System information monitoring under beam hopping and synchronization signal block periodicity extension
By extending SIB periodicity and adjusting monitoring occasions based on beam coverage patterns, the solution addresses discontinuous coverage in NTNs, ensuring reliable system information reception and reducing unnecessary monitoring.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-10-01
- Publication Date
- 2026-04-09
AI Technical Summary
In non-terrestrial networks (NTNs) utilizing beam hopping, UEs experience discontinuous coverage due to beam hopping, leading to unnecessary system information monitoring when out of beam coverage, which is inefficient and can result in missed system information updates.
The periodicity of system information blocks (SIBs) is extended to align with the revisit time of beam coverage patterns, and the monitoring occasions are adjusted using scaling factors and offset values to ensure SIBs are received during beam coverage periods.
This approach ensures that UEs can reliably monitor and receive all necessary system information during beam coverage, reducing unnecessary monitoring and improving network performance by aligning SIB transmission with beam coverage patterns.
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Figure CN2024123136_09042026_PF_FP_ABST
Abstract
Description
SYSTEM INFORMATION MONITORING UNDER BEAM HOPPING AND SYNCHRONIZATION SIGNAL BLOCK PERIODICITY EXTENSIONFIELD
[0001] This disclosure relates to wireless communication networks including techniques for supporting non-terrestrial networks (NTNs) .BACKGROUND
[0002] As the number of mobile devices within wireless networks, and the demand for mobile data traffic continue to increase, changes are made to system requirements and architectures to better address current and anticipated demands. For example, some wireless communication networks may be developed to implement fifth generation (5G) or new radio (NR) technology, sixth generation (6G) technology, and so on. An aspect of such technology includes addressing how communication techniques may be extended as radio network components are implemented in non-terrestrial platforms.BRIEF DESCRIPTION OF THE DRAWINGS
[0003] The present disclosure will be readily understood and enabled by the detailed description and accompanying figures of the drawings. Like reference numerals may designate like features and structural elements. Figures and corresponding descriptions are provided as non-limiting examples of aspects, implementations, etc., of the present disclosure, and references to "an" or “one” aspect, implementation, etc., may not necessarily refer to the same aspect, implementation, etc., and may mean at least one, one or more, etc.
[0004] FIG. 1 is a diagram of an example non-terrestrial network (NTN) that performs beam hopping to cover an NTN cell, in accordance with various aspects disclosed.
[0005] FIG. 2 is a system frame diagram illustrating the scheduling of system information block type 1 (SIB1) , in accordance with various aspects disclosed.
[0006] FIG. 3 illustrates an interaction between beam hopping and SIB1 scheduling, in accordance with various aspects disclosed.
[0007] FIG. 4 is a system frame diagram illustrating the scheduling of system information messages, in accordance with various aspects disclosed.
[0008] FIG. 5 illustrates an interaction between beam hopping and system information messages scheduling, in accordance with various aspects disclosed.
[0009] FIG. 6 is a system frame diagram illustrating the scheduling of system information messages, in accordance with various aspects disclosed.
[0010] FIG. 7 is a system frame diagram illustrating the scheduling of system information messages, in accordance with various aspects disclosed.
[0011] FIG. 8 is a system frame diagram illustrating the scheduling of system information messages, in accordance with various aspects disclosed.
[0012] FIG. 9 is a flow diagram an example method for monitoring for system information block 1 (SIB1) , in accordance with various aspects disclosed.
[0013] FIG. 10 is a flow diagram an example method for monitoring for system information blocks (SIB) , in accordance with various aspects disclosed.
[0014] FIG. 11 is a flow diagram an example method for transmitting system information, in accordance with various aspects disclosed.
[0015] FIG. 12 is a functional block diagram of a wireless communication network, in accordance with various aspects described.
[0016] FIG. 13 illustrates a simplified block diagram of a user equipment device, in accordance with various aspects described.DETAILED DESCRIPTION
[0017] The following detailed description refers to the accompanying drawings. Like reference numbers in different drawings may identify the same or similar features, elements, operations, etc. Additionally, the present disclosure is not limited to the following description as other implementations may be utilized, and structural or logical changes made, without departing from the scope of the present disclosure.
[0018] Wireless communication networks may include user equipment (UEs) , base stations, and / or other types of wireless devices capable of communicating with one another. 5G Release 17 established standards for non-terrestrial network (NTN) based communication. FIG. 1 illustrates a wireless network 100 in which multiple UEs 110-1 to 110-9 located in an NTN cell are served by a satellite 160. The area covered by an NTN cell may be on the order of millions of square kilometers and likely will encompass many more UEs than typical land networks. To cover the increased coverage area, the satellite 160 may perform beam hopping, in which the NTN cell is divided into multiple cells that are served by different beams in a time division multiplexed manner. For example, in the network 100 during a first time interval the satellite 160 may steer its beam to a first position, shown with a dot fill and labeled Beam Hop 1. During a second time interval the satellite 160 may steer its beam to a second position, labeled Beam Hop 2, and so on through two additional time intervals for Beam Hop3 and Beam Hop 4, respectively. In a fifth time interval, the satellite 160 may return the beam to the first position.
[0019] In this manner, UEs 110-1 and 110-2 may expect to communicate with the satellite 160 during the first time interval, during which time the satellite is transmitting and receiving signals using a beam directed to the first position (Beam Hop 1) . The UEs 110-1 and 110-2 do not expect to communicate with the network during the second, third, and fourth time intervals. Likewise, the other UEs 110-3 to 110-9 do not expect to communicate with the satellite during the first time interval. While beam hopping may improve network performance in terms of improved SNR for communication signals, it can be seen that beam hopping provides discontinuous coverage for UEs in an NTN cell. While many examples herein will be in the context of NTN, it is to be understood that the disclosed solutions may be equally applicable to terrestrial networks.
[0020] System Information Monitoring Overview
[0021] System information is broadcast by a cell in system information blocks (SIBs) . A SIB spans one or more symbols in the time domain. SIB1 is associated with synchronization signal blocks (SSBs) . SIB1 provides essential information to UEs seeking to camp on a cell. For example, SIB1 includes information regarding random access parameters that allow the UE to access the cell. Additional system information may be broadcast by a cell using other types system information blocks. Several different types of SIBs are preconfigured by the network. For example SIB2 provides information about access barring, SIB3 provides information regarding intra-frequency cell reselection, SIB19 provides information about NTN, and so on. SIB1 provides information regarding the availability and scheduling of other SIBs in the cell as will disclosed in more detail below.
[0022] According to current 3GPP standards, a UE may determine which physical downlink control channel (PDCCH) monitoring occasions (e.g., time resources such as symbols) to monitor for SIB1 as follows. Referring to FIG. 2, for operation without shared spectrum channel access and for the SSB block and CORESET multiplexing pattern 1, a UE monitors PDCCH in the Type0-PDCCH common search space set over two slots. For SSB with index i the UE determines an index of a first slot n0 of the two slots as follows. that is in a frame with system frame number (SFN) SFNC satisfying SFNCmod2=0 if or in a frame with SFNC satisfying SFNCmod2=1 if where μ= {0, 1, 2, 3, 5, 6} based on the subcarrier spacing for PDCCH receptions in the CORESET. Values of O and M are configured based on Table 13-11 of 3GPP TS 38.213.
[0023] Table 13-11: Parameters for PDCCH monitoring occasions for Type0-PDCCH CSS set-SS / PBCH block and CORESET multiplexing pattern 1 and FR1
[0024] For μ ∈ {0, 1, 2, 3} and for SSB block index i, the two slots including the associated Type0-PDCCH monitoring occasions are the slots n0 and n0 + 1. The index of the first symbol of the CORESET in slots n0 and n0 + 1 are provided in Table 13-12 of 3GPP TS 38.213 (not reproduced here for brevity) . In NTN, the subcarrier spacing may be 15kHz or 30 kHz or μ=0 or 1, in FIG. 2, two consecutive slots n0 and n0 + 1 are monitored.
[0025] For μ = 5 and for SSB block index i, the two slots including the associated Type0-PDCCH monitoring occasions are the slots n0 and n0 + 4. The index of the first symbol of the CORESET in slots n0 and n0 + 4 are provided in Table 13-12A of 3GPP TS 38.213 (not reproduced here for brevity) with X= 1.25.
[0026] For μ = 6 and for SSB block index i, the two slots including the associated Type0-PDCCH monitoring occasions are the slots n0 and n0 + 8. The index of the first symbol of the CORESET in slots n0 and n0 + 8 are provided in Table 13-12A of 3GPP TS 38.213 (not reproduced here for brevity) with X= 0.625.
[0027] As illustrated in FIG. 2, according to this process the UE determines particular symbols to monitor in two particular slots of every other radio frame and whether to monitor the two slots in even radio frames or odd radio frames. Other methods may be used to determine which symbols to monitor for system information, according to some aspects.
[0028] FIG. 3 illustrates a beam coverage pattern that repeats every fourth time interval or every 8 radio frames. For the purposes of this disclosure, the UE determining the monitoring occasions for SIB1 is in the coverage area of the first beam hop (e.g., occurring in T1 and T5) . It is assumed that each radio frame is 10 ms long and includes 10 slots. The dwell time of each hop is two radio frames or 20 slots (20 ms) . A revisit time (R) of the beam pattern may be defined as the number of radio frames until the next occurrence of a particular beam position or a period of the beam coverage pattern. In FIG. 3, R=8 or 160 slots (160 ms) . Recall that the process outlined above with reference to FIG. 2 will cause the UE to monitor for SIB1 in certain symbols in two slots of every other radio frame. In FIG. 3 it is assumed that even SFN slots are monitored. It can be seen that this SIB1 monitoring pattern will cause the UE to monitor for SIB1 during even radio frames in times T1, T2, T3, T4, and T5 whilst the UE will not be in coverage of the beam during T2, T3, and T4. This means that the UE will perform unnecessary SIB1 monitoring during these time periods.
[0029] The UE receives information in SIB1 about other SIBs that are broadcast by the cell and how to monitor for them. According to current 3GPP standards, SIB1 includes an IE SI-schedulingInfo that provides a window length w that is common to all SIB broadcast by the cell. The window length w is a number of slots to be monitored for SIB. SI-schedulingInfo also provides a list of SIB types broadcast by the cell (identified by an index number n, with n=0 indicating SIB1, n=1 indicating SIB2, and so on) and a periodicity T for each SIB type. To determine a slot index for starting SIB monitoring, the UE determines an integer value x =(n-1) ·w. The system information (SI) window is determined to start at slot a, where a =xmodNfor which SFNmodT = floor (x / N) , where N is the number of slots in a radio frame (there are 10 slots per radio frame in this example) .
[0030] FIG. 4 illustrates a sequence of radio frames SFN 0 to SFN 20 that carry four types of SIB. The example illustrated in FIG. 4 may be configured by SIB1 that sets the common SI window w=10 slots and lists SIB types corresponding to index values n=1 / 2 / 3 / 4 (SIB2, SIB3, SIB4, SIB5) , with respective periods T=8 / 8 / 16 / 16. Taking SIB 4 as an example, x = (3-1) ·10 slots or 20 slots. Starting slot number a = 20mod10 or slot 2. The SFN is selected as SFNmod16 =floor (20 slots / 10 slots) or SFN 2. Thus the UE will monitor for SIB4 in slot 2 of radio frames beginning in SFN2 and repeating every 16 radio frames as illustrated in FIG. 4.
[0031] FIG. 5 illustrates the same beam coverage pattern as shown in FIG. 3 and it is assumed that the UE is in beam coverage during T1 and T5. It can be seen that the UE will not be in beam coverage to monitor for SIB4 and SIB5.
[0032] Described herein are systems, methods, and circuitries that provide techniques for improved monitoring for system information in NTNs using beam hopping. The solutions reduce or eliminate system information monitoring when a UE is not in beam coverage and seek to ensure that all monitored system information is scheduled while the UE is in beam coverage.
[0033] SIB1 Monitoring with Extended SSB Periodicity
[0034] To prevent transmission and monitoring of SIB1 when a UE is out of beam coverage as outlined in FIGs. 2 and 3, the periodicity of SIB1, may be increased based on the revisit time R. For example, the periodicity of SIB1 may be increased to be equivalent to the revisit time R, which will align the SIB1 periodicity with the beam coverage pattern period. In legacy systems, the default SSB periodicity in which a UE has continuous beam coverage is 20 ms. The extended SSB periodicity may be expressed as A*20 ms, where A may be a scaling factor being one of {1, 2, 4, 8, 16, 32} which is equivalent to {20 ms, 40 ms, 80 ms, 160 ms, 320 ms, 640 ms} . Returning to FIG. 3, recall that R=8 and setting A to 4 will extend the SSB periodicity from the legacy 2 radio frames or 20 ms to 8 radio frames or 80 ms. This will cause the UE to monitor for SIB1 (and the base station to transmit SIB1 for beam hop position 1) in SFN0 and SFN8. It is noted that an additional offset parameter may be needed to properly align the SIB1 monitoring for UEs in different beam hop positions as will disclosed below.
[0035] The process outlined above with reference to FIG. 2 for determining which radio frames carry monitoring occasions for SIB1 may be modified as follows to account for extended SSB periodicity. Changes to the equations outlined above are marked in bold and underlined. In a first technique the monitored SFNs are determined based on an SFNSSB, which identifies a first SFN in which the UE is in coverage. For example, in FIG. 3, if the UE were in beam coverage in the second beam hop position or T2 which coincides with SFN2 and SFN3, then SFNSSB is SFN2. For operation without shared spectrum channel access and for the SSB block and CORESET multiplexing pattern 1, a UE monitors PDCCH in the Type0-PDCCH common search space set over two slots. For SSB with index i the UE determines an index of a first slot n0 of the two slots as follows. that is in a frame with SFNC satisfying SFNCmod (2 *A) = SFNSSBmod (2 *A) if or in a frame with SFNC satisfying SFNCmod (2 *A) =SFNSSBmod (2 *A) +1 if Recall that SFNSSB is the first system frame number in which the UE receives SSB (is in beam coverage) . When the UE is in beam coverage during T2, SFNSSB is SFN2. According to the above, frames are determined as SFN2mod (2·4) or SFN2 or as SFN2 mod (2·4) +1 or SFN3. The determination of the two monitored slots and the monitored symbols in each slot may remain unchanged from the process outlined above with reference to FIG. 2.
[0036] In a second technique, rather than choosing monitored radio frames based on a first SFN in which the UE receives SSBs (is in beam coverage) , an offset value SFNOFFSET is determined for the UE based the radio frames in which the UE receives SSBs or the beam hop of the beam coverage pattern in which the UE is covered by the beam. For example, in FIG. 3 if the UE receives SSBs in the second beam hop position or T2, covering SFN2 and SFN3, SFNOFFSET may be calculated as SFNSSB mod (2·A) or (2·A) –SFNSSB mod (2·A) . For example, SFNOFFSET = SFN2 mod 8 = 2 radio frames. The offset is applied (either added or subtracted) to the SFNC in the determination of monitored radio frames outlined above with reference to FIG. 2.
[0037] For operation without shared spectrum channel access and for the SSB block and CORESET multiplexing pattern 1, a UE monitors PDCCH in the Type0-PDCCH common search space set over two slots. For SSB with index i the UE determines an index of a first slot n0 of the two slots as follows. that is in a frame with SFNC satisfying (SFNC + SFNOFFSET) mod (2 *A) = 0 if or in a frame with SFNC satisfying (SFNC + SFNOFFSET) mod (2 *A) =1 if When the UE is in beam coverage during T2, SFNOFFEST is 2. According to the above, frames are determined as SFN2 mod (2·4) or SFN2 mod (2·4) +1 or SFN3. The determination of the two monitored slots and the monitored symbols in each slot may remain unchanged from the process outlined above with reference to FIG. 2.
[0038] In some examples, SFNOFFSET may be subtracted from SFNC rather than added to SFNC, which yields similar results in which the monitored radio frames align with the beam coverage for the UE. For SSB with index i the UE determines an index of a first slot n0 of the two slots as follows. that is in a frame with SFNC satisfying (SFNC -SFNOFFSET) mod (2 *A) = 0 if or in a frame with SFNC satisfying (SFNC -SFNOFFSET) mod (2 *A) = 1 if
[0039] Other SIB Monitoring with Extended SSB Periodicity
[0040] As discussed with reference to FIGs. 4 and 5, a beam coverage pattern periodicity (e.g., extended SSB periodicity) may prevent a UE from receiving SIBs as originally configured by SIB1 without consideration of beam hopping.
[0041] FIG. 6 illustrates a sequence of radio frames SFN0-SFN36 during which a UE monitors for SIBs. The beam coverage pattern for the UE is different from the pattern outlined in FIGs. 3 and 5. The beam pattern for the examples illustrated in FIGs. 6-8 repeats every 16 radio frames (i.e., the revisit time (R) or extended SSB periodicity is 16) . The dwell time (D) for this beam pattern is 2 radio frames. The radio frames during which the UE is in coverage are shaded (e.g., SFN0, SFN1, SFN16, SFN 17, SFN32, SFN33 in the illustrated sequence) . Radio frame size N is 10 slots.
[0042] As illustrated in FIG. 6, as configured by SIB1, the UE monitors for S=4 SIBs, namely SIB2, SIB3, SIB4, SIB5 as configured by SI window w=10 slots, index n=1 / 2 / 3 / 4 and SIB periodicity T=8 / 8 / 16 / 32. It can be seen that the UE will not be in coverage to receive SIB4 and SIB5 and will not be in coverage to receive all configured SIB2 and SIB3. To compensate for the misalignment of SIBs and UE beam coverage, the manner in which a UE monitors for SIBs may be adapted to allow a UE to monitor for all SIBs during beam coverage.
[0043] Referring to FIG. 7, in a first technique the SI window w is reduced so that more SIBs may be monitored during the dwell time of the beam. In the illustrated example, the adapted SI window w’ is determined based on D / Sor the dwell time in slots (e.g., 2 radio frames or 20 slots) divided by the number of SIBs (e.g., 4) . Thus w’ =20 / 4 or 5 slots. In this manner the UE monitors for multiple different SIBs in a given radio frame instead of one SIB.
[0044] An adapted SIB periodicity T’ may be determined for each SIB based on the extended SSB periodicity or revisit time R. R=16 in the example of FIGs. 6-8. In one approach, T’ is chosen as the maximum value as between the configured value T for the SIB and R. In another approach T’ is chosen as R for all SIBs (meaning all SIBs will have the same periodicity) . In another approach, T’ is determined to be the least common multiple of T and R. In another approach, T’ is determined as B·R, where B is the smallest integer such that B*R ≥ T.
[0045] Accordingly, to monitor for SIBn xn= (n-1) *w’ and the SI window w’ starts at slot a, where a=x mod N in the radio frame for which where N is the number of slots in a radio frame, and corresponds a specific instance of beam coverage for the UE within the beam coverage pattern period in which the UE receives SSBs, and SFNOFFSET depends on the SFN in which the UE receives SSBs (or SFNSSB) . SFNOFFSET may be equal to SFNSSB mod (2·A) or (2·A) -SFNSSB mod (2·A) , recalling that A is a function of the extended SSB periodicity and is equal to 4 in the current example (because extended SSB periodicity is 80 ms) .
[0046] For the example of FIG. 7, with D=2, R=16, S=4, A=4, N=10, w’ =5 slots, it can be seen that SIB2 (n=1) will have x = (1-1) *5 = 0. If T’ for SIB2 is determined to be 16 (e.g., as the maximum value between the configured T (8) and R (16) ) , then SFNOFFSET = SFNSSB mod A or 0. The SFN for monitoring is Thus, the UE monitors for SIB2 in SFN0, SFN16, SFN32... as shown in FIG. 7. Similarly for SIB5 (n=4) will have x = (4-1) *5 or 15 and T’ of 32 (configured T (32) is greater than R (16) ) . SFNOFFSET = SFNSSB mod (2·A) or 0. The SFN for monitoring is Thus, the UE monitors for SIB2 in SFN1, SFN33... as shown in FIG. 7.
[0047] In a second technique, illustrated in FIG. 8, the SIBs are distributed over more than one dwell time (D=2 radio frames in the illustrated example) while keeping the SI window size the same (w=10 slots in the illustrated example) . First, the number of radio frames needed to transmit all SIBs is determined as D’ =w*S (where is S is the total number of SIBs or 4 in the example) . Thus D’ = 10 slots *4 SIBs = 40 slots or 4 radio frames. Then the number of dwell times needed for all SIBs is calculated as dwell times. The base periodicity of the SIBs Ttemp is set as or 2 · 16 = 32 radio frames in the example. The periodicity Tn for each corresponding SIB (n+1) is updated based on the base periodicity.
[0048] In a first option, if Tn ≤ Ttemp, then Tn’ is set to Ttemp, and if Tn > Ttemp, then Tn’ is set to Tn. Thus in the example where Ttemp is 32 radio frames, for a SIB where Tn is 16 then Tn’ is set to 32 radio frames. For a SIB where Tn is 64 then Tn’ is set to 64 radio frames.
[0049] In a second option, Tn’ is set to In this example for a SIB where Tn is 16 then Tn’ is set to 64 radio frames. For a SIB where Tn is 64 then Tn’ is set to 256 radio frames.
[0050] In a third option, Tn’ is set to Ttemp for all configured SIBs regardless of Tn for the individual SIBs.
[0051] With the number of dwell times D’ and the updated periodicity Tn’ for each SIB determined as per the above description, the SFNs to be monitored for the different SIBs may be determined as follows.
[0052] Accordingly, to monitor for SIB (n+1) , xn = (n-1) *w and the SI window w starts at slot a, where a=x mod N in the radio frame for which where N is the number of slots in a radio frame, and corresponds a specific instance of beam coverage for the UE within the beam coverage pattern period in which the UE receives SSBs, and SFNOFFSET depends on the SFN in which the UE receives SSBs (or SFNSSB) . SFNOFFSET may be equal to SFNSSB mod (2·A) or (2·A) –SFNSSB mod (2·A) , recalling that A is a function of the extended SSB periodicity and is equal to 4 in the current example (because extended SSB periodicity is 80 ms) .
[0053] In the example shown in FIG. 8, w=10, D=2, R=16, N=10, D’ =4, and Ttemp = 32 as described above. For SIB2 (n=1, Tn=8) , will have x = (1-1) *10 or 0 and T’ of 32 (as per option 1 or option 2) . SFNOFFSET = SFNSSB mod (2·A) or 0. The SFN for monitoring is Thus, the UE monitors for SIB2 in SFN0, SFN32... as shown in FIG. 8.
[0054] For SIB5 (n=4, Tn=32) , will have x = (4-1) *10 or 30 and T’ of 32 (as per option 1) or 128 (as per option 2) . SFNOFFSET = SFNSSB mod (2·A) or 0. The SFN for monitoring is Thus, the UE monitors for SIB5 in SFN17, SFN49... for T’ = 32 as per option one. When T’ = 128, then the UE monitors for SIB5 in SFN17, SFN145...
[0055] FIG. 9 is a flow diagram illustrating an example method 900 for monitoring for system information block 1 (SIB1) . The method may be performed, for example, by a UE 110 of FIG. 1. The method includes, at 910, determining a sequence of radio frames to monitor for system information block 1 (SIB1) based on a beam coverage pattern with respect to a UE. The sequence of radio frames includes more than one radio frame between successive radio frames in the sequence (which is different than a legacy system in which SIB1 is monitored in every other radio frame) . The method includes, at 920, monitoring for SIB1 during the sequence of radio frames.
[0056] In some examples, the method includes determining the sequence of radio frames based on a periodicity of the beam coverage pattern, for example based on a scaling factor that represents a ratio (e.g., referred to as A above) between a legacy default synchronization signal block (SSB) periodicity in which the UE has continuous beam coverage and the periodicity of the beam coverage pattern (referred to as R above) . The method may include determining the sequence of radio frames based on SFNSSBmod (2*A) where SFNSSB is a first system frame number (SFN) during which the UE has beam coverage in the beam coverage pattern and A is a ratio between a base beam coverage pattern periodicity in which the UE has continuous beam coverage and the beam coverage pattern periodicity.
[0057] In some examples, the method includes determining the sequence of radio frames based on an offset that represents a number of radio frames between a first radio frame of the beam coverage pattern and a first radio frame during which the UE has beam coverage in the beam coverage pattern. The sequence of radio frames may be determined based on SFNC + SFNOFFSET mod (2*A) where SFNC is a first system frame number (SFN) in the beam coverage pattern and SFNOFFSET represents a number of radio frames between SFNC and a first radio frame during which the UE has beam coverage in the beam coverage pattern. Alternatively, the sequence of radio frames may be determined based on SFNC -SFNOFFSET mod (2*A) where SFNC is a first system frame number (SFN) in the beam coverage pattern and SFNOFFSET represents a number of radio frames between SFNC and a first radio frame during which the UE has beam coverage in the beam coverage pattern.
[0058] FIG. 10 is flow diagram outlining an example method 1000 for monitoring for system information. The method may be performed by a UE 110 of FIG. 1. The method includes, at 1010, determining a sequence of radio frames to monitor for one or more system information block types (SIBs) based on a dwell time or periodicity of beam coverage pattern with respect to a UE. The UE is out of beam coverage during one or more radio frames according to the beam coverage pattern as shown in FIGs. 3 and 5. Examples of sequences of radio frames that are determined based on a dwell time or periodicity of beam coverage pattern with respect to a UE are shown in FIGs. 7 and 8. The method includes, at 1020, monitoring for the one or more SIBs during the sequence of radio frames.
[0059] In some examples, as shown in FIG. 7, the method includes receiving configuration of one or more configured SIBs. The configuration includes a system information (SI) window w and a configured period T for each configured SIB. A duration of the SI window is reduced based on a number of configured SIBs and the dwell time to generate a reduced SI window w’ . The sequence of radio frames is determined based on the reduced SI window. In some examples, the method includes reducing the duration of the SI window such that all configured SIBs may be monitored in a single dwell time.
[0060] In some examples, the method includes determining an adjusted configured period T’for one or more configured SIBs based on the periodicity of the beam coverage pattern and determining the sequence of radio frames based on the reduced duration SI window w’ and the adjusted configured period T’ for the one or more configured SIBs. The adjusted configured period for one or more SIBs may determined as one of a maximum value as between the configured period and the periodicity of the beam coverage pattern; the periodicity of the beam coverage pattern; a least common multiple of the configured period and the periodicity of the beam coverage pattern; or a smallest integer, such that a product of the integer and the periodicity of the beam coverage pattern is greater than or equal to the configured period.
[0061] In some examples, as shown in FIG. 8, the method includes adjusting the configured period of one or more configured SIBs based on a dwell time and a number of configured SIBs and determining the sequence of radio frames based on the periodicity of the beam coverage pattern, the dwell time, and the adjusted configured period for the one or more configured SIBs. In some examples, the method includes adjusting the configured period of the one or more configured SIBs such that the configured SIBs are spread over multiple dwell times of the beam coverage pattern as shown in FIG. 8.
[0062] The adjusted configuration period for a SIB may be determined by setting the adjusted configured period to the larger of the configured period or a base periodicity comprising a product of the number of dwell times required to transmit all configured SIBs and the periodicity of the beam coverage pattern; setting the adjusted configured period to the configured period divided by a constant multiplied by the base periodicity; or setting the adjusted configured period for all configured SIBs to the base periodicity.
[0063] FIG. 11 is flow diagram outlining an example method 1100 for transmitting system information for a UE that is out of beam coverage during at least a portion of a beam coverage pattern. The method may be performed, for example, by an NTN based RAN node 160 of Fig. 1. The method includes, at 1110, determining a sequence of radio frames in which to transmit system information based on a beam coverage pattern for the UE. At 1120, the method includes causing transmission of system information during the sequence of radio frames.
[0064] In some examples, the method includes determining the sequence of radio frames for transmitting system information block 1 (SIB1) based on a periodicity of the beam coverage pattern. The method may include determining the sequence of radio frames based on a scaling factor that represents a ratio between a legacy default synchronization signal block (SSB) periodicity in which the UE has continuous beam coverage and the beam coverage pattern periodicity.
[0065] In some examples, as shown in FIG. 7 the method may include identifying configuration of one or more configured SIBs, the configuration comprising a system information (SI) window and a configured period for each configured SIB; reducing a duration of the SI window based on a number of configured SIBs and a dwell time of the beam coverage pattern; and determining the sequence of radio frames based on the reduced SI window. In some examples, the duration of the SI window is reduced such that all configured SIBs may be monitored in a single dwell time.
[0066] In some examples, as shown in FIG. 8, the method includes adjusting the configured period of the one or more configured SIBs such that the configured SIBs are spread over multiple dwell times of the beam coverage pattern.
[0067] Above are several flow diagrams outlining example methods and exchanges of messages. In this description and the appended claims, use of the term “determine” with reference to some entity (e.g., parameter, variable, and so on) in describing a method step or function is to be construed broadly. For example, “determine” is to be construed to encompass, for example, receiving and parsing a communication that encodes the entity or a value of an entity. “Determine” should be construed to encompass accessing and reading memory (e.g., lookup table, register, device memory, remote memory, and so on) that stores the entity or value for the entity. “Determine” should be construed to encompass computing or deriving the entity or value of the entity based on other quantities or entities. “Determine” should be construed to encompass any manner of deducing or identifying an entity or value of the entity.
[0068] As used herein, the term identify when used with reference to some entity or value of an entity is to be construed broadly as encompassing any manner of determining the entity or value of the entity. For example, the term identify is to be construed to encompass, for example, receiving and parsing a communication that encodes the entity or a value of the entity. The term identify should be construed to encompass accessing and reading memory (e.g., device queue, lookup table, register, device memory, remote memory, and so on) that stores the entity or value for the entity.
[0069] As used herein, the term encode when used with reference to some entity or value of an entity is to be construed broadly as encompassing any manner or technique for generating a data sequence or signal that communicates the entity to another component.
[0070] As used herein, the term select when used with reference to some entity or value of an entity is to be construed broadly as encompassing any manner of determining the entity or value of the entity from amongst a plurality or range of possible choices. For example, the term select is to be construed to encompass accessing and reading memory (e.g., lookup table, register, device memory, remote memory, and so on) that stores the entities or values for the entity and returning one entity or entity value from amongst those stored. The term select is to be construed as applying one or more constraints or rules to an input set of parameters to determine an appropriate entity or entity value. The term select is to be construed as broadly encompassing any manner of choosing an entity based on one or more parameters or conditions.
[0071] As used herein, the term derive when used with reference to some entity or value of an entity is to be construed broadly. “Derive” should be construed to encompass accessing and reading memory (e.g., lookup table, register, device memory, remote memory, and so on) that stores some initial value or foundational values and performing processing and / or logical / mathematical operations on the value or values to generate the derived entity or value for the entity. The term derive should be construed to encompass computing or calculating the entity or value of the entity based on other quantities or entities. The term derive should be construed to encompass any manner of deducing or identifying an entity or value of the entity.
[0072] As used herein, the term indicate when used with reference to some entity (e.g., parameter or setting) or value of an entity is to be construed broadly as encompassing any manner of communicating the entity or value of the entity either explicitly or implicitly. For example, bits within a transmitted message may be used to explicitly encode an indicated value or may encode an index or other indicator that is mapped to the indicated value by prior configuration. The absence of a field within a message may implicitly indicate a value of an entity based on prior configuration.
[0073] Wireless Network and Device Overview
[0074] FIG. 12 is an example network 1200 according to one or more implementations described herein. Example network 1200 may include UEs 1210-1, 1210-2, etc. (referred to collectively as “UEs 1210” and individually as “UE 1210” ) , a radio access network (RAN) 1220, a core network (CN) 1230, application servers 1240, and external networks 1250. See also UEs 110 of FIG. 1)
[0075] The systems and devices of example network 1200 may operate in accordance with one or more communication standards, such as 2nd generation (2G) , 3rd generation (3G) , 4th generation (4G) (e.g., long-term evolution (LTE) ) , and / or 5th generation (5G) (e.g., new radio (NR) ) communication standards of the 3rd generation partnership project (3GPP) . Additionally, or alternatively, one or more of the systems and devices of example network 1200 may operate in accordance with other communication standards and protocols discussed herein, including future versions or generations of 3GPP standards (e.g., sixth generation (6G) standards, seventh generation (7G) standards, etc. ) , institute of electrical and electronics engineers (IEEE) standards (e.g., wireless metropolitan area network (WMAN) , worldwide interoperability for microwave access (WiMAX) , etc. ) , and more.
[0076] As shown, UEs 1210 may include smartphones (e.g., handheld touchscreen mobile computing devices connectable to one or more wireless communication networks) . Additionally, or alternatively, UEs 1210 may include other types of mobile or non-mobile computing devices capable of wireless communications, such as personal data assistants (PDAs) , pagers, laptop computers, desktop computers, wireless handsets, watches etc. In some implementations, UEs 1210 may include internet of things (IoT) devices (or IoT UEs) that may comprise a network access layer designed for low-power IoT applications utilizing short-lived UE connections. Additionally, or alternatively, an IoT UE may utilize one or more types of technologies, such as machine-to-machine (M2M) communications or machine-type communications (MTC) (e.g., to exchanging data with an MTC server or other device via a public land mobile network (PLMN) ) , proximity-based service (ProSe) or device-to-device (D2D) communications, sensor networks, IoT networks, and more. Depending on the scenario, an M2M or MTC exchange of data may be a machine-initiated exchange, and an IoT network may include interconnecting IoT UEs (which may include uniquely identifiable embedded computing devices within an Internet infrastructure) with short-lived connections. In some scenarios, IoT UEs may execute background applications (e.g., keep-alive messages, status updates, etc. ) to facilitate the connections of the IoT network.
[0077] UEs 1210 may communicate with one another via one or more wireless channels 1212, each of which may comprise a physical communications interface / layer. The connection may include an M2M connection, MTC connection, D2D connection, SL connection, etc. The connection may involve a PC5 interface. In some implementations, UEs 1210 may be configured to discover one another, negotiate wireless resources between one another, and establish connections between one another, without intervention or communications involving RAN node 1222 or another type of network node. In some implementations, discovery, authentication, resource negotiation, registration, etc., may involve communications with RAN node 1222 or another type of network node.
[0078] UEs 1210 may communicate and establish a connection with (e.g., be communicatively coupled) with RAN 1220, which may involve one or more wireless channels 1214-1 and 1214-2, each of which may comprise a physical communications interface / layer. UEs 1210 may use stored instructions and information that enable the UE 1210 to determine a sequence of radio frames to monitor for system information based on a beam coverage pattern as described above with reference to FIGs. 1-11.
[0079] As shown, UE 1210 may also, or alternatively, connect to access point (AP) 1216 via connection interface 1218, which may include an air interface enabling UE 1210 to communicatively couple with AP 1216. AP 1216 may comprise a wireless local area network (WLAN) , WLAN node, WLAN termination point, etc. The connection 1218 may comprise a local wireless connection, such as a connection consistent with any IEEE 702.11 protocol, and AP 1216 may comprise a wireless fidelity router or other AP. While not explicitly depicted in FIG. 12, AP 1216 may be connected to another network (e.g., the Internet) without connecting to RAN 1220 or CN 1230.
[0080] RAN 1220 may include one or more RAN nodes 1222-1 and 1222-2 (referred to collectively as RAN nodes 1222, and individually as RAN node 1222-see also BS 120, 220, and 720 of FIGs 1, 2A, and 7A, respectively) that enable channels 1214-1 and 1214-2 to be established between UEs 1210 and RAN 1220. RAN nodes 1222 may include network access points configured to provide radio baseband functions for data and / or voice connectivity between users and the network based on one or more of the communication technologies described herein (e.g., 2G, 3G, 4G, 5G, WiFi, etc. ) . As examples therefore, a RAN node may be an E-UTRAN Node B (e.g., an enhanced Node B, eNodeB, eNB, 4G base station, etc. ) , a next generation base station (e.g., a 5G base station, NR base station, next generation eNBs (gNB) , etc. ) . RAN nodes 1222 may include a roadside unit (RSU) , a transmission reception point (TRxP or TRP) , and one or more other types of ground stations (e.g., terrestrial access points) . In some scenarios, RAN node 1222 may be a dedicated physical device, such as a macrocell base station, and / or a low power (LP) base station for providing femtocells, picocells or the like having smaller coverage areas, smaller user capacity, or higher bandwidth compared to macrocells.
[0081] RAN nodes can comprise ground stations (e.g., terrestrial access points) or satellite stations providing coverage within a geographic area (e.g., a cell) . As described above, in some implementations, satellites 1260 may operate as bases stations with respect to UEs. As such, references herein to a base station, RAN node, etc., may involve implementations where the base station, RAN node, etc., is a terrestrial network node and also to implementation where the base station, RAN node, etc., is a non-terrestrial network node (e.g., satellite 1260) .
[0082] As described herein, a RAN node (e.g., base station) 1222 may store instructions and information that enable the RAN node to determine a sequence of radio frames during which to transmit system information based on a beam coverage pattern for a UE as described above with reference to FIGs. 1-11.
[0083] In some implementations, a downlink resource grid may be used for downlink transmissions from any of the RAN nodes 1222 to UEs 1210, and uplink transmissions may utilize similar techniques. The grid may be a time-frequency grid (e.g., a resource grid or time-frequency resource grid) that represents the physical resource for downlink in each slot. Such a time-frequency plane representation is a common practice for OFDM systems, which makes it intuitive for radio resource allocation. Each column and each row of the resource grid corresponds to one OFDM symbol and one OFDM subcarrier, respectively. The duration of the resource grid in the time domain corresponds to one slot in a radio frame. The smallest time-frequency unit in a resource grid is denoted as a resource element. Each resource grid comprises resource blocks, which describe the mapping of certain physical channels to resource elements. Each resource block may comprise a collection of resource elements (REs) ; in the frequency domain, this may represent the smallest quantity of resources that currently may be allocated. There are several different physical downlink channels that are conveyed using such resource blocks.
[0084] The RAN nodes 1222 may be configured to communicate with one another via interface 1223. In implementations where the system is an LTE system, interface 1223 may be an X2 interface. In NR systems, interface 1223 may be an Xn interface. The X2 interface may be defined between two or more RAN nodes 1222 (e.g., two or more eNBs / gNBs or a combination thereof) that connect to evolved packet core (EPC) or CN 1230, or between two eNBs connecting to an EPC.
[0085] As shown, RAN 1220 may be connected (e.g., communicatively coupled) to CN 1230. CN 1230 may comprise a plurality of network elements 1232, which are configured to offer various data and telecommunications services to customers / subscribers (e.g., users of UEs 1210) who are connected to the CN 1230 via the RAN 1220. In some implementations, CN 1230 may include an evolved packet core (EPC) , a 5G CN, and / or one or more additional or alternative types of CNs. The components of the CN 1230 may be implemented in one physical node or separate physical nodes including components to read and execute instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium) . As described herein, the CN may store instructions and information that enable the CN to determine a sequence of radio frames in which system information is transmitted based on a beam coverage pattern as described above with reference to FIGs. 1-11. As shown, CN 1230, application servers 1240, and external networks 1250 may be connected to one another via interfaces 1234, 1236, and 1038, which may include IP network interfaces.
[0086] FIG. 13 is a diagram of an example of components of a network device according to one or more implementations described herein. In some implementations, the device 1300 can include application circuitry 1302, baseband circuitry 1304, RF circuitry 1306, front-end module (FEM) circuitry 1308, one or more antennas 1310, and power management circuitry (PMC) 1312 coupled together at least as shown. The components of the illustrated device 1300 can be included in a UE or a RAN node. In some implementations, the device 1300 can include fewer elements (e.g., a RAN node may not utilize application circuitry 1302, and instead include a processor / controller to process IP data received from a CN or an Evolved Packet Core (EPC) ) . In some implementations, the device 1300 can include additional elements such as, for example, memory / storage, display, camera, sensor (including one or more temperature sensors, such as a single temperature sensor, a plurality of temperature sensors at different locations in device 1300, etc. ) , or input / output (I / O) interface. In other implementations, the components described below can be included in more than one device (e.g., said circuitries can be separately included in more than one device for Cloud-RAN (C-RAN) implementations) .
[0087] The application circuitry 1302 can include one or more application processors. For example, the application circuitry 1302 can include circuitry such as, but not limited to, one or more single-core or multi-core processors. The processor (s) can include any combination of general-purpose processors and dedicated processors (e.g., graphics processors, application processors, etc. ) . The processors can be coupled with or can include memory / storage and can be configured to execute instructions stored in the memory / storage to enable various applications or operating systems to run on the device 1300. In some implementations, processors of application circuitry 1302 can process IP data packets received from an EPC.
[0088] The baseband circuitry 1304 can include circuitry such as, but not limited to, one or more single-core or multi-core processors. The baseband circuitry 1304 can include one or more baseband processors or control logic to process baseband signals received from a receive signal path of the RF circuitry 1306 and to generate baseband signals for a transmit signal path of the RF circuitry 1306. Baseband circuity 1304 can interface with the application circuitry 1302 for generation and processing of the baseband signals and for controlling operations of the RF circuitry 1306. For example, in some implementations, the baseband circuitry 1304 can include a 3G baseband processor 1304A, a 4G baseband processor 1304B, a 5G baseband processor 1304C, or other baseband processor (s) 1304D for other existing generations, generations in development or to be developed in the future (e.g., 5G, 6G, etc. ) .
[0089] The baseband circuitry 1304 (e.g., one or more of baseband processors 1304A-D) can handle various radio control functions that enable communication with one or more radio networks via the RF circuitry 1306. In other implementations, some or all of the functionality of baseband processors 1304A-D can be included in modules stored in the memory 1304G and executed via a Central Processing Unit (CPU) 1304E. In some implementations, the baseband circuitry 1304 can include one or more audio digital signal processor (s) (DSP) 1304F.
[0090] In some implementations, memory 1304G may store instructions and information that enable the device 1300 to determine a sequence of radio frames to monitor for system information based on a beam coverage pattern.
[0091] RF circuitry 1306 can enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium. In various implementations, the RF circuitry 1306 can include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network. RF circuitry 1306 can include a receive signal path which can include circuitry to down-convert RF signals received from the FEM circuitry 1308 and provide baseband signals to the baseband circuitry 1304. RF circuitry 1306 can also include a transmit signal path which can include circuitry to up-convert baseband signals provided by the baseband circuitry 1304 and provide RF output signals to the FEM circuitry 1308 for transmission.
[0092] In some implementations, the receive signal path of the RF circuitry 1306 can include mixer circuitry 1306A, amplifier circuitry 1306B and filter circuitry 1306C. In some implementations, the transmit signal path of the RF circuitry 1306 can include filter circuitry 1306C and mixer circuitry 1306A. RF circuitry 1306 can also include synthesizer circuitry 1306D for synthesizing a frequency for use by the mixer circuitry 1306A of the receive signal path and the transmit signal path.
[0093] Examples herein can include subject matter such as a method, means for performing acts or blocks of the method, at least one machine-readable medium including executable instructions that, when performed by a machine or circuitry (e.g., a processor (e.g., processor , etc. ) with memory, an application-specific integrated circuit (ASIC) , a field programmable gate array (FPGA) , or the like) cause the machine to perform acts of the method or of an apparatus or system for concurrent communication using multiple communication technologies according to implementations and examples described.
[0094] Examples
[0095] Example 1 is a baseband processor, including a memory configured to store instructions and a processor coupled to the memory and, when executing instructions, configured to determine a sequence of radio frames to monitor for system information block 1 (SIB1) based on a beam coverage pattern with respect to a user equipment (UE) , wherein the sequence of radio frames includes more than one radio frame between successive radio frames in the sequence; and monitor for SIB1 during the sequence of radio frames.
[0096] Example 2 includes the subject matter of example 1, including or omitting optional elements, wherein the processor is configured to determine the sequence of radio frames based on a periodicity of the beam coverage pattern.
[0097] Example 3 includes the subject matter of example 1, including or omitting optional elements, wherein the processor is configured to determine the sequence of radio frames based on a scaling factor that represents a ratio between a legacy default synchronization signal block (SSB) periodicity in which the UE has continuous beam coverage and the periodicity of the beam coverage pattern.
[0098] Example 4 includes the subject matter of example 1, including or omitting optional elements, wherein the processor is configured to determine the sequence of radio frames based on SFNSSB mod (2*A) where SFNSSB is a first system frame number (SFN) during which the UE has beam coverage in the beam coverage pattern and A is a ratio between a base beam coverage pattern periodicity in which the UE has continuous beam coverage and the beam coverage pattern periodicity.
[0099] Example 5 includes the subject matter of example 1, including or omitting optional elements, wherein the processor is configured to determine the sequence of radio frames based on an offset that represents a number of radio frames between a first radio frame of the beam coverage pattern and a first radio frame during which the UE has beam coverage in the beam coverage pattern.
[0100] Example 6 includes the subject matter of example 1, including or omitting optional elements, wherein the processor is configured to determine the sequence of radio frames based on SFNC + SFNOFFSET mod (2*A) where SFNC is a first system frame number (SFN) in the beam coverage pattern and SFNOFFSET represents a number of radio frames between SFNC and a first radio frame during which the UE has beam coverage in the beam coverage pattern.
[0101] Example 7 includes the subject matter of example 1, including or omitting optional elements, wherein the processor is configured to determine the sequence of radio frames based on SFNC -SFNOFFSET mod (2*A) where SFNC is a first system frame number (SFN) in the beam coverage pattern and SFNOFFSET represents a number of radio frames between SFNC and a first radio frame during which the UE has beam coverage in the beam coverage pattern.
[0102] Example 8 is a baseband processor, including a memory configured to store instructions and a processor coupled to the memory and, when executing instructions, configured to determine a sequence of radio frames to monitor for one or more system information block types (SIBs) based on a dwell time or periodicity of beam coverage pattern with respect to a user equipment (UE) , wherein a UE is out of beam coverage during one or more radio frames according to the beam coverage pattern; and monitor for the one or more SIBs during the sequence of radio frames.
[0103] Example 9 includes the subject matter of example 8, including or omitting optional elements, wherein the processor is configured to receive configuration of one or more configured SIBs, the configuration including a system information (SI) window and a configured period for each configured SIB; reduce a duration of the SI window based on a number of configured SIBs and the dwell time; and determine the sequence of radio frames based on the reduced SI window.
[0104] Example 10 includes the subject matter of example 9, including or omitting optional elements, wherein the duration of the SI window is reduced such that all configured SIBs may be monitored in a single dwell time.
[0105] Example 11 includes the subject matter of example 9, including or omitting optional elements, wherein the processor is configured to determine an adjusted configured period for one or more configured SIBs based on the periodicity of the beam coverage pattern; and determine the sequence of radio frames based on the reduced duration SI window and the adjusted configured period for the one or more configured SIBs.
[0106] Example 12 includes the subject matter of example 11, including or omitting optional elements, wherein the processor is configured to determine the adjusted configured period for one or more SIBs as one of a maximum value as between the configured period and the periodicity of the beam coverage pattern; the periodicity of the beam coverage pattern; a least common multiple of the configured period and the periodicity of the beam coverage pattern; or a smallest integer, such that a product of the integer and the periodicity of the beam coverage pattern is greater than or equal to the configured period.
[0107] Example 13 includes the subject matter of example 9, including or omitting optional elements, wherein the processor is configured to adjust the configured period of one or more configured SIBs based on a dwell time and a number of configured SIBs; and determine the sequence of radio frames based on the periodicity of the beam coverage pattern, the dwell time, and the adjusted configured period for the one or more configured SIBs.
[0108] Example 14 includes the subject matter of example 13, including or omitting optional elements, wherein the processor is configured to adjust the configured period of the one or more configured SIBs such that the configured SIBs are spread over multiple dwell times of the beam coverage pattern.
[0109] Example 15 includes the subject matter of example 13, including or omitting optional elements, wherein the processor is configured to adjust the configured period of the one or more configured SIBs by setting the adjusted configured period to the larger of the configured period or a base periodicity including a product of the number of dwell times required to transmit all configured SIBs and the periodicity of the beam coverage pattern; setting the adjusted configured period to the configured period divided by a constant multiplied by the base periodicity; or setting the adjusted configured period for all configured SIBs to the base periodicity.
[0110] Example 16 is a baseband processor, including a memory configured to store instructions and a processor coupled to the memory and, when executing instructions, configured to determine a sequence of radio frames in which to transmit system information based on a beam coverage pattern for a user equipment (UE) that is out of beam coverage during a portion of the beam coverage pattern; and cause transmission of system information during the sequence of radio frames.
[0111] Example 17 includes the subject matter of example 16, including or omitting optional elements, wherein the processor is configured to determine the sequence of radio frames for transmitting system information block 1 (SIB1) based on a periodicity of the beam coverage pattern.
[0112] Example 18 includes the subject matter of example 16, including or omitting optional elements, wherein the processor is configured to determine the sequence of radio frames based on a scaling factor that represents a ratio between a legacy default synchronization signal block (SSB) periodicity in which the UE has continuous beam coverage and the beam coverage pattern periodicity.
[0113] Example 19 includes the subject matter of example 16, including or omitting optional elements, wherein the processor is configured to identify a configuration of one or more configured SIBs, the configuration including a system information (SI) window and a configured period for each configured SIB; reduce a duration of the SI window based on a number of configured SIBs and a dwell time of the beam coverage pattern; and determine the sequence of radio frames based on the reduced SI window.
[0114] Example 20 includes the subject matter of example 19, including or omitting optional elements, wherein the duration of the SI window is reduced such that all configured SIBs may be monitored in a single dwell time.
[0115] Example 21 includes the subject matter of example 19, including or omitting optional elements, wherein the processor is configured to adjust the configured period of the one or more configured SIBs such that the configured SIBs are spread over multiple dwell times of the beam coverage pattern.
[0116] Example 22 is a method that includes functions corresponding to the operations performed by a baseband processor of examples 1-21.
[0117] Example 23 is an apparatus that includes means for performing functions corresponding to the operations performed by the baseband processor of examples 1-21.
[0118] Example 24 is an apparatus that includes means for performing functions corresponding to the operations performed by the baseband processor of any of examples 1-21.
[0119] Example 25 is a UE that includes the baseband processor of any of examples 1-21.
[0120] Example 26 is a base station that includes the baseband processor of any of examples 16-21.
[0121] The above description of illustrated examples, implementations, aspects, etc., of the subject disclosure, including what is described in the Abstract, is not intended to be exhaustive or to limit the disclosed aspects to the precise forms disclosed. While specific examples, implementations, aspects, etc., are described herein for illustrative purposes, various modifications are possible that are considered within the scope of such examples, implementations, aspects, etc., as those skilled in the relevant art can recognize.
[0122] While the methods are illustrated and described above as a series of acts or events, it will be appreciated that the illustrated ordering of such acts or events are not to be interpreted in a limiting sense. For example, some acts may occur in different orders and / or concurrently with other acts or events apart from those illustrated and / or described herein. In addition, not all illustrated acts may be required to implement one or more aspects or embodiments of the disclosure herein. Also, one or more of the acts depicted herein may be carried out in one or more separate acts and / or phases. In some embodiments, the methods illustrated above may be implemented in a computer readable medium using instructions stored in a memory. Many other embodiments and variations are possible within the scope of the claimed disclosure.
[0123] The term “couple” is used throughout the specification. The term may cover connections, communications, or signal paths that enable a functional relationship consistent with the description of the present disclosure. For example, if device A generates a signal to control device B to perform an action, in a first example device A is coupled to device B, or in a second example device A is coupled to device B through intervening component C if intervening component C does not substantially alter the functional relationship between device A and device B such that device B is controlled by device A via the control signal generated by device A.
[0124] It is well understood that the use of personally identifiable information should follow privacy policies and practices that are generally recognized as meeting or exceeding industry or governmental requirements for maintaining the privacy of users. In particular, personally identifiable information data should be managed and handled so as to minimize risks of unintentional or unauthorized access or use, and the nature of authorized use should be clearly indicated to users.
Claims
1.A baseband processor, comprising a memory configured to store instructions and a processor coupled to the memory and, when executing instructions, configured to:determine a sequence of radio frames to monitor for system information block 1 (SIB1) based on a beam coverage pattern with respect to a user equipment (UE) , wherein the sequence of radio frames includes more than one radio frame between successive radio frames in the sequence; andmonitor for SIB1 during the sequence of radio frames.2.The baseband processor of claim 1, wherein the processor is configured to determine the sequence of radio frames based on a periodicity of the beam coverage pattern.3.The baseband processor of claim 1, wherein the processor is configured to determine the sequence of radio frames based on a scaling factor that represents a ratio between a legacy default synchronization signal block (SSB) periodicity in which the UE has continuous beam coverage and the periodicity of the beam coverage pattern.4.The baseband processor of claim 1, wherein the processor is configured to determine the sequence of radio frames based on SFNSSB mod (2*A) where SFNSSB is a first system frame number (SFN) during which the UE has beam coverage in the beam coverage pattern and A is a ratio between a base beam coverage pattern periodicity in which the UE has continuous beam coverage and the beam coverage pattern periodicity.5.The baseband processor of claim 1, wherein the processor is configured to determine the sequence of radio frames based on an offset that represents a number of radio frames between a first radio frame of the beam coverage pattern and a first radio frame during which the UE has beam coverage in the beam coverage pattern.6.The baseband processor of claim 1, wherein the processor is configured to determine the sequence of radio frames based on SFNC + SFNOFFSET mod (2*A) where SFNC is a first system frame number (SFN) in the beam coverage pattern and SFNOFFSET represents a number of radio frames between SFNC and a first radio frame during which the UE has beam coverage in the beam coverage pattern.7.The baseband processor of claim 1, wherein the processor is configured to determine the sequence of radio frames based on SFNC -SFNOFFSET mod (2*A) where SFNC is a first system frame number (SFN) in the beam coverage pattern and SFNOFFSET represents a number of radio frames between SFNC and a first radio frame during which the UE has beam coverage in the beam coverage pattern.8.A baseband processor, comprising a memory configured to store instructions and a processor coupled to the memory and, when executing instructions, configured to:determine a sequence of radio frames to monitor for one or more system information block types (SIBs) based on a dwell time or periodicity of beam coverage pattern with respect to a user equipment (UE) , wherein a UE is out of beam coverage during one or more radio frames according to the beam coverage pattern; andmonitor for the one or more SIBs during the sequence of radio frames.9.The baseband processor of claim 8, wherein the processor is configured toreceive configuration of one or more configured SIBs, the configuration comprising a system information (SI) window and a configured period for each configured SIB;reduce a duration of the SI window based on a number of configured SIBs and the dwell time; anddetermine the sequence of radio frames based on the reduced SI window.10.The baseband processor of claim 9, wherein the duration of the SI window is reduced such that all configured SIBs may be monitored in a single dwell time.11.The baseband processor of claim 9, wherein the processor is configured todetermine an adjusted configured period for one or more configured SIBs based on the periodicity of the beam coverage pattern; anddetermine the sequence of radio frames based on the reduced duration SI window and the adjusted configured period for the one or more configured SIBs.12.The baseband processor of claim 11, wherein the processor is configured to determine the adjusted configured period for one or more SIBs as one ofa maximum value as between the configured period and the periodicity of the beam coverage pattern;the periodicity of the beam coverage pattern;a least common multiple of the configured period and the periodicity of the beam coverage pattern; ora smallest integer, such that a product of the integer and the periodicity of the beam coverage pattern is greater than or equal to the configured period.13.The baseband processor of claim 9, wherein the processor is configured toadjust the configured period of one or more configured SIBs based on a dwell time and a number of configured SIBs; anddetermine the sequence of radio frames based on the periodicity of the beam coverage pattern, the dwell time, and the adjusted configured period for the one or more configured SIBs.14.The baseband processor of claim 13, wherein the processor is configured to adjust the configured period of the one or more configured SIBs such that the configured SIBs are spread over multiple dwell times of the beam coverage pattern.15.The baseband processor of claim 13, wherein the processor is configured to adjust the configured period of the one or more configured SIBs bysetting the adjusted configured period to the larger of the configured period or a base periodicity comprising a product of the number of dwell times required to transmit all configured SIBs and the periodicity of the beam coverage pattern;setting the adjusted configured period to the configured period divided by a constant multiplied by the base periodicity; orsetting the adjusted configured period for all configured SIBs to the base periodicity.16.A baseband processor, comprising a memory configured to store instructions and a processor coupled to the memory and, when executing instructions, configured to:determine a sequence of radio frames in which to transmit system information based on a beam coverage pattern for a user equipment (UE) that is out of beam coverage during a portion of the beam coverage pattern; andcause transmission of system information during the sequence of radio frames.17.The baseband processor of claim 16, wherein the processor is configured to determine the sequence of radio frames for transmitting system information block 1 (SIB1) based on a periodicity of the beam coverage pattern.18.The baseband processor of claim 17, wherein the processor is configured to determine the sequence of radio frames based on a scaling factor that represents a ratio between a legacy default synchronization signal block (SSB) periodicity in which the UE has continuous beam coverage and the beam coverage pattern periodicity.19.The baseband processor of claim 16, wherein the processor is configured toidentify a configuration of one or more configured SIBs, the configuration comprising a system information (SI) window and a configured period for each configured SIB;reduce a duration of the SI window based on a number of configured SIBs and a dwell time of the beam coverage pattern; anddetermine the sequence of radio frames based on the reduced SI window.20.The baseband processor of claim 19, wherein the duration of the SI window is reduced such that all configured SIBs may be monitored in a single dwell time.21.The baseband processor of claim 19, wherein the processor is configured to adjust the configured period of the one or more configured SIBs such that the configured SIBs are spread over multiple dwell times of the beam coverage pattern.
Citation Information
Patent Citations
Systematic and semi deterministic mapping between synchronization signal block IDS and physical transmission beams for more efficient beam management
WO2023196088A1
Systems and methods for system information accumulation in internet of things non-terrestrial networks
WO2023203556A1