WO2015006905A1 - Changement flexible de la configuration de sous-trames de liaison descendante-liaison montante dans un système de communication sans fil - Google Patents

Changement flexible de la configuration de sous-trames de liaison descendante-liaison montante dans un système de communication sans fil Download PDF

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Publication number
WO2015006905A1
WO2015006905A1 PCT/CN2013/079392 CN2013079392W WO2015006905A1 WO 2015006905 A1 WO2015006905 A1 WO 2015006905A1 CN 2013079392 W CN2013079392 W CN 2013079392W WO 2015006905 A1 WO2015006905 A1 WO 2015006905A1
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WIPO (PCT)
Prior art keywords
radio
downlink
indication
uplink configuration
subframes
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PCT/CN2013/079392
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English (en)
Inventor
Wei Hong
Chunyan Gao
Jing HAN
Haiming Wang
Lili Zhang
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Broadcom Corporation
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Priority to PCT/CN2013/079392 priority Critical patent/WO2015006905A1/fr
Publication of WO2015006905A1 publication Critical patent/WO2015006905A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • 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
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK

Definitions

  • the exemplary and non-limiting embodiments of this invention relate generally to wireless communication systems, methods, devices and computer programs and, more specifically, relate to coordinating between a radio network and user equipments (UEs) dynamic or semi-dynamic (flexible) changes to the downlink/uplink configuration of subframes in a radio frame that are used to communicate user data between them.
  • UEs user equipments
  • the evolved UMTS Terrestrial Radio Access (E-UTRA, sometimes referred to as Long Term Evolution or LTE) system provides different options for the network to configure its radio frames in view of whether subframes of the radio frame are to be used for downlink (DL) or uplink (UL).
  • DL downlink
  • UL uplink
  • the special subframes can sometimes be used for downlink data.
  • Figure 1A summarizes the seven conventional TDD DL-UL configurations in the LTE system
  • Figure IB summarizes the nine conventional configurations of the special subframes that are designated as S in the configurations of Figure 1A.
  • the asymmetric nature of the UL/DL configurations allows the network to efficiently manage its radio spectrum to fit the current traffic conditions.
  • the different UL/DL allocations of subframes in a radio frame can provide between 40% and 90% DL subframes.
  • TDD time division duplex
  • DL-UL configuration in each cell is assumed, since otherwise there may be interference between DL and UL subframes at the cell edge (both eNB-to-eNB and UE-to-UE interference).
  • LA local area
  • TDD reconfiguration to adapt to the traffic had been expected to provide improved resource efficiency and provide power savings.
  • this TDD reconfiguration is to be dynamic (per frame) or semi-dynamic, the term of art among LTE researchers is known as flexible TDD reconfiguration.
  • a method for operating a radio device comprising:
  • the radio device is a network access node, sending downlink in a designated subframe of each of the non-consecutive periodic series of radio frames an indication of a downlink-uplink configuration of subframes to be used beginning in a predetermined subsequent radio frame;
  • an apparatus for operating a radio device comprises a processing system.
  • the processing system itself comprises at least one processor, and at least one memory including computer program code.
  • the processing system is configured to cause the apparatus to at least:
  • the radio device is a network access node
  • the radio device is a user equipment, check a designated subframe in each of the non-consecutive periodic series of radio frames for an indication of a downlink-uplink configuration of subframes to be used beginning in a predetermined subsequent radio frame.
  • a computer readable memory tangibly storing a set of computer readable instructions that are executable on a data processing system for operating a radio device.
  • the computer readable instructions comprise:
  • radio device is a network access node
  • the apparatus comprises processing means and communication means.
  • the processing means is for determining from an algorithm stored in a local memory of the radio device a non-consecutive periodic series of radio frames.
  • the communication means is for sending downlink in a designated subframe of each of the non-consecutive periodic series of radio frames an indication of a downlink-uplink configuration of subframes to be used beginning in a predetermined subsequent radio frame.
  • the communication means is for checking a designated subframe in each of the non-consecutive periodic series of radio frames for an indication of a downlink-uplink configuration of subframes to be used beginning in a predetermined subsequent radio frame.
  • processing means comprises at least one digital processor; and the radio means comprises at least one of a radio transmitter and a radio receiver, with or without a modem.
  • Figure 1A is a table showing the seven prior art TDD downlink-uplink subframe configurations in the LTE radio access system.
  • Figure IB is a prior art table showing the nine conventional configurations of the special subframes from Figure 1A, and is reproduced from Table 4.2-1 of 3GPP TS 36.211 VI 1.3.0 (2013-06).
  • Figure 2 is a conceptual schematic diagram illustrating an exemplary radio environment for DL-UL interference monitoring and traffic adaptation (elMTA) in which these teaching may be practiced.
  • elMTA DL-UL interference monitoring and traffic adaptation
  • Figure 3 A is a table showing a non-limiting example of how bits reserved for HARQ process number and DAI can be re-used for signaling a TDD configuration change according to one non-limiting example of these teachings.
  • Figure 3B is a table showing a non-limiting example of how bits reserved for only the HARQ process number can be re-used for signaling a TDD configuration change according to another non-limiting example of these teachings.
  • Figure 4 is a logic flow diagram illustrating the operation of a method, a result of execution of by apparatus, and execution of computer instructions comprising code embodied on a computer readable memory, for both a network access node and for a UE practicing certain exemplary embodiments of this invention.
  • Figure 5 is a simplified block diagram of a UE in communication with a macro cell and a local area cell, and illustrates exemplary electronic devices suitable for use in practicing the exemplary embodiments of this invention.
  • the indication of TDD UL/DL configuration change is in system information block 1 (SIBl).
  • SIBl system information block 1
  • the non-limiting examples below of these teachings provide a mechanism for less frequent changes to the TDD DL-UL configurations than if the network had the option to send such a configuration change in any subframe of any radio frame.
  • the DCI format 1 A scrambled with SI-RNTI that is used for SIB1 scheduling is periodically transmitted every 20ms
  • FIG. 2 is a conceptual schematic diagram illustrating an exemplary but non-limiting radio environment for elMTA in which these teaching may be practiced. While Figure 2 utilizes a pico eNB 24 as the network access node controlling the local area cell, the terms macro cell, local area (LA) cell, and pico eNB 24 are not limiting to the broader teachings herein. As will be shown at Figure 5, the UE in Figure 2 may have dual connections with the pico eNB 24 and with the macro eNB (22 at Figure 5) under which the pico eNB 24 operates. [0026] The whole sheet on which Figure 2 is shown may be considered as the relatively large geographic coverage area of a macro cell/macro eNB 22.
  • LA cell/LA eNB 24 having a relatively small coverage area as Figure 2 illustrates via the oval outline centered on the pico eNB 24.
  • These eNBs 22, 24 may operate on different first and second frequencies, or they may be on the same frequency and avoid interfering with one another via coordinating their transmissions and transmit powers. If on different frequencies, the macro eNB 22 and pico eNB 24 may be operating on first and second component carriers when the radio spectrum utilized by the radio network operator is parsed via carrier aggregation.
  • the macro eNB 22 and LA eNB 24 may be co-located, but in another deployment they are not co-located in which case the pico eNB 24 may be implemented as a remote radio head ( RH).
  • RH remote radio head
  • a rule that is understood among both the UEs 20 and the network access nodes 24 practicing this implementation of the invention (for example, the rule may be in published radio specifications) that sets forth exactly what subsequent radio frame any indicated change to the TDD DL-UL configuration is to take effect. Whether the configuration change takes effect in the next radio frame or some radio frame thereafter, the specific radio frame in which the change is to take effect is predetermined, and is subsequent to the radio frame carrying the configuration change indication.
  • the reserved bits such as those reserved for HARQ process number (4 bits, see Figure 3B) and Downlink Assignment Index (DAI, 2 bits, see Figure 3 A) and the most significant bit (MSB) of the transmit power control (TPC) command (1 bit) are reused to indicate the new TDD UL-DL configuration in one non-limiting embodiment.
  • the elMTA-enabled UE 20 After receiving this SI-RNTI scrambled DCI Format 1A for SIB 1 , the elMTA-enabled UE 20 will try to decode the reserved bits to get the new TDD UL-DL configuration used in the next changing period.
  • the remaining reserved bits in this implementation are used to identify the TDD DL-UL configuration that is to be used in the next radio frame.
  • the remaining bits may identify the current TDD DL-UL configuration which is to be continued in the next radio frame. Or the remaining bits may be null bits since the UE 20 can simply descramble and decode the one bit and, assuming that one bit indicates there is no TDD DL-UL configuration change, the UE 20 will know it does not need to descramble and decode the remaining reserved bits. If the TDD configuration changes, then UE 20 will know this from descrambling and decoding the one bit and then the UE will further decode the other reserved bits which identify the new TDD DL-UL configuration.
  • these reserved bits also serve that same dual purpose but they are only used to identify the TDD DL-UL configuration that is to be used in the next radio frame.
  • the UE will descramble and decode them all, read what that next-frame TDD DL-UL configuration is to be, and know from the current configuration whether or not this represents a change. Regardless of whether or not there is a change the UE will in this implementation always decode the reserved bits that identify the next-frame TDD configuration and follow the identified TDD UL/DL configuration.
  • the network access node may in an embodiment have the option to use or not use this flexible TDD DL-UL configuration in its cell, in which case it may include an indication in system information when this feature is enabled.
  • the elMTA-capable UE will assume that TDD DL-UL reconfiguration signaling is transmitted in the reserved bits in the PDCCH, scrambled with the SI-RNTI in subframe 5 and in the radio frames which satisfy the algorithm, and the elMTA-capable UE will monitor the corresponding PDCCH.
  • Another rule for the elMTA-capable UE 20 behavior is that when it correctly decodes the signaling bits mentioned above, it will assume the TDD configuration is enabled in the next radio frame (or whichever is the subsequent predetermined radio frame in which the indicated TDD DL-UL configuration is to take effect). If the elMTA-enabled UE 20 cannot correctly decode the reconfiguration signaling, then in a first non-limiting embodiment the elMTA-capable UE 20 will assume the TDD UL/DL configuration that is enabled in the next (or other predetermined subsequent) radio frame is the TDD UL/DL configuration that is conventionally indicated in SIB 1 itself.
  • the UE will continue using the current TDD UL/DL configuration (the end result is as if the UE assumes the bits it has failed to properly decode make no change to the current TDD DL-UL configuration).
  • the UE 20 gets a TDD DL-UL configuration from the SIB1 itself (which is conventional) and also gets a different TDD DL-UL configuration from the TDD configuration indication/identification bits in the PDCCH according to the above teachings (which the UE properly decodes).
  • the UE has two conflicting TDD DL-UL configurations and so in this embodiment there is a rule as to which one the UE will adopt for the next radio frame.
  • the rule is for the elMTA-enabled UE 20 to prioritize the TDD configuration that is configured by SI-RNTI scrambled DCI Format 1A for SIB1 that the UE receives in the PDCCH over the TDD-Config that it conventionally received from the SIB 1.
  • the rule is for the elMTA-enabled UE 20 to prioritize the TDD-Config that it conventionally received from the SIB1 over the TDD DL-UL configuration configured by SI-RNTI scrambled DCI Format 1A for SIB1 that the UE received in the PDCCH.
  • these reserved bits are used with reference to Figure 3A to indicate both the TDD configuration and the configuration of the special subframe (designated as S in Figure 1 A).
  • the value of the HARQ process number bits are given along the vertical axis at the left of Figure 3 A and the value of the DAI bits are along the horizontal axis at the top of Figure 3 A.
  • saO through sa6 correspond respectively to TDD DL-UL configurations 0 through 6 (see Figure 1A); and sspO through ssp8 correspond respectively to the nine possible special subframe configurations in conventional LTE (UC in Figure 3 A means unchanged).
  • the first of these four bits can be null and carry no meaning as in the Figure 3B example, or in another embodiment the first of these four bits can be used for the network to indicate whether or not there is a change, and the three least significant bits can be used to identify the new TDD DL-UL configuration.
  • Embodiments of these teachings provide the technical effect of efficiently informing UEs of the TDD configuration for the next period, and in the above examples the granularity of this reconfiguration is 20ms.
  • These teachings are quite simple to implement into the existing LTE system since little changes to the radio specifications would be required, and additionally the embodiments detailed above are backward compatible with legacy UEs and network access nodes.
  • Figure 4 presents a summary of the above teachings for operating a radio device, whether that device is a network access node such as the pico eNB 24 or the UE 20 shown at Figure 2.
  • Figure 4 begins at block 402 where the radio device determines, from an algorithm stored in its local memory, a non-consecutive periodic series of radio frames. These are the frames set aside for signaling the TDD configuration bits.
  • block 404N applies, where the network access node/pico eNB 24 sends downlink, in a designated subframe of each of the non-consecutive periodic series of radio frames, an indication of a downlink-uplink configuration of subframes to be used beginning in a predetermined subsequent radio frame.
  • This indicted DL-UL configuration will be used for the entire period from that predetermined subsequent radio frame until the next predetermined subsequent radio frame following the next radio frame in the non-consecutive periodic series.
  • the radio device is a UE then block 404U applies, where the UE checks a designated subframe in each of the non-consecutive periodic series of radio frames for an indication of a downlink-uplink configuration of subframes to be used beginning in a predetermined subsequent radio frame.
  • the designated subframe of the radio frame is the same in blocks 404N and 404U.
  • the algorithm comprises a modulo operation on system frame numbers (SFNs) of radio frames, and the non-consecutive periodic series of frames are those radio frames whose system frame number (SFN) corresponds to a single value output from the algorithm.
  • SFN mod 2 0; the designated subframe as subframe 5; and the predetermined subsequent radio frame as the next radio frame following the one in which the indication lies.
  • Block 408 summarizes different non-limiting options for when the indication mentioned at blocks 404N/404U is scrambled. Specifically for the case in which the radio device is the network access node, this node scrambles the indication with a SI-RNTI before sending the scrambled indication; and for the case in which the radio device is the UE it de-scrambles the indication with a SI-RNTI and determines from the de-scrambled indication at least whether or not the current DL-UL configuration of subframes is being changed beginning in the predetermined subsequent radio frame to a new downlink-uplink configuration.
  • the first bullet within block 408 (option 1) has the embodiment in which the indication is a single bit indicating whether or not a current DL-UL configuration of subframes is being changed to a new DL-UL configuration.
  • the network access node if it is executing the process of Figure 4 it sends with the indication an identifier of the new DL-UL configuration, wherein both the indication and the identifier are scrambled with the SI- NTI before being sent.
  • the UE de-scrambles the identifier of the new DL-UL configuration only after the UE determines from the de-scrambled indication that the current DL-UL configuration of subframes is being changed to a new DL-UL configuration.
  • the third bullet within block 408 has the embodiment in which the indication is a plurality of bits identifying the DL-UL configuration of subframes to be used beginning in the predetermined subsequent radio frame. This indicates whether or not the current DL-UL configuration of subframes is being changed when compared to an identifier of the current DL-UL configuration.
  • block 410 summarizes some of the signaling bits that in various ones of the above examples are re-purposed for the TDD DL-UL configuration signaling. Their new purpose is known from the fact these bits are in the designated subframe of the radio frame identified by the algorithm of block 402.
  • Block 410 specifies that the different purpose comprises at least one of: hybrid automatic repeat response (HARQ) process number; downlink assignment index (DAI); and transmission power control (TPC).
  • HARQ hybrid automatic repeat response
  • DAI downlink assignment index
  • TPC transmission power control
  • E-UTRA evolved UMTS Terrestrial Radio Access
  • DO Downlink Control Information
  • PDCH Physical Downlink Control Channel
  • the logic diagram of Figure 4 may be considered to each illustrate the operation of a method, and a result of execution of a computer program stored in a computer readable memory, and a specific manner in which components of an electronic radio device are configured to cause that electronic device to operate.
  • an electronic device for the case of the network access node of Figure 4 may be embodied as the entire LA/pico eNB 24, one or more components thereof such as a modem, chipset, or the like, or a combination of both the macro and LA cells/eNBs if they are co-located; and for the case of the UE 20 in Figure 4 such a device may be embodied as the whole UE or one or more components thereof such as a modem, chipset, or the like.
  • the various blocks shown in Figure 4 may also be considered as a plurality of coupled logic circuit elements constructed to carry out the associated function(s), or specific result of strings of computer program code or instructions stored in a memory.
  • Such blocks and the functions they represent are non-limiting examples, and may be practiced in various components such as integrated circuit chips and modules, and the exemplary embodiments of this invention may be realized in an apparatus that is embodied as an integrated circuit.
  • the integrated circuit, or circuits may comprise circuitry (as well as possibly firmware) for embodying at least one or more of a data processor or data processors, a digital signal processor or processors, baseband circuitry and radio frequency circuitry that are configurable so as to operate in accordance with the exemplary embodiments of this invention.
  • circuit/circuitry embodiments include any of the following: (a) hardware-only circuit implementations (such as implementations in only analog and/or digital circuitry) and (b) combinations of circuits and software (and/or firmware), such as: (i) a combination of processor(s) or (ii) portions of processor(s)/software (including digital signal processor(s)), software, and memory(ies) that work together to cause an apparatus, such as a network access node or a UE, to perform the various functions summarized at Figure 4 and (c) circuits, such as a microprocessor(s) or a portion of a microprocessor(s), that require software or firmware for operation, even if the software or firmware is not physically present.
  • circuitry would also cover an implementation of merely a processor (or multiple processors) or portion of a processor and its (or their) accompanying software and/or firmware.
  • circuitry also covers, for example, a baseband integrated circuit or an application specific integrated circuit (ASIC) or a similar integrated circuit for a server or network device/radio network access node or a UE which operates according to these teachings.
  • ASIC application specific integrated circuit
  • FIG. 5 shows two radio access network access nodes 22, 24.
  • the macro cell 22 is adapted for communication over a first wireless link 21 A with an apparatus, such as a mobile terminal or UE 20.
  • the macro access node 22 may be any access node such as an eNB or a NodeB (including frequency selective repeaters and remote radio heads) of any wireless network, such as E-UTRAN/LTE/LTE-Advanced, UTRAN, HSDPA, WCDMA, GSM, GERAN, and the like.
  • Figure 5 further shows a second radio access node implemented as a local area cell/pico eNB 24 and which is adapted for communication over a second wireless link 2 IB with the UE 20.
  • the UE 20 may not be in a connected state with the macro eNB 22 but may have its traffic handled exclusively for the moment by the pico eNB 22. There may also be a control interface 23 between these access nodes 22, 24 directly, which in E-UTRAN is implemented as an X2 interface over which the cells may coordinate or send time division duplex DL-UL configurations that are signaled to the UEs 20 according to these teachings so the eNBs 22, 24 can better manage and mitigate any potential interference.
  • the operator network of which the macro and LA cells 22, 24 are a part may also include a network control element or other higher network entity such as a radio network controller RNC in the case of a UTRAN and WCDMA/HSDPA network, or a mobility management entity MME for the case of LTE/LTE -Advanced networks in which case the MME may also serve as the serving gateway S-GW as shown at Figure 5.
  • This higher network entity 26 generally provides connectivity with the core cellular network and with further networks (e.g., a publicly switched telephone network PSTN and/or a data communications network/Internet).
  • the UE 20 includes processing means such as at least one data processor (DP) 20A, storing means such as at least one computer-readable memory (MEM) 20B storing at least one computer program (PROG) 20C, and communication means such as a transmitter TX1 20D and a receiver RX1 20E for bidirectional wireless communications with the macro cell 22 using the operative radio access technology.
  • the UE 20 may or may not have a second RF chain, shown for the UE 20 as a second TX2 20D' and a second RX2 20E' for bidirectional wireless communications with the LA cell 24 if these eNBs 22, 24 are operating with the same UE 20 on different frequencies. All of the relevant wireless communications are facilitated via one or more antennas 20F.
  • the macro cell/eNB 22 also includes processing means such as at least one data processor (DP) 22A, storing means such as at least one computer-readable memory (MEM) 22B storing at least one computer program (PROG) 22C, and communication means such as a transmitter TX 22D and a receiver RX 22E for bidirectional wireless communications with the UE 20 on the first link 21 A. All the wireless communications are via one or more antennas 22F, which for an eNB and many other base stations of other types of radio systems are typically implemented as an antenna array.
  • processing means such as at least one data processor (DP) 22A
  • MEM computer-readable memory
  • PROG computer program
  • the LA/pico eNB 24 is similar to the macro cell, and for the case in which they are co-located some of this hardware may be shared though functionally they operate as different network entities.
  • the LA/pico eNB 24 includes processing means such as at least one data processor (DP) 24A, storing means such as at least one computer-readable memory (MEM) 24B storing at least one computer program (PROG) 24C, and communication means such as a transmitter TX 24D and a receiver RX 24E for bidirectional wireless communications with the UE 20 on the second link 2 IB via one or more antennas 24F.
  • processing means such as at least one data processor (DP) 24A
  • MEM computer-readable memory
  • PROG computer program
  • communication means such as a transmitter TX 24D and a receiver RX 24E for bidirectional wireless communications with the UE 20 on the second link 2 IB via one or more antennas 24F.
  • the LA/pico eNB 24 stores at block 24G its own computer software code or algorithms to cause the LA/pico eNB 24 to operate as detailed above by identifying the relevant series of radio frames and for coding the re-used/reserved bits that it sends to the UE 20 in the designated subframe of those radio frames according the teachings detailed above by non-limiting example.
  • the macro eNB 22 may also have similar functionality as shown at 24G for the LA/pico eNB 22, but this is not particularly shown at Figure 5 only because the non-limiting examples above had the LA/pico eNB 24 practicing the invention on the network side.
  • a higher network entity 26 above the macro radio access node 22 In UTRAN (for example, HSDPA and WCDMA) this higher network entity 26 may be a radio network controller RNC, whereas in LTE/LTE- Advanced this entity 26 may be a MME and/or a S-GW as noted above.
  • UTRAN for example, HSDPA and WCDMA
  • this higher network entity 26 may be a radio network controller RNC
  • this entity 26 may be a MME and/or a S-GW as noted above.
  • the higher network entity 26 includes processing means such as at least one data processor (DP) 26A, storing means such as at least one computer-readable memory (MEM) 26B storing at least one computer program (PROG) 26C, and communication means such as a modem 26F for bidirectional communications with the macro eNB 22 and with other access nodes such as the LA/pico eNB 24 under its control or coordination over the data and control link 27.
  • processing means such as at least one data processor (DP) 26A
  • MEM computer-readable memory
  • PROG computer program
  • communication means such as a modem 26F for bidirectional communications with the macro eNB 22 and with other access nodes such as the LA/pico eNB 24 under its control or coordination over the data and control link 27.
  • those devices are also assumed to include as part of their wireless communicating means a modem and/or a chipset and/or an antenna chip which may or may not be inbuilt onto a radiofrequency (RF) front end module within those devices 20, 22, 24 and which also operates according to the teachings set forth above.
  • RF radiofrequency
  • At least one of the PROGs 22C, 24C in the local MEM 22B, 24B of each of the network access nodes 22, 24, as well as a PROG 20C in the local MEM 20B of the UE 20, is assumed to include a set of program instructions that, when executed by the associated DP 20A, 22A, 24A, enable the host radio device to operate in accordance with the exemplary embodiments of this invention, as detailed above.
  • the exemplary embodiments of this invention may be implemented at least in part by computer software stored on the MEM 20B, 22B, 24B which is executable by the DP 22A, 24A of the respective network access node 22, 24 and/or by the DP 20A of the UE 20; or by hardware, or by a combination of tangibly stored software and hardware (and tangibly stored firmware) in any one or more of these devices 20, 22, 24.
  • the respective DP with the MEM and stored PROG may be considered a data processing system.
  • Electronic devices implementing these aspects of the invention need not be the entire devices as depicted at Figure 5 or may be one or more components of same such as the above described tangibly stored software, hardware, firmware and DP, a system on a chip SOC, an application specific integrated circuit ASIC, a digital signal processor DSP, a modem, an antenna module, or a RF front end module as noted above.
  • the various embodiments of the UE 20 can include, but are not limited to personal portable digital assistance devices having wireless communication capabilities, including but not limited to cellular and other mobile phones (including smart phones), navigation devices, laptop/palmtop/tablet computers, digital cameras and music devices, Internet appliances, USB dongles and data cards, machine-to-machine communication devices, and the like.
  • personal portable digital assistance devices having wireless communication capabilities, including but not limited to cellular and other mobile phones (including smart phones), navigation devices, laptop/palmtop/tablet computers, digital cameras and music devices, Internet appliances, USB dongles and data cards, machine-to-machine communication devices, and the like.
  • Various embodiments of the computer readable MEMs 20B, 22B, 24B, 26B include any data storage technology type which is suitable to the local technical environment, including but not limited to semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory, removable memory, disc memory, flash memory, DRAM, SRAM, EEPROM and the like.
  • Various embodiments of the DPs 20A, 22A, 24A, 26A include but are not limited to general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and multi-core processors.
  • DSPs digital signal processors

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Abstract

Un algorithme, stocké dans une mémoire locale de dispositifs radio (noeuds d'accès au réseau/eNB et équipements utilisateur/UE), permet d'identifier une série périodique non consécutive de trames radio. Une sous-trame désignée de chaque série périodique non consécutive de trames radio contient une indication d'une configuration de sous-trames de liaison descendante-liaison montante, qui doit être utilisée à partir d'une trame radio subséquente prédéterminée (telle que la trame radio suivante). Ce système permet au réseau de changer la configuration de la liaison descendante-liaison montante plus fréquemment que lorsque celle-ci est changée simplement dans des données système, avec un surdébit de signalisation minimal. Dans des modes de réalisation spécifiques, l'algorithme est SFN mod 2 = 0, et les bits pour la signalisation de configuration de la liaison descendante-liaison montante sont brouillés au moyen de SI-RNTI. Dans un mode de réalisation, les bits de signalisation de la sous-trame et de la trame désignées servent à configurer la liaison descendante-liaison montante, et, dans d'autres trames/sous-trames, ils sont utilisés de manière classique pour le nombre de processus HARQ, l'indice d'attribution de liaison descendante et/ou pour réguler la puissance d'émission.
PCT/CN2013/079392 2013-07-15 2013-07-15 Changement flexible de la configuration de sous-trames de liaison descendante-liaison montante dans un système de communication sans fil WO2015006905A1 (fr)

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