KR102225997B1 - Method and apparatus for indicating activation/deactivation of serving cell in wireless communication system using multiple component carrier - Google Patents

Abstract

A method and apparatus for controlling activation/deactivation of a serving cell in a wireless communication system using a plurality of CCs are provided. In a wireless communication system, a method of activation/deactivation of a serving cell by a terminal indicates that a maximum of 6 to 32 or 9 to 32 secondary serving cells are configured in the terminal through a Radio Resource Control (RRC) message from a base station. Receiving information from the base station, receiving an activation/deactivation medium access control (MAC) control element message for a secondary serving cell configured in the terminal from the base station, and up to 6 to 32 or 9 to 32 to the terminal It may include applying activation/deactivation to a corresponding secondary serving cell according to an indicator included in the activation/deactivation MAC control element based on information indicating that up to two secondary serving cells are configured.

Description

A method and apparatus for instructing activation/deactivation of a serving cell in a wireless communication system using multiple CCs {METHOD AND APPARATUS FOR INDICATING ACTIVATION/DEACTIVATION OF SERVING CELL IN WIRELESS COMMUNICATION SYSTEM USING MULTIPLE COMPONENT CARRIER}

The present invention relates to wireless communication, and when carrier aggregation is used in a wireless communication system using a plurality of component carriers, a method and apparatus for instructing activation/deactivation of a serving cell It is about.

In a wireless communication system using carrier aggregation, at least one serving cell in which frequency bands do not overlap each other may be configured for each base station, and the serving cells may be operated in an activated or deactivated state, respectively. The primary (serving) cell (PCell) configurable in the conventional carrier aggregation scheme is a serving cell in which a physical uplink control channel (PUCCH) should be configured by default, and cannot be deactivated. On the other hand, the secondary serving cell (SCell: Secondary (serving) Cell) is a serving cell in which PUCCH cannot be configured, and can be deactivated.

However, when five or more component carriers are aggregated, transmitting the PUCCH through one primary serving cell is uplink control information including feedback information required by the base station to improve radio link efficiency for a plurality of downlink component carriers. (UCI: Uplink Control Information) It is difficult to handle the amount. Accordingly, a secondary serving cell capable of configuring a PUCCH is being discussed. However, the existing activation/deactivation medium access control (MAC) control element message including activation/deactivation indicators for serving cells may include activation/deactivation indicators for up to 8 serving cells. Therefore, when more than 8 serving cells are configured in the terminal through the existing activation/deactivation MAC CE message, a problem occurs in that activation/deactivation of the corresponding serving cells cannot be indicated.

Accordingly, there is a need for a specific method for activation/deactivation of a secondary serving cell capable of configuring a PUCCH to solve this problem, and a specific activation/deactivation instruction method for increasing secondary serving cells.

An object of the present invention is to provide a method and apparatus capable of instructing activation/deactivation of up to 32 serving cells in a wireless communication system using a plurality of CCs.

Another technical problem of the present invention is to construct an activation/deactivation medium access control (MAC) control element message capable of instructing activation/deactivation of up to 32 serving cells in a wireless communication system using a plurality of component carriers. It is to provide a method and apparatus.

According to an aspect of the present invention, a method of activating/deactivating a serving cell by a terminal in a wireless communication system includes up to 6 to 32 or 9 to 32 to the terminal through a Radio Resource Control (RRC) message from the base station. Receiving information indicating that a secondary serving cell of is configured, receiving an activation/deactivation medium access control (MAC) control element message for a secondary serving cell configured in the terminal from the base station, and up to 6 to the terminal Applying activation/deactivation to a corresponding secondary serving cell according to an indicator included in the activation/deactivation MAC control element based on information indicating that up to 32 or 9 to 32 secondary serving cells are configured. Can include.

According to another aspect of the present invention, in a wireless communication system, a terminal receives information indicating that up to 6 to 32 or 9 to 32 secondary serving cells are configured in the terminal through an RRC message from a base station, An RF unit for receiving an activation/deactivation MAC control element message for a secondary serving cell configured in the terminal from the base station and indicating that a maximum of 6 to 32 or 9 to 32 secondary serving cells are configured in the terminal. It may include a processor that applies activation/deactivation to a corresponding secondary serving cell according to an indicator included in the activation/deactivation MAC control element based on the information.

According to the present invention, the base station may transmit activation/deactivation information for up to 32 serving cells through one medium access control (MAC) control element message.

In addition, the base station can recognize a situation in which up to 32 serving cells can be configured in the terminal, and the terminal can recognize that an activation/deactivation MAC control element message of a new format is transmitted.

1 is a diagram showing a wireless communication system to which the present invention is applied.
2 is a diagram illustrating a method of instructing activation/deactivation of serving cells according to an embodiment of the present invention.
3 is a diagram illustrating an activation/deactivation MAC CE according to an embodiment of the present invention.
4 is a diagram illustrating a MAC PDU according to an embodiment of the present invention.
5 is a diagram illustrating a MAC subheader according to an embodiment of the present invention.
6 is a flowchart illustrating an operation of a terminal according to an embodiment of the present invention.
7 is a diagram illustrating an activation/deactivation MAC CE according to another embodiment of the present invention.
8 is a flowchart illustrating an operation of a terminal according to the embodiment of FIG. 7.
9 is a diagram illustrating a method of instructing activation/deactivation of serving cells according to another embodiment of the present invention.
10 is a diagram illustrating an activation/deactivation MAC CE according to the embodiment of FIG. 9.
11 is a flowchart illustrating an operation of a terminal according to the embodiment of FIG. 10.
12 is a diagram illustrating an activation/deactivation MAC CE according to another embodiment of the present invention.
13 is a flowchart illustrating an operation of a terminal according to the embodiment of FIG. 12.
14 is a diagram illustrating an activation/deactivation MAC CE according to another embodiment of the present invention.
15 is a flowchart illustrating an operation of a terminal according to the embodiment of FIG. 14.
16 to 18 are diagrams illustrating activation/deactivation MAC CE according to still other embodiments of the present invention.
19 is a flowchart illustrating an operation of a base station according to the present invention.
20 is a block diagram showing a wireless communication system according to an embodiment of the present invention.

Hereinafter, in the present specification, the contents related to the present invention will be described in detail through exemplary drawings and embodiments along with the contents of the present invention. In adding reference numerals to constituent elements in each drawing, it should be noted that the same constituent elements are given the same reference numerals as much as possible even if they are indicated on different drawings. In addition, in describing an embodiment of the present specification, if it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the present specification, a detailed description thereof will be omitted.

In addition, this specification describes a wireless communication network, and operations performed in the wireless communication network are performed in the process of controlling the network and transmitting data in a system (for example, a base station) in charge of the wireless communication network, or The operation may be performed at a terminal included in the network.

1 is a diagram showing a wireless communication system to which the present invention is applied.

The network structure shown in FIG. 1 may be a network structure of an Evolved-Universal Mobile Telecommunications System (E-UMTS). The E-UMTS system is 3GPP (3rd generation) that meets the standards of IMT-2020 (International Mobile Telecommunication-2020) defined by LTE (Long Term Evolution), LTE-A (advanced) system, and ITU-R (International Telecommunication Union-Radiocommunication sector). Generation Partnership Project) standards-based network structure, etc. may be included.

Referring to FIG. 1, in a wireless communication system 10, a base station (BS) 11 and a user equipment (UE) 12 may transmit and receive data wirelessly.

In the wireless communication system 10, the base station 11 may provide a communication service to a terminal existing within the coverage of the base station through a specific frequency band. The coverage serviced by the base station may also be expressed in terms of a site. The site may include a plurality of areas 15a, 15b, and 15c, which may be referred to as sectors. Each of the sectors included in the site may be identified based on a different identifier. Each of the sectors 15a, 15b, and 15c may be interpreted as a partial area covered by the base station 11.

Base station 11 generally refers to a station communicating with the terminal 12, eNodeB (evolved-NodeB), BTS (Base Transceiver System), access point (Access Point), femto base station (Femto eNodeB), in-home A base station (HeNodeB: Home eNodeB), a relay (relay), a remote radio head (RRH: Remote Radio Head) may be referred to as other terms.

The terminal 12 may be fixed or mobile, and may be a mobile station (MS), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), a wireless device, or a personal digital assistant (PDA). , Wireless modem, handheld device, etc. may be referred to as other terms.

In addition, the base station 11 may be referred to in various terms such as a mega cell, a macro cell, a micro cell, a pico cell, and a femto cell according to the size of the coverage provided by the corresponding base station. The cell may be used as a term indicating a frequency band provided by a base station, coverage of a base station, or a base station.

Hereinafter, downlink refers to a communication or communication path from the base station 11 to the terminal 12, and uplink refers to a communication or communication path from the terminal 12 to the base station 11 do. In downlink, the transmitter may be a part of the base station 11 and the receiver may be a part of the terminal 12. In the uplink, the transmitter may be a part of the terminal 12 and the receiver may be a part of the base station 11.

Meanwhile, there is no limitation on a multiple access technique applied to the wireless communication system 10. For example, Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier-FDMA (SC-FDMA), OFDM-FDMA , OFDM-TDMA, OFDM-CDMA, such as various multiple access techniques can be used. In addition, for uplink transmission and downlink transmission, a time division duplex (TDD) scheme transmitted using different times or a frequency division duplex (FDD) scheme transmitted using different frequencies may be used.

In the above-described wireless communication system, the base station may configure a plurality of serving cells in one terminal by using carrier aggregation (CA). Here, CA is a technology for efficiently using fragmented frequency bands, and one base station combines a plurality of physically continuous or non-continuous frequency bands in the frequency domain to logically provide a broadband single frequency. This is to achieve the same effect as using bandwidth.

When a CA is configured in the terminal, the terminal has a single Radio Resource Control (RRC) connection with the network. When RRC connection establishment (establishment) / re-establishment (re-establishment) / handover, a specific serving cell provides non-access stratum (NAS) mobility information (for example, TAI: Tracking Area ID). Hereinafter, the specific serving cell is referred to as a primary (serving) cell (PCell). The primary serving cell is composed of a pair of DL PCC (Downlink Primary Component Carrier) and UL PCC (Uplink Primary Component Carrier). At this time, according to the UE's hardware capability (UE capability), secondary (serving) cells (SCells) together with the primary serving cell may be configured in the form of a serving cell set. The secondary serving cell may be configured only with a DL SCC (Downlink Secondary Component Carrier) or may be configured as a pair with a UL SCC (Uplink Secondary Component Carrier).

When the CA is configured in the terminal as described above, an activation/deactivation mechanism for the secondary serving cell is supported in order to optimize the battery consumption of the terminal. Here, the primary serving cell is a serving cell in which a physical uplink control channel (PUCCH) should be basically configured, and thus cannot be deactivated.

When the secondary serving cell is deactivated, the UE does not monitor or receive the PDCCH (Physical Downlink Control CHannel) or PDSCH (Physical Downlink Shared CHannel) corresponding to the secondary serving cell, and does not transmit any transmission through the uplink corresponding to the secondary serving cell. Can not. In addition, there is no need to perform a channel quality indicator (CQI) measurement operation for the deactivated secondary serving cell. Conversely, if the secondary serving cell is in an active state, the UE must receive the PDCCH and PDSCH. In addition, it must be able to perform CQI measurement operation. However, this is applicable only when the corresponding terminal is configured to monitor the PDCCH for the corresponding secondary serving cell.

The activation/deactivation mechanism is based on a combination of a medium access control (MAC) control element (CE) and a deactivation timer. The MAC CE represents whether to activate/deactivate each secondary serving cell as one bit, where '0' represents deactivation, and '1' represents activation. The base station may independently indicate whether to activate/deactivate the secondary serving cells through a bit corresponding to each secondary serving cell. Meanwhile, the deactivation timer is configured and maintained for each secondary serving cell, but all secondary serving cells configured in the terminal have the same deactivation timer value in common, but the deactivation timer is independently operated for each secondary serving cell. The deactivation timer value is configured through RRC signaling.

If the UE receives an RRC reconfiguration message that does not include Mobility Control Information (MCI), if there is a secondary serving cell added through the RRC reconfiguration message, the initial state is'deactivated'. The activation/deactivation state of the secondary serving cell that has been reconfigured or has not changed through the RRC reconfiguration message is not changed. That is, it remains the same. If, when the terminal receives the RRC reconfiguration message including the MCI, that is, in the case of handover, all secondary serving cells are transitioned to a'deactivated' state.

However, since the existing activation/deactivation MAC CE message including activation/deactivation indicators for serving cells configured in the terminal may include activation/deactivation indicators for up to 8 serving cells, the existing activation/deactivation When more than eight serving cells are configured in one terminal through the deactivation MAC CE message, a problem occurs in indicating activation/deactivation of the corresponding serving cells. Therefore, in the following, when a maximum of 32 serving cells are configured in a terminal, a method of instructing activation/deactivation of the serving cells will be described.

2 is a diagram showing a method of instructing activation/deactivation of serving cells according to an embodiment of the present invention, and FIGS. 3 to 5 are respectively an activation/deactivation MAC CE, MAC PDU, and It is a diagram showing the MAC subheader.

As a first embodiment, in a situation in which up to 32 serving cells can be configured for one terminal, the base station provides activation/deactivation information for the serving cells in a MAC CE format consisting of 32 bits. Can be transmitted. Therefore, when the UE recognizes the situation (a situation in which up to 32 serving cells can be configured), it is recognized that activation/deactivation information for the serving cells is transmitted in the 32-bit MAC CE format. I can. In addition, when the 32-bit MAC CE format activation/deactivation message is received, it can be checked and the serving cells configured in the terminal can be activated/deactivated.

For example, referring to FIG. 2, when the base station cannot obtain information on a specific terminal (information on the corresponding terminal is not stored in the base station, and information on the corresponding terminal is also included in the Mobility Management Entity (MME)) If not stored), the UE may request capability information of the UE including information on a frequency band supported by the UE through the UE capability transfer procedure (S210).

The terminal provides information on a frequency band that can be supported by the base station through the UE's capability information transmission procedure, information on a band combination in which CA is possible, and information on a supportable bandwidth within each frequency band. It is possible to transmit capability information of a terminal including (bandwidth combination set) and the like. Here, the information on the combinations of the frequency bands in which the CA is possible is the number of component carriers that can be configured in each frequency band included in the combination of the frequency bands in which the CA is possible and the CA using the component carriers in the discontinuous frequency band. It may contain information on whether it is possible or not. The information may be divided into uplink information and downlink information, respectively. Here, the component carrier means a downlink or uplink band constituting a serving cell.

Upon receiving the capability information of the terminal, the base station sums the number of component carriers in each frequency band included in the combination of at least one or more frequency bands among combinations of frequency bands in which CA is possible, for the entire combination of the frequency bands. When the number of downlink or uplink component carriers is 6 or 9 or more, it may be recognized that up to 32 serving cells are configurable in the corresponding terminal. Here, the coverage of 6 CCs is to support a communication environment evolving from a CA environment (system) supporting 5 CCs to a system supporting 5 or more CCs, and 9 or more CCs. The application range for is to support a communication system supporting an increased CC of 8 bits or more, considering the structure of an 8-bit MAC message.

Information on the number of component carriers that can be configured in each frequency band may be defined for each class as shown in Table 1 below. Referring to Table 1, the maximum number of CCs that can be supported for each class, the aggregated maximum bandwidth, and the like are defined.

CA Bandwidth Class Aggregated Transmission Bandwidth Configuration Number of contiguous CC Nominal Guard Band BW _GB A N _RB,agg ≤ 100 One a ₁ BW _Channel(1) -0.5Δf ₁ (NOTE 2) B 25 <N _RB,agg ≤ 100 2 0.05 max (BW _Channel(1) ,BW _Channel(2) )
-0.5Δf ₁ C 100 <N _RB,agg ≤ 200 2 0.05 max (BW _Channel(1) ,BW _Channel(2) )-0.5Δf ₁ D 200 <N _RB,agg ≤300 3 0.05 max (BW _Channel(1) ,BW _Channel(2), BW _Channel(3) )-0.5Δf ₁ E 300 <N _RB,agg ≤400 4 Applicable for later F 400 <N _RB,agg ≤500 5 Applicable for later

In Table 1, the BW _Channel(1), BW _Channel(2), and BW _Channel(3) each represent the channel bandwidth of a component carrier. The Δf Δf ₁ is for the downlink having a subcarrier spacing (subcarrier spacing) of Δf while Δf ₁ is "0" for the UL. a ₁ is _{0.16/1.4 high when BW Channel(1)} is 1.4MHz, and 0.05 for all channel bandwidths other than.

Meanwhile, the capability information of the terminal may include information indicating that a maximum of 6 to 32 serving cells can be configured in the corresponding terminal. In this case, the information (information indicating that up to 6 to 32 serving cells can be configured in the corresponding terminal) is only when up to 6 to 32 serving cells can be configured in the corresponding terminal. It can be transmitted to the base station. In the information, in the form of information on the maximum number of serving cells or secondary serving cells that can be specifically supported, one of 6 to 31 or 32 may be included. Therefore, when the base station receives the information (information indicating that up to 6 to 32 serving cells can be configured in the corresponding terminal), the corresponding terminal configures up to 6 to 32 serving cells. It can be perceived as supporting.

When five or more component carriers are aggregated for one terminal through CA, transmitting the PUCCH through one primary serving cell is feedback information required by the base station to improve radio link efficiency for a plurality of downlink component carriers. It is difficult to handle the amount of uplink control information (UCI) including. Therefore, in this case, two or more serving cells capable of transmitting a PUCCH may be configured in the UE. Here, one of the serving cells capable of PUCCH transmission is a primary serving cell, and the remaining serving cells are secondary serving cells. Hereinafter, a secondary serving cell capable of transmitting PUCCH in addition to the primary serving cell is referred to as a PUCCH secondary serving cell. The secondary serving cell configured in the terminal may be mapped to a primary serving cell to form a cell group, or may be mapped to a PUCCH secondary serving cell to form a cell group. Hereinafter, a cell group including a primary serving cell is referred to as a Primary Cell Group (PCG), and a cell group including a PUCCH secondary serving cell is referred to as a PUCCH Secondary Cell Group (PSCG).

The base station may transmit information on a mapping relationship between the primary serving cell and/or the PUCCH secondary serving cell and the secondary serving cells to the terminal by using RRC signaling. In addition, if information on a cell group and the mapping relationship are different, independent RRC signaling may be defined to support this, or a cell group may be statically defined based on a serving cell index. In this case, when information on the number of cell groups is provided, a range of the serving cell index included in each cell group may be determined according to the information.

Information indicating whether the terminal supports the configuration of the PUCCH secondary serving cell may be included in the information (capability information of the terminal) transmitted when the terminal supports the configuration of up to 32 serving cells, and the maximum supportable Information on the number of PUCCH secondary serving cells may also be included. Alternatively, information indicating whether the configuration of the PUCCH secondary serving cell is supported as one component of information on each frequency band in the information on the possible band combination of the frequency bands in which the CA is possible may be included. Accordingly, the base station can check the frequency band and number of PUCCH secondary serving cells that can be configured for each frequency band combination. This can be transmitted only when the terminal supports the PUCCH secondary serving cell.

Additionally, information on whether the terminal supports simultaneous PUCCH transmission is also information transmitted when the corresponding terminal supports the configuration of up to 32 serving cells or the combination of frequency bands in which the CA is possible. It may be included as one component of information on each frequency band in the information.

Meanwhile, the PUCCH secondary serving cell may also support activation/deactivation. However, while the PUCCH secondary serving cell is deactivated, secondary serving cells belonging to a corresponding PSCG (ie, secondary serving cells having a mapping relationship with the PUCCH secondary serving cell) cannot be activated. Accordingly, the PUCCH secondary serving cell is not deactivated when secondary serving cells belonging to the corresponding PSCG are activated. If the UE receives a MAC PDU (Protocol Data Unit) including information indicating deactivation of a PUCCH secondary serving cell in a mapping relationship with the activated secondary serving cells from the base station, the UE discards the MAC PDU. You can (discard) it.

When the base station recognizes that up to 32 serving cells can be configured in the corresponding terminal through the UE's capability information transmission procedure (S210) or PUCCH secondary serving cells can be configured, the RRC reconfiguration procedure After adding, removing, or reconfiguring a secondary serving cell to the terminal through (S220), a MAC PDU including an activation/deactivation MAC CE as shown in FIG. 3(a) or 3(b) is transmitted (S230). ).

4, the MAC PDU is composed of one MAC header, '0' or one or more MAC CEs, '0' or one or more MAC Service Data Units (SDUs) and padding. Here, the MAC header and MAC SDU have a variable length, and padding may be optionally included in the MAC PDU.

The MAC header consists of one or more MAC subheaders. Each MAC subheader corresponds to a MAC SDU or MAC CE or padding of each MAC PDU. That is, the subheaders of the MAC PDU have the same order as the corresponding MAC SDU, MAC CE, and padding.

The MAC CE for activation/deactivation of the serving cell corresponds to the MAC subheader of the type (R/R/E/LCID type) as shown in FIGS. 5(a) to 5(c). The MAC sub-header includes six fields (R, R, E, LCID, F, L) as shown in FIGS. 5(a) and 5(b), or as shown in FIG. 5(c). It includes four fields (R, R, E, LCID). 5(a) to 5(c), a logical channel identification information (LCID: Logical Channel ID) field identifies a logical channel of a corresponding MAC SDU or a corresponding MAC control element or a type of padding. And the length (L: Length) field identifies the length of the corresponding MAC SDU or the length of a variable-sized MAC control element. The F field is a field that identifies the length of the L field, the E: Extension field is a field that identifies whether other fields exist in the MAC header, and the R (Reserved) field is a reserved field and is set to "0". do.

The base station can use the 32-bit activation/deactivation MAC CE format as shown in Fig. 3(a) in the following situations (situations 1 to 3). Hereinafter, the 32-bit activation/deactivation MAC CE is referred to as an extended activation/deactivation MAC CE. The 8-bit activation/deactivation MAC CE format as shown in FIG. 3(b) can be used in cases other than the following situations.

Situation 1: When the total number of serving cells configured in the terminal by the base station through the RRC reconfiguration procedure is 6 or 9 or more.

In this case, regardless of whether or not the PUCCH secondary serving cell is configured, the base station can use the extended activation/deactivation MAC CE format as shown in FIG. 3(a). At this time, the base station uses the LCID ('11011') for the 8-bit activation/deactivation MAC CE among the LCIDs shown in Table 2 below for the extended activation/deactivation MAC CE, or the extended activation/deactivation MAC CE. A new LCID ('11001') can be used.

Index LCID values 00000 CCCH 00001-01010 Identity of the logical channel 01011-11000 Reserved 11001 Extended Activation/Deactivation 11010 Long DRX Command 11011 Activation/Deactivation 11100 UE Contention Resolution Identity 11101 Timing Advance Command 11110 DRX Command 11111 Padding

Referring to Table 2, the LCID value for the 32-bit activation/deactivation MAC CE for activation/deactivation of the serving cell may be set to '11001', and the LCID value for the 8-bit activation/deactivation MAC CE is' It may be set to 11011'. Accordingly, the MAC CE corresponding to the subheader of the MAC PDU with the LCID value set to '11001' can be interpreted as shown in Fig. 3(a), and the MAC corresponding to the subheader of the MAC PDU with the LCID value set to '11011' CE can be interpreted as shown in Fig. 3(b).

3A and 3B, C ₁ is an indicator indicating activation/deactivation of the secondary serving cells having the index value '1' when a secondary serving cell having an index value '1' is configured. to be. Similarly, C ₂ is an indicator indicating activation/deactivation of the secondary serving cells having the index value '2' when a secondary serving cell having the index value '2' is configured. In this case, the terminal may ignore a field for a secondary serving cell that is not configured in the terminal. 'R' is a reserved bit and is always set to '0'.

Situation 2: When the base station configures at least one PUCCH secondary serving cell in the terminal, and when the terminal receives RRC messages for PCG and PSCGs.

In this case, the (sub) serving cell index of the PUCCH secondary serving cell(s) may be arbitrarily set by the base station among _{C 1} to C _31. Even in this case, the base station may use the LCID for the 8-bit activation/deactivation MAC CE among the LCIDs shown in Table 2 as it is, or use a new LCID for the extended activation/deactivation MAC CE.

Situation 3: When the base station informs the terminal that the extended activation/deactivation MAC CE will be transmitted through a separate RRC message.

The separate RRC message may be defined as enable information for extended activation/deactivation MAC CE. The enable information for the extended activation/deactivation MAC CE may be included in the RRC reconfiguration message as shown in Table 3 below, or in the MAC-MainConfig including main configuration information for the MAC as shown in Table 4 below. In this case, in order to distinguish between 8-bit activation/deactivation MAC CE and 32-bit activation/deactivation MAC CE, the 8-bit activation/deactivation MAC CE contains a new one for extended activation/deactivation MAC CE among the LCIDs shown in Table 2. LCID can be assigned.

RF-Parameters ::= SEQUENCE {
...
supportedBandCombination SupportedBandCombination OPTIONAL
}
SupportedBandCombination ::= SEQUENCE (SIZE (1..maxBandComb)) OF BandCombinationParameters
BandCombinationParameters ::= SEQUENCE {
bandParameterList SEQUENCE (SIZE (1..maxSimultaneousBands)) OF
BandParameters,
supportedBandwidthCombinationSet SupportedBandwidthCombinationSet OPTIONAL,
multipleTimingAdvance ENUMERATED {supported} OPTIONAL,
simultaneousRx-Tx ENUMERATED {supported} OPTIONAL,
bandInfoEUTRA BandInfoEUTRA,
...
}
BandParameters ::= SEQUENCE {
bandEUTRA FreqBandIndicator,
bandParametersUL BandParametersUL OPTIONAL,
bandParametersDL BandParametersDL OPTIONAL,
}
BandParametersUL ::= SEQUENCE (SIZE (1..maxBandwidthClass)) OF CA-MIMO-ParametersUL
CA-MIMO-ParametersUL ::= SEQUENCE {
ca-BandwidthClassUL CA-BandwidthClass,
supportedMIMO-CapabilityUL MIMO-CapabilityUL OPTIONAL
}
BandParametersDL ::= SEQUENCE (SIZE (1..maxBandwidthClass)) OF CA-MIMO-ParametersDL
CA-MIMO-ParametersDL ::= SEQUENCE {
ca-BandwidthClassDL CA-BandwidthClass,
supportedMIMO-CapabilityDL MIMO-CapabilityDL OPTIONAL
}
CA-BandwidthClass ::= ENUMERATED {a, b, c, d, e, f, ...}

MAC-MainConfig ::= SEQUENCE {
...
[[mac-MainConfig-v13xx SEQUENCE {
...
extendedAD ENUMERATED {setup} OPTIONAL - Need OR
} OPTIONAL - Need ON
]],

Here, a description of the terms included in Tables 3 and 4 is given in Table 5 below.

Abbreviation Meaning Need ON
(Used in downlink only) Optionally present, No action
An information element that is optional to signal. If the message is received by the UE, and in case the information element is absent, the UE takes no action and where applicable shall continue to use the existing value (and/ or the associated functionality). Need OR
(Used in downlink only) Optionally present, Release
An information element that is optional to signal. If the message is received by the UE, and in case the information element is absent, the UE shall discontinue/ stop using/ delete any existing value (and/ or the associated functionality).

When 9 or more serving cells are configured through an RRC reconfiguration procedure, when at least one PUCCH secondary serving cell is configured, or when an extended activation/deactivation MAC CE is instructed to be transmitted, it is shown in FIG. 3(a). All serving cells configured in the terminal according to the activation/deactivation indicator included in the message when a message (MAC PDU) including the activation/deactivation MAC CE is received from the base station after recognizing that the same activation/deactivation MAC CE is received. Activate or deactivate them (S240). However, if 8 or less serving cells are configured through the RRC reconfiguration procedure, PUCCH secondary serving cells are not configured, or information indicating that extended activation/deactivation MAC CE is transmitted is not received, the terminal is activated from the base station. When a message including/deactivation MAC CE is received, the activation/deactivation MAC CE is recognized as in the format shown in FIG. 3(b), and all servings configured in the terminal according to the activation/deactivation indicator included in the message Activate or deactivate cells.

6 is a flowchart illustrating an operation of a terminal according to an embodiment of the present invention.

Referring to FIG. 6, the UE may configure 6 or 9 or more serving cells through an RRC reconfiguration message. When at least one PUCCH secondary serving cell is configured according to the present invention or when an extended activation/deactivation MAC CE is instructed to be transmitted, an activation/deactivation MAC CE extended to 32 bits as shown in FIG. It can be recognized that it is used and received (S610).

Here, when the UE receives a request from the base station to transmit capability information of the UE through the capability information transmission procedure of the UE, the UE may configure and transmit the capability information of the UE to the base station. Here, the capability information of the terminal may include information on a frequency band that can be supported by the terminal, information on combinations of frequency bands in which CA is possible, information on a supportable bandwidth in each frequency band, and the like. In addition, the capability information of the terminal may include information indicating that up to 32 serving cells can be configured in the corresponding terminal. The above procedure occurs only when the base station does not have the capability information for the UE and the capability information for the UE cannot be secured even through the Mobility Management Entity (MME).

Accordingly, the base station may transmit an RRC reconfiguration message for configuring 6 or 9 or more serving cells to the terminal based on the capability information for the corresponding terminal. In addition, the RRC reconfiguration message may include information on a cell group (mapping information between a primary serving cell (or PUCCH secondary serving cell) and a secondary serving cell(s)).

The terminal receives the activation/deactivation MAC CE from the base station (S620). It is possible to check whether the corresponding activation/deactivation MAC CE is an extended activation/deactivation MAC CE, and apply activation/deactivation to all serving cells configured in the terminal according to an indicator included in the activation/deactivation MAC CE (S630). .

7 is a diagram illustrating an activation/deactivation MAC CE according to another embodiment of the present invention.

As a second embodiment, when the PUCCH secondary serving cell configured in the terminal by the base station can be set to one of fixed (sub) serving cell indexes such as _{C 8} , C ₁₆ , C _{24, etc., the base station is shown in FIG.} As shown in 7(b), an activation/deactivation MAC CE having a variable length according to the number of PUCCH secondary serving cells configured in the terminal can be transmitted. In this case, a situation in which up to 32 serving cells can be configured is as follows.

Situation 1: When the base station configures at least one PUCCH secondary serving cell in the terminal.

In this case, up to 7 secondary serving cells may be mapped for each primary serving cell and PUCCH secondary serving cell. That is, at least one primary serving cell or PUCCH secondary serving cell may be configured for each cell group, and up to seven secondary serving cells may be included per cell group. As an example, FIG. 7(a) shows a case in which one PUCCH secondary serving cell is configured in a terminal, and FIG. 7(b) shows a case in which three PUCCH secondary serving cells are configured in a terminal. 7(a) and 7(b), the index of the PUCCH secondary serving cell may be fixedly set to one _{of C 8} , C ₁₆ , and C _24.

Situation 2: When the base station informs the terminal that it will transmit the activation/deactivation MAC CE of the new format as shown in FIGS. 7(a) and 7(b) through separate RRC messages.

The separate RRC message may be defined as enable information for the extended activation/deactivation MAC CE in the RRC reconfiguration message as shown in Table 4 above. If the base station transmits an RRC reconfiguration message including enable information for the activation/deactivation MAC CE of the new format to the terminal even though the PUCCH secondary serving cell is not configured in the terminal, the base station extends activation/deactivation. The MAC subheader is configured by using the LCID for the inactive MAC CE format (LCID corresponding to the '11001' value in Table 2), but the format of the active/deactivated MAC CE configured at this time is shown in FIG. 3(b). Either activation/deactivation MAC CE having a length of 8 bits as described above may be used, or activation/deactivation MAC CE having a length of 16 bits to 32 bits according to the total number of secondary serving cells configured in the terminal may be used.

For example, when the total number of secondary serving cells is 8 to 15, the activation/deactivation MAC CE has a length of 16 bits, and when the total number of secondary serving cells is 16 to 23, the activation/deactivation MAC CE is 24 bits. When the total number of secondary serving cells is 24 to 31, the activation/deactivation MAC CE has a length of 32 bits. To this end, the base station may change the index of each secondary serving cell through an RRC connection reconfiguration procedure in advance.

Alternatively, the format of the activation/deactivation MAC CE configured at this time is the activation/deactivation MAC CE having a length of 8 bits as shown in FIG. 3(b), or the maximum (sub ) Activation/deactivation MAC CE having a length of 16 to 32 bits may be used depending on the value of the serving cell index.

For example, when the maximum (sub) serving cell index value is 8 to 15, the activation/deactivation MAC CE has a length of 16 bits, and when the maximum (sub) serving cell index value is 16 to 23, the activation/deactivation MAC The CE has a length of 24 bits, and when the value of the maximum (sub) serving cell index is 24 to 31, the activation/deactivation MAC CE has a length of 32 bits.

In the second embodiment described above, since the length of the activation/deactivation MAC CE of the new format is determined according to the number of PUCCH secondary serving cells configured in the terminal or the total number of secondary serving cells, activation/deactivation of the new format MAC CE As shown in FIG. 5(c), a subheader having an 8-bit length without an F/L field may be used.

8 is a flowchart illustrating an operation of a terminal according to the embodiment of FIG. 7.

Referring to FIG. 8, when at least one PUCCH secondary serving cell is configured through an RRC reconfiguration message, or when an extended activation/deactivation MAC CE is instructed to be transmitted, FIG. 7(a), FIG. 7(b) It may be recognized that activation/deactivation MAC CE of a new format as shown in FIG. 2 is received (S820).

Here, when the UE receives a request from the base station to transmit capability information of the UE through the capability information transmission procedure of the UE, the UE may configure capability information of the UE and transmit it to the base station (S810). Here, the capability information of the terminal may include information on a frequency band that can be supported by the terminal, information on combinations of frequency bands in which CA is possible, information on a supportable bandwidth in each frequency band, and the like. In addition, the capability information of the terminal may include information indicating that a maximum of 6 (or 9) to 32 serving cells can be configured in the corresponding terminal. In addition, the RRC reconfiguration message may include information on a cell group (mapping information or cell group information between a primary serving cell (or PUCCH secondary serving cell) and a secondary serving cell(s)).

The UE receives the activation/deactivation MAC CE of the new format (for the configuration of up to 6 (or 9) to 32 serving cells) according to the present invention from the base station (S830). Activation/deactivation may be applied to all serving cells configured in the terminal based on the number of PUCCH secondary serving cells configured in the terminal or the total number of secondary serving cells (S840).

In the first and second embodiments, if the terminal receives an RRC reconfiguration message that does not include mobility control information (MCI), the secondary service is added through the RRC reconfiguration message or the configuration is changed. When the cell is a PUCCH secondary serving cell, its initial state is'deactivated'. The activation/deactivation state of the secondary serving cell that has been reconfigured or has not changed through the RRC reconfiguration message is not changed. That is, it remains the same. If the UE receives the RRC reconfiguration message including MCI, that is, in the case of handover, all secondary serving cells including the PUCCH secondary serving cell transition to a'deactivated' state. Additionally, since the PUCCH resources and SRS resources of the PUCCH secondary serving cell are no longer available in the handover base station, the UE releases all of them and releases all SRS resources.

9 is a diagram illustrating a method of instructing activation/deactivation of serving cells according to another embodiment of the present invention, and FIG. 10 is a diagram illustrating activation/deactivation MAC CE according to the embodiment of FIG. 9.

As a third embodiment, in the case of a situation in which up to 6 (or 9) to 32 serving cells can be configured for one terminal, the base station activates a new format for a single cell group having a variable length. /Disable MAC CE can be configured and transmitted to the terminal. That is, the length (number of bits) of the new format activation/deactivation MAC CE for the single cell group may be changed according to the number of serving cells included in the cell group.

For example, referring to FIG. 9, when the base station cannot obtain information on a specific terminal (information on the corresponding terminal is not stored in the base station, information on the corresponding terminal is also included in the Mobility Management Entity (MME)). If not stored), the UE may request capability information of the UE including information on a frequency band that the UE can support through a UE capability transfer procedure (S910).

The terminal provides information on a frequency band that can be supported by the base station through the UE's capability information transmission procedure, information on a band combination in which CA is possible, and information on a supportable bandwidth within each frequency band. It is possible to transmit capability information of a terminal including (bandwidth combination set) and the like. Here, the information on the combinations of the frequency bands in which the CA is possible is the number of component carriers that can be configured in each frequency band included in the combination of the frequency bands in which the CA is possible and the CA using the component carriers in the discontinuous frequency band. It may contain information on whether it is possible or not. The information may be divided into uplink information and downlink information, respectively.

The base station may check whether a maximum of 6 (or 9) to 32 serving cells can be configured in the corresponding terminal based on the capability information of the terminal. When it is confirmed that the terminal can configure up to 6 (or 9) to 32 serving cells, the base station activates a new format for the single cell group to the terminal in a separate RRC message through an RRC reconfiguration procedure. It may be notified that the deactivated MAC CE is transmitted (S920).

In this case, when the activation/deactivation MAC CE is received through the serving cell in the PCG (S930), the terminal recognizes that the indicator included in the activation/deactivation MAC CE is an activation/deactivation indicator for the serving cells in the PCG, and the When activation/deactivation is applied to the serving cells in the PCG (S940), and the activation/deactivation MAC CE is received through the serving cell in the PSCG (S950), the indicator included in the activation/deactivation MAC CE is a serving cell in the PCG. Activation/deactivation may be applied to the serving cells in the PSCG by recognizing that it is an activation/deactivation indicator for the PSCG (S960).

That is, when the UE receives the activation/deactivation MAC CE of a new format for a single cell group as shown in FIGS. 10(a) and 10(b), the serving cell in which the corresponding activation/deactivation MAC CE is received. As a reference, it is possible to recognize the activation/deactivation indicator for which cell group the indicator included in the corresponding activation/deactivation MAC CE is.

The activation/deactivation MAC CE of the new format for the single cell group as shown in FIGS. 10(a) and 10(b) is among the extended activation/deactivation fields shown in Table 4 and the LCID of Table 2 by the base station. It can be used when notifying the terminal that the activation/deactivation MAC CE of the new format for the single cell group will be transmitted through a separate RRC message based on a new LCID (LCID for the extended activation/deactivation MACE CE).

The length of the new format activation/deactivation MAC CE for the single cell group is different according to the number of serving cells included in the cell group, and the (sub) serving cell index for the position of the bit indicating activation/deactivation is the cell It may be a serving cell index within the group. To this end, there is a (sub) serving cell index configured for each terminal, and in addition to this, a serving cell index within a group may be allocated for each serving cell.

For example, assuming that the number of serving cells included in the PCG is 7 and the number of serving cells included in the PSCG is 14, the base station B _{1 to secondary serving cells in the PCG based on the number of serving cells in each cell group.} A serving cell index within a group having a range of B to B ₇ may be configured, and a serving cell index within a group having a range of B ₁ to B1 ₅ may be configured for secondary serving cells within the PSCG. In addition, activation/deactivation MAC CE as shown in FIG. 10(a) is transmitted for serving cells in PCG, and activation/deactivation MAC CE as shown in FIG. 10(b) for serving cells in PSCG. Can be transmitted. When the activation/deactivation MAC CE according to FIG. 10(a) is transmitted, as a subheader for the corresponding activation/deactivation MAC CE, as shown in FIG. 5(c), an 8-bit long subheader without an F/L field is It can be used, and in case of transmitting the activation/deactivation MAC CE according to FIG. 10(b), the F/L as shown in FIG. 5(a) or 5(b) as a subheader for the corresponding activation/deactivation MAC CE. A subheader including a field may be used.

11 is a flowchart illustrating an operation of a terminal according to the embodiment of FIG. 10.

Referring to FIG. 11, the UE receives an RRC message indicating to transmit an activation/deactivation MAC CE of a new format for a single cell group from a base station through an RRC connection reconfiguration procedure (S1120). Here, the terminal may recognize that the activation/deactivation MAC CE of a new format for a single cell group as shown in FIGS. 10A and 10B is transmitted.

Here, in the third embodiment, when the UE receives a request from the base station to transmit capability information of the UE through the capability information transmission procedure of the UE, the UE may configure capability information of the UE and transmit it to the base station (S1110). Here, the capability information of the terminal may include information on a frequency band that can be supported by the terminal, information on combinations of frequency bands in which CA is possible, information on a supportable bandwidth in each frequency band, and the like. In addition, the capability information of the terminal may include information indicating that a maximum of 6 (or 9) to 32 serving cells can be configured in the corresponding terminal. Further, the RRC message may include information on a cell group (mapping information or cell group information between a primary serving cell (or PUCCH secondary serving cell) and a secondary serving cell(s)).

Thereafter, when the UE receives the activation/deactivation MAC CE of a new format for a single cell group, the serving cell in which the activation/deactivation MAC CE is received is included based on the serving cell index and the serving cell index in the cell group. Activation/deactivation may be applied to serving cells in the cell group (S1130). If all of the secondary serving cells configured in the terminal have a mapping relationship with the primary serving cell, that is, when only one cell group is configured in the terminal, the serving cell index allocated to the (sub) serving cell (from C ₁ to C ₃₁ Any one) and the serving cell index ( _{any one of B 1} to B ₃₁ ) in the cell group may be the same.

12 is a diagram illustrating an activation/deactivation MAC CE according to another embodiment of the present invention.

As a fourth embodiment, the base station configures activation/deactivation MAC CE based on PCG and PSCG in a situation in which up to 6 (or 9) to 32 serving cells can be configured for one terminal. can do. In this case, the UE may determine the coverage range of the activation/deactivation MAC CE based on the serving cell on which the activation/deactivation MAC CE has been received. The activation/deactivation MAC CE used at this time may be an 8-bit activation/deactivation MAC CE. The activation/deactivation MAC CE can use the LCID for the 8-bit activation/deactivation MAC CE as it is, and the LCID for the activation/deactivation MAC CE of the new format as needed (LCID for activation/deactivation extended in Table 2) ) Can also be used. Therefore, RRC configuration for this may be unnecessary. At this time, for the activation/deactivation MAC CE, an 8-bit subheader without an F/L field as shown in FIG. 5(c) may be used.

For example, the (sub) serving cell indexes of the secondary serving cells included in the PCG including the primary serving cell and 3 secondary serving cells are #3, #21, and #31, respectively, and the PUCCH secondary serving cell and 6 sub-serving cells Assuming that the (sub) serving cell indexes of the secondary serving cells included in the PSCG including the serving cell are #2, #9, #12, #17, #18, and #25, respectively, the serving cell in the PCG (primary serving cell The activation/deactivation MAC CE received through) is interpreted as shown in FIG. 12(a), and the activation/deactivation MAC CE received through the serving cell (PUCCH secondary serving cell) in the PSCG is as shown in FIG. 12(b). Can be interpreted as In this case, the indicator for the PUCCH secondary serving cell in the activation/deactivation MAC CE may be located in a bit corresponding to the primary serving cell. That is, in FIG. 12(b), the index of the PUCCH secondary serving cell may be #2.

The reason for changing the mapping relationship of the (sub) serving cell index according to the bit position of the activation/deactivation MAC CE as described above is that in order to change the (sub) serving cell index, it is necessary to first remove the secondary serving cell and add it again. Therefore, when the (sub) serving cell index is changed while reconfiguring the mapping relationship between the primary serving cell (or PUCCH secondary serving cell) and the secondary serving cells through the RRC reconfiguration procedure, HARQ (Hybrid Automatic Repeat Request) retransmission, etc. This is because it can affect a series of actions that must continue together.

13 is a flowchart illustrating an operation of a terminal according to the embodiment of FIG. 12.

13, the UE receives an RRC message including information on a cell group (mapping information between a primary serving cell (or PUCCH secondary serving cell) and a secondary serving cell(s)) from a base station through an RRC connection reconfiguration procedure. Do (S1320). Based on the information on the cell group, an application range of the activation/deactivation MAC CE received from the base station may be recognized (S1330).

Here, in the fourth embodiment, when the UE requests transmission of the UE capability information from the base station through the UE capability information transmission procedure, the UE may configure capability information of the UE and transmit it to the base station (S1310). Here, the capability information of the terminal may include information on a frequency band that can be supported by the terminal, information on combinations of frequency bands in which CA is possible, information on a supportable bandwidth in each frequency band, and the like. In addition, the capability information of the terminal may include information indicating that a maximum of 6 (or 9) to 32 serving cells can be configured in the corresponding terminal.

Thereafter, when the activation/deactivation MAC CE is received, the terminal may apply activation/deactivation to the serving cells in the cell group including the serving cell in which the activation/deactivation MAC CE has been received (S1340). In this case, the PCG and PSCG include a primary serving cell or at least one PUCCH secondary serving cell, and up to seven secondary serving cells may be included.

14 is a diagram illustrating an activation/deactivation MAC CE according to another embodiment of the present invention.

As a fifth embodiment, as in the fourth embodiment, the base station is in a situation in which a maximum of 6 (or 9) to 32 serving cells can be configured for one terminal, based on PCG and PSCG. 8-bit enable/disable MAC CE can be configured. Even in this case, as in the fourth embodiment, the activation/deactivation MAC CE may use the LCID for the 8-bit activation/deactivation MAC CE as it is, and the LCID for the activation/deactivation MAC CE of a new format (table LCID for activation/deactivation extended in 2) may also be used. However, in this case, the UE may determine the coverage range of the activation/deactivation MAC CE based on the serving cell on which the activation/deactivation MAC CE is received, as in the fourth embodiment, but unlike in the fourth embodiment, the activation/deactivation MAC CE The mapping relationship of the (sub) serving cell index according to the bit position of may be fixed. Even at this time, for the activation/deactivation MAC CE, a subheader having an 8-bit length without an F/L field as shown in FIG. 5(c) may be used.

For example, as shown in FIG. 14, the (sub) serving cell index of the secondary serving cell included in the PCG is fixed to one of #1 to #7, respectively, and the (sub) serving cell of the secondary serving cell included in the first PSCG The serving cell index is fixed to #8 to #15, respectively, the (sub) serving cell index of the secondary serving cell included in the second PSCG is fixed to #16 to #23, respectively, and the secondary serving cell included in the third PSCG The (sub) serving cell index of may be fixed to #24 to #31, respectively. In this case, the (sub) serving cell index of the PUCCH secondary serving cell may be one of the (sub) serving cell indexes in each PSCG.

15 is a flowchart illustrating an operation of a terminal according to the embodiment of FIG. 14.

In a fifth embodiment, the UE receives an RRC message including information on a cell group (mapping information between a primary serving cell (or PUCCH secondary serving cell) and a secondary serving cell(s)) from the base station through an RRC connection reconfiguration procedure. It receives (S1520). Here, when the UE receives a request from the base station to transmit capability information of the UE through the capability information transmission procedure of the UE, the UE may configure capability information of the UE and transmit it to the base station (S1510). Here, the capability information of the terminal may include information on a frequency band that can be supported by the terminal, information on combinations of frequency bands in which CA is possible, information on a supportable bandwidth in each frequency band, and the like. In addition, the capability information of the terminal may include information indicating that a maximum of 6 (or 9) to 32 serving cells can be configured in the corresponding terminal.

The terminal may recognize the coverage of the activation/deactivation MAC CE received from the base station based on the information on the cell group (S1530). Thereafter, when the activation/deactivation MAC CE is received, the UE activates/deactivates serving cells in the corresponding cell group based on the index of the primary serving cell where the activation/deactivation MAC CE is received and/or the index of the PUCCH secondary serving cell. Can be applied (S1540). In this case, the PCG and PSCG include a primary serving cell or at least one PUCCH secondary serving cell, and up to seven secondary serving cells may be included.

16 is a diagram illustrating an activation/deactivation MAC CE according to another embodiment of the present invention.

As a sixth embodiment, the base station is based on each PCG and PSCG in a situation in which a maximum of 6 (or 9) to 32 serving cells can be configured for one terminal as in the fourth embodiment. As a result, an activation/deactivation MAC CE having a fixed length of 16 bits can be configured. In this case, the LCID for activation/deactivation MAC CE of the new format (LCID for activation/deactivation extended in Table 2) is used. The UE can determine the coverage range of the activation/deactivation MAC CE based on the serving cell set indicated by the serving cell set index in the activation/deactivation MAC CE, and (sub) serving according to the bit position of the activation/deactivation MAC CE. The cell index mapping relationship is fixed. Even at this time, for the activation/deactivation MAC CE, an 8-bit long subheader without an F/L field as shown in FIG. 5C may be used. Here, the serving cell set is fixedly configured, and the serving cell set #0 has a serving cell index of 0 to 7, the serving cell set #1 has a serving cell index of 8 to 15, and the serving cell set #2 is 16 to It has a serving cell index of 23, and serving cell set #3 has a serving cell index of 24 to 31.

For example, as shown in FIG. 16, the (sub) serving cell index of the secondary serving cell included in each serving cell set is determined according to each serving cell set as described above, and is in ascending order from the rightmost bit to the left. The (sub) serving cell index is mapped. In this case, the (sub) serving cell index of the PUCCH secondary serving cell may be one of the (sub) serving cell indexes in each serving cell set, or the PUCCH secondary serving cell may not exist. The serving cell set used in this embodiment may be the same concept as a cell group that is statically defined based on the serving cell index described above. Alternatively, the serving cell set index may be defined as a parameter indicating the range of the (sub) serving cell index indicated by the activation/deactivation MAC CE, not in a form in which the actual serving cell set is configured in the terminal. That is, the serving cell index of 0 to 7 can be indicated through the value of m = 0 in FIG. 16, the serving cell index of 8 to 15 through the value of m = 1, and serving of 16 to 23 through the value of m = 2 It has a cell index, and has a serving cell index of 24 to 31 through a value of m = 3.

17 and 18 are diagrams illustrating activation/deactivation MAC CE according to another embodiment of the present invention.

As a seventh embodiment, the base station is based on each PCG and PSCG in a situation in which a maximum of 6 (or 9) to 32 serving cells can be configured for one terminal as in the fourth embodiment. It is possible to configure an activation/deactivation MAC CE having a variable length. In this case, the LCID for activation/deactivation MAC CE of the new format (LCID for activation/deactivation extended in Table 2) is used. The terminal may determine the coverage of the activation/deactivation MAC CE as the PCG or PSCG based on the PCG or PSCG indicated by the PUCCH SCell index or the PCell index in the activation/deactivation MAC CE, and the activation/deactivation MAC CE bit The mapping relationship of the (sub) serving cell index according to the location may be changed. Even at this time, for the activation/deactivation MAC CE, an 8-bit long subheader without an F/L field as shown in FIG. 5C may be used.

For example, as shown in FIG. 17, the (sub) serving cell index of the secondary serving cell included in the PCG is composed of the indexes of the serving cells included in the PCG among #0 to #31, respectively, from the rightmost bit to the left. The (sub) serving cell index is mapped in an ascending order in the direction. In this case, the (sub) serving cell index of the PUCCH secondary serving cell may be one of the (sub) serving cell indexes in each PSCG. If the number of serving cells in the PCG or PSCG is less than 8, there may be bits to which the (sub) serving cell index is not mapped as shown in FIG. 17, and the bits may be ignored by the terminal. As an example, FIG. 17 is a PSCG composed of a total of 4 secondary serving cells having a (sub) serving cell index = {1, 3, 7, 11}.

Alternatively, as shown in FIG. 18, the (sub) serving cell index may be mapped in ascending order within a range in which the (sub) serving cell index does not exceed #31 based on the maximum value of the (sub) serving cell index in the PSCG. If the (sub) serving cell index reaches #31 but there are bits that are not sub) serving cell index mapped, the bit may be ignored by the terminal.

19 is a flowchart illustrating an operation of a base station according to the present invention.

The base station may check whether 9 (or 6) or more and up to 32 serving cells can be configured in the terminal in order to support CAs of up to 32 serving cells for one terminal (S1910). To this end, for example, the base station checks the terminal information stored in the base station, the terminal information stored in the MME, etc., and if information on the corresponding terminal is not secured, the capability information of the terminal to the corresponding terminal through the procedure of transmitting the capability information Can be requested from the corresponding terminal.

When it is confirmed that up to 32 serving cells can be configured in the corresponding terminal based on the capability information of the terminal, the base station may transmit CA configuration information to the corresponding terminal through an RRC connection reconfiguration procedure (S1920). In this case, the base station may inform the corresponding terminal that it will transmit the activation/deactivation MAC CE of the new format to the terminal through an additional RRC message. Alternatively, it is possible to implicitly instruct the corresponding terminal to transmit the activation/deactivation MAC CE of a new format by transmitting information on the cell group to the corresponding terminal.

Thereafter, the base station determines whether to activate/deactivate each secondary serving cell configured in the corresponding terminal (S1930), and configures an activation/deactivation MAC CE of a new format according to the determination, and can transmit it in the form of a MAC PDU ( S1940).

In the third, fourth and fifth embodiments, if the terminal receives an RRC reconfiguration message that does not include mobility control information (MCI), it is added through the RRC reconfiguration message or When the configuration-changed secondary serving cell is a PUCCH secondary serving cell, its initial state is'active'. That is, the PUCCH secondary serving cell may be activated when the PUCCH is configured through an RRC reconfiguration message. If the PUCCH secondary serving cell is deactivated by the base station, the UE may release all of the PUCCH resources of the PUCCH secondary serving cell or release only resources for transmitting ACK/NACK information for downlink data. The activation/deactivation state of the secondary serving cell that has been reconfigured or has not changed through the RRC reconfiguration message is not changed. That is, it remains the same. If the UE receives the RRC reconfiguration message including MCI, that is, in the case of handover, all secondary serving cells including the PUCCH secondary serving cell transition to a'deactivated' state. Additionally, since the PUCCH resources and SRS resources of the PUCCH secondary serving cell are no longer available in the handover base station, the UE releases all of them and releases all SRS resources.

20 is a block diagram showing a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 20, a wireless communication system supporting communication between terminals according to the present invention includes a base station 2000 and a terminal 2100.

The base station 1700 includes a processor (processor, 2010), an RF unit (RF (radio frequency) unit, 2020), and a memory (memory, 2030). The memory 2030 is connected to the processor 2010 and stores various information for driving the processor 2010. The RF unit 200 is connected to the processor 2010 and transmits and/or receives a radio signal. For example, the RF unit 2020 may receive an uplink signal including the capability information of the terminal published in this specification from the terminal 2100. In addition, the RF unit 2020 may transmit an RRC message, an activation/deactivation MAC CE message, and the like posted in this specification to the terminal 2100.

The processor 2010 implements the functions, processes, and/or methods proposed in this specification. In more detail, the processor 2010 may enable the operation of the base station 2000 according to the first to seventh embodiments described above to be performed.

For example, the processor 2010 may include a determination unit 2011, a control unit 2012, and a configuration unit 2013.

The determination unit 2011 may determine whether a maximum of 6 (or 9) to 32 serving cells can be configured in the terminal 2100 based on the capability information of the terminal. Here, the capability information of the terminal may include information on a frequency band that can be supported by the terminal, information on combinations of frequency bands in which CA is possible, information on a supportable bandwidth in each frequency band, and the like. In addition, the capability information of the terminal may include information indicating that a maximum of 6 (or 9) to 32 serving cells can be configured in the corresponding terminal. In addition, the determination unit 2011 may determine whether to activate/deactivate each serving cell configured in the terminal 2100.

When it is determined by the determination unit 2011 that up to 6 (or 9) to 32 serving cells can be configured in the terminal 2100, the control unit 2012 Control so that the activation/deactivation MAC CE according to the 7 embodiment is configured.

The configuration unit 2013 configures an activation/deactivation MAC CE under the control of the controller 2012 and configures a MAC PDU including the configured activation/deactivation MAC CE.

For example, according to the first embodiment, when the terminal has 9 or more serving cells, when at least one PUCCH secondary serving cell is configured in the terminal, the controller 1712 uses a separate RRC message to the terminal. When it is notified that the activation/deactivation MAC CE is to be transmitted, the activation/deactivation MAC CE of 32 bits as shown in FIG. 3(a) can be controlled to be configured. In other cases, the 8-bit activation/deactivation MAC CE as shown in FIG. 3(b) can be controlled to be configured.

In the case of the second embodiment, when at least one PUCCH secondary serving cell is configured in the terminal, the controller 2012 informs the terminal that the activation/deactivation MAC CE of a new format is to be transmitted through a separate RRC message. As shown in (a) and FIG. 7(b), it is possible to control to configure an activation/deactivation MAC CE having a variable length according to the number of PUCCH secondary serving cells. To this end, the control unit 202 may change the index of each secondary serving cell through an RRC connection reconfiguration procedure in advance. Alternatively, the format of the activation/deactivation MAC CE configured at this time is the activation/deactivation MAC CE having a length of 8 bits as shown in FIG. 3(b), or the maximum (sub ) Activation/deactivation MAC CE having a length of 16 to 32 bits may be used depending on the value of the serving cell index.

For example, when the maximum (sub) serving cell index value is 8 to 15, the activation/deactivation MAC CE has a length of 16 bits, and when the maximum (sub) serving cell index value is 16 to 23, the activation/deactivation MAC The CE has a length of 24 bits, and when the value of the maximum (sub) serving cell index is 24 to 31, the activation/deactivation MAC CE has a length of 32 bits.

According to the third embodiment, when the controller 2012 informs the terminal that the activation/deactivation MAC CE of the new format will be transmitted through a separate RRC message, as shown in FIGS. 10(a), 10(b), etc. Likewise, it is possible to control to configure activation/deactivation MAC CE for a single cell group having a variable length.

According to the fourth embodiment, the controller 2012 controls to configure an 8-bit activation/deactivation MAC CE as shown in FIGS. 12(a), 12(b), etc. based on the information on the cell group. The configured activation/deactivation MAC CE can be controlled to be transmitted through a corresponding primary serving cell or a PUCCH secondary serving cell.

According to the fifth embodiment, the control unit 2012 is based on the information on the cell group, the index of the primary serving cell (or PUCCH secondary serving cell), etc. The same 8-bit activation/deactivation MAC CE can be controlled to be configured and the configured activation/deactivation MAC CE can be controlled to be transmitted through a corresponding primary serving cell or a PUCCH secondary serving cell.

According to the sixth embodiment, the controller 2012 may control to configure an activation/deactivation MAC CE having a fixed length of 16 bits as illustrated in FIG. 16 and the like based on information on the cell group. In this case, an LCID for activation/deactivation MAC CE of a new format (LCID for activation/deactivation extended in Table 2) may be used.

According to the seventh and/or eighth embodiments, the controller 2012 configures an activation/deactivation MAC CE having a variable length as shown in FIGS. 17 and 18 based on the information on the cell group. Can be controlled. Even in this case, the LCID for activation/deactivation MAC CE of the new format (LCID for activation/deactivation extended in Table 2) may be used.

The memory 2030 may store capability information of the terminal according to the present specification, and may provide it to the processor 2010 according to the request of the processor 2010.

The terminal 2100 includes a radio frequency (RF) unit 2110, a processor 2120, and a memory 2130. The memory 2130 is connected to the processor 2120 and stores various information for driving the processor 2120. The RF unit 2110 is connected to the processor 2120 and transmits and/or receives a radio signal. The processor 2120 implements the functions, processes, and/or methods proposed in this specification. In the above-described embodiment, the operation of the terminal 2100 may be implemented by the processor 2120. The processor 2120 generates the capability information of the terminal published in this specification, and applies activation/deactivation for the corresponding secondary serving cell based on the activation/deactivation MAC CE received from the base station 2000.

For example, the processor 2120 may include a confirmation unit 2121 and an application unit 2122.

The verification unit 2121 is based on information on the cell group received from the base station 2000 and/or information indicating that the activation/deactivation MAC CE of a new format is to be transmitted, the format of the activation/deactivation MAC CE to be received later. can confirm.

The application unit 2121 may apply activation/deactivation to the corresponding secondary serving cells according to the activation/deactivation MAC CE received through the RF unit 2110 according to the result confirmed by the confirmation unit 2121.

Claims (21)

In a serving cell activation/deactivation method by a base station in a wireless communication system,
Configuring a secondary serving cell for a first terminal, wherein at least one serving cell index of the secondary serving cell for the first terminal is greater than 7;
Transmitting a first Radio Resource Control (RRC) message including first cell configuration information for the first terminal to the first terminal, wherein the first cell configuration information is the first among a maximum of 32 serving cells. Including configuration information of a serving cell index of the secondary serving cell for the terminal;
MAC of a 4-octet size for controlling the activation/deactivation state of the secondary serving cell configured for the first terminal based on at least one serving cell index of the secondary serving cell for the first terminal greater than 7 (Medium Access Control) setting a Control Element (CE);
Transmitting first activation/deactivation MAC information including a logical channel ID (LCID) associated with the 4-octet-sized MAC CE and the 4-octet-sized MAC CE to the first terminal, wherein the 4- MAC CE of octet size is associated with activation or deactivation of the secondary serving cell configured for the first terminal;
Configuring a secondary serving cell for a second terminal, wherein each serving cell index of the secondary serving cell for the second terminal is 7 or less;
Transmitting a second RRC message including second cell configuration information for the second terminal to the second terminal, wherein the second cell configuration information is the maximum of the 32 serving cells for the second terminal. Including configuration information of the serving cell index of the secondary serving cell;
MAC CE of 1-octet size for controlling the activation/deactivation state of the secondary serving cell configured for the second terminal based on each serving cell index of the secondary serving cell for the second terminal which is 7 or less Setting up; And
Transmitting second activation/deactivation MAC information including an LCID associated with the 1-octet-sized MAC CE and the 1-octet-sized MAC CE to the second terminal, wherein the 1-octet-sized MAC CE Is associated with activation or deactivation of the secondary serving cell configured for the second terminal,
Serving cell activation/deactivation method.
The method of claim 1,
The number of secondary serving cells configured for the first terminal is the same as the number of secondary serving cells configured for the second terminal,
Serving cell activation/deactivation method.
The method of claim 1,
Each of the number of secondary serving cells configured for the first terminal and the number of secondary serving cells configured for the second terminal is not greater than 7,
Serving cell activation/deactivation method.
The method of claim 1,
The value of the LCID associated with the 4-octet sized MAC CE is different from the value of the LCID associated with the 1-octet sized MAC CE,
Serving cell activation/deactivation method.
The method of claim 1,
The first terminal capability information including at least one of information on a frequency band supportable by the first terminal, information on a frequency band capable of carrier aggregation (CA), and information related to a bandwidth supportable within a frequency band. Further comprising the step of receiving from the terminal,
Serving cell activation/deactivation method.
In a serving cell activation/deactivation method by a terminal in a wireless communication system,
Configuring a secondary serving cell for the terminal from among up to 32 serving cells configurable for the terminal;
Receiving, by the terminal from a base station, a first Radio Resource Control (RRC) message including a serving cell index of the configured secondary serving cell, wherein each of the serving cell indexes is not greater than 7;
Based on the serving cell index not greater than 7, a first including a 1-octet sized MAC (Medium Access Control) CE (Control Element) and an LCID (Logical Channel ID) associated with the 1-octet sized MAC CE 1 determining activation/deactivation MAC information; And
Comprising the step of controlling, by the terminal, an activation or deactivation state of the configured secondary serving cell according to the determined first activation/deactivation MAC information,
Serving cell activation/deactivation method.
The method of claim 6,
Receiving, by the terminal, a second RRC message including a serving cell index greater than 7 of a secondary serving cell from the base station;
Determining second activation/deactivation MAC information including a 4-octet-sized MAC CE and an LCID associated with the 4-octet-sized MAC CE based on the serving cell index greater than 7; And
Including the step of controlling, by the terminal, the activation or deactivation state of the secondary serving cell according to the determined second activation/deactivation MAC information,
Serving cell activation/deactivation method.
The method of claim 7,
The number of configured secondary serving cells indicated by the first RRC message is the same as the number of secondary serving cells indicated by the second RRC message,
Serving cell activation/deactivation method.
The method of claim 7,
Each of the number of configured secondary serving cells indicated by the first RRC message and the number of secondary serving cells indicated by the second RRC message is not greater than 7,
Serving cell activation/deactivation method.
The method of claim 7,
The value of the LCID associated with the 4-octet sized MAC CE is different from the value of the LCID associated with the 1-octet sized MAC CE,
Serving cell activation/deactivation method.
The method of claim 6,
Further comprising the step of transmitting from the terminal terminal capability information indicating that the terminal supports the maximum of 32 serving cells,
Serving cell activation/deactivation method.
In a method for controlling activation of a serving cell by a terminal in a wireless communication system,
Receiving a Radio Resource Control (RRC) message from a base station;
Determining each of the serving cell indexes of the secondary serving cell configured for the terminal among the maximum 32 serving cells, wherein the determination includes whether each of the serving cell indexes is greater than 7;
Receiving a Medium Access Control (MAC) message from the base station;
From the received MAC message, based on the serving cell index of the secondary serving cell, corresponding to a 1-octet-sized MAC CE (Control Element) and an LCID (Logical Channel ID) associated with the 1-octet-sized MAC CE Determining MAC information corresponding to activation/deactivation MAC information, or a 4-octet-sized MAC CE and an LCID associated with the 4-octet-sized MAC CE; And
Including the step of controlling the activation or deactivation state of the secondary serving cell configured for the terminal,
Serving cell activation control method.
The method of claim 12,
Determining a serving cell index of a secondary serving cell configured for the terminal, wherein each of the serving cell indexes is not greater than 7 and the secondary serving cell is configured for the terminal among the maximum 32 serving cells; Determining activation/deactivation MAC information corresponding to a first format based on a determination that each of the serving cell indexes is not greater than 7; Determining a MAC CE of the 1-octet size based on the LCID associated with the first format; And controlling an activation or deactivation state of the secondary serving cell configured for the terminal based on the value of the 1-octet sized MAC CE.
Determining a serving cell index of another secondary serving cell configured for the terminal, wherein at least one of the serving cell indexes of the other secondary serving cell is greater than 7, and the other secondary serving cells serve the maximum of 32 Configured for the terminal among cells; Determining second activation/deactivation MAC information corresponding to a second format based on a determination that at least one of the serving cell indexes of the other secondary serving cell is greater than 7; Determining a MAC CE of the 4-octet size based on the LCID associated with the second format; And controlling an activation or deactivation state of the other secondary serving cell configured for the terminal based on the value of the MAC CE of the 4-octet size,
Serving cell activation control method.
The method of claim 13,
The number of configured secondary serving cells is the same as the number of other configured secondary serving cells,
Serving cell activation control method.
The method of claim 13,
Each of the number of configured secondary serving cells and the number of configured other secondary serving cells is not greater than 7,
Serving cell activation control method.
The method of claim 13,
The value of the LCID associated with the 4-octet sized MAC CE is different from the value of the LCID associated with the 1-octet sized MAC CE,
Serving cell activation control method.
The method of claim 12,
Transmitting terminal capability information indicating that the terminal supports the maximum of 32 serving cells from the terminal to the base station,
Serving cell activation control method.
The method of claim 12,
From the MAC header of the activation/deactivation MAC information, identifying whether the value of the LCID associated with the 4-octet sized MAC CE is different from the value of the LCID associated with the 1-octet sized MAC CE Further comprising,
Serving cell activation control method.
In the base station apparatus for activating/deactivating a serving cell in a wireless communication system,
Processor;
RF (Radio Frequency) unit; And
Includes memory,
The processor,
Configure a secondary serving cell for a first terminal, wherein at least one serving cell index of the secondary serving cell for the first terminal is greater than 7;
A first Radio Resource Control (RRC) message including first cell configuration information for the first UE is transmitted to the first UE through the RF unit, wherein the first cell configuration information is among a maximum of 32 serving cells. Including configuration information of a serving cell index of the secondary serving cell for the first terminal;
MAC of a 4-octet size for controlling the activation/deactivation state of the secondary serving cell configured for the first terminal based on at least one serving cell index of the secondary serving cell for the first terminal greater than 7 (Medium Access Control) CE (Control Element) is set;
The first activation/deactivation MAC information including the MAC CE of the 4-octet size and LCID (Logical Channel ID) associated with the MAC CE of the 4-octet size is transmitted to the first terminal through the RF unit, wherein The 4-octet sized MAC CE is associated with activation or deactivation of the secondary serving cell configured for the first terminal;
Configuring a secondary serving cell for a second terminal, wherein each serving cell index of the secondary serving cell for the second terminal is 7 or less;
A second RRC message including second cell configuration information for the second terminal is transmitted to the second terminal through the RF unit, wherein the second cell configuration information is the second terminal among the maximum 32 serving cells. Including the configuration information of the serving cell index of the secondary serving cell for;
MAC CE of 1-octet size for controlling the activation/deactivation state of the secondary serving cell configured for the second terminal based on each serving cell index of the secondary serving cell for the second terminal which is 7 or less To set; And
Configured to transmit second activation/deactivation MAC information including an LCID associated with the 1-octet sized MAC CE and the 1-octet sized MAC CE to the second terminal through the RF unit, wherein the 1- The octet sized MAC CE is associated with activation or deactivation of the secondary serving cell configured for the second terminal,
Serving cell activation/deactivation base station device.
In a terminal device for activating/deactivating a serving cell in a wireless communication system,
Processor;
RF (Radio Frequency) unit; And
Includes memory,
The processor,
Configuring a secondary serving cell for the terminal device from among up to 32 serving cells configurable for the terminal device;
A first Radio Resource Control (RRC) message including a serving cell index of a configured secondary serving cell is received from a base station through the RF unit, wherein each of the serving cell indexes is not greater than 7;
Based on the serving cell index not greater than 7, a first including a 1-octet sized MAC (Medium Access Control) CE (Control Element) and an LCID (Logical Channel ID) associated with the 1-octet sized MAC CE 1 determine activation/deactivation MAC information; And
Configured to control an activation or deactivation state of the configured secondary serving cell by the determined first activation/deactivation MAC information,
Serving cell activation/deactivation terminal device.
In a terminal device for controlling activation of a serving cell in a wireless communication system,
Processor;
RF (Radio Frequency) unit; And
Includes memory,
The processor,
Receiving a Radio Resource Control (RRC) message from a base station through the RF unit;
Each of the serving cell indexes of the secondary serving cell configured for the terminal device is determined among the maximum 32 serving cells, wherein the determination includes whether each of the serving cell indexes is greater than 7;
Receiving a medium access control (MAC) message from the base station through the RF unit;
From the received MAC message, based on the serving cell index of the secondary serving cell, corresponding to a 1-octet-sized MAC CE (Control Element) and an LCID (Logical Channel ID) associated with the 1-octet-sized MAC CE Determining activation/deactivation MAC information, or MAC information corresponding to a 4-octet-sized MAC CE and an LCID associated with the 4-octet-sized MAC CE; And
Configured to control an activation or deactivation state of a secondary serving cell configured for the terminal device,
Serving cell activation control terminal device.

Images