WO2012144730A1 - Appareil et procédé de transmission d'informations de commande - Google Patents

Appareil et procédé de transmission d'informations de commande Download PDF

Info

Publication number
WO2012144730A1
WO2012144730A1 PCT/KR2012/001462 KR2012001462W WO2012144730A1 WO 2012144730 A1 WO2012144730 A1 WO 2012144730A1 KR 2012001462 W KR2012001462 W KR 2012001462W WO 2012144730 A1 WO2012144730 A1 WO 2012144730A1
Authority
WO
WIPO (PCT)
Prior art keywords
resource
bit
control information
terminal
pattern
Prior art date
Application number
PCT/KR2012/001462
Other languages
English (en)
Korean (ko)
Inventor
홍성권
Original Assignee
주식회사 팬택
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.)
Filing date
Publication date
Application filed by 주식회사 팬택 filed Critical 주식회사 팬택
Publication of WO2012144730A1 publication Critical patent/WO2012144730A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
    • H04L25/03866—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using scrambling
    • 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
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated

Definitions

  • the present invention relates to communication, and more particularly, to an apparatus and method for transmitting control information, and an apparatus and method for receiving.
  • the base station schedules radio resources to efficiently use the limited radio resources. If there is no data packet transmitted to a radio resource allocated to a user, the base station schedules the radio resource that is not in use so that other users can use it, thereby increasing the efficiency of the radio resource. In this way, the radio resources are allocated to a user who does not have a data packet to transmit and receive, but a radio resource is allocated to a user who has a data packet to transmit and receive, but the radio resources are dynamically allocated at regular intervals in frequency or time. This is called dynamic scheduling.
  • the base station continuously allocates the radio resources allocated to the terminal for a predetermined time without changing the radio resources.
  • This resource allocation method is semi-persistent scheduling (SPS). It is called).
  • SPS semi-persistent scheduling
  • the base station transmits control information indicating that the radial scheduling is activated to the terminal.
  • the terminal may know that the radial scheduling is activated from the control information, and may communicate with the base station based on the radial scheduling. For example, if the ringless scheduling is applied to the terminal, the terminal may transmit or receive data using the previously allocated radio resource even if there is no control information for resource allocation.
  • the terminal fails to receive the control information indicating that the ring scheduling is activated, the terminal cannot operate according to the ring scheduling, and can not successfully recover a signal carried on the radio resource allocated continuously. This can lead to serial performance degradation.
  • An object of the present invention is to provide an apparatus and method for transmitting control information which is robust against errors.
  • Another technical problem of the present invention is to provide an apparatus and method for receiving error-resistant control information.
  • Another technical problem of the present invention is to provide an apparatus and method for lowering the error probability of downlink control information (DCI).
  • DCI downlink control information
  • Another technical problem of the present invention is to provide an apparatus and method for setting a specific bit of an information field for resource allocation in a DCI to a specific value.
  • Another technical problem of the present invention is to provide an apparatus and method for transmitting information indicating that resource allocation is limited.
  • Another technical problem of the present invention is to provide an apparatus and method for generating a DCI indicating activation or release of a ring scheduling.
  • the transmission apparatus may include a resource allocation control unit configured to define a pattern in which a resource block is allocated to the terminal, and generate a resource limit indicator indicating the limitation of the pattern, and the resource allocated to the terminal in the limited pattern.
  • Generate control information including a first bit area indicating a field and a field consisting of a second bit area whose number of bits varies according to the degree to which the pattern is defined, and cyclic redundancy check on the control information.
  • Downlink control information for adding a parity bit (CRC) and scrambling a specific radio network temporary identifier (RNTI) to the added CRC parity bit to output scrambled control information.
  • CRC parity bit
  • RNTI radio network temporary identifier
  • a method of transmitting control information may include: defining a pattern in which a resource block is allocated to a terminal; transmitting a resource limit indicator indicating the limitation of the pattern to the terminal; and indicating a resource allocated to the terminal in the limited pattern.
  • Generating control information comprising a bit area and a field consisting of a second bit area whose number of bits varies according to the extent to which the pattern is defined, adding a CRC parity bit to the control information, Scrambling a specific RNTI in a CRC parity bit, and mapping the scrambled control information to a PDCCH and transmitting it to the terminal.
  • a terminal for receiving control information limits a pattern to which a resource block is allocated to the terminal, receives a resource limit indicator indicating a limitation of the pattern from the base station, and indicates a resource allocated to the terminal in the limited pattern.
  • a receiver a decoder for performing blind decoding for searching the PDCCH, a cyclic redundancy check (CRC) parity bit added to downlink control information obtained by the blind decoding, and the first decoding block.
  • An error detection unit that performs reception error detection on the downlink control information based on a 2-bit area, and the first ratio Using the resources of the value of the instruction region includes transmitting unit for transmitting the uplink data to the base station.
  • the second bit area may be set to a fixed specific value.
  • a method of receiving control information by a terminal may further include: receiving a resource limit indicator from a base station that defines a pattern in which a resource block is allocated to a terminal and indicates a limitation of the pattern, and receives the resource allocated to the terminal in the limited pattern.
  • a physical downlink control channel to which downlink control information is mapped, comprising a field consisting of a first bit region indicated and a second bit region whose number of bits varies according to the degree to which the pattern is limited.
  • CRC cyclic redundancy check
  • FIG. 1 shows a wireless communication system to which the present invention is applied.
  • FIG. 2 shows a structure of a radio frame to which the present invention is applied.
  • 3 is an exemplary diagram showing a resource grid for one downlink slot to which the present invention is applied.
  • FIG. 6 is a flowchart illustrating a method of transmitting control information according to an embodiment of the present invention.
  • FIG. 7 is an exemplary diagram illustrating a second bit area of a resource allocation field according to the present invention.
  • FIG. 8 is a flowchart illustrating a method of transmitting control information by a base station according to an embodiment of the present invention.
  • FIG. 9 is a flowchart illustrating a method of receiving control information by a terminal according to an embodiment of the present invention.
  • FIG. 10 is a block diagram illustrating a base station transmitting control information and a terminal receiving control information according to an embodiment of the present invention.
  • the embodiments proposed herein may be applied to a wired communication network as well as a wireless communication network.
  • Work performed in the communication network may be performed in the process of controlling the network and transmitting data in a system (for example, a base station) that manages the communication network, or may be performed in a terminal coupled to the communication network.
  • 'transmitting a channel' may be interpreted as meaning transmitting information through a specific channel.
  • the channel is a concept including both a control channel and a data channel
  • the control channel may be, for example, a physical downlink control channel (PDCCH) or a physical uplink control channel (PUCCH).
  • the data channel may be, for example, a Physical Downlink Shared CHannel (PDSCH) or a Physical Uplink Shared CHannel (PUSCH).
  • FIG. 1 shows a wireless communication system to which the present invention is applied.
  • the wireless communication system 10 is widely deployed to provide various communication services such as voice and packet data.
  • the wireless communication system 10 includes at least one base station (BS) 11.
  • Each base station 11 provides a communication service for a particular geographic area or frequency area (generally called a cell) 15a, 15b, 15c.
  • the cell can in turn be divided into a number of regions (called sectors).
  • the UE 12 may be fixed or mobile and may have a mobile station (MS), a mobile terminal (MS), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), a wireless device, or a PDA. (personal digital assistant), wireless modem (wireless modem), a handheld device (handheld device) may be called other terms.
  • the base station 11 generally refers to a station that communicates with the terminal 12, and includes an evolved-NodeB (eNB), a base transceiver system (BTS), an access point, an femto eNB, and a home. It may be called other terms such as a base station (Home eNB: HeNB), a relay, and the like.
  • the cell should be interpreted in a comprehensive sense of a part of the area covered by the base station 11 and encompasses various coverage areas such as megacells, macrocells, microcells, picocells and femtocells.
  • downlink refers to a communication or communication path from the base station 11 to the terminal 12
  • uplink refers to a communication or communication path from the terminal 12 to the base station 11.
  • the transmitter may be part of the base station 11 and the receiver may be part of the terminal 12.
  • the transmitter may be part of the terminal 12 and the receiver may be part of the base station 11.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier-FDMA
  • OFDM-FDMA OFDM-FDMA
  • OFDM-TDMA OFDM-FDMA
  • OFDM-TDMA OFDM-
  • FIG. 2 shows a structure of a radio frame to which the present invention is applied.
  • a radio frame includes 10 subframes, and one subframe includes two slots.
  • the time taken for one subframe to be transmitted is called a transmission time interval (TTI).
  • TTI transmission time interval
  • one subframe may have a length of 1 ms
  • one slot may have a length of 0.5 ms.
  • One slot includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols in the time domain and includes a plurality of resource blocks (RBs) in the frequency domain.
  • the OFDM symbol is for representing one symbol period, and may be referred to as an SC-FDMA symbol or a symbol period according to a multiple access scheme.
  • the RB includes a plurality of consecutive subcarriers in one slot in resource allocation units.
  • the structure of the radio frame is only an example, and the number of subframes included in the radio frame or the number of slots included in the subframe and the number of OFDM symbols included in the slot may be variously changed.
  • the preceding two or three OFDM symbols of the first slot in the subframe are used as a control region to which a PDCCH is allocated, and the remaining OFDM symbols are used as a data region to which a PDSCH is allocated.
  • the downlink control channel includes a physical control format indicator channel (PCFICH), a PDCCH, a physical hybrid-ARQ indicator channel (PHICH), and the like.
  • the PCFICH is transmitted in the first OFDM symbol of a subframe and carries information about the number of OFDM symbols (ie, the size of the control region) used for transmission of the PDCCH in the subframe.
  • the PHICH carries an ACK (Acknowledgement) / NACK (Not-Acknowledgement) signal for an uplink HARQ (Hybrid Automatic Repeat Request). That is, the ACK / NACK signal for the uplink data transmitted by the terminal is transmitted on the PHICH.
  • 3 is an exemplary diagram showing a resource grid for one downlink slot to which the present invention is applied.
  • each element on the resource grid is called a resource element (RE), and one resource block (RB) includes 12 ⁇ 7 resource elements.
  • the number N DL of resource blocks included in the downlink slot depends on the downlink transmission bandwidth set in the cell.
  • the bandwidths considered in LTE are 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, and 20 MHz, which are 6, 15, 25, 50, 75, and 100, respectively.
  • At least one resource block corresponding to each band may be bundled to form a resource block group (RBG). For example, two adjacent resource blocks may constitute one resource block group.
  • the total number of resource blocks for each bandwidth and the number of resource blocks constituting one resource block group may be given as shown in Table 1.
  • Table 1 Bandwidth Total number of resource blocks The number of resource blocks belonging to one resource block group Total number of resource block groups 1.4 MHz 6 One 6 3 MHz 15 2 8 5 MHz 25 2 13 10 MHz 50 3 17 15 MHz 75 4 19 20 MHz 100 4 25
  • the total number of available resource blocks varies according to a given bandwidth.
  • the difference in the total number of resource blocks means that the size of information indicating resource allocation is different.
  • the number of cases in which resource blocks are allocated may vary depending on the resource allocation method.
  • a resource block may be allocated using a bitmap format (type 0).
  • resource blocks may be allocated at predetermined intervals or periods on the frequency axis (type 1).
  • a resource block may be allocated as a region defined by contiguous resource blocks on a frequency axis (type 2).
  • the resource block allocated to the terminal is indicated by the resource allocation field, and the bit request amount of the resource allocation field varies according to each type of resource allocation scheme and the total number of resource blocks for each bandwidth.
  • the type 0 resource allocation method is a method of allocating the entire resource blocks of the system to the UE in units of clusters grouped into at least one consecutive resource block. At least one resource block is spaced between clusters. This is also known as non-contiguous resource allocation. If there is only one cluster, this is called Contiguous Resource Allocation, and Type 0 includes this case. Downlink type 2 only considers continuous resource allocation.
  • a total of four clusters are allocated to the terminal.
  • the first cluster includes one resource block
  • the second cluster includes three resource blocks
  • the third cluster includes two resource blocks
  • the fourth cluster includes one resource block.
  • Type 0, type 1, and type 2 correspond to downlink resource allocation, and different configurations may be made for uplink resource allocation.
  • Uplink resource allocation may be classified into type 0 and type 1 for uplink.
  • the uplink type 0 may use the same method as the downlink type 2.
  • the uplink type 1 is an enumerated source encoding scheme, and an example of using a limited cluster and using only two clusters may be an example. Restricted non-contiguous resource allocation using enumerated source coding is described further below.
  • the type 0 allocation scheme can represent the maximum possible clusters in a given bitmap representation.
  • the number of clusters less than or equal to the maximum possible cluster in bitmap form is considered.
  • each resource block may be represented by a bitmap.
  • Each bit is mapped to each resource block. For example, if the bit is 0, the corresponding resource block is allocated to the terminal. If the bit is 1, the corresponding resource block is not allocated to the terminal.
  • FIG. 4 illustrates a case where the bitmap is 010011100110100.
  • the required amount of bits is required for the number of resource blocks. In other words, the required amount of bits is, when the number of resource blocks is n, ceiling ( )
  • ceiling (x) means the minimum integer greater than or equal to x.
  • 5 is another example of a resource allocation method to which the present invention is applied. This is a type 2 resource allocation method.
  • the base station may allocate a cluster consisting of at least one consecutive resource block to the terminal.
  • One cluster is represented by an offset and a length at the start of all RBs.
  • the cluster of FIG. 5 includes 10 resource blocks consecutive from the third resource block.
  • Type 2 represents continuous resource allocation
  • Type 0 and Type 1 represent discrete resource allocation. Therefore, when the number of resource blocks is large, the number of bits of the resource allocation field required for representing the resource allocation of type 2 is smaller than that of type 0 or type 1.
  • n resource blocks are allocated by Type 2, the number of cases of all resource allocation is determined by Equation 1.
  • DCI format 0 may be used as separator bits.
  • the surplus bits are due to DCI format 0 having the same PDCCH size as DCI format 1A.
  • DCI format 0 and DCI format 1A are designed to have the same size, and considering the use of the internal fields of DCI format 0 and DCI format 1A respectively, DCI format 1A requires more than one bit more than DCI format 0. In DCI format 0, there are always 1 or more surplus bits left.
  • DCI format 0 and DCI format 1A are treated as the same decoding process, and are blindly decoded assuming a certain size for each band.
  • the DCI format 0 or DCI format 1A is distinguished through a division bit (a division bit for distinguishing DCI format 1A and DCI format 1A) in the PDCCH after a certain size is confirmed.
  • PDCCH includes resource allocation and transmission format of downlink shared channel (DL-SCH), resource allocation information of uplink shared channel (UL-SCH), resource allocation of upper layer control message such as random access response transmitted on PDSCH, It may carry a set of transmit power control commands for individual UEs in a UE group, activation / release of semi-persistent scheduling (SPS), and the like.
  • a plurality of PDCCHs may be transmitted in the control region, and the terminal may monitor the plurality of PDCCHs.
  • the PDCCH is transmitted on an aggregation of one or several consecutive control channel elements (CCEs).
  • CCEs control channel elements
  • CCE is a logical allocation unit used to provide a PDCCH with a coding rate according to a state of a radio channel.
  • the CCE corresponds to a plurality of resource element groups.
  • the format of the PDCCH and the number of bits of the PDCCH are determined according to the correlation between the number of CCEs and the coding rate provided by the CCEs.
  • DCI downlink control information
  • DCI format 0 indicates uplink resource allocation information
  • DCI formats 1 to 2 indicate downlink resource allocation information
  • DCI formats 3 and 3A indicate uplink TPC (transmit) for arbitrary UE groups. power control) command.
  • Each field of the DCI is sequentially mapped to n information bits a 0 to a n-1 . For example, if DCI is mapped to information bits of a total of 44 bits in length, each DCI field is sequentially mapped to a 0 to a n-1 .
  • DCI formats 0, 1A, 3, and 3A may all have the same payload size.
  • DCI includes uplink resource allocation information and downlink resource allocation information.
  • the uplink resource allocation information may be referred to as an uplink grant, and the downlink resource allocation information may be referred to as a downlink grant.
  • Table 3 shows DCI of format 0 which is uplink resource allocation information (or uplink grant).
  • a flag is an indicator for distinguishing DCI 0 from DCI 1A as 1-bit information.
  • the hopping flag is 1-bit information and indicates whether frequency hopping is applied or not when the terminal performs uplink transmission. For example, if the hopping flag is 1, frequency hopping is applied during uplink transmission, and if hopping flag is 0, frequency hopping is not applied during uplink transmission.
  • FIG. 6 is a flowchart illustrating a method of transmitting control information robust to an error according to an embodiment of the present invention.
  • the base station sets a restriction on resource allocation (S700).
  • Restriction of resource allocation may mean limiting a pattern of resource blocks allocated to the terminal.
  • limiting resource allocation may mean reducing the degree of freedom to which resource blocks are allocated.
  • limiting resource allocation may mean reducing the number of resource blocks allocated to the terminal.
  • limiting resource allocation may mean increasing the number of resource blocks included in the resource block group.
  • Restriction of resource allocation may be set in a communication environment in which a large number of terminals exist while mainly requiring less resources (or bandwidth), such as a voice call. In this case, the cluster length does not have to be large in consecutive resource allocation.
  • the base station may set the maximum length of the cluster not to exceed k.
  • k ⁇ N RB .
  • N RB is the maximum number of resource blocks allocable to the terminal according to the system bandwidth.
  • the base station may set the maximum length of the cluster not to exceed N RB / 2.
  • DCI supported with continuous resource allocation may be Format 0 or Format 1A.
  • a cluster consisting of at least one resource block is allocated to the terminal.
  • One cluster may be represented by an offset and a length, and the offset and the length may have a variable value.
  • the number of all cases of clusters that can be represented by various offsets and lengths can be obtained by Equation 1 above.
  • the number of all cases of the cluster that can be represented becomes 5050 according to Equation 1.
  • each of the 100 resource blocks becomes one cluster.
  • each cluster may be specified by the size of the offset. That is, the number of all cases of the cluster that can be represented is 100.
  • the index has a value from 0 to 99. 100 indexes may be represented by 7 bits.
  • the base station limits the length of the cluster to 2
  • the number of all cases of the cluster that can be represented is 199, which is 0 to 198.
  • These indices can be represented by 8 bits.
  • the base station may limit the maximum number of clusters not to exceed m. For example, when 100 resource blocks are allocated in units of 25 resource block groups (RBGs) in a 20 MHz band, a 25-bit resource allocation field is required. At this time, up to 13 clusters may be allocated. If the maximum number of assignable clusters is reduced to six, the number of bits required is 23 in total as shown in Equation 3 below.
  • RBGs resource block groups
  • a discontinuous resource allocation algorithm using uplink enumerated source coding may be applied to express resource allocation by type 0.
  • the base station transmits a resource restriction indicator (RRI) for setting the resource allocation to the terminal (S705).
  • the resource limit indicator may be a physical layer signal or a medium access control (MAC) message or a radio resource control (RRC) message transmitted on the PDCCH.
  • the resource limit indicator may indicate the maximum length of the cluster.
  • the resource limit indicator may simply be information indicating that the length of the cluster is limited or not limited. In this case, the terminal may recognize that the maximum length of the cluster is limited to a predetermined length or less according to a predefined restriction configuration.
  • the resource limit indicator may be information indicating that the number of resource blocks or the number of resource block groups is limited.
  • the resource limit indicator may be information indicating that the maximum number of clusters is limited.
  • the procedure of steps S700 and S705 may be omitted.
  • the base station divides the resource allocation field into a first bit region and a second bit region, sets the first bit region to an index value of a specific resource allocation, and sets the second bit region of the resource allocation field to a specific value irrelevant to resource allocation.
  • CRC cyclic redundancy check
  • the number of bits in the second bit area may vary depending on the degree of limitation of resource allocation.
  • the index is 199 in total and can be represented by 8 bits.
  • the base station sets 8 bits including the least significant bit (LSB) as the first bit region, and sets the bit region including the most significant bit (MSB) exceeding the 8 bits to the second bit region. Can be separated.
  • the resource allocation field is 13 bits, 8 bits are the first bit area and the remaining 5 bits are the second bit area.
  • the first bit region may include the MSB and the second bit region may include the LSB.
  • the first bit region and the second bit region may occupy a predetermined bit permutation.
  • the information bits of the resource allocation field are a 0 , a 1 , ..., a 12 .
  • a 0 is MSB and a 12 is LSB.
  • the first bit area may be a 5 , a 6 ,..., A 12
  • the second bit area may be a 0 , a 1 , ..., a 4 .
  • the first bit region is a 1 , a 3 , a 5 , a 7 , a 9 , a 10 , a 11 , a 12
  • the second bit region is a 0 , a 2 , a 4 , a 6 , a can be 8 .
  • All bits of the second bit area may be predefined or fixed to the same value, for example, 0 or 1.
  • the second bit area may be preconfigured as '00000' or '11111'.
  • the second bit area may be preset to a specific value, for example, '10101'.
  • the specific value preset in the second bit area may be pre-defined between the terminal and the base station. That is, when the terminal receives the resource limit indicator, it is possible to know what value the second bit area is set in advance.
  • the base station attaches the CRC parity bit obtained from the DCI including the resource allocation field divided into the first bit region and the second bit region to the DCI (S715).
  • the CRC parity bit is calculated by substituting the information bits constituting the DCI into cyclic generator polynomials.
  • the specific value preset in the second bit area is reflected in the calculation of the CRC parity bit.
  • the base station adds the CRC parity bit to the DCI such that the MSB of the CRC parity bit is located after the LSB of the DCI.
  • the addition of the CRC parity bit may be added before the MSB and may be added before the LSB or after the MSB as defined by LSB, MSB.
  • the base station scrambling a specific radio network temporary identifier (RNTI) to the CRC parity bit (S720), maps the DCI to which the specific RNTI adds the scrambled CRC parity bit to the PDCCH, and maps the PDCCH to the terminal. Transfer to (S725).
  • scrambling may be referred to as masking.
  • blind decoding defines a decoding start point in a region of a given PDCCH, performs decoding on all possible DCI formats in a given transmission mode, and decodes a user from specific RNTI information scrambled with CRC parity bits. That's the way.
  • blind decoding includes performing a XOR operation on a specific RNTI in the CRC parity bit of the DCI received by the UE.
  • the UE acquires the DCI and the CRC parity bits, and performs error detection of the DCI based on the CRC parity bits and the second bit region (S735). For example, assume that a specific value preset in the second bit area is '00000'. However, due to the deterioration of the channel state, the value of the second bit area actually received by the terminal may be different from the preset specific value. However, since the CRC parity bit is calculated by reflecting a specific value preset in the second bit region, the terminal adjusts the value of the second bit region to '00000' regardless of the value of the second bit region actually received. In addition, error detection of DCI is performed.
  • the second bit area is in an integrity state, and the probability of error detection of the DCI depends on whether or not an error occurs in the remaining field parts except the second bit area. That is, the probability of error detection of the DCI may be lowered by the size of the second bit region. The larger the size of the second bit region, the lower the probability of error detection of the DCI.
  • the terminal interprets the meaning of the value of the first bit region according to the resource allocation type, and transmits uplink data to the base station using the resource indicated by the value of the first bit region, or downlink data Receive from the base station (S740).
  • the second bit area of the resource allocation field as a virtual CRC.
  • this is only an example and a part of other fields included in the DCI may be used as the virtual CRC.
  • the MSB of the MCS field may be adopted as the second bit region.
  • the MSB of the MCS field may be set to a specific value (for example, 0) to facilitate error detection.
  • the resource allocation is limited to the extent that it does not cause performance degradation.
  • the remaining control information can then be used for error detection of the DCI. This improves the error detection performance of the DCI and lowers the probability of error detection of the actual DCI.
  • the UE may continuously use resources allocated by one PDCCH transmission without transmitting additional PDCCHs. That is, scheduling through one activation signaling continues until release signaling.
  • the activation and release signaling of the SPS is performed in the form of PDCCH, which is arranged as follows.
  • the CRC parity bit is scrambled with the SPS C-RNTI.
  • the SPS C-RNTI is information for identifying a terminal scheduled for a certain period of time by constant control information (including resource allocation) by the SPS. Scrambling means that an XOR operation is performed between the CRC parity bit and the SPS C-RNTI.
  • the New Data Indicator (NDI) bit is set to 0 for DCI format 2 / 2A / 2B.
  • the UE cannot recognize the scheduled resources in a ring. This is because the PDCCH is not continuously transmitted. Nevertheless, if unscheduled scheduled resources are continuously allocated to the terminal, it may cause a waste of radio resources. In addition, when the error detection performance using the CRC parity bit is not sufficient, a case of misunderstanding the PDCCH for SPS activation / release of the other terminal as its own.
  • the method for transmitting control information according to FIG. 6 may be applied to an SPS.
  • the base station may limit resource allocation as shown in S700 and may set a DCI for activating the SPS based on S710. That is, the base station may set the DCI for activating the SPS by setting some fields of the DCI to a specific value.
  • the DCI for activating the SPS is set differently depending on the format. This is illustrated in the following table.
  • a value of a specific field is set to a specific value according to the DCI format.
  • DCI format 1 the 2-bit field for the TPC command is set to '00', and the 3-bit field for the cyclic shift DM RS is set to '000', and the modulation and coding scheme and iteration version (Modulation and coding).
  • the MSB is set to zero in a 5-bit field for scheme and redundancy version.
  • the second bit area is set to a constant value, for example, zero. This is illustrated as an example in FIG. 7.
  • one example of the second bit area may be some bits (eg, five as shown in FIG. 7) of the MSB.
  • Another example of the second bit region may be some bits of the LSB.
  • Another example of the second bit region may be bits of a random position.
  • the MSB part may not be set to 0 in the 5-bit field for the modulation and coding scheme and the repetitive version, and QAM modulation may be used.
  • the UE may recognize that the received DCI is a DCI for activating the SPS. Accordingly, the terminal activates the SPS and performs error detection of the DCI using the second bit region.
  • the DCI for releasing the SPS is also set differently depending on the format. This is illustrated in the following table.
  • the value of a specific field is set to a specific value according to the DCI format.
  • DCI format 1 the 2-bit field for the TPC command is set to '00', and the 3-bit field for the cyclic shift DM RS is set to '000', and the modulation and coding scheme and iteration version (Modulation and coding).
  • the 5-bit fields for the scheme and redundancy version are all set to one.
  • the resource allocation fields for resource block assignment and hopping resource allocation are also set to one. That is, both the first bit area and the second bit area of the resource allocation field are set to one. The same applies to the resource block assignment of DCI format 1.
  • the UE may recognize that the received DCI is a DCI for releasing the SPS. Accordingly, the terminal releases the activated SPS and performs error detection of the DCI using the second bit region.
  • FIG. 8 is a flowchart illustrating a method of transmitting control information robust to an error by a base station according to an embodiment of the present invention.
  • the base station sets a limit of resource allocation (S900). Restriction of resource allocation may mean that the pattern of resource blocks allocated to the terminal is limited. Alternatively, limiting resource allocation may mean reducing the degree of freedom to which resource blocks are allocated. Alternatively, limiting resource allocation may mean reducing the number of resource blocks allocated to the terminal. Alternatively, limiting resource allocation may mean increasing the number of resource blocks included in the resource block group. Restriction of resource allocation may be set in a communication environment in which a large number of terminals exist while mainly requiring less resources (or bandwidth), such as a voice call. In this case, the cluster length does not have to be large in consecutive resource allocation.
  • the base station may set the maximum length of the cluster not to exceed k.
  • the base station may limit the maximum number of clusters not to exceed m.
  • type 0 and type 1 may be limited to using only type 0.
  • a division bit for dividing type 0 and type 1 may be used as a bit for error detection of DCI.
  • the base station transmits a resource limit indicator for setting the resource allocation limit to the terminal (S905).
  • the resource limit indicator may be a physical layer signal or a MAC message or an RRC message transmitted on the PDCCH.
  • the resource limit indicator may indicate the maximum length of the cluster.
  • the resource limit indicator may simply be information indicating that the length of the cluster is limited or not limited. In this case, the terminal may recognize that the maximum length of the cluster is limited to a predetermined length or less according to a predefined limitation.
  • the resource limit indicator may be information indicating that the number of resource blocks or the number of resource block groups is limited.
  • the resource limit indicator may be information indicating that the maximum number of clusters is limited. If the length of the cluster is basically limited to a predetermined length by a communication protocol, the procedure of steps S900 and S905 may be omitted.
  • the base station divides the resource allocation field into a first bit region and a second bit region, sets the first bit region to an index value of a specific resource allocation, and sets the second bit region of the resource allocation field to a specific value irrelevant to resource allocation.
  • All bits of the second bit region may be predefined or fixed to the same value, for example, 0 or 1.
  • the second bit area may be preset to '00000' or '11111'.
  • the second bit area may be preset to a specific value, for example, '10101'.
  • the specific value preset in the second bit area may be pre-defined between the terminal and the base station. That is, when the terminal receives the resource limit indicator, it is possible to know what value the second bit area is set in advance.
  • the first bit area is set to an index value of a specific resource allocation.
  • a limited number of clusters that are discontinuously allocated may be represented by an enumeration source coding scheme.
  • the enumerated source encoding method has the advantage of reducing complexity and ensuring implementation stability in terms of the extension of the implemented system.
  • ego Means x C y .
  • resource blocks have an indexing form of 1 to N (N UL RB is the number of uplink resource blocks)
  • N UL RB is the number of uplink resource blocks
  • the starting value of each cluster uses the index value of the resource block as it is, and the ending value of each cluster is the resource block.
  • the code is specified in the form of an index value of +1 and encoded in an enumerated source form.
  • the base station adds the CRC parity bit obtained from the DCI including the resource allocation field divided into the first bit region and the second bit region to the DCI (S915).
  • the CRC parity bit is calculated by substituting the cyclically generated polynomial of the information bits constituting the DCI.
  • the specific value preset in the second bit area is reflected in the calculation of the CRC parity bit.
  • the base station adds the CRC parity bit to the DCI such that the MSB of the CRC parity bit is located after the LSB of the DCI.
  • the DCI including the resource allocation field may be as shown in Table 4 or Table 5.
  • the base station scrambles the specific RNTI to the CRC parity bit (S920), maps the DCI to which the specific RNTI is added the scrambled CRC parity bit to the PDCCH, and transmits the mapped PDCCH to the terminal (S925).
  • scrambling may be called masking.
  • the base station transmits and receives data to and from the terminal using an uplink resource or a downlink resource designated by the first bit region (S930).
  • FIG. 9 is a flowchart illustrating a method of receiving control information robust to an error by a terminal according to an embodiment of the present invention.
  • the terminal receives a resource allocation indicator from the base station (S1000).
  • the resource limit indicator may be a physical layer signal or a MAC message or an RRC message transmitted on the PDCCH.
  • the resource limit indicator may indicate the maximum length of the cluster.
  • the resource limit indicator may simply be information indicating that the length of the cluster is limited or not limited. In this case, the terminal may recognize that the maximum length of the cluster is limited to a predetermined length or less according to a predefined limitation.
  • the resource limit indicator may be information indicating that the number of resource blocks or the number of resource block groups is limited.
  • the resource limit indicator may be information indicating that the maximum number of clusters is limited. If the length of the cluster is basically limited to a predetermined length by a communication protocol, the step S1000 may be omitted.
  • the terminal receives the PDCCH including the DCI from the base station (S1005).
  • the DCI may include a resource allocation field, and the resource allocation field may include a first bit area and a second bit area.
  • the DCI including the resource allocation field may be as shown in Table 4 or Table 5.
  • the UE Upon receiving the PDCCH, the UE performs blind decoding on the PDCCH using a specific RNTI (S1010). For example, when the PDCCH is a PDCCH for activating or releasing the SPS, the UE may succeed in blind decoding by descrambling (or XORing) the SPS C-RNTI in the CRC parity bit. In this case, the terminal may acquire the DCI, and may recognize the activation or release of the SPS from the field information of the acquired DCI.
  • the terminal acquires the DCI and the CRC parity bits by blind decoding, and performs error detection of the DCI based on the CRC parity bits and the second bit region (S1015). For example, assume that a specific value preset in the second bit area is '00000'. However, due to the deterioration of the channel state, the value of the second bit area actually received by the terminal may be different from the preset specific value. However, since the CRC parity bit is calculated by reflecting a specific value preset in the second bit region, the terminal adjusts the value of the second bit region to '00000' regardless of the value of the second bit region actually received. In addition, error detection of DCI is performed.
  • the second bit area is in an integrity state, and the probability of error detection of the DCI depends on whether or not an error occurs in the remaining field parts except the second bit area. That is, the probability of error detection of the DCI may be lowered by the size of the second bit region. The larger the size of the second bit region, the lower the probability of error detection of the DCI.
  • the terminal interprets the meaning of the value of the first bit area according to the resource allocation type. For example, in the case of type 0, the first bit region may be encoded by an enumeration source encoding scheme. Accordingly, the terminal may perform enumeration source decoding using the following algorithm.
  • the terminal transmits uplink data to the base station using the resources indicated by the value of the first bit region or receives downlink data from the base station (S1020).
  • FIG. 10 is a block diagram illustrating a base station transmitting control information robust to errors and a terminal receiving control information robust to errors according to an embodiment of the present invention.
  • the terminal 1100 includes a receiver 1105, a decoder 1110, an error detector 1115, and a transmitter 1120.
  • the receiver 1105 receives the resource limit indicator, the PDCCH or data from the base station 1150.
  • PDCCH is a channel carrying DCI.
  • the DCI may have various formats as shown in Table 2, and may include various information fields as shown in Table 3.
  • the DCI includes a resource allocation field, and when the base station 1150 sets resource limitation, the resource allocation field may be divided into a first bit area and a second bit area.
  • the first bit area indicates a resource allocated to the terminal 1100, and the second bit area is set to a specific value, for example, '0 ... 0' to increase the error detection performance of the DCI.
  • the receiver 1105 transmits data from the base station 1150 using downlink resources indicated by the value of the first bit region.
  • the decoding unit 1110 performs blind decoding to search for a PDCCH for the terminal 1100.
  • the decoding unit 1110 includes a process of descrambling or XORing a specific RNTI to the CRC parity bit of the DCI received by the terminal 1100.
  • the specific RNTI includes the SPS C-RNTI.
  • the error detector 1115 obtains DCI and CRC parity bits by blind decoding on the PDCCH, and performs error detection of DCI based on the CRC parity bits and the second bit region. For example, assume that the second bit area is 5 bits and the preset specific value is '00000'. However, due to the deterioration of the channel state, the value of the second bit area actually received by the terminal 1100 may be different from the preset specific value. However, since the CRC parity bit is calculated by reflecting a specific value preset in the second bit area, the error detector 1115 may set the value of the second bit area to '00000' regardless of the value of the second bit area. After adjusting, the error detection of DCI is performed.
  • the second bit region is in an integrity state, and the probability of detecting the DCI depends on whether or not an error occurs in the remaining field parts except the second bit region. That is, the probability of error detection of the DCI may be lowered by the size of the second bit region. The larger the size of the second bit region, the higher the probability of error detection of the DCI. In addition, even if the terminal 1100 is a PDCCH for another terminal, the probability of error detection for detecting a case in which blind decoding is succeeded by error may be increased.
  • the error detector 1115 interprets the meaning of the value of the first bit area according to the resource allocation type. For example, if the resource allocation type is type 0, the error detection unit 1115 decodes the first bit area by the enumeration source decoding method as shown in Equation 4 to recognize the allocated resource.
  • the transmitter 1120 transmits uplink data to the base station using the resource indicated by the value of the first bit region.
  • the base station 1150 includes a resource allocation control unit 1155, a DCI generation unit 1160, a transmission unit 1165, and a reception unit 1170.
  • the resource allocation control unit 1155 defines an uplink resource or a downlink resource itself for the terminal 1100, or defines an allocated pattern.
  • the resource allocation control unit 1155 may set a limit of resource allocation in a communication environment in which a large number of terminals exist while requiring a small resource (or bandwidth), such as a voice call.
  • the resource allocation controller 1155 may reduce a pattern of resource blocks allocated to the terminal 1100. For example, in a resource allocation such as type 2, the resource allocation control unit 1155 may set the maximum length of the cluster not to exceed k.
  • the resource allocation controller 1155 may reduce the number of resource blocks allocated to the terminal 1100. For example, in a resource allocation such as type 0, the resource allocation control unit 1155 may limit the maximum number of clusters not to exceed m.
  • the resource allocation control unit 1155 may reduce the degree of freedom in which the resource block is allocated. As another example, the resource allocation control unit 1155 may increase the number of resource blocks included in the resource block group.
  • the resource allocation control unit 1155 may generate a separate resource limit indicator when setting the resource allocation.
  • the resource limit indicator may be a physical layer signal or a MAC message or an RRC message transmitted on the PDCCH.
  • the resource limit indicator may indicate the maximum length of the cluster.
  • the resource limit indicator may simply be information indicating that the length of the cluster is limited or not limited.
  • the resource limit indicator may be information indicating that the maximum number of clusters is limited.
  • the DCI generation unit 1160 generates a DCI for the terminal 1100. At this time, the DCI generation unit 1160 divides the resource allocation field of the DCI into a first bit region and a second bit region, sets the first bit region as an index value of a specific resource allocation, and sets the second bit of the resource allocation field. Set the zone to a specific value independent of resource allocation. Alternatively, the first bit area may not exist. In this case, the resource allocation field may consist of only the second bit area. This may be applied to the case of DCI releasing SPS as shown in Table 5 above.
  • the DCI generator 1160 may predefine or fix all bits of the second bit area to the same value, for example, 0 or 1. For example, when the second bit area is 5 bits, the DCI generation unit 1160 may preset the second bit area to '00000' or '11111'. Alternatively, the DCI generator 1160 may preset the second bit area to a specific value, for example, '10101'. The specific value preset in the second bit area may be pre-defined between the terminal 1100 and the base station 1150.
  • the DCI generation unit 1160 may set the first bit area as an index value of a specific resource allocation.
  • the DCI generation unit 1160 may express a limited number of clusters that are discontinuously allocated in an enumerated source encoding scheme.
  • the DCI generation unit 1160 may calculate the following values for M clusters (1 ⁇ sk ⁇ N and sk ⁇ sk + 1) arranged in ascending order.
  • the DCI generation unit 1160 writes the start value of each cluster as an index value of the resource block,
  • the end value of the cluster represents the type 0 resource allocation by writing the index value of the resource block + 1.
  • the DCI generation unit 1160 adds the CRC parity bit obtained from the DCI including the resource allocation field divided into the first bit region and the second bit region to the DCI.
  • the DCI generator 1160 calculates CRC parity bits by substituting information bits constituting the DCI into a cyclically generated polynomial.
  • the DCI generation unit 1160 reflects a specific value preset in the second bit area in the calculation of the CRC parity bit.
  • the DCI generation unit 1160 adds the CRC parity bit to the DCI such that the MSB of the CRC parity bit is located after the LSB of the DCI.
  • the DCI including the resource allocation field may be as shown in Table 4 or Table 5.
  • the DCI generation unit 1160 scrambles the specific RNTI to the CRC parity bit, and maps the DCI to which the specific RNTI is added the scrambled CRC parity bit to the PDCCH.
  • the transmitter 1165 transmits the PDCCH to which the DCI is mapped to the terminal 1100.
  • the transmission unit 1165 transmits the resource limit indicator generated by the resource allocation control unit 1155 to the terminal 1100.
  • the transmitter 1165 transmits downlink data to the terminal 1100 using a resource indicated by the value of the first bit region.
  • the receiver 1170 receives data from the terminal 1100 using an uplink resource designated by the first bit area.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention porte sur un appareil et un procédé de transmission d'informations de commande. La présente invention spécifie : une unité de commande d'attribution de ressource qui définit un motif attribué à un terminal par un bloc de ressource, et génère un indicateur de définition de ressource ; une unité de génération d'informations de commande de liaison descendante qui génère des informations de commande, comprenant un champ comprenant une première zone de bits indiquant une ressource attribuée au terminal dans le motif défini et une seconde zone de bits dans laquelle le nombre de bits est modifié en fonction du degré par lequel le motif est défini, ajoute un bit de parité CRC aux informations de commande et embrouille un identificateur temporaire d'un certain réseau sans fil au bit de parité CRC ajouté de manière à délivrer des informations de commande embrouillées ; et une unité de transmission qui mappe les informations de commande embrouillées à un PDCCH, et transmet le PDCCH ou l'indicateur de définition de ressource au terminal.
PCT/KR2012/001462 2011-04-20 2012-02-27 Appareil et procédé de transmission d'informations de commande WO2012144730A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020110036974A KR20120119174A (ko) 2011-04-20 2011-04-20 제어정보의 전송장치 및 방법
KR10-2011-0036974 2011-04-20

Publications (1)

Publication Number Publication Date
WO2012144730A1 true WO2012144730A1 (fr) 2012-10-26

Family

ID=47041795

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2012/001462 WO2012144730A1 (fr) 2011-04-20 2012-02-27 Appareil et procédé de transmission d'informations de commande

Country Status (2)

Country Link
KR (1) KR20120119174A (fr)
WO (1) WO2012144730A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111052646A (zh) * 2018-05-11 2020-04-21 Lg电子株式会社 在无线通信系统中执行上行链路传输的方法及其设备
CN111886844A (zh) * 2018-02-09 2020-11-03 捷开通讯(深圳)有限公司 控制信息传输

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101318144B1 (ko) * 2012-07-20 2013-10-15 주식회사 이노와이어리스 Ｌｔｅ 시스템에서 하향링크 제어정보 검출 방법
US10034280B2 (en) 2013-10-22 2018-07-24 Lg Electronics Inc. Method and apparatus for transmitting physical downlink control channel in wireless access system supporting machine-type communication
US20210400687A1 (en) * 2018-09-28 2021-12-23 Samsung Electronics Co., Ltd. Method and device for transmitting control information for distinguishing user in wireless communication system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090033126A (ko) * 2007-09-28 2009-04-01 엘지전자 주식회사 무선 통신 시스템에서 제어정보 검출 방법
KR20090104188A (ko) * 2008-03-31 2009-10-06 엘지전자 주식회사 갱신된 시스템 정보의 전송방법
KR20100039203A (ko) * 2008-10-07 2010-04-15 엘지전자 주식회사 다중 반송파 시스템에서의 제어정보의 전송방법

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090033126A (ko) * 2007-09-28 2009-04-01 엘지전자 주식회사 무선 통신 시스템에서 제어정보 검출 방법
KR20090104188A (ko) * 2008-03-31 2009-10-06 엘지전자 주식회사 갱신된 시스템 정보의 전송방법
KR20100039203A (ko) * 2008-10-07 2010-04-15 엘지전자 주식회사 다중 반송파 시스템에서의 제어정보의 전송방법

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111886844A (zh) * 2018-02-09 2020-11-03 捷开通讯(深圳)有限公司 控制信息传输
CN111886844B (zh) * 2018-02-09 2023-04-04 捷开通讯(深圳)有限公司 传输数据的方法和用户设备
CN111052646A (zh) * 2018-05-11 2020-04-21 Lg电子株式会社 在无线通信系统中执行上行链路传输的方法及其设备
US11438885B2 (en) 2018-05-11 2022-09-06 Lg Electronics Inc. Method for performing uplink transmission in a wireless communication system and apparatus therefor
CN111052646B (zh) * 2018-05-11 2022-10-11 Lg电子株式会社 在无线通信系统中执行上行链路传输的方法及其设备

Also Published As

Publication number Publication date
KR20120119174A (ko) 2012-10-30

Similar Documents

Publication Publication Date Title
WO2012177073A2 (fr) Procédé de transmission d'informations de commande de liaison montante, équipement utilisateur, procédé de réception d'informations de commande de liaison montante, et station de base
WO2019216729A1 (fr) Procédé de multiplexage d'informations de commande de liaison montante dans un système de communication sans fil et appareil utilisant ledit procédé
WO2010013970A2 (fr) Procédé et appareil pour la transmission de données dans un système à porteuses multiples
WO2011037439A2 (fr) Extension de canaux physiques de commande de liaison descendante
WO2013032202A2 (fr) Procédé et équipement utilisateur pour recevoir des signaux de liaison descendante, et procédé et station de base pour transmettre des signaux de liaison descendante
WO2014038813A1 (fr) Adaptation d'un nombre de niveaux d'agrégation pour des éléments de canal de contrôle
WO2017116120A1 (fr) Procédé et appareil de transmission d'un accusé de réception (ack)/accusé de réception négatif (nack) par un équipement d'utilisateur nb-iot dans un système de communications sans fil
WO2013025086A2 (fr) Procédé pour l'affectation d'un canal de commande et appareil à cet effet
WO2016144140A1 (fr) Transmissions de canaux de commande de liaison descendante destinés à des ue de faible coût
WO2012150823A2 (fr) Procédé de réception d'un signal de liaison descendante, dispositif utilisateur, procédé d'émission d'un signal de liaison descendante, et station de base associée
WO2012150822A2 (fr) Procédé de réception d'un signal de liaison descendante, dispositif utilisateur, procédé d'émission d'un signal de liaison descendante, et station de base associée
WO2015170933A1 (fr) Procédé d'ordonnancement et appareil pour la communication d2d
WO2010082766A2 (fr) Appareil sans fil pour un système à porteuses multiples
WO2013012190A2 (fr) Procédé et appareil permettant de limiter une sous-trame en liaison descendante dans un mode tdd
WO2011068358A2 (fr) Procédé et appareil d'émission-réception de données via un canal de données de liaison montante physique sur la base de collisions
WO2013112017A1 (fr) Procédé et appareil de programmation de communication pour dispositifs faible capacité
WO2011142608A9 (fr) Procédé pour transmettre un srs à déclenchement de srs dans un système de communication sans fil
WO2013105832A1 (fr) Procédé de réception d'un signal de commande de liaison descendante, installation d'abonné, procédé d'émission d'un signal de commande de liaison descendante et station de base
WO2010044564A2 (fr) Procédé permettant d'effectuer une demande de retransmission automatique hybride (harq) dans un système à porteuses multiples
WO2010123331A2 (fr) Procédé et appareil pour transmettre et recevoir un signal de commande pour fusionner des porteuses lors d'une transmission
WO2012169753A2 (fr) Procédé de transmission de données de contrôle sur la liaison montante et équipement d'utilisateur, et procédé de réception de données de contrôle sur la liaison montante et station de base
WO2011013968A2 (fr) Procédé et appareil destinés à recevoir un accusé de réception dans un système de communication sans fil
WO2011025195A2 (fr) Procédé de transmission de signal de liaison descendante dans un système de communication sans fil et appareil de transmission associé
WO2011162543A2 (fr) Procédé et dispositif pour émettre et recevoir des informations de commande en voie montante dans un système de communication sans fil prenant en charge des porteuses multiples
WO2011111977A2 (fr) Procédé de transmission d'informations de commande de liaison montante et dispositif utilisateur

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12773792

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12773792

Country of ref document: EP

Kind code of ref document: A1