WO2010034354A1 - Procédé d’utilisation d’un matériel employé par un utilisateur et matériel employé par un utilisateur - Google Patents

Procédé d’utilisation d’un matériel employé par un utilisateur et matériel employé par un utilisateur Download PDF

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Publication number
WO2010034354A1
WO2010034354A1 PCT/EP2008/063023 EP2008063023W WO2010034354A1 WO 2010034354 A1 WO2010034354 A1 WO 2010034354A1 EP 2008063023 W EP2008063023 W EP 2008063023W WO 2010034354 A1 WO2010034354 A1 WO 2010034354A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
information density
information
density indicator
tti
Prior art date
Application number
PCT/EP2008/063023
Other languages
English (en)
Inventor
Thomas Malcolm Chapman
Lukasz Koszulanski
Krystian Pawlak
Malgorzata Wimmer
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Nokia Siemens Networks Oy
Priority date (The priority date 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 date listed.)
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Priority to PCT/EP2008/063023 priority Critical patent/WO2010034354A1/fr
Publication of WO2010034354A1 publication Critical patent/WO2010034354A1/fr

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Classifications

    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
    • H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025—Transmission of mode-switching indication
    • 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
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • 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
    • H04L1/189—Transmission or retransmission of more than one copy of a message

Definitions

  • the present invention relates to a method of operating a user equipment, in particular a user equipment of a cellular communication network. Moreover, the invention relates to a method of transmitting data. Further, the invention relates to a user equipment. Furthermore, the invention relates to a processing unit.
  • TTIs transmission time intervals
  • UEs power-limited user equipments
  • TTI transmission time intervals
  • switching to a longer TTI has some disadvantages.
  • TTI switching can only be done slowly, with a risk that data packets get lost during the switching if the radio channel is changing rapidly, due to the fact that it is managed from the radio network controller (RNC) .
  • RNC radio network controller
  • a conservative algorithm has disadvantages such as reducing system capacity and/or increasing UE battery usage. Since the 2 ms TTI can benefit from CPC and is more link efficient, this contributes to reduced capacity and UE battery life. Also, the nodeB scheduler must manage 2 TTI lengths.
  • One of the alternatives proposes enhancement of the enhanced uplink (EUL) coverage by decreasing the time between retransmission by letting the UE make a certain number of repetitions without waiting for a NACK in between them. This allows the UE to transmit more repetitions before the maximum packet delay is reached.
  • EUL enhanced uplink
  • a method of operating a user equipment of a communication network comprises sending an information density indicator from the user equipment to another network element, wherein the information density indicator relates to a time interval during which an amount of information is sent .
  • the communication network may be an UMTS communication network which may use a WCDMA protocol, for example.
  • the another network element may be a serving nodeB, a non serving nodeB, another user equipment, a relay node, or the like.
  • the information duration may relate to a time interval during which a number of information is transmitted.
  • the information density indicator may relate to an amount of information sent during a respective time interval, wherein the information density may relate to a number of information per second.
  • a method of transmitting data from a first network element to a second network element of a communication network comprises operating a user equipment according to an exemplary aspect of the invention, and performing a transmission of a data set taking into account the information density indicator.
  • the first and/or the second network element may be the user equipment, a serving nodeB, a non serving nodeB, another user equipment, a relay node, or the like.
  • a user equipment for a communication network comprising a transmitting unit adapted to send an information density indicator from the user equipment to another network element, wherein the information density indicator relates to a time interval during which an amount of information is sent.
  • the UE may comprise a change unit to change the information density based on the information density indicator.
  • the user equipment may comprise a decision unit adapted to decide on a change of the information density indicator.
  • a processing unit for a nodeB of a communication network is provided, wherein the processing unit is adapted to process an information density indicator received from a user equipment .
  • the processing may relate to the decoding, interpreting, or the like of the information density indicator.
  • the nodeB may switch a state and/or may take into account the content of the information density indicator for further transmission and/or receptions in the communication network.
  • a program element is provided, which, when being executed by a processor, is adapted to control or carry out a method according to an exemplary aspect of the invention.
  • a computer- readable medium in which a computer program is stored which, when being executed by a processor, is adapted to control or carry out a method according to an exemplary aspect of the invention.
  • the term "information density indicator” may particularly denote an indicator associated to a time interval during which an amount of bits, data or information bits can be transmitted.
  • the information density should be distinguished from bit transfer rates since according to the concept of this application a repeated transmission or repetition or TTI length increase would not increase the information density. That is, in case a transmission of identical information or bits is repeated or transmitted in larger TTI the information density is decreased when the bit transfer rate is held constant.
  • time interval may particularly denote one or a multiple of transmission time intervals used for a transmission. It may also denote a number of frames or time- slots or any other indications that can be interpreted as a time interval
  • information density indicator may relate to one parameter only, e.g. to the time duration or to a repetition rate, or to more than one parameter, e.g. switching time and number of repetitions, e.g. the TTI length and the amount of information to be transmitted during that length.
  • the value of these parameters may be contained distinctly or separately from each other or both together in the information density indicator. It may also be possible to send several information density indicators each relating to a specific parameter .
  • the signalling may be performable independent from the fact which entity takes the decision on initiating the change of the state, e.g. starting repetitions or TTI switching.
  • the method may be used for soft handover to inform non serving nodeBs .
  • the user equipment is sending the information density indicator in response to a request for changing the information density of sent information.
  • the request for changing the information density may be initiated by a nodeB, e.g. a serving nodeB, the user equipment, or another network element.
  • the request for changing may be implemented in HS-SCCH orders in case of a UMTS communication network.
  • the signalling may thus be performed independently of the entity performing the decision to alter or change the communication scheme, e.g. by initiating repetitions or TTI switching to enhance the coverage.
  • the serving nodeB may make the decision to change the amount of repetitions or to change the TTI length, i.e. the information density.
  • the serving nodeB may send this decision to the UE.
  • the serving nodeB may have a reception device adapted to receive the UE power headroom from a UE. For example, in order to inform the UE about the amount of repetitions the serving nodeB may send orders via e.g. the fast Ll signalling (HS-SCCH orders) . Alternatively, the UE may decide on the amount of repetitions, in which case the UE needs to signal the number of repetitions to the serving Node B.
  • HS-SCCH orders fast Ll signalling
  • the UE may decide on the amount of repetitions, in which case the UE needs to signal the number of repetitions to the serving Node B.
  • the changing request is initiated when a predetermined threshold of a parameter is reached.
  • the parameter may be indicative of a coverage of a respective cell of the communication network.
  • the term "reaching" the threshold includes a rising above the threshold as well as falling below the threshold.
  • the parameter is the user equipment power headroom.
  • the changing request may be initiated when the UE power headroom (UPH) is reaching a limit or threshold.
  • the limit may be reached by rising above or falling below the threshold. Therefore, the invention may foresee triggering of a state change mechanism, e.g. the bundling mechanism, based on uplink power headroom (UPH) reports.
  • UPH uplink power headroom
  • the decision may be made that consecutive TTIs are grouped and assigned to the same HARQ process.
  • adaptation of TTI length or repetition may be based on power limit so that when UE power is reaching power limit, the UE changes the number of repetitions that are performed without waiting for respective ACK/NACK messages or changes the TTI length, e.g.
  • the reference point for the UE transmission power headroom may be the antenna connector of the UE.
  • there can be more than one threshold e.g. an upper threshold and a lower threshold, e.g. a lower power value. There can be for example defined a threshold that is below the UE power headroom.
  • the changing request is initiated every time when the predetermined threshold of the parameter is reached.
  • an iterative or stepwise adaptation of an information density may be enabled, e.g. a stepwise increase or decrease of a repetition rate or TTI length. That is, in a first step the information density may be increased only a small step. However, if after this small step, corresponding to a small adaptation, the corresponding information density is still not suitable a further changing request may be initiated or sent to further adapt the information density. That is, the number of repetitions may be set gradually - according to the current UPH measurements, e.g. two TTIs are grouped together when power limitation is signalled for the first time, four TTIs may be merged when UPH reports power limitation for the second time and finally eight repetitions may be utilized with third UPH alarm
  • the information density indicator relates to a repetition rate.
  • the term "repetition rate" may particularly denote the number of times a transmission of a specific information is repeated without receiving a request of retransmitting the specific information, e.g. by a non acknowledge (NACK) message. This may correspond to a so called transmission time interval
  • the request for changing the information density may be a request to change the number of repetitions, e.g. decreasing the number of repetitions or increasing the number of repetitions.
  • the information density indicator relates to a transmission time interval length.
  • the transmission time interval (TTI) length may be set to a specific value based on the information density indicator.
  • the information density indicator may indicate a state in which the transmission time interval has a length of 2 ms, 4 ms, 6 ms, 8 ms, or 10 ms .
  • the changing of the TTI may also be called switching so that this process may be called TTI switching.
  • the request for changing the information density may be a request to change the TTI length, e.g. decreasing the TTI length or increasing the TTI length.
  • the information density indicator is sent in a data frame.
  • the data frame may be or contain a transport format combination indicator (TFCI) or an enhanced TFCI (E- TFCI) .
  • TFCI transport format combination indicator
  • E- TFCI enhanced TFCI
  • the known E-TFCI may be reinterpreted so that the information density indicator is associated to a TTI length or number of repetition, for example, may be encoded in the E-TFCI leading to a common multiplexing/transmitting of the number of repetitions and the data frames.
  • the E-TFCI in addition to the amount of information to be transmitted, may include the information on the TTI length or the number of repetitions.
  • a mapping between the chosen E-TFCI and the corresponding E-DCH transport block size is given in a transport block size table that is e.g. valid for 2ms TTI and for 10 ms TTI.
  • the E-TFCI mapping contains the information on the TTI length.
  • the mapping may also be given in a table that contains the amount of repetitions.
  • a user equipment may select the E-TFCI mapping based on such table.
  • a nodeB may select the E-TFCI mapping based on such table.
  • the user equipment may select the E-TFCI mapping base on this table, there has to be a signaling from the base station or the radio network controller to the UE that UE has to use this special table.
  • the information density indicator corresponds to a signal power.
  • the information density indicator may correspond to a signal power ratio, e.g. a ratio between a power transmitted per TTI and an accumulated transmitted power. That is, an indication of an information density may be given by adjusting or setting a power ratio to a specific value.
  • the power ratio between E-DPDCH and E- DPCCH may be adjusted to signal the information density indicator, e.g. the power ratio between E-DPDCH or E-DPCCH and DPCCH may be adjusted to signal the information density indicator.
  • the transmission of the data set includes a repeated transmission, and wherein in the repetition control channel information is not transmitted.
  • control information e.g. a DPCCH or E-DPCCH
  • this information may only be transmitted once at the beginning and in the repetition or retransmission this information is not retransmitted or repeated.
  • the repeated transmission may be free of control channel information.
  • the transmission of E-DPCCH may be maintained in parallel to all repetitions, for the sake of the transmitted power in uplink it may be advantageous to maintain E-DPCCH only during first TTI in the bundle. The energy saved during repetitions could be utilized for data transmission.
  • Such a schema may be in particular useful for WCDMA schemata .
  • Next, further exemplary embodiments of the user equipment are described. However, these embodiments also apply to the method of operating a user equipment, the method of transmitting data, the processing unit for a nodeB, the program element, and the computer-readable medium.
  • the user equipment is adapted to perform a transmission time interval switching based on the information density indicator.
  • the user equipment is adapted to change a number of repetitions an information is sent based on the information density indicator.
  • the user equipment may be adapted for transmitting data to a plurality of nodeBs or base stations.
  • a processing unit may be included into a nodeB or base station which may know or which may not know the decision on the information density, e.g. a base station from the active set, e.g. a non serving base station.
  • the information density indicator may be used to signal the decision to the nodeB, e.g. the serving nodeB.
  • the nodeB or base station may be adapted to perform a soft handover to another nodeB.
  • a communication network comprising a plurality of user equipments according to an exemplary aspect of the invention and a plurality of nodeBs having a processing unit according to an exemplary aspect of the invention, wherein at least one of the plurality of nodeB is adapted to perform a soft handover to another one of the plurality of nodeBs .
  • Summarizing an exemplary aspect of the invention may be seen in providing a method of informing network elements of a communication network over a used communication or coding scheme by using an information density indicator.
  • This information density indicator is sent by a user equipment and may relate to a repetition number and/or a TTI length.
  • the information density indicator may in particular be sent to a non serving nodeB in order to facilitate a soft handover in case of UMTS.
  • Such a method may enable a TTI bundling in an UMTS communication network which still aligns with the existing number of HARQ processes, the possible number of autonomous repetitions may be limited to ⁇ 0, 1, 3, 7 ⁇ for 2 ms TTI and ⁇ 0, 1, 3 ⁇ for 10 ms TTI, which results in a total transmission burst (including the first transmission) of ⁇ 1, 2, 4, 8 ⁇ TTIs in the 2 ms TTI case and ⁇ 1, 2, 4 ⁇ TTIs in the 10 ms TTI case.
  • LTE bundling solution may not require UE to nodeB signalling as the serving nodeB sets the number of retransmissions, and soft handover (SHO) is not defined for LTE.
  • non serving nodeBs may not be aware of the number of transmissions and/or may not be aware of the information density, e.g. the number of repetitions or the TTI length. Therefore, non serving nodeBs should be informed about applied repetition scheme.
  • the use of Iub for this purpose would require involvement of the radio network controller
  • a viable way for informing the non serving nodeBs of the amount of repetitions or retransmissions may be UE signalling, even if the serving nodeB configures the number of transmissions, configures the number of repetitions, and/or configures the TTI length.
  • the serving nodeB configures the number of transmissions, configures the number of repetitions, and/or configures the TTI length.
  • signalling methods may be E-TFCI reinterpretation, offset detection on E-DPCCH, or mixture of E-TFCI reinterpretation and offset detection on E-DPCCH.
  • method based on similarity of consecutive TTI or so called blind detection methods may be used.
  • the bundling and/or TTI switching may be activated by either serving nodeB orders an UE to transmit additional retransmissions, or UE may autonomously decide about out-of-HARQ cycle transmissions. Both decisions may be taken based on the information about power headroom available at a UE.
  • TTI bundling scheduled by a nodeB may be that HARQ process management may be easily maintained.
  • allowing UE for autonomous repetitions may benefit in a quick reactions to the uplink power headroom fluctuations.
  • the signalling applied by a UE may be utilized to handle soft handover. With such approach non serving nodeBs will be notified about applied retransmission or repetition scheme.
  • E-DPCCH power offset is used for indicating the information density, i.e. as an information density indicator" this may in particular relate to a TTI length, whereas a using of E-TFCI as information density indicator may in particular relate to a number of bits or number of repetitions.
  • the E-TFCI in addition to the amount of information to be transmitted, may include the information on the TTI length or the number of repetitions.
  • the E-DPCCH power offset may also be used for indicating TTI length and/or number of repetition as well.
  • Fig. 1 schematically shows a TTI bundling concept.
  • Fig. 2 schematically illustrates effects of a gradual activation of a TTI bundling.
  • Fig. 3 schematically illustrates effects of a gradual deactivation of a TTI bundling.
  • Fig. 4 schematically illustrates E-DPCCH gating during repetitions .
  • Fig. 5 schematically illustrates a TTI switching.
  • Fig. 6 schematically illustrates a communication network.
  • Fig. 1 schematically shows a transmission time interval (TTI) bundling concept in the context of a HARQ process.
  • TTI transmission time interval
  • the first line 100 a transmission of data according to a normal HARQ process is shown without performing a bundling and thus corresponding to an ordinary high speed uplink packet access (HSUPA) .
  • HSUPA high speed uplink packet access
  • a retransmission is performed of eight packets 101 to 108 corresponding to a time interval of 16 ms in case a NACK is received at the sending side.
  • HSUPA transmission implementing TTI bundling is schematically depicted.
  • the same data packet 111 is repeated eight times before a new data packet 112 is transmitted. The repetitions are performed without waiting for a NACK message.
  • the whole bundle of the data packets 101 is retransmitted.
  • the bundle size is 8. However, different bundle sizes, e.g. 2 and 4 are also possible.
  • Fig. 2 schematically illustrates effects of a gradual activation of a TTI bundling.
  • TTI bundling mechanism operates in power limited scenarios, hence it may be connected to uplink power headroom (UPH) measurements. That is, the activation of additional repetitions may be triggered by the UPH measurements - as soon as power limitation at UE is reported, TTI bundling mechanism may be enabled.
  • UPH uplink power headroom
  • TTI bundling mechanism may be enabled.
  • TTI bundle size is increased gradually according to the available bundle size of ⁇ 1, 2, 4, 8 ⁇ TTIs.
  • the effect of a gradual activation of repetitions is schematically depicted in Fig. 2.
  • Fig. 2 shows the transmission power (Tx power) in dB over time.
  • Line 201 indicates the maximum Tx power
  • line 202 indicates the total Tx power showing different areas corresponding to different bundling sizes.
  • line 203 indicates the accumulative Tx power and line 204 indicates the transmission power of the dedicated physical control channel (DPCCH) .
  • DPCCH dedicated physical control channel
  • the points in time when the transmission scheme changes are labelled in Fig. 2.
  • a first repetition is activated corresponding to a bundle size of 2 and leading to a first change of the continuous course of the total Tx power.
  • a second repetition is activated corresponding to a bundle size of 4 and leading to a second change of the continuous course of the total Tx power.
  • a third repetition is activated corresponding to a bundle size of 8 and leading to a third change of the continuous course of the total Tx power.
  • ⁇ c , ⁇ d and ⁇ ec are abstract variables that relate to the power relationships between the transmitted channels.
  • the ratio ⁇ d/ ⁇ c is the ratio of the amplitude of the DPDCH signal to the DPCCH signal amplitude
  • ⁇ ed / ⁇ c is the ratio of the E-DPDCH signal amplitude to the DPCCH signal amplitude.
  • the repetition of a TTI may result in a decreased transmitted power per TTI however the accumulated power is kept on the same level. This mechanism may save the resources of uplink power headroom, thus possibly maintaining the transmission in power limited conditions.
  • the amount of repetitions may be increased if saved power resources will be consumed again by power control mechanism.
  • the size of TTI bundle may be increased gradually, i.e. after second UPH alarm three repetitions should be utilized and finally after third UPH report bundle size should increase to 8 TTIs or seven repetitions.
  • This scheme may keep the continuous level of DPCCH which results in good channel estimation and proper SIR target setting, thus possibly enables correct reception and power control behaviour.
  • Fig. 3 schematically illustrates effects of a gradual deactivation of a TTI bundling.
  • Fig. 2 is repeated while on the right side the deactivation of repetitions is shown.
  • the activation part it is referred to the description of Fig. 2.
  • the bundle size is lowered to four TTIs.
  • the bundle size is lowered again to two TTIs, while at point in time 310 the repetition mode is deactivated.
  • the mechanism of TTI bundling may also take into account that available uplink power headroom can increase. Therefore another trigger is responsible for decreasing the size of TTI bundle whenever sufficient power is reported by UPH measurements. Calculations of the trigger may utilize equation 1 taking into account lower number of repetitions, i.e. if TTI bundle comprises of 8 TTIs, N rep should be equal to 4. The deactivation TTI bundling may also be done gradually.
  • E-DPCCH gating during repetitions may be achieved with E-DPCCH gating during repetitions.
  • Transmission of E-DPCCH may be kept during all of the repetitions.
  • the overhead energy saved during retransmissions could be utilized for data transmission, i.e. E-DPDCH power for all repetitions might be rescaled to keep power level equal to the first TTI.
  • the maintaining of the E-DPCCH only during the first TTI in the bundle is schematically illustrated in Fig. 4, wherein the E-DPCCH 401 signal is only included into the first TTI 402 while the seven repetitions only include the data signal E-DPDCH 403.
  • the TTI bundling mechanism may be activated either by serving nodeB (NB) which orders an UE to transmit additional retransmissions, or by UE, which autonomously decides about out-of-HARQ cycle transmissions. Both decisions may be taken based on the information about power headroom available at a UE.
  • NB serving nodeB
  • UE which autonomously decides about out-of-HARQ cycle transmissions. Both decisions may be taken based on the information about power headroom available at a UE.
  • Ll orders may act as the pointer to the predefined repetition settings, defined by the RNC and delivered to the UE beforehand via RRC signalling. After receptions of the Ll order the UE starts additional repetitions.
  • Another option is to allow UE decide autonomously about additional repetitions.
  • serving nodeB should be informed about retransmission scheme applied.
  • non serving nodeBs always need to be informed of the number of repetitions used.
  • possible solutions may be E-TFCI reinterpretation, offset detection on E-DPCCH, or mixture of E-TFCI reinterpretation and offset detection on E-DPCCH.
  • methods based on similarity of consecutive TTI or so called blind detection methods may be used.
  • the number of repetitions or TTI length may be encoded in the TFCI and hence the information about number of repetitions may be transmitted/multiplexed together with the data frames.
  • E-DPCCH remains structured as in Release 6, hence the same amount of E-TFCI bits might be available for a reduced TFC set. This might allow for E-TFCI bits to signal in a paired manner values of TFC indicator and the number of repetitions.
  • TFC set size is reduced to 122 values, which are indicated by the first 122 E-TFCI values.
  • the final 6 E-TFCIs indicate bundling, including the amount of repetition. Bundling is permitted in this example for TFCl and TFC2, which are assumed to be the most commonly used TFCs for VoIP signalling.
  • E-TFCI may be based on the fact that information about repetition scheme will be encompassed in E- TFCI.
  • nodeB it may be advantageous for nodeB to distinguish between ordinary and redefined E-TFCI value. This might be achieved by appropriate RNC configuration of the UE and nodeB. Therefore UE may choose E-TFCI value from the not permitted range. This may be a notification for nodeB to identify the repetition scheme.
  • the E-TFCI values need to be redefined beforehand e.g. 4 new E-TFCI values may be defined, which will indicate not only TFC but also number of possible repetitions (e.g. 0, 1, 3, 7) .
  • the E-TFCI re-interpretation method may best be combined with a repetition scheme transmitting E-DPCCH only in the first TTI, since the nodeB may not be aware of the number of repetitions until it has decoded E-DPCCH.
  • Offset detection on E-DPCCH is based on an assumption that UE can signal repetition scheme by changing power relation /3ec//3 c . If the E-DPCCH is transmitted all of the TTIs, the increase of the power offset will signal utilizing the repetition scheme, e.g. ⁇ ec / ⁇ c decreased by x dB means that TTI bundle size may be increased. Likewise lowering of the TTI bundle size might be signalled by increasing ⁇ ec / ⁇ c power relation. It should be noted that it may not necessary to adjust the E-DPCCH power offset for repetition compared to only 1 transmission when E-DPCCH is transmitted in the first TTI only, so there is some power usage for using offset signalling in this case.
  • the offset detection method may best be combined with a repetition scheme in which E- DPCCH is repeated in each TTI.
  • the E-DPCCH power offset may anyhow be reduced according to the number of repetitions.
  • there may be no additional power usage for the signalling as the total power spent over the repeated TTIs on E-DPCCH remains the same.
  • some indication to the nodeB of the relationship between E-DPCCH level and the number of repetitions may be required.
  • UE will signal TTI bundling by changing the power relation ⁇ ec / ⁇ c . This will be a notification for nodeB that TTI bundling is to be applied.
  • the nodeB may detect the amount of repetitions from the E-TFCI value.
  • TTI 501 of 2 ms is schematically depicted corresponding to a slot including control channel DPCCH 502 and data channel E-DPDCH 503.
  • TTI 504 of 10 ms is depicted including also control channel DPCCH 505 and data channel E-DPDCH 506. The switching between these two states is indicated by arrow 507.
  • a method may be provided which increases coverage of an EUL/HSUPA of WCDMA.
  • the coverage may be increased by performing an adapted bundling and/or TTI switching which possibly solves the problems of: how to determine the number of TTI repetitions or TTI length, which entity should take a decision on starting the repetitions and/or TTI switching, how to inform a second network element (NB or UE) about this decision, and how to operate soft handover (SHO) .
  • Fig. 6 schematically illustrates a communication network 600 comprises a plurality of nodeBs 601 and 602 and a plurality of user equipments 604, 605, 606.
  • the nodeB 601 is at one point in time the serving nodeB for the user equipment 604 which is moving so that to another point in time the former non serving nodeB 602 may become the serving nodeB by a soft handover.
  • some or all nodeBs may comprise a decision unit 610 adapted to decide on a change of the information density indicator and may further comprise a receiving unit 611 and a transmission unit 612.
  • the user equipments 604, 605, 606 comprise a transmission unit 613, a receiving unit 614 and a decision unit 615 adapted to decide on a change of the information density indicator.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

L’invention concerne un procédé d’utilisation d’un matériel employé par un utilisateur dans un réseau de communication, le procédé comprenant les étapes consistant à envoyer un indicateur de densité d’informations du matériel employé par un utilisateur à un autre élément du réseau, l’indicateur de densité d’informations étant relatif à une quantité d’informations envoyée durant un intervalle de temps respectif.
PCT/EP2008/063023 2008-09-29 2008-09-29 Procédé d’utilisation d’un matériel employé par un utilisateur et matériel employé par un utilisateur WO2010034354A1 (fr)

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WO2010101808A1 (fr) * 2009-03-02 2010-09-10 Interdigital Patent Holdings, Inc. Procédé et appareil d'extension de couverture pour transmission en liaison montante sur e-dch en mode veille et dans l'état cell_fach
CN102196546A (zh) * 2010-09-30 2011-09-21 重庆重邮信科通信技术有限公司 一种降低td-hsupa终端误码率的上行控制方法
CN102196546B (zh) * 2010-09-30 2012-06-13 重庆重邮信科通信技术有限公司 一种降低td-hsupa终端误码率的上行控制方法
GB2496188B (en) * 2011-11-07 2015-03-25 Broadcom Corp Method, apparatus and computer program for reselecting a different transmission time interval resource
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GB2502014A (en) * 2011-11-07 2013-11-13 Renesas Mobile Corp Reselecting a different transmission time interval resource in a wireless network
US8837311B2 (en) 2011-11-07 2014-09-16 Broadcom Corporation Method and apparatus for reselecting a different transmission time interval resource
CN104919739B (zh) * 2013-01-17 2019-07-19 高通股份有限公司 用于tti(传输时间间隔)绑定中的资源管理的方法和系统
KR20200135582A (ko) * 2013-01-17 2020-12-02 퀄컴 인코포레이티드 개선된 위상 연속성에 대한 ｔｔｉ(ｔｒａｎｓｍｉｓｓｉｏｎ ｔｉｍｅ ｉｎｔｅｒｖａｌ) 번들링에서의 자원 관리를 위한 방법 및 시스템
CN104919739A (zh) * 2013-01-17 2015-09-16 高通股份有限公司 用于改进的相位连续性的tti(传输时间间隔)绑定中的资源管理的方法和系统
KR102266469B1 (ko) 2013-01-17 2021-06-16 퀄컴 인코포레이티드 개선된 위상 연속성에 대한 ｔｔｉ(ｔｒａｎｓｍｉｓｓｉｏｎ ｔｉｍｅ ｉｎｔｅｒｖａｌ) 번들링에서의 자원 관리를 위한 방법 및 시스템
JP2016505227A (ja) * 2013-01-17 2016-02-18 クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ 改善された位相連続性のための、ｔｔｉ（送信時間間隔）バンドリングにおけるリソース管理のための方法およびシステム
US11076403B2 (en) 2013-01-17 2021-07-27 Qualcomm Incorporated Method and system for resource management in TTI (transmission time interval) bundling for improved phase continuity
EP3046375A1 (fr) * 2013-01-17 2016-07-20 Qualcomm Incorporated Méthode et système pour gestion de resources dans un tti-groupage pour ameliorer la continuité de phase.
KR20210073615A (ko) * 2013-01-17 2021-06-18 퀄컴 인코포레이티드 개선된 위상 연속성에 대한 ｔｔｉ(ｔｒａｎｓｍｉｓｓｉｏｎ ｔｉｍｅ ｉｎｔｅｒｖａｌ) 번들링에서의 자원 관리를 위한 방법 및 시스템
EP3860232A1 (fr) * 2013-01-17 2021-08-04 QUALCOMM Incorporated Procédé et système de gestion de ressources dans un groupage tti (intervalle de temps de transmission) pour continuité de phase améliorée
US10420094B2 (en) 2013-01-17 2019-09-17 Qualcomm Incorporated Methods and system for resource management in TTI (transmission time interval) bundling for improved phase continuity
JP2018164260A (ja) * 2013-01-17 2018-10-18 クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ 改善された位相連続性のための、ｔｔｉ（送信時間間隔）バンドリングにおけるリソース管理のための方法およびシステム
WO2014113626A3 (fr) * 2013-01-17 2014-10-16 Qualcomm Incorporated Procédé et système de gestion des ressources dans un groupage tti (intervalles de temps de transmission) pour une continuité de phase améliorée
KR102345486B1 (ko) 2013-01-17 2021-12-29 퀄컴 인코포레이티드 개선된 위상 연속성에 대한 ｔｔｉ(ｔｒａｎｓｍｉｓｓｉｏｎ ｔｉｍｅ ｉｎｔｅｒｖａｌ) 번들링에서의 자원 관리를 위한 방법 및 시스템
CN104221459A (zh) * 2013-04-12 2014-12-17 华为技术有限公司 一种传输间隔tti类型切换方法、设备及系统
JP2019208227A (ja) * 2013-09-13 2019-12-05 クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ カバレッジ拡張を伴うアップリンクチャネル設計
JP2019118129A (ja) * 2013-09-13 2019-07-18 クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ カバレッジ拡張を伴うアップリンクチャネル設計
CN109286974B (zh) * 2013-09-13 2021-11-23 高通股份有限公司 具有覆盖增强的上行链路信道设计
CN109286974A (zh) * 2013-09-13 2019-01-29 高通股份有限公司 具有覆盖增强的上行链路信道设计
JP7005561B2 (ja) 2013-09-13 2022-01-21 クゥアルコム・インコーポレイテッド カバレッジ拡張を伴うアップリンクチャネル設計
JP7171783B2 (ja) 2013-09-13 2022-11-15 クゥアルコム・インコーポレイテッド カバレッジ拡張を伴うアップリンクチャネル設計
JP2021090199A (ja) * 2013-09-13 2021-06-10 クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ カバレッジ拡張を伴うアップリンクチャネル設計
US10187839B2 (en) 2014-05-08 2019-01-22 Huawei Technologies Co., Ltd. Apparatus and method for controlling soft handover rate
WO2015168911A1 (fr) * 2014-05-08 2015-11-12 华为技术有限公司 Appareil et procédé de régulation de la proportion de commutation logicielle
US9722732B2 (en) 2014-09-26 2017-08-01 Alcatel Lucent Method and apparatus for terminating repetition of data packet transmission
WO2016046629A1 (fr) * 2014-09-26 2016-03-31 Alcatel Lucent Procédé et appareil permettant de terminer la répétition d'une transmission de paquets de données
CN108702251A (zh) * 2015-12-22 2018-10-23 索尼移动通讯有限公司 动态覆盖增强
CN108702251B (zh) * 2015-12-22 2021-03-05 索尼移动通讯有限公司 节点、终端和用于动态覆盖增强的方法
US10637616B2 (en) 2015-12-22 2020-04-28 Sony Corporation Dynamic coverage enhancement
WO2017108113A1 (fr) * 2015-12-22 2017-06-29 Sony Mobile Communications Inc. Amélioration de couverture dynamique
CN108781137A (zh) * 2016-03-15 2018-11-09 英特尔Ip公司 增强的报告和上行链路稳健性设计
WO2017160351A1 (fr) * 2016-03-15 2017-09-21 Intel IP Corporation Conception améliorée de robustesse de liaison montante et de rapports
WO2019137939A1 (fr) * 2018-01-11 2019-07-18 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Mécanisme de retransmission de données dans des réseaux terrestres ou non terrestres présentant un retard de propagation élevé

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