Source: http://patents.com/us-10349438.html
Timestamp: 2019-09-22 12:30:07
Document Index: 777266630

Matched Legal Cases: ['art 800', 'art 900', 'art 800', 'art 900', 'art 900', 'art 900', 'art 950', 'art 800', 'art 950', 'art 950', 'art 950', 'art 1000', 'art 800', 'art 1000', 'art 1000', 'art 1000', 'art 1050', 'art 800', 'art 1050', 'art 1050', 'art 1050', 'art 1300', 'art 1400', 'art 1300', 'art 1400', 'art 1400', 'art 1400', 'art 1450', 'art 1300', 'art 1450', 'art 1450', 'art 1450', 'art 1500', 'art 1300', 'art 1500', 'art 1500', 'art 1500', 'art 1550', 'art 1300', 'art 1550', 'art 1550', 'art 1550']

US Patent # 1,034,9438. Scheduling enhancements for contention-based shared frequency spectrum - Patents.com
United States Patent 10,349,438
Yerramalli , et al. July 9, 2019
Yerramalli; Srinivas (San Diego, CA), Luo; Tao (San Diego, CA), Chen; Wanshi (San Diego, CA)
Family ID: 1000004139034
15/061,953
US 20160278118 A1 Sep 22, 2016
62134487 Mar 17, 2015
Current CPC Class: H04W 72/14 (20130101); H04L 5/001 (20130101); H04W 24/08 (20130101); H04W 72/042 (20130101); H04W 72/1268 (20130101); H04W 72/1273 (20130101); H04W 72/1294 (20130101); H04W 72/0453 (20130101); H04W 16/14 (20130101); H04L 5/06 (20130101)
Current International Class: H04W 72/14 (20090101); H04W 72/04 (20090101); H04W 24/08 (20090101); H04L 5/00 (20060101); H04W 72/12 (20090101); H04L 5/06 (20060101); H04W 16/14 (20090101)
2013/0022007 January 2013 Berggren
2013/0028205 January 2013 Damnjanovic
2013/0322378 December 2013 Guan
International Search Report and Written Opinion--PCT/US2016/021817--ISA/EPO--dated Jun. 13, 2016. cited by applicant.
This application claims the benefit of U.S. Provisional Application Ser. No. 62/134,487 entitled "Scheduling enhancements for LTE-U" and filed on Mar. 17, 2015, which is expressly incorporated by reference herein in its entirety.
1. A method for wireless communication by a user equipment (UE), comprising: receiving, from a base station, a downlink (DL) grant for a secondary carrier and an uplink (UL) grant for the secondary carrier, wherein the DL grant is received on the secondary carrier and the UL grant is received on a primary carrier, wherein the DL grant and the UL grant are received using a configuration where DL grants are scheduled by self-scheduling on the secondary carrier and UL grants are scheduled by cross-carrier scheduling on the primary carrier; receiving DL data on the secondary carrier after receiving the DL grant on the secondary carrier; and transmitting UL data on the secondary carrier after receiving the UL grant on the primary carrier, wherein the primary carrier is a different carrier than the secondary carrier.
3. The method of claim 1, further comprising: receiving information about at least one of a set of downlink control information (DCI) formats or DCI format sizes of respective DCI messages to monitor on each subframe on each carrier; and monitoring for at least one of the UL grant or the DL grant based on the information.
5. The method of claim 1, further comprising: receiving information on a number of blind decodes to perform per subframe; and blind decoding based on the number of blind decodes to detect at least one of the DL grant or the UL grant.
6. The method of claim 1, wherein the UL grant received on the primary carrier corresponds to a plurality of unlicensed carriers, and further comprising: selecting a carrier from among the plurality of unlicensed carriers as the secondary carrier to transmit the UL data.
7. The method of claim 6, wherein the selecting the carrier from among the plurality of unlicensed carriers comprises: determining channel availability of channels associated with the plurality of unlicensed carriers, wherein a channel is available when an energy of the channel is lower than an energy threshold; and selecting the carrier associated with the channel for transmission of the UL data based on at least one of the channel availability or a carrier priority.
8. The method of claim 1, further comprising: receiving configuration information from a serving base station adjusting a number of resource blocks to monitor for receiving the UL grant; and monitoring for the UL grant based on the received configuration information adjusting the number of resource blocks to monitor for receiving the UL grant.
9. A method for wireless communication by a base station, comprising: sending a downlink (DL) grant for a secondary carrier and an uplink (UL) grant for the secondary carrier, wherein the DL grant is transmitted on the secondary carrier and the UL grant is transmitted on a primary carrier, wherein the DL grant and the UL grant are transmitted from the base station using a configuration where DL grants are scheduled by self-scheduling on the secondary carrier and UL grants are scheduled by cross-carrier scheduling on the primary carrier; sending DL data on the secondary carrier after sending the DL grant on the secondary carrier; and receiving UL data on the secondary carrier after sending the UL grant on the primary carrier, wherein the primary carrier is a different carrier than the secondary carrier.
11. The method of claim 9, further comprising: sending information about a set of downlink control information (DCI) formats or DCI format sizes to monitor on each subframe on each carrier.
13. The method of claim 9, further comprising: sending configuration information, indicating a maximum number of blind decodes to be performed at a user equipment (UE) per subframe to detect at least one of the DL grant or the UL grant.
15. The method of claim 14, wherein the configuration corresponds to a first configuration used when the TDD UL/DL subframe configuration includes more UL subframes than DL subframes, and the method further comprises: using a second configuration that includes sending DL grants on the secondary carrier and UL grants on the secondary carrier when the TDD UL/DL subframe configuration includes more DL subframes than UL subframes.
21. The method of claim 9, further comprising: sending configuration information adjusting a number of resources the UE is to monitor for the UL grant.
22. The method of claim 21, further comprising: configuring a number of candidates or aggregation levels to monitor in a physical downlink control channel (PDCCH); configuring at least one of a number of sets of enhanced PDCCHs (EPDCCHs), a number of resource blocks (RBs) for each set of EPDCCHs, a type of EPDCCH, or a number of candidates or aggregation levels for EPDCCH monitoring.
24. A user equipment (UE) for wireless communication, comprising: means for receiving, from a base station, a downlink (DL) grant for a secondary carrier and an uplink (UL) grant for the secondary carrier, wherein the DL grant is received on the secondary carrier and the UL grant is received on a primary carrier, wherein the DL grant and the UL grant are received using a configuration where DL grants are scheduled by self-scheduling on the secondary carrier and UL grants are scheduled by cross-carrier scheduling on the primary carrier; means for receiving DL data on the secondary carrier after receiving the DL grant on the secondary carrier; and means for transmitting UL data on the secondary carrier after receiving the UL grant on the primary carrier, wherein the primary carrier is a different carrier than the secondary carrier.
26. The UE of claim 24, further comprising: means for receiving information about at least one of a set of downlink control information (DCI) formats or DCI format sizes of respective DCI messages to monitor on each subframe on each carrier; and means for monitoring for at least one of the UL grant or the DL grant based on the information.
28. The UE of claim 24, further comprising: means for receiving information on a number of blind decodes to perform per subframe; and means for blind decoding based on the number of blind decodes to detect at least one of the DL grant or the UL grant.
29. The UE of claim 24, wherein the UL grant received on the primary carrier corresponds to a plurality of unlicensed carriers, and further comprising: means for selecting a carrier from among the plurality of unlicensed carriers as the secondary carrier to transmit the UL data.
30. The UE of claim 29, wherein the means for selecting the carrier from among the plurality of unlicensed carriers is configured to: determine channel availability of channels associated with the plurality of unlicensed carriers, wherein a channel is available when an energy of the channel is lower than an energy threshold; and select the carrier associated with the channel for transmission of the UL data based on at least one of the channel availability or a carrier priority.
31. The UE of claim 24, further comprising: means for receiving configuration information from a serving base station adjusting a number of resource blocks to monitor for receiving the UL grant; and means for monitoring for the UL grant based on the received configuration information adjusting the number of resource blocks to monitor for receiving the UL grant.
32. A base station for wireless communication, comprising: means for sending a downlink (DL) grant for a secondary carrier and an uplink (UL) grant for the secondary carrier, wherein the DL grant is transmitted on the secondary carrier and the UL grant is transmitted on a primary carrier, wherein the DL grant and the UL grant are transmitted from the base station using a configuration where DL grants are scheduled by self-scheduling on the secondary carrier and UL grants are scheduled by cross-carrier scheduling on the primary carrier; means for sending DL data on the secondary carrier after sending the DL grant on the secondary carrier; and means for receiving UL data on the secondary carrier after sending the UL grant on the primary carrier, wherein the primary carrier is a different carrier than the secondary carrier.
34. The base station of claim 32, further comprising: means for sending information about a set of downlink control information (DCI) formats or DCI format sizes to monitor on each subframe on each carrier.
36. The base station of claim 32, further comprising: means for sending configuration information, indicating a maximum number of blind decodes to be performed at a user equipment (UE) per subframe to detect at least one of the DL grant or the UL grant.
37. The base station of claim 32, further comprising: means for selecting the configuration based on a time division duplex (TDD) UL/DL subframe configuration.
38. The base station of claim 37, wherein the configuration corresponds to a first configuration used when the TDD UL/DL subframe configuration includes more UL subframes than DL subframes, and the base station further comprises means for using a second configuration that includes sending DL grants on the secondary carrier and UL grants on the secondary carrier when the TDD UL/DL subframe configuration includes more DL subframes than UL subframes.
42. The base station of claim 32, wherein the secondary carrier to receive the UL data is a carrier selected among a plurality of unlicensed carriers, and wherein the UL grant sent on the primary carrier is specified for the plurality of unlicensed carriers.
44. The base station of claim 32, further comprising: means for sending configuration information adjusting a number of resources the UE is to monitor for the UL grant.
45. The base station of claim 44, further comprising: means for configuring a number of candidates or aggregation levels to monitor in a physical downlink control channel (PDCCH); means for configuring at least one of a number of sets of enhanced PDCCHs (EPDCCHs), a number of resource blocks (RBs) for each set of EPDCCHs, a type of EPDCCH, or a number of candidates or aggregation levels for EPDCCH monitoring.
47. A user equipment (UE) for wireless communication, comprising: a memory; and at least one processor coupled to the memory and configured to: receive, from a base station, a downlink (DL) grant for a secondary carrier and an uplink (UL) grant for the secondary carrier, wherein the DL grant is received on the secondary carrier and the UL grant is received on a primary carrier, wherein the DL grant and the UL grant are received using a configuration where DL grants are scheduled by self-scheduling on the secondary carrier and UL grants are scheduled by cross-carrier scheduling on the primary carrier; receive DL data on the secondary carrier after receiving the DL grant on the secondary carrier; and transmit UL data on the secondary carrier after receiving the UL grant on the primary carrier, wherein the primary carrier is a different carrier than the secondary carrier.
49. The UE of claim 47, wherein the at least one processor is further configured to: receive information about at least one of a set of downlink control information (DCI) formats or DCI format sizes of respective DCI messages to monitor on each subframe on each carrier; and monitor for at least one of the UL grant or the DL grant based on the information.
51. The UE of claim 47, wherein the at least one processor is further configured to: receive information on a number of blind decodes to perform per subframe; and blind decode based on the number of blind decodes to detect at least one of the DL grant or the UL grant.
52. The UE of claim 47, wherein the UL grant received on the primary carrier corresponds to a plurality of unlicensed carriers, and the at least one processor is further configured to: select a carrier from among the plurality of unlicensed carriers as the secondary carrier to transmit the UL data.
53. The UE of claim 52, wherein the at least one processor configured to select the carrier from among the plurality of unlicensed carriers is configured to: determine channel availability of channels associated with the plurality of unlicensed carriers, wherein a channel is available when an energy of the channel is lower than an energy threshold; and select the carrier associated with the channel for transmission of the UL data based on at least one of the channel availability or a carrier priority.
54. The UE of claim 47, wherein the at least one processor is further configured to: receive configuration information from a serving base station adjusting a number of resource blocks to monitor for receiving the UL grant; and monitor for the UL grant based on the received configuration information adjusting the number of resource blocks to monitor for receiving the UL grant.
55. A base station for wireless communication, comprising: a memory; and at least one processor coupled to the memory and configured to: send a downlink (DL) grant for a secondary carrier and an uplink (UL) grant for the secondary carrier, wherein the DL grant is transmitted on the secondary carrier and the UL grant is transmitted on a primary carrier, wherein the DL grant and the UL grant are transmitted from the base station using a configuration where DL grants are scheduled by self-scheduling on the secondary carrier and UL grants are scheduled by cross-carrier scheduling on the primary carrier; send DL data on the secondary carrier after sending the DL grant on the secondary carrier; and receive UL data on the secondary carrier after sending the UL grant on the primary carrier, wherein the primary carrier is a different carrier than the secondary carrier.
57. The base station of claim 55, wherein the at least one processor is further configured to: send information about a set of downlink control information (DCI) formats or DCI format sizes to monitor on each subframe on each carrier.
59. The base station of claim 55, wherein the at least one processor is further configured to: send configuration information, indicating a maximum number of blind decodes to be performed at a user equipment (UE) per subframe to detect at least one of the DL grant or the UL grant.
60. The base station of claim 55, wherein the at least one processor is further configured to: select the configuration based on a time division duplex (TDD) UL/DL subframe configuration.
61. The base station of claim 60, wherein the configuration corresponds to a first configuration used when the TDD UL/DL subframe configuration includes more UL subframes than DL subframes, and the at least one processor is further configured to: use a second configuration that includes sending DL grants on the secondary carrier and UL grants on the secondary carrier when the TDD UL/DL subframe configuration includes more DL subframes than UL subframes.
65. The base station of claim 55, wherein the secondary carrier to receive the UL data is a carrier selected among a plurality of unlicensed carriers, and wherein the UL grant sent on the primary carrier is specified for the plurality of unlicensed carriers.
67. The base station of claim 55, wherein the at least one processor is further configured to: send configuration information adjusting a number of resources the UE is to monitor for the UL grant.
68. The base station of claim 67, wherein the at least one processor is further configured to: configure a number of candidates or aggregation levels to monitor in a physical downlink control channel (PDCCH); configure at least one of a number of sets of enhanced PDCCHs (EPDCCHs), a number of resource blocks (RBs) for each set of EPDCCHs, a type of EPDCCH, or a number of candidates or aggregation levels for EPDCCH monitoring.
70. A computer-readable medium storing computer executable code for wireless communication by a user equipment (UE), comprising code to: receive, from a base station, a downlink (DL) grant for a secondary carrier and an uplink (UL) grant for the secondary carrier, wherein the DL grant is received on the secondary carrier and the UL grant is received on a primary carrier, wherein the DL grant and the UL grant are received using a configuration where DL grants are scheduled by self-scheduling on the secondary carrier and UL grants are scheduled by cross-carrier scheduling on the primary carrier; receive DL data on the secondary carrier after receiving the DL grant on the secondary carrier; and transmit UL data on the secondary carrier after receiving the UL grant on the primary carrier, wherein the primary carrier is a different carrier than the secondary carrier.
72. The computer-readable medium of claim 70, further comprising code to: receive information about at least one of a set of downlink control information (DCI) formats or DCI format sizes of respective DCI messages to monitor on each subframe on each carrier; and monitor for at least one of the UL grant or the DL grant based on the information.
74. The computer-readable medium of claim 70, further comprising code to: receive information on a number of blind decodes to perform per subframe; and blind decode based on the number of blind decodes to detect at least one of the DL grant or the UL grant.
75. The computer-readable medium of claim 70, wherein the UL grant received on the primary carrier corresponds to a plurality of unlicensed carriers, further comprising code to: select a carrier from among the plurality of unlicensed carriers as the secondary carrier to transmit the UL data.
76. The computer-readable medium of claim 75, wherein the code to select the carrier from among the plurality of unlicensed carriers comprises code to: determine channel availability of channels associated with the plurality of unlicensed carriers, wherein a channel is available when an energy of the channel is lower than an energy threshold; and select the carrier associated with the channel for transmission of the UL data based on at least one of the channel availability or a carrier priority.
77. The computer-readable medium of claim 70, further comprising code to: receive configuration information from a serving base station adjusting a number of resource blocks to monitor for receiving the UL grant; and monitor for the UL grant based on the received configuration information adjusting the number of resource blocks to monitor for receiving the UL grant.
78. A computer-readable medium storing computer executable code for wireless communication by a base station, comprising code to: send a downlink (DL) grant for a secondary carrier and an uplink (UL) grant for the secondary carrier, wherein the DL grant is transmitted on the secondary carrier and the UL grant is transmitted on a primary carrier, wherein the DL grant and the UL grant are transmitted from the base station using a configuration where DL grants are scheduled by self-scheduling on the secondary carrier and UL grants are scheduled by cross-carrier scheduling on the primary carrier; send DL data on the secondary carrier after sending the DL grant on the secondary carrier; and receive UL data on the secondary carrier after sending the UL grant on the primary carrier, wherein the primary carrier is a different carrier than the secondary carrier.
80. The computer-readable medium of claim 78, further comprising code to: send information about a set of downlink control information (DCI) formats or DCI format sizes to monitor on each subframe on each carrier.
82. The computer-readable medium of claim 78, further comprising code to: send configuration information, indicating a maximum number of blind decodes to be performed at a user equipment (UE) per subframe to detect at least one of the DL grant or the UL grant.
84. The computer-readable medium of claim 83, wherein the configuration corresponds to a first configuration used when the TDD UL/DL subframe configuration includes more UL subframes than DL subframes, and the computer-readable medium further comprises code to use a second configuration that includes sending DL grants on the secondary carrier and UL grants on the secondary carrier when the TDD UL/DL subframe configuration includes more DL subframes than UL subframes.
88. The computer-readable medium of claim 78, wherein the secondary carrier to receive the UL data is a carrier selected among a plurality of unlicensed carriers, and wherein the UL grant sent on the primary carrier is specified for the plurality of unlicensed carriers.
90. The computer-readable medium of claim 78, further comprising code to: send configuration information adjusting a number of resources the UE is to monitor for the UL grant.
91. The computer-readable medium of claim 90, further comprising code to: configure a number of candidates or aggregation levels to monitor in a physical downlink control channel (PDCCH); configure at least one of a number of sets of enhanced PDCCHs (EPDCCHs), a number of resource blocks (RBs) for each set of EPDCCHs, a type of EPDCCH, or a number of candidates or aggregation levels for EPDCCH monitoring.
As illustrated in FIG. 2A, some of the REs carry DL reference (pilot) signals (DL-RS) for channel estimation at the UE. The DL-RS may include cell-specific reference signals (CRS) (also sometimes called common RS), UE-specific reference signals (UE-RS), and channel state information reference signals (CSI-RS). FIG. 2A illustrates CRS for antenna ports 0, 1, 2, and 3 (indicated as R.sub.0, R.sub.1, R.sub.2, and R.sub.3, respectively), UE-RS for antenna port 5 (indicated as R.sub.5), and CSI-RS for antenna port 15 (indicated as R). FIG. 2B illustrates an example of various channels within a DL subframe of a frame. The physical control format indicator channel (PCFICH) is within symbol 0 of slot 0, and carries a control format indicator (CFI) that indicates whether the physical downlink control channel (PDCCH) occupies 1, 2, or 3 symbols (FIG. 2B illustrates a PDCCH that occupies 3 symbols). The PDCCH carries downlink control information (DCI) within one or more control channel elements (CCEs), each CCE including nine RE groups (REGs), each REG including four consecutive REs in an OFDM symbol. A UE may be configured with a UE-specific enhanced PDCCH (ePDCCH) that also carries DCI. The ePDCCH may have 2, 4, or 8 RB pairs (FIG. 2B shows two RB pairs, each subset including one RB pair). The physical hybrid automatic repeat request (ARQ) (HARQ) indicator channel (PHICH) is also within symbol 0 of slot 0 and carries the HARQ indicator (HI) that indicates HARQ acknowledgement (ACK)/negative ACK (NACK) feedback based on the physical uplink shared channel (PUSCH). The primary synchronization channel (PSCH) is within symbol 6 of slot 0 within subframes 0 and 5 of a frame, and carries a primary synchronization signal (PSS) that is used by a UE to determine subframe timing and a physical layer identity. The secondary synchronization channel (SSCH) is within symbol 5 of slot 0 within subframes 0 and 5 of a frame, and carries a secondary synchronization signal (SSS) that is used by a UE to determine a physical layer cell identity group number. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine a physical cell identifier (PCI). Based on the PCI, the UE can determine the locations of the aforementioned DL-RS. The physical broadcast channel (PBCH) is within symbols 0, 1, 2 3, of slot 1 of subframe 0 of a frame, and carries a master information block (MIB). The MIB provides a number of RBs in the DL system bandwidth, a PHICH configuration, and a system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH such as system information blocks (SIBs), and paging messages.
FIG. 4 is an illustration of an example 400 of a wireless communication 410 over an unlicensed radio frequency spectrum band, in accordance with various aspects of the present disclosure. In some examples, a listen before talk (LBT) radio frame 415 may have a duration of ten milliseconds and include a number of downlink (D) subframes 420, a number of uplink (U) subframes 425, and two types of special subframes, an S subframe 430 and an S' subframe 435. The S subframe 430 may provide a transition between downlink subframes 420 and uplink subframes 425, while the S' subframe 435 may provide a transition between uplink subframes 425 and downlink subframes 420 and, in some examples, a transition between LBT radio frames.
During the S' subframe 435, a downlink clear channel assessment (CCA) procedure 445 may be performed by one or more base stations, such as one or more of the base stations 102 described with reference to FIG. 1, to reserve, for a period of time, a channel of the contention-based shared radio frequency spectrum band over which the wireless communication 410 occurs. Following a successful downlink CCA procedure 445 by a base station, the base station may transmit a preamble, such as a channel usage beacon signal (CUBS) (e.g., a downlink CUBS (D-CUBS 450)) to provide an indication to other base stations or apparatuses (e.g., UEs, WiFi access points, etc.) that the base station has reserved the channel. In some examples, a D-CUBS 450 may be transmitted using a plurality of interleaved resource blocks. Transmitting a D-CUBS 450 in this manner may enable the D-CUBS 450 to occupy at least a certain percentage of the available frequency bandwidth of the contention-based shared radio frequency spectrum band and satisfy one or more regulatory requirements (e.g., a requirement that transmissions over an unlicensed radio frequency spectrum band occupy at least 80% of the available frequency bandwidth). The D-CUBS 450 may in some examples take a form similar to that of an LTE/LTE-A cell-specific reference signal (CRS) or a channel state information reference signal (CSI-RS). When the downlink CCA procedure 445 fails, the D-CUBS 450 may not be transmitted.
The S' subframe 435 may include a plurality of OFDM symbol periods (e.g., 14 OFDM symbol periods). A first portion of the S' subframe 435 may be used by a number of UEs as a shortened uplink (U) period 440. A second portion of the S' subframe 435 may be used for the downlink CCA procedure 445. A third portion of the S' subframe 435 may be used by one or more base stations that successfully contend for access to the channel of the contention-based shared radio frequency spectrum band to transmit the D-CUBS 450.
As discussed supra, CCs may be aggregated together via carrier aggregation and may be configured with either an FDD configuration or with a TDD configuration. For a cross-carrier scheduling mode on an SCC using an FDD PCC, if a DL grant is received in subframe n of the PCC, the DL data is received in subframe n of the SCC based on the DL grant. In addition, for a cross-carrier scheduling mode on an SCC using a FDD PCC, if a UL grant is received in subframe n-4 of the PCC, the UL data is received in subframe n of the SCC based on the UL grant. For a cross-carrier scheduling mode on an SCC using TDD PCC, a DL grant for receiving DL data on subframe n of the SCC may be scheduled on the PCC when a DL subframe is present in the PCC. For a cross-carrier scheduling mode on an SCC using TDD PCC, the UL grant for transmitting UL data on subframe n of the SCC may be received in subframe n-4, n-5, n-6, etc., depending on the TDD configuration of the PCC.
TABLE-US-00001 TABLE 1 LTE TDD DL/UL Subframe Configurations Downlink- Uplink- to-uplink downlink Switch- config- point Subframe number uration periodicity 0 1 2 3 4 5 6 7 8 9 0 5 ms D S U U U D S U U U 1 5 ms D S U U D D S U U D 2 5 ms D S U D D D S U D D 3 10 ms D S U U U D D D D D 4 10 ms D S U U D D D D D D 5 10 ms D S U D D D D D D D 6 5 ms D S U U U D S U U D
FIG. 8 is a flow chart 800 of a method of wireless communication. The method may be performed by a UE (e.g., the UE 104, the UE 752, the apparatus 1102/1102'). At block 801, one or more additional methods discussed infra may be performed. Blocks with dotted lines may include optional features or steps.
FIG. 9A is a flow chart 900 of a method of wireless communication expanding from the flow chart 800 of FIG. 8, according to an aspect of the disclosure. The method may be performed by a UE (e.g., the UE 104, the UE 752, the apparatus 1102/1102'). The flow chart 900 expands from block 801 of FIG. 8. For example, the method in the flow chart 900 may be performed to monitor for a DL grant and/or a UL grant, such that the UE may receive the DL grant and the UL grant at block 804 of FIG. 8. In an aspect, the UE may continue at block 802 or block 804 of FIG. 8 after performing the features of the flow chart 900.
FIG. 9B is a flow chart 950 of a method of wireless communication expanding from the flow chart 800 of FIG. 8, according to an aspect of the disclosure. The method may be performed by a UE (e.g., the UE 104, the UE 752, the apparatus 1102/1102'). The flow chart 950 expands from block 801 of FIG. 8. For example, the method in the flow chart 950 may be performed to detect a DL grant and/or a UL grant, such that the UE may receive the DL grant and the UL grant at block 804 of FIG. 8. In an aspect, the UE may continue at block 802 or block 804 of FIG. 8 after performing the operations of the flow chart 950.
FIG. 10A is a flow chart 1000 of a method of wireless communication expanding from the flow chart 800 of FIG. 8, according to an aspect of the disclosure. The method may be performed by a UE (e.g., the UE 104, the UE 752, the apparatus 1102/1102'). The flow chart 1000 expands from block 801 of FIG. 8. For example, the method in the flow chart 1000 may be performed to select a carrier to transmit UL data, such that the UE may transmit the UL data at block 808 of FIG. 8. In an aspect, the UE may continue at block 802 or block 804 of FIG. 8 after performing the features of the flow chart 1000.
FIG. 10B is a flow chart 1050 of a method of wireless communication expanding from the flow chart 800 of FIG. 8, according to an aspect of the disclosure. The method may be performed by a UE (e.g., the UE 104, the UE 752, the apparatus 1102/1102'). The flow chart 1050 expands from block 801 of FIG. 8. For example, the method in the flow chart 1050 may be performed to monitor for a UL grant, such that the UE may receive the UL grant at block 804 of FIG. 8. In an aspect, the UE may continue at block 802 or block 804 of FIG. 8 after performing the features of the flow chart 1050.
FIG. 12 is a diagram 1200 illustrating an example of a hardware implementation for an apparatus 1102' employing a processing system 1214. The processing system 1214 may be implemented with a bus architecture, represented generally by the bus 1224. The bus 1224 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 1214 and the overall design constraints. The bus 1224 links together various circuits including one or more processors and/or hardware components, represented by the processor 1204, the components 1104, 1106, 1108, 1110, 1112, 1114, 1116, and the computer-readable medium/memory 1206. The bus 1224 may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further.
In one configuration, the apparatus 1102/1102' for wireless communication includes means for receiving a DL grant for a secondary carrier and a UL grant for the secondary carrier, where the DL grant is received on the secondary carrier and the UL grant is received on a primary carrier, means for receiving DL data on the secondary carrier after receiving the DL grant on the secondary carrier, and means for transmitting UL data on the secondary carrier after receiving the UL grant on the primary carrier. The apparatus 1102/1102' further includes means for receiving information about at least one of a set of DCI formats or DCI format sizes of respective DCI messages to monitor on each subframe on each carrier, and means for monitoring for at least one of the UL grant or the DL grant based on the information. The apparatus 1102/1102' further includes means for receiving information on a number of blind decodes to perform per subframe, and means for blind decoding based on the number of blind decodes to detect at least one of the DL grant or the UL grant. The apparatus 1102/1102' further includes means for receiving, on the primary carrier, a DL grant indicator, where the DL grant indicator indicates whether the UE should monitor at least one of the primary carrier or the secondary carrier for the DL grant. The apparatus 1102/1102' further includes means for selecting a carrier from among the plurality of unlicensed carriers as the secondary carrier to transmit the UL data, where the UL grant received on the primary carrier corresponds to a plurality of unlicensed carriers. The apparatus 1102/1102' further includes means for receiving configuration information from a serving base station adjusting a number of resource blocks to monitor for receiving the UL grant, and means for monitoring for the UL grant based on the received configuration information adjusting the number of resource blocks to monitor for receiving the UL grant.
The aforementioned means may be one or more of the aforementioned components of the apparatus 1102 and/or the processing system 1214 of the apparatus 1102' configured to perform the functions recited by the aforementioned means. As described supra, the processing system 1214 may include the TX Processor 368, the RX Processor 356, and the controller/processor 359. As such, in one configuration, the aforementioned means may be the TX Processor 368, the RX Processor 356, and the controller/processor 359 configured to perform the functions recited by the aforementioned means.
FIG. 13 is a flow chart 1300 of a method of wireless communication. The method may be performed by a base station (e.g., the base station 102, the eNB 754 104, the apparatus 1602/1602'). At block 1301, one or more additional methods discussed infra may be performed. Blocks with dotted lines may include optional features or steps.
FIG. 14A is a flow chart 1400 of a method of wireless communication expanding from the flow chart 1300 of FIG. 13, according to an aspect of the disclosure. The method may be performed by a base station (e.g., the base station 102, the eNB 754, the apparatus 1602/1602'). The flow chart 1400 expands from block 1301 of FIG. 13. For example, the method in the flow chart 1400 may be performed to provide information used to monitor for a DL grant and/or a UL grant, such that the UE may receive the DL grant and the UL grant when the DL grant and the UL grant is sent at block 1304 of FIG. 13. In an aspect, the base station may continue at block 1302 or block 1304 of FIG. 13 after performing the features of the flow chart 1400.
FIG. 14B is a flow chart 1450 of a method of wireless communication expanding from the flow chart 1300 of FIG. 13, according to an aspect of the disclosure. The method may be performed by a base station (e.g., the base station 102, the eNB 754, the apparatus 1602/1602'). The flow chart 1450 expands from block 1301 of FIG. 13. For example, the method in the flow chart 1450 may be performed to provide configuration for the UE to perform blind decodes to detect a DL grant and/or a UL grant, such that the UE may receive the DL grant and the UL grant when the DL grant and the UL grant is sent at block 1304 of FIG. 13. In an aspect, the base station may continue at block 1302 or block 1304 of FIG. 13 after performing the features of the flow chart 1450.
FIG. 15A is a flow chart 1500 of a method of wireless communication expanding from the flow chart 1300 of FIG. 13, according to an aspect of the disclosure. The method may be performed by a base station (e.g., the base station 102, the eNB 754, the apparatus 1602/1602'). The flow chart 1500 expands from block 1301 of FIG. 13. For example, the method in the flow chart 1500 may be performed to configure transmission of a UL grant and a DL grant at block 1304 of FIG. 13. In an aspect, the base station may continue at block 1302 or block 1304 of FIG. 13 after performing the features of the flow chart 1500.
FIG. 15B is a flow chart 1550 of a method of wireless communication expanding from the flow chart 1300 of FIG. 13, according to an aspect of the disclosure. The method may be performed by a base station (e.g., the base station 102, the eNB 754, the apparatus 1602/1602'). The flow chart 1550 expands from block 1301 of FIG. 13. For example, the method in the flow chart 1550 may be performed to provide the UE with information used to monitor for a UL grant, such that the UE may receive the UL grant when the UL grant is sent at block 1304 of FIG. 13. In an aspect, the base station may continue at block 1302 or block 1304 of FIG. 13 after performing the features of the flow chart 1550.
FIG. 17 is a diagram 1700 illustrating an example of a hardware implementation for an apparatus 1602' employing a processing system 1714. The processing system 1714 may be implemented with a bus architecture, represented generally by the bus 1724. The bus 1724 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 1714 and the overall design constraints. The bus 1724 links together various circuits including one or more processors and/or hardware components, represented by the processor 1704, the components 1604, 1606, 1608, 1610, 1612, 1614, 1616, and the computer-readable medium/memory 1706. The bus 1724 may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further.
In one configuration, the apparatus 1602/1602' for wireless communication includes means for sending a DL grant for a secondary carrier and a UL grant for the secondary carrier, where the DL grant is transmitted on the secondary carrier and the UL grant is transmitted on a primary carrier, means for sending DL data on the secondary carrier after sending the DL grant on the secondary carrier, and means for receiving UL data on the secondary carrier after sending the UL grant on the primary carrier. The apparatus 1602/1602' further includes means for sending information about a set of DCI formats or DCI format sizes to monitor on each subframe on each carrier. The apparatus 1602/1602' further includes means for sending configuration information, indicating a maximum number of blind decodes to be performed at the UE per subframe to detect at least one of the DL grant or the UL grant. The apparatus 1602/1602' further includes means for sending, on the primary carrier, a DL grant indicator, where the DL grant indicator indicates whether the UE should monitor at least one of the primary carrier or the secondary carrier for the DL grant. The apparatus 1602/1602' further includes means for selecting an UL/DL grant configuration based on a TDD subframe configuration. The apparatus 1602/1602' further includes means for sending configuration information adjusting a number of resources the UE is to monitor for the UL grant. The apparatus 1602/1602' further includes means for configuring a number of candidates or aggregation levels to monitor in a PDCCH, and means for configuring at least one of a number of sets of EPDCCHs, a number of RBs for each set of EPDCCHs, a type of EPDCCH, or a number of candidates or aggregation levels for EPDCCH monitoring.
The aforementioned means may be one or more of the aforementioned components of the apparatus 1602 and/or the processing system 1714 of the apparatus 1602' configured to perform the functions recited by the aforementioned means. As described supra, the processing system 1714 may include the TX Processor 316, the RX Processor 370, and the controller/processor 375. As such, in one configuration, the aforementioned means may be the TX Processor 316, the RX Processor 370, and the controller/processor 375 configured to perform the functions recited by the aforementioned means.
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