US20170064696A1 - Reconfiguration control channel resource mapping collision avoidance - Google Patents
Reconfiguration control channel resource mapping collision avoidance Download PDFInfo
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- US20170064696A1 US20170064696A1 US15/262,348 US201615262348A US2017064696A1 US 20170064696 A1 US20170064696 A1 US 20170064696A1 US 201615262348 A US201615262348 A US 201615262348A US 2017064696 A1 US2017064696 A1 US 2017064696A1
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Definitions
- LTE long term evolution
- UE user equipment
- FIG. 1 is an illustration of an example configuration of a communication network architecture according to an example embodiment.
- FIG. 2 is a timing diagram illustrating a physical uplink control channel (PUCCH) resource collision issue according to an example embodiment.
- PUCCH physical uplink control channel
- FIG. 3 is a timing diagram illustrating a UL/DL configuration 2 achieved by flexibly changing the transmission direction of subframes #3 and #8 from UL to DL to meet instant traffic conditions according to an example embodiment.
- FIG. 4 is a table identifying a downlink association set index K for TDD according to the DL-reference UL/DL configuration Table 10.1.3.1-1 in 3GPP Rel. 11 according to an example embodiment.
- FIG. 5 is a table identifying j and l values for DL subframe within set K that associated with subframe 7 for HARQ-ACK feedback according to an example embodiment.
- FIG. 6 is a table identifying a HARQ-ACK resource offset field in the DCI format of the corresponding EPDCCH according to an example embodiment.
- FIG. 7 is a timing diagram illustrating PUCCH mapping according to an example embodiment.
- FIG. 8 is a table utilized to determine the value of n PUCCHj (1) according to higher layer configuration for a PDSCH transmission where there is not a corresponding PDCCH/EPDCCH detected in subframe n ⁇ k i according to an example embodiment.
- FIG. 9 is a table utilized to determine the value of n PUCCH (3, ⁇ tilde over (p) ⁇ ) according to higher layer configuration according to an example embodiment.
- FIG. 10 is a flowchart illustrating a method of physical uplink control channel (PUCCH) resources mapping according to an example embodiment.
- PUCCH physical uplink control channel
- FIG. 11 is a flowchart illustrating a method of classifying DL subframe Types according to an example embodiment.
- FIG. 12 is a flowchart illustrating a method of determining the offset for Type 1 DL subframes according to an example embodiment.
- FIG. 14 is a block diagram of electronic circuitry for performing one or more methods according to example embodiments.
- FIG. 1 is an illustration of an example configuration of a communication network architecture 100 , in accordance with some embodiments.
- a carrier-based network such as an IEEE 802.11 compatible wireless access point or a LTE/LTE-A cell network operating according to a standard from a 3GPP standards family is established by network equipment 102 .
- the network equipment 102 may include a wireless access point, a Wi-Fi hotspot, or an enhanced or evolved node B (eNodeB) communicating with communication devices 104 A, 104 B, 104 C (e.g., a user equipment (UE) or a communication station (STA)).
- eNodeB enhanced or evolved node B
- the carrier-based network includes wireless network connections 106 A, 106 B, and 106 C with the communication devices 104 A, 104 B, and 104 C, respectively.
- the communication devices 104 A, 104 B, 104 C are illustrated as conforming to a variety of form factors, including a smartphone, a mobile phone handset, and a personal computer having an integrated or external wireless network communication device.
- the network equipment 102 is illustrated in FIG. 1 as being connected via a network connection 114 to network servers 118 in a cloud network 116 .
- the servers 118 may operate to provide various types of information to, or receive information from, communication devices 104 A, 104 B, 104 C, including device location, user profiles, user information, web sites, e-mail, and the like.
- the techniques described herein enable the determination of the location of the various communication devices 104 A, 104 B, 104 C, with respect to the network equipment 102 .
- Communication devices 104 A, 104 B, 104 C may communicate with the network equipment 102 when in range or otherwise in proximity for wireless communications.
- the connection 106 A may be established between the mobile device 104 A (e.g., a smartphone) and the network equipment 102 ;
- the connection 106 B may be established between the mobile device 104 B (e.g., a mobile phone) and the network equipment 102 ;
- the connection 106 C may be established between the mobile device 104 C (e.g., a personal computer) and the network equipment 102 .
- the wireless communications 106 A, 106 B, 106 C between devices 104 A, 104 B, 104 C may utilize a Wi-Fi or IEEE 802.11 standard protocol, or a protocol such as the current 3rd Generation Partnership Project (3GPP) long term evolution (LTE) time division duplex (TDD)-Advanced systems.
- the communications network 116 and network equipment 102 comprises an evolved universal terrestrial radio access network (EUTRAN) using the 3rd Generation Partnership Project (3GPP) long term evolution (LTE) standard and operating in time division duplexing (TDD) mode.
- EUTRAN evolved universal terrestrial radio access network
- 3GPP 3rd Generation Partnership Project
- LTE long term evolution
- TDD time division duplexing
- the devices 104 A, 104 B, 104 C may include one or more antennas, receivers, transmitters, or transceivers that are configured to utilize a Wi-Fi or IEEE 802.11 standard protocol, or a protocol such as 3GPP, LTE, or LTE TDD-Advanced or any combination of these or other communications standards.
- Antennas in or on devices 104 A, 104 B, 104 C may comprise one or more directional or omnidirectional antennas, including, for example, dipole antennas, monopole antennas, patch antennas, loop antennas, microstrip antennas or other types of antennas suitable for transmission of RF signals.
- a single antenna with multiple apertures may be used instead of two or more antennas.
- each aperture may be considered a separate antenna.
- antennas may be effectively separated to utilize spatial diversity and the different channel characteristics that may result between each of the antennas and the antennas of a transmitting station.
- antennas may be separated by up to 1/10 of a wavelength or more.
- a base station such as an enhanced or evolved node B (eNodeB) may provide wireless communication services to communication devices, such as device 104 A.
- eNodeB enhanced or evolved node B
- the exemplary communication system 100 of FIG. 1 depicts only three devices users 104 A, 104 B, 104 C any combination of multiple users, devices, servers and the like may be coupled to network equipment 102 in various embodiments.
- three or more users located in a venue such as a building, campus, mall area, or other area, and may utilize any number of mobile wireless-enabled computing devices to independently communicate with network equipment 102 .
- communication system 100 may include more than one network equipment 102 .
- a plurality of access points or base stations may form an overlapping coverage area where devices may communicate with at least two instances of network equipment 102 .
- TDD UL/DL configuration 1 is assumed to be indicated in SystemInformationBlockType1 (SIB1), but the actual TDD UL-DL configuration, is UL/DL configuration 2 as indicated at 210 , which is achieved by flexibly changing the transmission direction of subframes #3 and #8 from UL to DL to meet instant traffic conditions and consequently maximize the radio spectrum efficiency as seen in FIG. 3 at 310 and 315 respectively.
- SIB1 SystemInformationBlockType1
- the DL-reference UL/DL configuration is known by Rel-12 UL/DL reconfiguration capable UE so that UE can utilize the flexible subframe resources.
- UE can properly determine the hybrid automatic repeat request-acknowledgement (HARQ-ACK) timeline for physical dedicated shared channel (PDSCH) transmission according to DL-reference UL/DL configuration.
- HARQ-ACK hybrid automatic repeat request-acknowledgement
- PDSCH physical dedicated shared channel
- DL-reference UL/DL configuration is assumed to be TDD UL/DL configuration 2.
- the PUCCH resources associated with the two PDCCHs-PDCCH 1 in subframe #9 at 215 within radio frame n ⁇ 1 for UE1 and PDCCH 2 in subframe #0 at 220 within radio frame n for UE2 are collided in the same PUCCH 1a/1b resource at the UL subframe #7 at 225 in radio frame n.
- the implicitly mapped PUCCH resources are exactly the same at two UEs according to the equation below:
- n PUCCH,i (1) ( M ⁇ m ⁇ 1) ⁇ N c +m ⁇ N c+1 +n CCE,m +N PUCCH (1)
- n CCE,m is the number of the first CCE used for transmission of the corresponding PDCCH in subframe. This is a common PUCCH resource collision issue for all TDD UL/DL re-configuration signaling methods. Two solutions are proposed to address it.
- the PDSCH subframes are firstly classified into two types—Type 1 and Type 2. After classification of the subframes, PUCCH resource mapping is performed based on DL subframe types. Additionally, to avoid excessive control overhead, the ARO (i.e. HARQ-ACK resource offset field) may be used to compress the PUCCH region.
- ARO i.e. HARQ-ACK resource offset field
- the downlink subframes associated with an uplink subframe for HARQ-ACK feedback are classified into two types (i.e. Type 1 and Type 2) according to the TDD UL/DL configuration contained in SIB1 message and the DL-reference UL/DL configuration indicated by higher layer signaling as below:
- Type 1 subframes are DL subframes that associated with a UL subframe n for HARQ-ACK feedback according to the SIB1 TDD UL/DL configuration.
- Type 2 subframes are the DL subframes that are constructed with a two-step approach:
- Step-1 Type 2 subframes are DL subframes associated with the UL subframe n for HARQ-ACK feedback according to a higher layer configured DL-reference UL/DL configuration.
- This configuration can be either implicitly determined based on TDD UL/DL configurations of two consecutive radio frames as documented in previous IDF [1] or explicitly indicated by higher-layer signaling.
- Step-2 if the Type 1 subframes are overlapped with the Type 2 subframes that have been constructed in Step-1, the overlapping subframes will be further removed from Type 2 subframes.
- Type 1 subframes include subframe #1 at 305 and #0 at 310 in radio frame n.
- Type 2 subframes comprise of subframe #3 at 320 in radio frame n and subframe #9 at 325 in radio frame n ⁇ 1.
- Solution 1 PUCCH format 1b with Channel Selection (CS).
- CS Channel Selection
- M the number of elements in the set K defined in Table 10.1.3.1-1 in 3GPP Rel. 11 as shown at 400 in FIG. 4 identifying a downlink association set index K for TDD according to the DL-reference UL/DL configuration.
- the Set K is further divided into two sets: K 1 and K 2 , each of which is comprised of a number of subframes in set K.
- the set K 1 includes all Type 1 subframe and set K 2 includes all Type 2 subframe.
- M M 1 +M 2 , where M 1 and M 2 denotes the number of DL subframes in set K 1 and K 2 respectively.
- SIB1 TDD UL/DL configuration is configuration 1
- DL-reference UL/DL configuration is configuration 2
- the corresponding j and l values for DL subframe within set K that associated with subframe 7 for HARQ-ACK feedback are shown at 500 in FIG. 5 with an example of DL subframe indexing across set K 1 at 510 and K 2 at 515 .
- PUCCH resources mapping is performed as follows: For a PDSCH transmission indicated by the detection of corresponding PDCCH or a PDCCH indicating downlink SPS release in subframe n ⁇ k i , if it corresponds to Type 1 subframe j (0 ⁇ j ⁇ M 1 ⁇ 1), the PUCCH resource
- n PUCCH,j (1) ( M 1 ⁇ j ⁇ 1) ⁇ N c +j ⁇ N c+1 +n CCE,j +N PUCCH (1) (1-0)
- the PUCCH resource If it corresponds to Type 2 subframe l (0 ⁇ l ⁇ M 2 ⁇ 1), the PUCCH resource:
- N CFI,c is detected Control Formal Indicator (CFI) value carried on Physical Control Format Indicator Channel (PCFICH) channel in subframe c
- CFI Control Formal Indicator
- PCFICH Physical Control Format Indicator Channel
- Index j is the index of Type 1 subframe within set K 1
- index l is the index of Type 2 subframe within set K 2 .
- N PUCCH (1) is PUCCH resource offset associated with legacy PDCCH that is configured by higher layers for PUCCH resource mapping.
- N PUCCH (2) is a PUCCH resource offset providing the starting point of the PUCCH resources for Type 2 subframes, which can be configured by higher layer, either in a UE specific or Cell specific manner, or be calculated using the formula:
- N PUCCH (2) M 1 ⁇ N 4 (5-0)
- This PUCCH Format 1a/1b resource for an HARQ-ACK signal transmission in response to legacy PDCCH-scheduled PDSCH can be further optimized by introducing 2-bits ARO (i.e. HARQ-ACK resource offset field) to avoid excessive control overhead, and considering the fact that dynamic PUCCH format 1a/1b resource space is often underutilized.
- 2-bits ARO i.e. HARQ-ACK resource offset field
- an explicit 2-bit ARO indication field is always present for all the DL DCI formats that are carried by UE specific search space on legacy PDCCH across all DL subframes, regardless of subframe type.
- the equation (1-0), (2-0), (3-0) and (4-0) can be straightforwardly extended to (1-1), (2-1), (3-1) and (4-1) by using 2-bits ARO as:
- EPDCCH-PRB-set q For a PDSCH transmission indicated by the detection of corresponding EPDCCH or a EPDCCH indicating downlink SPS release in sub-frame n ⁇ k i where k i ⁇ K, the UE shall use if EPDCCH-PRB-set q is configured for distributed transmission:
- N ECCE,q,n-k i1 is equal to the number of ECCEs in EPDCCH-PRB-set q configured for that UE in subframe n ⁇ k i1 . If the UE is not configured to monitor EPDCCH in subframe n ⁇ k i1 , N ECCE,q,n-k i1 is equal to the number of ECCEs computed assuming EPDCCH-PRB-set q is configured for that UE in subframe n ⁇ k i1 .
- N ECCE,q,n-k i1 is equal to 0.
- L i denotes the minimum supportable aggregation level in subframe i.
- solution 2 the PUCCH format 3 is used for HARQ-ACK feedback.
- a different potential solution is that one (e.g. for one antenna port case) or two (e.g. for two antenna ports case) PUCCH format 1a/1b resource(s) are configured by higher layer for UL/DL reconfiguration capable of UE, and PUCCH format 3 is required to be configured for HARQ-ACK transmission after UL/DL reconfiguration is activated for one UE.
- the UE shall use the PUCCH format 1a/1b and the higher-layer configured PUCCH format 1a/1b resource for HARQ-ACK feedback.
- UE For a single PDSCH transmission where there is not a corresponding PDCCH/EPDCCH detected within subframe(s) n ⁇ k, where k ⁇ K, and no PDCCH/EPDCCH indicating downlink SPS release within subframe(s) n ⁇ k, where k ⁇ K, UE shall determine the PUCCH resources according to higher layer configuration and Table 9.2-2.
- UE shall use PUCCH format 3 and PUCCH resource n PUCCH (3, ⁇ tilde over (p) ⁇ ) where the value of n PUCCH (3, ⁇ tilde over (p) ⁇ ) is determined according to higher layer configuration and Table 10.1.2.2.2-1 shown at 900 in FIG. 9 . If DAI value greater than ‘1’ is indicated in PDCCH, the TPC field in a PDCCH assignment with DAI value greater than ‘1’ shall be used to determine the PUCCH resource value from one of the four PUCCH resource values configured by higher layers, with the mapping defined in Table 10.1.2.2.2-1.
- the HARQ-ACK resource offset field in the DCI format of the corresponding EPDCCH assignment with DAI value greater than ‘1’ shall be used to determine the PUCCH resource value from one of the four PUCCH resource values configured by higher layers, with the mapping defined in Table 10.1.2.2.2-1.
- FIG. 10 is a flowchart illustrating a method 1000 beginning with UE receiving a physical downlink shared channel (PDSCH) transmission at 1010 from a base station.
- Processing circuitry is used to classify downlink (DL) subframe types at 1020 for a set of DL subframes associated with a first uplink (UL) subframe for transmission of a hybrid automatic report request acknowledgment (HARQ-ACK).
- the processing circuitry further performs physical uplink control channel (PUCCH) resources mapping at 1030 based on the classified DL subframe Types for an acknowledgement transmission associated with PDSCH transmission reception.
- PUCCH physical uplink control channel
- FIG. 11 is a flowchart illustrating a method 1100 of classifying the DL subframe Types.
- Type 1 DL subframes that are constructed by DL subframes that are associated with a first uplink (UL) subframe for transmission of HARQ-ACK according to a time division duplex (TDD) UL/DL configuration indicated in a system information block Type 1 (SIB1) message.
- Type 2 DL subframes are constructed at 1120 by firstly identifying DL subframes that are associated with the first UL subframe for transmission of HARQ-ACK according to a higher layer configured DL-reference UL/DL configuration. If the Type 1 DL subframes are overlapped with the Type 2 DL subframes, the overlapping subframes between Type 1 and Type 2 DL subframes are further removed from the Type 2 DL subframes at 1130 .
- FIG. 13 is a flowchart illustrating a method 1300 of determining the offset for Type 2 DL subframe.
- processing circuitry is used to determine the HARQ-ACK offset for a Type 2 DL subframe based on 2-bits HARQ-ACK resource offset field in the DCI format of the corresponding PDCCH depending on the number of Type 2 DL subframes associated with the first UL subframe for HARQ-ACK transmission.
- the method 1300 processed to select a ⁇ ARO value out of ⁇ 0, ⁇ 1, ⁇ 2, 2 ⁇ at 1310 if the number of Type 2 DL subframes is one.
- CFI Control Formal Indicator
- FIG. 14 is a block diagram of a specifically programmed computer system to act as one or more different types of UE, cell stations, including small cell stations and macro stations.
- the system may be used to implement one or more methods according to the examples described.
- a hardware and operating environment is provided to enable the computer system to execute one or more methods and functions that are described herein.
- the system may be a small cell station, macro cell station, smart phone, tablet, or other networked device that can provide access and wireless networking capabilities to one or more devices. Such devices need not have all the components included in FIG. 14 .
- the basic unit of the wireless resource is the Physical Resource Block (PRB).
- the PRB may comprise 12 sub-carriers in the frequency domain and N consecutive symbols corresponding to 0.5 ms in the time domain depends on the cyclic prefix length configured by the higher layer parameter.
- the PRB may comprise a plurality of resource elements (REs).
- a RE is uniquely defined by the index pair (k, l) in a slot where k is index in frequency domain and l is the index in the time domain.
- Two types of reference signals may be transmitted by an eNB including demodulation reference signals (DM-RS), a common reference signal (CRS) and/or channel state information reference signals (CSI-RS).
- DM-RS demodulation reference signals
- CRS common reference signal
- CSI-RS channel state information reference signals
- the DM-RS may be used by the UE for data demodulation.
- the reference signals may be transmitted in predetermined PRBs.
- the cell station 1400 and the eNBs may be configured to communicate signals that were transmitted using one or more other modulation techniques such as spread spectrum modulation (e.g., direct sequence code division multiple access (DS-CDMA) and/or frequency hopping code division multiple access (FH-CDMA)), time-division multiplexing (TDM) modulation, and/or frequency-division multiplexing (FDM) modulation, although the scope of the embodiments is not limited in this respect.
- spread spectrum modulation e.g., direct sequence code division multiple access (DS-CDMA) and/or frequency hopping code division multiple access (FH-CDMA)
- TDM time-division multiplexing
- FDM frequency-division multiplexing
- the cell station 1400 may be part of a portable wireless communication device, such as a personal digital assistant (PDA), a laptop or portable computer with wireless communication capability, a web tablet, a wireless telephone, a wireless headset, a pager, an instant messaging device, a digital camera, an access point, a television, a medical device (e.g., a heart rate monitor, a blood pressure monitor, etc.), or other device that may receive and/or transmit information wirelessly.
- PDA personal digital assistant
- a laptop or portable computer with wireless communication capability such as a personal digital assistant (PDA), a laptop or portable computer with wireless communication capability, a web tablet, a wireless telephone, a wireless headset, a pager, an instant messaging device, a digital camera, an access point, a television, a medical device (e.g., a heart rate monitor, a blood pressure monitor, etc.), or other device that may receive and/or transmit information wirelessly.
- a portable wireless communication device such as a personal digital assistant (PDA), a
- the CSI-RS are transmitted periodically in particular antenna ports (up to eight transmit antenna ports) at different subcarrier frequencies (assigned to the cell station) for use in estimating a MIMO channel.
- a cell station-specific demodulation reference signal e.g., a DM-RS
- a device comprising:
- a transceiver to receive, from a base station, a physical downlink shared channel (PDSCH) transmission;
- PUCCH physical uplink control channel
- Type 1 DL subframes that are constructed by DL subframes that are associated with a first uplink (UL) subframe for transmission of HARQ-ACK according to a time division duplex (TDD) UL/DL configuration indicated in a system information block Type 1 (SIB1) message; and
- Type 2 DL subframes that are constructed by:
- Type 1 DL subframes are overlapped with the Type 2 DL subframes, the overlapping subframes between Type 1 and Type 2 DL subframes are further removed from the Type 2 DL subframes.
- processing circuitry further performs PUCCH resource mapping for PDSCH transmission indicated via Physical Downlink Control Channel (PDCCH) on a Type 1 DL subframe based on:
- PUCCH Physical Downlink Control Channel
- n PUCCH,j (1) ( M 1 ⁇ j ⁇ 1) ⁇ N c +j ⁇ N c+1 +n CCE,j +N PUCCH (1)
- N PUCCH (1) is a PUCCH resource offset associated with legacy PDCCH that is configured by higher layer for PUCCH resource mapping of Type 1 DL subframes
- N RB DL refers to Downlink bandwidth configuration
- N sc RB refers to resource block size in the frequency domain that is expressed as a number of subcarriers
- n CCE,j is the number of the first control channel element (CCE) used for transmission of the corresponding PDCCH in Type 1 DL subframe j
- j(0 ⁇ j ⁇ M 1 ) is the index of the Type 1 DL subframe
- M 1 is the number of Type 1 DL subframes.
- processing circuitry further performs PUCCH resource mapping for PDSCH transmission indicated via PDCCH on a Type 1 DL subframe based on:
- n PUCCH,j (1) ( M 1 ⁇ j ⁇ 1) ⁇ N c +j ⁇ N c+1 +n CCE,j +N PUCCH (1) + ⁇ ARO
- ⁇ ARO refers to HARQ-ACK resource offset value that is selected from predefined values based on 2-bits HARQ-ACK resource offset field in a downlink control information (DCI) format depending on the number of Type 1 DL subframes associated with the first UL subframe for HARQ-ACK transmission.
- DCI downlink control information
- processing circuitry further performs determining the HARQ-ACK offset ⁇ ARO for a Type 1 DL subframe based on 2-bits HARQ-ACK resource offset field in the DCI format of the corresponding PDCCH depending on the number of Type 1 DL subframes associated with the first UL subframe for HARQ-ACK transmission:
- processing circuitry further performs PUCCH resource mapping for PDSCH transmission indicated via Physical Downlink Control Channel (PDCCH) on a Type 2 DL subframe based on higher-layer signaling or based on:
- PUCCH Physical Downlink Control Channel
- n CCE,l is the number of the first channel control element (CCE) used for transmission of the corresponding PDCCH in Type 2 DL subframe l
- CCE channel control element
- l(0 ⁇ l ⁇ M 2 ) is the index of a Type 2 DL subframe and M 2 is the number of Type 2 DL subframes
- N CFI,c is detected Control Formal Indicator (CFI) value carried on Physical Control Format Indicator Channel (PCFICH) channel in Type 2 subframe c.
- CFI Control Formal Indicator
- N PUCCH (2) M 1 ⁇ N 4
- ⁇ ARO refers to HARQ-ACK resource offset value that is selected based on 2-bits HARQ-ACK resource offset field in a downlink control information (DCI) format depending on the number of Type 2 DL subframes associated with the first UL subframe for HARQ-ACK transmission.
- DCI downlink control information
- processing circuitry further performs determining the HARQ-ACK offset for a Type 2 DL subframe based on 2-bits HARQ-ACK resource offset field in the DCI format of the corresponding PDCCH depending on the number of Type 2 DL subframes associated with the first UL subframe for HARQ-ACK transmission:
- CFI Control Formal Indicator
- the processing circuitry further performs PUCCH resource mapping for PDSCH transmission indicated via enhanced physical downlink control channel (EPDCCH) or a EPDCCH indicating downlink semi persistent scheduling (SPS) release in a Type 1 or Type 2 sub-frame, the user equipment (UE) shall use:
- EPDCCH enhanced physical downlink control channel
- SPS downlink semi persistent scheduling
- EPDCCH-physical resource block (PRB)-set q is configured for distributed transmission, or
- EPDCCH-PRB-set q is configured for localised transmission where n ECCE,q is the number of the first ECCE (i.e. lowest ECCE index used to construct the EPDCCH) used for transmission of a corresponding downlink control information (DCI) assignment in EPDCCH-PRB-set q in subframe n ⁇ k i , N PUCCH,q (e1) for EPDCCH-PRB-set q is configured by the higher layer parameter pucch-ResourceStartOffset-r11, N RB ECCE,q for EPDCCH-PRB-set q in subframe n ⁇ k i is given, and n′ is determined from the antenna port used for EPDCCH transmission in subframe n ⁇ k i , and ⁇ ARO is the HARQ-ACK resource offset.
- DCI downlink control information
- the processing circuitry further performs PUCCH resource mapping for PDSCH transmission indicated via EPDCCH or EPDCCH indicating downlink SPS release in a Type 1 or Type 2 sub-frame, the user equipment (UE) shall use:
- L i denotes the minimum supportable aggregation level in subframe i.
- a method comprising:
- PDSCH physical downlink shared channel
- PUCCH physical uplink control channel
- Type 2 DL subframes that are constructed by:
- Type 1 DL subframes are overlapped with the Type 2 DL subframes, the overlapping subframes between Type 1 and Type 2 DL subframes are further removed from the Type 2 DL subframes.
- N PUCCH,j (1) ( M 1 ⁇ j ⁇ 1) ⁇ N c +j ⁇ N c+1 +n CCE,j +N PUCCH (1)
- N PUCCH (1) is a PUCCH resource offset associated with legacy PDCCH that is configured by higher layer for PUCCH resource mapping of Type 1 DL subframes
- N RB DL refers to downlink bandwidth configuration
- N sc RB refers to resource block size in the frequency domain that is expressed as a number of subcarriers
- n CCE,j is the number of the first control channel element (CCE) used for transmission of the corresponding PDCCH in Type 1 DL subframe j
- j(0 ⁇ j ⁇ M 1 ) is the index of the Type 1 DL subframe
- M 1 is the number of Type 1 DL subframes.
- n PUCCH,j (1) ( M 1 ⁇ j ⁇ 1) ⁇ N c +j ⁇ N c+1 +n CCE,j +N PUCCH (1) + ⁇ ARO
- ⁇ ARO refers to HARQ-ACK resource offset value that is selected from predefined values based on 2-bits HARQ-ACK resource offset field in a downlink control information (DCI) format depending on the number of Type 1 DL subframes associated with the first UL subframe for HARQ-ACK transmission.
- DCI downlink control information
- n CCE,l is the number of the first channel control element (CCE) used for transmission of the corresponding PDCCH in Type 2 DL subframe l
- CCE channel control element
- l(0 ⁇ l ⁇ M 2 ) is the index of a Type 2 DL subframe and M 2 is the number of Type 2 DL subframes
- N CFI,c is detected Control Formal Indicator (CFI) value carried on Physical Control Format Indicator Channel (PCFICH) channel in Type 2 subframe c.
- CFI Control Formal Indicator
- N PUCCH (2) M 1 ⁇ N 4
- EPDCCH-physical resource block (PRB)-set q is configured for distributed transmission, or
- EPDCCH-PRB-set q is configured for localised transmission where n ECCE,q is the number of the first ECCE (i.e. lowest ECCE index used to construct the EPDCCH) used for transmission of a corresponding downlink control information (DCI) assignment in EPDCCH-PRB-set q in subframe n ⁇ k i , N PUCCH,q (e1) for EPDCCH-PRB-set q is configured by the higher layer parameter pucch-ResourceStartOffset-r11, N RB ECCE,q for EPDCCH-PRB-set q in subframe n ⁇ k i is given, and n′ is determined from the antenna port used for EPDCCH transmission in subframe n ⁇ k i , and ⁇ ARO is the HARQ-ACK resource offset.
- DCI downlink control information
- PDSCH physical downlink shared channel
- DL subframe types for a set of DL subframes associated with a first uplink (UL) subframe for transmission of a hybrid automatic report request acknowledgment (HARQ-ACK);
- PUCCH physical uplink control channel
- Type 1 DL subframes that are constructed by DL subframes that are associated with a first uplink (UL) subframe for transmission of HARQ-ACK according to a time division duplex (TDD) UL/DL configuration indicated in a system information block Type 1 (SIB1) message; and
- Type 2 DL subframes that are constructed by:
- Type 1 DL subframes are overlapped with the Type 2 DL subframes, the overlapping subframes between Type 1 and Type 2 DL subframes are further removed from the Type 2 DL subframes.
Abstract
A device includes a transceiver to receive, from a base station, a physical downlink shared channel (PDSCH) transmission and processing circuitry to classify downlink (DL) subframe types for a set of DL subframes associated with a first uplink (UL) subframe for transmission of a hybrid automatic report request acknowledgment (HARQ-ACK) and perform physical uplink control channel (PUCCH) resources mapping based on the classified DL subframe Types for an acknowledgement transmission associated with PDSCH transmission reception.
Description
- This application is a continuation of U.S. patent application Ser. No. 14/141,876, filed on Dec. 27, 2013, which claims priority to U.S. Provisional Patent Application Ser. No. 61/808,597, entitled PATTERN INDICATOR SIGNAL FOR NEW DMRS PATTERN, filed on Apr. 4, 2013, each of which is incorporated herein by reference in its entirety.
- LTE (long term evolution) communications continue to evolve, with more and more releases designed to optimize bandwidth utilization and throughput performance. The use of user equipment (UE) continues to grow, taxing the ability of communication systems to handle concomitant increases in bandwidth demand.
-
FIG. 1 is an illustration of an example configuration of a communication network architecture according to an example embodiment. -
FIG. 2 is a timing diagram illustrating a physical uplink control channel (PUCCH) resource collision issue according to an example embodiment. -
FIG. 3 is a timing diagram illustrating a UL/DL configuration 2 achieved by flexibly changing the transmission direction ofsubframes # 3 and #8 from UL to DL to meet instant traffic conditions according to an example embodiment. -
FIG. 4 is a table identifying a downlink association set index K for TDD according to the DL-reference UL/DL configuration Table 10.1.3.1-1 in 3GPP Rel. 11 according to an example embodiment. -
FIG. 5 is a table identifying j and l values for DL subframe within set K that associated withsubframe 7 for HARQ-ACK feedback according to an example embodiment. -
FIG. 6 is a table identifying a HARQ-ACK resource offset field in the DCI format of the corresponding EPDCCH according to an example embodiment. -
FIG. 7 is a timing diagram illustrating PUCCH mapping according to an example embodiment. -
FIG. 8 is a table utilized to determine the value of nPUCCHj (1) according to higher layer configuration for a PDSCH transmission where there is not a corresponding PDCCH/EPDCCH detected in subframe n−ki according to an example embodiment. -
FIG. 9 is a table utilized to determine the value of nPUCCH (3,{tilde over (p)}) according to higher layer configuration according to an example embodiment. -
FIG. 10 is a flowchart illustrating a method of physical uplink control channel (PUCCH) resources mapping according to an example embodiment. -
FIG. 11 is a flowchart illustrating a method of classifying DL subframe Types according to an example embodiment. -
FIG. 12 is a flowchart illustrating a method of determining the offset forType 1 DL subframes according to an example embodiment. -
FIG. 13 is flowchart illustrating a method of determining the offset forType 2 DL subframe according to an example embodiment. -
FIG. 14 is a block diagram of electronic circuitry for performing one or more methods according to example embodiments. - In the following description, reference is made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration specific embodiments which may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, and it is to be understood that other embodiments may be utilized and that structural, logical and electrical changes may be made without departing from the scope of the present invention. The following description of example embodiments is, therefore, not to be taken in a limited sense, and the scope of the present invention is defined by the appended claims.
-
FIG. 1 is an illustration of an example configuration of acommunication network architecture 100, in accordance with some embodiments. Within thecommunication network architecture 100, a carrier-based network such as an IEEE 802.11 compatible wireless access point or a LTE/LTE-A cell network operating according to a standard from a 3GPP standards family is established bynetwork equipment 102. Thenetwork equipment 102 may include a wireless access point, a Wi-Fi hotspot, or an enhanced or evolved node B (eNodeB) communicating withcommunication devices wireless network connections communication devices communication devices - The
network equipment 102 is illustrated inFIG. 1 as being connected via a network connection 114 tonetwork servers 118 in acloud network 116. Theservers 118, or any one individual server, may operate to provide various types of information to, or receive information from,communication devices various communication devices network equipment 102. -
Communication devices network equipment 102 when in range or otherwise in proximity for wireless communications. As illustrated, theconnection 106A may be established between themobile device 104A (e.g., a smartphone) and thenetwork equipment 102; theconnection 106B may be established between themobile device 104B (e.g., a mobile phone) and thenetwork equipment 102; and theconnection 106C may be established between the mobile device 104C (e.g., a personal computer) and thenetwork equipment 102. - The
wireless communications devices communications network 116 andnetwork equipment 102 comprises an evolved universal terrestrial radio access network (EUTRAN) using the 3rd Generation Partnership Project (3GPP) long term evolution (LTE) standard and operating in time division duplexing (TDD) mode. Thedevices - Antennas in or on
devices - In some embodiments, the
mobile device 104A may include one or more of a keyboard, a display, a non-volatile memory port, multiple antennas, a graphics processor, an application processor, speakers, and other mobile device elements. The display may be an LCD screen including a touch screen. Themobile device 104B may be similar tomobile device 104A, but does not need to be identical. The mobile device 104C may include some or all of the features, components, or functionality described with respect tomobile device 104A. - A base station, such as an enhanced or evolved node B (eNodeB), may provide wireless communication services to communication devices, such as
device 104A. While theexemplary communication system 100 ofFIG. 1 depicts only threedevices users network equipment 102 in various embodiments. For example, three or more users located in a venue, such as a building, campus, mall area, or other area, and may utilize any number of mobile wireless-enabled computing devices to independently communicate withnetwork equipment 102. Similarly,communication system 100 may include more than onenetwork equipment 102. For example, a plurality of access points or base stations may form an overlapping coverage area where devices may communicate with at least two instances ofnetwork equipment 102. - Although
communication system 100 is illustrated as having several separate functional elements, one or more of the functional elements may be combined and may be implemented by combinations of software-configured elements, such as processing elements including digital signal processors (DSPs), and/or other hardware elements. For example, some elements may comprise one or more microprocessors, DSPs, application specific integrated circuits (ASICs), radio-frequency integrated circuits (RFICs) and combinations of various hardware and logic circuitry for performing at least the functions described herein. In some embodiments, the functional elements ofsystem 100 may refer to one or more processes operating on one or more processing elements. - Embodiments may be implemented in one or a combination of hardware, firmware and software. Embodiments may also be implemented as instructions stored on a computer-readable storage device, which may be read and executed by at least one processor to perform the operations described herein. A computer-readable storage device may include any non-transitory mechanism for storing information in a form readable by a machine (e.g., a computer). For example, a computer-readable storage device may include read-only memory (ROM), random-access memory (RAM), magnetic disk storage media, optical storage media, flash-memory devices, and other storage devices and media. In some embodiments,
system 100 may include one or more processors and may be configured with instructions stored on a computer-readable storage device. - A new Rel-12 LTE WID on “Further Enhancements to LTE TDD for uplink/downlink (UL/DL) Interference Management and Traffic Adaptation” was recently agreed upon. The main objective is to enable TDD UL/DL reconfiguration for traffic adaptation for TD-LTE system, including clustered small cells deployment. Unlike a legacy (e.g. Rel-8) eNB with semi-static UL/DL configuration, the duplex direction of flexible subframes in a cell supporting Rel-12 eIMTA feature can be changed dynamically. A number of signaling options have been extensively discussed during the eIMTA SI phase, including system information block (SIB), paging, radio resource control (RRC), medium access layer (MAC) and Physical layer signaling, characteristic with supporting different traffic adaptation time scales.
- One physical uplink control channel (PUCCH) resource collision issue arising from UL/DL reconfiguration feature, regardless of SIB/paging/RRC/MAC/L1 signaling, was observed. An example of this issue is shown in
FIG. 2 at 200. TDD UL/DL configuration 1 is assumed to be indicated in SystemInformationBlockType1 (SIB1), but the actual TDD UL-DL configuration, is UL/DL configuration 2 as indicated at 210, which is achieved by flexibly changing the transmission direction ofsubframes # 3 and #8 from UL to DL to meet instant traffic conditions and consequently maximize the radio spectrum efficiency as seen inFIG. 3 at 310 and 315 respectively. The DL-reference UL/DL configuration is known by Rel-12 UL/DL reconfiguration capable UE so that UE can utilize the flexible subframe resources. In addition, UE can properly determine the hybrid automatic repeat request-acknowledgement (HARQ-ACK) timeline for physical dedicated shared channel (PDSCH) transmission according to DL-reference UL/DL configuration. In this example, DL-reference UL/DL configuration is assumed to be TDD UL/DL configuration 2. It can be seen that the PUCCH resources associated with the two PDCCHs-PDCCH 1 insubframe # 9 at 215 within radio frame n−1 for UE1 andPDCCH 2 insubframe # 0 at 220 within radio frame n for UE2 are collided in the same PUCCH 1a/1b resource at theUL subframe # 7 at 225 in radio frame n. The reason for this is that the same number of the first control channel element (CCE) index, nCCE,m=6, is used by two PDCCHs and two different PDSCH HARQ-ACK timing relationship are assumed at UE1 and UE2 separately. As a consequence, the implicitly mapped PUCCH resources are exactly the same at two UEs according to the equation below: -
n PUCCH,i (1)=(M−m−1)·N c +m·N c+1 +n CCE,m +N PUCCH (1) - Where nCCE,m is the number of the first CCE used for transmission of the corresponding PDCCH in subframe. This is a common PUCCH resource collision issue for all TDD UL/DL re-configuration signaling methods. Two solutions are proposed to address it.
- In one embodiment, the PDSCH subframes are firstly classified into two types—
Type 1 andType 2. After classification of the subframes, PUCCH resource mapping is performed based on DL subframe types. Additionally, to avoid excessive control overhead, the ARO (i.e. HARQ-ACK resource offset field) may be used to compress the PUCCH region. - There has been no known solution for PUCCH resource mapping scheme for UL-DL reconfiguration supporting in Rel-12, targeting for PUCCH resource mapping collision avoidance.
- In one embodiment, the downlink subframes associated with an uplink subframe for HARQ-ACK feedback are classified into two types (i.e.
Type 1 and Type 2) according to the TDD UL/DL configuration contained in SIB1 message and the DL-reference UL/DL configuration indicated by higher layer signaling as below: -
Type 1 subframes are DL subframes that associated with a UL subframe n for HARQ-ACK feedback according to the SIB1 TDD UL/DL configuration. -
Type 2 subframes are the DL subframes that are constructed with a two-step approach: - Step-1:
Type 2 subframes are DL subframes associated with the UL subframe n for HARQ-ACK feedback according to a higher layer configured DL-reference UL/DL configuration. This configuration can be either implicitly determined based on TDD UL/DL configurations of two consecutive radio frames as documented in previous IDF [1] or explicitly indicated by higher-layer signaling. - Step-2: if the
Type 1 subframes are overlapped with theType 2 subframes that have been constructed in Step-1, the overlapping subframes will be further removed fromType 2 subframes. - In one embodiment as shown in
FIG. 3 at 300, assuming thatTDD configuration 1 is indicated in SIB1, while the DL-reference UL/DL configuration isconfiguration # 2, thenType 1 subframes includesubframe # 1 at 305 and #0 at 310 in radio frame n. While,Type 2 subframes comprise ofsubframe # 3 at 320 in radio frame n andsubframe # 9 at 325 in radio frame n−1. - Solution 1: PUCCH format 1b with Channel Selection (CS). To address the potential PUCCH resource collision issue, one hybrid PUCCH resource mapping method includes the following. Let M denote the number of elements in the set K defined in Table 10.1.3.1-1 in 3GPP Rel. 11 as shown at 400 in
FIG. 4 identifying a downlink association set index K for TDD according to the DL-reference UL/DL configuration. The Set K is further divided into two sets: K1 and K2, each of which is comprised of a number of subframes in set K. The set K1 includes allType 1 subframe and set K2 includes allType 2 subframe. M=M1+M2, where M1 and M2 denotes the number of DL subframes in set K1 and K2 respectively. - Let nPUCCH,i (1) denote the PUCCH resource derived from sub-frame n−ki and HARQ-ACK(i) as the ACK/NACK/DTX response from sub-frame n−ki according to DL-reference UL/DL configuration, where kiεK, and 0≦i≦M−1. Let j denote the position of subframe n−ki within the set K1 in an increasing order of i value from j=0, where 0≦j≦M1−1, and let l denote the position of subframe n−ki within the set K2 in an increasing order of i value from l=0, where 0≦l≦M2−1.
- In one embodiment, assuming SIB1 TDD UL/DL configuration is
configuration 1, and DL-reference UL/DL configuration isconfiguration 2, the corresponding j and l values for DL subframe within set K that associated withsubframe 7 for HARQ-ACK feedback are shown at 500 inFIG. 5 with an example of DL subframe indexing across set K1 at 510 and K2 at 515. - After PDSCH subframes are indexed within the corresponding set, PUCCH resources mapping is performed as follows: For a PDSCH transmission indicated by the detection of corresponding PDCCH or a PDCCH indicating downlink SPS release in subframe n−ki, if it corresponds to
Type 1 subframe j (0≦j≦M1−1), the PUCCH resource -
n PUCCH,j (1)=(M 1 −j−1)·N c +j·N c+1 +n CCE,j +N PUCCH (1) (1-0) - If it corresponds to
Type 2 subframe l (0≦l≦M2−1), the PUCCH resource: -
- Where c is selected from {0, 1, 2, 3} such that Nc≦nCCE,j<Nc+1, Nc≦nCCE,l<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}, NCFI,c is detected Control Formal Indicator (CFI) value carried on Physical Control Format Indicator Channel (PCFICH) channel in subframe c, nCCE,j and nCCE,l is the number of the first CCE used for transmission of the corresponding PDCCH in subframe j and l respectively. Index j is the index of
Type 1 subframe within set K1, and index l is the index ofType 2 subframe within set K2. - NPUCCH (1) is PUCCH resource offset associated with legacy PDCCH that is configured by higher layers for PUCCH resource mapping. NPUCCH (2) is a PUCCH resource offset providing the starting point of the PUCCH resources for
Type 2 subframes, which can be configured by higher layer, either in a UE specific or Cell specific manner, or be calculated using the formula: -
N PUCCH (2) =M 1 ·N 4 (5-0) - This PUCCH Format 1a/1b resource for an HARQ-ACK signal transmission in response to legacy PDCCH-scheduled PDSCH can be further optimized by introducing 2-bits ARO (i.e. HARQ-ACK resource offset field) to avoid excessive control overhead, and considering the fact that dynamic PUCCH format 1a/1b resource space is often underutilized. If UL/DL reconfiguration has been activated for one UE, an explicit 2-bit ARO indication field is always present for all the DL DCI formats that are carried by UE specific search space on legacy PDCCH across all DL subframes, regardless of subframe type. The equation (1-0), (2-0), (3-0) and (4-0) can be straightforwardly extended to (1-1), (2-1), (3-1) and (4-1) by using 2-bits ARO as:
-
- ΔARO is determined based on the value of M as follows: If M=1, ΔARO is determined from the HARQ-ACK resource offset field in the DCI format of the corresponding EPDCCH as given in Table 10.1.2.1-1. If M>1, ΔARO is determined from the HARQ-ACK resource offset field in the DCI format of the corresponding EPDCCH as given in Table 1 at 600 in
FIG. 6 . - UE shall assume the ΔARO=0 for PUCCH resource mapping using equation (1-1) and (2-1) if the corresponding DCI is transmitted on Common Search Space (CSS) on legacy PDCCH in
Type 1 subframe at least. - Several solutions could be considered for the definition of Δ1 or Δ2:
- For
Type 1 subframes: Alternative. 1: 0—same as M=1 case. Alternative 2: -
−(M 1 −j−1)·N c −j·N c+1 Alt 2-0: -
−M 1·(N c −N c−1) Alt 2-1: -
−j·(N c+1 −N c) Alt 2-2: -
−(N c+1 −N c) Alt 2-3: -
−M 1 ·N c Alt 2-4: - One example for
Alternative 2 is shown at 700 inFIG. 7 by assuming that the M1=3. As clearly shown in the Figure, the PUCCH overhead fortype 1 subframes may be flexibly reduced by proper selecting ARO setting at eNB side. - For
Type 2 subframes, all the potential values for Δ1 and Δ2 can be reused by replacing symbol j with symbol l and symbol M1 with M2. Additionally, some extra values may be used in further embodiments: -
-
Alternatives FIG. 8 . - For a PDSCH transmission indicated by the detection of corresponding EPDCCH or a EPDCCH indicating downlink SPS release in sub-frame n−ki where kiεK, the UE shall use if EPDCCH-PRB-set q is configured for distributed transmission:
-
- If EPDCCH-PRB-set q is configured for localised transmission
-
- where nECCE,q is the number of the first ECCE (i.e. lowest ECCE index used to construct the EPDCCH) used for transmission of the corresponding DCI assignment in EPDCCH-PRB-set q in subframe n−ki, NPUCCH,q (e1) for EPDCCH-PRB-set q is configured by the higher layer parameter pucch-ResourceStartOffset-r11, NRB ECCE,q for EPDCCH-PRB-set q in subframe n−ki is given in section 6.8A.1 in 3GPP TS 36.211 V. 11.2.0, n′ is determined from the antenna port used for EPDCCH transmission in subframe n−ki which is described in section 6.8A.5 in 3GPP TS 36.211 V. 11.2.0. If i=0, ΔARO is determined from the HARQ-ACK resource offset field in the DCI format of the corresponding EPDCCH as given in Table 10.1.2.1-1. If i>0, ΔARO is determined from the HARQ-ACK resource offset field in the DCI format of the corresponding EPDCCH as given in Table 10.1.3.1-2, where the variable m in the table is substituted with i. If the UE is configured to monitor EPDCCH in subframe n−ki1, NECCE,q,n-k
i1 is equal to the number of ECCEs in EPDCCH-PRB-set q configured for that UE in subframe n−ki1. If the UE is not configured to monitor EPDCCH in subframe n−ki1, NECCE,q,n-ki1 is equal to the number of ECCEs computed assuming EPDCCH-PRB-set q is configured for that UE in subframe n−ki1. For normal downlink CP, if subframe n−ki1 is a special subframe withspecial subframe configuration i1 is equal to 0. For extended downlink CP, if subframe n−ki1 is a special subframe withspecial subframe configuration i1 is equal to 0. - Considering the fact that in certain configurations, different DL subframes in the bundling window may have different numbers of ECCEs per PRB pair even for the same EPDCCH set k, such as special subframe, etc., and have different minimum aggregation level as well, to avoid the unnecessary PUCCH overhead, the equation (5-0) and (6-0) can be changed to (5-1) and (6-1) below:
-
- Where Li denotes the minimum supportable aggregation level in subframe i.
- In a further embodiment utilizing a second solution,
solution 2, thePUCCH format 3 is used for HARQ-ACK feedback. On the other hand, a different potential solution is that one (e.g. for one antenna port case) or two (e.g. for two antenna ports case) PUCCH format 1a/1b resource(s) are configured by higher layer for UL/DL reconfiguration capable of UE, andPUCCH format 3 is required to be configured for HARQ-ACK transmission after UL/DL reconfiguration is activated for one UE. - For a single PDSCH transmission or downlink SPS release indicated by the detection of a corresponding PDCCH/EPDCCH in subframe n−km, where kmεK, and the DAI value in the PDCCH/EPDCCH is equal to ‘1’, the UE shall use the PUCCH format 1a/1b and the higher-layer configured PUCCH format 1a/1b resource for HARQ-ACK feedback.
- For a single PDSCH transmission where there is not a corresponding PDCCH/EPDCCH detected within subframe(s) n−k, where kεK, and no PDCCH/EPDCCH indicating downlink SPS release within subframe(s) n−k, where kεK, UE shall determine the PUCCH resources according to higher layer configuration and Table 9.2-2.
- Otherwise, UE shall use
PUCCH format 3 and PUCCH resource nPUCCH (3,{tilde over (p)}) where the value of nPUCCH (3,{tilde over (p)}) is determined according to higher layer configuration and Table 10.1.2.2.2-1 shown at 900 inFIG. 9 . If DAI value greater than ‘1’ is indicated in PDCCH, the TPC field in a PDCCH assignment with DAI value greater than ‘1’ shall be used to determine the PUCCH resource value from one of the four PUCCH resource values configured by higher layers, with the mapping defined in Table 10.1.2.2.2-1. - If DAI value greater than ‘1’ is indicated in EPDCCH, the HARQ-ACK resource offset field in the DCI format of the corresponding EPDCCH assignment with DAI value greater than ‘1’ shall be used to determine the PUCCH resource value from one of the four PUCCH resource values configured by higher layers, with the mapping defined in Table 10.1.2.2.2-1.
-
FIG. 10 is a flowchart illustrating amethod 1000 beginning with UE receiving a physical downlink shared channel (PDSCH) transmission at 1010 from a base station. Processing circuitry is used to classify downlink (DL) subframe types at 1020 for a set of DL subframes associated with a first uplink (UL) subframe for transmission of a hybrid automatic report request acknowledgment (HARQ-ACK). The processing circuitry further performs physical uplink control channel (PUCCH) resources mapping at 1030 based on the classified DL subframe Types for an acknowledgement transmission associated with PDSCH transmission reception. -
FIG. 11 is a flowchart illustrating amethod 1100 of classifying the DL subframe Types. At 1110,Type 1 DL subframes that are constructed by DL subframes that are associated with a first uplink (UL) subframe for transmission of HARQ-ACK according to a time division duplex (TDD) UL/DL configuration indicated in a system information block Type 1 (SIB1) message.Type 2 DL subframes are constructed at 1120 by firstly identifying DL subframes that are associated with the first UL subframe for transmission of HARQ-ACK according to a higher layer configured DL-reference UL/DL configuration. If theType 1 DL subframes are overlapped with theType 2 DL subframes, the overlapping subframes betweenType 1 andType 2 DL subframes are further removed from theType 2 DL subframes at 1130. -
FIG. 12 is a flowchart illustrating amethod 1200 of determining the offset forType 1 DL subframes. At 1210, processing circuitry determines the HARQ-ACK offset ΔARO for aType 1 DL subframe based on 2-bits HARQ-ACK resource offset field in the DCI format of the corresponding PDCCH depends on the number ofType 1 DL subframes associated with the first UL subframe for HARQ-ACK transmission. At 1220, processing circuitry begins by selecting a ΔARO value out of {0, −1, −2, 2} if the number ofType 1 DL subframes is one. At 1230, the processing circuitry selects a value out of {0, Δ1−1, Δ2, −2, 2} if the number ofType 1 DL subframes is more than one, where Δ1 or Δ2 could be one of {0, −(M1−j−1)·Nc−j·Nc+1, −M1·(Nc−Nc−1), −j·(Nc+1−Nc), −(Nc+1−Nc), −M1·Nc}, and j(0≦j<M1) is the index of theType 1 DL subframe, and M1 is the number ofType 1 DL subframes, and c is selected from {0, 1, 2, 3} such that Nc≦nCCE,j<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}. -
FIG. 13 is a flowchart illustrating amethod 1300 of determining the offset forType 2 DL subframe. At 1310 processing circuitry is used to determine the HARQ-ACK offset for aType 2 DL subframe based on 2-bits HARQ-ACK resource offset field in the DCI format of the corresponding PDCCH depending on the number ofType 2 DL subframes associated with the first UL subframe for HARQ-ACK transmission. Themethod 1300 processed to select a ΔARO value out of {0, −1, −2, 2} at 1310 if the number ofType 2 DL subframes is one. At 1320, the processing circuitry selects a ΔARO value out of {0, Δ1−1, Δ2−2, 2} if the number ofType 2 DL subframes is more than one, where Δ1 or Δ2 could be one value of -
- and l(0≦l<M2) is the index of the
Type 2 DL subframe, and M1 is the number ofType 1 DL subframes associated with the same first UL subframe for HARQ-ACK transmission and M2 is the number ofType 2 DL subframes, and NPUCCH (1) and NPUCCH (2) is PUCCH resource offset associated with PDSCH onType 1 DL subframes andType 2 DL subframes respectively for PUCCH resource mapping, and c is selected from {0, 1, 2, 3} such that is selected from {0, 1, 2, 3} such that Nc≦nCCE,l<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}, and NCFI,c is detected Control Formal Indicator (CFI) value carried on Physical Control Format Indicator Channel (PCFICH) channel inType 2 subframe c. -
FIG. 14 is a block diagram of a specifically programmed computer system to act as one or more different types of UE, cell stations, including small cell stations and macro stations. The system may be used to implement one or more methods according to the examples described. In the embodiment shown inFIG. 14 , a hardware and operating environment is provided to enable the computer system to execute one or more methods and functions that are described herein. In some embodiments, the system may be a small cell station, macro cell station, smart phone, tablet, or other networked device that can provide access and wireless networking capabilities to one or more devices. Such devices need not have all the components included inFIG. 14 . -
FIG. 14 illustrates a functional block diagram of acell station 1400 in accordance with some embodiments.Cell station 1400 may be suitable for use as a small cell station, macro cell station, or user equipment, such as a wireless cell phone, tablet or other computer. Thecell station 1400 may includephysical layer circuitry 1402 for transmitting and receiving signals to and from eNBs using one or more antennas 1401.Cell station 1400 may also includeprocessing circuitry 1404 that may include, among other things a channel estimator.Cell station 1400 may also includememory 1406. The processing circuitry may be configured to determine several different feedback values discussed below for transmission to the eNB. The processing circuitry may also include a media access control (MAC) layer. - In some embodiments, the
cell station 1400 may include one or more of a keyboard, a display, a non-volatile memory port, multiple antennas, a graphics processor, an application processor, speakers, and other mobile device elements. The display may be an LCD screen including a touch screen. - The one or more antennas 1401 utilized by the
cell station 1400 may comprise one or more directional or omnidirectional antennas, including, for example, dipole antennas, monopole antennas, patch antennas, loop antennas, microstrip antennas or other types of antennas suitable for transmission of RF signals. In some embodiments, instead of two or more antennas, a single antenna with multiple apertures may be used. In these embodiments, each aperture may be considered a separate antenna. In some multiple-input multiple-output (MIMO) embodiments, the antennas may be effectively separated to take advantage of spatial diversity and the different channel characteristics that may result between each of antennas and the antennas of a transmitting station. In some MIMO embodiments, the antennas may be separated by up to 1/10 of a wavelength or more. - Although the
cell station 1400 is illustrated as having several separate functional elements, one or more of the functional elements may be combined and may be implemented by combinations of software-configured elements, such as processing elements including digital signal processors (DSPs), and/or other hardware elements. For example, some elements may comprise one or more microprocessors, DSPs, application specific integrated circuits (ASICs), radio-frequency integrated circuits (RFICs) and combinations of various hardware and logic circuitry for performing at least the functions described herein. In some embodiments, the functional elements may refer to one or more processes operating on one or more processing elements. - Embodiments may be implemented in one or a combination of hardware, firmware and software. Embodiments may also be implemented as instructions stored on a computer-readable storage medium, which may be read and executed by at least one processor to perform the operations described herein. A computer-readable storage medium may include any non-transitory mechanism for storing information in a form readable by a machine (e.g., a computer). For example, a computer-readable storage medium may include read-only memory (ROM), random-access memory (RAM), magnetic disk storage media, optical storage media, flash-memory devices, and other storage devices and media. In these embodiments, one or more processors of the
cell station 1400 may be configured with the instructions to perform the operations described herein. - In some embodiments, the
cell station 1400 may be configured to receive OFDM communication signals over a multicarrier communication channel in accordance with an OFDMA communication technique. The OFDM signals may comprise a plurality of orthogonal subcarriers. In some broadband multicarrier embodiments, evolved node Bs (eNBs) may be part of a broadband wireless access (BWA) network communication network, such as a Worldwide Interoperability for Microwave Access (WiMAX) communication network or a 3rd Generation Partnership Project (3GPP) Universal Terrestrial Radio Access Network (UTRAN) Long-Term-Evolution (LTE) or a Long-Term-Evolution (LTE) communication network, although the scope of the invention is not limited in this respect. In these broadband multicarrier embodiments, thecell station 1400 and the eNBs may be configured to communicate in accordance with an orthogonal frequency division multiple access (OFDMA) technique. The UTRAN LTE standards include the 3rd Generation Partnership Project (3GPP) standards for UTRAN-LTE,release 8, March 2008, andrelease 10, December 2010, including variations and evolutions thereof. - In some LTE embodiments, the basic unit of the wireless resource is the Physical Resource Block (PRB). The PRB may comprise 12 sub-carriers in the frequency domain and N consecutive symbols corresponding to 0.5 ms in the time domain depends on the cyclic prefix length configured by the higher layer parameter. In these embodiments, the PRB may comprise a plurality of resource elements (REs). A RE is uniquely defined by the index pair (k, l) in a slot where k is index in frequency domain and l is the index in the time domain.
- Two types of reference signals may be transmitted by an eNB including demodulation reference signals (DM-RS), a common reference signal (CRS) and/or channel state information reference signals (CSI-RS). The DM-RS may be used by the UE for data demodulation. The reference signals may be transmitted in predetermined PRBs.
- In some embodiments, the OFDMA technique may be either a frequency domain duplexing (FDD) technique that uses different uplink and downlink spectrum or a time-domain duplexing (TDD) technique that uses the same spectrum for uplink and downlink.
- In some other embodiments, the
cell station 1400 and the eNBs may be configured to communicate signals that were transmitted using one or more other modulation techniques such as spread spectrum modulation (e.g., direct sequence code division multiple access (DS-CDMA) and/or frequency hopping code division multiple access (FH-CDMA)), time-division multiplexing (TDM) modulation, and/or frequency-division multiplexing (FDM) modulation, although the scope of the embodiments is not limited in this respect. - In some embodiments, the
cell station 1400 may be part of a portable wireless communication device, such as a personal digital assistant (PDA), a laptop or portable computer with wireless communication capability, a web tablet, a wireless telephone, a wireless headset, a pager, an instant messaging device, a digital camera, an access point, a television, a medical device (e.g., a heart rate monitor, a blood pressure monitor, etc.), or other device that may receive and/or transmit information wirelessly. - In some embodiments, the cell station may be configured in one of 8 “transmission modes” for PDSCH reception: Mode 1: Single antenna port,
port 0; Mode 2: Transmit diversity; Mode 3: Large-delay CDD; Mode 4: Closed-loop spatial multiplexing; Mode 5: MU-MIMO; Mode 6: Closed-loop spatial multiplexing, single layer; Mode 7: Single antenna port, cell station-specific RS (port 5); Mode 8 (new in Rel-9): Single or dual-layer transmission with cell station-specific RS (ports 7 and/or 8). The CSI-RS are used by the cell station for channel estimates (i.e., CQI measurements). In some embodiments, the CSI-RS are transmitted periodically in particular antenna ports (up to eight transmit antenna ports) at different subcarrier frequencies (assigned to the cell station) for use in estimating a MIMO channel. In some embodiments, a cell station-specific demodulation reference signal (e.g., a DM-RS) may be precoded in the same way as the data when non-codebook-based precoding is applied. - 1. A device comprising:
- a transceiver to receive, from a base station, a physical downlink shared channel (PDSCH) transmission; and
- processing circuitry to:
- classify downlink (DL) subframe types for a set of DL subframes associated with a first uplink (UL) subframe for transmission of a hybrid automatic report request acknowledgment (HARQ-ACK); and
- perform physical uplink control channel (PUCCH) resources mapping based on the classified DL subframe Types for an acknowledgement transmission associated with PDSCH transmission reception.
- 2. The device of example 1 wherein the DL subframe types comprise:
-
Type 1 DL subframes that are constructed by DL subframes that are associated with a first uplink (UL) subframe for transmission of HARQ-ACK according to a time division duplex (TDD) UL/DL configuration indicated in a system information block Type 1 (SIB1) message; and -
Type 2 DL subframes that are constructed by: - firstly identifying DL subframes that are associated with the first UL subframe for transmission of HARQ-ACK according to a higher layer configured DL-reference UL/DL configuration, and
- if the
Type 1 DL subframes are overlapped with theType 2 DL subframes, the overlapping subframes betweenType 1 andType 2 DL subframes are further removed from theType 2 DL subframes. - 3. The device of any of examples 1-2, wherein the processing circuitry further performs PUCCH resource mapping for PDSCH transmission indicated via Physical Downlink Control Channel (PDCCH) on a
Type 1 DL subframe based on: -
n PUCCH,j (1)=(M 1 −j−1)·N c +j·N c+1 +n CCE,j +N PUCCH (1) - where NPUCCH (1) is a PUCCH resource offset associated with legacy PDCCH that is configured by higher layer for PUCCH resource mapping of
Type 1 DL subframes, c is selected from {0, 1, 2, 3} such that Nc≦nCCE,j<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36)┘}, NRB DL refers to Downlink bandwidth configuration and Nsc RB refers to resource block size in the frequency domain that is expressed as a number of subcarriers, nCCE,j is the number of the first control channel element (CCE) used for transmission of the corresponding PDCCH inType 1 DL subframe j, and j(0≦j<M1) is the index of theType 1 DL subframe, and M1 is the number ofType 1 DL subframes. - 4. The device of example 3, wherein the processing circuitry further performs PUCCH resource mapping for PDSCH transmission indicated via PDCCH on a
Type 1 DL subframe based on: -
n PUCCH,j (1)=(M 1 −j−1)·N c +j·N c+1 +n CCE,j +N PUCCH (1)+ΔARO - Where j(0≦j<M1) is the index of the
Type 1 DL subframe, and ΔARO refers to HARQ-ACK resource offset value that is selected from predefined values based on 2-bits HARQ-ACK resource offset field in a downlink control information (DCI) format depending on the number ofType 1 DL subframes associated with the first UL subframe for HARQ-ACK transmission. - 5. The device of example 4, wherein the processing circuitry further performs determining the HARQ-ACK offset ΔARO for a
Type 1 DL subframe based on 2-bits HARQ-ACK resource offset field in the DCI format of the corresponding PDCCH depending on the number ofType 1 DL subframes associated with the first UL subframe for HARQ-ACK transmission: - selecting a ΔARO value out of {0, −1, −2, 2} if the number of
Type 1 DL subframes is one; and - selecting a value out of {0, Δ1−1, Δ2−2, 2} if the number of
Type 1 DL subframes is more than one, where Δ1 or Δ2 could be one of {0, −(M1−j−1)·Nc−j·Nc+1, −M1·(Nc−Nc−1), −j·(Nc+1−Nc), −(Nc+1−Nc), −M1·Nc}, and j(0≦j<M1) is the index of theType 1 DL subframe, and M1 is the number ofType 1 DL subframes, and c is selected from {0, 1, 2, 3} such that Nc≦nCCE,j<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}. - 6. The device of any of examples 1-5, wherein the processing circuitry further performs PUCCH resource mapping for PDSCH transmission indicated via Physical Downlink Control Channel (PDCCH) on a
Type 2 DL subframe based on higher-layer signaling or based on: -
- where NPUCCH (2) is PUCCH resource offset associated with PDSCH on
Type 2 DL subframes for PUCCH resource mapping, and c is selected from {0, 1, 2, 3} such that Nc≦nCCE,l<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}, NRB DL refers to downlink bandwidth configuration and NB refers to resource block size in the frequency domain that is expressed as a number of subcarriers. nCCE,l is the number of the first channel control element (CCE) used for transmission of the corresponding PDCCH inType 2 DL subframe l, and l(0≦l<M2) is the index of aType 2 DL subframe and M2 is the number ofType 2 DL subframes, and NCFI,c is detected Control Formal Indicator (CFI) value carried on Physical Control Format Indicator Channel (PCFICH) channel inType 2 subframe c. - 7. The device of example 6 wherein the PUCCH resource offset NPUCCH (2) are configured by higher layer signal in a user equipment specific manner or a Cell-specific manner, or determined based on:
-
N PUCCH (2) =M 1 ·N 4 - where M1 is a number of
Type 1 DL subframes associated with the first UL subframe for HARQ-ACK transmission, and N4 refers to PUCCH resources reserved for aType 1 DL subframe and is calculated according to Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}. - 8. The device of example 6, wherein the processing circuitry further performs PUCCH resource mapping for PDSCH transmission on a
Type 2 DL subframe via PDCCH based on: -
- where l(0≦l<M2) is the index of the
Type 2 DL subframe, and ΔARO refers to HARQ-ACK resource offset value that is selected based on 2-bits HARQ-ACK resource offset field in a downlink control information (DCI) format depending on the number ofType 2 DL subframes associated with the first UL subframe for HARQ-ACK transmission. - 9. The device of example 8, wherein the processing circuitry further performs determining the HARQ-ACK offset for a
Type 2 DL subframe based on 2-bits HARQ-ACK resource offset field in the DCI format of the corresponding PDCCH depending on the number ofType 2 DL subframes associated with the first UL subframe for HARQ-ACK transmission: - selecting a ΔARO value out of {0, −1, −2, 2} if the number of
Type 2 DL subframes is one. - selecting a ΔARO value out of {0, Δ1−1, Δ2−2, 2} if the number of
Type 2 DL subframes is more than one, where Δ1 or Δ2 could be one value of -
- and l(0≦l<M2) is the index of the
Type 2 DL subframe, and M1 is the number ofType 1 DL subframes associated with the same first UL subframe for HARQ-ACK transmission and M2 is the number ofType 2 DL subframes, and NPUCCH (1) and NPUCCH (2) is PUCCH resource offset associated with PDSCH onType 1 DL subframes andType 2 DL subframes respectively for PUCCH resource mapping, and c is selected from {0, 1, 2, 3} such that is selected from {0, 1, 2, 3} such that Nc≦nCCE,l<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}, and NCFI,c is detected Control Formal Indicator (CFI) value carried on Physical Control Format Indicator Channel (PCFICH) channel inType 2 subframe c. - 10. The device of any of examples 1-9, wherein the processing circuitry further performs PUCCH resource mapping for PDSCH transmission indicated via enhanced physical downlink control channel (EPDCCH) or a EPDCCH indicating downlink semi persistent scheduling (SPS) release in a
Type 1 orType 2 sub-frame, the user equipment (UE) shall use: -
- if EPDCCH-physical resource block (PRB)-set q is configured for distributed transmission, or
-
- if EPDCCH-PRB-set q is configured for localised transmission where nECCE,q is the number of the first ECCE (i.e. lowest ECCE index used to construct the EPDCCH) used for transmission of a corresponding downlink control information (DCI) assignment in EPDCCH-PRB-set q in subframe n−ki, NPUCCH,q (e1) for EPDCCH-PRB-set q is configured by the higher layer parameter pucch-ResourceStartOffset-r11, NRB ECCE,q for EPDCCH-PRB-set q in subframe n−ki is given, and n′ is determined from the antenna port used for EPDCCH transmission in subframe n−ki, and ΔARO is the HARQ-ACK resource offset.
- 11. The device of example 10, wherein the processing circuitry further performs PUCCH resource mapping for PDSCH transmission indicated via EPDCCH or EPDCCH indicating downlink SPS release in a
Type 1 orType 2 sub-frame, the user equipment (UE) shall use: -
- where Li denotes the minimum supportable aggregation level in subframe i.
- 12. A method comprising:
- receiving from a base station via a transceiver, a physical downlink shared channel (PDSCH) transmission;
- classifying, via processing circuitry, downlink (DL) subframe types for a set of DL subframes associated with a first uplink (UL) subframe for transmission of a hybrid automatic report request acknowledgment (HARQ-ACK); and
- performing physical uplink control channel (PUCCH) resources mapping based on the classified DL subframe Types for an acknowledgement transmission associated with PDSCH transmission reception.
- 13. The method of example 12 wherein the DL subframe types comprise:
-
Type 1 DL subframes that are constructed by DL subframes that are associated with a first uplink (UL) subframe for transmission of HARQ-ACK according to a time division duplex (TDD) UL/DL configuration indicated in a system information block Type 1 (SIB1) message; and -
Type 2 DL subframes that are constructed by: - firstly identifying DL subframes that are associated with the first UL subframe for transmission of HARQ-ACK according to a higher layer configured DL-reference UL/DL configuration; and
- if the
Type 1 DL subframes are overlapped with theType 2 DL subframes, the overlapping subframes betweenType 1 andType 2 DL subframes are further removed from theType 2 DL subframes. - 14. The method of any of examples 12-13, further comprising performing PUCCH resource mapping for PDSCH transmission indicated via Physical Downlink Control Channel (PDCCH) on a
Type 1 DL subframe based on: -
N PUCCH,j (1)=(M 1 −j−1)·N c +j·N c+1 +n CCE,j +N PUCCH (1) - where NPUCCH (1) is a PUCCH resource offset associated with legacy PDCCH that is configured by higher layer for PUCCH resource mapping of
Type 1 DL subframes, c is selected from {0, 1, 2, 3} such that Nc≦nCCE,j<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}, NRB DL refers to downlink bandwidth configuration and Nsc RB refers to resource block size in the frequency domain that is expressed as a number of subcarriers, nCCE,j is the number of the first control channel element (CCE) used for transmission of the corresponding PDCCH inType 1 DL subframe j, and j(0≦j<M1) is the index of theType 1 DL subframe, and M1 is the number ofType 1 DL subframes. - 15. The method of example 14, further comprising performing PUCCH resource mapping for PDSCH transmission indicated via PDCCH on a
Type 1 DL subframe based on: -
n PUCCH,j (1)=(M 1 −j−1)·N c +j·N c+1 +n CCE,j +N PUCCH (1)+ΔARO - where j(0≦j<M1) is the index of the
Type 1 DL subframe, and ΔARO refers to HARQ-ACK resource offset value that is selected from predefined values based on 2-bits HARQ-ACK resource offset field in a downlink control information (DCI) format depending on the number ofType 1 DL subframes associated with the first UL subframe for HARQ-ACK transmission. - 16. The method of example 15, further comprising determining the HARQ-ACK offset ΔARO for a
Type 1 DL subframe based on 2-bits HARQ-ACK resource offset field in the DCI format of the corresponding PDCCH depending on the number ofType 1 DL subframes associated with the first UL subframe for HARQ-ACK transmission: - selecting a ΔARO value out of {0, −1, −2, 2} if the number of
Type 1 DL subframes is one; and - selecting a value out of {0, Δ1−1, Δ2−2, 2} if the number of
Type 1 DL subframes is more than one, where Δ1 or Δ2 could be one of {0, −(M1−j−1)·Nc−j·Nc+1, −M1·(Nc−Nc−1), −j·(Nc+1−Nc), −(Nc+1−Nc), −M1·Nc}, and j(0≦j<M1) is the index of theType 1 DL subframe, and M1 is the number ofType 1 DL subframes, and c is selected from {0, 1, 2, 3} such that Nc≦nCCE,j<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}. - 17. The method of any of examples 12-16, further comprising performing PUCCH resource mapping for PDSCH transmission indicated via Physical Downlink Control Channel (PDCCH) on a
Type 2 DL subframe based on higher-layer signaling or based on: -
- where NPUCCH (2) is PUCCH resource offset associated with PDSCH on
Type 2 DL subframes for PUCCH resource mapping, and c is selected from {0, 1, 2, 3} such that Nc≦nCCE,l<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}, NRB DL refers to downlink bandwidth configuration and N refers to resource block size in the frequency domain that is expressed as a number of subcarriers. nCCE,l is the number of the first channel control element (CCE) used for transmission of the corresponding PDCCH inType 2 DL subframe l, and l(0≦l<M2) is the index of aType 2 DL subframe and M2 is the number ofType 2 DL subframes, and NCFI,c is detected Control Formal Indicator (CFI) value carried on Physical Control Format Indicator Channel (PCFICH) channel inType 2 subframe c. - 18. The method of example 17 wherein the PUCCH resource offset NPUCCH (2) are configured by higher layer signal in a user equipment specific manner or a Cell-specific manner, or determined based on:
-
N PUCCH (2) =M 1 ·N 4 - where M1 is a number of
Type 1 DL subframes associated with the first UL subframe for HARQ-ACK transmission, and N4 refers to PUCCH resources reserved for aType 1 DL subframe and is calculated according to Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}. - 19. The method of example 17, further comprising performing PUCCH resource mapping for PDSCH transmission on a
Type 2 DL subframe via PDCCH based on: -
- where l(0≦l<M2) is the index of the
Type 2 DL subframe, and ΔARO refers to HARQ-ACK resource offset value that is selected based on 2-bits HARQ-ACK resource offset field in a downlink control information (DCI) format depending on the number ofType 2 DL subframes associated with the first UL subframe for HARQ-ACK transmission. - 20. The method of example 19, further comprising determining the HARQ-ACK offset for a
Type 2 DL subframe based on 2-bits HARQ-ACK resource offset field in the DCI format of the corresponding PDCCH depending on the number ofType 2 DL subframes associated with the first UL subframe for HARQ-ACK transmission: - selecting a ΔARO value out of {0, −1, −2, 2} if the number of
Type 2 DL subframes is one. - selecting a ΔARO value out of {0, Δ1−1, Δ2−2, 2} if the number of
Type 2 DL subframes is more than one, where Δ1 or Δ2 could be one value of -
- and l(0≦l<M2) is the index of the
Type 2 DL subframe, and M1 is the number ofType 1 DL subframes associated with the same first UL subframe for HARQ-ACK transmission and M2 is the number ofType 2 DL subframes, and NPUCCH (1) and NPUCCH (2) is PUCCH resource offset associated with PDSCH onType 1 DL subframes andType 2 DL subframes respectively for PUCCH resource mapping, and c is selected from {0, 1, 2, 3} such that is selected from {0, 1, 2, 3} such that Nc≦nCCE,l<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}, and NCFI,c is detected Control Formal Indicator (CFI) value carried on Physical Control Format Indicator Channel (PCFICH) channel inType 2 subframe c. - 21. The method of any of examples 12-20, further comprising performing PUCCH resource mapping for PDSCH transmission indicated via enhanced physical downlink control channel (EPDCCH) or a EPDCCH indicating downlink semi persistent scheduling (SPS) release in a
Type 1 orType 2 sub-frame, the user equipment (UE) shall use: -
- if EPDCCH-physical resource block (PRB)-set q is configured for distributed transmission, or
-
- if EPDCCH-PRB-set q is configured for localised transmission where nECCE,q is the number of the first ECCE (i.e. lowest ECCE index used to construct the EPDCCH) used for transmission of a corresponding downlink control information (DCI) assignment in EPDCCH-PRB-set q in subframe n−ki, NPUCCH,q (e1) for EPDCCH-PRB-set q is configured by the higher layer parameter pucch-ResourceStartOffset-r11, NRB ECCE,q for EPDCCH-PRB-set q in subframe n−ki is given, and n′ is determined from the antenna port used for EPDCCH transmission in subframe n−ki, and ΔARO is the HARQ-ACK resource offset.
- 22. The method of example 21, further comprising performing PUCCH resource mapping for PDSCH transmission indicated via EPDCCH or EPDCCH indicating downlink SPS release in a
Type 1 orType 2 sub-frame, the user equipment (UE) shall use: -
- where Li denotes the minimum supportable aggregation level in subframe i.
- 23. A machine readable storage device having instructions to cause a machine to:
- receive from a base station via a transceiver, a physical downlink shared channel (PDSCH) transmission;
- classify, via processing circuitry, downlink (DL) subframe types for a set of DL subframes associated with a first uplink (UL) subframe for transmission of a hybrid automatic report request acknowledgment (HARQ-ACK); and
- perform physical uplink control channel (PUCCH) resources mapping based on the classified DL subframe Types for an acknowledgement transmission associated with PDSCH transmission reception.
- 24. The machine readable storage device of example 23 wherein the DL subframe types comprise:
-
Type 1 DL subframes that are constructed by DL subframes that are associated with a first uplink (UL) subframe for transmission of HARQ-ACK according to a time division duplex (TDD) UL/DL configuration indicated in a system information block Type 1 (SIB1) message; and -
Type 2 DL subframes that are constructed by: - firstly identifying DL subframes that are associated with the first UL subframe for transmission of HARQ-ACK according to a higher layer configured DL-reference UL/DL configuration; and
- if the
Type 1 DL subframes are overlapped with theType 2 DL subframes, the overlapping subframes betweenType 1 andType 2 DL subframes are further removed from theType 2 DL subframes. - Although a few embodiments have been described in detail above, other modifications are possible. For example, the logic flows depicted in the figures do not require the particular order shown, or sequential order, to achieve desirable results. Other steps may be provided, or steps may be eliminated, from the described flows, and other components may be added to, or removed from, the described systems. Other embodiments may be within the scope of the following claims.
Claims (24)
1. A device comprising:
a transceiver to receive, from a base station, a physical downlink shared channel (PDSCH) transmission; and
processing circuitry to:
classify downlink (DL) subframe types for a set of DL subframes associated with a first uplink (UL) subframe for transmission of a hybrid automatic report request acknowledgment (HARQ-ACK); and
perform physical uplink control channel (PUCCH) resources mapping based on the classified DL subframe Types for an acknowledgement transmission associated with PDSCH transmission reception.
2. The device of claim 1 wherein the DL subframe types comprise:
Type 1 DL subframes that are constructed by DL subframes that are associated with a first uplink (UL) subframe for transmission of HARQ-ACK according to a time division duplex (TDD) UL/DL configuration indicated in a system information block Type 1 (SIB1) message; and
Type 2 DL subframes that are constructed by:
firstly identifying DL subframes that are associated with the first UL subframe for transmission of HARQ-ACK according to a higher layer configured DL-reference UL/DL configuration; and
if the Type 1 DL subframes are overlapped with the Type 2 DL subframes, the overlapping subframes between Type 1 and Type 2 DL subframes are further removed from the Type 2 DL subframes.
3. The device of claim 1 , wherein the processing circuitry further performs PUCCH resource mapping for PDSCH transmission indicated via Physical Downlink Control Channel (PDCCH) on a Type 1 DL subframe based on:
n PUCCH,j (1)=(M 1 <j−1)·N c +j·N c+1 +n CCE,j +N PUCCH (1)
n PUCCH,j (1)=(M 1 <j−1)·N c +j·N c+1 +n CCE,j +N PUCCH (1)
where NPUCCH (1) is a PUCCH resource offset associated with legacy PDCCH that is configured by higher layer for PUCCH resource mapping of Type 1 DL subframes, c is selected from {0, 1, 2, 3} such that Nc≦nCCE,j<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}, NRB DL refers to Downlink bandwidth configuration and Nsc RB refers to resource block size in the frequency domain that is expressed as a number of subcarriers, nCCE,j is the number of the first control channel element (CCE) used for transmission of the corresponding PDCCH in Type 1 DL subframe j, and j(0≦j<M1) is the index of the Type 1 DL subframe, and M1 is the number of Type 1 DL subframes.
4. The device of claim 3 , wherein the processing circuitry further performs PUCCH resource mapping for PDSCH transmission indicated via PDCCH on a Type 1 DL subframe based on:
N PUCCH,j (1)=(M 1 −j−1)·N c +j·N c+1 +n CCE,j +N PUCCH (1)+ΔARO
N PUCCH,j (1)=(M 1 −j−1)·N c +j·N c+1 +n CCE,j +N PUCCH (1)+ΔARO
Where j(0≦j<M1) is the index of the Type 1 DL subframe, and ΔARO refers to HARQ-ACK resource offset value that is selected from predefined values based on 2-bits HARQ-ACK resource offset field in a downlink control information (DCI) format depending on the number of Type 1 DL subframes associated with the first UL subframe for HARQ-ACK transmission.
5. The device of claim 4 , wherein the processing circuitry further performs determining the HARQ-ACK offset ΔARO for a Type 1 DL subframe based on 2-bits HARQ-ACK resource offset field in the DCI format of the corresponding PDCCH depending on the number of Type 1 DL subframes associated with the first UL subframe for HARQ-ACK transmission:
selecting a ΔARO value out of {0, −1, −2, 2} if the number of Type 1 DL subframes is one; and
selecting a value out of {0, Δ1−1, Δ2−2, 2} if the number of Type 1 DL subframes is more than one, where Δ1 or Δ2 could be one of {0, −(M1−j−1)·Nc−j·Nc+1, −M1·(Nc−Nc−1), −j·(Nc+1−Nc), −(Nc+1−Nc), −M1·Nc}, and j(0≦j<M1) is the index of the Type 1 DL subframe, and M1 is the number of Type 1 DL subframes, and c is selected from {0, 1, 2, 3} such that Nc≦nCCE,j<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}.
6. The device of claim 1 , wherein the processing circuitry further performs PUCCH resource mapping for PDSCH transmission indicated via Physical Downlink Control Channel (PDCCH) on a Type 2 DL subframe based on higher-layer signaling or based on:
where NPUCCH (2) is PUCCH resource offset associated with PDSCH on Type 2 DL subframes for PUCCH resource mapping, and c is selected from {0, 1, 2, 3} such that Nc≦nCCE,l<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}, NRB DL refers to downlink bandwidth configuration and Nsc RB refers to resource block size in the frequency domain that is expressed as a number of subcarriers. nCCE,l is the number of the first channel control element (CCE) used for transmission of the corresponding PDCCH in Type 2 DL subframe l, and l(0≦l<M2) is the index of a Type 2 DL subframe and M2 is the number of Type 2 DL subframes, and NCFI,c is detected Control Formal Indicator (CFI) value carried on Physical Control Format Indicator Channel (PCFICH) channel in Type 2 subframe c.
7. The device of claim 6 wherein the PUCCH resource offset NPUCCH (2) are configured by higher layer signal in a user equipment specific manner or a Cell-specific manner, or determined based on:
N PUCCH (2) =M 1 ·N 4
N PUCCH (2) =M 1 ·N 4
where M1 is a number of Type 1 DL subframes associated with the first UL subframe for HARQ-ACK transmission, and N4 refers to PUCCH resources reserved for a Type 1 DL subframe and is calculated according to Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}.
8. The device of claim 6 , wherein the processing circuitry further performs PUCCH resource mapping for PDSCH transmission on a Type 2 DL subframe via PDCCH based on:
where l(0≦l<M2) is the index of the Type 2 DL subframe, and ΔARO refers to HARQ-ACK resource offset value that is selected based on 2-bits HARQ-ACK resource offset field in a downlink control information (DCI) format depending on the number of Type 2 DL subframes associated with the first UL subframe for HARQ-ACK transmission.
9. The device of claim 8 , wherein the processing circuitry further performs determining the HARQ-ACK offset for a Type 2 DL subframe based on 2-bits HARQ-ACK resource offset field in the DCI format of the corresponding PDCCH depending on the number of Type 2 DL subframes associated with the first UL subframe for HARQ-ACK transmission:
selecting a ΔARO value out of {0, −1, −2, 2} if the number of Type 2 DL subframes is one.
selecting a ΔARO value out of {0, Δ1−1, Δ2−2, 2} if the number of Type 2 DL subframes is more than one, where Δ1 or Δ2 could be one value of
and l(0≦l<M2) is the index of the Type 2 DL subframe, and M1 is the number of Type 1 DL subframes associated with the same first UL subframe for HARQ-ACK transmission and M2 is the number of Type 2 DL subframes, and NPUCCH (1) and NPUCCH (2) is PUCCH resource offset associated with PDSCH on Type 1 DL subframes and Type 2 DL subframes respectively for PUCCH resource mapping, and c is selected from {0, 1, 2, 3} such that is selected from {0, 1, 2, 3} such that Nc≦nCCE,l<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}, and NCFI,c is detected Control Formal Indicator (CFI) value carried on Physical Control Format Indicator Channel (PCFICH) channel in Type 2 subframe c.
10. The device of claim 1 , wherein the processing circuitry further performs PUCCH resource mapping for PDSCH transmission indicated via enhanced physical downlink control channel (EPDCCH) or a EPDCCH indicating downlink semi persistent scheduling (SPS) release in a Type 1 or Type 2 sub-frame, the user equipment (UE) shall use:
if EPDCCH-physical resource block (PRB)-set q is configured for distributed transmission, or
if EPDCCH-PRB-set q is configured for localised transmission where nECCE,q is the number of the first ECCE (i.e. lowest ECCE index used to construct the EPDCCH) used for transmission of a corresponding downlink control information (DCI) assignment in EPDCCH-PRB-set q in subframe n−ki, NPUCCH,q (e1) for EPDCCH-PRB-set q is configured by the higher layer parameter pucch-ResourceStartOffset-r11, NRB ECCE,q for EPDCCH-PRB-set q in subframe n−ki is given, and n′ is determined from the antenna port used for EPDCCH transmission in subframe n−ki, and ΔARO is the HARQ-ACK resource offset.
11. The device of claim 10 , wherein the processing circuitry further performs PUCCH resource mapping for PDSCH transmission indicated via EPDCCH or EPDCCH indicating downlink SPS release in a Type 1 or Type 2 sub-frame, the user equipment (UE) shall use:
where Li denotes the minimum supportable aggregation level in subframe i.
12. A method comprising:
receiving from a base station via a transceiver, a physical downlink shared channel (PDSCH) transmission;
classifying, via processing circuitry, downlink (DL) subframe types for a set of DL subframes associated with a first uplink (UL) subframe for transmission of a hybrid automatic report request acknowledgment (HARQ-ACK); and
performing physical uplink control channel (PUCCH) resources mapping based on the classified DL subframe Types for an acknowledgement transmission associated with PDSCH transmission reception.
13. The method of claim 12 wherein the DL subframe types comprise:
Type 1 DL subframes that are constructed by DL subframes that are associated with a first uplink (UL) subframe for transmission of HARQ-ACK according to a time division duplex (TDD) UL/DL configuration indicated in a system information block Type 1 (SIB1) message; and
Type 2 DL subframes that are constructed by:
firstly identifying DL subframes that are associated with the first UL subframe for transmission of HARQ-ACK according to a higher layer configured DL-reference UL/DL configuration; and
if the Type 1 DL subframes are overlapped with the Type 2 DL subframes, the overlapping subframes between Type 1 and Type 2 DL subframes are further removed from the Type 2 DL subframes.
14. The method of claim 12 , further comprising performing PUCCH resource mapping for PDSCH transmission indicated via Physical Downlink Control Channel (PDCCH) on a Type 1 DL subframe based on:
n PUCCH,j (1)=(M 1 −j−1)·N c +j·N c+1 +n CCE,j +N PUCCH (1)
n PUCCH,j (1)=(M 1 −j−1)·N c +j·N c+1 +n CCE,j +N PUCCH (1)
where NPUCCH (1) is a PUCCH resource offset associated with legacy PDCCH that is configured by higher layer for PUCCH resource mapping of Type 1 DL subframes, c is selected from {0, 1, 2, 3} such that Nc≦nCCE,j<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}, NRB DL refers to downlink bandwidth configuration and Nsc RB refers to resource block size in the frequency domain that is expressed as a number of subcarriers, nCCE,j is the number of the first control channel element (CCE) used for transmission of the corresponding PDCCH in Type 1 DL subframe j, and j(0≦j<M1) is the index of the Type 1 DL subframe, and M1 is the number of Type 1 DL subframes.
15. The method of claim 14 , further comprising performing PUCCH resource mapping for PDSCH transmission indicated via PDCCH on a Type 1 DL subframe based on:
n PUCCH,j (1)=(M 1 −j−1)·N c +j·N c+1 +n CCE,j +N PUCCH (1)+ΔARO
n PUCCH,j (1)=(M 1 −j−1)·N c +j·N c+1 +n CCE,j +N PUCCH (1)+ΔARO
where j(0≦j<M1) is the index of the Type 1 DL subframe, and ΔARO refers to HARQ-ACK resource offset value that is selected from predefined values based on 2-bits HARQ-ACK resource offset field in a downlink control information (DCI) format depending on the number of Type 1 DL subframes associated with the first UL subframe for HARQ-ACK transmission.
16. The method of claim 15 , further comprising determining the HARQ-ACK offset ΔARO for a Type 1 DL subframe based on 2-bits HARQ-ACK resource offset field in the DCI format of the corresponding PDCCH depending on the number of Type 1 DL subframes associated with the first UL subframe for HARQ-ACK transmission:
selecting a ΔARO value out of {0, −1, −2, 2} if the number of Type 1 DL subframes is one; and
selecting a value out of {0, Δ1−1, Δ2−2, 2} if the number of Type 1 DL subframes is more than one, where Δ1 or Δ2 could be one of {0, −(M1−j−1)·Nc−j·Nc+1, −M1·(Nc−Nc−1), −j·(Nc+1−Nc), −(Nc+1−Nc), −M1·Nc}, and j(0≦j<M1) is the index of the Type 1 DL subframe, and M1 is the number of Type 1 DL subframes, and c is selected from {0, 1, 2, 3} such that Nc≦nCCE,j<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}.
17. The method of claim 12 , further comprising performing PUCCH resource mapping for PDSCH transmission indicated via Physical Downlink Control Channel (PDCCH) on a Type 2 DL subframe based on higher-layer signaling or based on:
where NPUCCH (2) is PUCCH resource offset associated with PDSCH on Type 2 DL subframes for PUCCH resource mapping, and c is selected from {0, 1, 2, 3} such that Nc≦nCCE,l<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}, NRB DL refers to downlink bandwidth configuration and Nsc RB refers to resource block size in the frequency domain that is expressed as a number of subcarriers. nCCE,l is the number of the first channel control element (CCE) used for transmission of the corresponding PDCCH in Type 2 DL subframe l, and l(0≦l<M2) is the index of a Type 2 DL subframe and M2 is the number of Type 2 DL subframes, and NCFI,c is detected Control Formal Indicator (CFI) value carried on Physical Control Format Indicator Channel (PCFICH) channel in Type 2 subframe c.
18. The method of claim 17 wherein the PUCCH resource offset NPUCCH (2) are configured by higher layer signal in a user equipment specific manner or a Cell-specific manner, or determined based on:
N PUCCH (2) =M 1 ·N 4
N PUCCH (2) =M 1 ·N 4
where M1 is a number of Type 1 DL subframes associated with the first UL subframe for HARQ-ACK transmission, and N4 refers to PUCCH resources reserved for a Type 1 DL subframe and is calculated according to Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}.
19. The method of claim 17 , further comprising performing PUCCH resource mapping for PDSCH transmission on a Type 2 DL subframe via PDCCH based on:
where l(0<l<M2) is the index of the Type 2 DL subframe, and ΔARO refers to HARQ-ACK resource offset value that is selected based on 2-bits HARQ-ACK resource offset field in a downlink control information (DCI) format depending on the number of Type 2 DL subframes associated with the first UL subframe for HARQ-ACK transmission.
20. The method of claim 19 , further comprising determining the HARQ-ACK offset for a Type 2 DL subframe based on 2-bits HARQ-ACK resource offset field in the DCI format of the corresponding PDCCH depending on the number of Type 2 DL subframes associated with the first UL subframe for HARQ-ACK transmission:
selecting a ΔARO value out of {0, −1, −2, 2} if the number of Type 2 DL subframes is one.
selecting a ΔARO value out of {0, Δ1−1, Δ2−2, 2} if the number of Type 2 DL subframes is more than one, where Δ1 or Δ2 could be one value of
and l(0≦l<M2) is the index of the Type 2 DL subframe, and M1 is the number of Type 1 DL subframes associated with the same first UL subframe for HARQ-ACK transmission and M2 is the number of Type 2 DL subframes, and NPUCCH (1) and NPUCCH (2) is PUCCH resource offset associated with PDSCH on Type 1 DL subframes and Type 2 DL subframes respectively for PUCCH resource mapping, and c is selected from {0, 1, 2, 3} such that is selected from {0, 1, 2, 3} such that Nc≦nCCE,l<Nc+1, Nc=max{0,└[NRB DL·(Nsc RB·c−4)]/36┘}, and NCFI,c is detected Control Formal Indicator (CFI) value carried on Physical Control Format Indicator Channel (PCFICH) channel in Type 2 subframe c.
21. The method of claim 12 , further comprising performing PUCCH resource mapping for PDSCH transmission indicated via enhanced physical downlink control channel (EPDCCH) or a EPDCCH indicating downlink semi persistent scheduling (SPS) release in a Type 1 or Type 2 sub-frame, the user equipment (UE) shall use:
if EPDCCH-physical resource block (PRB)-set q is configured for distributed transmission, or
if EPDCCH-PRB-set q is configured for localised transmission where nECCE,q is the number of the first ECCE (i.e. lowest ECCE index used to construct the EPDCCH) used for transmission of a corresponding downlink control information (DCI) assignment in EPDCCH-PRB-set q in subframe n−ki, NPUCCH,q (e1) for EPDCCH-PRB-set q is configured by the higher layer parameter pucch-ResourceStartOffset-r11, NRB ECCE,q for EPDCCH-PRB-set q in subframe n−ki is given, and n′ is determined from the antenna port used for EPDCCH transmission in subframe n−ki, and ΔARO is the HARQ-ACK resource offset.
22. The method of claim 21 , further comprising performing PUCCH resource mapping for PDSCH transmission indicated via EPDCCH or EPDCCH indicating downlink SPS release in a Type 1 or Type 2 sub-frame, the user equipment (UE) shall use:
where Li denotes the minimum supportable aggregation level in subframe i.
23. A machine readable storage device having instructions to cause a machine to:
receive from a base station via a transceiver, a physical downlink shared channel (PDSCH) transmission;
classify, via processing circuitry, downlink (DL) subframe types for a set of DL subframes associated with a first uplink (UL) subframe for transmission of a hybrid automatic report request acknowledgment (HARQ-ACK); and
perform physical uplink control channel (PUCCH) resources mapping based on the classified DL subframe Types for an acknowledgement transmission associated with PDSCH transmission reception.
24. The machine readable storage device of claim 23 wherein the DL subframe types comprise:
Type 1 DL subframes that are constructed by DL subframes that are associated with a first uplink (UL) subframe for transmission of HARQ-ACK according to a time division duplex (TDD) UL/DL configuration indicated in a system information block Type 1 (SIB1) message; and
Type 2 DL subframes that are constructed by:
firstly identifying DL subframes that are associated with the first UL subframe for transmission of HARQ-ACK according to a higher layer configured DL-reference UL/DL configuration; and
if the Type 1 DL subframes are overlapped with the Type 2 DL subframes, the overlapping subframes between Type 1 and Type 2 DL subframes are further removed from the Type 2 DL subframes.
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US11101943B2 (en) * | 2017-01-13 | 2021-08-24 | Samsung Electronics Co., Ltd. | Method and apparatus for transmitting UCI in wireless communication system |
US10644765B2 (en) * | 2017-10-24 | 2020-05-05 | Intel Corporation | Enhanced acknowledgment and power saving for wireless communications |
US10873374B2 (en) * | 2017-10-24 | 2020-12-22 | Intel Corporation | Enhanced acknowledgment and power saving for wireless communications |
US11184058B2 (en) * | 2017-10-24 | 2021-11-23 | Intel Corporation | Enhanced acknowledgment and power saving for wireless communications |
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