WO2015113444A1 - Power control method in mixed cellular and d2d network and ue - Google Patents
Power control method in mixed cellular and d2d network and ue Download PDFInfo
- Publication number
- WO2015113444A1 WO2015113444A1 PCT/CN2014/093022 CN2014093022W WO2015113444A1 WO 2015113444 A1 WO2015113444 A1 WO 2015113444A1 CN 2014093022 W CN2014093022 W CN 2014093022W WO 2015113444 A1 WO2015113444 A1 WO 2015113444A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- neighboring
- cell
- neighboring cells
- serving cell
- power control
- Prior art date
Links
Images
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
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
-
- 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
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
-
- 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
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/246—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where the output power of a terminal is based on a path parameter calculated in said terminal
-
- 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
-
- 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
- H04W52/38—TPC being performed in particular situations
- H04W52/383—TPC being performed in particular situations power control in peer-to-peer links
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/18—Interfaces between hierarchically similar devices between terminal devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
-
- 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
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
-
- 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
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/245—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account received signal strength
Definitions
- the present disclosure generally relates to the technical field of mobile communication systems, and particularly, to a power control method performed by a User Equipment (UE) in a mixed cellular and device-to-device (D2D) network and the UE.
- UE User Equipment
- D2D device-to-device
- IP Internet Protocol
- 3GPP 3 rd Generation Partnership Project
- LTE Long Term Evolution
- IP Internet Protocol
- One of the important use cases for the local IP access and local connectivity involves a so-called D2D communication mode, wherein UEs in close proximity (typically less than a few tens of meters, but sometimes up to a few hundred meters) communicate with each other directly.
- D2D UEs are much closer to each other than cellular UEs that have to communicate via at least one cellular access point (e.g., an eNodeB (eNB) )
- eNB eNodeB
- the D2D communication enables a number of potential gains over the traditional cellular technique, including capacity gain, peak rate gain, and latency gain.
- the capacity gain may be achieved, for example, by reusing radio resources (e.g., Orthogonal Frequency Division Multiplexing (OFDM) resource blocks) between D2D and cellular communications and by reducing the number of links between UEs from two to one and accordingly reducing the radio resources required for one link.
- radio resources e.g., Orthogonal Frequency Division Multiplexing (OFDM) resource blocks
- the peak rate gain directly results from the relatively short distance between D2D UEs and the potentially favorable propagation condition therebetween.
- the latency gain is also a direct result of the single relatively short link between D2D UEs.
- Fig. 1 illustrates an example of a mixed cellular and D2D network according to the prior art, wherein UE 101 is a cellular UE which communicates via an eNB 110, whereas UEs 102 and 103 are D2D UEs which communicate with each other directly. UE 101 may be also a D2D UE, which communicates with other D2D UEs such as UE 103.
- D2D communications share radio resources with UL cellular communications, and a Time Division Multiplexing (TDM) is used for dividing resources between cellular communications and D2D communications, so as to avoid collision.
- TDM Time Division Multiplexing
- Fig. 2 illustrates an example TDM based cellular/D2D resource division.
- cellular regions and D2D regions are separated in time domain within a cell.
- the resource division may be known by each D2D UE via system broadcast information.
- each UE may select resource for D2D transmission.
- the D2D resource pool within cell 1 could collide with the cellular resource pool in cell 2, thereby leading to inter-system interference between the two cells.
- Fig. 3 illustrates simulations for cellular capacity versus D2D capacity via the TDM solution in different scenarios, where Case 1 ⁇ 500m ISD, uniformly outdoor; Case 2: 1732m ISD, uniformly outdoor.
- An object of the present disclosure is to provide solutions to alleviate inter-system interference from D2D communications to cellular communications in an asynchronous scenario.
- a power control method performed by a UE in a mixed cellular and D2D network.
- the method includes: obtaining one or more power control related parameters for each of one or more neighboring cells of a serving cell for the UE from the serving cell or the neighboring cell.
- the one or more neighboring cells are asynchronous with the serving cell.
- the method further includes adapting a D2D transmission power of the UE based on the obtained power control related parameters so as to reduce interference from the UE to cellular transmission of the one or more neighboring cells.
- a UE in a mixed cellular and D2D network for power control includes an obtaining unit configured to obtain one or more power control related parameters for each of one or more neighboring cells of a serving cell for the UE from the serving cell or the neighboring cell.
- the one or more neighboring cells are asynchronous with the serving cell.
- the UE further includes an adapting unit configured to adapt a D2D transmission power of the UE based on the obtained power control related parameters so as to reduce interference from the UE to cellular transmission of the one or more neighboring cells.
- a UE in a mixed cellular and D2D network for power control includes: a processor; and a memory including instructions which, when executed by said processor, cause said UE to: obtain one or more power control related parameters for each of one or more neighboring cells of a serving cell for the UE from the serving cell or the neighboring cell, the one or more neighboring cells being asynchronous with the serving cell; and adapt a D2D transmission power of the UE based on the obtained power control related parameters so as to reduce interference from the UE to cellular transmission of the one or more neighboring cells.
- a computer program product storing instructions that when executed, cause one or more computing devices to perform the method of the first aspect.
- inter-system interference from D2D communications to cellular communications in an asynchronous scenario can be reduced.
- Fig. 1 is a diagram illustrating a mixed cellular and D2D network according to the prior art
- Fig. 2 is a diagram illustrating an example TDM based cellular/D2D resource division
- Fig. 3 illustrates simulations for cellular capacity versus D2D capacity via the TDM solution in different scenarios according to the prior art
- Fig. 4 is a diagram illustrating an example mixed cellular and D2D scenario of the mixed cellular and D2D network as shown in Fig. 1, where the present disclosure may be applied;
- Fig. 5 is a flowchart illustrating a power control method 500 according to some embodiments of the present disclosure
- Fig. 6 is a flowchart illustrating another power control method 600 according to some embodiments of the present disclosure.
- Fig. 7 is a diagram illustrating simulation results for comparing mixed cellular and D2D cases with/without power control according to the present disclosure in different scenarios;
- Fig. 8 is a schematic block diagram of a UE 800 according to some embodiments of the present disclosure.
- Fig. 9 schematically shows an embodiment of an arrangement 900 which may be used in the UE 800.
- Fig. 4 schematically illustrates an example mixed cellular and D2D scenario of the mixed cellular and D2D network as shown in Fig. 1, where the present disclosure may be applied.
- eNB 101 and UE 201 are distributed in Cell 1,and four cells, i.e., Cells 2-4, which are served by eNBs 102-105 respectively, are geographically close to Cell 1.
- Fig. 4 is exemplified in the context of one UE and five cells, any other number of UEs and any other number of cells may be also applied here.
- D2D communications of UE 201 may cause interference to cellular communications of neighboring cells, e.g., one or more of Cells 2-4 in Fig. 4.
- the present disclosure is proposed to alleviate such interference by adapting D2D transmission power of UE 201.
- Fig. 5 is a flowchart schematically illustrating a power control method 500 performed by a UE, such as UE 201 in Fig. 4, in a mixed cellular and D2D network (e.g., the mixed cellular and D2D network as shown in Fig. 4) according to some embodiments of the present disclosure.
- a UE such as UE 201 in Fig. 4
- a mixed cellular and D2D network e.g., the mixed cellular and D2D network as shown in Fig. 4
- the UE obtains one or more power control related parameters for each of one or more neighboring cells of a serving cell for the UE from the serving cell or the neighboring cell.
- the one or more neighboring cells are asynchronous with the serving cell.
- the one or more power control related parameters for each of the one or more neighboring cells can be obtained from the serving cell via system broadcast information such as System Information Block (SlB) of the serving cell.
- system broadcast information such as System Information Block (SlB) of the serving cell.
- RRC Radio Resource Control
- the one or more power control related parameters for each of the one or more neighboring cells can be obtained from the neighboring cell via system broadcast information such as SlB of the neighboring cell.
- the UE adapts a D2D transmission power of the UE based on the obtained power control related parameters so as to reduce interference from the UE to cellular transmission of the one or more neighboring cells.
- the method 500 may optionally include step S530, where the UE identifies the one or more neighboring cells which are asynchronous with the serving cell.
- the UE receives a neighboring cell list from the serving cell; and for each neighboring cell in the neighboring cell list: comparing a starting time of a frame between the neighboring cell and the serving cell; and determining whether the neighboring cell is asynchronous with the serving cell based on the comparison.
- step S530 Another feasible manner to implement step S530 is to receive from the serving cell an indication indicating the one or more neighboring cells.
- One major advantage with the method 500 is that interference from D2D communications to cellular communications can be reduced by adapting D2D transmission power.
- Fig. 6 is a flowchart schematically illustrating another power control method 600 performed by a UE, such as UE 201 in Fig. 4, in a mixed cellular and D2D network (e.g., the mixed cellular and D2D network as shown in Fig. 4) according to some embodiments of the present disclosure.
- a UE such as UE 201 in Fig. 4
- a mixed cellular and D2D network e.g., the mixed cellular and D2D network as shown in Fig. 4
- the UE obtains one or more power control related parameters for each of one or more neighboring cells of a serving cell for the UE from the serving cell or the neighboring cell.
- the one or more neighboring cells are asynchronous with the serving cell.
- Step S610 is substantially equivalent to step S510, and thus detailed description thereof will be omitted.
- the method 600 may further include a step of identifying the one or more neighboring cells which are asynchronous with the serving cell (not shown) . Such a step is substantially equivalent to step S530, and thus detailed description thereof will be omitted.
- the one or more power control related parameters include an acceptable interference threshold of the neighboring cell, denoted as Power_mask, and Reference Signal (RS) related information of the neighboring cell.
- RS related information of each neighboring cell may include transmission power of the corresponding cell and RS format of the RS, which may be used to assist the UE in measuring a signal quality of the neighboring cell.
- the one or more power control related parameters may include information on cell ID of each of the one or more neighboring cells.
- the UE measures a signal quality of the neighboring cell based on the RS related information of the neighboring cell.
- the signal quality may be indicated by Reference Signal Receiving Power (RSRP) , Reference Signal Receiving Quality (RSRQ) or Channel Quality Indicator (CQI) of the RS. It should be noted that the measurement of the signal quality may be implemented by means of the existing approaches, e.g., those specified in 3GPP standards.
- the UE calculates a path loss, denoted as PL, between the UE and the neighboring cell based on the measured signal quality.
- PL may be calculated based on the measured signal quality and transmission power of the RS.
- the UE calculates a product of an acceptable interference threshold and the path loss for the neighboring cell.
- steps S620-640 are performed for each of the one or more neighboring cells which are asynchronous with the serving cell.
- the UE controls D2D transmission power of the UE to be smaller than the minimum one among all the respective products for the one or more neighboring cells.
- Power_mask [i] and PL [i] correspond to an acceptable interference threshold and a path loss of the neighboring cell, respectively.
- the D2D transmission power of the UE may be controlled to be smaller than the min ⁇ Power_mask [i] *P L [i] ⁇ .
- the method 600 can efficiently reduce interference from D2D communications to cellular communications of neighboring cell (s) . This may be embodied in Fig. 7.
- Fig. 7 is a diagram illustrating simulation results for comparing mixed cellular and D2D cases with/without power control according to the present disclosure in different scenarios.
- a solid line represents a case without power control
- a slash line represents a case with inter-cell power control (having an interference threshold as-112 dBm)
- a dot-slash line represents a case with inter-cell power control (having an interference threshold as-122 dBm) . From the simulation results, it can be seen that cellular performance can be improved for cases with power control in comparison with cases without power control.
- Fig. 8 is a schematic block diagram of a UE 800 in a mixed cellular and D2D network for power control according to some embodiments of the present disclosure.
- the part of the UE 800 which is most affected by the adaptation to the herein described method, e.g., the method 500 or 600, is illustrated as an arrangement 801, surrounded by a dashed line.
- the UE 800 could be e.g. a mobile terminal, depending on in which type of communication system it is operable, e.g., LTE-type systems.
- the UE 800 may be configured for operation with, for example, an LTE network, formally known as the Evolved Universal Terrestrial Radio Access Network (E-UTRAN) .
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- the UE 800 and arrangement 801 are further configured to communicate with other entities via a communication unit 802 which may be regarded as part of the arrangement 801.
- the communication unit 802 comprises means for wireless communication, such as an antenna.
- the arrangement 801 or UE 800 may further include other functional units 804, such as functional units providing regular UE functions, and may further comprise one or more storage units or memory 803 for storing computer program code and other information thereon.
- the memory 803 may comprise one or several types of memory such as read-only memory (ROM) , random-access memory, cache memory, flash memory devices, optical storage devices, etc.
- the arrangement 801 could be implemented, e.g., by one or more of: a processor or a micro processor and adequate software and memory for storing of the software, a Programmable Logic Device (PLD) or other electronic component (s) or processing circuitry configured to perform the actions described above, and illustrated, e.g., in Fig. 5 or 6.
- PLD Programmable Logic Device
- the arrangement part of the UE 800 may be implemented and/or described as follows.
- the UE 800 may include an obtaining unit 810, an adapting unit 820, a measuring unit 830, a calculating unit 840, and an identifying unit 850.
- the measuring unit 830, the calculating unit 840, and the identifying unit 850 are optional.
- the obtaining unit 810 may obtain one or more power control related parameters for each of one or more neighboring cells of a serving cell for the UE from the serving cell or the neighboring cell.
- the one or more neighboring cells are asynchronous with the serving cell.
- the obtaining unit 810 may obtain the one or more power control related parameters for each of the one or more neighboring cells from the serving cell via system broadcast information such as SIB of the neighboring cell.
- the one or more power control related parameters for each of the one or more neighboring cells can be obtained from the serving cell via RRC signaling in advance.
- the obtaining unit 810 may obtain the one or more power control related parameters for each of the one or more neighboring cells from the neighboring cell via system broadcast information such as SIB of the neighboring cell.
- the adapting unit 820 may adapt a D2D transmission power of the UE based on the obtained power control related parameters so as to reduce interference from the UE to cellular transmission of the one or more neighboring cells.
- the one or more power control related parameters include an acceptable interference threshold of the neighboring cell and RS related information of the neighboring cell.
- the measuring unit 830 may, for each of the one or more neighboring cells, measure a signal quality of the neighboring cell based on RS related information of the neighboring cell.
- the signal quality may be indicated by RSRP, RSRQ or CQI of the RS.
- the calculating unit 840 may calculate a path loss between the UE and the neighboring cell based on the measured signal quality, and calculate a product of an acceptable interference threshold and the path loss for the neighboring cell.
- the adapting unit 820 may further control the D2D transmission power of the UE to be smaller than the minimum one among all the respective products for the one or more neighboring cells.
- the identifying unit 850 may identify the one or more neighboring cells which are asynchronous with the serving cell.
- the identifying unit 850 may identify the one or more neighboring cells by: receiving a neighboring cell list from the serving cell; and for each neighboring cell in the neighboring cell list: comparing starting time of a frame between the neighboring cell and the serving cell; and determining whether the neighboring cell is asynchronous with the serving cell based on the comparison.
- the identifying unit 850 may identify the one or more neighboring cells by receiving from the serving cell an indication indicating the one or more neighboring cells.
- the adapting unit 820 and the calculating unit 840 may be combined as one single unit.
- Fig. 9 schematically shows an embodiment of an arrangement 900 which may be used in the UE 800.
- a processing unit 906 e.g., with a Digital Signal Processor (DSP) .
- the processing unit 906 may be a single unit or a plurality of units to perform different actions of procedures described herein.
- the arrangement 900 may also comprise an input unit 902 for receiving signals from other entities, and an output unit 904 for providing signal (s) to other entities.
- the input unit and the output unit may be arranged as an integrated entity or as illustrated in the example of Fig. 8.
- the arrangement 900 comprises at least one computer program product (or computer-readable storage medium) 908 in the form of a non-volatile or volatile memory, e.g., an Electrically Erasable Programmable Read-Only Memory (EEPROM) , a flash memory and a hard drive.
- the computer program product 908 comprises a computer program 910, which comprises code/computer readable instructions, which when executed by the processing unit 906 in the arrangement 900 cause the arrangement 900 and/or the UE in which it is comprised to perform the actions, e.g., of the procedure described earlier in conjunction with Fig. 5 or 6.
- the computer program 910 may be configured as a computer program code structured in computer program modules 910A and 910B and optional 910C-910E.
- the code in the computer program of the arrangement 900 includes an obtaining module 910A, for obtaining one or more power control related parameters for each of one or more neighboring cells of a serving cell for the UE from the serving cell or the neighboring cell.
- the one or more neighboring cells are asynchronous with the serving cell.
- the code in the computer program 910 further includes an adapting module 910B, for adapting a D2D transmission power of the UE based on the obtained power control related parameters so as to reduce interference from the UE to cellular transmission of the one or more neighboring cells.
- the code in the computer program 910 further includes a measuring module 910C for, for each of the one or more neighboring cells, measuring a signal quality of the neighboring cell based on RS related information of the neighboring cell.
- the code in the computer program 910 further includes a calculating module 910D for, calculating a path loss between the UE and the neighboring cell based on the measured signal quality, and calculating a product of an acceptable interference threshold and the path loss for the neighboring cell.
- the code in the computer program 910 further includes an identifying module 910E for, identifying the one or more neighboring cells which are asynchronous with the serving cell.
- the computer program modules could essentially perform the actions of the flow illustrated in Fig. 5 or 6, to emulate the arrangement 801 in the UE 800.
- the different computer program modules when executed in the processing unit 906, they may correspond, e.g., to the units 810 -850 of Fig. 8, respectively.
- code means in the embodiments disclosed above in conjunction with Fig. 9 are implemented as computer program modules which when executed in the processing unit causes the device to perform the actions described above in conjunction with the figures mentioned above, at least one of the code means may in alternative embodiments be implemented at least partly as hardware circuits.
- the processor may be a single CPU (Central processing unit) , but could also comprise two or more processing units.
- the processor may include general purpose microprocessors; instruction set processors and/or related chips sets and/or special purpose microprocessors such as Application Specific Integrated Circuit (ASICs) .
- the processor may also comprise board memory for caching purposes.
- the computer program may be carried by a computer program product connected to the processor.
- the computer program product may comprise a computer readable medium on which the computer program is stored.
- the computer program product may be a flash memory, a Random-access memory (RAM) , a Read-Only Memory (ROM) , or an EEPROM, and the computer program modules described above could in alternative embodiments be distributed on different computer program products in the form of memories within the UE.
- RAM Random-access memory
- ROM Read-Only Memory
- EEPROM Electrically Erasable programmable read-only memory
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present disclosure discloses a power control method performed by a User Equipment (UE) in a mixed cellular and device-to-device (D2D) network and the UE. The method comprises obtaining one or more power control related parameters for each of one or more neighboring cells of a serving cell for the UE from the serving cell or the neighboring cell. The one or more neighboring cells are asynchronous with the serving cell. The method further comprises adapting a D2D transmission power of the UE based on the obtained power control related parameters so as to reduce interference from the UE to cellular transmission of the one or more neighboring cells.
Description
The present disclosure generally relates to the technical field of mobile communication systems, and particularly, to a power control method performed by a User Equipment (UE) in a mixed cellular and device-to-device (D2D) network and the UE.
This section is intended to provide a background to the various embodiments of the technology described in this disclosure. The description in this section may include concepts that could be pursued, but are not necessarily ones that have been previously conceived or pursued. Therefore, unless otherwise indicated herein, what is described in this section is not prior art to the description and/or claims of this disclosure and is not admitted to be prior art by the mere inclusion in this section.
Recent developments of the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) facilitate accessing local Internet Protocol (IP) -based services in various places, such as at home, office, or public hot spots, or even in outdoor environments. One of the important use cases for the local IP access and local connectivity involves a so-called D2D communication mode, wherein UEs in close proximity (typically less than a few tens of meters, but sometimes up to a few hundred meters) communicate with each other directly.
As discussed in Reference 1 (G. Fodor, G. Mildh, E. Dahlman and S. Parkvall, “Network Assisted D2D Communications in LTE” , FRA Seminar material, December 2010) , because D2D UEs are much closer to each other than cellular UEs that have to communicate via at least one cellular access point (e.g., an eNodeB (eNB) ) , the D2D communication enables a number of potential gains over
the traditional cellular technique, including capacity gain, peak rate gain, and latency gain.
The capacity gain may be achieved, for example, by reusing radio resources (e.g., Orthogonal Frequency Division Multiplexing (OFDM) resource blocks) between D2D and cellular communications and by reducing the number of links between UEs from two to one and accordingly reducing the radio resources required for one link. The peak rate gain directly results from the relatively short distance between D2D UEs and the potentially favorable propagation condition therebetween. The latency gain is also a direct result of the single relatively short link between D2D UEs.
Fig. 1 illustrates an example of a mixed cellular and D2D network according to the prior art, wherein UE 101 is a cellular UE which communicates via an eNB 110, whereas UEs 102 and 103 are D2D UEs which communicate with each other directly. UE 101 may be also a D2D UE, which communicates with other D2D UEs such as UE 103. As Reference 1 suggests, in such a mixed cellular and D2D network, D2D communications share radio resources with UL cellular communications, and a Time Division Multiplexing (TDM) is used for dividing resources between cellular communications and D2D communications, so as to avoid collision.
Fig. 2 illustrates an example TDM based cellular/D2D resource division. As shown in Fig. 2, cellular regions and D2D regions are separated in time domain within a cell. It should be noted that the resource division may be known by each D2D UE via system broadcast information. Within the allocated D2D resource pool, each UE may select resource for D2D transmission. However, since it is possible that different cells are asynchronous with each other, the D2D resource pool within cell 1 could collide with the cellular resource pool in cell 2, thereby leading to inter-system interference between the two cells.
However, if there is no inter-cell synchronization (if considering intra-cell synchronization can be easily achieved, between intra-cell sectors) , there would be still inter-system (cellular and D2D system) interference among neighboring cells.
Fig. 3 illustrates simulations for cellular capacity versus D2D capacity via the TDM solution in different scenarios, where Case 1∶500m ISD, uniformly outdoor; Case 2: 1732m ISD, uniformly outdoor.
From the simulations, it can be seen that the inter-system interference would cause dramatically drop of cellular throughput in dense network scenario (500m ISD, uniformly outdoor UE deployment) .
SUMMARY
An object of the present disclosure is to provide solutions to alleviate inter-system interference from D2D communications to cellular communications in an asynchronous scenario.
According to a first aspect of the disclosure, there is provided a power control method performed by a UE in a mixed cellular and D2D network. The method includes: obtaining one or more power control related parameters for each of one or more neighboring cells of a serving cell for the UE from the serving cell or the neighboring cell. The one or more neighboring cells are asynchronous with the serving cell. The method further includes adapting a D2D transmission power of the UE based on the obtained power control related parameters so as to reduce interference from the UE to cellular transmission of the one or more neighboring cells.
According to a second aspect of the disclosure, there is provided a UE in a mixed cellular and D2D network for power control. The UE includes an obtaining unit configured to obtain one or more power control related parameters for each of one
or more neighboring cells of a serving cell for the UE from the serving cell or the neighboring cell. The one or more neighboring cells are asynchronous with the serving cell. The UE further includes an adapting unit configured to adapt a D2D transmission power of the UE based on the obtained power control related parameters so as to reduce interference from the UE to cellular transmission of the one or more neighboring cells.
According to a third aspect of the disclosure, there is provided a UE in a mixed cellular and D2D network for power control. The UE includes: a processor; and a memory including instructions which, when executed by said processor, cause said UE to: obtain one or more power control related parameters for each of one or more neighboring cells of a serving cell for the UE from the serving cell or the neighboring cell, the one or more neighboring cells being asynchronous with the serving cell; and adapt a D2D transmission power of the UE based on the obtained power control related parameters so as to reduce interference from the UE to cellular transmission of the one or more neighboring cells.
According to a fourth aspect of the disclosure, there is provided a computer program product storing instructions that when executed, cause one or more computing devices to perform the method of the first aspect.
According to the first to fourth aspects of the disclosure, inter-system interference from D2D communications to cellular communications in an asynchronous scenario can be reduced.
The above and other objects, features, and advantages of the present disclosure will become apparent from the following descriptions on embodiments of the present disclosure with reference to the drawings, in which:
Fig. 1 is a diagram illustrating a mixed cellular and D2D network according to the prior art;
Fig. 2 is a diagram illustrating an example TDM based cellular/D2D resource division;
Fig. 3 illustrates simulations for cellular capacity versus D2D capacity via the TDM solution in different scenarios according to the prior art;
Fig. 4 is a diagram illustrating an example mixed cellular and D2D scenario of the mixed cellular and D2D network as shown in Fig. 1, where the present disclosure may be applied;
Fig. 5 is a flowchart illustrating a power control method 500 according to some embodiments of the present disclosure;
Fig. 6 is a flowchart illustrating another power control method 600 according to some embodiments of the present disclosure;
Fig. 7 is a diagram illustrating simulation results for comparing mixed cellular and D2D cases with/without power control according to the present disclosure in different scenarios;
Fig. 8 is a schematic block diagram of a UE 800 according to some embodiments of the present disclosure; and
Fig. 9 schematically shows an embodiment of an arrangement 900 which may be used in the UE 800.
DETAILED DESCRIPTION OF EMBODIMENTS
Hereinafter, the present disclosure is described with reference to embodiments shown in the attached drawings. However, it is to be understood that those descriptions are just provided for illustrative purpose, rather than limiting the present disclosure. Further, in the following, descriptions of known structures and techniques are omitted so as not to unnecessarily obscure the concept of the present disclosure.
Fig. 4 schematically illustrates an example mixed cellular and D2D scenario of the mixed cellular and D2D network as shown in Fig. 1, where the present disclosure may be applied. As illustrated in Fig. 4, eNB 101 and UE 201 are distributed in Cell 1,and four cells, i.e., Cells 2-4, which are served by eNBs 102-105 respectively,
are geographically close to Cell 1. Although Fig. 4 is exemplified in the context of one UE and five cells, any other number of UEs and any other number of cells may be also applied here.
As mentioned in the above, D2D communications of UE 201 may cause interference to cellular communications of neighboring cells, e.g., one or more of Cells 2-4 in Fig. 4.
The present disclosure is proposed to alleviate such interference by adapting D2D transmission power of UE 201.
Fig. 5 is a flowchart schematically illustrating a power control method 500 performed by a UE, such as UE 201 in Fig. 4, in a mixed cellular and D2D network (e.g., the mixed cellular and D2D network as shown in Fig. 4) according to some embodiments of the present disclosure.
At step S510, the UE obtains one or more power control related parameters for each of one or more neighboring cells of a serving cell for the UE from the serving cell or the neighboring cell. The one or more neighboring cells are asynchronous with the serving cell.
In an implementation, the one or more power control related parameters for each of the one or more neighboring cells can be obtained from the serving cell via system broadcast information such as System Information Block (SlB) of the serving cell. Alternatively, the one or more power control related parameters for each of the one or more neighboring cells can be obtained from the serving cell via Radio Resource Control (RRC) signaling. This may be performed in advance.
In another implementation, the one or more power control related parameters for each of the one or more neighboring cells can be obtained from the neighboring cell via system broadcast information such as SlB of the neighboring cell.
At step S520, the UE adapts a D2D transmission power of the UE based on the obtained power control related parameters so as to reduce interference from the UE to cellular transmission of the one or more neighboring cells.
Before step S510, the method 500 may optionally include step S530, where the UE identifies the one or more neighboring cells which are asynchronous with the serving cell.
As a feasible manner to implement step S530, the UE receives a neighboring cell list from the serving cell; and for each neighboring cell in the neighboring cell list: comparing a starting time of a frame between the neighboring cell and the serving cell; and determining whether the neighboring cell is asynchronous with the serving cell based on the comparison.
Another feasible manner to implement step S530 is to receive from the serving cell an indication indicating the one or more neighboring cells.
One major advantage with the method 500 is that interference from D2D communications to cellular communications can be reduced by adapting D2D transmission power.
Fig. 6 is a flowchart schematically illustrating another power control method 600 performed by a UE, such as UE 201 in Fig. 4, in a mixed cellular and D2D network (e.g., the mixed cellular and D2D network as shown in Fig. 4) according to some embodiments of the present disclosure.
At step S610, the UE obtains one or more power control related parameters for each of one or more neighboring cells of a serving cell for the UE from the serving cell or the neighboring cell. The one or more neighboring cells are asynchronous with the serving cell. Step S610 is substantially equivalent to step S510, and thus detailed description thereof will be omitted. Similarly, before step S610, the
method 600 may further include a step of identifying the one or more neighboring cells which are asynchronous with the serving cell (not shown) . Such a step is substantially equivalent to step S530, and thus detailed description thereof will be omitted.
For each of the one or more neighboring cells, the one or more power control related parameters include an acceptable interference threshold of the neighboring cell, denoted as Power_mask, and Reference Signal (RS) related information of the neighboring cell. RS related information of each neighboring cell may include transmission power of the corresponding cell and RS format of the RS, which may be used to assist the UE in measuring a signal quality of the neighboring cell. Alternatively, the one or more power control related parameters may include information on cell ID of each of the one or more neighboring cells.
At step S620, for each of the one or more neighboring cells, the UE measures a signal quality of the neighboring cell based on the RS related information of the neighboring cell. The signal quality may be indicated by Reference Signal Receiving Power (RSRP) , Reference Signal Receiving Quality (RSRQ) or Channel Quality Indicator (CQI) of the RS. It should be noted that the measurement of the signal quality may be implemented by means of the existing approaches, e.g., those specified in 3GPP standards.
At step S630, the UE calculates a path loss, denoted as PL, between the UE and the neighboring cell based on the measured signal quality. For example, PL may be calculated based on the measured signal quality and transmission power of the RS.
At step S640, the UE calculates a product of an acceptable interference threshold and the path loss for the neighboring cell.
It should be noted that steps S620-640 are performed for each of the one or more
neighboring cells which are asynchronous with the serving cell.
At step 650, the UE controls D2D transmission power of the UE to be smaller than the minimum one among all the respective products for the one or more neighboring cells.
Assuming i is a cell ID index for one neighboring cell of the one or more neighboring cells which are asynchronous with the serving cell, where i is a positive integer not larger than the number of the one or more neighboring cells, then Power_mask [i] and PL [i] correspond to an acceptable interference threshold and a path loss of the neighboring cell, respectively. In this case, the D2D transmission power of the UE may be controlled to be smaller than the min {Power_mask [i] *P L [i] } .
Apparently, the method 600 can efficiently reduce interference from D2D communications to cellular communications of neighboring cell (s) . This may be embodied in Fig. 7.
Fig. 7 is a diagram illustrating simulation results for comparing mixed cellular and D2D cases with/without power control according to the present disclosure in different scenarios. In Fig. 7, a solid line represents a case without power control, a slash line represents a case with inter-cell power control (having an interference threshold as-112 dBm) , and a dot-slash line represents a case with inter-cell power control (having an interference threshold as-122 dBm) . From the simulation results, it can be seen that cellular performance can be improved for cases with power control in comparison with cases without power control.
Fig. 8 is a schematic block diagram of a UE 800 in a mixed cellular and D2D network for power control according to some embodiments of the present disclosure.
The part of the UE 800 which is most affected by the adaptation to the herein described method, e.g., the method 500 or 600, is illustrated as an arrangement 801, surrounded by a dashed line. The UE 800 could be e.g. a mobile terminal, depending on in which type of communication system it is operable, e.g., LTE-type systems. For example, the UE 800 may be configured for operation with, for example, an LTE network, formally known as the Evolved Universal Terrestrial Radio Access Network (E-UTRAN) . The UE 800 and arrangement 801 are further configured to communicate with other entities via a communication unit 802 which may be regarded as part of the arrangement 801. The communication unit 802 comprises means for wireless communication, such as an antenna. The arrangement 801 or UE 800 may further include other functional units 804, such as functional units providing regular UE functions, and may further comprise one or more storage units or memory 803 for storing computer program code and other information thereon. The memory 803 may comprise one or several types of memory such as read-only memory (ROM) , random-access memory, cache memory, flash memory devices, optical storage devices, etc.
The arrangement 801 could be implemented, e.g., by one or more of: a processor or a micro processor and adequate software and memory for storing of the software, a Programmable Logic Device (PLD) or other electronic component (s) or processing circuitry configured to perform the actions described above, and illustrated, e.g., in Fig. 5 or 6. The arrangement part of the UE 800 may be implemented and/or described as follows.
Referring to Fig. 8, the UE 800 may include an obtaining unit 810, an adapting unit 820, a measuring unit 830, a calculating unit 840, and an identifying unit 850. The measuring unit 830, the calculating unit 840, and the identifying unit 850 are optional.
The obtaining unit 810 may obtain one or more power control related parameters for each of one or more neighboring cells of a serving cell for the UE from the
serving cell or the neighboring cell. The one or more neighboring cells are asynchronous with the serving cell.
In an implementation, the obtaining unit 810 may obtain the one or more power control related parameters for each of the one or more neighboring cells from the serving cell via system broadcast information such as SIB of the neighboring cell. Alternatively, the one or more power control related parameters for each of the one or more neighboring cells can be obtained from the serving cell via RRC signaling in advance.
In another implementation, the obtaining unit 810 may obtain the one or more power control related parameters for each of the one or more neighboring cells from the neighboring cell via system broadcast information such as SIB of the neighboring cell.
The adapting unit 820 may adapt a D2D transmission power of the UE based on the obtained power control related parameters so as to reduce interference from the UE to cellular transmission of the one or more neighboring cells.
For each of the one or more neighboring cells, the one or more power control related parameters include an acceptable interference threshold of the neighboring cell and RS related information of the neighboring cell.
The measuring unit 830 may, for each of the one or more neighboring cells, measure a signal quality of the neighboring cell based on RS related information of the neighboring cell. For example, the signal quality may be indicated by RSRP, RSRQ or CQI of the RS.
The calculating unit 840 may calculate a path loss between the UE and the neighboring cell based on the measured signal quality, and calculate a product of an acceptable interference threshold and the path loss for the neighboring cell.
The adapting unit 820 may further control the D2D transmission power of the UE to be smaller than the minimum one among all the respective products for the one or more neighboring cells.
The identifying unit 850 may identify the one or more neighboring cells which are asynchronous with the serving cell.
In an implementation, the identifying unit 850 may identify the one or more neighboring cells by: receiving a neighboring cell list from the serving cell; and for each neighboring cell in the neighboring cell list: comparing starting time of a frame between the neighboring cell and the serving cell; and determining whether the neighboring cell is asynchronous with the serving cell based on the comparison.
In another implementation, the identifying unit 850 may identify the one or more neighboring cells by receiving from the serving cell an indication indicating the one or more neighboring cells.
It should be noted that two or more different units in this disclosure may be logically or physically combined. For example, the adapting unit 820 and the calculating unit 840 may be combined as one single unit.
Fig. 9 schematically shows an embodiment of an arrangement 900 which may be used in the UE 800. Comprised in the arrangement 900 is here a processing unit 906, e.g., with a Digital Signal Processor (DSP) . The processing unit 906 may be a single unit or a plurality of units to perform different actions of procedures described herein. The arrangement 900 may also comprise an input unit 902 for receiving signals from other entities, and an output unit 904 for providing signal (s) to other entities. The input unit and the output unit may be arranged as an integrated entity or as illustrated in the example of Fig. 8.
Furthermore, the arrangement 900 comprises at least one computer program product (or computer-readable storage medium) 908 in the form of a non-volatile or volatile memory, e.g., an Electrically Erasable Programmable Read-Only Memory (EEPROM) , a flash memory and a hard drive. The computer program product 908 comprises a computer program 910, which comprises code/computer readable instructions, which when executed by the processing unit 906 in the arrangement 900 cause the arrangement 900 and/or the UE in which it is comprised to perform the actions, e.g., of the procedure described earlier in conjunction with Fig. 5 or 6.
The computer program 910 may be configured as a computer program code structured in computer program modules 910A and 910B and optional 910C-910E.
Hence, in an exemplifying embodiment when the arrangement 900 is used in the UE 800, the code in the computer program of the arrangement 900 includes an obtaining module 910A, for obtaining one or more power control related parameters for each of one or more neighboring cells of a serving cell for the UE from the serving cell or the neighboring cell. The one or more neighboring cells are asynchronous with the serving cell. The code in the computer program 910 further includes an adapting module 910B, for adapting a D2D transmission power of the UE based on the obtained power control related parameters so as to reduce interference from the UE to cellular transmission of the one or more neighboring cells. The code in the computer program 910 further includes a measuring module 910C for, for each of the one or more neighboring cells, measuring a signal quality of the neighboring cell based on RS related information of the neighboring cell. The code in the computer program 910 further includes a calculating module 910D for, calculating a path loss between the UE and the neighboring cell based on the measured signal quality, and calculating a product of an acceptable interference threshold and the path loss for the neighboring cell. The code in the computer program 910 further includes an identifying module 910E for, identifying the one or
more neighboring cells which are asynchronous with the serving cell.
The computer program modules could essentially perform the actions of the flow illustrated in Fig. 5 or 6, to emulate the arrangement 801 in the UE 800. In other words, when the different computer program modules are executed in the processing unit 906, they may correspond, e.g., to the units 810 -850 of Fig. 8, respectively.
Although the code means in the embodiments disclosed above in conjunction with Fig. 9 are implemented as computer program modules which when executed in the processing unit causes the device to perform the actions described above in conjunction with the figures mentioned above, at least one of the code means may in alternative embodiments be implemented at least partly as hardware circuits.
The processor may be a single CPU (Central processing unit) , but could also comprise two or more processing units. For example, the processor may include general purpose microprocessors; instruction set processors and/or related chips sets and/or special purpose microprocessors such as Application Specific Integrated Circuit (ASICs) . The processor may also comprise board memory for caching purposes. The computer program may be carried by a computer program product connected to the processor. The computer program product may comprise a computer readable medium on which the computer program is stored. For example, the computer program product may be a flash memory, a Random-access memory (RAM) , a Read-Only Memory (ROM) , or an EEPROM, and the computer program modules described above could in alternative embodiments be distributed on different computer program products in the form of memories within the UE.
Although the present technology has been described above with reference to specific embodiments, it is not intended to be limited to the specific form set forth herein. For example, the embodiments presented herein are not limited to LTE;
rather they are equally applicable to other appropriate cellular systems such as High-Speed Packet Access (HSPA) or 5G Radio Access Technology (RAT) later. The technology is limited only by the accompanying claims and other embodiments than the specific above are equally possible within the scope of the appended claims. As used herein, the terms “comprise/comprises” or “include/includes” do not exclude the presence of other elements or steps. Furthermore, although individual features may be included in different claims, these may possibly advantageously be combined, and the inclusion of different claims does not imply that a combination of features is not feasible and/or advantageous. In addition, singular references do not exclude a plurality. Finally, reference signs in the claims are provided merely as a clarifying example and should not be construed as limiting the scope of the claims in any way.
Claims (20)
- A power control method (500) performed by a User Equipment (UE) in a mixed cellular and Device-to-Device (D2D) network, comprising:obtaining (S510) one or more power control related parameters for each of one or more neighboring cells of a serving cell for the UE from the serving cell or the neighboring cell, the one or more neighboring cells being asynchronous with the serving cell; andadapting (S520) a D2D transmission power of the UE based on the obtained power control related parameters so as to reduce interference from the UE to cellular transmission of the one or more neighboring cells.
- The method according to claim 1, wherein for each of the one or more neighboring cells, the one or more power control related parameters include an acceptable interference threshold of the neighboring cell and Reference Signal (RS) related information of the neighboring cell.
- The method according to claim 2, further comprising:for each of the one or more neighboring cells,measuring (S620) a signal quality of the neighboring cell based on RS related information of the neighboring cell;calculating (S630) a path loss between the UE and the neighboring cell based on the measured signal quality; andcalculating (S640) a product of an acceptable interference threshold and the path loss for the neighboring cell,wherein, adapting (S520) the D2D transmission power of the UE comprises controlling (S650) the D2D transmission power of the UE to be smaller than the minimum one among all the respective products for the one or more neighboring cells.
- The method according to claim 3, wherein the signal quality is indicated by Reference Signal Receiving Power (RSRP) , Reference Signal Receiving Quality (RSRQ) or Channel Quality Indicator (CQI) of the RS.
- The method according to any of claims 1 to 4, wherein the one or more power control related parameters for each of the one or more neighboring cells are obtained from the serving cell via system broadcast information or Radio Resource Control (RRC) signaling, or from the neighboring cell via system broadcast information.
- The method according to any of claims 1 to 5, further comprising:identifying (S530) the one or more neighboring cells which are asynchronous with the serving cell.
- The method according to claim 6, wherein identifying (S530) the one or more neighboring cells comprises:receiving a neighboring cell list from the serving cell; andfor each neighboring cell in the neighboring cell list:comparing a starting time of a frame between the neighboring cell and the serving cell; anddetermining whether the neighboring cell is asynchronous with the serving cell based on the comparison.
- The method according to claim 6, wherein identifying (S530) the one or more neighboring cells comprises:receiving from the serving cell an indication indicating the one or more neighboring cells.
- A UE (800) in a mixed cellular and Device-to-Device (D2D) network for power control, the UE comprising:an obtaining unit (810) configured to obtain one or more power control related parameters for each of one or more neighboring cells of a serving cell for the UE from the serving cell or the neighboring cell, the one or more neighboring cells being asynchronous with the serving cell; andan adapting unit (820) configured to adapt a D2D transmission power of the UE based on the obtained power control related parameters so as to reduce interference from the UE to cellular transmission of the one or more neighboring cells.
- The UE according to claim 9, wherein for each of the one or more neighboring cells, the one or more power control related parameters include an acceptable interference threshold of the neighboring cell and Reference Signal (RS) related information of the neighboring cell.
- The UE according to claim 10, further comprising:a measuring unit (830) configured to, for each of the one or more neighboring cells, measure a signal quality of the neighboring cell based on RS related information of the neighboring cell; anda calculating unit (840) configured to calculate a path loss between the UE and the neighboring cell based on the measured signal quality, and configured to calculate a product of an acceptable interference threshold and the path loss for the neighboring cell,wherein, the adapting unit (820) is further configured to control the D2D transmission power of the UE to be smaller than the minimum one among all the respective products for the one or more neighboring cells.
- The UE according to claim 11, wherein the signal quality is indicated by Reference Signal Receiving Power (RSRP) , Reference Signal Receiving Quality (RSRQ) or Channel Quality Indicator (CQI) of the RS.
- The UE according to any of claims 9 to 12, wherein the obtaining unit (810) is configured to obtain the one or more power control related parameters for each of the one or more neighboring cells from the serving cell via system broadcast information or Radio Resource Control (RRC) signaling, or from the neighboring cell via system broadcast information.
- The UE according to any of claims 9 to 13, further comprising:an identifying unit (850) configured to identify the one or more neighboring cells which are asynchronous with the serving cell.
- The UE according to claim 14, wherein the identifying unit (850) is further configured to:receive a neighboring cell list from the serving cell; andfor each neighboring cell in the neighboring cell list:compare starting time of a frame between the neighboring cell and the serving cell; anddetermine whether the neighboring cell is asynchronous with the serving cell based on the comparison.
- The UE according to claim 14, wherein the identifying unit (850) is further configured to:receive from the serving cell an indication indicating the one or more neighboring cells.
- A UE (800) in a mixed cellular and device-to-device (D2D) network for power control, the UE comprising:a processor (801) , anda memory (803) including instructions which, when executed by said processor, cause said UE to:obtain one or more power control related parameters for each of one or more neighboring cells of a serving cell for the UE from the serving cell or the neighboring cell, the one or more neighboring cells being asynchronous with the serving cell; andadapt a D2D transmission power of the UE based on the obtained power control related parameters so as to reduce interference from the UE to cellular transmission of the one or more neighboring cells.
- The UE according to claim 17, wherein for each of the one or more neighboring cells, the one or more power control related parameters include an acceptable interference threshold of the neighboring cell and Reference Signal (RS) related information of the neighboring cell.
- The UE according to claim 18, wherein the instructions further cause said UE (800) to:for each of the one or more neighboring cells,measure a signal quality of the neighboring cell based on RS related information of the neighboring cell;calculate a path loss between the UE and the neighboring cell based on the measured signal quality; andcalculate a product of an acceptable interference threshold and the path loss for the neighboring cell,wherein, adapting the D2D transmission power of the UE comprises controlling the D2D transmission power of the UE to be smaller than the minimum one among all the respective products for the one or more neighboring cells.
- A computer program product (908) storing instructions (910) that when executed, cause one or more computing devices to perform the method of any of claims 1-8.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/413,003 US9763201B2 (en) | 2014-01-28 | 2014-12-04 | Power control method in mixed cellular and D2D network and UE |
EP14880880.1A EP3100527A4 (en) | 2014-01-28 | 2014-12-04 | Power control method in mixed cellular and d2d network and ue |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNPCT/CN2014/071670 | 2014-01-28 | ||
CN2014071670 | 2014-01-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015113444A1 true WO2015113444A1 (en) | 2015-08-06 |
Family
ID=53756220
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2014/093022 WO2015113444A1 (en) | 2014-01-28 | 2014-12-04 | Power control method in mixed cellular and d2d network and ue |
Country Status (3)
Country | Link |
---|---|
US (1) | US9763201B2 (en) |
EP (1) | EP3100527A4 (en) |
WO (1) | WO2015113444A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108605198A (en) * | 2016-05-13 | 2018-09-28 | 索尼公司 | Electronic device, information processing equipment and information processing method |
CN113423090B (en) * | 2016-05-13 | 2024-05-10 | 索尼公司 | Electronic device, information processing apparatus and method, and computer-readable storage medium |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10652834B2 (en) * | 2015-06-30 | 2020-05-12 | Apple Inc. | Distributed link scheduling technique for device to device communication |
US11800382B1 (en) | 2021-09-08 | 2023-10-24 | T-Mobile Usa, Inc. | Coverage improvement for 5G new radio wireless communication network |
US11606732B1 (en) | 2021-09-08 | 2023-03-14 | T-Mobile Usa, Inc. | Coverage improvement for 5G new radio wireless communication network, such as for over-shooting cells |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102088736A (en) * | 2011-01-14 | 2011-06-08 | 北京邮电大学 | User position list-based method for selectively multiplexing multiple honeycomb user resources for device to device (D2D) user pairs |
US20120250531A1 (en) | 2011-03-28 | 2012-10-04 | Qualcomm Incorporated | Methods and apparatus for relaying peer discovery information in wwan |
CN103079262A (en) * | 2012-12-28 | 2013-05-01 | 浙江大学 | Mode selection and resource allocation method of device-to-device (D2D) users in cellular system |
CN103139889A (en) * | 2011-11-28 | 2013-06-05 | 华为技术有限公司 | Power control method, user equipment, base station and communication system of dimension to dimension (D2D) |
WO2013134950A1 (en) * | 2012-03-16 | 2013-09-19 | Nec (China) Co., Ltd. | Method and apparatus for performing d2d communication |
US20130310103A1 (en) | 2012-05-21 | 2013-11-21 | Qualcomm Incorporated | Methods and apparatus for providing transmit power control for devices engaged in d2d communications |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9072060B2 (en) * | 2008-06-03 | 2015-06-30 | Nokia Technologies Oy | Method, apparatus and computer program for power control to mitigate interference |
EP2340681B1 (en) * | 2008-09-25 | 2014-11-12 | Nokia Corporation | Synchronization for device-to-device communication |
EP2384598B1 (en) * | 2009-01-16 | 2018-05-23 | Nokia Technologies Oy | Apparatus and method ofscheduling resources for device-to-device communications |
US8588803B2 (en) * | 2010-06-18 | 2013-11-19 | Nokia Corporation | Method and apparatus for resource scheduling for network controlled D2D communications |
EP2601803B1 (en) * | 2010-08-04 | 2014-11-19 | Nokia Corporation | A resolution method and apparatus for simultaneous transmission and receiving contention in a device-to-device cellular reuse system |
US8989794B2 (en) * | 2011-06-20 | 2015-03-24 | Qualcomm Incorporated | Method and apparatus for unplanned deployment of base stations |
TWI489896B (en) * | 2011-11-01 | 2015-06-21 | Inst Information Industry | Mobile apparatus, base station, directcommunication system and power control method thereof |
WO2013137580A1 (en) * | 2012-03-12 | 2013-09-19 | 엘지전자 주식회사 | Method for transmitting and receiving control information and apparatus for same |
US9445422B2 (en) * | 2012-05-25 | 2016-09-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Interference management for D2D system |
US9247508B2 (en) * | 2012-09-28 | 2016-01-26 | Sharp Kabushiki Kaisha | Transmission power control for signals used by user equipment terminals for device-to-device services |
US9572171B2 (en) * | 2013-10-31 | 2017-02-14 | Intel IP Corporation | Systems, methods, and devices for efficient device-to-device channel contention |
-
2014
- 2014-12-04 WO PCT/CN2014/093022 patent/WO2015113444A1/en active Application Filing
- 2014-12-04 US US14/413,003 patent/US9763201B2/en active Active
- 2014-12-04 EP EP14880880.1A patent/EP3100527A4/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102088736A (en) * | 2011-01-14 | 2011-06-08 | 北京邮电大学 | User position list-based method for selectively multiplexing multiple honeycomb user resources for device to device (D2D) user pairs |
US20120250531A1 (en) | 2011-03-28 | 2012-10-04 | Qualcomm Incorporated | Methods and apparatus for relaying peer discovery information in wwan |
CN103139889A (en) * | 2011-11-28 | 2013-06-05 | 华为技术有限公司 | Power control method, user equipment, base station and communication system of dimension to dimension (D2D) |
WO2013134950A1 (en) * | 2012-03-16 | 2013-09-19 | Nec (China) Co., Ltd. | Method and apparatus for performing d2d communication |
US20130310103A1 (en) | 2012-05-21 | 2013-11-21 | Qualcomm Incorporated | Methods and apparatus for providing transmit power control for devices engaged in d2d communications |
CN103079262A (en) * | 2012-12-28 | 2013-05-01 | 浙江大学 | Mode selection and resource allocation method of device-to-device (D2D) users in cellular system |
Non-Patent Citations (1)
Title |
---|
See also references of EP3100527A4 |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108605198A (en) * | 2016-05-13 | 2018-09-28 | 索尼公司 | Electronic device, information processing equipment and information processing method |
KR20190007407A (en) * | 2016-05-13 | 2019-01-22 | 소니 주식회사 | Electronic device, information processing device and information processing method |
EP3457720A4 (en) * | 2016-05-13 | 2019-05-22 | Sony Corporation | Electronic apparatus, information processing device and information processing method |
US10721583B2 (en) | 2016-05-13 | 2020-07-21 | Sony Corporation | Electronic apparatus, device and method for adjusting a parameter for a proximity-based service communication |
US10917742B2 (en) | 2016-05-13 | 2021-02-09 | Sony Corporation | Electronic apparatus, device and method for adjusting a parameter for a proximity-based service communication |
CN108605198B (en) * | 2016-05-13 | 2021-08-31 | 索尼公司 | Electronic device, information processing apparatus, and information processing method |
CN113423090A (en) * | 2016-05-13 | 2021-09-21 | 索尼公司 | Electronic device, information processing apparatus, and information processing method |
KR102328300B1 (en) * | 2016-05-13 | 2021-11-19 | 소니그룹주식회사 | Electronic apparatus, information processing device and information processing method |
AU2017262128B2 (en) * | 2016-05-13 | 2022-04-14 | Sony Corporation | Electronic apparatus, information processing device and information processing method |
CN113423090B (en) * | 2016-05-13 | 2024-05-10 | 索尼公司 | Electronic device, information processing apparatus and method, and computer-readable storage medium |
Also Published As
Publication number | Publication date |
---|---|
US9763201B2 (en) | 2017-09-12 |
EP3100527A1 (en) | 2016-12-07 |
US20160278022A1 (en) | 2016-09-22 |
EP3100527A4 (en) | 2017-08-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10736054B2 (en) | Random access power control method and apparatus and communication system | |
US10638440B2 (en) | Method for determining measurement gap length and network device | |
US11736330B2 (en) | Indication of subcarrier spacing numerology | |
US8909216B2 (en) | Inter-cell device discovery in device-to-device communication | |
EP3614737A1 (en) | Measurement method, measurement configuration method, and related device | |
EP2988551B1 (en) | Signal transmission method and device | |
WO2020155936A1 (en) | Dual/multi-connectivity-based secondary node addition/replacement method and device | |
EP3504893B1 (en) | Identification of potentially neighboring network nodes in a wireless communication network | |
US11540157B2 (en) | Method and apparatus for updating neighboring base station relations | |
BR112021002576A2 (en) | network node, first network node and wireless device to handle a wireless device link switch and related methods | |
US11297652B2 (en) | Wireless device, network node and methods performed thereby for handling access to a cell | |
US11589331B2 (en) | Interface establishing method and apparatus | |
US20220394519A1 (en) | Systems and methods for validating parameters | |
WO2015113444A1 (en) | Power control method in mixed cellular and d2d network and ue | |
US20210392607A1 (en) | First wireless device, first network node, second wireless device, and methods performed thereby, for determining a status of a cell | |
US11452013B2 (en) | Radio network node, wireless device and methods performed therein | |
US11968571B2 (en) | Target node, user equipment, source node and methods performed thereby for handling reconfigurations of the user equipment during a conditional handover | |
US11452029B2 (en) | Broadcast of features required for UE accessing a cell | |
WO2020199060A1 (en) | Network access method and related device | |
US20220167169A1 (en) | Methods, UE and Nodes for Handling System Information Protection | |
US9918256B2 (en) | User equipment, base station and method for handover | |
US20110189989A1 (en) | Method and Apparatus for Cross Mode Mobility Optimization | |
US11363661B2 (en) | Methods and arrangements for assisting recovery of call setup failure in a wireless communication system | |
US20240137260A1 (en) | Indication of Subcarrier Spacing Numerology | |
JP2022530912A (en) | Relaxed inter-frequency measurement |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 14413003 Country of ref document: US |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14880880 Country of ref document: EP Kind code of ref document: A1 |
|
DPE1 | Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101) | ||
REEP | Request for entry into the european phase |
Ref document number: 2014880880 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2014880880 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |