Search space monitoring with low-band ca switching
Patent Information
- Application Number
- PCT/CN2025/085461
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-10-01
Smart Images

Figure CN2025085461_01102026_PF_FP_ABST
Abstract
Description
Search Space Monitoring with Low-Band CA SwitchingTechnical Field
[0001] The present disclosure generally relates to wireless communication, and in particular, to search space monitoring with iow-band CA switching.Background
[0002] A user equipment (UE) may be equipped with multiple transmission (Tx) / reception (Rx) chains, each of which may be used for a carrier in a carrier aggregation (CA) scenario for transmit / receive operations. Equipping a UE with multiple Tx / Rx chains that correspond to a single carrier enables the UE to share the benefits of CA. However, iow-complexity UEs may not have multiple Tx / Rx chains. It may be useful to allow iow-complexity UEs to benefit from CA.Summary
[0003] Some example embodiments are related to an apparatus having memory coupled to processing circuitry, the processing circuitry configured to process, based on signaling from a network, a switching pattern configuration comprising a switching pattern including durations to tune a transmission / reception (Tx / Rx) chain to each of a first carrier and a second carrier, wherein the first carrier is configured for uplink (UL) and downlink (DL) operations and the second carrier is configured for DL operations only and process, based on signaling from the network, a monitoring configuration comprising occasions to monitor the first carrier for information transmitted by the network.
[0004] Other example embodiments are related to a method for processing, based on signaling from a network, a switching pattern configuration comprising a switching pattern including durations to tune a transmission / reception (Tx / Rx) chain to each of a first carrier and a second carrier, wherein the first carrier is configured for uplink (UL) and downlink (DL) operations and the second carrier is configured for DL operations only and process, based on signaling from the network, a monitoring configuration comprising occasions to monitor the first carrier for information transmitted by the network.Brief Description of the Drawings
[0005] Fig. 1 shows an example network arrangement according to various example embodiments.
[0006] Fig. 2 shows an example user equipment (UE) according to various example embodiments.
[0007] Fig. 3 shows an example base station according to various example embodiments.
[0008] Fig. 4 shows a first example of UE operations for handling overlapping resources configured by a switching pattern and a common search space (CSS) configuration according to various example embodiments.
[0009] Fig. 5 shows a second example of UE operations for handling overlapping resources configured by a switching pattern and a CSS configuration according to various example embodiments.
[0010] Fig. 6 shows a third example of UE operations for handling overlapping resources configured by a switching pattern and a CSS configuration according to various example embodiments.
[0011] Fig. 7 shows a fourth example of UE operations for handling overlapping resources configured by a switching pattern and a CSS configuration according to various example embodiments.
[0012] Fig. 8 shows example UE operations when a scheduling gap is less than a switching gap according to various example embodiments.Detailed Description
[0013] The example embodiments may be further understood with reference to the following description and the related appended drawings, wherein like elements are provided with the same reference numerals. The example embodiments relate to a UE being configured with a switching pattern on a first carrier and a second carrier and the UE also being configured with a monitoring configuration (e.g., search space (SS) configuration) on the first carrier.
[0014] The example embodiments are described with regard to a UE.However, reference to a UE is merely provided for illustrative purposes. The example embodiments may be utilized with any electronic component that may establish a connection to an accessory device and is configured with the hardware, software, and / or firmware to exchange information and data with accessory devices. Therefore, the UE as described herein is used to represent any electronic component.
[0015] The example embodiments are also described with reference to a 5G New Radio (NR) network. However, the example embodiments may also be implemented in other types of networks, including but not limited to LTE networks, future evolutions of the cellular protocol (e.g., 5G-advanced networks, 6G networks, 7G networks, etc. ) , or any other type of network.
[0016] The example embodiments are also described with regard to low-complexity UEs that may not be able to support a single Tx / Rx chain per carrier. In the example embodiments described below, the example UE has a single Rx / Tx chain that is described as being used to transmit signals on a first carrier and receiver signals on a second carrier. However, the example embodiments are not limited to this type of implementation. The example embodiments may also be used in UEs that support more than two carriers that share a single Rx / Tx chain or UEs that have multiple Tx / Rx chains but one or more of these multiple Tx / Rx chains each support TX / Rx operations for multiple carriers.
[0017] The example embodiments are further described with carrier aggregation (CA) where multiple carriers may serve the UE. In CA, the UE may be configured with a primary cell group (PCG) and a secondary cell group (SCG) . The PCG may include a primary cell (PCell) and one or more secondary cells (SCells) for communication between the UE and the network. The PCell serves a primary component carrier (PCC) and the SCells serve one or more secondary component carriers (SCCs) . In addition, the SCG may include a primary secondary cell (PSCell) and one or more SCells for communication between the UE and the network. The PSCell serves a primary secondary component carrier (PSCC) and the SCells serve one or more SCCs.
[0018] In some example embodiments, an SCell may serve a Supplemental Downlink (SDL) carrier. An SDL carrier is a carrier that is only used for downlink communications from the network to the UE. Typically, an SDL carrier is served on lower frequency bands. However, operation in the lower frequency bands is not a requirement of the example embodiments.
[0019] The example embodiments are also described with reference to CA and switching between carriers. The CA configuration may include the UE being configured to perform Tx / Rx operations on a Frequency Division Duplex (FDD) carrier and only Rx operations on the SDL carrier. The switching may occur from the FDD carrier to the SDL carrier or vice versa. However, the example embodiments are not limited to only switching between FDD carriers and SDL carriers. The example embodiments may be implemented for any carriers in a CA band combination. In addition, the example embodiments are described with reference to a semi-static switching pattern between carriers. However, the example embodiments are not limited to semi-static switching patterns but may also be implemented when a dynamic switching pattern is used.
[0020] The example embodiments relate a UE being configured with a switching pattern on a first carrier and a second carrier and the UE also being configured with a monitoring configuration (e.g., search space (SS) configuration) on the first carrier. In some example embodiments, the switching pattern and the monitoring configuration have overlapping resources in the time domain. The example embodiments provide operations for a UE to determine whether to follow the switching pattern or the monitoring configuration for these overlapping resources. Each of these example embodiments will be described in greater detail below.
[0021] Fig. 1 shows an example network arrangement 100 according to various example embodiments. The example network arrangement 100 includes a UE 110. The UE 110 may be any type of electronic component that is configured to communicate via a network, e.g., mobile phones, tablet computers, desktop computers, smartphones, embedded devices, wearables, Internet of Things (IoT) devices, etc. An actual network arrangement may include any number of UEs being used by any number of users. Thus, the example of one UE 110 is merely provided for illustrative purposes.
[0022] The UE 110 may be configured to communicate with one or more networks. In the example of the network arrangement 100, the network with which the UE 110 may wirelessly communicate is a 5G NR radio access network (RAN) 120. The UE 110 may also communicate with other types of networks (e.g., 5G cloud RAN, a next generation RAN (NG-RAN) , a legacy cellular network, etc. ) and the UE 110 may also communicate with networks over a wired connection. With regard to the example embodiments, the UE 110 may establish a connection with the 5G NR RAN 120. Therefore, the UE 110 may have a 5G NR chipset to communicate with the NR RAN 120.
[0023] The 5G NR RAN 120 may be portions of a cellular network that may be deployed by a network carrier (e.g., Verizon, AT&T, T-Mobile, etc. ) . The RAN 120 may include cells or base stations that are configured to send and receive traffic from UEs that are equipped with the appropriate cellular chip set. In this example, the 5G NR RAN 120 includes the gNB 120A and the gNB 120B. However, reference to a gNB is merely provided for illustrative purposes, any appropriate base station or cell may be deployed (e.g., Node Bs, eNodeBs, HeNBs, eNBs, gNBs, gNodeBs, macrocells, microcells, small cells, femtocells, etc. ) .
[0024] Any association procedure may be performed for the UE 110 to connect to the 5G NR RAN 120. For example, as discussed above, the 5G NR RAN 120 may be associated with a particular network carrier where the UE 110 and / or the user thereof has a contract and credential information (e.g., stored on a SIM card) . Upon detecting the presence of the 5G NR RAN 120, the UE 110 may transmit the corresponding credential information to associate with the 5G NR RAN 120. More specifically, the UE 110 may associate with a specific cell (e.g., gNB 120A) .
[0025] The network arrangement 100 also includes a cellular core network 130, the Internet 140, an IP Multimedia Subsystem (IMS) 150, and a network services backbone 160. The cellular core network 130 manages the traffic that flows between the cellular network and the Internet 140. The IMS 150 may be generally described as an architecture for delivering multimedia services to the UE 110 using the IP protocol. The IMS 150 may communicate with the cellular core network 130 and the Internet 140 to provide the multimedia services to the UE 110. The network services backbone 160 is in communication either directly or indirectly with the Internet 140 and the cellular core network 130. The network services backbone 160 may be generally described as a set of components (e.g., servers, network storage arrangements, etc. ) that implement a suite of services that may be used to extend the functionalities of the UE 110 in communication with the various networks.
[0026] Fig. 2 shows an example UE 110 according to various example embodiments. The UE 110 will be described with regard to the network arrangement 100 of Fig. 1. The UE 110 may represent any electronic device and may include a processor 205, a memory arrangement 210, a display device 215, an input / output (I / O) device 220, a transceiver 225, and other components 230. The other components 230 may include, for example, an audio input device, an audio output device, a battery that provides a limited power supply, a data acquisition device, ports to electrically connect the UE 110 to other electronic devices, sensors to detect conditions of the UE 110, etc.
[0027] The processor 205 may be configured to execute a plurality of engines for the UE 110. For example, the engines may include a Switching Pattern / SS engine 235 for performing various operations of the example embodiments. The operations include, but are not limited to, processing switching pattern configurations and monitoring configurations, determining there are overlapping resources in the time domain between the switching pattern configurations and the monitoring configurations and determining whether to prioritize the switching pattern configurations or the monitoring configurations Each of these example operations will be described in more detail below.
[0028] The above referenced engine being an application (e.g., a program) executed by the processor 205 is only example. The functionality associated with the engines may also be represented as a separate incorporated component of the UE 110 or may be a modular component coupled to the UE 110, e.g., an integrated circuit with or without firmware. For example, the integrated circuit may include input circuitry to receive signals and processing circuitry to process the signals and other information. The engines may also be embodied as one application or separate applications. In addition, in some UEs, the functionality described for the processor 205 is split among two or more processors such as a baseband processor and an applications processor. The example embodiments may be implemented in any of these or other configurations of a UE.
[0029] The memory arrangement 210 may be a hardware component configured to store data related to operations performed by the UE 110. The display device 215 may be a hardware component configured to show data to a user while the I / O device 220 may be a hardware component that enables the user to enter inputs. The display device 215 and the I / O device 220 may be separate components or integrated together such as a touchscreen.
[0030] The transceiver 225 may be a hardware component configured to establish a connection with the 5G NR-RAN 120, an LTE-RAN (not pictured) , a legacy RAN (not pictured) , a WLAN (not pictured) , etc. The transceiver 225 may include a main radio (MR) and a low power wakeup radio (LP-WUR) . Accordingly, the transceiver 225 may operate on a variety of different frequencies or channels (e.g., set of consecutive frequencies) . The transceiver 225 includes circuitry configured to transmit and / or receive signals (e.g., control signals, data signals) . Such signals may be encoded with information implementing any one of the methods described herein. The processor 205 may be operably coupled to the transceiver 225 and configured to receive from and / or transmit signals to the transceiver 225. The processor 205 may be configured to encode, decode and / or process signals (e.g., signaling from a base station of a network) for implementing any one of the methods described herein.
[0031] Fig. 3 shows an example base station 300 according to various example embodiments. The base station 300 may represent the gNB 120A or any other access node through which the UE 110 may establish a connection and manage network operations.
[0032] The base station 300 may include a processor 305, a memory arrangement 310, an input / output (I / O) device 315, a transceiver 320, and other components 325. The other components 325 may include, for example, an audio input device, an audio output device, a battery, a data acquisition device, ports to electrically connect the base station 300 to other electronic devices and / or power sources, etc.
[0033] The processor 305 may be configured to execute a plurality of engines for the UE 110. For example, the engines may include a Switching Pattern / SS configuration engine 330 for performing operations related to the example embodiments. The operations include, but are not limited to, configuring the UE with a switching pattern configuration and configuring the UE with a monitoring configuration. Each of these example operations will be described in more detail below.
[0034] The memory arrangement 310 may be a hardware component configured to store data related to operations performed by the base station 300. The I / O device 315 may be a hardware component or ports that enable a user to interact with the base station 300. The transceiver 320 may be a hardware component configured to exchange data with the UE 110 and any other UE in the network arrangement 100.
[0035] The transceiver 320 may be a hardware component configured to exchange data with the UE 110 and any other UE in the network arrangement 100. The transceiver 320 may operate on a variety of different frequencies or channels (e.g., set of consecutive frequencies) . The transceiver 320 includes circuitry configured to transmit and / or receive signals (e.g., control signals, data signals) . Such signals may be encoded with information implementing any one of the methods described herein. The processor 305 may be operably coupled to the transceiver 320 and configured to receive from and / or transmit signals to the transceiver 320. The processor 305 may be configured to encode, decode and / or process signals (e.g., signaling from a UE) for implementing any one of the methods described herein.
[0036] As described above, the example embodiments are related to various operations related to switching between carriers using a common Tx / Rx chain in a UE. The UE may report its capabilities with respect to the Tx / Rx chain to the network, e.g., in a UE capability report. The network may then configure the UE with CA based on the capabilities of the UE. The example embodiments may be described with reference to various scenarios. For example, a first scenario may include Tx / Rx on FDD carrier 1 and no Rx on SDL carrier 2, e.g., the Tx / Rx chain of the UE tuned to the PCell. A second scenario may include Rx on SDL carrier 2 and no Tx / Rx on FDD carrier 1, e.g., the Tx / Rx chain of the UE tuned to the SCell serving the SDL carrier. The UE may perform switching of the Tx / Rx chain between these two scenarios based on a switching pattern configured by the network. However, the example embodiments are not limited to these scenarios.
[0037] When a UE performs switching between carriers, there may be a switching gap. A switching gap is the time it takes the UE to re-tune the Tx / Rx chain to the frequencies of the different carriers. There also may be other operations performed by the UE during this switching gap. The UE is not expected to perform any Tx or Rx operations during this switching gap. However, there may be cases where the network schedules the UE to perform Tx or Rx operations during the switching gap.
[0038] In the above example scenarios, a UE may also be configured with a common search space (CSS) and a UE-specific search space (USS) depending on the carrier switching. A CSS may be monitoring occasions in a Physical Downlink Control Channel (PDCCH) scheduled by the network for multiple UEs, e.g., multiple UEs monitor the same PDCCH CSS for information (e.g., System Information Block (SIB) scheduling, Synchronization Signal Block (SSB) initial access, etc. ) that is applicable to the multiple UEs. A USS may be a search space that is specifically configured for the UE, e.g., the search space is not intended for multiple UEs. The UE may monitor each of these search spaces. The example embodiments provide operations for the UE to consider the switching pattern, the switching gap location and the search space configuration for the UE. The example embodiments provide operations for both the CSS and the USS.
[0039] Initially, the example embodiments related to the CSS are described. In these example embodiments, a UE may be configured with a semi-static switching pattern between carrier 1 (FDD carrier with both Rx / Tx at UE side) and carrier 2 (SDL carrier with Rx at UE side) . The switching pattern configuration may include time-domain behavior information indicating the location in time and the duration that the UE is to be tuned to the carrier 1 or carrier 2. The UE may also be configured with at least 1 CSS set on at least one of the carriers. In some cases, the switching pattern may not be aligned with the CSS, e.g., the switching pattern indicates the UE is to be on carrier 2 but the at least 1 CSS set is scheduled for carrier 1 (or vice versa) . The example embodiments provide various operations for handling this scenario of overlapping resources.
[0040] In some example embodiments, the UE may ignore the switching pattern for those overlapping resources and switches to the carrier to monitor the CSS set, e.g., the CSS configuration is protected or prioritized with respect to the switching pattern configuration. An example of this is described with reference to Fig. 4.
[0041] Fig. 4 shows a first example of UE operations 400 for handling overlapping resources configured by a switching pattern and a common search space (CSS) configuration according to various example embodiments. The example of Fig. 4 shows a switching pattern configuration 410 that configures the UE to switch between carrier 1 and carrier 2. In this example, the switching pattern configuration 410 comprises time durations 413 and 417 when the UE is scheduled to be tuned to carrier 1 and time durations 423 and 427 when the UE is scheduled to be tuned to carrier 2.
[0042] The example of Fig. 4 also shows a CSS configuration 430 where the UE is scheduled to monitor CSS on carrier 1 during the durations 432-436. As can be seen from Fig. 4, in this example, the durations 432 and 436 overlap with the durations 413 and 417, respectively. During this time, both the switching pattern configuration 410 and the CSS configuration 430 indicate the UE is to perform operations on carrier 1. Thus, there is no conflict between the switching pattern configuration 410 and the CSS configuration 430 and the UE may monitor the CSS on carrier 1 and perform any Tx / Rx operations on carrier 1.
[0043] On the other hand, the CSS duration 434 on carrier 1 overlaps with the carrier 2 duration 423 of the switching pattern configuration 410. The UE may not be equipped to simultaneously perform operations on both carrier 1 and carrier 2, e.g., overlapping resources. As described above, in some example embodiments, the UE may ignore the switching pattern for those overlapping resources and switch to the carrier to monitor the CSS set. Thus, in this example, the UE ignores the carrier 2 duration 423 of the switching pattern configuration 410 and monitors the carrier 1 CSS duration 434.
[0044] In other example embodiments, when there is overlapping resources, the UE may not be expected to monitor CSS as per the CSS configuration. An example of this is described with reference to Fig. 5.
[0045] Fig. 5 shows a second example of UE operations 500 for handling overlapping resources configured by a switching pattern and a CSS configuration according to various example embodiments. The example of Fig. 5 shows a switching pattern configuration 510 that configures the UE to switch between carrier 1 and carrier 2. In this example, the switching pattern configuration 510 comprises time durations 513 and 517 when the UE is scheduled to be tuned to carrier 1 and time durations 523 and 527 when the UE is scheduled to be tuned to carrier 2.
[0046] The example of Fig. 5 also shows a CSS configuration 530 where the UE is scheduled to monitor CSS on carrier 1 during the durations 532-536. Similar to the example of Fig. 4, the durations 532 and 536 overlap with the durations 513 and 517, respectively, and there is no issue with the UE monitoring the CSS on carrier 1 and performing any Tx / Rx operations on carrier 1.
[0047] Also similar to Fig. 4, the CSS duration 534 on carrier 1 overlaps with the carrier 2 duration 523 of the switching pattern configuration 510. The UE may not be equipped to simultaneously perform operations on both carrier 1 and carrier 2, e.g., overlapping resources. As described above, in some example embodiments, the UE may not be expected to monitor CSS as per the CSS configuration. Thus, in this example, the UE ignores the carrier 1 CSS duration 534 and switches to the carrier 2 duration 523 of the switching pattern configuration 510 to perform any scheduled Tx / Rx operations on carrier 2.
[0048] In further example embodiments, a combination of the above two example embodiments may be used. For example, if the carrier that is not configured with a CSS set (e.g., carrier 2 in the examples of Figs. 4 and 5) is not scheduled for DL reception / monitoring on the overlapping resources, then the first example embodiments may be used (e.g., ignore the carrier 2 duration with overlapping resources. For example, referring back to Fig. 4, the UE may be configured as described above. However, the UE may also not be scheduled for any DL Rx during the duration 423. Thus, the UE may ignore the carrier 2 duration 423 and monitor the carrier 1 CSS duration 434. It is described that the UE is not scheduled for DL Rx during the duration 423 because, in this example, carrier 2 is the SDL carrier where only Rx operations may be scheduled.
[0049] On the other hand, if there are DL Rx scheduled for the carrier 2 duration, then the other example embodiments, e.g., where the CSS monitoring is ignored may be used. For example, referring back to Fig. 5, the UE may be configured as described above. In this example, the UE may be scheduled for DL Rx during the duration 523. Thus, the UE may ignore the carrier 1 CSS duration 534 and monitor the carrier 2 duration 523 for the DL Rx. Thus, in these example embodiments, the prioritization of the switching configuration or the CSS configuration may be based on a scheduling configuration for actual DL data.
[0050] In some example embodiments, multiple mechanisms for semi-static switching between the two carriers may be supported. For example, in a first mechanism, an explicit configuration of the switching pattern is provided to the UE. In a second mechanism, the switching between carriers may be a result of configurations for scheduling / monitoring, e.g., CSS set configuration. When both mechanisms are supported, the second mechanism may be prioritized over the first mechanism. These example embodiments may be a generalized version of the above example embodiments.
[0051] For example, the first mechanism may be the switching pattern configuration 410 or 510 of Figs. 4 and 5, respectively. If that is the only configuration provided to the UE, the UE will switch between carriers based on those explicit configurations. The second mechanism may be the various operations (e.g., prioritizations of carrier 1 or carrier 2) also described above with reference to Figs. 4 and 5. If the UE is configured with both the first and second mechanisms, the UE may prioritize the second mechanism to handle the overlapping resources.
[0052] In some example embodiments, after the switching is performed, e.g., switching mechanisms as described above, then further switching may be performed. In one option, the further switching may be for the UE to remain on the carrier that was triggered with scheduling / monitoring configuration until a next switching pattern triggered time instance is reached. An example of this is described with reference to Fig. 6.
[0053] Fig. 6 shows a third example of UE operations 600 for handling overlapping resources configured by a switching pattern and a CSS configuration according to various example embodiments. The example of Fig. 6 shows a switching pattern configuration 610 that configures the UE to switch between carrier 1 and carrier 2. In this example, the switching pattern configuration 610 comprises time durations 613 and 617 when the UE is scheduled to be tuned to carrier 1 and time durations 623 and 627 when the UE is scheduled to be tuned to carrier 2.
[0054] The example of Fig. 6 also shows a CSS configuration 630 where the UE is scheduled to monitor CSS on carrier 1 during the durations 632-636. Similar to the example of Fig. 4, the durations 632 and 636 overlap with the durations 613 and 617, respectively, and there is no issue with the UE monitoring the CSS on carrier 1 and performing any Tx / Rx operations on carrier 1.
[0055] Also similar to Fig. 4, the CSS duration 634 on carrier 1 overlaps with the carrier 2 duration 623 of the switching pattern configuration 510. The UE may not be equipped to simultaneously perform operations on both carrier 1 and carrier 2, e.g., overlapping resources. In this example, the UE ignores the carrier 2 duration 623 and switches to the carrier 1 CSS duration 634 to monitor for CSS.
[0056] However, as shown in Fig. 6, the CSS duration 634 does not overlap with the entirety of the carrier 2 duration 623. Thus, the UE may be configured with further switching rules to handle this scenario. As described above, in one option, the further switching may be for the UE to remain on the carrier that was triggered with scheduling / monitoring configuration until a next switching pattern triggered time instance is reached. Thus, in the example of Fig. 6, the UE may remain on carrier 1 after the CSS duration 634 is complete and through the duration 617. When the next scheduled switch to carrier 2 is reached (e.g., carrier 2 duration 627) , the UE may then switch to carrier 2.
[0057] In another option, the further switching may be for the UE to switch immediately after the scheduling / monitoring configuration is concluded. An example of this is described with reference to Fig. 7.
[0058] Fig. 7 shows a fourth example of UE operations 700 for handling overlapping resources configured by a switching pattern and a CSS configuration according to various example embodiments. The example of Fig. 7 is similar to the example of Fig. 6 in that there is a switching pattern configuration 710 comprising time durations 713 and 717 for carrier 1 and time durations 723 and 727 for carrier 2. Also, a CSS configuration 730 where the UE is scheduled to monitor CSS on carrier 1 during the durations 732-736. The resources of the carrier 1 CSS duration 734 overlap with the resources of the carrier 2 duration 723.
[0059] In this example, the UE initially ignores the carrier 2 duration 723 and switches to the carrier 1 CSS duration 734 to monitor for CSS. However, similar to Fig. 6, the carrier 1 CSS duration 734 does not overlap with the entirety of the carrier 2 duration 723. As described above, in one option, the further switching may be performed immediately after the scheduling / monitoring configuration is concluded. Thus, in the example of Fig. 7, when the CSS monitoring in the carrier 1 CSS duration 734 is complete, the UE may switch (e.g., at time 740) from the carrier 1 to the carrier 2 to monitor the remaining time of the carrier 2 duration 723.
[0060] As stated above, the example embodiments also provide operations related to the switching gap when there are overlapping resources. In an ideal scenario, the network would schedule a scheduling gap to be larger than the switching gap, e.g., there would be no Tx / Rx or CSS during the scheduling gap and thus the switching gap would not affect any Tx / Rx or CSS monitoring. However, there may be scenarios where the network schedules a scheduling gap that is less than the switching gap. In this scenario, one of the carriers may be a victim carrier. In some example embodiments, the UE may be configured to determine that the victim carrier is the non-CSS carrier (e.g., carrier 2) . An example of this is shown with reference to Fig. 8.
[0061] Fig. 8 shows example UE operations 800 when a scheduling gap is less than a switching gap according to various example embodiments. The example of Fig. 8 is similar to the previous examples in that there is a switching pattern configuration 810 comprising time durations 813 and 817 for carrier 1 and time durations 823 and 827 for carrier 2. Also, a CSS configuration 830 where the UE is scheduled to monitor CSS on carrier 1 during the durations 832-836.
[0062] In this example, the switching gap 840 is larger than the scheduling gap between the carrier 2 duration 823 and the carrier 1 duration 817. This means that one of the carriers may be a victim carrier. As stated above, in some example embodiments, the UE may determine the victim carrier in this scenario is the non-CSS carrier (e.g., carrier 2) . In these example embodiments, if a switching is triggered by CSS, then the UE may switch at least at a time from which the switching gap requirement is satisfied to the start of monitoring of the CSS. Thus, in the example of Fig. 8, because the CSS duration 836 starts at the same time as the carrier 1 duration 817, the UE should start the switching such that the UE is available to monitor the entire CSS duration 836. To accomplish this, the UE may start the switching during the carrier 2 duration 823. Thus, the carrier 2 is the victim carrier.
[0063] In some example embodiments, the network may not schedule the CSS to be misaligned with the switching pattern, e.g., the overlapping resources described with reference to Figs. 4-8 may not occur. In these example embodiments, there are no overlapping resources and therefore the UE may not have to ignore any of the switching pattern or the CSS.
[0064] The following example embodiments are related to the USS. Similar to the CSS examples, a UE may be configured with a semi-static switching pattern between carrier 1 (FDD carrier with both Rx / Tx at UE side) and carrier 2 (SDL carrier with Rx at UE side) . The switching pattern configuration may include time-domain behavior information indicating the location in time and the duration that the UE is to be tuned to the carrier 1 or carrier 2. The UE may also be configured with at least 1 USS set on at least one of the carriers. In some cases, the switching pattern may not be aligned with the USS, e.g., the switching pattern indicates the UE is to be on carrier 2 but the at least 1 USS set is scheduled for carrier 1 (or vice versa) . The example embodiments provide various operations for handling this scenario of overlapping resources.
[0065] In some example embodiments, when such overlapping resources occur, the UE may not be expected to monitor as per the USS configuration, e.g., the UE may ignore the USS configuration and follow the switching pattern configuration.
[0066] In other example embodiments, the network may not schedule the USS to be misaligned with the switching pattern. In these example embodiments, there are no overlapping resources and therefore the UE may not have to ignore any of the switching pattern or the USS.
[0067] In some of the example embodiments described above, it was described that the network may not schedule the CSS or USS to be misaligned with the switching pattern. This scheduling restriction on the network may also be extended to other types of configurations for scheduling / monitoring that trigger a switch in different direction from the configured switching pattern.Examples
[0068] In a first example, a method, comprising processing, based on signaling from a network, a switching pattern configuration comprising a switching pattern including durations to tune a transmission / reception (Tx / Rx) chain to each of a first carrier and a second carrier, wherein the first carrier is configured for uplink (UL) and downlink (DL) operations and the second carrier is configured for DL operations only and processing, based on signaling from the network, a monitoring configuration comprising occasions to monitor the first carrier for information transmitted by the network.
[0069] In a second example, the method of the first example, wherein the monitoring configuration comprises a common search space (CSS) configuration comprising CSS occasions on the first carrier to monitor for information transmitted by the network.
[0070] In a third example, the method of the second example, wherein at least one CSS occasion comprises time domain resources in the first carrier that overlap with time domain resources of at least one duration in the second carrier.
[0071] In a fourth example, the method of the third example, further comprising, tuning, during the time domain resources in the first carrier, the Tx / Rx chain to the first carrier to monitor for the CSS.
[0072] In a fifth example, the method of the fourth example, further comprising refrain from tuning the Tx / Rx chain to the second carrier until a next duration of the second carrier of the switching pattern after the at least one duration.
[0073] In a sixth example, the method of the fourth example, further comprising, when at least a portion of the time domain resources of the at least one duration of the switching pattern in the second carrier remains after the time domain resources in the first carrier, tuning the Tx / Rx chain to the second carrier to monitor for DL transmissions in the at least a portion of the time domain resources of the at least one duration in the second carrier of the switching pattern.
[0074] In a seventh example, the method of the third example, further comprising tuning, during the time domain resources of the at least one duration in the second carrier of the switching pattern, the Tx / Rx chain to the second carrier to monitor for DL transmissions.
[0075] In an eighth example, the method of the third example, further comprising determining whether any DL transmissions are scheduled for the time domain resources of the at least one duration in the second carrier of the switching pattern, when DL transmissions are scheduled for the time domain resources of the at least one duration of the switching pattern in the second carrier, tuning, during the time domain resources of the at least one duration in the second carrier of the switching pattern, the Tx / Rx chain to the second carrier to monitor for DL transmissions and when DL transmissions are not scheduled for the time domain resources of the at least one duration of the switching pattern in the second carrier, tuning, during the time domain resources in the first carrier, the Tx / Rx chain to the first carrier to monitor for the CSS.
[0076] In a ninth example, the method of the second example, wherein a switching gap to switch the Tx / Rx chain from the second carrier to the first carrier is larger than a scheduling gap between an end of a duration of the switching pattern of the second carrier and a start of a CSS occasion, wherein the method further comprises starting a switch of the Tx / Rx chain from the second carrier to the first carrier at a time earlier than the end of the duration of the switching pattern of the second carrier, wherein the switch is completed prior to the start of the CSS occasion.
[0077] In a tenth example, the method of the second example, wherein the switching pattern configuration does not include any durations of the switching pattern in the second carrier that overlap with CSS occasions in the first carrier.
[0078] In an eleventh example, the method of the first example, further comprising prioritizing the monitoring configuration comprising the occasions to monitor for the information transmitted by the network on the first carrier, wherein prioritizing comprises tuning the Tx / Rx chain to the first carrier during the occasions without regard for the switching pattern configuration.
[0079] In a twelfth example, the method of the first example, wherein the switching pattern configuration does not include any durations of the switching pattern in the second carrier that overlap with occasions to monitor for information transmitted by the network on the first carrier.
[0080] In a thirteenth example, the method of the first example, wherein the monitoring configuration comprises a user equipment (UE) -specific search space (USS) configuration comprising USS occasions to monitor for information transmitted by the network on the first carrier.
[0081] In a fourteenth example, the method of the thirteenth example, wherein at least one USS occasion comprises time domain resources in the first carrier that overlap with time domain resources of at least one duration of the switching pattern in the second carrier, wherein the method further comprises tuning, during the time domain resources of the at least one duration of the switching pattern in the second carrier, the Tx / Rx chain to the second carrier to monitor for DL transmissions.
[0082] In a fifteenth example, the method of the thirteenth example, wherein the switching pattern configuration does not include any durations of the switching pattern in the second carrier that overlap with USS occasions in the first carrier.
[0083] In a sixteenth example, a processor configured to perform any of the methods of the first through fifteenth examples.
[0084] In a sixteenth example, a user equipment (UE) configured to perform any of the methods of the first through fifteenth examples.
[0085] Those skilled in the art will understand that the above-described example embodiments may be implemented in any suitable software or hardware configuration or combination thereof. An example hardware platform for implementing the example embodiments may include, for example, an Intel x86 based platform with compatible operating system, a Windows OS, a Mac platform and MAC OS, a mobile device having an operating system such as iOS, Android, etc. The example embodiments of the above described method may be embodied as a program containing lines of code stored on a non-transitory computer readable storage medium that, when compiled, may be executed on a processor or microprocessor.
[0086] Although this application described various embodiments each having different features in various combinations, those skilled in the art will understand that any of the features of one embodiment may be combined with the features of the other embodiments in any manner not specifically disclaimed or which is not functionally or logically inconsistent with the operation of the device or the stated functions of the disclosed embodiments.
[0087] 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.
[0088] It will be apparent to those skilled in the art that various modifications may be made in the present disclosure, without departing from the spirit or the scope of the disclosure. Thus, it is intended that the present disclosure cover modifications and variations of this disclosure provided they come within the scope of the appended claims and their equivalent.
Claims
1.An apparatus comprising memory coupled to processing circuitry, the processing circuitry configured to:process, based on signaling from a network, a switching pattern configuration comprising a switching pattern including durations to tune a transmission / reception (Tx / Rx) chain to each of a first carrier and a second carrier, wherein the first carrier is configured for uplink (UL) and downlink (DL) operations and the second carrier is configured for DL operations only; andprocess, based on signaling from the network, a monitoring configuration comprising occasions to monitor the first carrier for information transmitted by the network.2.The apparatus of claim 1, wherein the monitoring configuration comprises a common search space (CSS) configuration comprising CSS occasions on the first carrier to monitor for information transmitted by the network.3.The apparatus of claim 2, wherein at least one CSS occasion comprises time domain resources in the first carrier that overlap with time domain resources of at least one duration in the second carrier.4.The apparatus of claim 3, wherein the processing circuitry is further configured to:tune, during the time domain resources in the first carrier, the Tx / Rx chain to the first carrier to monitor for the CSS.5.The apparatus of claim 4, wherein the processing circuitry is further configured to:refrain from tuning the Tx / Rx chain to the second carrier until a next duration of the second carrier of the switching pattern after the at least one duration.6.The apparatus of claim 4, wherein the processing circuitry is further configured to:when at least a portion of the time domain resources of the at least one duration of the switching pattern in the second carrier remains after the time domain resources in the first carrier, tune the Tx / Rx chain to the second carrier to monitor for DL transmissions in the at least a portion of the time domain resources of the at least one duration in the second carrier of the switching pattern.7.The apparatus of claim 3, wherein the processing circuitry is further configured to:tune, during the time domain resources of the at least one duration in the second carrier of the switching pattern, the Tx / Rx chain to the second carrier to monitor for DL transmissions.8.The apparatus of claim 3, wherein the processing circuitry is further configured to:determine whether any DL transmissions are scheduled for the time domain resources of the at least one duration in the second carrier of the switching pattern;when DL transmissions are scheduled for the time domain resources of the at least one duration of the switching pattern in the second carrier, tune, during the time domain resources of the at least one duration in the second carrier of the switching pattern, the Tx / Rx chain to the second carrier to monitor for DL transmissions; andwhen DL transmissions are not scheduled for the time domain resources of the at least one duration of the switching pattern in the second carrier, tune, during the time domain resources in the first carrier, the Tx / Rx chain to the first carrier to monitor for the CSS.9.The apparatus of claim 2, wherein a switching gap to switch the Tx / Rx chain from the second carrier to the first carrier is larger than a scheduling gap between an end of a duration of the switching pattern of the second carrier and a start of a CSS occasion, wherein the processing circuitry is further configured to:start a switch of the Tx / Rx chain from the second carrier to the first carrier at a time earlier than the end of the duration of the switching pattern of the second carrier, wherein the switch is completed prior to the start of the CSS occasion.10.The apparatus of claim 2, wherein the switching pattern configuration does not include any durations of the switching pattern in the second carrier that overlap with CSS occasions in the first carrier.11.The apparatus of claim 1, wherein the processing circuitry is further configured to:prioritize the monitoring configuration comprising the occasions to monitor for the information transmitted by the network on the first carrier, wherein prioritizing comprises tuning the Tx / Rx chain to the first carrier during the occasions without regard for the switching pattern configuration.12.The apparatus of claim 1, wherein the switching pattern configuration does not include any durations of the switching pattern in the second carrier that overlap with occasions to monitor for information transmitted by the network on the first carrier.13.The apparatus of claim 1, wherein the monitoring configuration comprises a user equipment (UE) -specific search space (USS) configuration comprising USS occasions to monitor for information transmitted by the network on the first carrier.14.The apparatus of claim 13, wherein at least one USS occasion comprises time domain resources in the first carrier that overlap with time domain resources of at least one duration of the switching pattern in the second carrier, wherein the processing circuitry is further configured to:tune, during the time domain resources of the at least one duration of the switching pattern in the second carrier, the Tx / Rx chain to the second carrier to monitor for DL transmissions.15.The apparatus of claim 13, wherein the switching pattern configuration does not include any durations of the switching pattern in the second carrier that overlap with USS occasions in the first carrier.16.A method, comprising:processing, based on signaling from a network, a switching pattern configuration comprising a switching pattern including durations to tune a transmission / reception (Tx / Rx) chain to each of a first carrier and a second carrier, wherein the first carrier is configured for uplink (UL) and downlink (DL) operations and the second carrier is configured for DL operations only; andprocessing, based on signaling from the network, a monitoring configuration comprising occasions to monitor the first carrier for information transmitted by the network.17.The method of claim 16, wherein the monitoring configuration comprises a common search space (CSS) configuration comprising CSS occasions on the first carrier to monitor for information transmitted by the network.18.The method of claim 2, wherein at least one CSS occasion comprises time domain resources in the first carrier that overlap with time domain resources of at least one duration in the second carrier, the method further comprising:tuning, during the time domain resources in the first carrier, the Tx / Rx chain to the first carrier to monitor for the CSS.19.The method of claim 16, wherein the monitoring configuration comprises a user equipment (UE) -specific search space (USS) configuration comprising USS occasions to monitor for information transmitted by the network on the first carrier.20.The method of claim 19, wherein at least one USS occasion comprises time domain resources in the first carrier that overlap with time domain resources of at least one duration of the switching pattern in the second carrier, wherein the method further comprises:tuning, during the time domain resources of the at least one duration of the switching pattern in the second carrier, the Tx / Rx chain to the second carrier to monitor for DL transmissions.