Flexible searcher occupancy assignment for carrier aggregation radio resource management measurement
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2026-08-13
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Figure CN2025075714_13082026_PF_FP_ABST
Abstract
Description
FLEXIBLE SEARCHER OCCUPANCY ASSIGNMENT FOR CARRIER AGGREGATION RADIO RESOURCE MANAGEMENT MEASUREMENTFIELD
[0001] This disclosure relates to wireless communication networks including techniques for radio resource management in wireless networks.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 radio frequencies and / or other wireless resources may be arranged, allocated, etc., for communications between wireless devices, such as user equipment (UE) device, base stations, etc. Additionally, an aspect of allocating resources may include synchronizing wireless devices to communicate with one another, which may involve a period of signal measurement that is sometimes referred to as a measurement gap.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 wireless network utilizing carrier aggregation.
[0005] FIG. 2 includes timing diagrams illustrating measurement objectives associated with six component carriers, in accordance with various aspects described herein.
[0006] FIG. 3 is a message flow diagram illustrating an example searcher allocation and measurement process, in accordance with various aspects described herein.
[0007] FIGs. 4A and 4B are a message flow diagrams illustrating an example searcher allocation and measurement processes, in accordance with various aspects described herein.
[0008] FIG. 5A is a flow diagram illustrating an example searcher allocation and measurement method, in accordance with various aspects described herein.
[0009] FIG. 5B is a flow diagram illustrating an example searcher allocation and measurement method, in accordance with various aspects described herein.
[0010] FIG. 6 is a diagram of an example of wireless network according to one or more implementations described herein.
[0011] FIG. 7 is a diagram of an example of components of a device according to one or more implementations described herein.DETAILED DESCRIPTION
[0012] 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.Carrier Aggregation Overview
[0013] In carrier aggregation, two or more component carriers (CCs) are combined to form a single or multiple data channels thereby increasing the data rate and enhancing load balancing. CCs may be identified or referred to herein based on a serving cell index or cell index (cell, serving cell, and CC may be used interchangeably) that relates to a particular transmission / reception point that generates signals carried by the CC. Thus, two different CCs may have the same or similar frequencies but can be supported by different cells.
[0014] When a UE is connected to the network, the UE camps on or communicates with the network using a primary cell for that UE. The component carrier for the primary cell for a particular UE is indicated as CC0. When the UE is configured for carrier aggregation, one cell is designated as the primary cell (PCell) and the other cells or CCs are designated as secondary cells (SCells) . The PCell may be used to communicate control information and data whilst the SCells may carry data only. A master node (MN) is a transmission / reception point that supports the PCell. Some or all SCells may be collocated with the PCell and supported by the MN. All cells supported by the MN are referred to as a master cell group (MCG) .
[0015] When the UE is in dual connectivity mode and is configured with SCells that are supported by other base stations or are non-collocated with the PCell, these other base stations are designated as secondary nodes (SN) . Each SN includes a primary SCell (PSCell) that may communicate control information for the SCells associated with the SN (e.g., a secondary cell group (SCG) ) . PCells and PSCells perform many similar control-related functions with respect to carrier aggregation and are referred to collectively as special cells or SPCells. In this disclosure, functions associated with a PCell may also be performed by a PSCell. For carrier aggregation, the UE may be configured by the network with multiple CCs. The different CCs may be selectively activated and de-activated for load balancing or link management purposes. FIG. 1 illustrates a UE 110 that is connected to a first base station 120 functioning as master node and supporting cells for CC0 (PCell) and CC1 (collocation SCell) and to a second base station 120 (1) functioning as secondary node (SN) and supporting a cell for CC2 (non-collocated SCell) . In a carrier aggregation scenario, the UE 110 will be communicating with the network on CC0 and, depending on operating conditions may also be communicating with the network on CC1 and / or CC2.Radio Resource Management Overview
[0016] Radio resource management (RRM) is performed by a wireless network to ensure channels, frequencies ranges, beams, and network infrastructure are used appropriately given the constraints of the overall system and capabilities of individual devices and changing needs or requirements of devices. An example of RRM may include switching beams or cells or activating / deactivating / changing SCGs or SCells for one or more UEs. Each cell in the network transmits RRM reference signals (RS) . The RRM reference signals include SSBs, which are transmitted on a physical broadcast channel (PBCH) . Once a radio link is established, channel state information reference signals (CSI-RS) may be used for radio link monitoring (RLM) purposes. CSI-RS are transmitted in separately allocated resources.
[0017] To facilitate radio resource management, when a RAN node configures a UE with CCs, the RAN node also configures a measurement objective for each CC. As used herein a measurement objective (MO) may refer generally to periodic or on-demand time and frequency resources during which the UE is configured to measure RRM and / or RLM reference signals transmitted on the CC. For brevity, RRM-RS may be used herein to refer collectively to measurement objects related to SSBs or measurement objects related to CSI-RS, or any other reference signals used for RRM or RLM purposes. Examples of measurement objectives include SSB based measurement timing configurations (SMTCs) , radio link monitoring sets, measurement gaps, and so on. It is noted that the UE may be configured to measure RRM-RS for the same CC from neighboring cells as well the serving cell for the CC during measurement occasion.
[0018] A configured CC may be within a same frequency band as a serving cell for the UE in which case the RRM measurement made by the UE is an intra-frequency measurement. With intra-frequency measurements, the RF chain of the UE may not need to be tuned to receive the RRM-RS, in which case the RRM measurement process does not interrupt normal operation of the UE (e.g., the sending / receiving of data from the serving cell (s) ) .
[0019] When a CC is not within the same frequency band as a serving cell for the UE, the RRM measurement is an inter-frequency measurement. For an inter-frequency measurement the UE will need to tune its RF chain to receive the RRM-RS and then re-tune the RF chain to the frequency layer of the serving cell (s) to resume communication. The UE is unable to send or receive signals from the serving cell (s) during the period in which the UE is not tuned to the frequency layer of the serving cell (s) . When a UE is to make measurements of RRM-RS that will require tuning, the network configures the UE with one or more measurement gaps during which the UE is to receive and measure these RRM-RS and the network does not schedule transmissions to the UE nor does the UE transmit signals to the serving cell (s) .
[0020] A UE measures RRM-RS from active serving cells and selected neighboring cells during the measurement objectives configured by the network. The UE reports the measurements to the network (e.g., by way of measurement reports sent to a serving cell) . At any given time, a UE may be configured for potential connection to multiple cells, each one associated with a different component carrier (CC) . If the UE had unlimited searching resources (e.g., receive chains, memory, and so on) the UE would measure RRM-RS from the multiple cells in all of the configured measurement objectives. However, a UE configured for carrier aggregation may not have sufficient searching resources to measure all configured RRM-RS in each measurement objective.
[0021] Referring to FIG. 2, for each CC to be measured for RRM / RLM purposes by the UE, the network configures periodic measurement objectives. Each measurement objective may be defined by a period, an offset, and duration of time during which a UE measures RRM-RS on the CC. A measurement objective may be an SMTC that is configured as part of an RRC Connection Reconfiguration message and configured in a measTimingConfig-r15 field of a MeasObjectNR IE which specifies details for measuring a specific CC. In the example of FIG. 2, the UE is configured with measurement objectives 210 for CC0, 220 for CC1, 230 for CC2, 240 for CC3, and 250 for CC4, and 260 for CC5. CC0 is the primary cell for the UE while the other CCs may be associated with SCells or a different radio access technology (RAT) . The other CCs may be in the same band as CC0, in a different band, or even in different frequency range (e.g., FR1 vs. FR2) .
[0022] In FIG. 2 it can be seen that the measurement objectives have different periods, lengths, and offsets. CC0 has the shortest measurement objective period (e.g., 5 ms) , while CC1and CC2 have longer periods (e.g., 10 ms and 20 ms, respectively. The measurement objectives for CC3 and CC4 are offset by 5 ms and 10 ms, respectively. The measurement objectives for CC5 are in complete alignment with the measurement objectives for CC0.
[0023] While the UE may be configured with many different CCs, at any given time only the primary cell CC0 must be actively connected to the UE and the other CCs may or may not be actively connected to the UE. However, for RRM / RLM purposes, the UE should measure RRM-RS for all configured CCs, even CCs that are not activated. It can be seen in FIG. 2 that the measurement objectives for CC1-CC5 all overlap with measurement objectives for CC0. Thus if the UE is only capable of measuring RRM-RS from a single carrier in each measurement objective, the UE would have to select, in any given measurement objective, one of the CCs for measurement. For example, in the first measurement objective, the UE will need to monitor either CC0, CC1, CC2, or CC5.
[0024] As the number of carriers that a UE supports for carrier aggregation increases the UE may be configured with more CCs, making collisions between measurement objectives more likely. To mitigate this issue, the UE may be configured to measure a representative CC in a band and use the measurement result for other CCs in the band. Thus, if CC1 is in the same band as CC0, the UE may need only measure CC0 and provide the same result for CC0 and CC1.
[0025] In some examples, the UE has resources (e.g., additional receive chains) for simultaneously measuring RRM-RS on a additional CC. Each set of resources for measuring RRM-RS is referred to herein as a “searcher. ” Many UEs support two searchers and some examples herein will be provided in the context of two searchers. However, the described techniques may be equally applicable to UEs having any number of searchers.Carrier Specific Scaling Factor Overview
[0026] A carrier specific scaling factor (CSSF) may be defined that gives a probability with which a given searcher measures RRM-RS in overlapping measurement objectives. For these purposes, each the configured CCs may be categorized based on one or more of the following characteristics: PCC (primary CC) , SCC (secondary CC) with or without neighbor cell measurement, FR1, FR2, requiring a measurement gap (being inter-band with respect to PCC) , not requiring a measurement gap (being intra-band with respect to the PCC) , and inter-RAT. The CSSF may assign probabilities or selection rates to each CC based on a first allocation of the searcher that divides the searcher into portions and a second allocation of each portion. It is noted that a different CCSF may be applied to a CC based on the number of CCs that have overlapping measurement objectives. As such, certain CCs may be subject to different CCSFs depending on the timing of the measurement objective. For example, in the third measurement objective of FIG. 2 the CC1 measurement objective overlaps with the measurement objectives for CC0, CC4, and CC5 while in the fifth measurement objective the CC1 measurement objective overlaps with CC0, CC2, and CC5. Thus, CC3 may be subject to different CCSF in the second measurement objective as compared to the fourth measurement objective because its measurement objectives overlap with measurement objectives of different sets of CCs.
[0027] When a UE supports two searchers, the CCSF for the PCC may be set to 1 or 100%, giving a dedicated searcher for the PCC. The second searcher is allocated to the remaining configured CCs by setting a CCSF for each CC. The second searcher may be first allocated into two portions (50%each) and one of the portions is to be shared equally between n configured SCCs, the CSSF for each of the SCCs with neighbor cell measurement will be set based on 1 / 2 *1 / n. Thus, if there are 4 configured SCC with neighbor cell measurement, the CSSF for each of the SCCs is 1 / 8. This means that, on average and over time, each of the SCCs with neighbor cell measurement is selected for measurement once in every 8 measurement objectives. When there are 8 configured SCCs with neighbor cell measurement the CSSF rate falls to 1 / 16. The other 50%of the searcher may be allocated to other CC types according to different rates as well.
[0028] In some examples, the CSSF is determined based on tables that prescribe CSSFs for different numbers and combinations of CC types (e.g., PCC, SCC, and so on as listed above) . However, this static approach may not make the best use of searcher resources in all scenarios.
[0029] In addition to CSSF, a more general term -search occupancy ratio is used herein. A searcher occupancy ratio may be related to a CSSF or any other mechanism that can be used to assign a probability or rate of measurement to CCs with overlapping measurement objectives. In general the higher the searcher occupancy ratio that is assigned to a given CC, the higher the rate or probability that RRM-RS in the CC are measured in a measurement objective.
[0030] Described herein are systems, methods, and circuitries that provide techniques for determining a searcher occupancy ratio based on additional or alternative criteria as compared to assigning the searcher occupancy ratio based solely on CC types as described above for CCSF. In this manner, searcher resources may be better utilized in different operating scenarios. For example, the searcher ratio may be determined based on quality of service (QoS) requirements for traffic carried by a CC, a DRX status of the CC, a timing advance group reference cell status of the CC, a frequency relationship (e.g., intra-band and inter-band) between the CC and the PCC, and so on.
[0031] FIG. 3 is a message flow diagram outlining an example RRM-RS measurement process in a carrier aggregation scenario. At 330, the UE and the PCell or PSCell (SPCell) have a common understanding of searcher occupancy ratio criteria that are to be used to allocate searcher resources amongst CCs that have overlapping measurement objectives. When a measurement objective occurs, at 350 the UE allocates searcher resources according to the criteria. For example the UE selects a first CC for measurement by its first searcher and a second CC for measurement by its second searcher based on the searcher occupancy ratio criteria.
[0032] The PSCell and other cells associated with the configured carriers transmit RRM-RS 370 and at 380 the UE measures RRM-RS carried by the first carrier and the second carrier selected at 350. The UE provides a measurement report 390 to the SPCell for use in RRM and / or RLM.
[0033] The following description outlines different prioritization criteria for assigning search occupancy ratios.Quality of Service Based Searcher Allocation Ratio
[0034] In a wireless network, data is carried on traffic bearers, which are logical channels that are used to carry different types of data. For example, voice data may be carried by a first traffic bearer while navigational data is carried by a second bearer. Each traffic bearer is assigned, by the network, with a quality of service (QoS) class identifier (QCI) . The QCI is a numerical value with QCI 1 having a highest priority and QCI 9 having a lowest priority. For example, traffic bearer carrying voice data may be assigned a higher priority (alow QCI value) while a traffic bearer carrying a bulk data transfer may be assigned a lower priority (ahigh QCI) . It is noted that a CC may carry more than one traffic bearer and the traffic bearers may have different QCIs.
[0035] A searcher occupancy ratio for a CC may be determined based, at least in part, on a QCI or QoS associated with the traffic bearers carried by the CC. If the CC carriers multiple traffic bearers having different QCIs, the CC may be characterized by the highest priority QCI amongst the multiple traffic bearers or an average QCI or other collective characterization of QCIs or QoS of the multiple traffic bearers. In general, the higher priority CCs may be assigned a higher searcher occupancy ratio than other CCs of the same type that have lower priority. For example a certain portion of a searcher may be allocated for measuring the highest priority SCC while another portion of the searcher may be allocated for sharing amongst remaining lower priority SCCs. When an SCC carries a high priority traffic bearer, a portion of the first searcher (that might otherwise have been dedicated to measuring the PCC) may be allocated to measuring the high priority SCC. Different criteria may be used to determine what QCI qualifies as “highest priority” SCC.
[0036] In one particular example, 100%of a first searcher is allocated to the PCC and 50%of the second searcher is allocated to the highest priority SCC, 25%of the second searcher is allocated to SCCs in FR2 with neighboring cell measurement and the other 25%of the second searcher may be allocated to all other CCs. In this and the following examples, the specific searcher occupancy ratio assigned to each CC in a given portion of the searcher may based on an equal ratio (e.g., split evenly amongst the CCs) or may be based on a prioritization amongst the CCs (e.g., based on a relative priority of the SCCs, a frequency relationship between the CCs, and / or other factor) .
[0037] In another particular example, 50%of a first searcher is allocated to the PCC and 50%of the first searcher is allocated to the highest priority SCC, 50%of the second searcher is allocated to SCCs in FR2 with neighboring cell measurement and the other 50%of the second searcher may be allocated to all other CCs.DRX Based Searcher Occupancy Ratios
[0038] Discontinuous reception (DRX) is a power-saving mechanism in which hardware associated with a given CC (e.g., receive chain) is powered down during configured inactive periods in which the network does not schedule transmissions on the CC. The hardware is powered on according to a configured DRX cycle to monitor for a transmission and also to measure RRM-RS on the CC. The UE skips configured measurement objectives that fall outside its configured DRX cycle. In general, the network assigns a shorter DRX cycle for CCs that carry a higher priority traffic bearer.
[0039] The DRX cycle for an SCC may be considered when assigning the searcher occupancy ratio. In one technique, SCCs without DRX are allocated a higher searcher occupancy ratio. This technique is based on the idea that SCCs without DRX are likely to be associated with a higher traffic load or need to monitor control channels and thus have more need to perform measurements in a timely manner (e.g., more often) .
[0040] Alternatively, SCCs without DRX may be allocated a lower searcher occupancy ratio. This technique is based on the idea that SCCs without DRX have more measurement objectives in the time domain as compared to SCCs that only have measurement objectives that align with the DRX cycle. For example, a first SCC without DRX has a measurement objective every 40 ms while a second SCC has a DRX cycle 320 ms long. In this case, within a given time window (e.g., 1280 ms) the first SCC will have eight times as many measurement objectives (32 MOs) as the second SCC (8 MOs) . Thus, when measurement objectives for the first SCC and the second SCC overlap, the second SCC, which has had fewer measurement objectives, should have a higher searcher occupancy ratio.Timing Advance Group Reference Cell Based Searcher Occupancy Ratios
[0041] CCs in the same timing advance group (TAG) may be assigned searcher occupancy ratios based on their roll within the TAG. A TAG represents a collection of CCs that share the same uplink timing advance and the same downlink timing reference cell (reference cell) . The TAG that includes the PCell is called pTAG while the TAGs that do not include the PCell are called sTAGs. The UE will use the PCell as the reference cell for pTAG and any activated SCell as the reference cell for an sTAG. CCs in the same TAG may serve locations that are equidistant from the transmission / reception point (TRP) of the CCs (or experience a similar delay due to channel conditions) . A UE may be configured with SCCs in different TAGs so that as the UE moves, SCCs in the different TAGs may be activated / deactivated to provide acceptable radio links.
[0042] A cell’s status within the TAG may be considered when assigning a searcher occupancy ratio to the associated CC. For example, within each TAG, a reference cell CC may be assigned a higher searcher occupancy ratio than other CCs in the TAG. For the pTAG, the PCell is deemed to be the reference cell by the UE and thus, assigning a high searcher occupancy ratio (e.g., a ratio of 1 for one of two searchers) to the reference cell will likely result in good performance.
[0043] For the SCells, the reference cell of an sTAG may be allocated 50%of a second searcher with other SCCs sharing the remaining 50%of the second searcher. Recall that the UE selects an activated SCell as the reference cell. If the CC for the reference SCell in sTAG is configured for RRM measurements that do not include measurements of neighboring cell RRM-RS, then link performance may be degraded if this CC without neighbor cell measurement is measured based on a relatively high searcher occupancy ratio. Thus, in cases when an SCC without neighbor cell measurement is designated as the reference cell for sTAG, the UE may change the reference cell to an SCC with neighbor cell measurement. This will cause the SCC with neighbor cell measurement to assigned a searcher occupancy ratio of 50%for the second searcher.Frequency Relationship Based Searcher Occupancy Ratios
[0044] When allocating searcher resources amongst SCCs, the frequency band and / or frequency relationship (with respect to a SPCell) may be considered as follows. SCCs in FR1 may be assigned a higher searcher occupancy ratio than SCCs in FR2. SCCs in FR2 may be assigned a higher searcher occupancy ratio than SCCs in FR1. SCCs that are inter-band with respect to their SPCell may be assigned a higher searcher occupancy ratio than SCCs that are intra-band with respect to their SPCell or vice versa. SCCs in different bands may be assigned searcher occupancy ratios based on their band. For example, SCCs in lower bands may be assigned a higher searcher occupancy ratio than SCCs in medium bands or high bands. SCCs that do not require a measurement gap may be assigned a higher searcher occupancy ratio than SCCs that require a measurement gap or vice versa. Intra-frequency SCC that do not require measurement gap may be assigned a higher searcher occupancy ratio than inter-frequency SCC that do not require a measurement gap. Certain inter-frequency SCCs that do not require measurement gap may be assigned a higher searcher occupancy ratio than intra-frequency SCC that do not require a measurement gap for mobility purposes.
[0045] Returning to FIG. 3, recall that at 330 the network (e.g., SPCell) and the UE have a common understanding of the criteria that are used to allocate searcher resources. The searcher occupancy ratio criteria may be set by standard so that no signaling is needed to select from amongst the searcher occupancy ration criteria options discussed above.
[0046] FIG. 4A is a message flow diagram outlining a searcher occupancy ratio configuration process in which the UE selects criteria for prioritizing CCs. The UE transmits a message or information 410 that indicates criteria that are to be used to assign searcher occupancy ratios to CCs. For example, the message 410 may indicate that a particular QoS based prioritization or a particular DRX based prioritization as discussed above will be used. The message may additionally or alternatively indicate whether the UE will use a TAG reference cell based prioritization (with or without reference cell re-assignment for SCell without neighbor cell measurement as disclosed above) and / or a frequency or frequency relationship based prioritization of SCCs. At 430, the UE and the SPCell have the same understanding of the searcher occupancy ratio criteria.
[0047] When a measurement objective occurs, the UE operates as outlined in FIG. 3 and allocates searcher resources, measures RRM-RS based on the searcher occupancy ratio, and transmits the measurement report.
[0048] FIG. 4B is a message flow diagram outlining a searcher occupancy ratio configuration process in which the network selects criteria for prioritizing CCs. The PCell transmits a message or information 410’ that indicates criteria that are to be used to assign searcher occupancy ratios to CCs. For example, the message 510 may indicate that a particular QoS based prioritization or a particular DRX based prioritization as discussed above will be used. The message may additionally or alternatively indicate whether the UE will use a TAG reference cell based prioritization (with or without reference cell re-assignment for SCell without neighbor cell measurement as disclosed above) and / or a frequency or frequency relationship based prioritization of SCCs.
[0049] At 430, the UE and the SPCell have the same understanding of the searcher occupancy ratio criteria. When a measurement objective occurs, the UE operates as outlined in FIG. 3 and allocates searcher resources, measures RRM-RS based on the searcher occupancy ratio, and transmits the measurement report.
[0050] FIG. 5A is a flow diagram outlining an example method 500 for measuring CCs according to a searcher occupancy ratio. The method 500 may be performed by a UE as illustrated in FIG. 1, FIGs 3-4B, and / or FIG. 7. The method includes, at 510, receiving configuration of a plurality of component carriers and respective measurement objectives. The configuration may be associated with operation that includes carrier aggregation. At 520, in each measurement objective, a component carrier of the plurality of component carriers is selected for measuring reference signals based on respective searcher occupancy ratios assigned to respective carriers of the plurality of component carriers. The searcher occupancy ratio assigned to a component carrier is a function of a quality-of-service (QoS) assigned to traffic bearers carried by the component carrier or a discontinuous receive (DRX) cycle of the component carrier.
[0051] In some examples, a higher searcher occupancy ratio is assigned to secondary cell CCs (SCCs) configured for neighbor cell measurement as compared to SCCs not configured for neighbor cell measurement.
[0052] In some examples, according to the method 500 a higher searcher occupancy ratio is assigned to SCCs carrying traffic bearers having a higher QoS. For example, for a first searcher resource, a primary cell component carrier (PCC) may be assigned a searcher occupancy ratio of 100%; and for a second searcher resource, an SCC carrying traffic bearers having a highest QoS may be assigned a searcher occupancy ratio of 50%. The remaining SCCs in frequency range 2 (FR2) configured for neighbor cell measurement are assigned searcher occupancy ratios that, combined, result in a 25%searcher occupancy ratio and remaining SCCs may be assigned searcher occupancy ratios that, combined, result in a 25%searcher occupancy ratio.
[0053] Alternatively, according to the method 500, for a first searcher resource, an SCC carrying traffic bearers having a highest QoS C may be assigned a searcher occupancy ratio of 50%and a PCC may be assigned a searcher occupancy ratio of 50%. For a second searcher resource, SCCs in frequency range 2 (FR2) configured for neighbor cell measurement may be assigned searcher occupancy ratios that, combined, result in a 50%searcher occupancy ratio and remaining SCCs may be assigned searcher occupancy ratios that, combined, result in a 50%searcher occupancy ratio.
[0054] In some examples, according to the method 500 a higher searcher occupancy ratio may be assigned to SCCs configured for DRX as compared to CCs not configured for DRX. Alternatively, a higher searcher occupancy ratio may be assigned to SCCs not configured for DRX as compared to CCs configured for DRX.
[0055] In some examples, according to the method 500, a higher searcher occupancy ratio may be assigned to an SCC associated with a reference cell (reference SCC) of a secondary timing advance group (sTAG) than other CCs in the TAG. When the reference SCC of the secondary TAG is not configured for neighbor cell measurement, the method may include designating an SCC of the secondary TAG that is configured for neighbor cell measurement as the reference cell for the secondary TAG.
[0056] In one example, according to the method 500 for a first searcher resource, a primary cell component carrier (PCC) is assigned a searcher occupancy ratio of 100%and for a second searcher resource, a reference SCC of a secondary TAG is assigned a searcher occupancy ratio of 50% and remaining SCCs are assigned searcher occupancy ratios that, combined, result in a 50%searcher occupancy ratio.
[0057] In some examples, according to the method 500 the searcher occupancy ratio for an SCC is based on a frequency or frequency relationship of the SCC to a special cell (SPCell) . For example, the searcher occupancy ratio may be assigned based on a frequency band or frequency range of the SCC. Alternatively or additionally, a higher searcher occupancy ratio may be assigned to SCCs that are inter-band with respect to the SPCell as compared to SCCs that are intra-band with respect to the SPCell. Alternatively or additionally, a higher searcher occupancy ratio is assigned to SCCs that are intra-band with respect to the SPCell and are configured with a measurement gap as compared to SCCs that are inter-band with respect to the SPCell and are configured with a measurement gap.
[0058] Alternatively or additionally a higher searcher occupancy ratio may be assigned to preconfigured SCCs that are inter-band with respect to the SPCell and are configured with a measurement gap as compared to SCCs that are intra-band with respect to the SPCell and are configured with a measurement gap.
[0059] In some examples, the method 500 includes transmitting information indicating criteria used to determine the searcher occupancy ratio for the plurality of carriers. In some examples, the method 500 includes receiving information indicating criteria used to determine the searcher occupancy ratio for the plurality of carriers.
[0060] FIG. 5B is a flow diagram outlining an example method 550 for measuring CCs according to a searcher occupancy ratio. The method 500 may be performed by a base station or SPCell as illustrated in FIG. 1, FIGs 3-4B, and / or FIG. 7. The method includes, at 560, transmitting indication of searcher occupancy criteria for use in determining a searcher occupancy ratio, wherein the searcher occupancy ratio defines a rate or likelihood of selecting a component carrier of a plurality of component carriers for measuring reference signals during a measurement objective, wherein the searcher occupancy ratio assigned to a component carrier is a function of a quality-of-service (QoS) assigned to traffic bearers carried by the component carrier or a discontinuous receive (DRX) cycle of the component carrier.
[0061] In some examples, a higher searcher occupancy ratio is assigned to secondary cell CCs (SCCs) configured for neighbor cell measurement as compared to SCCs not configured for neighbor cell measurement.
[0062] In some examples, according to the method 550 a higher searcher occupancy ratio is assigned to SCCs carrying traffic bearers having a higher QoS. For example, for a first searcher resource, a primary cell component carrier (PCC) may be assigned a searcher occupancy ratio of 100%; and for a second searcher resource, an SCC carrying traffic bearers having a highest QoS may be assigned a searcher occupancy ratio of 50%. The remaining SCCs in frequency range 2 (FR2) configured for neighbor cell measurement are assigned searcher occupancy ratios that, combined, result in a 25%searcher occupancy ratio and remaining SCCs may be assigned searcher occupancy ratios that, combined, result in a 25%searcher occupancy ratio.
[0063] Alternatively, according to the method 550 for a first searcher resource, an SCC carrying traffic bearers having a highest QoS C may be assigned a searcher occupancy ratio of 50%and a PCC may be assigned a searcher occupancy ratio of 50%. For a second searcher resource, SCCs in frequency range 2 (FR2) configured for neighbor cell measurement may be assigned searcher occupancy ratios that, combined, result in a 50%searcher occupancy ratio; and remaining SCCs may be assigned searcher occupancy ratios that, combined, result in a 50%searcher occupancy ratio.
[0064] In some examples, according to the method 550 a higher searcher occupancy ratio may be assigned to SCCs configured for DRX as compared to CCs not configured for DRX. Alternatively, a higher searcher occupancy ratio may be assigned to SCCs not configured for DRX as compared to CCs configured for DRX.
[0065] In some examples, according to the method 550, a higher searcher occupancy ratio may be assigned to an SCC associated with a reference cell (reference SCC) of a secondary timing advance group (sTAG) than other CCs in the TAG. When the reference SCC of the secondary TAG is not configured for neighbor cell measurement, the method may include designating an SCC of the secondary TAG that is configured for neighbor cell measurement as the reference cell for the secondary TAG.
[0066] In one example, according to the method 550 for a first searcher resource, a primary cell component carrier (PCC) is assigned a searcher occupancy ratio of 100%and for a second searcher resource, a reference SCC of a secondary TAG is assigned a searcher occupancy ratio of 50% and remaining SCCs are assigned searcher occupancy ratios that, combined, result in a 50%searcher occupancy ratio.
[0067] In some examples, according to the method 550 the searcher occupancy ratio for an SCC is based on a frequency or frequency relationship of the SCC to a special cell (SPCell) . For example, the searcher occupancy ratio may be assigned based on a frequency band or frequency range of the SCC. Alternatively or additionally, a higher searcher occupancy ratio may be assigned to SCCs that are inter-band with respect to the SPCell as compared to SCCs that are intra-band with respect to the SPCell. Alternatively or additionally, a higher searcher occupancy ratio is assigned to SCCs that are intra-band with respect to the SPCell and are configured with a measurement gap as compared to SCCs that are inter-band with respect to the SPCell and are configured with a measurement gap.
[0068] Alternatively or additionally a higher searcher occupancy ratio may be assigned to preconfigured SCCs that are inter-band with respect to the SPCell and are configured with a measurement gap as compared to SCCs that are intra-band with respect to the SPCell and are configured with a measurement gap.
[0069] The method includes, at 570, receiving measurement reports based on the searcher occupancy ratio.Wireless Network
[0070] FIG. 6 illustrates an example wireless network. The systems and devices of example network 100 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 100 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.
[0071] As shown, UEs 610 may include smartphones (e.g., handheld touchscreen mobile computing devices connectable to one or more wireless communication networks) . Additionally, or alternatively, UEs 610 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, etc. In some implementations, UEs 610 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.
[0072] 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 622 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 622 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 other like having smaller coverage areas, smaller user capacity, or higher bandwidth compared to macrocells.
[0073] Some or all of RAN nodes 622 may be implemented as one or more software entities running on server computers as part of a virtual network, which may be referred to as a centralized RAN (CRAN) and / or a virtual baseband unit pool (vBBUP) . In these implementations, the CRAN or vBBUP may implement a RAN function split, such as a packet data convergence protocol (PDCP) split wherein RRC and PDCP layers may be operated by the CRAN / vBBUP and other Layer 2 (L2) protocol entities may be operated by individual RAN nodes 622; a media access control (MAC) / physical (PHY) layer split wherein RRC, PDCP, radio link control (RLC) , and MAC layers may be operated by the CRAN / vBBUP and the PHY layer may be operated by individual RAN nodes 622; or a “lower PHY” split wherein RRC, PDCP, RLC, MAC layers and upper portions of the PHY layer may be operated by the CRAN / vBBUP and lower portions of the PHY layer may be operated by individual RAN nodes 622. This virtualized framework may allow freed-up processor cores of RAN nodes 622 to perform or execute other virtualized applications.
[0074] In some implementations, an individual RAN node 622 may represent individual gNB-distributed units (DUs) connected to a gNB-control unit (CU) via individual F1 interfaces. In such implementations, the gNB-DUs may include one or more remote radio heads or radio frequency (RF) front end modules (RFEMs) , and the gNB-CU may be operated by a server (not shown) located in RAN 620 or by a server pool (e.g., a group of servers configured to share resources) in a similar manner as the CRAN / vBBUP. Additionally, or alternatively, one or more of RAN nodes 622 may be next generation eNBs (i.e., gNBs) that may provide evolved universal terrestrial radio access (E-UTRA) user plane and control plane protocol terminations toward UEs 610, and that may be connected to a 5G core network (5GC) 630 via an NG interface.
[0075] Any of the RAN nodes 622 may terminate an air interface protocol and may be the first point of contact for UEs 610. In some implementations, any of the RAN nodes 622 may fulfill various logical functions for the RAN 620 including, but not limited to, radio network controller (RNC) functions such as radio bearer management, uplink and downlink dynamic radio resource management and data packet scheduling, and mobility management. UEs 610 may be configured to communicate using orthogonal frequency-division multiplexing (OFDM) communication signals with each other or with any of the RAN nodes 622 over a multicarrier communication channel in accordance with various communication techniques, such as, but not limited to, an OFDMA communication technique (e.g., for downlink communications) or a single carrier frequency-division multiple access (SC-FDMA) communication technique (e.g., for uplink and ProSe or sidelink (SL) communications) , although the scope of such implementations may not be limited in this regard. The OFDM signals may comprise a plurality of orthogonal subcarriers.
[0076] In some implementations, a downlink resource grid may be used for downlink transmissions from any of the RAN nodes 622 to UEs 610, 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.
[0077] The RAN nodes 622 may be configured to communicate with one another via interface 623. In implementations where the system is an LTE system, interface 623 may be an X2 interface. The X2 interface may be defined between two or more RAN nodes 622 (e.g., two or more eNBs / gNBs or a combination thereof) that connect to evolved packet core (EPC) or CN 630, or between two eNBs connecting to an EPC. In some implementations, the X2 interface may include an X2 user plane interface (X2-U) and an X2 control plane interface (X2-C) . The X2-U may provide flow control mechanisms for user data packets transferred over the X2 interface and may be used to communicate information about the delivery of user data between eNBs or gNBs. For example, the X2-U may provide specific sequence number information for user data transferred from a master eNB (MeNB) to a secondary eNB (SeNB) ; information about successful in sequence delivery of PDCP packet data units (PDUs) to a UE 610 from an SeNB for user data; information of PDCP PDUs that were not delivered to a UE 610; information about a current minimum desired buffer size at the SeNB for transmitting to the UE user data; and the like. The X2-C may provide intra-LTE access mobility functionality (e.g., including context transfers from source to target eNBs, user plane transport control, etc. ) , load management functionality, and inter-cell interference coordination functionality.
[0078] As shown, RAN 620 may be connected (e.g., communicatively coupled) to CN 630. CN 630 may comprise a plurality of network elements 632, which are configured to offer various data and telecommunications services to customers / subscribers (e.g., users of UEs 610) who are connected to the CN 630 via the RAN 620. In some implementations, CN 630 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 630 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) . In some implementations, network function virtualization (NFV) may be utilized to virtualize any or all the above-described network node roles or functions via executable instructions stored in one or more computer-readable storage mediums (described in further detail below) . A logical instantiation of the CN 630 may be referred to as a network slice, and a logical instantiation of a portion of the CN 630 may be referred to as a network sub-slice. Network Function Virtualization (NFV) architectures and infrastructures may be used to virtualize one or more network functions, alternatively performed by proprietary hardware, onto physical resources comprising a combination of industry-standard server hardware, storage hardware, or switches. In other words, NFV systems may be used to execute virtual or reconfigurable implementations of one or more EPC components / functions.
[0079] As shown, CN 630, application servers 640, and external networks 650 may be connected to one another via interfaces 634, 636, and 638, which may include IP network interfaces. Application servers 640 may include one or more server devices or network elements (e.g., virtual network functions (VNFs) offering applications that use IP bearer resources with CN 630 (e.g., universal mobile telecommunications system packet services (UMTS PS) domain, LTE PS data services, etc. ) . Application servers 640 may also, or alternatively, be configured to support one or more communication services (e.g., voice over IP (VoIP sessions, push-to-talk (PTT) sessions, group communication sessions, social networking services, etc. ) for UEs 610 via the CN 630. Similarly, external networks 650 may include one or more of a variety of networks, including the Internet, thereby providing the mobile communication network and UEs 610 of the network access to a variety of additional services, information, interconnectivity, and other network features.
[0080] UEs 610 may communicate and establish a connection with (e.g., be communicatively coupled) with RAN 620, which may involve one or more wireless channels 614-1 and 614-2, each of which may comprise a physical communications interface / layer. In some implementations, a UE may be configured with dual connectivity (DC) as a multi-radio access technology (multi-RAT) or multi-radio dual connectivity (MR-DC) , where a multiple receive and transmit (Rx / Tx) capable UE may use resources provided by different network nodes (e.g., 622-1 and 622-2) that may be connected via non-ideal backhaul (e.g., where one network node provides NR access and the other network node provides either E-UTRA for LTE or NR access for 5G) . In such a scenario, one network node may operate as a master node (MN) and the other as the secondary node (SN) . The MN and SN may be connected via a network interface, and at least the MN may be connected to the CN 630. Additionally, at least one of the MN or the SN may be operated with shared spectrum channel access, and functions specified for UE 610 can be used for an integrated access and backhaul mobile termination (IAB-MT) . Similar for UE 601, the IAB-MT may access the network using either one network node or using two different nodes with enhanced dual connectivity (EN-DC) architectures, new radio dual connectivity (NR-DC) architectures, or the like. In some implementations, a base station (as described herein) may be an example of network nod 622. The UE may measure reference signals transmitted on any of the above configured carriers based on a searcher allocation ratio as described above with reference to FIGs. 3-5B.
[0081] As shown, UE 610 may also, or alternatively, connect to access point (AP) 616 via connection interface 618, which may include an air interface enabling UE 610 to communicatively couple with AP 616. AP 616 may comprise a wireless local area network (WLAN) , WLAN node, WLAN termination point, etc. The connection 6207 may comprise a local wireless connection, such as a connection consistent with any IEEE 702.11 protocol, and AP 616 may comprise a wireless fidelity router or other AP. While not explicitly depicted in Fig. 6, AP 616 may be connected to another network (e.g., the Internet) without connecting to RAN 620 or CN 630. In some scenarios, UE 610, RAN 620, and AP 616 may be configured to utilize LTE-WLAN aggregation (LWA) techniques or LTE WLAN radio level integration with IPsec tunnel (LWIP) techniques. LWA may involve UE 610 in RRC_CONNECTED being configured by RAN 620 to utilize radio resources of LTE and WLAN. LWIP may involve UE 610 using WLAN radio resources (e.g., connection interface 618) via IPsec protocol tunneling to authenticate and encrypt packets (e.g., Internet Protocol (IP) packets) communicated via connection interface 618. IPsec tunneling may include encapsulating the entirety of original IP packets and adding a new packet header, thereby protecting the original header of the IP packets.Device
[0082] FIG. 7 is a diagram of an example of components of a device according to one or more implementations described herein. The components of the illustrated device 700 can be included in a UE or a RAN node that configures determines or applies a searcher occupancy ratio for a UE. In some implementations, the device 700 can include application circuitry 702, baseband circuitry 704, RF circuitry 706, front-end module (FEM) circuitry 708, one or more antennas 710, and power management circuitry (PMC) 712 coupled together at least as shown. In some implementations, the device 700 can include fewer elements (e.g., a RAN node may not utilize application circuitry 702, and instead include a processor / controller to process IP data received from a CN such as 5GC 630 or an Evolved Packet Core (EPC) ) . In some implementations, the device 700 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 700, 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) .
[0083] The application circuitry 702 can include one or more application processors. For example, the application circuitry 702 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 700. In some implementations, processors of application circuitry 702 can process IP data packets received from an EPC.
[0084] The baseband circuitry 704 can include circuitry such as, but not limited to, one or more single-core or multi-core processors. The baseband circuitry 704 can include one or more baseband processors or control logic to process baseband signals received (e.g., measurement gap configurations and reference signals from neighboring cells when the device is associated with a UE) from a receive signal path of the RF circuitry 706 and to generate baseband signals (e.g., measurement gap configurations for a UE when the device is associated with a RAN node) for a transmit signal path of the RF circuitry 706. Baseband circuity 704 can interface with the application circuitry 702 for generation and processing of the baseband signals and for controlling operations of the RF circuitry 706. For example, in some implementations, the baseband circuitry 704 can include a 3G baseband processor 704A, a 4G baseband processor 704B, a 5G baseband processor 704C, or other baseband processor (s) 704D for other existing generations, generations in development or to be developed in the future (e.g., 2G, 6G, etc. ) . The baseband circuitry 704 (e.g., one or more of baseband processors 704A-D) can handle various radio control functions that enable communication with one or more radio networks via the RF circuitry 706. In other implementations, some or all of the functionality of baseband processors 704A-D can be included in modules stored in the memory 704G and executed via a Central Processing Unit (CPU) 704E. The radio control functions can include, but are not limited to, signal modulation / demodulation, encoding / decoding, radio frequency shifting, etc.
[0085] In some implementations, the baseband circuitry 704 can include one or more audio digital signal processor (s) (DSP) 704F. The audio DSPs 704F can include elements for compression / decompression and echo cancellation and can include other suitable processing elements in other implementations. Components of the baseband circuitry can be suitably combined in a single chip, a single chipset, or disposed on a same circuit board in some implementations. In some implementations, some or all of the constituent components of the baseband circuitry 704 and the application circuitry 702 can be implemented together such as, for example, on a system on a chip (SOC) .
[0086] In some implementations, the baseband circuitry 704 can provide for communication compatible with one or more radio technologies. For example, in some implementations, the baseband circuitry 704 can support communication with a NG-RAN, an evolved universal terrestrial radio access network (EUTRAN) or other wireless metropolitan area networks (WMAN) , a wireless local area network (WLAN) , a wireless personal area network (WPAN) , etc. Implementations in which the baseband circuitry 704 is configured to support radio communications of more than one wireless protocol can be referred to as multi-mode baseband circuitry.
[0087] RF circuitry 706 can enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium. In various implementations, the RF circuitry 706 can include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network. RF circuitry 706 can include a receive signal path which can include circuitry to down-convert RF signals received from the FEM circuitry 708 and provide baseband signals to the baseband circuitry 704. RF circuitry 706 can also include a transmit signal path which can include circuitry to up-convert baseband signals provided by the baseband circuitry 704 and provide RF output signals to the FEM circuitry 708 for transmission.
[0088] In some implementations, the receive signal path of the RF circuitry 706 can include mixer circuitry 706A, amplifier circuitry 706B and filter circuitry 706C. In some implementations, the transmit signal path of the RF circuitry 706 can include filter circuitry 706C and mixer circuitry 706A. RF circuitry 706 can also include synthesizer circuitry 706D for synthesizing a frequency for use by the mixer circuitry 706A of the receive signal path and the transmit signal path. In some implementations, the mixer circuitry 706A of the receive signal path can be configured to down-convert RF signals received from the FEM circuitry 708 based on the synthesized frequency provided by synthesizer circuitry 706D. The amplifier circuitry 706B can be configured to amplify the down-converted signals and the filter circuitry 706C can be a low-pass filter (LPF) or band-pass filter (BPF) configured to remove unwanted signals from the down-converted signals to generate output baseband signals. Output baseband signals can be provided to the baseband circuitry 704 for further processing. In some implementations, the output baseband signals can be zero-frequency baseband signals, although this is not a requirement. In some implementations, mixer circuitry 706A of the receive signal path can comprise passive mixers, although the scope of the implementations is not limited in this respect.
[0089] In some implementations, the mixer circuitry 706A of the transmit signal path can be configured to up-convert input baseband signals based on the synthesized frequency provided by the synthesizer circuitry 706D to generate RF output signals for the FEM circuitry 708. The baseband signals can be provided by the baseband circuitry 704 and can be filtered by filter circuitry 706C.
[0090] In some implementations, the mixer circuitry 706A of the receive signal path and the mixer circuitry 706A of the transmit signal path can include two or more mixers and can be arranged for quadrature down conversion and up conversion, respectively. In some implementations, the mixer circuitry 706A of the receive signal path and the mixer circuitry 706A of the transmit signal path can include two or more mixers and can be arranged for image rejection (e.g., Hartley image rejection) . In some implementations, the mixer circuitry 706A of the receive signal path and the mixer circuitry`1406A can be arranged for direct down conversion and direct up conversion, respectively. In some implementations, the mixer circuitry 706A of the receive signal path and the mixer circuitry 706A of the transmit signal path can be configured for super-heterodyne operation.
[0091] In some implementations, the output baseband signals, and the input baseband signals can be analog baseband signals, although the scope of the implementations is not limited in this respect. In some alternate implementations, the output baseband signals, and the input baseband signals can be digital baseband signals. In these alternate implementations, the RF circuitry 706 can include analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuitry and the baseband circuitry 704 can include a digital baseband interface to communicate with the RF circuitry 706.
[0092] In some dual-mode implementations, a separate radio IC circuitry can be provided for processing signals for each spectrum, although the scope of the implementations is not limited in this respect.
[0093] In some implementations, frequency input can be provided by a voltage-controlled oscillator (VCO) , although that is not a requirement. Divider control input can be provided by either the baseband circuitry 704 or the applications circuitry 702 depending on the desired output frequency. In some implementations, a divider control input (e.g., N) can be determined from a look-up table based on a channel indicated by the applications circuitry 702.
[0094] FEM circuitry 708 can include a receive signal path which can include circuitry configured to operate on RF signals received from one or more antennas 710, amplify the received signals and provide the amplified versions of the received signals to the RF circuitry 706 for further processing. FEM circuitry 708 can also include a transmit signal path which can include circuitry configured to amplify signals for transmission provided by the RF circuitry 706 for transmission by one or more of the one or more antennas 710. In various implementations, the amplification through the transmit or receive signal paths can be done solely in the RF circuitry 706, solely in the FEM circuitry 708, or in both the RF circuitry 706 and the FEM circuitry 708.
[0095] While Fig. 7 shows the PMC 712 coupled only with the baseband circuitry 704. In other implementations, the PMC 712 may be additionally or alternatively coupled with, and perform similar power management operations for, other components such as, but not limited to, application circuitry 702, RF circuitry 706, or FEM circuitry 708.
[0096] In some implementations, the PMC 712 can control, or otherwise be part of, various power saving mechanisms of the device 700. For example, if the device 700 is in an RRC_Connected state, where it is still connected to the RAN node as it expects to receive traffic shortly, then it can enter a state known as Discontinuous Reception Mode (DRX) after a period of inactivity. During this state, the device 700 can power down for brief intervals of time and thus save power.
[0097] If there is no data traffic activity for an extended period of time, then the device 700 can transition off to an RRC_Idle state, where it disconnects from the network and does not perform operations such as channel quality feedback, handover, etc. The device 700 goes into a very low power state and it performs paging where again it periodically wakes up to listen to the network and then powers down again. The device 700 may not receive data in this state; in order to receive data, it can transition back to RRC_Connected state.
[0098] An additional power saving mode can allow a device to be unavailable to the network for periods longer than a paging interval (ranging from seconds to a few hours) . During this time, the device is totally unreachable to the network and can power down. Any data sent during this time incurs a large delay and it is assumed the delay is acceptable.
[0099] Processors of the application circuitry 702 and processors of the baseband circuitry 704 can be used to execute elements of one or more instances of a protocol stack. For example, processors of the baseband circuitry 704, alone or in combination, can be used execute Layer 3, Layer 2, or Layer 6 functionality, while processors of the baseband circuitry 704 can utilize data (e.g., packet data) received from these layers and further execute Layer 4 functionality (e.g., transmission communication protocol (TCP) and user datagram protocol (UDP) layers) . As referred to herein, Layer 3 can comprise a RRC layer, described in further detail below. As referred to herein, Layer 2 can comprise a medium access control (MAC) layer, a radio link control (RLC) layer, and a packet data convergence protocol (PDCP) layer, described in further detail below. As referred to herein, Layer 1 can comprise a physical (PHY) layer of a UE / RAN node, described in further detail below.
[0100] Above are several flow diagrams outlining example methods. 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.
[0101] 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.
[0102] As used herein, the term indicate is to be construed broadly as identifying an item, value, or quantity, to another communication device. For example, indicate may mean communicating a selection of one option among a set of options, or setting a flag or bit value in a field of a communicated signal (e.g., DCI, UCI) .Examples
[0103] 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 (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.
[0104] Example 1 is a baseband processor coupled to a memory and configured to, when executing instructions stored in the memory, perform operations including receiving configuration of a plurality of component carriers and respective measurement objectives; and in each measurement objective, selecting a component carrier of the plurality of component carriers for measuring reference signals based on respective searcher occupancy ratios assigned to respective carriers of the plurality of component carriers, wherein the searcher occupancy ratio assigned to a component carrier is a function of a quality-of-service (QoS) assigned to traffic bearers carried by the component carrier or a discontinuous receive (DRX) cycle of the component carrier.
[0105] Example 2 includes the subject matter of example 1, including or omitting optional elements, wherein a higher searcher occupancy ratio is assigned to secondary cell CCs (SCCs) configured for neighbor cell measurement as compared to SCCs not configured for neighbor cell measurement.
[0106] Example 3 includes the subject matter of example 1, including or omitting optional elements, wherein a higher searcher occupancy ratio is assigned to SCCs carrying traffic bearers having a higher QoS.
[0107] Example 4 includes the subject matter of example 1, including or omitting optional elements, wherein for a first searcher resource, a primary cell component carrier (PCC) is assigned a searcher occupancy ratio of 100%; and for a second searcher resource, an SCC carrying traffic bearers having a highest QoS is assigned a searcher occupancy ratio of 50%; and for remaining SCCs, SCCs in frequency range 2 (FR2) configured for neighbor cell measurement are assigned searcher occupancy ratios that, combined, result in a 25%searcher occupancy ratio; and remaining SCCs are assigned searcher occupancy ratios that, combined, result in a 25%searcher occupancy ratio.
[0108] Example 5 includes the subject matter of example 1, including or omitting optional elements, wherein for a first searcher resource, an SCC carrying traffic bearers having a highest QoS is assigned a searcher occupancy ratio of 50%; and a PCC is assigned a searcher occupancy ratio of 50%; and for a second searcher resource, SCCs in frequency range 2 (FR2) configured for neighbor cell measurement are assigned searcher occupancy ratios that, combined, result in a 50%searcher occupancy ratio; and remaining SCCs are assigned searcher occupancy ratios that, combined, result in a 50%searcher occupancy ratio.
[0109] Example 6 includes the subject matter of example 1, including or omitting optional elements, wherein a higher searcher occupancy ratio is assigned to SCCs configured for DRX as compared to CCs not configured for DRX.
[0110] Example 7 includes the subject matter of example 1, including or omitting optional elements, wherein a higher searcher occupancy ratio is assigned to SCCs not configured for DRX as compared to CCs configured for DRX.
[0111] Example 8 includes the subject matter of example 1, including or omitting optional elements, wherein a higher searcher occupancy ratio is assigned to an SCC associated with a reference cell (reference SCC) of a secondary timing advance group (sTAG) than other CCs in the TAG.
[0112] Example 9 includes the subject matter of example 8, including or omitting optional elements, wherein the operations include, when the reference SCC of the secondary TAG is not configured for neighbor cell measurement, designating an SCC of the secondary TAG that is configured for neighbor cell measurement as the reference cell for the secondary TAG.
[0113] Example 10 includes the subject matter of example 8, including or omitting optional elements, wherein for a first searcher resource, a primary cell component carrier (PCC) is assigned a searcher occupancy ratio of 100%; and for a second searcher resource, a reference SCC of a secondary TAG is assigned a searcher occupancy ratio of 50%; and remaining SCCs are assigned searcher occupancy ratios that, combined, result in a 50%searcher occupancy ratio.
[0114] Example 11 includes the subject matter of example 1, including or omitting optional elements, wherein the searcher occupancy ratio for an SCC is based on a frequency or frequency relationship of the SCC to a special cell (SPCell) .
[0115] Example 12 includes the subject matter of example 11, including or omitting optional elements, wherein a the searcher occupancy ratio is assigned based on a frequency band or frequency range of the SCC.
[0116] Example 13 includes the subject matter of example 11, including or omitting optional elements, wherein a higher searcher occupancy ratio is assigned to SCCs that are inter-band with respect to the SPCell as compared to SCCs that are intra-band with respect to the SPCell.
[0117] Example 14 includes the subject matter of example 11, including or omitting optional elements, wherein a higher searcher occupancy ratio is assigned to SCCs that are intra-band with respect to the SPCell and are configured with a measurement gap as compared to SCCs that are inter-band with respect to the SPCell and are configured with a measurement gap.
[0118] Example 15 includes the subject matter of example 11, including or omitting optional elements, wherein a higher searcher occupancy ratio is assigned to preconfigured SCCs that are inter-band with respect to the SPCell and are configured with a measurement gap as compared to SCCs that are intra-band with respect to the SPCell and are configured with a measurement gap.
[0119] Example 16 includes the subject matter of example 1, including or omitting optional elements, wherein the operations include transmitting information indicating criteria used to determine the searcher occupancy ratio for the plurality of carriers.
[0120] Example 17 includes the subject matter of example 1, including or omitting optional elements, wherein the operations include receiving information indicating criteria used to determine the searcher occupancy ratio for the plurality of carriers.
[0121] Example 18 is a processor coupled to a memory and configured to, when executing instructions stored in the memory, perform operations including transmitting indication of searcher occupancy criteria for use in determining a searcher occupancy ratio, wherein the searcher occupancy ratio defines a rate or likelihood of selecting a component carrier of a plurality of component carriers for measuring reference signals during a measurement objective, wherein the searcher occupancy ratio assigned to a component carrier is a function of a quality-of-service (QoS) assigned to traffic bearers carried by the component carrier or a discontinuous receive (DRX) cycle of the component carrier; and receiving measurement reports based on the searcher occupancy ratio.
[0122] Example 19 is a user equipment (UE) including radio frequency (RF) circuitry; memory; and baseband circuitry coupled to the memory. The baseband circuitry is configured to, when executing instructions stored in the memory, cause the UE to receive, by way of the RF circuitry, configuration of a plurality of component carriers and respective measurement objectives; and in each measurement objective, select a component carrier of the plurality of component carriers for measuring reference signals based on respective searcher occupancy ratios assigned to respective carriers of the plurality of component carriers, wherein the searcher occupancy ratio assigned to a component carrier is a function of a quality-of-service (QoS) assigned to traffic bearers carried by the component carrier or a discontinuous receive (DRX) cycle of the component carrier.
[0123] Example 20 includes the subject matter of example 19, including or omitting optional elements, wherein a higher searcher occupancy ratio is assigned to an SCC associated with a reference cell (reference SCC) of a secondary timing advance group (sTAG) than other CCs in the TAG; and when the reference SCC of the sTAG is not configured for neighbor cell measurement, the baseband processor is configured to cause the UE to designate an SCC of the secondary TAG that is configured for neighbor cell measurement as the reference cell for the secondary TAG.
[0124] Example 21 includes the subject matter of example 19, including or omitting optional elements, wherein the searcher occupancy ratio for an SCC is based on a frequency or frequency relationship of the SCC to a special cell (SPCell) .
[0125] Example 22 is a method for performing operations of the baseband processor of examples 1-17 or the processor of example 18.
[0126] Example 23 is non-transitory computer-readable medium having executable instructions stored thereon that, when executed, cause a processor to perform operations of the baseband processor of examples 1-17 or the processor of example 18.
[0127] Example 24 is an apparatus of a UE including the baseband processor of examples 1-17.
[0128] Example 25 is a RAN including a processor configured to perform operations of the processor of example 18.
[0129] 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.
[0130] In this regard, while the disclosed subject matter has been described in connection with various examples, implementations, aspects, etc., and corresponding Figures, where applicable, it is to be understood that other similar aspects can be used or modifications and additions can be made to the disclosed subject matter for performing the same, similar, alternative, or substitute function of the subject matter without deviating therefrom. Therefore, the disclosed subject matter should not be limited to any single example, implementation, or aspect described herein, but rather should be construed in breadth and scope in accordance with the appended claims below.
[0131] In particular regard to the various functions performed by the above described components or structures (assemblies, devices, circuits, systems, etc. ) , the terms (including a reference to a “means” ) used to describe such components are intended to correspond, unless otherwise indicated, to any component or structure which performs the specified function of the described component (e.g., that is functionally equivalent) , even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary implementations. In addition, while a particular feature may have been disclosed with respect to only one of several implementations, such feature may be combined with one or more other features of the other implementations as may be desired and advantageous for any given or particular application.
[0132] As used herein, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or” . That is, unless specified otherwise, or clear from context, “X employs A or B” is intended to mean any of the natural inclusive permutations. That is, if X employs A; X employs B; or X employs both A and B, then “X employs A or B” is satisfied under any of the foregoing instances. In addition, the articles “a” and “an” as used in this application and the appended claims should generally be construed to mean “one or more” unless specified otherwise or clear from context to be directed to a singular form. Furthermore, to the extent that the terms “including” , “includes” , “having” , “has” , “with” , or variants thereof are used in either the detailed description and the claims, such terms are intended to be inclusive in a manner similar to the term “comprising. ” Additionally, in situations wherein one or more numbered items are discussed (e.g., a “first X” , a “second X” , etc. ) , in general the one or more numbered items can be distinct, or they can be the same, although in some situations the context may indicate that they are distinct or that they are the same.
[0133] 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 coupled to a memory and configured to, when executing instructions stored in the memory, perform operations comprising:receiving configuration of a plurality of component carriers and respective measurement objectives; andin each measurement objective, selecting a component carrier of the plurality of component carriers for measuring reference signals based on respective searcher occupancy ratios assigned to respective carriers of the plurality of component carriers, wherein the searcher occupancy ratio assigned to a component carrier is a function of a quality-of-service (QoS) assigned to traffic bearers carried by the component carrier or a discontinuous receive (DRX) cycle of the component carrier.2.The baseband processor of claim 1, wherein a higher searcher occupancy ratio is assigned to secondary cell CCs (SCCs) configured for neighbor cell measurement as compared to SCCs not configured for neighbor cell measurement.3.The baseband processor of claim 1, wherein a higher searcher occupancy ratio is assigned to SCCs carrying traffic bearers having a higher QoS.4.The baseband processor of claim 1, whereinfor a first searcher resource, a primary cell component carrier (PCC) is assigned a searcher occupancy ratio of 100%; andfor a second searcher resource,an SCC carrying traffic bearers having a highest QoS is assigned a searcher occupancy ratio of 50%; andfor remaining SCCs,SCCs in frequency range 2 (FR2) configured for neighbor cell measurement are assigned searcher occupancy ratios that, combined, result in a 25%searcher occupancy ratio; andremaining SCCs are assigned searcher occupancy ratios that, combined, result in a 25%searcher occupancy ratio.5.The baseband processor of claim 1, whereinfor a first searcher resource,an SCC carrying traffic bearers having a highest QoS is assigned a searcher occupancy ratio of 50%; anda PCC is assigned a searcher occupancy ratio of 50%; andfor a second searcher resource,SCCs in frequency range 2 (FR2) configured for neighbor cell measurement are assigned searcher occupancy ratios that, combined, result in a 50%searcher occupancy ratio; andremaining SCCs are assigned searcher occupancy ratios that, combined, result in a 50%searcher occupancy ratio.6.The baseband processor of claim 1, wherein a higher searcher occupancy ratio is assigned to SCCs configured for DRX as compared to CCs not configured for DRX.7.The baseband processor of claim 1, wherein a higher searcher occupancy ratio is assigned to SCCs not configured for DRX as compared to CCs configured for DRX.8.The baseband processor of claim 1, wherein a higher searcher occupancy ratio is assigned to an SCC associated with a reference cell (reference SCC) of a secondary timing advance group (sTAG) than other CCs in the TAG.9.The baseband processor of claim 8, wherein the operations comprise, when the reference SCC of the secondary TAG is not configured for neighbor cell measurement,designating an SCC of the secondary TAG that is configured for neighbor cell measurement as the reference cell for the secondary TAG.10.The baseband processor of claim 8, wherein,for a first searcher resource, a primary cell component carrier (PCC) is assigned a searcher occupancy ratio of 100%; andfor a second searcher resource,a reference SCC of a secondary TAG is assigned a searcher occupancy ratio of 50%; andremaining SCCs are assigned searcher occupancy ratios that, combined, result in a 50%searcher occupancy ratio.11.The baseband processor of claim 1, wherein the searcher occupancy ratio for an SCC is based on a frequency or frequency relationship of the SCC to a special cell (SPCell) .12.The baseband processor of claim 11, wherein a the searcher occupancy ratio is assigned based on a frequency band or frequency range of the SCC.13.The baseband processor of claim 11, wherein a higher searcher occupancy ratio is assigned to SCCs that are inter-band with respect to the SPCell as compared to SCCs that are intra-band with respect to the SPCell.14.The baseband processor of claim 11, wherein a higher searcher occupancy ratio is assigned to SCCs that are intra-band with respect to the SPCell and are configured with a measurement gap as compared to SCCs that are inter-band with respect to the SPCell and are configured with a measurement gap.15.The baseband processor of claim 11, wherein a higher searcher occupancy ratio is assigned to preconfigured SCCs that are inter-band with respect to the SPCell and are configured with a measurement gap as compared to SCCs that are intra-band with respect to the SPCell and are configured with a measurement gap.16.The baseband processor of claim 1, wherein the operations comprise transmitting information indicating criteria used to determine the searcher occupancy ratio for the plurality of carriers.17.The baseband processor of claim 1, wherein the operations comprise receiving information indicating criteria used to determine the searcher occupancy ratio for the plurality of carriers.18.A processor coupled to a memory and configured to, when executing instructions stored in the memory, perform operations comprising:transmitting indication of searcher occupancy criteria for use in determining a searcher occupancy ratio, wherein the searcher occupancy ratio defines a rate or likelihood of selecting a component carrier of a plurality of component carriers for measuring reference signals during a measurement objective, wherein the searcher occupancy ratio assigned to a component carrier is a function of a quality-of-service (QoS) assigned to traffic bearers carried by the component carrier or a discontinuous receive (DRX) cycle of the component carrier; andreceiving measurement reports based on the searcher occupancy ratio.19.A user equipment (UE) comprising:radio frequency (RF) circuitry;memory; andbaseband circuitry coupled to the memory configured to, when executing instructions stored in the memory, cause the UE to:receive, by way of the RF circuitry, configuration of a plurality of component carriers and respective measurement objectives; andin each measurement objective, select a component carrier of the plurality of component carriers for measuring reference signals based on respective searcher occupancy ratios assigned to respective carriers of the plurality of component carriers, wherein the searcher occupancy ratio assigned to a component carrier is a function of a quality-of-service (QoS) assigned to traffic bearers carried by the component carrier or a discontinuous receive (DRX) cycle of the component carrier.20.The UE of claim 19, whereina higher searcher occupancy ratio is assigned to an SCC associated with a reference cell (reference SCC) of a secondary timing advance group (sTAG) than other CCs in the TAG; andwhen the reference SCC of the sTAG is not configured for neighbor cell measurement, the baseband circuitry is configured to cause the UE to designate an SCC of the secondary TAG that is configured for neighbor cell measurement as the reference cell for the secondary TAG.21.The UE of claim 19, wherein the searcher occupancy ratio for an SCC is based on a frequency or frequency relationship of the SCC to a special cell (SPCell) .