WO2015018004A1 - Amélioration de la robustesse d'une indication de configuration de liaison montante/descendante duplexée par répartition temporelle - Google Patents

Amélioration de la robustesse d'une indication de configuration de liaison montante/descendante duplexée par répartition temporelle Download PDF

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Publication number
WO2015018004A1
WO2015018004A1 PCT/CN2013/080994 CN2013080994W WO2015018004A1 WO 2015018004 A1 WO2015018004 A1 WO 2015018004A1 CN 2013080994 W CN2013080994 W CN 2013080994W WO 2015018004 A1 WO2015018004 A1 WO 2015018004A1
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Prior art keywords
life cycle
user equipment
time division
division duplex
control information
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Ceased
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PCT/CN2013/080994
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English (en)
Inventor
Haipeng Lei
Cassio Barboza Ribeiro
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Nokia China Investment Co Ltd
Nokia Inc
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Nokia China Investment Co Ltd
Nokia Inc
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Priority to PCT/CN2013/080994 priority Critical patent/WO2015018004A1/fr
Publication of WO2015018004A1 publication Critical patent/WO2015018004A1/fr
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1864—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex

Definitions

  • Various communication systems may benefit from enhancements to robustness of various indications.
  • third generation partnership project (3GPP) long term evolution-advanced (LTE-Advanced) technology release 12 (Rel-12) may benefit from enhancements of robustness of a time division duplex (TDD) uplink/downlink (UL/DL) configuration indication for LTE TDD enhancement for DL-UL Interference Management and Traffic Adaptation (TDD_eIMTA).
  • TDD time division duplex
  • UL/DL uplink/downlink
  • TDD_eIMTA DL-UL Interference Management and Traffic Adaptation
  • LTE TDD allows for asymmetric UL-DL allocations by providing seven different semi- statically configured TDD UL-DL configurations shown in Figure 1. These allocations can provide between 40% and 90% DL subframes.
  • the current mechanism for adapting UL-DL allocation is based on the system information change procedure with 640ms period.
  • the concrete TDD UL/DL configuration is semi- statically informed by SIB-1 signaling.
  • TDD_eIMTA is a feature for LTE Rel-12 or beyond, whose motivation is to realize the traffic adaptation to match the uplink and downlink traffic variation.
  • PDCCH physical downlink control channel
  • MAC medium access control
  • PHY physical layer
  • a new DCI with cyclic redundancy check (CRC) scrambled by a new radio network temporary identifier (RNTI) is defined and transmitted in common search space, for example, downlink control information (DCI) format 1C.
  • DCI downlink control information
  • RNTI new radio network temporary identifier
  • the average probability of a missed downlink scheduling grant is 1%.
  • eNB cannot know whether UE correctly decodes the TDD UL/DL configuration information since there is no HARQ feedback procedure for common LI signaling. Considering the importance of correctly receiving UL/DL configuration information, the reliability and robustness may need to be further enhanced.
  • a HARQ timing problem may exist.
  • the Rel-8 HARQ timing is not applicable since transmission direction of some subframes is dynamically changed.
  • TDD UL/DL configuration 1 if UE receives physical downlink shared channel (PDSCH) in DL subframe 9, it shall transmit corresponding A/N on physical uplink control channel (PUCCH) in UL subframe 3 in next radio frame according to currently specified LTE HARQ timing rules. If the current TDD UL/DL configuration is switched to TDD UL/DL configuration 2 to adapt to the traffic fluctuation, then subframe 3 in next radio frame will be DL subframe.
  • PDSCH physical downlink shared channel
  • PUCCH physical uplink control channel
  • FIG. 2 illustrates HARQ timing problem in case of dynamic TDD UL/DL reconfiguration.
  • UL/DL configuration 5 and 0 are used as DL and UL reference configuration, respectively. That is to say, if TDD elMTA is enabled, the DL HARQ timing can always be based on the 1:9 UL-DL subframe configuration and UL HARQ operation can always be based on the 6:4 UL-DL subframe configuration, regardless of the actual UL-DL subframe configuration in use in a frame or half a frame.
  • TDD UL/DL configuration indication in one radio frame is one way to enhance the reliability of explicit LI signaling.
  • this requires more signaling overhead in multiple subframes in each radio frame especially considering the resource limitation of common search space.
  • the reliability of this UE-common DCI has not been improved due to only 16 bits CRC for error checking.
  • HARQ timing for TDD elMTA one approach is to use the fixed or semi- statically configured reference configuration, with the drawbacks discussed above.
  • Another approach is to use dynamic reference configuration which has been specified in Rel- 11 TDD inter-band C A with different UL/DL configurations on different bands to solve HARQ timing problem.
  • TDD UL/DL configuration there may be potential misalignment of TDD UL/DL configuration between eNB and UE when the reconfiguration signaling is not received correctly (i.e. in case of false alarm or miss).
  • Another issue for this method is the higher implementation complexity to dynamically adjust HARQ timing on a frame basis. Therefore, the dynamically adjusted HARQ timing based on the latest configuration may not be appropriate for TDD UL/DL reconfiguration with time scale of 10 ms.
  • a method can include preparing a user equipment-common downlink control information for indicating a time division duplex uplink/downlink configuration in one fixed downlink subframe that is used to indicate the time division duplex uplink/downlink configuration to be used in the next frame. The method can also include transmitting the user equipment-common downlink control information in the fixed downlink subframe.
  • a method can include receiving a user equipment-common downlink control information for indicating time division duplex uplink/downlink configuration in one fixed downlink subframe which is used to indicate the time division duplex uplink/downlink configuration to be used in the next frame.
  • the method can also include validating the user equipment-common downlink control information with a 16-bit cyclic redundancy check scrambled by a predefined radio network temporary identifier.
  • An apparatus can include at least one processor and at least one memory including computer program code.
  • the at least one memory and the computer program code can be configured to, with the at least one processor, cause the apparatus at least to prepare a user equipment-common downlink control information for indicating a time division duplex uplink/downlink configuration in one fixed downlink subframe that is used to indicate the time division duplex uplink/downlink configuration to be used in the next frame.
  • the at least one memory and the computer program code can also be configured to, with the at least one processor, cause the apparatus at least to transmit the user equipment-common downlink control information in the fixed downlink subframe.
  • An apparatus in certain embodiments, can include at least one processor and at least one memory including computer program code.
  • the at least one memory and the computer program code can be configured to, with the at least one processor, cause the apparatus at least to receive a user equipment-common downlink control information for indicating time division duplex uplink/downlink configuration in one fixed downlink subframe which is used to indicate the time division duplex uplink/downlink configuration to be used in the next frame.
  • the at least one memory and the computer program code can also be configured to, with the at least one processor, cause the apparatus at least to validate the user equipment-common downlink control information with a 16-bit cyclic redundancy check scrambled by a predefined radio network temporary identifier.
  • an apparatus can include means for preparing a user equipment-common downlink control information for indicating a time division duplex uplink/downlink configuration in one fixed downlink subframe that is used to indicate the time division duplex uplink/downlink configuration to be used in the next frame.
  • the apparatus can also include means for transmitting the user equipment-common downlink control information in the fixed downlink subframe.
  • an apparatus can include means for receiving a user equipment-common downlink control information for indicating time division duplex uplink/downlink configuration in one fixed downlink subframe which is used to indicate the time division duplex uplink/downlink configuration to be used in the next frame.
  • the apparatus can also include means for validating the user equipment-common downlink control information with a 16-bit cyclic redundancy check scrambled by a predefined radio network temporary identifier.
  • a method can include configuring a time scale of time division duplex uplink/downlink configuration repetition in high layer signaling.
  • the method can also include repeating the time division duplex uplink/downlink configuration according to the high layer signaling.
  • An apparatus in certain embodiments, can include at least one processor and at least one memory including computer program code.
  • the at least one memory and the computer program code can be configured to, with the at least one processor, cause the apparatus at least to configure a time scale of time division duplex uplink/downlink configuration repetition in high layer signaling.
  • the at least one memory and the computer program code can also be configured to, with the at least one processor, cause the apparatus at least to repeat the time division duplex uplink/downlink configuration according to the high layer signaling.
  • an apparatus can include means for configuring a time scale of time division duplex uplink/downlink configuration repetition in high layer signaling.
  • the apparatus can also include means for repeating the time division duplex uplink/downlink configuration according to the high layer signaling.
  • a non-transitory computer-readable medium can be encoded with instructions that, when executed in hardware perform a process.
  • the process can include preparing a user equipment-common downlink control information for indicating a time division duplex uplink/downlink configuration in one fixed downlink subframe that is used to indicate the time division duplex uplink/downlink configuration to be used in the next frame.
  • the process can also include transmitting the user equipment-common downlink control information in the fixed downlink subframe.
  • a non-transitory computer-readable medium can, according to certain embodiments, be encoded with instructions that, when executed in hardware perform a process.
  • the process can include receiving a user equipment-common downlink control information for indicating time division duplex uplink/downlink configuration in one fixed downlink subframe which is used to indicate the time division duplex uplink/downlink configuration to be used in the next frame.
  • the process can also include validating the user equipment-common downlink control information with a 16-bit cyclic redundancy check scrambled by a predefined radio network temporary identifier.
  • a non-transitory computer-readable medium can, in certain embodiments, be encoded with instructions that, when executed in hardware perform a process.
  • the process can include configuring a time scale of time division duplex uplink/downlink configuration repetition in high layer signaling.
  • the process can also include repeating the time division duplex uplink/downlink configuration according to the high layer signaling.
  • a computer program product can encode instructions for performing a process.
  • the process can include preparing a user equipment-common downlink control information for indicating a time division duplex uplink/downlink configuration in one fixed downlink subframe that is used to indicate the time division duplex uplink/downlink configuration to be used in the next frame.
  • the process can also include transmitting the user equipment-common downlink control information in the fixed downlink subframe.
  • a computer program product can encode instructions for performing a process.
  • the process can include receiving a user equipment-common downlink control information for indicating time division duplex uplink/downlink configuration in one fixed downlink subframe which is used to indicate the time division duplex uplink/downlink configuration to be used in the next frame.
  • the process can also include validating the user equipment-common downlink control information with a 16-bit cyclic redundancy check scrambled by a predefined radio network temporary identifier.
  • a computer program product can, according to certain embodiments, encode instructions for performing a process.
  • the process can include configuring a time scale of time division duplex uplink/downlink configuration repetition in high layer signaling.
  • the process can also include repeating the time division duplex uplink/downlink configuration according to the high layer signaling.
  • Figure 1 illustrates current seven kinds of a time division duplex uplink/downlink configurations.
  • Figure 2 illustrates a hybrid automatic repeat request timing problem in case of dynamic time division duplex uplink/downlink reconfiguration.
  • Figure 3 illustrates a method according to certain embodiments.
  • Figure 4 illustrates another method according to certain embodiments.
  • Figure 5 illustrates a system according to certain embodiments.
  • Certain embodiments focus on enhancing the robustness and reliability of UL/DL configuration transmitted in common search space for TDD elMTA. Additionally, certain embodiments address optimization for HARQ-ACK feedback for DL and UL transmission. Moreover, at least one HARQ timing problem can be solved using certain embodiments.
  • UE-common DCI for indicating TDD UL/DL configuration can be transmitted in one fixed downlink subframe which is used to indicate the TDD UL/DL configuration to be used in the next frame.
  • a life cycle indication can be contained in the UE-common DCI for indicating TDD UL/DL configuration.
  • the LCI can be used to indicate the number of the following consecutive frames the indicated UL/DL configuration is to be used in, and this value can be updated by minus 1 in each following frame, for example, the value can be decremented each frame.
  • the same TDD UL/DL configuration indication can be repeated in the following consecutive frames indicated by LCI value. So the DL HARQ timing, UL HARQ timing and PUSCH timing can follow the practical UL/DL configuration due to no UL/DL configuration being changed in the following consecutive frames.
  • LCI value minus 1 When LCI value minus 1 is equal to 0, it can be updated in next frame according to the UL and DL traffic amount and/or ratio with the limitation of no larger than the maximum value represented by LCI.
  • an LCI value when set to 1, it can mean the indicated UL/DL configuration will be used in the following frame and a different UL/DL configuration may be used in the frame after the next. Then the predefined or semi- statically configured DL/UL reference configuration can be used to guarantee that the HARQ timing can work properly if the UL/DL configuration in the frame after the next is really changed to another different one compared with its previous frame. Otherwise, the DL HARQ timing, UL HARQ timing and PUSCH timing can still follow the practical UL/DL configuration due to no UL/DL configuration changed in the consecutive frames.
  • the eNB can detect UL ACK/NACK or PUSCH according to the predefined or semi- statically configured DL/UL reference configuration in case that the TDD
  • the eNB can try to detect UL ACK/ ACK or PUSCH according to the predefined or semi- statically configured DL/UL reference configuration after it does not detect that according to the practical TDD UL/DL configuration in case the TDD UL/DL configuration is not changed.
  • the UE Upon receiving this common DCI, the UE can first validate it with a 16-bit CRC scrambled by the predefined RNTL Then the UE can validate whether the LCI value received in this frame is equal to that in previous frame minus 1, if the LCI value in previous frame is larger than 1. Thus, the UE can detect the indicated TDD UL/DL configuration with very high reliability.
  • UE misses the common DCI in current frame and the current frame is included in the life cycle of previous TDD UL/DL configuration for example, when the LCI value in the previous frame is larger than 1
  • the UE misses the common DCI in current frame and the current frame is not included in the life cycle of previous TDD UL/DL configuration for example, LCI value in previous frame is equal to 1
  • one bit can be contained for even or odd checking aligned with whether a current system frame number (SFN) is even or odd.
  • SFN system frame number
  • the time scale can be configured and signaled by high layer. So the TDD UL/DL configuration can be indicated in the first frame and always repeated in the following frames within one reconfiguration period. In this way, HARQ timing can always follow the practical TDD UL/DL configuration within same reconfiguration period. During the boundary from one reconfiguration period to the next, the UE can follow the predefined or semi- statically configured DL/UL reference configuration in order to guarantee the HARQ timing works properly. [0045] In certain embodiments, the approach can improve the reliability and robustness of TDD UL/DL configuration indication for TDD elMTA. Meanwhile, HARQ timing problem can be optimized.
  • CCIM downlink power reduction or uplink power boosting in conflicting subframes.
  • coordination among neighboring cells may be needed to determine the most appropriate TDD UL/DL configuration for all the small cells within one cluster according to the traffic fluctuation in UL and DL for the whole cluster.
  • TDD elMTA cannot dynamically change the TDD UL/DL configuration every tens of ms delay.
  • the selected UL/DL configuration may be used in the several following consecutive frames. Assuming the backhaul delay is 40ms, at least once a UL/DL configuration is selected, it may need to be kept unchanged in the following four frames. It is also true for DL power reduction and UL power boosting in conflicting subframes due to the backhaul delay when TDD UL/DL configurations of neighboring cells are exchanged.
  • TDD elMTA may mainly be adopted in small cells like Pico or Femto with dynamic or bursty traffic in downlink or uplink. Especially in case of large data file downloading or uploading, the UL/DL traffic ratio may be kept unchanged or may remain similar, and thus may not necessarily be changed to another one. Third, even with a fast reconfiguration rate of 10ms, the period of system staying in one
  • UL/DL configuration may be much longer than a frame period.
  • 40ms time scale may have quite a similar performance to a 10ms time scale.
  • one TDD UL/DL configuration can be kept unchanged for several following frames.
  • a life cycle indication can be contained in the UE-common DCI for indicating TDD UL/DL configuration.
  • LCI can be used to indicate the number of the following consecutive frames the indicated UL/DL configuration to be used in and can be updated by minus 1 in each following frame.
  • the LCI value can dependent on the number of bits for LCI indication. For example, assuming two bits are used for LCI indication, the maximum value and minimum value of LCI may be 4 and 1 , respectively. If one TDD UL/DL configuration will be used for the following four frames, then two-bit LCI shall be indicated to "11" in current frame and "10" in next frame, and so on till "00" in the fourth frame.
  • Table 1 A detailed mapping relationship between LCI bit and LCI value is shown in Table 1.
  • LCI value minus 1 is equal to 0, for example, two-bit LCI in DCI is (0, 0), it shall be updated in next frame according to the UL and DL traffic amount and ratio with the limitation of no larger than the maximum value represented by LCI.
  • Table 1 mapping relationship between LCI bit and LCI value
  • mappings are possible, such as one in which (0, 0) corresponds to 4, (0, 1) corresponds to 3, and so forth.
  • the same TDD UL/DL configuration indication can be repeated in the following consecutive frames indicated by LCI value.
  • the DL HARQ timing, UL HARQ timing and PUSCH timing can follow the practical UL/DL configuration due to no UL/DL configuration changed in the following consecutive frames.
  • the predefined or semi- statically configured DL/UL reference configuration can be used to guarantee the HARQ timing works properly.
  • LCI When LCI is set to 1 it can mean that the indicated UL/DL configuration will be used in the following frame and a different UL/DL configuration may be used in the frame after the next. If the UL/DL configuration in the frame after the next is really changed to another different one compared with its previous frame then, at the UE side, the UE can follow the predefined or semi- statically configured DL/UL reference configuration. At the eNB side, the eNB can detect UL ACK/NACK or PUSCH according to the predefined or semi- statically configured DL/UL reference configuration.
  • the UE can follow the practical UL/DL configuration.
  • the eNB can try to detect UL ACK/NACK or PUSCH according to the predefined or semi- statically configured DL/UL reference configuration after it does not detect that according to the practical TDD UL/DL configuration.
  • UE Upon receiving this common DCI indicating TDD UL/DL configuration, UE shall first validate it with 16-bit CRC scrambled by the predefined RNTI then validate whether the LCI received in this frame is equal to that in previous frame minus 1 if the LCI value in the previous frame is larger than 1. Then the UE can detect the indicated TDD UL/DL configuration with very high reliability.
  • LCI value in previous frame is larger than
  • LCI indications can also be 1 , 3, or other values which are also included in certain embodiments. Although the details of such embodiments are not explicitly provided, they may be inferred from the embodiment in which the LCI indications are 4.
  • the UE can validate this bit field with a current SFN number. In this way, error-checking capability can be further enhanced.
  • the UE can follow the predefined or semi- statically configured DL/UL reference configuration in order to guarantee the HARQ timing works properly. In that sense, DL or UL performance loss can be further avoided due to ACK/NACK bundling.
  • this UE-common DCI is transmitted in one fixed downlink subframe, for example, in the second half-frame. So the indicated TDD UL/DL configuration is to be used in next frame. A benefit of transmitting UE-common DCI in downlink subframe 5 or
  • certain embodiments may have various benefits and advantages. For example, certain embodiments may further enhance the robustness and reliability of UE-common DCI for TDD UL/DL configuration indication. Moreover, certain embodiments may solve a HARQ timing problem by indicating TDD reconfiguration set. Furthermore, certain embodiments may avoid necessary UE power consumption for blind detection.
  • Figure 3 illustrates a method according to certain embodiments.
  • a method can include, at 310, preparing a user equipment-common downlink control information for indicating a time division duplex uplink/downlink configuration in one fixed downlink subframe of, for example, a second half-frame that is used to indicate the time division duplex uplink/downlink configuration to be used in the next frame.
  • the method can also include, at 320, transmitting the user equipment-common downlink control information in the fixed downlink subframe.
  • the preparing can involve, at 312, including, in the user equipment-common downlink control information, a life cycle indication.
  • the life cycle indication can be configured to indicate a number of following consecutive frames in which the indicated time division duplex uplink/downlink configuration is to be used.
  • the preparing can also involve including, in the user equipment-common downlink control information, one bit for even or odd checking aligned with whether a current system frame number is even or odd.
  • the method can also include, at 330, decrementing the life cycle indication in each following frame until the life cycle indication reaches a predetermined minimum value.
  • the method can further include, at 340, repeating a time division duplex uplink/downlink configuration indication in the following consecutive frames indicated by the life cycle indication value.
  • the method can further include, at 350, updating the life cycle indication in a next frame after the life cycle indication value is one, wherein the updating is based on uplink and downlink traffic amount and/or ratio with a limitation of no larger than a maximum value represented by the life cycle indication.
  • the method of Figure 3 may be performed by, for example, a base station such as an evolved Node B. Other devices are permitted to perform the method.
  • Figure 4 illustrates another method according to certain embodiments.
  • a method can include, at 410, receiving a user equipment-common downlink control information for indicating time division duplex uplink/downlink configuration in one fixed downlink subframe of, for example, the second half-frame which is used to indicate the time division duplex uplink/downlink configuration to be used in the next frame.
  • the method can also include, at 420, validating the user equipment-common downlink control information with a 16-bit cyclic redundancy check scrambled by a predefined radio network temporary identifier.
  • the method can further include, at 440, validating whether a life cycle indication value received in this frame is equal to that in previous frame minus the number of frames in between the latest received life cycle indication value and the current frame if the life cycle indication value in the previous frame is larger than one. For example, if the UE receives in one frame a LCI with a certain count, and misses the next one, it can still compare the latest received
  • the verification is not limited to a UE that received an LCI in two consecutive frames.
  • the method can include, when the user equipment misses the user equipment-common downlink control information in a current frame and the current frame is included in the life cycle of a previous time division duplex uplink/downlink configuration, using a same time division duplex uplink/downlink configuration as that in a previous frame.
  • the method can include, at 460, when the user equipment misses the user equipment-common downlink control information in the current frame and the current frame is not included in the life cycle of the previous time division duplex uplink/downlink configuration, using a predefined or semi- statically configured time division duplex uplink/downlink configuration as uplink/downlink reference configuration.
  • Figure 5 illustrates a system according to certain embodiments of the invention.
  • a system may include multiple devices, such as, for example, at least one UE 510, at least one eNB 520 or other base station or access point, and at least one core network element 530.
  • UE 510 and eNB 520 may be present, and in other systems UE 510, eNB 520, and a plurality of other user equipment may be present.
  • Other configurations are also possible.
  • Each of these devices may include at least one processor, respectively indicated as 514, 524, and 534.
  • At least one memory can be provided in each device, and indicated as 515, 525, and 535, respectively.
  • the memory may include computer program instructions or computer code contained therein.
  • the processors 514, 524, and 534 and memories 515, 525, and 535, or a subset thereof, can be configured to provide means corresponding to the various blocks of each of Figures 3 and 4.
  • transceivers 516, 526, and 536 can be provided, and each device may also include at least one antenna, respectively illustrated as 517, 527, and 537.
  • antenna 537 may be provided.
  • core network element 530 may be configured for wired communication, rather than wireless communication, and in such a case antenna 537 would illustrate any form of communication hardware, without requiring a conventional antenna.
  • Transceivers 516, 526, and 536 can each, independently, be a transmitter, a receiver, or both a transmitter and a receiver, or a unit or device that is configured both for transmission and reception.
  • Processors 514, 524, and 534 can be embodied by any computational or data processing device, such as a central processing unit (CPU), application specific integrated circuit (ASIC), or comparable device.
  • the processors can be implemented as a single controller, or a plurality of controllers or processors.
  • Memories 515, 525, and 535 can independently be any suitable storage device, such as a non-transitory computer-readable medium.
  • a hard disk drive (HDD), random access memory (RAM), flash memory, or other suitable memory can be used.
  • the memories can be combined on a single integrated circuit as the processor, or may be separate from the one or more processors.
  • the computer program instructions stored in the memory and which may be processed by the processors can be any suitable form of computer program code, for example, a compiled or interpreted computer program written in any suitable programming language.
  • the memory and the computer program instructions can be configured, with the processor for the particular device, to cause a hardware apparatus such as UE 510, eNB 520, and core network element 530, to perform any of the processes described above (see, for example, Figures 3 and 4). Therefore, in certain embodiments, a non-transitory computer-readable medium can be encoded with computer instructions that, when executed in hardware, perform a process such as one of the processes described herein. Alternatively, certain embodiments of the invention can be performed entirely in hardware.
  • Figure 5 illustrates a system including a UE, eNB, and core network element
  • embodiments of the invention may be applicable to other configurations, and configurations involving additional elements.
  • additional UEs may be present.

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Abstract

Divers systèmes de communication peuvent bénéficier d'améliorations de la robustesse de diverses indications. A titre d'exemple, la technologie évoluée LTE 3GPP, version 12, peut bénéficier d'améliorations de la robustesse d'une indication de configuration UL/DL TDD pour l'amélioration TDD LTE destinée à la Gestion du Brouillage DL-UL et à l'Adaptation du Trafic (TDD_eIMTA, Time Division Duplex enhanced Interference Management and Traffic Adaptation). Un problème de cadencement HARQ peut en outre également être résolu conformément à certains modes de réalisation.
PCT/CN2013/080994 2013-08-07 2013-08-07 Amélioration de la robustesse d'une indication de configuration de liaison montante/descendante duplexée par répartition temporelle Ceased WO2015018004A1 (fr)

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CN109792693A (zh) * 2016-09-22 2019-05-21 Lg电子株式会社 减少上行链路信号与下行链路信号之间的干扰的方法和用于该方法的装置
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CN110050429B (zh) * 2016-09-29 2022-04-22 夏普株式会社 用于确定帧结构和关联定时的系统和方法

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