limited below a given value.
  • an eNodeB allocates said predeter- mined subset of physical radio uplink resources only to user equipment that are close enough to the eNodeB so that proper throughput can be reached with transmission power no greater than a certain threshold value, -35dBm for instance.
  • an eNodeB is configured to moni- tor possible device to device communication on said re ⁇ sources, and determine the use of said resources for com ⁇ munication with user equipment on the basis of the monitoring .
  • each network may include more cells, more operators may exist in the geographical area, the networks of two or more operators may overlap, the sizes and form of the cells vary from that depicted in Figure 1C, etc.
  • Figure 2 shows user equipment 104 which comprises a controller 200 configured to control the operation of the device.
  • the user equipment further comprises a memory 202 operationally connected to the controller and configured to store data and software 204.
  • a transceiver 206 con ⁇ trolled by the controller 200 coupled to one or more an ⁇ tennas 208.
  • the user equipment 104 further comprises user interface 210.
  • the user interface may comprise a speaker, a keyboard, a display, a microphone and a camera, for ex ⁇ ample .
  • the transceiver 206 is configured to set up and maintain a wireless connection to the eNodeB 100.
  • the transceiver 206 is configured to set up and maintain a wireless device to device connection 108 to another device (not shown) .
  • the user equipment 104 of Figure 2 may as well illustrate the structure of a communication device 112.
  • the differ ⁇ ences between the devices are not relevant to the embodi ⁇ ments of the invention.
  • a communication de- vice does not necessarily comprise similar user interface as user equipment.
  • FIG. 2 shows an eNodeB 100 which comprises a controller 212 configured to control the operation of the device.
  • a memory 214 is operationally connected to the controller 212 and configured to store data and software 216.
  • a transceiver 218 controlled by the controller 212 is cou ⁇ pled to one or more antennas 220.
  • the transceiver 218 is configured to set up and maintain a wireless connection to user equipment in the area of the eNodeB 100.
  • the eNodeB 100 further comprises an interface 222 with which the eNodeB is connected to a communication network infrastructure (not shown) .
  • the controller 200 of the user equipment 104 is configured to control the transceiver 206 of the user equipment to have a capability of communicating with a eNodeB 100 of a communication network infrastructure using given physical radio uplink and downlink resources in Time Division Duplex mode.
  • the controller may be further configured to utilize a predetermined subset of physical radio uplink resources for device to device communication without network infrastructure involvement.
  • the memory 202 may comprise information on predetermined physical resource blocks which are priori ⁇ tized for device to device communication and which may be taken into such use without requesting permission from an eNodeB.
  • the user equipment may receive information on the predetermined physical resource blocks from the eNodeB which may be configured to broadcast such information.
  • the controller 200 of the user equipment 104 may be configured to search for the predetermined resources when a need for device to device communication arises. If several re ⁇ sources are available, the controller may be configured to measure interference level of the available resources and select for device to device communication the resource having the lowest interference level.
  • the choice of the resource may be based on some other criteria. For example, the Physical Resource Block or Blocks with the highest frequency and at lowest transmit power.
  • the user equipment participating in de ⁇ vice to device communication is further configured to con ⁇ trol the transmission power used in device to device com- munication to be below a given threshold level. This re ⁇ prises interference to possible device to base station transmissions occurring nearby and using same resources.
  • communication networks may support device to device communication.
  • the controller 212 of an eNodeB 100 may be configured to denote a predetermined subset of physical radio uplink resources as device to device commu ⁇ nication resources, and limit the utilisation of the pre ⁇ determined subset of physical radio uplink resources for normal communication links between user equipment and the eNodeB 100.
  • the controller 212 is configured to use the predetermined resources for normal com ⁇ munication links if other resources are not available. In another embodiment, when the controller 212 is configured to control the transmission power used on connections us- ing the predetermined resources to be below a given value.
  • the controller 212 of an eNodeB may be configured to moni- tor possible device to device communication on said de ⁇ noted resources, and determine the predetermined transmis ⁇ sion power level on the basis of the monitoring.
  • the controller 212 is configured to monitor possible device to device communication on said denoted resources, and determine the use of said resources for communication with user equipment on the basis of the monitoring .
  • the user equipment may nonetheless estab ⁇ lish such connections independently without network sup ⁇ port .
  • Figures 3A to 3D are flowcharts illustrating some embodi- ments of the invention.
  • the embodiment of Figure 3A starts at step 300.
  • the user of the user equipment wishes to make a payment using the user equipment and utilizing device to device communication.
  • step 302 user equipment begins searching for a device to device communication channel.
  • the party requiring pay ⁇ ment and supporting device to device communication may have installed a communication device configured to trans ⁇ mit a beacon signal on a predetermined physical resource block prioritized for device to device communication.
  • a road toll payment may be activated by entering a given area with a vehicle.
  • the system detects the vehi ⁇ cle and initiates the beacon transmission.
  • the user equipment scans the resources until a beacon is detected in step 304.
  • the user equipment is configured to au ⁇ thenticate itself with the other party in step 306.
  • the authentication may be performed using ways known in the art.
  • the user may have acquired a user key or a certificate from the system in advance.
  • the communication device transmits a public key to the user equipment.
  • the controller 200 of the user equipment performs a hash operation to the key using the certificate stored in the memory 202.
  • the result is transmitted back to the communication device which may authenticate the user equipment on the basis of the hash operation.
  • This kind of authentication does not need a connection to a communication network at the time of the authentication procedure.
  • step 309 After authentication, actual communication 308 may take place.
  • the communication may comprise billing transaction, for example.
  • the process ends in step 309.
  • the embodiment of Figure 3B starts likewise at step 300.
  • the user of the user equipment is the originator of the device to device communication proce ⁇ dure .
  • step 310 the controller 200 of the user equipment 104 receives via the user interface 210 of the user equipment a command to set up device to device communication with a given apparatus.
  • step 312 the searches for available resource from the predetermined physical resource blocks which are priori ⁇ tized for device to device communication. Once such a re ⁇ source is found, the user equipment starts to transmit a beacon on the resource.
  • step 314 the user equipment checks if a reply to the beacon from another device has been received.
  • the process may continue as described above includ ⁇ ing possible authentication procedure and actual communi- cation.
  • the embodiment of Figure 3C starts likewise at step 320.
  • the device to device communication is initiated in step 322 in the above described manner either according to Figure 3A or Figure 3B.
  • step 324 a failure in the device to device communication is detected and the continuation of the device to device communication is deemed to be un- successful. This may be due to high interference, for ex ⁇ ample .
  • step 326 device to base station to device communica ⁇ tion is requested from a communication network to replace the failed device to device communication. The rest of the communication is performed using this replacement communi ⁇ cation link.
  • the devices exchange iden ⁇ tification information with another using device to device communication prior the communication via the base sta- tion.
  • step 328 The process ends in step 328.
  • the embodiment of Figure 3D starts at step 330.
  • step 332 the controller 200 of the user equipment 104 receives via the user interface 210 of the user equipment a command to set up device to device communication with a given apparatus .
  • the controller of the user equipment is configured to check a predetermined criterion prior to estab ⁇ lishing a device to device connection with a nearby de- vice. If the criterion fulfils, a device to base station to device connection is established instead of device to device connection. In an embodiment, the criterion is dis ⁇ tance of the devices from the nearest base station. If the participants of device to device communication as situated near a base station or eNodeB, it may not be advantageous to allow device to device communication. If the distance is smaller than a predetermined distance or if path loss of a signal received from the nearly eNodeB is smaller than a predetermined level the device to device communica- tion may be replaced with a device to base station to de ⁇ vice connection.
  • a device to base sta ⁇ tion to device is established in step 336 instead of a de ⁇ vice to device connection.
  • a device to device is established in step 338.
  • the user equipment desiring for device to device communication are close to an eNodeB so that de ⁇ vice to device communication might interfere the regular uplink users.
  • path loss measurement to- wards the eNodeB may be used as a selection criterion be ⁇ fore sending a device to device handshake signal to an ⁇ other device.
  • the device could instead of a direct signalling towards the other device send a request to the eNodeB to establish a device to device connection.
  • such threshold power levels for normal uplink and device to device communication utilizing the same PRBs are selected (-35dBm and -40dBm respec ⁇ tively, for instance) , so that a device to device hand- shake could fail in some cases, but regular uplink users would rarely experience less than reasonable Signal-to- Noise ratio.
  • two devices could always try device to device handshake at low transmit power be ⁇ fore requesting assistance from eNodeB for setting up de- vice to device connection.
  • the initiator for device to device communicator is camped to a cell of a communication network to such level at least that the frequency synchronization for uplink is properly carried out. This prevents any signalling on wrong PRBs, such as a downlink time slot or non-allowed frequency .
  • the listener of a device to device communication procedure shall adapt to device to device initiator handshake signal (time slot and frequence) . In this way the two partici ⁇ pants do not need to belong to the network of a same op ⁇ erator. A listener may quickly browse through several op- erator band prioritized resources.
  • the first thing is to swap between the listener and the initiator. In an embodiment, this takes place manu ⁇ ally, as operator of the initial listener might be less occupied or provide better support for device to device connections. In case of properly implemented device to de ⁇ vice payment and authentication systems, the customer is always the listener, and operator will release the appro ⁇ priate resources at that location.
  • user equipment desiring for a device to device connection may in some cases request assistance from an eNodeB for setting up the connection. There are some exemplary cases where the request can be considered reasonable.
  • both devices may send a device to eNodeB to device communication request to the eNodeB.
  • the eNodeB can discover (based on the arrival times time of requests, for example) which user equipment might be pro- posed for the device to device connect. This should in ⁇ volve some simple pass code procedure to avoid man-in-the- middle type of attacks. This procedure may enable device to device connections also for devices not supporting di ⁇ rect connection set ups .
  • the listener device may send the phone number or TMSI of the device to the eNodeB as a part of a device to device con ⁇ nection failure procedure.
  • the initiator may ask or read the phone number of the listener and send it to eNodeB as part of the de ⁇ vice to device initiation fail procedure.
  • the apparatuses are depicted above as examples illustrating some embodiments. It is ap ⁇ parent to a person skilled in the art that the apparatuses may also comprise other functions and/or structures. Al- though the apparatuses have been depicted each as one en ⁇ tity, different modules and memory may be implemented in one or more physical or logical entities.
  • the apparatuses may also be implemented as an electronic digital computer, which may comprise a working memory (RAM) , a central processing unit (CPU) , and a system clock.
  • the CPU may comprise a set of registers, an arith ⁇ metic logic unit, and a control unit.
  • the control unit is controlled by a sequence of program instructions trans ⁇ ferred to the CPU from the RAM.
  • the control unit may con- tain a number of microinstructions for basic operations.
  • the electronic digital computer may also have an operating system, which may provide system services to a computer program written with the program instructions.
  • the controller of the apparatus may contain a number of microin- structions for basic operations. The implementation of microinstructions may vary, depending on the CPU design.
  • the program instructions may be coded by a programming language, which may be a high-level programming language, such as C, Java, etc., or a low-level programming lan- guage, such as a machine language, or an assembler.
  • the user equipment 104 of Figure 2 re ⁇ fers to a portable computing device.
  • Such computing de ⁇ vices include wireless mobile communication devices oper ⁇ ating with or without a subscriber identification module (SIM) , including, but not limited to, the following types of devices: mobile phone, smartphone, personal digital as ⁇ sistant (PDA), handset.
  • SIM subscriber identification module
  • the apparatuses of Figures 2 may be implemented using at least one chipset or integrated circuit such as ASICs (ap- plication-specific integrated circuit) .
  • Embodiments of the invention may be implemented as com ⁇ puter software executable by a processor, or as a combina ⁇ tion of software and hardware.
  • An embodiment provides a computer program embodied on a distribution medium, comprising program instructions which, when loaded into an electronic apparatus, perform the actions of the controller, transmitter, receiver and other units of the apparatuses described earlier.
  • the computer program may be in source code form, object code form, or in some intermediate form, and it may be stored in some sort of carrier, which may be any entity or device capable of carrying the program.
  • Some carriers in ⁇ clude a record medium, computer memory, read-only memory, and software distribution package, for example.
  • the computer program may be executed in a single electronic digital computer or it may be distributed amongst a number of computers.

Abstract

La présente invention se rapporte à un appareil et à un procédé. L'appareil selon la présente invention comprend : un contrôleur configuré pour contrôler l'appareil de telle sorte qu'il ait la possibilité de communiquer avec une infrastructure de réseau de communication en utilisant des ressources radio physiques données sur la liaison montante et sur la liaison descendante. Le contrôleur est configuré en outre pour utiliser un sous-ensemble prédéterminé de ressources radio physiques sur la liaison montante pour une communication de dispositif à dispositif dans un mode de duplexage par répartition dans le temps, sans implication de l'infrastructure du réseau.
PCT/EP2010/050564 2010-01-19 2010-01-19 Appareil et procédé WO2011088886A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP10701653A EP2526709A1 (fr) 2010-01-19 2010-01-19 Appareil et procédé
PCT/EP2010/050564 WO2011088886A1 (fr) 2010-01-19 2010-01-19 Appareil et procédé

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PCT/EP2010/050564 WO2011088886A1 (fr) 2010-01-19 2010-01-19 Appareil et procédé

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WO2011088886A1 true WO2011088886A1 (fr) 2011-07-28

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CN103581916A (zh) * 2012-07-19 2014-02-12 华为技术有限公司 小区间用户设备直接通信的方法、用户设备及通信系统
EP2941038A4 (fr) * 2012-12-30 2016-08-17 Lg Electronics Inc Appareil et procédé de réalisation d'une communication de dispositif à dispositif dans un système de communications sans fil
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US20090059841A1 (en) * 2006-01-11 2009-03-05 Rajiv Laroia Wireless communication methods and apparatus using beacon signals

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US20090059841A1 (en) * 2006-01-11 2009-03-05 Rajiv Laroia Wireless communication methods and apparatus using beacon signals
US20080069063A1 (en) * 2006-09-15 2008-03-20 Qualcomm Incorporated Methods and apparatus related to multi-mode wireless communications device supporting both wide area network signaling and peer to peer signaling

Cited By (9)

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Publication number Priority date Publication date Assignee Title
CN103139921A (zh) * 2011-11-24 2013-06-05 华为技术有限公司 终端直通的方法、终端直通终端和基站
EP2785130A1 (fr) * 2011-11-24 2014-10-01 Huawei Technologies Co., Ltd. Procédé de communication d2d, terminal de communication d2d et station de base
EP2785130A4 (fr) * 2011-11-24 2014-10-29 Huawei Tech Co Ltd Procédé de communication d2d, terminal de communication d2d et station de base
CN103139921B (zh) * 2011-11-24 2015-07-08 华为技术有限公司 终端直通的方法、终端直通终端和基站
US9750035B2 (en) 2012-05-15 2017-08-29 Telefonaktiebolaget Lm Ericsson (Publ) Scheduling apparatus and method thereof for setting up device-to-device communication
CN103581916A (zh) * 2012-07-19 2014-02-12 华为技术有限公司 小区间用户设备直接通信的方法、用户设备及通信系统
CN103581916B (zh) * 2012-07-19 2016-12-28 华为技术有限公司 小区间用户设备直接通信的方法、用户设备及通信系统
EP2941038A4 (fr) * 2012-12-30 2016-08-17 Lg Electronics Inc Appareil et procédé de réalisation d'une communication de dispositif à dispositif dans un système de communications sans fil
US9763278B2 (en) 2012-12-30 2017-09-12 Lg Electronics Inc. Apparatus and method for performing device-to-device communication in wireless communication system

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