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WO2013067695A1 - Amélioration de la qualité de réception dans des scénarios d'agrégation de porteuses à puissance de transmission limitée - Google Patents

Amélioration de la qualité de réception dans des scénarios d'agrégation de porteuses à puissance de transmission limitée Download PDF

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Publication number
WO2013067695A1
WO2013067695A1 PCT/CN2011/081998 CN2011081998W WO2013067695A1 WO 2013067695 A1 WO2013067695 A1 WO 2013067695A1 CN 2011081998 W CN2011081998 W CN 2011081998W WO 2013067695 A1 WO2013067695 A1 WO 2013067695A1
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Prior art keywords
transmission
control data
control
transmission power
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/CN2011/081998
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English (en)
Inventor
Wei Bai
Chunyan Gao
Jing HAN
Haiming Wang
Erlin Zeng
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Renesas Electronics Corp
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Renesas Mobile Corp
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Priority to PCT/CN2011/081998 priority Critical patent/WO2013067695A1/fr
Publication of WO2013067695A1 publication Critical patent/WO2013067695A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/36—Transmission power control [TPC] using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • H04W52/346—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading distributing total power among users or channels

Definitions

  • the present invention relates to improvement of receiving quality in UL transmission power restricted carrier aggregation scenarios. More specifically, the present invention relates to methods and devices configured to adapt scheduled transmissions in order to ensure a necessary detection quality of received data in case the transmission power of a transmitting device is limited due to parallel transmission of a plurality of data.
  • CA carrier aggregation
  • UE User Equipment
  • CC component carriers
  • one CC serves as a primary carrier.
  • the primary carrier represents the frequency block, on which the primary cell operates.
  • the primary cell is the cell, in which the UE performs the initial connection establishment procedure and in which essential control information are communicated. Once such initial connection is established, the UE may connect to further ceils, known as secondary cells.
  • the secondary cells operate on secondary carriers which represent further frequency blocks.
  • one primary carrier and at least one secondary carrier are aggregated to form coexistent primary and secondary cells.
  • CA includes contiguous aggregation of adjacent carriers and non-contiguous aggregation, wherein the respective carriers are not adjacent to each other.
  • Such non-contiguous aggregation can be realized with component carriers of one frequency band (Intra-band non-contiguous aggregation) or with component carriers of two or more frequency bands (Inter-band noncontiguous aggregation).
  • LTE Long Term Evolution
  • a terminal as a user equipment i.e. a UE communicates with a base station like an evolved Node B, i.e. an eNodeB.
  • eNodeB evolved Node B
  • RRH radio remote head
  • TA timing advance
  • inter-band carrier aggregation and further features like radio remote head (RRH) and the provision of repeaters are planned.
  • RRHs are radio units remote from the controlling, actual base station, where a base station may control more than one RRHs.
  • a UE communicates with an eNB and a RRH at different locations, or more general, with more than one receiving stations at different locations, the distances between the UE and each of the multiple receiving stations respectively may be different and thus different propagation delays may occur. Further, signals transmitted on two different component carriers of bands far apart from each other may be liable to different propagation delays. This introduces the necessity of multiple timing advance for LTE Rel-11.
  • the timing of uplink transmissions is to be controlled so that those
  • transmissions can be received from the eNodeB within a scheduled time slot. If a transmission arrives beyond the scheduled time slot, interference with transmissions of further UEs may appear. Since a distance between an UE and an eNodeB and other conditions affect signal propagation delays, the timing of said uplink transmissions have to be adjusted.
  • timing advance In order to compensate the propagation delay, a mechanism known as timing advance by which the uplink transmission timing at the UE is set earlier than the expected timing at the eNodeB, is deployed.
  • the timing advance procedure in LTE is divided into initial timing advance and timing advance updates.
  • the initial TA is used after the UE synchronizes its receiver to the downlink transmissions of the eNodeB and is set by means of the random access procedure: the eNodeB can estimate the uplink timing from the random access preamble and sends timing advance command including the time offset by which the UE should advance its transmission within a random access response (RAR) message. Since the UE is a mobile device, the propagation delay of transmissions may change from time to time.
  • timing advance updates are needed to update the uplink transmission timing to counteract changes in the arrival time at the eNodeB. It is performed by a closed-loop mechanism whereby the eNodeB measures the received up-link timing and issues timing advance update commands to the UE by means of medium access control (MAC) elements.
  • MAC medium access control
  • LTE Rel-11 it is planned to implement the multiple timing advance mechanism according to the originally timing advance mechanism by using the Random Access Channel (RACH).
  • RACH Random Access Channel
  • RACH preamble is to be transmitted on a secondary carrier. It may be possible that an UE with a restricted power state is requested to transmit such RACH preamble using a secondary carrier in parallel with another transmission using the primary channel, e.g. on a Physical Uplink Control Channel (PUCCH), on a Physical Uplink Shared Channel (PUSCH) or a Sounding Reference Symbol (SRS).
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • SRS Sounding Reference Symbol
  • a transmission using the PUCCH on primary carrier is considered as
  • the power of a PUCCH transmission is calculated using the following formula :
  • the power of a RACH preamble transmission is caiculated using the following formula :
  • PO_ P UCC H parameter composed of the sum of a parameter ⁇ NOMINAL, P U CCH provided by higher layers and a parameter -P 0 UE PUCCH provided by higher layers
  • a limited power state of an UE may occur for various reasons. It means that the required transmission power for all transmissions at a time exceeds the available transmission power of the UE.
  • the required transmission power may be relatively high because the distance between the UE and the eNodeB is high and a high pathloss between the UE and the eNodeB occurs.
  • the UE has to perform the transmission with a high transmission power.
  • the UE may transmit on more than one component carriers, so that the required entire transmission power consists of the transmission power for each used component carrier.
  • HARQ Hybrid Automatic Repeat Request
  • UE If the packet is received correctly, UE transmits acknowledgement (ACK) information, whereby on receiving of incorrectly received packets negative acknowledgement (NACK) information is transmitted.
  • ACK/NACK information is transmitted on a Physical Uplink Control Channel (PUCCH) of a primary carrier.
  • PUCCH Physical Uplink Control Channel
  • the UE when the UE has to transmit a RACH preamble on a secondary carrier as a reaction to a timing advance control request and at the same time ACK/NACK information on PUCCH on the primary carrier, high transmission power is needed, which may exceed the available transmission power of a UE in a power limited state.
  • a possible solution may be to firstly ensure the transmission power of the PUCCH transmission and using the remaining transmission power for the RACH preamble, controlled on the UE side. However, if the needed minimum power at the eNodeB can not be achieved, the RACH preamble may be not detected or detected with errors.
  • a further solution may be controlled on the eNodeB side. In order to implement such control, it would be necessary to implement and to allow transmissions by the UE on RACH only triggered by the eNodeB. As a result, on the first hand, the eNodeB side has information on when RACH
  • eNodeB side is able to trigger only one of both transmissions at a time and thus to decide, which of both transmissions is to be performed by the UE. If eNodeB decides RACH preamble to be transmitted, it triggers RACH preamble and suspends downlink data transmissions on all configured carriers in order to prevent ACK/NACK information to be transmitted by the UE. If eNodeB decides PUCCH transmission to be transmitted, it maintains downlink data transmissions and avoids transmission of RACH preamble by not triggering RACH preamble.
  • the introduced eNodeB side solution may be implemented always
  • the introduced eNodeB side solution may be also implemented based on power information of UE side.
  • a decision is made whether UE is in power limited state or not, and a non-simultaneous transmission of RACH preamble and ACK/NACK on PUCCH is only initiated in case of a power limited state of the UE.
  • ENodeB can achieve power status information by use of power headroom reports (PHR) transmitted by the UE and, in case of activated secondary carrier, by considering the maximum power reduction ( PR) and the pathloss. Power Headroom Reports are triggered after secondary carrier is activated.
  • PHR power headroom reports
  • the eNodeB sends the uplink grant for a secondary carrier for example 8 subframes after secondary carrier is activated (n+8).
  • PHR is then successfully decoded based on the first transmission of the UE and the power limited information is then available for the eNodeB for example 12 subframes after secodary carrier activation (n+12).
  • a RACH trigger can be transmitted after that and the corresponding RACH preamble can be transmitted by the UE 6 subframes later (n + 12+6).
  • a timebase of 1ms per subframe a RACH preamble can be transmitted 18ms after secondary carrier is activated, which presents a very big delay for the necessary timing advance information.
  • implementation may not solve the problem of parallel transmission on PRACH and PUCCH.
  • a device comprising communication means configured for communication, based on time slots, in a carrier aggregation mode aggregating a primary and at least one secondary carrier, control means configured to control transmission of first control data, indicative of a transmission timing of the device, in a first control channel using one of the at least one secondary carriers, and to control transmission of second control data in a second control channel using said primary carrier, receiving means configured to receive a first and a second power value, said second being smaller than said first power value, determination means configured to determine whether said transmission of first control data and said transmission of second control data are scheduled to take place within the same time slot, computation means configured to compute a first and a second transmission power value from said first and said second power value, said second being smaller than said first transmission power value, and both being applicable for transmission on the first control channel, allocation means configured to allocate a third transmission power to said transmission of second control data on the second control channel, and calculation means configured to calculate, responsive to affirmative determination result, whether available transmission power is greater
  • a device comprising communication means configured for communication, based on time slots, in a carrier aggregation mode aggregating a primary and at least one secondary carrier, control means configured to control transmission of first control data, indicative of a transmission timing of the device, in a first control channel using one of the at least one secondary carriers, and receiving means configured to receive a request for repetition of said transmission of first control data comprising a repetition number, wherein said control means is configured to repeat transmission of first control data as indicated by the repetition number.
  • a device comprising communication means configured for communication, based on time slots, in a carrier aggregation mode aggregating a primary and at least one secondary carrier, determination means configured to determine a first and a second receiving power value, said second being smaller than said first receiving power value and indicating a minimum receiving power required for save receiving, and said first receiving power value indicating a desired receiving power, and control means configured to control transmission of said first and second receiving power value.
  • a device comprising communication means configured for communication, based on time slots, in a carrier aggregation mode aggregating a primary and at least one secondary carrier, receiving means configured to receive first control data in a first control channel using one of the at least one secondary carriers, determination means configured to determine whether repetition of first control data is to be requested and to determine a number of repetitions of first control data to be requested, control means configured to control transmission of said request for repetition of first control data comprising said repetition number, accumulation means configured to accumulate said received repeated first control data, and detection means configured to detect information contained in said accumulated first control data.
  • a method comprising communicating, based on time slots, in a carrier aggregation mode aggregating a primary and at least one secondary carrier, controlling transmission of first control data, indicative of a transmission timing of the device, in a first control channel using one of the at least one secondary carriers, and controlling transmission of second control data in a second control channel using said primary carrier, receiving a first and a second power value, said second being smaller than said first power value, determining whether said transmission of first control data and said transmission of second control data are scheduled to take place within the same time slot, computing a first and a second transmission power value from said first and said second power value, said second being smaller than said first transmission power vaiue, and both being applicable for transmission on the first control channel, allocating a third transmission power to said transmission of second control data on the second control channel, calculating, responsive to affirmative result in said determining step, whether available transmission power is greater than or equal to said allocated third transmission power, controlling said transmission of second control data using said allocated
  • a method comprising communicating, based on time slots, in a carrier aggregation mode aggregating a primary and at least one secondary carrier, controlling transmission of first control data, indicative of a transmission timing of the device, in a first control channel using one of the at least one secondary carriers, receiving a request for repetition of said transmission of first control data comprising a repetition number, and repeating transmission of first control data as indicated by the repetition number.
  • a seventh aspect of the present invention there is provided a method, comprising communicating, based on time slots, in a carrier aggregation mode aggregating a primary and at least one secondary carrier, determining a first and a second receiving power value, said second being smaller than said first receiving power value and indicating a minimum receiving power required for save receiving, and said first receiving power value indicating a desired receiving power, and controlling transmission of said first and second receiving power value.
  • a method comprising communicating, based on time slots, in a carrier aggregation mode aggregating a primary and at least one secondary carrier, receiving first control data in a first control channel using one of the at least one secondary carriers, determining whether repetition of first control data is to be requested and determining a number of repetitions of first control data to be requested, controlling transmission of said request for repetition of first control data comprising said repetition number, accumulating said received repeated first control data, and detecting information contained in said accumulated first control data.
  • a computer program product comprising computer-executable components which, when executed on a computer, are configured to communicate, based on time slots, in a carrier aggregation mode aggregating a primary and at least one secondary carrier, and to control transmission of first control data, indicative of a transmission timing of the device, in a first control channel using one of the at least one secondary carriers, and to control transmission of second control data in a second control channel using said primary carrier, to receive a first and a second power value, said second being smaller than said first power value, determine whether said transmission of first control data and said transmission of second control data are scheduled to take place within the same time slot, to compute a first and a second transmission power value from said first and said second power value, said second being smaller than said first transmission power value, and both being applicable for transmission on the first control channel, to allocate a third transmission power to said transmission of second control data on the second control channel, to calculate, responsive to affirmative determination result, whether available transmission power is greater than or equal to
  • a computer program product comprising computer-executable components which, when executed on a computer, are configured to communicate, based on time slots, in a carrier aggregation mode aggregating a primary and at least one secondary carrier, and to control transmission of first control data, indicative of a transmission timing of the device, in a first control channel using one of the at least one secondary carriers, to receive a request for repetition of said transmission of first control data comprising a repetition number, and to repeat transmission of first control data as indicated by the repetition number.
  • a computer program product comprising computer-executable components which, when executed on a computer, are configured to communicate, based on time slots, in a carrier aggregation mode aggregating a primary and at least one secondary carrier, and to determine a first and a second receiving power value, said second being smaller than said first receiving power value and indicating a minimum receiving power required for save receiving, and said first receiving power value indicating a desired receiving power, and to control transmission of said first and second receiving power value.
  • a computer program product comprising computer-executable components which, when executed on a computer, are configured to communicate, based on time slots, in a carrier aggregation mode aggregating a primary and at least one secondary carrier, and to receive first control data in a first control channel using one of the at least one secondary carriers, to determine whether repetition of first control data is to be requested and to determine a number of repetitions of first control data to be requested, to control transmission of said request for repetition of first control data comprising said repetition number, to accumulate said received repeated first control data, and to detect information contained in said accumulated first control data.
  • the above computer program products may be embodied as a (volatile or non-volatile) computer-readable storage medium.
  • the methods, devices and computer program products described in this document are able to cope with limited transmission power on the UE side in case UE is prompted to perform two transmissions within a same time slot and using different carriers.
  • the UE is able to switch the transmission power of one of both transmissions between a desired transmission power (normal use) and a minimum required transmission power.
  • the UE is able to multiple repeat one of both transmissions. A receiver of such repeated transmissions is able to accumulate the repeated transmissions and to trace back the data transmitted with the repeated transmission.
  • FIGURE 1 illustrates exemplary method steps carried out by
  • FIGURE 2 illustrates exemplary method steps carried out by
  • FIGURE 3 illustrates exemplary method steps carried out by
  • FIGURE 4 illustrates exemplary method steps carried out by
  • FIGURE 5 illustrates a chart pointing out a case differentiation according to one aspect of the invention. Description of exemplary embodiments Exemplary aspects of the invention will be described herein below.
  • the following exemplary description refers to an environment of the LTE system (long term evolution) in which carrier aggregation is deployed. However, it is to be understood that this serves for explanatory purposes only. Other system differing from the LTE system can be adopted as long as they deploy carrier aggregation.
  • carrier aggregation one carrier is a primary carrier and at least one carrier aggregated with a primary component carrier is referred to as secondary carrier.
  • a primary and at least one secondary carrier are present.
  • the communication is performed based on time slots and in channels. Those channels are divided in payload channels and control channels.
  • payload channels are the physical downlink shared channel PDSCH for transmission of payload data in downlink direction and physical uplink shared channel PUSCH for transmission of payload data in uplink direction.
  • control channels are the physical downlink control channel PDCCH for transmission of control information in downlink direction and physical uplink control channel PUCCH for transmission of control
  • a further example for a control channel is the physical random access channel PRACH, a generally contention-based channel used for initial access of a UE to the network.
  • PRACH The transmissions on PRACH are also used for determination of the timing advance values for synchronized communication between UE and eNodeB.
  • PRACH is intended to be used for determination of multiple timing advance values on the at least one secondary carrier.
  • the PUCCH on primary carrier is mainly used to transmit the hybrid
  • the problem is therefore solved by setting two possible transmission power values for the PRACH preamble
  • the PRACH preamble is transmitted using one of both set transmission power values.
  • the transmission of the PRACH preamble is suspended until later point of time. In this way, the PUCCH transmission takes top priority on allocation of available transmission power.
  • the eNB may receive a plurality of PRACH preamble transmissions of different UEs within the same time slot.
  • the power with which said plurality of transmissions arrive at the eNB has to be within a certain range. It has to meet at [east a minimum required receiving power so that the eNB can detect the included information.
  • a desired arriving power greater than the minimum required receiving power allows, e.g., an increased signal to interference plus noise ratio (SINR) and thus increased receiving performance.
  • SINR signal to interference plus noise ratio
  • the values of the minimum required and the desired receiving power are transmitted from the eNB to the UE, Due to the path loss, the attenuation of an electromagnetic wave
  • the arriving power of a transmission at the eNB side is less than the original transmission power of said transmission at the UE side.
  • values of the minimum required transmission and the desired power values are calculated from the received values of the minimum required and the desired receiving power.
  • the eNB has more flexibility to determine a desired receiving power and thus a detection quality. Furthermore, since UE can choose situation-dependently between two power values, an " increased chance for successful transmission is provided.
  • the problem is solved by performing transmission of PRACH preamble repeatedly using the available, restricted transmission power.
  • the eNB then has the ability to accumulate the repeated transmissions in time domain. Subsequently, the eNB can obtain data from those accumulated signals.
  • the PRACH preamble can be transmitted without influencing acknowledgement transmissions on PUCCH and thus without influencing payload downlink transmissions.
  • Figure 1 illustrates exemplary method steps carried out by
  • the process starts in an initial step SI at the UE.
  • a first power value and a second power value are received.
  • the first power value represents a desired receiving power value at the eNB side.
  • the second power value represents a minimum required receiving value at the eNB side, which is explained later. After that, the procedure advances to step S3.
  • step S3 it is determined, whether first and second control data are scheduled to take place within the same time slot.
  • first control data represents a RACH preamble and second control data represents PUCCH control data, e.g. ACK/NACK data.
  • PUCCH control data e.g. ACK/NACK data.
  • step S3 In case first and second control data are scheduled to be transmitted within the same time slot (YES in step S3), the procedure advances to step S4.
  • step S4 a first transmission power (TxP) and a second transmission power are computed.
  • the computation is necessary, since the received power values represent receiving power values. As stated above, a transmission is liable to path loss at the transmission path. If the
  • the transmission is performed with the received power value, said transmission arrives at the eNB side with an arriving power less than the requested receiving power.
  • the path loss of the transmission path is compensated.
  • Such computation may be implemented by adding an estimated path loss value, as already mentioned above.
  • step S5 the transmission power necessary for the transmission in PUCCH (third transmission power) is allocated to that transmission and the procedure advances to step S6.
  • step S6 it is calculated whether available transmission power is greater than or equal to the allocated third transmission power. In case the available transmission power is less than the allocated third transmission power (No in step S6), the procedure advances to the end step S12, since the transmission in PUCCH can not be performed. In case the available transmission power is greater than or equal to the allocated third
  • step S6 the procedure advances to step S7.
  • step S7 it is calculated whether available transmission power is greater than or equal to the sum of the allocated third transmission power and the computed second transmission power value. In case the available transmission power is less than that sum (No in step S7), the procedure advances to step S8.
  • step S8 the second control data is transmitted using the allocated third transmission power and the transmission of first data (RACH preamble) is suspended until a later point of time. After that, the procedure advances to the end step S12.
  • step S9 it is calculated whether available transmission power is greater than or equal to the sum of the allocated third transmission power and the computed first transmission power value. In case the available transmission power is less than that sum (No in step S9), the procedure advances to step S10. In step S10 the second control data is transmitted using the allocated third transmission power and the first control data is transmitted using the computed second transmission power value. After that, the procedure advances to the end step S12.
  • step S9 the procedure advances to step Sll .
  • step Sll the second control data is transmitted using the allocated third transmission power and the first control data is transmitted using the computed first transmission power value. After that, the procedure advances to the end step S12.
  • FIG. 2 illustrates exemplary method steps carried out by
  • the process starts in an initial step S21 at the eNB.
  • a first receiving power and a second receiving power are determined for a reception of first control data in a first control channel of one of at least one secondary carriers.
  • the second receiving power represents a minimum required receiving power.
  • a transmission has to arrive at the receiving eNB with at least said minimum receiving power to allow a detection of data in the received signal.
  • the first receiving power represents a desired receiving power, which is greater than the minimum required receiving power. Transmissions arriving at the receiving eNB with the desired receiving power provide an increased receiving performance, since e.g. a signal to interference plus noise ratio (SINR) can thus be increased. Subsequent to that determination the procedure advances to step S23.
  • the first and second receiving power values are transmitted.
  • the transmission of both parameters may be implemented in the known radio resource control (RRC) signaling.
  • the desired receiving power value may be communicated by using the existing RRC parameter
  • RRC signaling may be implemented as follows: powerRampingParameters SEQUENCE ⁇
  • step S24 second control data is received on the primary carrier with a third receiving power. Further, first control data is received with the first or second receiving power. After that, the procedure advances to step S25, denoting the end of the procedure.
  • FIG. 3 illustrates exemplary method steps carried out by
  • step S32 a request for repetition of transmission of first control data is received.
  • request may contain an instruction to transmit said first control data more than one time and the number how often said first control data is to be transmitted.
  • the request may be performed via dedicated signaling, e.g. via downlink control information DCI received on physical downlink control channel PDCCH. Such possible DCI signaling will be described later.
  • the procedure advances to step S33.
  • step S33 the first control data is transmitted one time using the available transmission power. Further, an internal counter is set to 1. The internal counter represents the number how often the first control data is already transmitted.
  • step S34 monitoring of receiving of second control data is started. As described later, by monitoring the receiving, repeating of transmission of first control data can be interrupted, if it is not necessary anymore.
  • the procedure then advances to step S35.
  • step S35 it is determined whether second control data is received. In case the second control data is received (Yes in step S35) f the procedure advances to step S41 denoting the end of the procedure. In case no second control data is received (No in step S35), the procedure advances to step S36.
  • step S36 the internal counter representing the number how often the first control data is already transmitted is compared with the number how often said first control data is to be transmitted. If the internal counter is less than the number how often said first control data is to be transmitted (Yes in step S36), the procedure advances to step S37. In step S37 the first control data is transmitted one time again. Furthermore, the internal counter is incremented by 1. After that, the procedure returns to step S35.
  • step S36 If the internal counter is equal to or greater than the number how often said first control data is to be transmitted (No in step S36), the maximum transmission number is reached. The procedure advances then to step S38. Since on eNB side the plurality of first data transmissions are to be accumulated, UE has to wait for some time slots in order to allow calculation time and further delay. Thus, in step S38, it is waited for a predetermined number of time slots. Note that the monitoring of the receiving of second control data is still active. After that, the procedure advances to step S39.
  • step S39 it is determined whether second control data is received. In case second control data is received (Yes in step S39), the procedure advances to step S41 denoting the end of the procedure. In case no second control data is received (No in step S39), the procedure advances to step S40.
  • UE is requested to transmit first control data 3 times in time slot m, m+ 1 and m+2. Further, the predetermined number of time slots UE has to wait for is 3. After the transmission in time slot m, UE starts to monitor receiving of second control data in order to interrupt possible further transmissions. After the last transmission of first control data UE waits for the predetermined number of time slots, which may consist of an eNB processing time (e.g. 3 time slots) and a waiting window length (e.g. 3 time slots). Thus, UE waits from time slot m+2 to time slot m+2+3+3 for a possible receiving of second control data.
  • an eNB processing time e.g. 3 time slots
  • a waiting window length e.g. 3 time slots
  • step S40 it is determined that it is to be considered that the transmission of the first control data did not succeed. Such result can be used for a further processing. However, the procedure advances to the end step S41 without successful transmission of first control data.
  • FIG. 4 illustrates exemplary method steps carried out by
  • the process starts in an initial step S51 at the eNB.
  • step S52 the number how often first control data is to be transmitted by a UE is determined.
  • a request for repetition of transmission of first control data is transmitted.
  • Such request may contain an instruction to transmit said first control data more than one time and the determined number how often said first control data is to be transmitted.
  • the request may be performed via dedicated signaling, e.g. via downlink control information DCI transmitted on physical downlink control channel PDCCH.
  • DCI signaling transmitted by the eNB may be implemented as follows.
  • the intended DCI format may be 1A, which is used for the compact scheduling of one PDSCH codeword in one cell and random access
  • a possible bit string may be defined as follows :
  • Format 1A is used for random access procedure initiated by a PDCCH order only if format 1A CRC is scrambled with C-RNTI and all the remaining fields are set as follows:
  • the number how often said first control data is to be transmitted and also the PRACH resource to be used by the UE for the transmission of first data may be indicated.
  • PRACH opportunity domain even PRACH 1 st PRACH Resource Index in subframe opportunity
  • the table renders the current assignment of PRACH Mask Indexes and PRACH resources in frequency division duplex (FDD) mode and time division duplex (TDD) mode of the exempiarily used LTE system. It is to be noted that for FDD mode the PRACH Mask Indexes 13, 14 and 15 and for TDD mode the PRACH Mask Indexes 7, 8, 9 and 10 are unused. Those unused assignments may be used for further instructions regarding a repetition of transmission of first control data.
  • step S54 first control data is received, After that, in step S55, the power in time domain of said received first control data is accumulated with power in time domain of possibly prior received first control data transmission(s) and the procedure advances to step S56.
  • step S56 it is determined whether the information contained in the accumulated power in time domain of the one ore more received
  • step S56 the procedure advances to step S58.
  • step S58 second control data is generated based on the information contained in the first control data transmission.
  • the second control data may be a random access response (RAR) message, containing timing advance command including the time offset by which the UE should advance its transmission, wherein the time offset may be estimated from the received first control data transmission.
  • RAR random access response
  • step S57 it is determined whether further transmission of first control data is received. In case further transmission of first control data is received (Yes in step S57), the procedure returns to step S55, where the power in time domain of said yet received first control data transmissions are accumulated again. In case no further transmission of first control data is received (No in step S57), the procedure advances to step S60, denoting the end of the procedure.
  • Figure 5 illustrates a chart pointing out a case differentiation carried out by and implemented at the User Equipment side, UE side, according to one aspect of the invention.
  • the explanation of steps S6 to Sl l is supported by the shown chart.
  • the available transmission power of the UE is represented. Prominent values, the third transmission power, the sum of the third transmission power and the second transmission power and the sum of the third transmission power and the first transmission power, are marked.
  • the hachured areas denote the cases of the value of the available transmission power
  • the transmission power On the lower axis, the corresponding results are represented. At that, the transmission of the first data and the second data are considered separately. As can be realized by means of the chart of figure 5, if the available transmission power is less than the sum of the third transmission power and the second transmission power, the transmission of first control data is suspended. If the available transmission power is greater than or equal to the sum of the third transmission power and the second transmission power and less than the sum of the third transmission power and the first transmission power, the first control data is transmitted using the second transmission power.
  • the invention is implemented in an environment such as LTE system adopting carrier aggregation.
  • Exemplary embodiments of the invention are represented by methods and/or correspondingly configured devices such as eNodeBs and/or UEs. More specifically, the invention generally relates to modem modules of such devices.
  • Embodiments of the present invention may be implemented in software, hardware, application logic or a combination of software, hardware and application logic.
  • the software, application logic and/or hardware generally, but not exclusively, may reside on the devices' modem module.
  • the application logic, software or an instruction set is maintained on any one of various conventional computer-readable media.
  • a "computer-readable medium" may be any media or means that can contain, store, communicate, propagate or transport the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer or smart phone, or user equipment.
  • the present invention relates in particular but without limitation to mobile communications, for example to environments under LTE, WCDMA, WIMAX and WLAN and can advantageously be implemented in user equipments or smart phones, or personal computers connectable to such networks. That is, it can be implemented as/in chipsets to connected devices, and/or modems thereof.
  • the different functions discussed herein may be performed in a different order and/or concurrently with each other. Furthermore, if desired, one or more of the above-described functions may be optional or may be combined.
  • the present invention proposes methods, devices and computer program products in relation to a communication module configured for
  • first and second control data using different carriers is controlled.
  • First and second power values are received. It is determined, whether said
  • transmissions of first control data and second control data are scheduled to take place within the same time slot.
  • First and second transmission power values are computed from said first and second power values.
  • a third transmission power is allocated to said transmission of second control data. It is calculated whether available transmission power is greater than or equal to said allocated third transmission power. Transmission of second control data using said allocated third transmission power is controlled.
  • Transmission power of first control data is controlled dependent on the amount by which the available transmission power is greater than the third transmission power.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention se rapporte à des procédés, à des dispositifs et à des produits programmes d'ordinateur en lien avec un module de communication conçu pour la communication, basée sur des créneaux temporels, en mode d'agrégation de porteuses agrégeant une porteuse primaire et au moins une porteuse secondaire. La transmission de premières et secondes données de commande à l'aide de différentes porteuses est commandée. Il est déterminé si lesdites transmissions des premières données de commande et des secondes données de commande doivent se dérouler dans le même créneau temporel. Les valeurs des première et deuxième puissances de transmission sont calculées. Une troisième puissance de transmission est attribuée à ladite transmission des secondes données de commande. Il est calculé si la puissance de transmission disponible est supérieure ou égale à ladite troisième puissance de transmission attribuée. La transmission des secondes données de commande à l'aide de cette troisième puissance de transmission attribuée est commandée. La puissance de transmission des premières données de commande est commandée suivant la supériorité de la puissance de transmission disponible par rapport à la troisième puissance de transmission.
PCT/CN2011/081998 2011-11-09 2011-11-09 Amélioration de la qualité de réception dans des scénarios d'agrégation de porteuses à puissance de transmission limitée Ceased WO2013067695A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115915470A (zh) * 2021-08-06 2023-04-04 大唐移动通信设备有限公司 传播时延的处理方法、装置、终端及网络侧设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101299623A (zh) * 2007-04-30 2008-11-05 华为技术有限公司 功率分配方法、系统及发送端
WO2010101508A1 (fr) * 2009-03-05 2010-09-10 Telefonaktiebolaget L M Ericsson (Publ) Procédé de commande de puissance
CN102164402A (zh) * 2011-05-03 2011-08-24 大唐移动通信设备有限公司 一种配置载波发射功率的方法及装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101299623A (zh) * 2007-04-30 2008-11-05 华为技术有限公司 功率分配方法、系统及发送端
WO2010101508A1 (fr) * 2009-03-05 2010-09-10 Telefonaktiebolaget L M Ericsson (Publ) Procédé de commande de puissance
CN102164402A (zh) * 2011-05-03 2011-08-24 大唐移动通信设备有限公司 一种配置载波发射功率的方法及装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115915470A (zh) * 2021-08-06 2023-04-04 大唐移动通信设备有限公司 传播时延的处理方法、装置、终端及网络侧设备

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