US20160330760A1 - Channel Configuration in Device-to-Device Communications - Google Patents
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- US20160330760A1 US20160330760A1 US14/774,492 US201514774492A US2016330760A1 US 20160330760 A1 US20160330760 A1 US 20160330760A1 US 201514774492 A US201514774492 A US 201514774492A US 2016330760 A1 US2016330760 A1 US 2016330760A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
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- H—ELECTRICITY
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- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- H—ELECTRICITY
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- H04W72/20—Control channels or signalling for resource management
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- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Definitions
- the present invention relates to the allocation and configuration of Device-to-Device (D2D) channels for use by mobile radio communication devices such as User Equipments (UE) operating within a cellular communications network environment.
- D2D Device-to-Device
- UE User Equipments
- the invention relates to a method of configuring D2D channels within such an environment, a method of operating a UE to achieve such configuration, and related UE devices and computer programming products providing for such configuration.
- the concept of proximity based services (ProSe) within a cellular communications network environment has been identified as a mechanism for improving communication capacity and quality for service for UEs operating within such an environment while improving network capability by UEs off-loading.
- D2D communication is intended to allow for appropriate quality of service communication, between UEs operating within a cellular network environment and employing some network resources but not requiring communication through the network.
- D2D functionality includes in particular the support of unicast communications between UEs, for example UE pairs, in D2D communication or the support of broadcast or groupcast communications between UEs, for example from some UE towards other UEs.
- 3GPP 3 rd Generation Partnership Product
- P2CCH Physical Control Channel
- HARQ Hybrid Automatic Repeat Request
- CQI Channel Quality Indicator
- P2SCH Physical Shared Channel
- WO2012/159270 comprises a mechanism for allocating communication resources of a cellular communication network to D2D communication but which is disadvantageously limited and simply focuses on legacy radio resources, such as the frequency-band and resource-pool to be employed for D2D communication.
- the present invention seeks to provide for a method of configuring channel resources to convey control information for D2D communication within a cellular communications network environment, and to related mobile communication terminal devices and computer program products, having advantages over known such method related devices and computer programme products.
- a method of configuring a physical channel such as a physical control channel, for device-to-device communication between mobile terminal devices within a cellular communications network environment and comprising a step of locating a device-to-device control channel within a cellular uplink signalling spectrum, and applying a frequency offset parameter to determine separation of the device-to-device control channel from a cellular uplink control channel.
- the step of locating the device-to-device control channel can be determined within one of the said mobile terminal devices.
- a method of operating a mobile terminal device for device-to-device communication within a cellular network environment including, within the device, the step of locating a device-to device control channel within a cellular uplink signalling spectrum, and applying a frequency offset parameter to determine separation of the device-to-device control channel from a cellular uplink control channel.
- the present invention in all its various aspects, proves advantageous when considering possible impact on cellular connectivity within the network environment, and the legacy PUCCH in particular. It proves possible in particular to maintain downlink cellular capacity, and avoid radio interference between the legacy PUCCH and the configured P2CCH, through setting the said frequency offset to establish the appropriate distance/separation between the two control channels.
- the invention will exert only limited impact on an eNB scheduler through the effective separation of the D2D and cellular controls, i.e. through the provision of separate scheduling.
- the methods can also include the step of identifying the bandwidth of the device-to-device control channel.
- the methods include a step of determining the frequency offset by reference to cellular network uplink/downlink signalling.
- the step of determining the frequency offset parameter can include an adaption of an algorithm employed for determining physical uplink control channel characteristics within the cellular network environment.
- the terminal device can receive data identifying the location of the device-to-device control channel by way of Radio Resource Control SIB messaging.
- the methods can also include the step of identifying common configuration parameter values between terminal devices.
- the common configuration parameter values can be computed by means of a message exchange, such as a random channel access procedure between two mobile terminal devices.
- the common configuration parameter values can be determined on the basis of RRC SIB signalling in which neighbouring cell parameters are broadcast.
- the methods can thus be provided, for configuration of a mobile terminal device when served by a different cell of that of another mobile terminal device within a Radio Access Network.
- the methods can also be provided relation to a mobile terminal device outside RAN coverage of that of another mobile terminal device including the configuration of physical control channel for the device-to-device communication by way of a previously camped-on cell, or by way of a pre-set value in the USIM.
- the method can include the step of employing a discovery beacon for transport of device-to-device channel location parameters between the mobile terminals, and/or include the step of employing initial access signalling within a legacy random access procedure for the exchange of initial access messaging.
- the method can include the step of employing a X2 message/parameter for network-node to network-node communications for building neighbouring cell physical channel parameters.
- a cellular communications network mobile terminal device arranged for device-to-device communication with a further mobile terminal device and arranged for locating a device-to-device control channel within a cellular uplink signalling spectrum, and applying a frequency offset parameter to determine separation of the device-to-device control channel from a cellular uplink control channel.
- Such a device can be arranged to operate in accordance with any one or more of the method features noted above.
- a computer program product for a computer device comprising software code portions for performing the steps of any of the above method features when said product is run on the computer device.
- the computer program product can comprise a computer-readable medium on which said software code portions are stored.
- the computer program product of the invention can be directly loadable into the internal memory of the computer device and/or transmittable via a network by means of at least one of upload, download and push procedures.
- FIG. 1 is a schematic diagram illustrating D2D communication between peer UEs within a cellular network environment in which the invention can be adapted;
- FIG. 2 is a schematic representation of successive subframes illustrating configuration according to one aspect of the present invention
- FIG. 3 is a schematic representation of successive subframes illustrating configuration according to another aspect of the present invention.
- FIG. 4 is a schematic diagram of a subframe exhibiting configuration according to the embodiment of FIG. 3 ;
- FIG. 5 is a signalling diagram illustrating transmission sequence for legacy network transmissions and D2D communication
- FIG. 6 is a schematic representation of subframe configuration according to a further feature of the present invention.
- FIG. 7 is a schematic representation of a mobile radio communications terminal device arranged to operate in accordance with an embodiment of the present invention.
- FIG. 8 is a conceptual diagram of “FIG. 5.4.3-1: Mapping to physical resource blocks for PUCCH” disclosed in section 5.4 of 3GPP TS 36.211.
- FIG. 1 there is provided a schematic representation of terminal devices within a cellular communication network environment 10 and comprising a base station device in the form of an eNB 12 , a first mobile radio communications terminal device such as a first UE 14 and a second such mobile radio communications device such as a second UE 16 .
- the first and second UEs 14 , 16 are arranged to exchange cellular uplink and downlink signalling with the eNB 12 by way of uplink and downlink control and shared channels in accordance with cellular communication functionality.
- the UEs 14 , 16 are also arranged for D2D communication with advantageously reduced/limited impact on the cellular network resources. Schematically illustrate therefore are uplink control/data channels PUCCH/PUSCH 18 for uplink control/data traffic from the first 14 and second 16 UEs to the eNB 12 .
- the UEs 14 , 16 are also arranged to form a UE pair for mutual D2D communication and, in this context, and on the basis of the concept of the present invention, D2D control information 22 , such as HARQ feedback signalling, can be exchanged between the two UEs 14 , 16 by way of a physical control channel, and D2D data can be exchanged 24 between the two UEs 14 , 16 by way of a physical shared data channel.
- D2D control information 22 such as HARQ feedback signalling
- P2D data can be exchanged 24 between the two UEs 14 , 16 by way of a physical shared data channel.
- Such control and data channels are specific to the D2D communications and within the present application are identified as P2CCH and P2SCH respectively.
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the invention can also be adopted in relation to UEs operating outside RAN coverage as discussed further herein but still allowing for the exchange of D2D data between a UE pair by way of unicast communication.
- the invention is advantageous in providing for management of the coexistence of legacy uplink channels PUCCH, PUSCH, and D2D channels P2CCH, P2SCH within the uplink band spectrum consisting of PUCCH and PUSCH.
- the invention allows for both UE devices within a D2D UEs pair to identify the location of radio resources in time and/or frequency, at which transmission/reception should be attempted in the uplink band so as to access the D2D control information related to that D2D UEs pair link.
- the invention allows for the cellular network node device, such as the eNB, to discriminate between transmissions on the legacy uplink channels from those on the D2D channels and, in general terms, allows for the reduction in potential interference between the channels and impact of one on the other.
- FIG. 2 and FIG. 3 there are illustrated schematic representations of the structure of adjacent subframes and related Resource Blocks providing for adoption of the P2CCH and P2SCH channels within the context of the present invention for D2D communication and particularly for coexistence with the legacy uplink control and shared data channels, PUCCH, PUSCH.
- the Resource Blocks considered in the frequency domain and within the adjacent subframes 26 , 28 , within their frequency spectrum, are divided between PUCCH channel element 30 , D2D P2CCH channel element 32 for D2D control information exchanges between the D2D UEs pair, a PUSCH channel 34 for cellular network data uplink exchanges, and a D2D P2SCH channel 36 for D2D data exchanges between that pair.
- FIG. 2 illustrates the coexistence between the uplink and D2D channels on a Frequency Division Multiplex basis such that Resource Blocks of the adjacent subsequent subframe 28 exhibit the same characteristics as the preceding subframe 26 .
- FIG. 3 there is provided similar structural diagram of adjacent subframes 38 , 40 within a series and again, by reference to the frequency spectrum, being divided between uplink control channel PUCCH portions 42 , D2D control channel P2CCH portions 44 and 46 , in this particular example, Uplink and/or D2D shared channels PUSCH/P2SCH for data exchanges.
- the structure of the subsequent subframe 40 mirrors that of the initial subframe 38 so as to represent a full FDM scenario within the uplink channel spectrum between the uplink and D2D control PUCCH/P2CCH and data PUSCH/P2SCH channels.
- FIG. 4 One particular example of an arrangement for arriving at an FDM subframe structure such as illustrated in particular with reference to FIG. 3 , is now described with reference to FIG. 4 .
- FIG. 4 illustrates in particular the adoption of new system parameters serving to define the location of the P2CCH channel for the D2D communication.
- this D2D control channel P2CCH is advantageously defined by way of two parameters, referenced to the frequency spectrum employed by uplink Resource Blocks and first comprising a frequency offset parameter by means of which the D2D control channel P2CCH is offset relative to the legacy uplink control channel PUCCH, and also the actual D2D control channel P2CCH bandwidth.
- Such parameters are shown in FIG. 4 which illustrates in the context of one subframe, a Resource Block 38 encompassing a frequency spectrum (not shown) in a vertical direction as illustrated in FIG. 3 and, as previously noted, employing uplink control channel portions 42 , D2D control channel portions 44 and shared general portion 46 for uplink and/or D2D data.
- the D2D control channel 44 is offset, in accordance with the frequency division multiplexing requirements, relative to the uplink control channel 42 .
- the second parameter comprises the bandwidth of the D2D control channel 44 which, in FIG. 4 is illustrated by double-headed arrow P2CCH_BW.
- the D2D parameters P2CCH_Off and P2CCH_BW serve to define the location, through frequency offset, and bandwidth, of each of the D2D control channels 44 .
- the remainder of the Resource Block spectrum then not employed by the UE respective uplink and D2D control channels 42 , 44 is available for the shared communication channel 46 .
- the alternative of FIG. 2 with respective FDM D2D and uplink shared data channels can be similarly employed.
- the parameters exhibited by the present invention can also be employed in accordance with different network radio coverage scenarios.
- the parameters tend to be unique to each cell and the values are provided to camped-on UEs through the radio resource control SIB signalling. That is, for intra-cell coverage where both of the D2D UEs pair are within the same cell, both UEs can compute the location of the Resource Blocks, and the number of allocated Resource Blocks to be used, by running an algorithm which can be such as that employed for identification of the Resource Blocks in the PUCCH channel, and adding the aforementioned P2CCH_Off value to the outcome.
- the D2D UEs pair are likely to have different values for the offset and bandwidth parameters duplet and so a common duplet should be identified.
- a common duplet can be defined by reference to the intersection of the two P2CCH zones, and the P2CCH_BW parameters can be advantageously employed for computing such a common duplet.
- the D2D UEs pair may also exhibit different values for the duplet, which can arise from pre-set values, or previously received values when under network coverage, and a similar procedure to that adopted in relation to the inter-cell coverage to determine a common duplet as discussed further below can be employed.
- a further feature of the invention relates to a procedure for a recipient UE in a D2D UEs pair to position/assign an appropriate P2CHH channel for the transfer of control information such as D2D HARQ feedback signalling.
- legacy algorithm and the associated assignment/location is known from legacy LTE systems such as disclosed in 3GPP Technical Specification TS 36.211 in section 5.4 the full content of which is incorporated herein by reference, and but for completeness, the principal sections are outlined below as follows:
- the block of complex-valued symbols z(i) shall be multiplied with the amplitude scaling factor ⁇ PUCCH in order to conform to the transmit power P PUCCH specified in Section 5.1.2.1 in [4], and mapped in sequence starting with z(0) to resource elements.
- PUCCH uses one resource block in each of the two slots in a subframe.
- the mapping of z(i) to resource elements (k,l) not used for transmission of reference signals shall be in increasing order of first k, then l and finally the slot number, starting with the first slot in the subframe.
- the physical resource blocks to be used for transmission of PUCCH in slot n s are given by
- one SC-FDMA symbol on PUCCH shall punctured.
- FIG. 8 is a conceptual diagram of “FIG. 5.4.3-1: Mapping to physical resource blocks for PUCCH” disclosed in section 5.4 of 3GPP TS 36.211
- the assigned/location of the required P2CCH is derived from the use of such known algorithm wherein both UEs in a D2D pair receive the assignment for the D2D transmission for data, and the UE receiving the data is arranged to run the aforementioned legacy algorithm which provides a “virtual” Resource Blocks location in the physical uplink control channel.
- the receiving UE can then add the aforementioned offset P2CCH_Off value to the outcome of the algorithm within the frequency spectrum as disclosed in relation to FIG. 4 so as to move to the “effective” computed Resources Blocks in the P2CCH zone.
- FIG. 5 represents a timing diagram within a frequency spectrum (vertical access but not specifically illustrated) encompassing both a downlink carrier and uplink carrier and also illustrating the UE Resource Blocks appearing within a series of subframes 50 , 52 , 54 relating, as noted, to both the legacy signalling and the D2D control and data channel P2CCH, P2SCH signalling within the legacy uplink spectrum.
- subframe 50 Within subframe 50 , and within the downlink carrier spectrum, there is provided a physical downlink channel 56 within which a eNB (not shown) assigns a Resource Block 58 for downlink traffic and within which the eNB also assigns a Resource Block 64 for D2D communication between first and second UEs of a D2D pair.
- the subframe 50 also includes a Resource Block 62 representing a downlink shared channel by means of which the eNB sends data 64 related to the RB assignment 58 to the UE.
- a downlink HARQ resource location algorithm is applied so as to identify a portion within PUCCH channel 66 employed by a first UE while sending HARQ feedback 68 on downlink reception at the first UE.
- a physical control channel 70 is calculated on the basis of the legacy algorithm as discussed above.
- the first UE sends D2D data 74 to the second UE within the D2D pair.
- the Resource Block structure within the subframe 54 there is again provided a physical uplink control channel 76 , and a physical control channel 78 , for D2D communication and associated shared data channel 80 .
- the adapted D2D HARQ resource location algorithm is applied to provide for the required HARQ signalling 82 on D2D reception.
- control channel signalling reference is made above to the HARQ mechanism, it should be appreciated that the subject matter of the present invention could equally be implemented in relation to any other required control information, such as for example CQI information.
- the present invention is not limited solely to D2D UE pairs operating D2D communication within the same cell, and inter-cell, or indeed out-of-coverage, adoption of the concept of the present invention can also be achieved.
- An appropriate interworking rule is proposed to cover embodiments relating to inter-cell, or out-of-coverage, D2D communication for a UE pair.
- the two UEs in the D2D pair do not exhibit the same duplet, i.e. offset value and/or control channel bandwidth, since they are camping on different cells.
- both UEs can be arranged to compute the intersection/overlap of their respective P2CCH zones to identify a common duplet and such feature is described further with reference to FIG. 6 .
- FIG. 6 illustrates Resource Block structures for first 84 , and second 86 UEs within a D2D UE pair, and both of which include functionality according to a feature of the present invention so as to provide for a virtual common Resource Block configuration 88 as illustrated.
- the basic structure illustrated within the sub-frames for each of the two UEs 84 , 86 is based upon a feature of an embodiment of the present invention illustrated with reference to FIG. 4 . As such, they provide for a FDM scheme within the frequency spectrum of the legacy uplink channel, and wherein the Resource Block structure includes uplink control channel zones, offset derived D2D control channel zones, and shared data channels for uplink and/or D2D communication as required.
- UE 84 exhibits an upper boundary for its D2D control channel equivalent to “offset 1+bandwidth 1”; and UE 86 exhibits an upper boundary for its D2D control channel P2CCH of “offset 2+bandwidth 2” where respective “offset 1”, 94 and “offset 2”, 96 are determined relative to the legacy uplink control channels PUCCH as discussed above.
- the upper boundary is determined as the minimum of the two values 90 , 92
- the lower boundary is determined as the maximum of the two offset values 94 , 96 and as illustrated by the dotted lines in FIG. 6 .
- FIG. 7 there is provided a schematic illustration of a mobile terminal device offering communication over cellular network and comprising for example, a UE 100 of a D2D UE pair.
- the UE 100 includes standard functionality such as a transmission/reception interface comprising an antenna 102 and transmission/reception circuitry 104 in addition to memory functionality 106 , processor functionality 108 and a user interface 110 .
- the processor functionality 108 includes means for achieving the required channel configuration according to the present invention so as to enable the D2D communication exchanges exhibiting the advantages presented by the invention. That is, the processor functionality 108 can be arranged to determine and/or apply parameter values arising in accordance with the present invention and serving to identify the frequency offset values and bandwidth values as discussed.
- the processor functionality 108 can be arranged to determine the aforementioned frequency offset value by reference to legacy algorithms determining initial physical Resource Blocks for control information transportation and applying the required frequency offset to the results obtained therefrom. In this manner, such D2D UE 100 can determine the location of the required physical Resource Blocks for the transport of D2D control information, although it should be appreciated here that other mathematical operation, i.e. sum, subtraction etc. can be employed.
- an eNB can broadcast its own cell parameter set. Also the eNB can broadcast a parameter set of neighbouring cells if required and which can prove useful for out-of-coverage embodiments as discussed above.
- SIB System Information Broadcast
- transport options include use of a discovery beacon to convey P2CCH parameters and/or the use of initial access signalling in legacy random access procedures such as the D2D UE pair exchanging initial access messaging including their specific P2CCH parameters.
- specific P2CCH parameter set data can be employed and also, if required, a camped-on cell identity can prove advantageous in allowing retrieval of a parameter set in the neighbouring cell P2CCH parameters within the SIB.
- X2 interface messages/parameters For network terminal node, e.g. eNB to eNB, signalling, use can be made of X2 interface messages/parameters which can also prove useful for building neighbouring cell P2CCH messages/parameters as required.
- the present invention provides for an advantageous scheme that can be readily embodied within a channel configuration procedure, terminal device operation procedure, and related computer program product, to advantageously allow for D2D capable UEs to determine which part of the legacy uplink band can be advantageously dynamically used for D2D, and P2CCH purposes in particular.
- P2CCH Frequency Offset employed to compute the frequency shifting from legacy PUCCH and hence get the P2CCH lower boundary if the offset is added to the PUCCH lower boundary
- P2CCH bandwidth employed to get the P2CCH upper boundary.
- a particular algorithm function can be employed for location of physical resource blocks for D2D physical control channel, and such proposed algorithm can be based on legacy LTE algorithm found in Technical Specification 36.211 as noted above.
- P2CCH Frequency Offset can be used to allow the D2D UEs to find physical resource blocks to transport D2D control information.
- other mathematical operation could be used such as sum, subtraction, etc.
- Suggested signalling options for P2CCH system parameters can comprise the use of RRC signalling to provide the proposed system parameters: SIB or dedicated RRC messages, and such parameters could also be pre-configured in the UEs: pre-set by the network operator in USIM or predefined by the 3GPP specifications.
- the signalling for such interworking can allow for the exchange of the proposed system parameters between eNB using X2 interface. Further, the proposed system parameters could also be exchanged between UEs using discovery beacons or legacy radio access signalling between D2D UEs.
- the efficient dynamic operation and assignment of D2D channel resources according to the present invention is achieved in a particular advantageous manner.
- radio interference between legacy PUCCH and P2CCH can readily be avoided by setting P2CCH_Off to create the right separation/distance between the two channels.
- P2CCH_Off can readily be avoided by setting P2CCH_Off to create the right separation/distance between the two channels.
- eNB scheduler through the persistent availability of cellular control signalling whose scheduling can be separated from D2D scheduling.
- a method of configuring a physical channel for device-to-device communication between mobile terminal devices within a cellular communications network environment comprising a step of locating a device-to-device control channel within a cellular uplink signalling spectrum, and applying a frequency offset parameter to determine separation of the device-to-device control channel from a cellular uplink control channel.
- a method as claimed in Supplementary note 1 or 2 and including the step of determining the frequency offset by reference to cellular network control channel.
- a method as claimed in any one or more of Supplementary notes 1-4, and location of the device-to-device control channel is determined within one of the said mobile terminal devices.
- a method of operating a mobile terminal device for device-to-device communication within a cellular network environment including, within the device, the step of locating a device-to device control channel within a cellular uplink spectrum, and applying a frequency offset parameter to determine separation of the device-to-device control channel from a cellular uplink control channel.
- a method as claimed in any one or more of Supplementary notes 15-17, wherein the step of determining device-to-device physical radio resource blocks from the frequency offset parameter comprises including an adaption of an algorithm employed for determining physical uplink control channel characteristics within the cellular network environment.
- a cellular communications network mobile terminal device arranged for device-to-device communication with a further mobile terminal device and arranged for locating a device-to-device control channel within a cellular uplink spectrum, and applying a frequency offset parameter to determine separation of the device-to-device control channel from a cellular uplink control channel.
- a terminal device as claimed in any one or more of Supplementary notes 25-28, and arranged to receive said parameters identifying the location of the device-to-device control channel by way of Radio Resource Control SIB or terminal dedicated messaging.
- a computer program product for a computer device comprising software code portions for performing the steps of any one of Supplementary notes 1-24 when said product is run on the computer device.
- a computer program product according to Supplementary note 31, wherein the computer program product comprises a computer-readable medium on which said software code portions are stored.
- a computer program product according to Supplementary note 31 or 32 wherein the computer program product is directly loadable into the internal memory of the computer device and/or transmittable via a network by means of at least one of upload, download and push procedures.
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Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/449,338 US10111218B2 (en) | 2014-01-31 | 2017-03-03 | Channel configuration in device-to-device communications |
US16/111,980 US10306623B2 (en) | 2014-01-31 | 2018-08-24 | Channel configuration in device-to-device communications |
US16/380,216 US10785766B2 (en) | 2014-01-31 | 2019-04-10 | Channel configuration in device-to-device communications |
US16/936,997 US10959220B2 (en) | 2014-01-31 | 2020-07-23 | Channel configuration in device-to-device communications |
US17/190,866 US11457438B2 (en) | 2014-01-31 | 2021-03-03 | Channel configuration in device-to-device communications |
US17/887,549 US11743920B2 (en) | 2014-01-31 | 2022-08-15 | Channel configuration in device-to-device communications |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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GB1401772.7A GB2522682B (en) | 2014-01-31 | 2014-01-31 | Channel configuration in device-to-device communications |
GB1401772.7 | 2014-01-31 | ||
PCT/JP2015/053317 WO2015115674A1 (en) | 2014-01-31 | 2015-01-30 | Channel configuration in device-to-device communications |
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CN107926005B (zh) * | 2015-08-13 | 2022-03-18 | 株式会社Ntt都科摩 | 用户装置及信号发送方法 |
EP3557809A1 (en) * | 2018-04-16 | 2019-10-23 | Volkswagen Aktiengesellschaft | Apparatuses, methods and computer programs for mobile transceivers to obtain a physical data channel configuration for direct communication |
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