TW201624941A - Method of handling communication operation in communication system and related apparatus - Google Patents

Abstract

The disclosure proposes a method of handling communication operation in communication system and related apparatus. According to one of the exemplary embodiments, the disclosure proposes a method of handling a communication operation of a mobile device in a wireless communication system, applicable to the mobile device which is configured with a plurality of serving cells comprising a first serving cell and a second serving cell by a network of the wireless communication system. The method would include receiving a first transmission in a first subframe via the first serving cell and decoding the first transmission; generating a decoding result in response to decoding the first transmission; transmitting an acknowledgement (ACK) or negative-acknowledgement (NACK) in a second subframe, wherein the ACK or NACK corresponds to the decoding result; and receiving a second transmission in a third subframe via the second serving cell wherein the second transmission is a retransmission of the first transmission.

Description

Method for processing communication operation in communication system and related equipment

The present disclosure relates to a method of processing communication operations in a communication system and related devices.

The 3rd Generation Partnership Project (3GPP) Rel-8 standard and/or the 3GPP Rel-9 standard long-term evolution (LTE) communication system has been developed as a universal mobile communication system ( The successor of the universal mobile telecommunications system, UMTS), to further enhance the performance of UMTS and meet the increased needs of users. The LTE system will include an improved radio interface and an improved radio network architecture to provide high data rates, low latency, packet optimization, improved system capacity, and improved coverage relative to the predecessor.

1 illustrates a typical LTE system 100 in which a Radio Access Network (RAN) called an evolved Terrestrial Radio Access Network (E-UTRAN) will be included for use with One or more evolved Node-Bs (eNBs) 101 that communicate with one or more user equipment (UE) 102. The E-UTRAN can be used with the core network 103 including the Mobility Management Entity (MME) 104, the Serving Gateway (S-GW) 105, etc. for the non-access layer (Non Access Stratum, NAS). ) Controlled communication.

The LTE communication system currently has at least two available duplex mechanisms, which will include a frequency-division duplexing (FDD) mechanism and a time-division duplexing (TDD) mechanism. When FDD is implemented, the UE will be able to transmit and receive signals simultaneously on different carriers. When implementing TDD, the UE will be able to separate uplink and downlink transmissions in different time slots. In addition, TDD systems can provide flexible resource utilization through different TDD configurations.

Figure 2 illustrates seven different uplink/downlink (UL/DL) configurations currently implemented by an LTE communication system. Based on the flow characteristics, a different DL:UL ratio between 2:3 and 9:1 can be selected (as shown in Figure 2). In detail, any "U" (for example, 201) indicates that the subframe is a UL subframe for transmitting UL data, and any "D" (for example, 202) indicates that the subframe is used for transmitting DL. The DL sub-frame of the data, and any "S" (eg, 203) indicates that the sub-frame is a special sub-frame for transmitting control information and possibly data (depending on the configuration of the special sub-frame).

FIG. 3A illustrates a typical downlink subframe 300 of an LTE communication system. The downlink downlink frame 300 may include a physical downlink control channel (PDCCH) 301 and a physical downlink shared channel (PDSCH) 303. The PDSCH 303 is a data bearer channel assigned to a specific user. Downlink control information (DCI) 302 allocated within PDCCH 301 may indicate a downlink assignment. When the UE detects the downlink assignment in the subframe, the UE will receive the corresponding PDSCH in the same subframe. In general, the PDSCH is typically scheduled by a downlink assignment in the same subframe (as shown in Figure 3B).

The DCI 302 may indicate downlink resources in the PDSCH 303 to schedule downlink resources of hybrid automatic repeat request (HARQ) procedures. The DCI 302 may include a field indicating the number of downlink hybrid automatic repeat request (DL HARQ) procedures, wherein the maximum number of correlations of the DL HARQ procedure shown in FIG. 4A ( ). As can be seen in Figure 4A, (per carrier) It will be related to TDD/FDD duplex settings and/or TDD configuration operated by the communication device. For example, for FDD carrier 401, 402 will usually be set to 8. For TDD carrier 403 with UL/DL configurations 0, 1, 2, 3, 4, 5, and 6, 402 will be set to 4, 7, 10, 9, 12, 15, and 6, respectively. Therefore, according to the UL/DL configuration, for the FDD carrier 401, 3 bits in the DCI are required to represent a maximum of 8 HARQ programs, and for the TDD carrier 403, 4 bits in the DCI are required to represent multiple maximums of the HARQ program. number.

4B is a flow chart illustrating a current LTE HARQ retransmission procedure. In step S411a, the base station transmits the first transmission in the first subframe via the serving cell. In step S411b, the UE will receive the first transmission in the first subframe via the serving cell. In step S412, the UE will decode the first transmission. In step S413a, the UE will transmit an acknowledgment (ACK) or a negative acknowledgment (NACK) in the second subframe, wherein the acknowledgment or negative acknowledgment (ACK/NACK) corresponds to the decoding result. In step S413b, the base station will receive an ACK or NACK corresponding to the first transmission in the second subframe. In step S414a, the base station will transmit a second transmission in the third subframe via the serving cell, wherein the second transmission is a retransmission of the first transmission. In step S414b, the UE will receive the second transmission in the third subframe via the serving cell, wherein the second transmission is a retransmission of the first transmission. For the current LTE HARQ retransmission procedure, when the first transmission is transmitted in the serving cell, the second transmission will also be transmitted in the same serving cell.

FIG. 5A illustrates an example of a HARQ program in FDD mode. In general, support up to 8 DL HARQ programs in a conventional FDD system or = 8. In FIG. 5A, each of P0 to P7 represents each of 8 DL HARQ programs, respectively. The number of DL programs is indicated by the field "HARQ number" in the DCI, which is 3 bit fields for FDD and 4 bit fields for TDD. Referring to FIG. 5A, in step S501, assuming that the UE receives the first transmission of the DL HARQ procedure p0 in the subframe index 0, the UE transmits the first transmission phase with the DL HARQ procedure p0 when the subframe index is 4. Corresponding ACK/NACK. In step S502, assuming that the UE transmits a NACK corresponding to the first transmission of the DL HARQ procedure p0 in the subframe index 4, the UE may receive the DL HARQ procedure p0 in the subframe index 8 in step S503. Retransmission, where the first transmission and retransmission are received on the same serving cell.

In FIG. 5A, the UE may receive up to 8 DL HARQ procedures (P0 to P7) during the time between the first transmission and the retransmission. Therefore, in the conventional FDD system, the maximum number of DL HARQ programs is 8 ( = 8).

5B and 5C illustrate examples of HARQ programs in TDD mode UL/DL configuration 0 and in TDD mode UL/DL configuration 5, respectively. It is related to its UL/DL configuration. In FIG. 5B, the P0 to P3 numbers indicate each DL HARQ program when the maximum number of DL HARQ programs in the TDD mode UL/DL configuration 0 is 4; and in FIG. 5C, the number of P0 to P14 indicates in TDD UL The maximum number of DL HARQ programs in /DL configuration 5 is 15. In step S511, it is assumed that the UE receives the first transmission of the DL HARQ program p0 in the subframe index 0 of the radio frame m. In step S512, when the subframe index is 4, the UE transmits a NACK corresponding to the first transmission of the DL HARQ procedure p0 in the subframe configured for the uplink. However, the four subframes after the subframe index 4 are not the downlink subframes, so in step S513, the UE receives the retransmission of the DL HARQ program p0 in the subframe index 0 of the frame m+1. The first transmission and retransmission are received on the same serving cell.

In FIG. 5B, the UE may receive up to 4 DL HARQ procedures (P0 to P3) during the time between the first transmission and the retransmission. Therefore, if the UL/DL configuration is 0, the maximum number of DL HARQ programs in the conventional TDD system is 4 ( = 4).

Regarding the example shown in FIG. 5C, in step S521, it is assumed that the UE receives the first transmission of the DL HARQ program p0 in the subframe index 0 of the frame m. However, the four subframes after the subframe index 0 are not uplink subframes, so in step S522, the UE is in the next available uplink subframe (subframe index 2 of frame m+1). A NACK corresponding to the first transmission of the DL HARQ program p0 is transmitted. In step S523, the UE receives a retransmission of the DL HARQ procedure p0 in the subframe index 6 of frame m+1, wherein the first transmission and the retransmission are received on the same serving cell.

In FIG. 5C, the UE may receive up to 15 DL HARQ procedures (P0 to P14) during the time between the first transmission and the retransmission. Therefore, if the UL/DL configuration is 5, the maximum number of DL HARQ programs in the conventional TDD system is 15 ( = 15).

The advanced LTE (LTE-advanced, LTE-A) system (as its name suggests) is an upgrade of the LTE system's Rel-8 and Rel-9. The LTE-A system is designed to enable faster switching between power states, improve performance at the coverage edge of the eNB, and includes advanced technologies (eg, carrier aggregation (CA), coordinated multipoint (CoMP)). Transmission/reception, UL multiple-input multiple-output (MIMO) technology, etc. For UEs and eNBs that communicate with each other in an LTE-A system, the UE and the eNB may comply with standards developed for the LTE-A system, for example, the 3GPP Rel-10 standard or later.

A CA that can aggregate more than one carrier (eg, multiple component carriers, multiple serving cells) can be introduced into the LTE-A Rel-10 system and later technologies to achieve wider frequency band transmission. CA will increase bandwidth flexibility by aggregating multiple carriers. When the UE is configured with a CA, the UE has the capability to receive and/or transmit packets via one or more carriers to increase overall system throughput. FIG. 6A illustrates an example of an FDD CA scheme for aggregating two FDD DL serving cells, and FIG. 6B illustrates a TDD CA scheme for aggregating two TDD serving cells. Therefore, when the maximum bandwidth of 20 MHz corresponding to each service cell that is backward compatible with the 3GPP Rel-8 standard is available, the LTE-A system can support a wider bandwidth of up to 100 MHz by aggregating the maximum number of five serving cells. . The LTE-A system supports CA for two consecutive and non-continuous service cells, where each serving cell is limited to a maximum of 110 resource blocks. CA will therefore increase bandwidth flexibility by aggregating service cells.

When the UE is configured with a CA, the UE has the capability to receive and/or transmit packets via one or more serving cells (or configured multiple component carriers (CCs)) to increase its transmission throughput. If the FDD mode is implemented in the LTE-A system, it is possible for the eNB to configure the UE to a different number of uplink (UL) and downlink (DL) serving cells. Otherwise, if the TDD mode is implemented in the LTE-A system, it is possible for the eNB to configure the UE with different TDD UL/DL configurations for different serving cells.

In addition, the serving cells configured for the UE will typically include one or only one DL primary serving cell (DL PCell) and one or only one UL primary serving cell (UL PCell) in FDD mode. . Regarding operation in the TDD mode, a UE configured for a serving cell will typically include one or only one PCell and one or more secondary serving cells (SCells). The number of configured SCells is arbitrary and will typically be related to the UE's UL and/or DL aggregation capabilities and available radio resources.

Hybrid Automatic Repeat reQuest (HARQ) procedures have been employed in LTE systems to provide efficient and reliable communication. Because it is different from the Automatic Repeat ReQuest (ARQ) program, the HARQ program has adopted a forward correcting code (FEC). For example, assuming that the mobile device has correctly decoded the packet, the mobile device can feed back a positive acknowledgment (ACK) to inform the network that the mobile device has correctly received the packet. Conversely, if the mobile device is unable to correctly decode the packet, the mobile device can give a negative acknowledgement (NACK) to the network. In the case that the UE has received the NACK, the UE may store some or all of the received data packets in the soft buffer of the UE.

The soft buffer area of the UE can be determined by soft channel bits (soft channel bits, The total number of indications varies and varies with its UE class as illustrated in FIG. A detailed description of the specific operations associated with FIG. 7 is described in 3GPP TS 36.306, incorporated by reference, ie, "E-UTRA ; User Equipment (UE) radio access capabilities (version 12). ". In response to receiving a retransmission packet from a wireless transmitter of another wireless node, the UE may combine the retransmission packet with the soft value of the stored packet. The UE's receiver can decode the packet by using the combined soft value. In addition, the combination of one or more previously erroneously received packets and the currently received packets will increase the probability of successful decoding. The UE will continue the HARQ procedure until the packet is correctly decoded or until the maximum number of retransmissions have been sent. When the maximum number of retransmissions is reached, the HARQ procedure will fail and thus the UE may allow the ARQ procedure of the Radio Link Control (RCC) to be attempted again. In other words, the space of the soft scratchpad will be reserved for the HARQ program so that the UE can store the results of the HARQ program that has not been correctly decoded. Otherwise, if the soft scratchpad is fully occupied, HARQ may be blocked. When multiple packets are transmitted to the UE, the UE will typically need to store multiple HARQ programs due to unsuccessful attempts to decode the packets.

As described previously, in the LTE/LTE-A system, the UE can store a maximum of 8 HARQ programs per soft cell in the soft temporary storage area. Each HARQ program can carry at least one packet. The packet may be, for example, a Transport Block (TB) in an LTE system. A transport block is a data unit that is transmitted from an eNB (e.g., 101) to at least one UE (e.g., 102) on a PDSCH (e.g., 303) in an LTE radio frame. Each LTE radio frame has a period of 1 millisecond (ms). Each LTE radio frame is 10 ms and contains 10 LTE radio frames. When operating under multiple input multiple output (MIMO) methods (eg, spatial multiplexing), more than one transport block may be transmitted for each transmission time interval (TTI) of the UE. Therefore, the soft temporary storage area partitioning method in a network including at least one serving cell will be explained below.

Please refer to FIG. 4A and FIG. 7 for the following description. According to 3GPP TS 36.213 incorporated by reference, ie, "E-UTRA; Physical layer procedures (version 12)", You can divide multiple partitions according to the following equation to store soft channel bits: (Equation 1)

For a clearer description, for FDD, TDD, and FDD-TDD, if the UE is configured with more than one serving cell or if the UE is configured with a Secondary Cell Group (SCG), then for each serving cell, and for at least Transmitting a block, after detecting that the decoding of the coded block of the transport block fails, the UE may store the corresponding range to at least The received soft channel bit of a soft channel bit, where: Is the number of code blocks of the transport block (TB). Is the size of the code block of the transport block (TB). Is the maximum number of transport blocks that can be transmitted to the UE in the TTI of the serving cell. Is a positive value equal to 8. It is the maximum number of DL HARQ programs as shown in FIG.

If the UE is configured with SCG, then Is the number of serving cells configured across both the Mandatory Cell Group (MCG) and the Secondary Cell Group (SCG); otherwise, Is the number of service cells configured.

Is comparison with And return with The smaller of the values.

Figure 8 illustrates the steps of a conventional soft scratchpad partitioning method. As shown in Equation 1, when the UE is configured with more than one serving cell or if the UE is configured with a secondary cell group (SCG), the soft temporary storage area will be allocated to each configured serving cell and/or each cell group group. The soft staging area is divided according to the following steps:

In step S801, the UE will determine the total number of soft channel bits ( And the number of DL serving cells ( ).

In step S802, if the UE is configured to Service cells, the UE can distinguish the entire soft temporary storage into soft temporary storage areas for each service cell. a sub-block, wherein the size of each sub-block of the soft temporary storage area is .

In step S803, the UE may further divide each sub-block of the soft temporary storage area into a HARQ program. Partitions, where the size of each partition used for the HARQ program is .

For example, if the UE is configured to Service cells, the soft temporary storage area is divided Serving cells. In other words, if the UE is configured to Service cells, you can divide the entire soft temporary storage into Each sub-block is given to each serving cell, wherein each sub-block of the soft temporary storage area has the size of. For each serving cell, up to The HARQ program can be stored in the soft temporary storage area, and the size of the soft temporary storage area of each HARQ program is at least Soft channel bits. In addition, for each transport block within the HARQ program, the size of the soft buffer area of each HARQ program is at least Soft channel bits.

The application of the concept of Figure 8 shown in Figure 9, which illustrates the steps of a conventional soft temporary storage zone partition with 3 DL serving cells (one DL PCell and two DL SCells) in an FDD system, and thus Equal to 3. In this FDD example, for each DL serving cell, Equal to 8, and configure the transmit diversity to the UE; therefore Set to 1. Referring to FIG. 8 and FIG. 9 together, the soft temporary storage area is divided as follows. In step S801, the UE will determine the total number of soft channel bits (eg, 905) ( And the number of DL serving cells (for example, ). In step S802, if the UE is configured to three serving cells, the UE may divide the entire soft temporary storage into three sub-blocks of the soft temporary storage area (for example, 902, 903, 904) for each serving cell. The size of each sub-block of the soft temporary storage area is . In step S803, the UE may further divide each sub-block of the soft temporary storage area into 8 partitions for the HARQ program, wherein the size of each partition (for example, 901) for the HARQ program is .

Referring to FIG. 9, if the UE is configured to three serving cells, the UE divides the entire soft temporary storage into three sub-blocks of the soft temporary storage area, which includes the first sub-block 902 for each serving cell, The second sub-block 903 and the third sub-block 904. Each sub-block of the soft temporary storage area is divided into 8 partitions for the HARQ program (for example, divided into 1-1 to 1-8 for the first sub-block 902, and 2-1 to the second sub-block 903). 2-8, divided into 3-1 to 3-8 for the third sub-block 904, wherein the size of each partition for the HARQ program is . The first sub-block 902 can be used for the PCell, the second sub-block 903 can be used for the first SCell, and the third sub-block 904 can be used for the second SCell.

As an application of FIG. 8, FIG. 10 illustrates the steps of a conventional soft scratchpad partition having three TDD service cells in a TDD system. In this example, the 3 TDD serving cells will contain a PCell with UL/DL configuration 0 and two SCells with UL/DL configuration 5, and thus Equal to 3. In this example, for PCell and SCell, Equal to 4 and 15, respectively. And configure the transmit diversity to the UE; therefore Set to 1. Referring to FIG. 8 and FIG. 10 together, the soft temporary storage area is divided as follows. In step S801, the UE will determine the total number of soft channel bits (eg, 1006) ( And the number of DL serving cells (for example, ). In step S802, if the UE is configured as three serving cells, the UE may divide the entire soft temporary storage into three sub-blocks of the soft temporary storage area (for example, 1003, 1004, 1005) for each serving cell, wherein The size of each sub-block of the soft buffer is . In step S803, the UE may further divide each sub-block of the soft temporary storage area into a HARQ program. Partitions (for example, 1001, 1002), where the size of each partition used for the HARQ program is . For PCell, the size of each partition (for example, 1001) used for the HARQ program is . For SCell, the size of each partition (for example, 1002) used for the HARQ program is .

Referring to FIG. 10, if the UE is configured as three serving cells, the entire soft temporary storage area 1006 is divided into three sub-blocks of the soft temporary storage area (the first sub-block 1003 and the second sub-block for each serving cell). 1004 and the third sub-block 1005). For the PCell, the sub-block of the soft temporary storage area is divided into four partitions for the HARQ program (divided into 1-1 to 1-4 for the first sub-block 1003), where the size of each partition for the HARQ program is used. for . For the SCell, the sub-blocks of the soft temporary storage area are divided into 8 partitions for the HARQ program (divided into 2-1 to 2-8 for the second sub-block 1004, and 3-1 to the third sub-block 1005). 3-8), where the size of each partition used for the HARQ program is . The first sub-block 1003 will be used for the PCell, the second sub-block 1004 will be used for the first SCell, and the third sub-block 1005 will be used for the second SCell.

Figure 11 illustrates a conventional DL HARQ ACK or NACK (ACK/NACK) feedback timeline in an FDD system. For the FDD system, the UE responds to the subframe Transmitting HARQ ACK/NACK feedback in at least one PDSCH transmission to report DL HARQ transmission, where by subframe The corresponding DL control channel (for example, a Physical Downlink Control Channel (PDCCH) or an Enhanced Physical Downlink Control Channel (ePDCCH)) indicates a DL HARQ transmission. As shown in Figure 11, the ACK/NACK response will be transmitted in the 4th subframe after the initial transmission.

Regarding the TDD single serving cell system, the downlink association set index for TDD in FIG. 12 will be applied. Where M is the number of elements in the downlink association set and the downlink association set index includes at least one element. A detailed description of the application of Fig. 12 can be observed in Table 10.1.3.1-1 in TS 36.213 incorporated by reference. In essence, the UE will respond to the subframe Transmitting at least one PDSCH in 1202 and transmitting HARQ ACK or NACK (ACK/NACK) feedback to transmit in the subframe The corresponding DL control channel (for example, a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (ePDCCH)) is reported as the indicated DL HARQ transmission, wherein And related to its UL/DL configuration 1201 of serving cells. Briefly, with configuration 0 as an example, the UE will transmit DL HARQ ACK/NACK feedback in subframe index 1202 n = 4 in response to receiving the transmission in subframe index 0 (4 - 4 = 0). Similarly, the UE will respond to receive transmissions in subframe index 1 (ie, 7 – 6 = 1) and subframe index 5 (ie, 9 – 4 = 5), respectively, in subframe indices 7 and 9. Transmit HARQ ACK/NACK feedback.

FIG. 13A illustrates a DL HARQ ACK or NACK (ACK/NACK) feedback timeline in a TDD single serving cell system configured with UL/DL configuration 0. Referring to both FIG. 12 and FIG. 13A, the UE will respond to the subframe. At least one physical DL Shared Channel (PDSCH) transmission and DL HARQ ACK/NACK feedback to report DL HARQ transmission, where the subframe is in the subframe A corresponding DL control channel (eg, a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (ePDCCH)) indicates a DL HARQ transmission, where And related to its UL / DL configuration 0. In this example, the UE will be in the frame DL HARQ ACK/NACK feedback in subframe 4, 7 or 9 for reporting by the frame The DL HARQ transmission indicated by the corresponding DL control channel (for example, the physical downlink control channel (PDCCH) or the enhanced physical downlink control channel (ePDCCH)) in the subframe 0, 1 or 5. Subsequently, the UE will be in the frame DL HARQ ACK/NACK feedback in subframe 2 for reporting by the frame The DL HARQ transmission indicated by the corresponding DL control channel (for example, the Physical Downlink Control Channel (PDCCH) or the Enhanced Physical Downlink Control Channel (ePDCCH) in the subframe 6.

In the example illustrated in Figure 13, the transmission of HARQ ACK/NACK will be delayed due to the absence of uplink subframes within the four subframes. The special subframe "S" will be treated as a downlink subframe. A similar concept would apply to the DL HARQ ACK/NACK feedback timeline in a TDD single serving cell system configured with UL/DL configuration 1 as illustrated in Figure 13B.

FIG. 13C illustrates a DL HARQ ACK or NACK (ACK/NACK) feedback timeline in a TDD single serving cell system configured with UL/DL configuration 5. For Figure 13C, the UE will respond to the subframe Transmitting DL HARQ ACK/NACK feedback for at least one PDSCH transmission in order to report by subframe a DL HARQ transmission indicated by a corresponding DL control channel (eg, a Physical Downlink Control Channel (PDCCH) or an Enhanced Physical Downlink Control Channel (ePDCCH)), wherein And related to its UL / DL configuration 5. In this example, the UE should be in the frame DL HARQ ACK/NACK feedback in subframe 2 for reporting by the frame DL HARQ transmission indicated by the corresponding DL control channel (for example, physical downlink control channel (PDCCH) or enhanced physical downlink control channel (ePDCCH)) in the subframe 9 and by the frame DL indicated by the corresponding DL control channel (for example, the physical downlink control channel (PDCCH) or the enhanced physical downlink control channel (ePDCCH)) in the subframe 0/1/3/4/5/6/7/8 HARQ transmission.

For a TDD inter-band CA case, at least one SCell may be configured to be a different UL/DL configuration than the PCell. In this particular case, for serving cells , the UE can respond to the subframe At least one entity DL shared channel (PDSCH) transmission and transmitting DL HARQ ACK or NACK (ACK/NACK) feedback for reporting by the subframe a DL HARQ transmission indicated by a control channel (for example, a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (ePDCCH)) corresponding to the DL, where And related to the DL-reference UL/DL configuration of the serving cell, wherein Is the downlink association set of serving cells c. Further, determination will be made below according to its DL-reference UL/DL configuration. .

For PCell, the DL-reference UL/DL configuration is the UL/DL configuration of the PCell. For SCell, the DL-reference UL/DL configuration is determined according to FIG. 14 illustrates a different set 1401 of DL-reference UL/DL configurations 1403 for serving cells based on one or more pairs formed by primary cell UL/DL configuration and secondary cell UL/DL configuration 1402.

As an example, FIG. 15 illustrates a DL HARQ ACK or NACK (ACK/NACK) feedback timeline in which the PCell 1501 is configured with UL/DL configuration 0 and the SCell 1502 is configured with UL/DL configuration 5 in the TDD CA system. Therefore, as shown in FIG. 15, the DL-reference UL/DL configuration of the PCell 1501 is UL/DL configuration 0 and the DL-reference configuration of the SCell 1502 is the UL/DL configuration 5. Since the DL HARQ ACK/NACK feedback time axis is determined according to the DL-reference UL/DL configuration of the serving cell, the DL HARQ ACK/NACK feedback time axes of the PCell and SCell are UL/DL configurations 0 and 5, respectively. Because different UL/DL configurations are configured as different serving cells, DL HARQ ACK/NACK feedback corresponding to the same subframe can be transmitted on different subframes according to the corresponding DL-reference UL/DL configuration. In the case of Figure 15, since the UE can be in the frame of two serving cells Receive the DL HARQ program in subframe 0, so the UE can be in the frame The corresponding DL HARQ ACK/NACK feedback of the DL HARQ program of the PCell is transmitted on the subframe 4, and the UE can be in the frame. The corresponding DL HARQ ACK/NACK feedback of the DL HARQ program of the SCell is transmitted on the subframe 2.

The present disclosure provides a method and related apparatus for handling communication operations in a communication system.

In one of the exemplary embodiments, the present disclosure proposes a method of processing a communication operation in a communication system and related devices. According to one of the exemplary embodiments, the present disclosure provides a method for a mobile device to handle a communication operation in a wireless communication system, the method being applicable to a mobile device configured with a plurality of service cells through a network of a wireless communication system, The plurality of service cells include a first serving cell and a second serving cell. The method will include receiving, by a first serving cell, a first transmission in a first subframe and decoding the first transmission; generating a decoding result in response to decoding the first transmission; in the second subframe a transmission acknowledgement (ACK) or a negative acknowledgement (NACK), wherein the ACK or NACK (ACK/NACK) corresponds to the decoding result; and the second transmission is received in the third subframe via the second serving cell, wherein the second transmission Is the retransmission of the first transmission.

In one of the exemplary embodiments, the present disclosure proposes a method for a mobile device to handle a communication operation in the wireless communication system for a network of a wireless communication system, the method being adapted to configure a plurality of service cells to A network of mobile devices, the plurality of serving cells including a first serving cell and a second serving cell. The method will include transmitting a first transmission in a first subframe via a first serving cell; receiving an acknowledgment (ACK) or a negative acknowledgment (NACK) in a second subframe, wherein ACK or NACK (ACK/NACK) Corresponding to the first transmission; and transmitting the second transmission in the third subframe via the second serving cell, wherein the second transmission is a retransmission of the first transmission.

The above described features and advantages of the invention will be apparent from the following description.

It should be understood, however, that the disclosure is not intended to be limited or limited by the invention. Moreover, the present disclosure will include modifications and modifications obvious to those skilled in the art.

Reference will now be made in detail to the exemplary embodiments embodiments Wherever possible, the same reference numerals are used in the drawings

For traditional CA technology, each service cell is deployed on a licensed spectrum that supports non-competitive communication. With enhanced CA, data offload and coexistence with other unlicensed spectrum deployments are more important for future LTE deployments to handle increased throughput and capacity requirements. Thus, by enhancing the CA, at least one serving cell can be deployed on an unlicensed band that supports contention based communication and at least one service cell is deployed on a licensed band that supports non-competitive communication. Unlicensed spectrum is also known as free spectrum, for example, the Industrial, Scientific and Medical (ISM) band and any other radio that is not currently dedicated. As shown in FIG. 16A, an overall scheme utilizing both licensed spectrum and unlicensed spectrum is referred to as Licensed-Assisted Access (LAA) using LTE.

16B illustrates a method of processing a communication operation by a mobile device in a proposed wireless communication system, which is applicable to a mobile device. The mobile device can be configured with a plurality of service cells through a network of the wireless communication system, the plurality of service cells including the first serving cell and the second serving cell. In step S1601, the mobile device will receive the first transmission in the first subframe via the first serving cell and decode the first transmission. In step S1602, the mobile device will generate a decoding result in response to decoding the first transmission. In step S1603, the mobile device will transmit an acknowledgment (ACK) or a negative acknowledgment (NACK) in the second subframe, where ACK or NACK (ACK/NACK) corresponds to the decoding result. In step S1604, the mobile device will receive the second transmission in the third subframe via the second serving cell, wherein the second transmission is a retransmission of the first transmission.

The method of processing communication operations in the proposed communication system includes four exemplary embodiments. The first exemplary embodiment relates to cross-carrier HARQ retransmission. A second exemplary embodiment relates to determining a combination based on a serving cell . The third exemplary embodiment provides specific details regarding soft scratchpad partitioning. The fourth exemplary embodiment determines a HARQ acknowledgment (ACK)/negative acknowledgment (NACK) feedback timeline in response to the first transmission of step S1602.

According to a first exemplary embodiment, the first serving cell may be an authorized serving cell or an unauthorized serving cell. The second serving cell can be an authorized service cell or an unauthorized service cell. The first serving cell and the second serving cell may be the same or different. The second subframe may be after the first subframe; and the third subframe may be after the second subframe. The proposed method of FIG. 16B may further include storing the at least one soft channel bit of the first transmission in at least one partition of the soft temporary storage area if the first transmission is not successfully decoded.

According to the second exemplary embodiment of the present disclosure, according to the first of the authorized service cells And second of unauthorised service cells Combination determination , when the authorized service cell and the unauthorized service cell operate independently, first And second Both are the maximum number of downlink HARQ procedures.

According to the second exemplary embodiment of the present disclosure, when the unauthorized service cell and the authorized service cell are in the LAA group, for the unauthorized service cell and the authorized service cell, the same.

According to the second exemplary embodiment of the present disclosure, if the authorized service cell is a frequency domain duplexing (FDD) DL serving cell and the unauthorised serving cell is a full DL serving cell, then Is 16 and is indicated in the downlink control indicator (DCI) The field is 4 bits.

According to the second exemplary embodiment of the present disclosure, if the LAA group further includes the second unlicensed full DL serving cell, then It is 24 and the field in the DCI is 5 bits.

According to the second exemplary embodiment of the present disclosure, if both the authorized service cell and the unauthorized service cell are configured with UL/DL configuration 0, then Is 8 and is indicated in the DCI The field is 3 bits.

According to the second exemplary embodiment of the present disclosure, if the UL/DL configuration 5 is configured to both the authorized service cell and the unauthorized service cell, then Is 30 and is indicated in the DCI The field is 5 bits.

According to the second exemplary embodiment of the present disclosure, if UL/DL configuration 0 is configured to an authorized serving cell and UL/DL configuration 5 is configured to an unauthorized serving cell, then Is 13 and is indicated in the DCI The field is 4 bits.

According to the second exemplary embodiment of the present disclosure, if UL/DL configuration 0 is configured to an authorized serving cell and the authorized serving cell is a full DL serving cell, then Is 14 and is indicated in the DCI The field is 4 bits.

According to the second exemplary embodiment of the present disclosure, if the authorization service cell is configured as an FDD DL serving cell and the UL/DL configuration 0 is configured to an unauthorized serving cell, then Is 12 and is indicated in the DCI The field is 4 bits.

According to the third exemplary embodiment of the present disclosure, for each HARQ program, according to Divide each sub-block into multiple partitions, where Is to use with The smaller of them and the larger one.

According to the third exemplary embodiment of the present disclosure, each partition in each transport bolck for each HARQ program has at least The soft channel bit size.

According to the third exemplary embodiment of the present disclosure, it is determined according to whether the authorized service cell assists the unauthorized service cell . Specifically, if the authorized service cell assists the unauthorised serving cell, then Will be 12; otherwise Will be 8.

According to the third exemplary embodiment of the present disclosure, the number of unauthorized service cells configured to the mobile device is determined . Specifically, if the number of unauthorized service cells configured for the mobile device is 1, 2, or ≥ 3, respectively, It is 12, 16 or 20.

According to the third exemplary embodiment of the present disclosure, the traffic load category of the unauthorised serving cell is determined . Specifically, if the traffic load categories of unauthorized service cells are high, medium, and low, respectively, Will be 16, 12 and 8.

According to the third exemplary embodiment of the present disclosure, the congestion rate of the unauthorised serving cells is determined . Specifically, if the rate of unauthorised service cells is high, medium, and low, then It is 8, 12 and 16.

According to a third exemplary embodiment of the present disclosure, the arrangement of traffic load categories of at least one unauthorized service cell and the number of at least one configured unauthorized service cell are determined .

According to the third exemplary embodiment of the present disclosure, it is assumed that the first authorized serving cell operates on the first component carrier (CC #1), the unlicensed serving cell operates on the third component carrier (CC #3), and the mobile device further configures The second authorized serving cell is operating on the second component carrier (CC#2), and the first authorized serving cell, the second authorized serving cell, and the unauthorized serving cell are part of the LAA group, at this time CC#2 and CC# 2 Share the same sub-block of the soft temporary storage area.

According to the fourth exemplary embodiment of the present disclosure, if the subframe n is DL for both the authorized serving cell and the unauthorized serving cell, the HARQ transmission corresponding to the subframe n is moved by the same UL subframe. Device transmission.

According to the fourth exemplary embodiment of the present disclosure, the DL HARQ transmission corresponding to the DL subframe of the unlicensed serving cell is distributed as evenly as possible on the UL subframe of the unauthorized serving cell.

According to the fourth exemplary embodiment of the present disclosure, the DL HARQ transmission corresponding to the DL subframe n of the unlicensed serving cell is transmitted on the uplink subframe closest to the subframe n+c, where c is a constant, For example, 4.

According to the fourth exemplary embodiment of the present disclosure, if the UL/DL configuration 0 is configured to the authorized service cell and the UL/DL configuration 5 is configured to the unauthorized service cell, if the first HARQ transmission is in the subframe of the frame m The second downlink corresponding to the first HARQ transmission occurs in the subframe 6 or 7 of the frame m-1.

According to the fourth exemplary embodiment of the present disclosure, if the second HARQ transmission occurs in the subframe 3 of the frame m, the second downlink corresponding to the second HARQ transmission is in the subframe m-1 Occurs in block 7 or 8.

According to the fourth exemplary embodiment of the present disclosure, if the third HARQ transmission occurs in the subframe 4 of the frame m, the second downlink corresponding to the third HARQ transmission is in the subframe m-1 Occurs in box 0.

Figure 16C illustrates the proposed mobile device that will implement the proposed method of processing communication operations in the disclosed communication system as shown in Figure 16B and correspondingly written thereto. From a hardware perspective, a mobile device (e.g., a UE) may be represented by, without limitation, the functional elements as illustrated in Figure 16C. Referring to Figure 16C, mobile device 1600 will include at least, but not limited to, a processor and/or controller 1601 (hereinafter referred to as "processor 1601"), one or more digits/class ratios (D/A)/analog/ Digital (A/D) converters 1602a through 1602c, optionally LTE-U transmitter (TX) 1603a and LTE-U receiver (RX) 1603b, Wi-Fi TX 1604a and Wi-Fi RX 1604b, LTE TX 1605a And LTE RX 1605b, memory module 1606, and antenna 1607 (or antenna array).

The processor 1601 is configured to process digital signals and execute a program for processing the methods proposed for communication operations in a communication system as described herein. In addition, the processor 1601 can be coupled to the memory module 1606 (eg, the LTE-U protocol module 1606a, the Wi-Fi protocol module 1606b, and the LTE protocol module 1606c) to store software programs, code, device configurations, and code. This, temporary or permanent data, etc. The processor 1601 is configured to access and execute the modules recorded in the memory module 1606. The function of the processor 1601 can be implemented by using a programmable unit such as a microprocessor, a microcontroller, a digital signal processor (DSP) chip, or a Field Programmable Gate Array (FPGA). The functions of the processor 1601 can also be implemented by a separate electronic device or IC, and the functions performed by the processor 1601 can also be implemented in the hardware or software field.

The LTE-U protocol module 1606a will support the LTE-U protocol. This means that the processor 1601 executing the LTE-U protocol module 1606a converts the digital information into a format compatible with the LTE-U protocol and can access, for example, an Evolved Universal Terrestrial Radio. Cellular networks such as Access Network, E-UTRAN). The Wi-Fi Protocol Module 1606b will support the 802.11 (or Wi-Fi) protocol. This means that the processor 1601 executing the Wi-Fi protocol module 1606b will convert the digital information into a format compatible with the Wi-Fi protocol according to the IEEE 802.11 standard or the like (for example, IEEE 802.11x), and can access the wireless Wireless Local Access Network (WLAN). The LTE protocol module 1606c will support the LTE protocol. This means that the processor 1601 executing the LTE protocol module 1606c converts the digital information into a format compatible with the LTE protocol and can access a cellular network such as E-UTRAN. It should be noted that the LTE protocol module 1606c can optionally be combined with a 3G and/or 2G protocol module.

The D/A/A/D converters 1602a through 1602c are configured to convert from an analog signal format to a digital signal format during uplink signal processing and from a digital signal format to an analog signal format during downlink signal processing.

In unlicensed spectrum (eg 5 GHz, 2.4 GHz, other Industrial, Scientific and Medical (ISM) radio bands, or unlicensed National Information Infrastructure (U-NII) bands) The LTE-U TX 1603a and the LTE-U RX 1603b are used to transmit and receive modulated signals, respectively, which may be wireless RF signals for the LTE-U protocol module 1606a (through one or more antennas) 1607). Wi-Fi TX 1604a and Wi-Fi RX 1604b operating at the unlicensed spectrum are used to transmit and receive modulated signals, respectively, which may be wireless RF signals for Wi-Fi protocol module 1606b (through One or more antennas 1607). The unlicensed spectrum operated by LTE-U TX 1603a, LTE-U RX 1603b, Wi-Fi TX 1604a, and Wi-Fi RX 1604b may be the same or different. LTE TX 1605a and LTE RX 1605b operating at the licensed spectrum (eg, band 700 MHz, 850 MHz, 1800 MHz, 1900 MHz, 2100 MHz, etc.) are used to transmit and receive modulated signals, respectively, which may be used The wireless RF signal (through one or more antennas 1607) of the LTE protocol module 1606c. LTE-U TX 1603a and LTE-U RX 1603b, Wi-Fi TX 1604a and Wi-Fi RX 1604b, and LTE TX 1605a and LTE RX 1605b may also perform, for example, low noise amplification, impedance matching, mixing, upsampling or down. Frequency conversion, filtering, amplification, etc.

The memory module 1606 can be a fixed or removable device in any possible form (including a non-transitory computer readable recording medium), such as a random access memory (RAM), read only memory (Read) -Only Memory, ROM), flash memory or other similar device, or a combination of the above.

The Wi-Fi device in the disclosure may represent various embodiments, which may include, but are not limited to, a desktop computer, a laptop computer, a computer, a server, a client, a workstation, and a personal digital assistant ( Personal Digital Assistant, PDA), Personal Computer (PC), scanner, telephone device, pager, camera, television, handheld video game device, music device, wireless sensor, etc. In some applications, the Wi-Fi device can be a fixed computer device that operates in a mobile environment (eg, a bus, train, airplane, boat, car, etc.).

A base station (e.g., an eNB) will have similar hardware components as a mobile device, including, without limitation, a processor, a storage medium or memory, an A/D D/A complex, a wireless transmitter, a wireless receiver, an antenna array, and the like. The functions of these elements are similar to those of mobile devices and will therefore not be repeated.

In order to operate using LTE under the LAA, the communication system will be required to comply with its regulatory requirements. In particular, for transmissions over unlicensed bands, contention-based communications have a limitation of maximum transmission time. For conventional CA operations, there is no limit to the maximum transmission time per service cell in any non-contention based communication. However, for CAs in LTE-LAA, at least one serving cell has a maximum transmission time limit in contention-based communications because at least one serving cell will be deployed on the unlicensed spectrum. For example, Europe has a Frame-Based-Equipment (FBE)-based Listen-Before-Talk (LBT) requirement that requires a maximum channel occupancy time or a maximum burst length of less than 10 milliseconds ( Ms), also requires maximum channel occupancy time or maximum burst length less than 13ms. Japan requires a maximum channel occupancy time of less than 4 ms in 5 GHz, which is more stringent. It can be seen that regulatory requirements will lead to system design changes.

If more than one serving cell (at least one serving cell is deployed on the licensed spectrum and at least one serving cell is deployed on the unlicensed spectrum) is configured for the UE, several items need to be processed. In one of the exemplary embodiments, if the non-contention-based authorization service cell assists at least one unauthorized service cell based on the contention transmission, the authorized and unauthorized service cells may be considered to be authorized access (licensed- Assisted access (LAA) group, which may be defined as an authorized service cell that assists at least one unauthorised serving cell. In this case, the authorized service cell and the unauthorized service cell can be considered to be a licensed-assisted access (LAA) setting.

16D illustrates the proposed method of processing a communication operation by a mobile device in a wireless communication system suitable for use in a network in accordance with an exemplary embodiment of the present disclosure. The network of the wireless communication system configures a plurality of service cells to the mobile device, the plurality of service cells including the first serving cell and the second serving cell. In step S1651, the network will transmit the first transmission in the first subframe via the first serving cell. In step S1652, the network will receive an acknowledgment (ACK) or a negative acknowledgment (NACK) in the second subframe, wherein the acknowledgment or negative acknowledgment (ACK/NACK) corresponds to the first transmission. In step S1653, the network will transmit a second transmission in the third subframe via the second serving cell, wherein the second transmission is a retransmission of the first transmission.

In a first exemplary embodiment, the first serving cell may be an authorized serving cell or an unauthorized serving cell. The second serving cell can be an authorized service cell or an unauthorized service cell. The first serving cell and the second serving cell may be the same or different. The second subframe may be after the first subframe; and the third subframe may be after the second subframe.

In a second exemplary embodiment, if more than one serving cell (at least one serving cell is deployed on the licensed spectrum and at least one serving cell is deployed on the unlicensed spectrum) is configured for the UE, the maximum number of DL HARQ procedures will be modified ( ). For legacy systems, each serving cell will have its own maximum number when it individually transmits its DL HARQ program ( ) DL HARQ program. One difference between the present disclosure and the traditional CA mechanism is that if an authorized service cell operating under non-contention based transmission assists at least one unauthorized serving cell operating on a contention based transmission, then transmitting on the unlicensed serving cell The DL HARQ procedure may be an independent DL HARQ procedure for unauthorized service cells and/or an auxiliary DL HARQ procedure for authorizing service cells. Therefore, unauthorized service cells should not have the maximum value of the independent DL HARQ program ( And the maximum number of DL HARQ procedures for the LAA group should be considered together with the Authorized Service Cell and the Unauthorized Service Cell. In addition, the number of bits used to indicate the number of DL HARQ programs can also be extended for the LAA group. 17A-17G and its corresponding written description will provide several examples of the second exemplary embodiment.

In the following example of the second exemplary embodiment, the first transmission may be transmitted via an authorized service cell or an unauthorized service cell. And the retransmission can also be transmitted via the authorized service cell or the unauthorized service cell.

Figure 17A illustrates a first example when an authorized FDD service cell assists an unlicensed full DL serving cell with an LAA group having a maximum number of DL HARQ procedures ( ). In this example, since the FDD DL service cell 1701 is authorized Will be considered together with the unlicensed full DL serving cell 1702, so the maximum number of DL HARQ procedures for the LAA group will be the maximum number of DL HARQ procedures for the unlicensed full DL serving cell 1702 plus the DL HARQ of the authorized FDD DL serving cell 1701 The maximum number of programs. Since the maximum number of DL HARQ procedures independently used for serving cells 1701 and 1702 according to FIG. 4 is 8, the maximum number of DL HARQ procedures of the LAA group ( ) will increase from 8 to 16. Therefore, since the number of bits (3 bits) for indicating the number of DL HARQ programs of the conventional FDD system will cover only 8 programs and thus is insufficient, the number of bits used to indicate the number of DL HARQ programs will also Extend from 3 bits to 4 bits.

17B is a second example illustrating when an authorized FDD service cell assists two unlicensed full DL serving cells, the LAA group having the maximum number of DL HARQ procedures ( ). In this example, similar to the principle of Figure 17A, the maximum number of DL HARQ procedures for the LAA group ( Will be considered together with the authorized FDD service cell and the unlicensed full DL service cell, which will contain the authorized FDD DL serving cell 1711, the first unlicensed full DL serving cell 1712 and the second unlicensed full DL serving cell 1713, and Figure 4A is used independently for the maximum value of all serving cells It is 8, so the maximum number of DL HARQ programs for the LAA group is extended from 8 to 24. Therefore, since the number of bits (3 bits) for indicating the number of DL HARQ programs of the conventional FDD system is insufficient, 5 bits are required to fully represent 24 possibilities, so the DL HARQ program for indicating the LAA group is used. The number of bits in the number should also be extended from 3 bits to 5 bits.

Figure 17C is a third example illustrating when a TDD service cell is authorized to assist an unauthorised TDD serving cell, the LAA group having the maximum number of DL HARQ procedures ( ), wherein the two serving cells are configured with UL/DL configuration 0. In this example, the maximum number of DL HARQ procedures for the LAA group ( Will be considered together with the Authorized Service Cell 1721 and the Unauthorized Serving Cell 1722, and because it is used independently for the Authorized Serving Cell 1721 and the Unauthorized Serving Cell 1722 It is 4, so the maximum number of DL HARQ programs for the LAA group is extended from 4 to 8 (4 + 4 = 8). For a conventional TDD system, the number of bits used to indicate the number of DL HARQ programs is 4 bits. In this example, since 4 bits are sufficient to indicate a maximum of 8 DL HARQ programs, the number of bits used to indicate the number of DL HARQ programs of the LAA group is not modified.

Figure 17D is a fourth example illustrating when a TDD service cell is authorized to assist an unauthorised TDD serving cell, the LAA group having the maximum number of DL HARQ procedures ( ), wherein the two serving cells are configured with a UL/DL configuration 5. In this example, the maximum number of DL HARQ procedures for the LAA group ( ) will be considered together with the Authorized Service Cell 1731 and the Unauthorized Serving Cell 1732. Since the maximum value for both the authorized service cell 1731 and the unauthorized service cell 1732 is independently used according to FIG. It is 15, so the maximum number of DL HARQ programs for the LAA group will be extended from 15 to 30 (15 + 15 = 30). Therefore, since the number of bits (4 bits) for indicating the number of DL HARQ programs of the conventional TDD system is insufficient, 5 bits are required to represent 30 possibilities, so the number of DL HARQ programs for indicating the LAA group is used. The number of bits should also be extended from 4 bits to 5 bits.

Figure 17E is a fifth example illustrating when a TDD serving cell is authorized to assist an unauthorised TDD serving cell, the LAA group having the maximum number of DL HARQ procedures ( ), wherein the authorized TDD service cell is configured with UL/DL configuration 0 and the unlicensed TDD service cell is configured with UL/DL configuration 5. In this example, the maximum number of DL HARQ procedures for the LAA group ( ) will be considered together with the Authorized Service Cell 1741 and the Unauthorized Serving Cell 1742. For the exemplary embodiment of FIG. 17E, the Authorization Service Cell 1741 will make an ACK or NACK (ACK/NACK) in subframe 4 of frame m after receiving the DL HARQ procedure in subframe 0 of frame m. Respond. The fastest retransmission of this particular DL HARQ procedure will occur in subframe 0 of frame m+1 of the Authorized Serving Cell 1741. Within 10 subframes (from subframe 0 to subframe 9 of frame m), there may be a maximum of 13 DL HARQ procedures containing 4 DL HARQ procedures and unauthorized services for the authorized serving cell 1741. Nine DL HARQ programs for cells 1742. LAA group in this exemplary embodiment Yes (4 + 9) = 13.

17F is a sixth example illustrating when an authorized TDD serving cell 1751 configured with UL/DL configuration 0 assists an unlicensed full DL serving cell 1752, the LAA group having the maximum number of DL HARQ procedures ( ). In this example, for authorizing service cell 1751 and unauthorized service cell 1752 The addition is always 14 (4 + 10 = 14). Therefore, the maximum number of DL HARQ programs is extended from 4 to 14 which can be represented by 4 bits.

Figure 17G is a seventh example illustrating when the authorized FDD service cell 1761 assists in configuring an unlicensed serving cell 1762 with UL/DL configuration 0, the LAA group having the maximum number of DL HARQ procedures ( ). In this example, the authorization service cell 1761 and the unauthorized service cell 1762 are used. The addition is always 12 (8 + 4 = 12). Therefore, the maximum number of DL HARQ programs is extended from 4 to 12 bits which can be represented by 4 bits.

For the third exemplary embodiment, if more than one serving cell (at least one serving cell is deployed on the licensed spectrum and at least one serving cell is deployed on the unlicensed spectrum) is configured for the UE, the soft temporary storage area of FIG. 8 will be modified. Partitioning rules. For legacy systems, the soft temporary storage area is divided independently for each serving cell, and thus each serving cell has a dedicated sub-block of the soft temporary storage area. One difference between the traditional CA mechanism and the present disclosure is the premise that unauthorized service cells are based on contention transmission and can limit the maximum transmission time on unauthorized service cells. Furthermore, the DL HARQ procedure transmitted on the unlicensed serving cell may be an independent DL HARQ procedure for the unlicensed serving cell and/or an auxiliary DL HARQ procedure for the authorized serving cell. In this way, the unlicensed service cell will not have a dedicated sub-block of the soft buffer area, and the LAA group should share the sub-block of the soft buffer area (eg, the LAA group's authorized and unauthorized service cell sharing soft) The same sub-block of the temporary storage area). Therefore, the soft cell is configured for the UE when more than one serving cell is configured for the UE or if at least one serving cell and/or the cell group is deployed on the unlicensed band (Secondary Cell Group, SCG) It will be divided according to the number of authorized service cells. Subsequently, when more than one serving cell is configured for the UE or if at least one serving cell and/or a group of cells deployed on the unlicensed band is configured for the UE, the soft buffer will be partitioned according to the steps illustrated in FIG. .

In step S1801, the soft temporary storage area is divided into a plurality of partitions according to the number of the plurality of partitions, wherein the size of the soft temporary storage area is .

In step S1802, according to at least the number of authorized service cells configured for the UE ( ), the maximum number of DL HARQ programs ( ) and comparison parameters ( ) Determine the number of multiple partitions.

Can be determined based on the DL-reference UL/DL configuration of the authorized service cell Parameters, and/or if the authorization service cell assists at least one unauthorized service cell, may be determined according to a mechanism as proposed in the second exemplary embodiment .

Is a constant or configurable parameter. This disclosure proposes to modify from a traditional system based on the following content .

If the authorized service cell assists at least one unauthorized service cell, then Can be set equal to ,among them . For example, as shown in FIG. 19A, if it is determined that the authorized service cell assists at least one unauthorized service cell 1901, then Equal to 12; otherwise Equal to 8.

It is also possible to determine the number of unauthorised serving cells in the LAA group 1902 (( )determine . For example, as shown in FIG. 19B, if the number of unauthorized service cells 1902 in the LAA group is 1, then Is 12; if the number of unauthorized service cells in the LAA group is 1902 is 2, then Is 16; and if the number of unauthorized service cells 1902 in the LAA group is greater than or equal to 3, then It is 20.

High-level signaling (for example, Radio Resource Control (RRC), System Information Block (SIB) or Master Information Block (MIB)) or physical layer can be transmitted through the network. Signaling (for example, Downlink Control Information (DCI)) for configuration.

Can also be determined based on the traffic load of the LAA group . For example, as shown in FIG. 19C, it may be determined according to the traffic load 1903 of the unlicensed serving cell of the LAA group. . If the traffic load 1903 of the unlicensed serving cell of the LAA group belongs to the highest category (eg, high 1904), then Is set to 16; if the traffic load 1903 of the unlicensed service cell of the LAA group belongs to the medium category (for example, 1905), then Is set to 12; if the traffic load 1903 of the unlicensed serving cell of the LAA group belongs to the lowest category (eg, 1906 lower), then It is set to 8.

The traffic load of the unlicensed service cells of the LAA group and the number of unauthorized service cells of the LAA group can also be determined by combining the concepts of FIG. 19B and FIG. 19C. . The combination diagram shown in Fig. 19D. The utilization of this figure is a combination of FIG. 19B and FIG. 19C and thus a description will not be required.

It can also be determined based on the occlusion rate of unauthorized service cells in the LAA group. . It can be decided according to Fig. 19E. If the rate of unauthorised service cells in the LAA group is high, then Is set to 8; if the congestion rate of the unlicensed service cells of the LAA group is medium, then Is set to 12; if the congestion rate of unlicensed service cells in the LAA group is low, then It is set to 16.

As an example, if Authorized service cells and The unlicensed service cells are configured to the UE, and the soft temporary storage is divided into multiple partitions, wherein Determine the size of multiple partitions, where Is the size of the soft temporary storage area, Is the number of authorized service cells configured as UEs, Is the maximum number of DL HARQ programs, Is comparing parameters and Is the maximum number of transport blocks that can be transmitted to the UE in the TTI of the serving cell. For each authorized service cell and/or LAA group, up to The HARQ program can be stored in the soft temporary storage area, and the soft temporary storage area size for each HARQ program is at least Soft channel bits, in addition, for each transport block within the HARQ program, the soft scratchpad size for each HARQ program is Soft channel bits.

E.g, You can divide into multiple partitions for storing soft channel bits according to the following equation: Equation 2

For FDD, TDD, and FDD-TDD, if more than one serving cell is configured to the UE or if the SCG is configured to the UE, for each serving cell, for at least Transfer block, after the decoding of the code block of the transfer block fails, the UE should store the corresponding range to at least The received soft channel bit of a soft channel bit, where: Is the number of coded blocks of the transport block (TB). Is the size of the code block of the transport block (TB). Is the maximum number of transport blocks that can be transmitted to the UE in the TTI of the serving cell. It is a positive value as previously introduced. Is determined according to the DL-reference UL/DL configuration of the authorized serving cell, and/or the DL HARQ procedure determined according to the value introduced in the second exemplary embodiment in the case where the authorized serving cell assists at least one unauthorized serving cell The maximum number. Is the number of authorized service cells configured across the mandatory cell group (MCG) and the SCG if the UE is configured with SCG; otherwise, Is the number of authorized service cells configured. Is comparison with And return with The smaller of the values, Return no more than The largest integer.

20 through 23 illustrate various examples of the third proposed exemplary embodiment. Figure 20 illustrates that when the UE is configured with two authorized TDD service cells as shown in Figure 20 as component carriers (CC) #1 and CC#2 ( =2) and an unlicensed TDD service cell is CC#3 ( =1), a first example of a third exemplary embodiment of a soft scratchpad partition, wherein one of the plurality of authorized TDD service cells assists an unauthorized TDD serving cell. The authorized TDD service cell CC#2 and the unlicensed service cell CC#3 together form an LAA group. In this example, the maximum number of DL HARQ procedures is determined according to the DL-reference UL/DL configuration of the authorized serving cell ( ). Since each serving cell is configured with UL/DL configuration 0, the DL-reference UL/DL configuration of the authorized serving cell is UL/DL configuration 0. In other words, the LAA group Determined according to UL/DL configuration 0 and equal to 4 for authorized service cells. Therefore, the soft temporary storage area is divided by applying the concept of FIG.

In step S1801, the soft temporary storage area is divided into a plurality of partitions according to the number of the plurality of partitions, wherein the size of the soft temporary storage area is .

In step S1802, at least according to the number of authorized service cells ( ), the maximum number of DL HARQ programs ( = 4) and comparison parameters ( ) Determine the number of multiple partitions. In addition, soft temporary storage is divided into soft temporary storage areas. Sub-blocks. And each sub-block of the soft temporary storage area is divided into HARQ programs. Partitions, where each partition for the HARQ program has a size , in this instance, according to the authorized service cell ( DL-reference UL/DL configuration determines the LAA group . In this example, Equal to 8. Therefore, each partition used for the HARQ program has a size . Due to the soft temporary storage area partition, the entire soft temporary storage is divided into 8 partitions, wherein partitions 1-1, 1-2, 1-3 and 1-4 are used for CC#1 and partitions 2-1, 2-2, 2 -3 and 2-4 are shared between CC#2 and CC#3.

Figure 21 illustrates when the UE is configured with two authorized TDD service cells as CC#1 and CC#2 ( = 2) and an unlicensed TDD service cell for CC#3 ( = 1), a second example of a third exemplary embodiment of a soft scratchpad partition, wherein one of the plurality of authorized TDD service cells assists the unauthorised TDD service cell and authorizes the TDD service cell CC#2 and is not authorized The TDD serving cell CC#3 forms a LAA group. In this example, if the authorization service cell assists the unauthorised serving cell, the maximum number of DL HARQ procedures of the LAA group is determined according to the value introduced in the second exemplary embodiment ( ). Since each serving cell is configured with UL/DL configuration 0, the maximum number of DL HARQ procedures for authorizing the serving cell CC#1 will be determined according to its DL-reference UL/DL configuration ( And the maximum number of DL HARQ procedures of the LAA group (CC#2 and CC#3) will be determined according to the example illustrated in FIG. 17C ( ). In other words, for CC#1, = 4, and for the LAA group (CC#2 and CC#3), = 8. Therefore, the soft temporary storage area is divided by applying the concept of FIG. 18 as follows.

In step 1801, at least one sub-block of the soft temporary storage area is divided into a plurality of partitions according to the number of the plurality of partitions.

In step S1802, at least according to the number of authorized service cells ( ), the maximum number of DL HARQ programs ( ) and parameters ( ) Determine the number of multiple partitions. In addition, soft temporary storage is divided into soft temporary storage areas. Sub-blocks. And each sub-block of the soft temporary storage area is divided into HARQ programs. Partitions, where each partition for the HARQ program has a size , in this example, for CC#1, =4 and for the LAA group (CC#2 and CC#3), =8. In this example, Equal to 8. Therefore, for CC#1, each partition used for the HARQ program has a size . For the LAA group (CC#2 and CC#3), each partition for the HARQ program has a size . As a result of the partition, partitions 1-1, 1-2, 1-3, and 1-4 are allocated for CC#1, and partitions 2-1, 2-2, 2-3, 2-4, 2-5, 2-6, 2-7, and 2-8 are allocated for CC#2 and CC#3 and are shared between CC#2 and CC#3. Authorized service cells and unauthorized service cells will share the same partition space.

Figure 22 illustrates that when the UE is configured with two authorized FDD service cells, CC#1 and CC#2 ( = 2) and unauthorized full DL service cells are CC#3 ( =1), a third example of the third exemplary embodiment of the soft scratchpad partition. In this example, if the authorization service cell assists the unauthorised serving cell, the maximum number of DL HARQ procedures of the LAA group is determined according to the value introduced in the second exemplary embodiment ( Therefore, the maximum number of DL HARQ procedures for authorizing service cells CC#1 and LAA groups (CC#2 and CC#3) is determined according to the rules of FDD as shown in FIG. 4 ( ). In other words, for CC#1 and LAA groups (CC#2 and CC#3), = 8. Therefore, the soft temporary storage area is divided by applying the concept of FIG.

In step S1801, the soft temporary storage area is divided into a plurality of partitions according to the number of the plurality of partitions, wherein the size of the soft temporary storage area is .

In step S1802, at least according to the number of authorized service cells ( ), the maximum number of DL HARQ programs ( ) and comparison parameters ( ) Determine the number of multiple partitions. In addition, soft temporary storage is divided into soft temporary storage areas. Sub-blocks. And each sub-block of the soft temporary storage area is divided into HARQ programs. Partitions, where each partition for the HARQ program has a size , in this example, for CC#1 and LAA groups (CC#2 and CC#3), =8. In this example, Equal to 8. Therefore, for CC#1, each partition used for the HARQ program has a size . For the LAA group (CC#2 and CC#3), each partition for the HARQ program has a size . As a result of the partition, partitions 1-1, 1-2, 1-3, 1-4, 1-5, 1-6, 1-7, and 1-8 are allocated for CC#1, and partition 2-1, 2-2, 2-3, 2-4, 2-5, 2-6, 2-7, and 2-8 are allocated for CC#2 and CC#3 and are shared between CC#2 and CC#3. Authorized service cells and unauthorized service cells will share the same partition space.

Figure 23 illustrates when the UE is configured with two authorized FDD service cells as CC#1 and CC#2 ( = 2) and an unauthorized full DL service cell for CC#3 ( = 1), a fourth example of the third exemplary embodiment of the soft scratchpad partition. In this example, if the authorization service cell assists the unauthorised serving cell, the maximum number of DL HARQ procedures of the LAA group is determined according to the value introduced in the second exemplary embodiment ( And, therefore, determine the maximum number of DL HARQ procedures for authorizing the serving cell CC#1 according to the rules of FDD as shown in FIG. 4A ( And determining the maximum number of DL HARQ procedures for the LAA groups (CC #2 and CC #3) according to the illustrated example of FIG. 17A ( ). In other words, for CC#1, =8, and for the LAA group (CC#2 and CC#3), =16. Therefore, the soft temporary storage area is divided by applying the concept of FIG.

In step S1801, the soft temporary storage area is divided into a plurality of partitions according to the number of the plurality of partitions, wherein the size of the soft temporary storage area is .

In step S1802, at least according to the number of authorized service cells ( ), the maximum number of DL HARQ programs ( ) and comparison parameters ( ) Determine the number of multiple partitions. In addition, soft temporary storage is divided into soft temporary storage areas. Sub-blocks. And each sub-block of the soft temporary storage area is divided into HARQ programs. Partitions, where each partition for the HARQ program has a size , which for CC#1, = 8 and for the LAA group (CC#2 and CC#3), =16. In this example, it is determined according to Figure 19A . So for CC#1, Equal to 8 and for LAA groups (CC#2 and CC#3), Equal to 12.

Therefore, each partition used for the HARQ program has a size .

For CC#1, the partition size is .

For LAA groups (CC#2 and CC#3), the partition size is . As a result of the partition, partitions 1-1, 1-2, 1-3, 1-4, 1-5, 1-6, 1-7, and 1-8 are allocated for CC#1, and partition 2-1, 2, 2, 2-3, 2-4, 2-5, 2-6, 2-7, 2-8, 2-9, 2-10, 2-11, and 2-12 are allocated for CC#2 and CC#3 is shared between CC#2 and CC#3. Authorized service cells and unauthorized service cells will share the same partition space.

The present disclosure proposes a fourth exemplary embodiment of determining a HARQ ACK or NACK (ACK/NACK) feedback timeline. In the prior art, the UE may transmit the PDSCH HARQ ACK/NACK in the subframe number n to report the PDSCH transmission indicated by the corresponding PDCCH in the subframe number nk, where And k is a positive integer as stated in Table 10.1.3.1-1 in TS 36.213. For serving cell C, the UE will transmit the PDSCH HARQ ACK/NACK in subframe n to report the PDSCH transmission indicated by the corresponding PDCCH in subframe nk, where . Determined according to its DL-reference UL-DL configuration and subframe number . For PCell, the DL-reference UL/DL configuration is the configuration of the PCell. For SCell, the DL-reference UL/DL configuration is determined according to Table 10.2-1 in TS 36.213. The DL-reference UL/DL configuration for serving cells based on a pair formed by the primary cell UL/DL configuration and the secondary cell UL/DL configuration is set forth in Table 10.2-1 in TS 36.213. For example, when two service cells configured with the UL/DL configuration 0 and the SCell configured with the UL/DL configuration 5 are configured to the UE, the PDSCH HARQ ACK/NACK for the PCell follows the UL/DL configuration 0, and for the SCell The PDSCH HARQ ACK/NACK feedback timeline follows the UL/DL configuration. However, in order to facilitate the feedback of DL HARQ ACK/NACK and to rebalance the uplink control overhead, the present disclosure proposes a DL HARQ ACK/NACK feedback timeline for modifying the LAA group and modifying the existing downlink of each UL/DL configuration. A new guideline for path association set indexing.

In the fourth exemplary embodiment, if the retransmission can be transmitted in another serving cell, the DL hybrid automatic response request acknowledgement or negative acknowledgement (HARQ ACK or NACK) feedback time axis will be modified.

For a legacy CA system, a DL HARQ ACK or NACK (ACK/NACK) feedback timeline corresponding to a DL HARQ procedure that has been received in the serving cell is determined according to the DL-reference UL/DL configuration of the serving unit. If at least one serving cell is configured with a different UL/DL configuration, then at least one serving cell will have a different DL-reference UL/DL configuration. In this way, the DL HARQ ACK/NACK feedback timeline for PCell and SCell can be different for a traditional TDD CA system. For the fourth exemplary embodiment, since different UL/DL configurations are configured for different serving cells, DL HARQ ACK/NACK feedback corresponding to the same subframe may be transmitted on different subframes.

A difference between the fourth exemplary embodiment and the conventional CA mechanism is that if the non-contention based authorization service cell assists at least one unauthorized service cell based on contention, the DL HARQ procedure transmitted on the unlicensed serving cell It may be an independent DL HARQ procedure for unauthorized service cells and/or a secondary DL HARQ procedure for authorizing service cells. Therefore, for the LAA group, DL HARQ ACK/NACK feedback corresponding to the same subframe is expected to be transmitted on the same subframe. Thus, although more than one serving cell is configured for the UE or if a secondary cell group (SCG) that deploys at least one serving cell and/or cell group on the unlicensed band is configured for the UE, the DL HARQ ACK/NACK of the LAA group The feedback timeline will be modified accordingly according to the following three rules:

The first rule is if the sub-frame Is a downlink subframe for both authorized and unlicensed serving cells, and the corresponding DL HARQ ACK/NACK feedback is transmitted by the UE in the same UL subframe.

The second rule is that the DL HARQ ACK/NACK corresponding to the DL subframe of the unlicensed serving cell is distributed as evenly as possible on the UL subframe of the authorized serving cell.

The third rule is the DL subframe with the unauthorised serving cell Corresponding DL HARQ ACK/NACK feedback is closest to the subframe On the uplink subframe, where Is a constant, for example, = 4.

24 illustrates an application of the above rule in an example of the DL HARQ ACK/NACK feedback timeline of the proposed fourth exemplary embodiment, which is assumed to have an authorized service cell configured with UL/DL configuration 0 and configured with UL /DL configuration 5 of the TDD CA system for unauthorized service cells. Therefore, the DL-reference UL/DL configuration of the authorized serving cell is UL/DL configuration 0 and the DL-reference configuration of the unlicensed serving cell is determined by the downlink association set index as shown in FIG. 25, which is the downlink A modified version of the associated collection index chart. In one embodiment, since the UE can be in the frame of two serving cells Receive the DL HARQ program in subframe 0, so the UE can be in the frame On the subframe 4, the DL HARQ ACK/NACK feedback corresponding to the DL HARQ procedure of the two serving cells is transmitted.

It may be noted that the proposed DL HARQ ACK/NACK feedback timeline for unlicensed serving cells in the LAA group is different from the conventional cross-band CA communication system. In the conventional cross-band CA communication system, if the downlink is received in the subframe 9 of the frame m-1 and the subframes 0, 1, 3, 4, 5, 6, 7, 8 of the frame m For transmission, the corresponding ACK/NACK will be transmitted only in subframe 2 of frame m+1. For the DL HARQ ACK/NACK feedback timeline 2401 of the Authorized Service Cell, the PDSCH HARQ ACK/NACK feedback timeline follows UL/DL Configuration 0, as shown in FIG. However, according to the fourth exemplary embodiment, the DL HARQ ACK/NACK feedback time axis 2402 of the unlicensed serving cells is different. In FIG. 24, if a HARQ ACK/NACK is transmitted in the subframe index 2 of the frame m, the corresponding downlink transmission will be received in the subframe 6 and/or 7 of the frame m-1; If the HARQ ACK/NACK is transmitted in the subframe index 3 of the frame m, the corresponding downlink transmission will be received in the subframe 8 and/or 9 of the frame m-1; if the subframe is in the frame m If the HARQ ACK/NACK is transmitted in the frame index 4, the downlink transmission will be received in the subframe 0 of the frame m; if the HARQ ACK/NACK is transmitted in the subframe 8 of the frame m, The subframe 3 and/or 4 of the frame m receive the corresponding downlink transmission; and if the HARQ ACK/NACK is transmitted in the subframe index 9 of the frame m, the subframe of the frame m will be 5 receives the corresponding downlink transmission.

Thus, for unlicensed serving cells in the LAA group, the DL HARQ ACK/NACK feedback timeline can be modified according to the above rules, wherein the DL HARQ ACK/NACK feedback timeline is determined from the downlink association set index. For UEs configured with at least one authorized TDD serving cell and at least one unlicensed TDD serving cell, the UE will respond to the subframe Transmitting at least one DL PDSCH and transmitting DL HARQ ACK/NACK feedback to report by subframe a DL HARQ transmission indicated by a corresponding DL control channel (eg, PDCCH or ePDCCH), where And related to the UL/DL configuration of unauthorized service cells and Pertaining to the UL/DL configuration of the authorized service cell. For example, when configuring TDD UL/DL When configured to authorize service cells, Determine the downlink association set index of the unauthorised service cell. In general, when UL/DL configurations 0, 1, 2, 3, 4, 5, and 6 are configured for authorized service cells, the application of the above three rules will require a downlink association set index ( )to modify. The modifications shown in the figure below.

Figure 26 illustrates the downlink association set index when the grant service cell is configured with UL/DL configuration 1. . Figure 27 illustrates the downlink association set index when the authorization service cell is configured with UL/DL configuration 2. . Figure 28 illustrates the downlink association set index when the authorization service cell is configured with UL/DL configuration 3. . Figure 29 illustrates the downlink association set index when the authorization service cell is configured with UL/DL configuration 4. . Figure 30 illustrates the downlink association set index when the authorization service cell is configured with UL/DL configuration 5. . Figure 31 illustrates the downlink association set index when the authorization service cell is configured with UL/DL configuration 6. .

For enhanced CA, data offload and coexistence with other unlicensed spectrum deployments will become increasingly important for future LTE deployments to handle increased throughput and capacity requirements. Thus, for enhanced CA, at least one service cell is deployed on an unlicensed band that supports contention based communication and at least one service cell is deployed on a licensed band that supports non-contention based communication (eg, LTE-LAA). The present disclosure provides a mechanism to fulfill the implementation of the communication operation of the LTE-LAA.

In view of the foregoing description, the present disclosure is suitable for use in a wireless communication system and can provide a method of handling communication operations in a communication system. Authorized and unauthorized service cells may be considered to be a Licensed-Assisted Access (LAA) group if the authorized service cell assists at least one unauthorized service cell.

In the first of the proposed exemplary embodiments, the present disclosure proposes that retransmission can be transmitted on one of the configured service cells of the LAA group.

In the second of the proposed exemplary embodiments, the present disclosure proposes a maximum number of DL HARQ procedures that collectively consider the LAA group.

In a third of the proposed exemplary embodiments, a soft temporary storage partitioning mechanism is proposed for sharing authorized and unauthorized service cells of the same sub-block of the soft temporary storage area. In this way, the partition of the soft scratchpad can operate efficiently and can increase the performance of HARQ retransmission.

In the fourth proposed exemplary embodiment, the DL HARQ ACK or NACK (ACK/NACK) feedback time axis of the LAA group and the corresponding downlink association set index are modified. In this way, feedback of DL HARQ ACK/NACK will occur as soon as possible and the uplink control overhead will be properly equalized.

The elements, acts, or instructions in the specific embodiments of the disclosed embodiments of the present application should not be construed as being critical or essential to the present disclosure unless explicitly described. Moreover, as used herein, the indefinite article "a" and "an" If only one item is desired, the term "single" or similar language will be used. Further, as used herein, the term "any of" preceding a plurality of items and/or a list of a plurality of item categories is intended to include the item and/or item type individually or in combination with other items and/or Or any of the other item categories "anything", "any combination", "any of the plurality", and/or any combination of the plurality. Moreover, as used herein, the term "set" is intended to encompass any number of projects, including zero. Also, as used herein, the term "number" is intended to include any number, including zero.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧LTE system
101‧‧‧Evolved Node B (eNodeB)
102‧‧‧User equipment
103‧‧‧core network
104‧‧‧Mobility Management Entity (MME)
105‧‧‧Service Gateway (S-GW)
201‧‧‧Uplink subframe (U)
202‧‧‧Down subframe (D)
203‧‧‧Special subframe (S)
300‧‧‧Downlink subframe
301‧‧‧Physical downlink control channel
303‧‧‧ Physical downlink shared channel
401‧‧ Divided Duplex (FDD)
402‧‧‧Maximum number of downlink HARQ procedures
403‧‧‧Time Division Duplex (TDD)
902‧‧‧1st sub-block
903‧‧‧2nd sub-block
904‧‧‧3rd sub-block
1003‧‧‧1st sub-block
1004‧‧‧2nd sub-block
1005‧‧‧3rd sub-block
1601‧‧‧Processor/Controller
1201‧‧‧Uplink/downlink configuration
1202‧‧‧ subframe number n
1401‧‧‧ Collection#
1402‧‧‧ (primary cell uplink/downlink configuration, secondary cell uplink/downlink configuration)
1403‧‧‧Downlink-reference uplink/downlink configuration
1602a-1602c‧‧‧Digital/Analog Converter/A/D Converter
1603a‧‧‧LTE-U transmitter
1603b‧‧‧LTE-U Receiver
1604a‧‧ Wi-Fi transmitter
1604b‧‧ Wi-Fi Receiver
1605a‧‧‧LTE transmitter
1605b‧‧‧LTE receiver
1606‧‧‧Memory Module
1607‧‧‧Antenna
1606a‧‧‧LTE-U protocol module
1606b‧‧‧Wi-Fi Protocol Module
1606c‧‧‧LTE Protocol Module
1701‧‧‧ Authorized FDD DL service cells
1702‧‧‧Unauthorized full DL service cells
1711‧‧‧ Authorized FDD DL service cells
1712‧‧‧First unauthorized full DL service cell
1713‧‧‧Second unauthorized full DL service cell
1721, 1731, 1741, 1751, 1761‧‧ ‧ authorized service cells
1722, 1732, 1742, 1752, 1762‧‧‧ Unauthorized service cells
1901‧‧‧ Authorized service cells assist at least one unauthorized service cell
Number of unauthorized service cells in the 1902‧‧‧LAA group
Traffic load of unauthorised service cells in the 1903‧‧‧LAA group

The drawings are included to provide a further understanding of the present disclosure, and are incorporated in this specification and constitute a part of this specification. The drawings illustrate embodiments of the present disclosure, and together with the description, explain the principles of the disclosure. FIG. 1 is a block diagram illustrating a typical LTE communication system as an example. Figure 2 illustrates a plurality of UL/DL configurations currently implemented through an LTE communication system. FIG. 3A illustrates the use of Downlink Control Information (DCI) to schedule downlink resources in a typical LTE communication system. Figure 3B illustrates the PDSCH scheduling timeline in a typical LTE communication system. 4A illustrates the maximum number of DL HARQ programs and the number of bits used to indicate the number of DL HARQ procedures for TDD and FDD duplex modes. FIG. 4B illustrates a current LTE HARQ ACK or NACK (ACK/NACK) feedback procedure. FIG. 5A illustrates an example of the maximum number of DL HARQ programs in the FDD mode. FIG. 5B illustrates an example of the maximum number of DL HARQ programs in TDD mode in UL/DL configuration 0. FIG. 5C illustrates an example of the maximum number of DL HARQ programs in the TDD mode in the UL/DL configuration 5. FIG. 6A illustrates an example of CA in FDD mode. FIG. 6B illustrates an example of CA in TDD mode. Figure 7 illustrates the soft scratchpad size of the UE as indicated by the total number of soft channel bits as a function of its UE class. Figure 8 is a flow chart illustrating a conventional method of dividing a soft temporary storage area. Figure 9 illustrates the steps of a conventional soft scratchpad partition in an FDD system with 3 DL serving cells. Figure 10 illustrates the steps of a conventional soft scratchpad partition in a TDD system with three TDD service cells. Figure 11 illustrates a conventional DL HARQ ACK or NACK (ACK/NACK) feedback timeline in an FDD system. Figure 12 illustrates a downlink association set index for TDD . FIG. 13A illustrates a DL HARQ ACK or NACK (ACK/NACK) feedback timeline in a TDD single serving cell system configured with UL/DL configuration 0. FIG. 13B illustrates a DL HARQ ACK or NACK (ACK/NACK) feedback timeline in a TDD single serving cell system configured with UL/DL configuration 1. FIG. 13C illustrates a DL HARQ ACK or NACK (ACK/NACK) feedback timeline in a TDD single serving cell system configured with UL/DL configuration 5. 14 illustrates a different set of downlink-reference UL/DL configurations for secondary serving cells based on one or more pairs formed by primary cell UL/DL configuration and secondary cell UL/DL configuration. 15 illustrates a DL HARQ ACK or NACK (ACK/NACK) feedback timeline in a TDD CA system in which PCell and SCell are configured with different UL/DL configurations. Figure 16A illustrates carrier aggregation implemented by aggregating at least one serving cell deployed on a licensed spectrum and at least one serving cell deployed on an unlicensed spectrum. 16B illustrates a method proposed by a cross-carrier HARQ retransmission mechanism in accordance with a first exemplary embodiment of the present disclosure. Figure 16C illustrates the mobile device proposed by the present disclosure. 16D illustrates a method proposed by a mobile device to handle communication operations in a wireless communication system suitable for use in a network in accordance with one of the exemplary embodiments of the present disclosure. 17A illustrates the maximum number of LAA groups having DL HARQ procedures when authorizing FDD service cells to assist unauthorized full DL serving cells in accordance with a second exemplary embodiment of the present disclosure. 17B illustrates the maximum number of LAA groups having DL HARQ procedures when authorizing FDD service cells to assist two unlicensed full DL serving cells in accordance with a second exemplary embodiment of the present disclosure. 17C illustrates an LAA group when the TDD service cells are authorized to assist an unauthorised TDD serving cell in accordance with the second exemplary embodiment of the present disclosure, wherein both of the above service cells are configured with TDD UL/DL configuration 0. Has the maximum number of DL HARQ programs. 17D illustrates a LAA group when an authorized TDD service cell assists an unauthorized TDD service cell in which both of the above service cells are configured with a TDD UL/DL configuration 5, in accordance with a second exemplary embodiment of the present disclosure. Has the maximum number of DL HARQ programs. 17E illustrates that when authorizing a TDD serving cell to assist an unlicensed TDD serving cell in accordance with a second exemplary embodiment of the present disclosure, wherein the TDD serving cell is configured to configure TDD UL/DL configuration 0 and the TDD service cell is not configured to configure TDD UL/ When DL configuration 5, the LAA group has the maximum number of DL HARQ programs. 17F illustrates a LAA group having a DL HARQ procedure when an authorized TDD serving cell is configured with a TDD UL/DL configuration 0 when the authorized TDD service cell assists a full DL serving cell in accordance with the second exemplary embodiment of the present disclosure. The maximum number. 17G illustrates a LAA group having a DL HARQ procedure when authorizing an FDD serving cell to assist an unauthorised TDD serving cell in accordance with a second exemplary embodiment of the present disclosure, wherein the authorized TDD serving cell is configured with TDD UL/DL configuration 0 The maximum number. FIG. 18 is a flowchart illustrating a method of dividing a soft temporary storage area according to a third exemplary embodiment of the present disclosure. FIG. 19A illustrates whether a cell based on an authorization service assists at least one unauthorized service cell determination according to a third exemplary embodiment of the present disclosure. . FIG. 19B illustrates determining the number of unauthorized service cell based on LAA group according to the third exemplary embodiment of the present disclosure. . 19C illustrates traffic load determination of LAA group-based unauthorized service cells in accordance with a third exemplary embodiment of the present disclosure . 19D illustrates the traffic load on an LAA group-based unauthorized service cell and the number of unauthorized service cell numbers of the LAA group in accordance with a third exemplary embodiment of the present disclosure. . FIG. 19E illustrates determining the congestion rate of unauthorized service cells in a LAA group according to a third exemplary embodiment of the present disclosure. . 20 illustrates an example of configuring two authorized TDD service cells and one unauthorized TDD service cell, wherein one of the authorized TDD service cells assists an unauthorized TDD service cell, and two of them, in accordance with a third exemplary embodiment of the present disclosure. Each authorized TDD service cell is configured with TDD UL/DL configuration 0. 21 illustrates an example of configuring two authorized TDD service cells and one unauthorized TDD service cell in accordance with a third exemplary embodiment of the present disclosure, wherein one of the authorized TDD service cells assists an unauthorised TDD service cell, and two of Each authorized TDD service cell is configured with UL/DL configuration 0. 22 illustrates an example of configuring two authorized FDD DL serving cells and an unauthorized FDD DL serving cell in accordance with a third exemplary embodiment of the present disclosure, wherein one of the authorized FDD DL serving cells assists an unauthorized FDD DL serving cell. 23 illustrates an example of configuring two authorized FDD DL serving cells and an unauthorized FDD DL serving cell in accordance with a third exemplary embodiment of the present disclosure, wherein one of the authorized FDD DL serving cells assists an unauthorized FDD DL serving cell. 24 illustrates an example of processing a HARQ ACK or NACK (ACK/NACK) feedback timeline of a TDD cross-band CA system in accordance with a fourth exemplary embodiment of the present disclosure, wherein the grant service cell is configured with UL/DL configuration 0 and is not authorized The serving cell is configured with UL/DL configuration 5. Figure 25 illustrates a modified downlink association set index for unauthorized TDD service cells when an authorized TDD service cell is assisted by an authorized TDD service cell , where the authorized TDD service cell is configured with UL/DL configuration 0. Figure 26 illustrates a modified downlink association set index for unauthorized TDD service cells when an authorized TDD service cell is assisted by an authorized TDD service cell , where the authorized TDD service cell is configured with UL/DL configuration 1. Figure 27 illustrates a modified downlink association set index for unauthorized TDD service cells when an authorized TDD service cell is not assisted by an authorized TDD service cell , where the authorized TDD service cell is configured with UL/DL configuration 2. 28 illustrates a modified downlink association set index for unauthorized TDD service cells when an authorized TDD service cell is assisted by an authorized TDD service cell , where the authorized TDD service cell is configured with UL/DL configuration 3. Figure 29 illustrates a modified downlink association set index for unauthorized TDD service cells when an authorized TDD service cell is not assisted by an authorized TDD service cell , where the authorized TDD service cell is configured with UL/DL configuration 4. Figure 30 illustrates a modified downlink association set index for unauthorized TDD service cells when an authorized TDD service cell is assisted by an authorized TDD service cell , where the authorized TDD service cell is configured with UL/DL configuration 5. Figure 31 illustrates a modified downlink association set index for unauthorized TDD service cells when an authorized TDD service cell is not assisted by an authorized TDD service cell , where the authorized TDD service cell is configured with UL/DL configuration 6.

S1601~S1604‧‧‧Steps

Claims (55)

A method of processing a communication operation by a mobile device in a wireless communication system, the method being applicable to the mobile device configured with a plurality of service cells through a network of the wireless communication system, wherein the plurality of service cells include a first serving cell and a second serving cell, the method comprising: receiving a first transmission in a first subframe via the first serving cell and decoding the first transmission; Decoding the first transmission to generate a decoding result; transmitting an acknowledgement or a negative acknowledgement in a second subframe, wherein the acknowledgement or negative acknowledgement corresponds to the decoding result; and via the second service The cell receives a second transmission in a third subframe, wherein the second transmission is a retransmission of the first transmission. The method of claim 1, wherein the first serving cell is an authorized serving cell or an unauthorized serving cell. The method of claim 1, wherein the second serving cell is an authorized serving cell or an unauthorized serving cell. The method of claim 1, wherein the first serving cell and the second serving cell are the same or different. The method of claim 1, wherein the second sub-frame is after the first sub-frame. The method of claim 1, wherein the third sub-frame is after the second sub-frame. The method of claim 1, the method further comprising: if the first transmission is not successfully decoded, the at least one soft channel bits of the first transmission are Stored in at least one partition of the soft scratchpad. The method of claim 7, wherein the method further comprises: at least with Separating the soft temporary storage into a plurality of partitions, wherein Is the size of the soft temporary storage area, Is the number of authorized service cells configured to the mobile device, Is the maximum number of Hybrid Automatic Repeat reQuest (HARQ) programs and the Is a constant or configurable parameter. The method of claim 8, wherein the soft temporary storage area is divided according to the following equation: Among the above Is the size of the soft temporary storage area, Is the number of authorized service cells configured to the mobile device, Is the maximum number of downlink hybrid automatic repeat request procedures, Is a constant or configurable parameter, Is the maximum number of transport blocks that can be transmitted to the mobile device per transmission time interval. The method of claim 8, wherein the determining whether the authorized service cell assists an unauthorized service cell determines . The method of claim 10, wherein the authorized service cell assists the unauthorized service cell, It is 12. The method of claim 8, wherein the determining is based on a number of unauthorized service cells configured to the mobile device . The method of claim 12, wherein if the number of unauthorized service cells configured to the mobile device is 1, 2 or 3, respectively, It is 12, 16 or 20. The method of claim 8, wherein the determining is based on a traffic load category of unauthorized service cells . The method of claim 14, wherein if the traffic load categories of the unauthorized service cells are high, medium, and low, respectively, It is 16, 12 and 8. The method of claim 8, wherein the determining is based on a tamping rate of unauthorised serving cells . The method of claim 16, wherein if the clogging rates of the unauthorized service cells are high, medium, and low, respectively, It is 8, 12 and 16. The method of claim 8, wherein the determining is based on a traffic load category of at least one unauthorized service cell and at least one configured unlicensed service cell number . The method of claim 8, wherein the method It is configured through higher layer signaling or physical layer signaling through the network. The method of claim 19, wherein the higher layer signaling is through a Radio Resource Control (RRC), a System Information Block (SIB), or a Master Information Block (Master Information). Block, BIB) transmission. The method of claim 19, wherein the entity layer signaling is transmitted through Downlink Control Information (DCI). The method of claim 8, wherein the first serving cell and the second serving cell share the same . The method of claim 22, wherein if the first serving cell is a frequency division duplex downlink serving cell and the second serving cell is a full downlink serving cell, Is 16. The method of claim 23, wherein if the mobile device is further configured to a third serving cell, Is 24. The method of claim 22, wherein if the uplink/downlink configuration 0 is configured to both the first serving cell and the second serving cell, Is 8. The method of claim 22, wherein if the uplink/downlink configuration 5 is configured to both the first serving cell and the second serving cell, Is 30. The method of claim 22, wherein if the uplink/downlink configuration 0 is configured to the first serving cell and the uplink/downlink configuration 5 is configured to the second service Cell, then said Is 13. The method of claim 22, wherein if the uplink/downlink configuration 0 is configured to the first serving cell and the second serving cell is a full downlink serving cell, Description Is 14. The method of claim 22, wherein the first serving cell is configured as a frequency division duplex downlink serving cell and the uplink/downlink configuration 0 is configured to the second service Cell, then said Is 12. The method of claim 1, wherein if the second sub-frame is a sub-frame having a sub-frame number n, the first sub-frame is a sub-frame number nk Frame, where k is a positive integer. The method of claim 30, wherein the k is a constant. The method of claim 30, wherein the k K and the K is a downlink association set index including at least one element. The method of claim 32, wherein if the uplink/downlink configuration 0 is configured for the first serving cell, the downlink association set index (K) is determined according to the following table: The method of claim 32, wherein if the uplink/downlink configuration 1 is configured to the first serving cell, the downlink association set index (K) is determined according to the following table: The method of claim 32, wherein if the uplink/downlink configuration 2 is configured for the first serving cell, the downlink association set index (K) is determined according to the following table: The method of claim 32, wherein if the uplink/downlink configuration 3 is configured to the first serving cell, the downlink association set index (K) is determined according to the following table: The method of claim 32, wherein if the uplink/downlink configuration 4 is configured to the first serving cell, the downlink association set index (K) is determined according to the following table: The method of claim 32, wherein if the uplink/downlink configuration 5 is configured to the first serving cell, the downlink association set index (K) is determined according to the following table: The method of claim 32, wherein if the uplink/downlink configuration 6 is configured for the first serving cell, the downlink association set index (K) is determined according to the following table: A method of processing a communication operation by a mobile device in a wireless communication system for a network of a wireless communication system, the method being adapted to configure a plurality of service cells to the network of the mobile device, wherein The plurality of service cells include a first serving cell and a second serving cell, the method comprising: transmitting a first transmission in a first subframe via the first serving cell; Receiving, by the frame, an acknowledgement or a negative acknowledgement, wherein the acknowledgement or negative acknowledgement corresponds to the first transmission; and transmitting a second transmission in a third subframe via the second serving cell, wherein The second transmission is a retransmission of the first transmission. The method of claim 40, wherein the first serving cell is an authorized serving cell or an unauthorized serving cell. The method of claim 40, wherein the second serving cell is an authorized serving cell or an unauthorized serving cell. The method of claim 40, wherein the first serving cell and the second serving cell are the same or different. The method of claim 40, wherein the second subframe is after the first subframe. The method of claim 40, wherein the third subframe is after the second subframe. The method of claim 40, wherein if the second sub-frame is a sub-frame having a sub-frame number n, the first sub-frame is a sub-frame number nk Frame, where k is a positive integer. The method of claim 46, wherein the k is a constant. The method of claim 46, wherein the k K and the K is a downlink association set index including at least one element. The method of claim 48, wherein if the uplink/downlink configuration 0 is configured for the first serving cell, the downlink association set index (K) is determined according to the following table: The method of claim 48, wherein if the uplink/downlink configuration 1 is configured to the first serving cell, the downlink association set index (K) is determined according to the following table: The method of claim 48, wherein if the uplink/downlink configuration 2 is configured to the first serving cell, the downlink association set index (K) is determined according to the following table: The method of claim 48, wherein if the uplink/downlink configuration 3 is configured to the first serving cell, the downlink association set index (K) is determined according to the following table: The method of claim 48, wherein if the uplink/downlink configuration 4 is configured for the first serving cell, the downlink association set index (K) is determined according to the following table: The method of claim 48, wherein if the uplink/downlink configuration 5 is configured for the first serving cell, the downlink association set index (K) is determined according to the following table: The method of claim 48, wherein if the uplink/downlink configuration 6 is configured for the first serving cell, the downlink association set index (K) is determined according to the following table: