Carrier aggregation and carrier switching
Patent Information
- Application Number
- PCT/CN2025/082192
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-09-17
Smart Images

Figure CN2025082192_17092026_PF_FP_ABST
Abstract
Description
Carrier Aggregation and Carrier SwitchingBackground
[0001] 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. Low-complexity UEs may not have multiple Tx / Rx chains. It may be useful to allow low-complexity UEs to benefit from CA.Summary
[0002] 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 information related to a switching pattern, the information including an identification of a first carrier, an identification of a second carrier and a duration associated with the switching pattern, determine, based on the switching pattern, to tune a transmission / reception (Tx / Rx) chain to one of the first carrier or the second carrier and perform Tx or Rx operations using the one of the first carrier or the second carrier.
[0003] Other example embodiments are related to a method for processing, based on signaling from a network, a switching pattern configuration comprising information related to a switching pattern, the information including an identification of a first carrier, an identification of a second carrier and a duration associated with the switching pattern, determining, based on the switching pattern, to tune a transmission / reception (Tx / Rx) chain to one of the first carrier or the second carrier and performing Tx or Rx operations using the one of the first carrier or the second carrier.Brief Description of the Drawings
[0004] Fig. 1 shows an example network arrangement according to various example embodiments.
[0005] Fig. 2 shows an example UE according to various example embodiments.
[0006] Fig. 3A shows an example cyclic switching pattern diagram between carriers after time durations equal to a time “t” according to various example embodiments.
[0007] Fig. 3B shows an example cyclic switching pattern diagram between carriers after time durations equal to times “t1” and “t2” according to various example embodiments.
[0008] Fig. 4 shows an example initial switching gap diagram for a UE configured with a semi-static switching pattern according to various example embodiments.
[0009] Fig. 5 shows an example switching diagram for a subsequent switching between carriers after an initial switch according to various example embodiments.
[0010] Fig. 6 shows an example base station according to various example embodiments.Detailed Description
[0011] 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.
[0012] The example embodiments relate to enabling carrier aggregation via switching between multiple carriers that are configured with a common transmission (Tx) / reception (Rx) chain within a low-complexity user equipment (UE) .
[0013] The example embodiments are described with regard to a user equipment (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 a network and is configured with the hardware, software, and / or firmware to exchange information and data with the network. Therefore, the UE as described herein is used to represent any electronic component.
[0014] 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 legacy cellular networks (e.g., Long Term Evolution (LTE) ) , future evolutions of the cellular protocol (e.g., 5G advanced, 6G, 7G, etc. ) , or any other type of network.
[0015] 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.
[0016] 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 a Supplemental Downlink (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.
[0017] The example embodiments relate to enabling a low-complexity UE equipped with a Tx / Rx chain shared between multiple carriers to switch between those carriers via the common Tx / Rx chain. In some example embodiments, the UE may be configured with a switching pattern to indicate when the UE is to switch between carriers. The example embodiments also provide manners of signaling the switching pattern to the UE. Some example embodiments also provide timing for when an initial switch from a first carrier to a second carrier is to occur and timing for when subsequent carrier switches are to occur. In addition, the example embodiments also prove scheduling restrictions for UEs that implement the switching pattern. These and other example embodiments are des cribed in greater detail below.
[0018] 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, phablets, embedded devices, wearables, Internet of Things (IoT) devices (including connected vehicles) , 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.
[0019] The UE 110 may be configured to communicate with one or more networks. In the example of the network configuration 100, the network with which the UE 110 may wirelessly communicate is a 5G NR radio access network (RAN) 120. However, 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 al so 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.
[0020] The 5G NR RAN 120 may be portions o f 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. 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. ) .
[0021] 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) .
[0022] The network arrangement 100 al so 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.
[0023] 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, one or more antenna panels, etc.
[0024] The processor 205 may be configured to execute a plurality of engines for the UE 110. For example, the engines may include a carrier switching engine 235 for performing operations related to processing a switching pattern configuration from the network, switching between carriers that share a common Tx / Rx chain and performing Tx or Rx operations with the network on the carriers. These and other example operations are described in further detail below.
[0025] The above referenced engine being an application (e.g., a program) executed by the processor 205 is only an 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.
[0026] 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.
[0027] The transceiver 225 may be a hardware component configured to establish a connection with the 5G-NR RAN 120. 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. The transceiver 225 may include the single Tx / Rx chain that is used for the multiple carriers.
[0028] Fig. 6 shows an example base station 600 according to various example embodiments. The base station 600 may represent the base station 120A or any other type of access node through which the UE 110 may establish a connection and manage network operations. As used herein, the term “base station” may also refer to an “access node, ” “access point, ” or the like and may describe equipment that provides the radio baseband functions for data and / or voice connectivity between a network and one or more users. These base stations and access nodes may be referred to as BS, gNBs, RAN nodes, eNBs, NodeBs, RSUs, TRxPs or TRPs, and so forth, and may comprise ground stations (e.g., terrestrial access points) or satellite stations providing coverage within a geographic area (e.g., a cell) .
[0029] The base station 600 may include a processor 605, a memory arrangement 610, an input / output (I / O) device 620, a transceiver 630, and other components 625. The other components 625 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 600 to other electronic devices and / or power sources, TxRUs, transceiver chains, antenna elements, antenna panels, etc.
[0030] The processor 605 may be configured to execute a plurality of engines of the base station 600. For example, the engines may include a carrier switch configuration engine 635 that may perform operations related to configuring a UE for switching between carriers in a CA band combination. These operations may include, but are not limited to, processing UE capability information related to a Tx / Rx chain of the UE, configuring the UE with band combinations for carrier aggregation, and configuring the UE with a switching pattern to switch between the carriers of the CA band combination. These and other operations will be described in greater detail below.
[0031] The above noted engine 635 being an application (e.g., a program) executed by the processor 605 is only an example. The functionality associated with the engine 635 may also be represented as a separate incorporated component of the base station 600 or may be a modular component coupled to the base station 600, 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. In addition, in some base stations, the functionality described for the processor 605 is split among a plurality of processors (e.g., a baseband processor, an applications processor, etc. ) . The example embodiments may be implemented in any of these or other configurations of a base station.
[0032] The memory 610 may be a hardware component configured to store data related to operations performed by the base station 600. The I / O device 620 may be a hardware component or ports that enable a user to interact with the base station 600.
[0033] The transceiver 630 may be a hardware component configured to exchange data with the UE 110 and any other UEs in the network arrangement 100. The transceiver 630 may operate on a variety of different frequencies or channels (e.g., set of consecutive frequencies) . Therefore, the transceiver 630 may include one or more components (e.g., radios) to enable the data exchange with the various networks and UEs. The transceiver 630 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 605 may be operably coupled to the transceiver 630 and configured to receive from and / or transmit signals to the transceiver 630. The processor 605 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.
[0034] 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. In some example embodiments, this network configuration may include a switching pattern to allow the UE to switch between carriers using the single Tx / Rx chain. Some example switching patterns and manners of signaling the switching pattern configuration to the UE are described with reference to Figs. 3A-B.
[0035] Fig. 3A shows an example cyclic switching pattern diagram 300 between carriers after time durations equal to a time “t” according to various example embodiments. In the switching diagram 300, there are two carriers 305 and 305a corresponding to two separate channels on which a UE may transmit or receive signals. The UE (e.g., UE 110) may be a low-complexity UE such that the UE has a common Rx / Tx chain for receiving and transmitting signals. While Fig. 3A depicts only two carriers, as described above, the example embodiments may be applied to more than two carriers that share a single Rx / Tx chain or multiple Tx / Rx chains within a single UE that each correspond to multiple carriers.
[0036] The UE 110 may be configured with the switching pattern by the network. For example, an information element (IE) of a radio resource control (RRC) configuration may indicate the cyclic pattern for switching between the carriers 305 and 305a and a corresponding duration for each of the carriers 305 and 305a. The IE may include, for example, an identification of a first carrier (e.g., carrier 305) , an identification of a second carrier (e.g., carrier 305a) and the duration for the switch. The duration may be signaled in symbols or slots. In some examples, if the first and second carrier have different numerologies, then the time unit may be determined based on the minimum of the two subcarrier spacing (SCS) . Other types of signaling may also be used to configure the UE 110 with the switching pattern, e.g., Medium Access Control (MAC) signaling, Downlink Control Information (DCI) signaling, etc.
[0037] In the example of a Fig. 3A, the UE 110 may be signaled with a single time duration. This configures the UE 110 to switch between the first carrier and the second carrier at a same interval of time as described below. In the example of Fig. 3A, the UE 110 may be transmitting on the first carrier 305 and receiving on the second carrier 305a but this is only an example.
[0038] At occasion 310, the Tx / Rx chain of the UE 110 is tuned to frequency of the carrier 305 and the UE 110 may perform Tx operations using the carrier 305 during the duration of the occasion 310. During the occasion 310a, the UE 110 is not expected to receive any signals from the network on carrier 305a. As described above, the length (or duration) “t” of the occasion 310 may be signaled to the UE 110 (e.g., via an RRC IE) and may be signaled as a number of symbols or slots. When the duration expires at time 315, the UE 110 may switch to tune the Tx / Rx chain to the carrier 305a. The UE 110 may remain tuned to the carrier 305a for the duration of occasion 320a to perform Rx operations for signals transmitted by the network. During the occasion 320, the UE 110 is not expected to transmit any signals to the network on carrier 305. As described above, in this example, the UE 110 may be signaled a single time value meaning that the occasions 310 and 320a have the same duration.
[0039] In the example of Fig. 3A, the switching is shown to be instantaneous, e.g., there is no gap between the occasion 310 and occasion 320a. This is only for purposes of illustration. In an actual UE, there may be a small amount of time (e.g., a switching that is described in greater detail below) where the UE is tuning the Tx / Rx chain to the different frequency and switching from Rx to Tx operations or vice versa.
[0040] To complete Fig. 3A, at a time 325, the UE 110 may switch the Tx / Rx chain to the frequency of the carrier 305 for the UE 110 to perform Tx operations during the occasion 330 and no Rx operations during the occasion 330a. Similarly, at a time 335, the UE 110 may switch the Tx / Rx chain to the frequency of the carrier 305a for the UE 110 to perform Rx operations during the occasion 340a and no Tx operations during the occasion 340.
[0041] The switching pattern depicted in Fig. 3A may be followed until the UE 110 receives an RRC reconfiguration that indicates a different switching pattern or that the UE 110 is no longer configured with a switching pattern.
[0042] Fig. 3B shows an example cyclic switching pattern diagram 350 between carriers after time durations equal to times “t1” and “t2” according to various example embodiments. Similar to Fig. 3A, the UE 110 may be signaled the configuration for the switching diagram 350 (e.g., using an RRC IE) that includes the first carrier 355, the second carrier 355a and a time duration for the switch between the carriers. However, the switching depicted in Fig. 3B depicts switching gaps that are not equal as those of Fig. 3A, e.g., the occasions 310 / 310a, 320 / 320a, etc. were equal to a time “t. ” In the switching diagram 350, the configuration may include two durations, e.g., a first duration corresponding to the first carrier 355 and a second duration corresponding to the second carrier 355a.
[0043] In the example of a Fig. 3B, the UE 110 may be signaled with the two time durations, e.g., “t1” and “t2” . In the example, the time duration ” t1” corresponds to the carrier 355 and the time duration ” t2” corresponds to the carrier 355a. Also, in the example, the time duration ” t1” is longer than the time duration ” t2” . However, this is only an example and time duration ” t2” may be longer than time duration ” t1” . In the example of Fig. 3B, the UE 110 may be transmitting on the first carrier 355 and receiving on the second carrier 355a but this is only an example and the Tx / Rx operations may be reversed.
[0044] At occasion 360, the Tx / Rx chain of the UE 110 is tuned to frequency of the carrier 355 and the UE 110 may perform Tx operations using the carrier 355 during the duration of the occasion 360. During the occasion 360a, the UE 110 is not expected to receive any signals from the network on carrier 355a. As described above, the length (or duration) “t1” of the occasion 360 may be signaled to the UE 110 (e.g., via an RRC IE) and may be signaled as a number of symbols or slots. When the time duration “t1” expires at time 365, the UE 110 may switch to tune the Tx / Rx chain to the carrier 355a. The UE 110 may remain tuned to the carrier 355a for the duration of occasion 370a to perform Rx operations for signals transmitted by the network. During the occasion 370, the UE 110 is not expected to transmit any signals to the network on carrier 355. As described above, the length (or duration) “t2” of the occasion 370a may be signaled to the UE 110 (e.g., via an RRC IE) and may be signaled as a number of symbols or slots.
[0045] To complete Fig. 3B, at a time 375 when the time duration “t2” expires, the UE 110 may switch the Tx / Rx chain to the frequency of the carrier 355 for the UE 110 to perform Tx operations during the occasion 380 for the time duration “t1” and the UE is not expected to perform Rx operations during the occasion 380a. Similarly, at a time 385 when the time duration “t2” expires, the UE 110 may switch the Tx / Rx chain to the frequency of the carrier 355a for the UE 110 to perform Rx operations during the occasion 390a for the time duration “t2” and the UE is not expected to perform Tx operations during the occasion 390.
[0046] The switching pattern depicted in Fig. 3B may be followed until the UE 110 receives an RRC reconfiguration that indicates a different switching pattern or that the UE 110 is no longer configured with a switching pattern.
[0047] As described above, the UE 110 may have a switching gap, e.g., the time it takes the UE 110 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 110 may report this switching gap capability to the network, e.g., in a UE capability report.
[0048] The UE 110 may consider the switching gap when performing the initial switch. For example, when the UE 110 is initially configured with the RRC signaling semi-static switching pattern, the first switch may be applied no earlier than the switching gap duration from the end of an uplink (UL) transmission that carries an acknowledgement (ACK) corresponding to a Physical Downlink Shared Channel (PDSCH) in which the RRC-based switching pattern is transmitted to the UE 110. These example embodiments are described in greater detail with reference to Fig. 4.
[0049] Fig. 4 shows an example initial switching gap diagram 400 for a UE configured with a semi-static switching pattern according to various example embodiments. The switching diagram 400 depicts a first carrier 405 and a second carrier 405a. In occasion 410, the UE 110 may receive a PDSCH transmission on carrier 405 that includes an RRC configuration with a semi-static switching pattern, e.g., the switching patterns described with reference to Figs. 3A-B. Thus, the UE 110 receives the switching pattern during occasion 410 including the information for the switching pattern, e.g., the carriers 405 and 405a, the durations, etc. The UE 110 may now determine when to apply the switching pattern. As described above, the UE 110 may consider various factors for when to apply the initial switch from the carrier 405 to the carrier 405a. This may include the switching gap, when an ACK is sent corresponding to the PDSCH including the switching gap pattern, etc.
[0050] In occasion 420, a physical uplink control channel (PUCCH) transmission may be transmitted by the UE 110 via the carrier 405 that includes an ACK corresponding to the PDSCH including the switching pattern. As described above, the UE 110 may apply the first switch from carrier 405 to carrier 405a no earlier than the switching gap duration from the end the ACK in the PUCCH.
[0051] Thus, after the PUCCH 420 is transmitted, the UE 110 may wait at least the duration of the switching gap to switch between the carriers 405 and 405a, e.g., from time 425 when the PUCCH transmission ends until time 435 that is the duration of the switching gap as shown by 430 / 430a. Thus, when time 435 occurs, the UE 110 may apply the initial switch from the carrier 405 to the carrier 405a and perform Rx operations on carrier 405a during the occasion 440a.
[0052] The above example embodiments considered the initial switching between carriers based on a configured switching pattern and a switching gap capability of a UE. The following example embodiments consider the switching between carriers based on a configured switching pattern and a switching gap capability of a UE for subsequent switches after the initial switch. In these example embodiments, the switching gap may immediately precede the starting time from which Tx / Rx on the new carrier may be applied. These example embodiments are described in greater detail with reference to Fig. 5.
[0053] Fig. 5 shows an example switching diagram 500 for a subsequent switching between carriers after an initial switch according to various example embodiments. The switching diagram 500 depicts a carrier 505 and a carrier 505a. The switching diagram 500 depicts a switch between carriers after the switches of switching diagram 400 have already been performed. Thus, the timeline in Fig. 5 considers that the initial switch has already been performed. For example, at the time depicted at the far left of the switching diagram 500, the UE 110 currently have the Tx / Rx chain tuned to the carrier 505a.
[0054] Thus, the UE 110 may be configured to switch to the carrier 505 for the occasion 520. However, the UE 110 may start the process of switching from the carrier 505a to the carrier 505 at any time from the far left of the switching diagram 500 because there are no scheduled Rx operations on the carrier 505a from the far left through the occasion 520a. However, as described above, in these example embodiments, the UE 110 will wait to initiate the switch until a time that immediately precedes the starting time from which Tx / Rx on the new carrier may be applied, e.g., the time when occasion 520 starts minus the value of the switching gap. In the example of Fig. 5, the UE 110 begins the process of the switch from the carrier 505a to carrier 505 at the start of the switching gap 515 such that the switch is complete by the start of the occasion 520 where the UE 110 may perform Tx / Rx operations using the carrier 505.
[0055] By defining when the UE 110 may begin the switching process, this may allow the network to perform aperiodic scheduling for the UE 110. For example, while the UE 110 is not currently scheduled to receive any DL transmissions via the carrier 505a during the occasion 510, the network may understand that the UE 110 is available to receive DL transmissions during this time and may aperiodically schedule the UE 110 to receive DL transmissions using the carrier 505a during the occasion 510.
[0056] The UE 110 may perform Tx or Rx operations using the carrier 505 during the occasion 520 and then wait to switch to the carrier 505a by the occasion 535a. Again, there is a time 525 where the UE 110 is not currently scheduled to perform any Tx / Rx operations using the carrier 505. However, the UE 110 may wait to initiate the switch from the carrier 505 to the carrier 505a until a time that immediately precedes the starting time of the occasion 535a. Thus, in the example of Fig. 5, the UE 110 begins the process of the switch from the carrier 505 to carrier 505a at the start of the switching gap 530a such that the switch is complete by the start of the occasion 535a where the UE 110 may perform Rx operations using the carrier 505a. Again, this may allow the network to schedule Tx / Rx operations using the carrier 505 during the time 525.
[0057] When a UE is configured with the switching pattern (s) , the UE may be subject to various scheduling restrictions. In a first example, the UE may not be expected to be scheduled with any uplink transmission or downlink reception during the entire duration of a switching gap.
[0058] In a second example of a scheduling restriction that may apply to the configured switching patterns, the UE may receive a scheduling downlink control information (DCI) such that the scheduling is on the same carrier as triggered by a semi-static RRC pattern. In this instance, the UE is not expected to transmit or receive on a first carrier for the indicated slots or symbols if the RRC pattern is triggered on a second carrier on those same indicated s lots or symbol s. This scheduling restriction essentially means that the DCI will not override the switching pattern. I f the network wants to override the configured switching pattern, the network may use an RRC reconfiguration to change the switching pattern or cause the UE to not use a switching pattern.
[0059] In a third example of a scheduling restriction that may apply to the configured switching patterns, the UE may receive a scheduling DCI such that the scheduling is on the different carrier than the carrier triggered by the semi-static RRC pattern. In such a case, the switching is then expected to be cancelled or interrupted, e.g., the opposite of the second example of scheduling restrictions. In one option, when the DCI interrupts the switching pattern, the UE may expect to be RRC reconfigured with a new switching pattern. In one option, when the DCI interrupts the switching pattern, the UE may skip the switching for that instance (e.g., the instance that conflicts with the DCI scheduling) but otherwise may continue to follow the interrupted switching pattern until the UE is RRC reconfigured.Examples
[0060] In a first example, a method, comprising processing, based on signaling from a network, a switching pattern configuration comprising information related to a switching pattern, the information including an identification of a first carrier, an identification of a second carrier and a duration associated with the switching pattern, determining, based on the switching pattern, to tune a transmission / reception (Tx / Rx) chain to one of the first carrier or the second carrier and performing Tx or Rx operations using the one of the first carrier or the second carrier.
[0061] In a second example, the method of the first example, wherein the duration indicates a period of time during which the Tx / Rx chain is tuned to the one of the first carrier and the second carrier.
[0062] In a third example, the method of the second example, further comprising determining, when the duration expires, to tune the Tx / Rx chain to the other one of the first carrier or the second carrier.
[0063] In a fourth example, the method of the second example, wherein the duration comprises a single duration that is applied to the first carrier and second carrier.
[0064] In a fifth example, the method of the second example, wherein the duration comprises a first duration that is applied to the first carrier and a second duration that is applied to the second carrier.
[0065] In a sixth example, the method of the second example, wherein the duration is provided in units of symbols or s lots.
[0066] In a seventh example, the method of the first example, wherein the switching pattern configuration is received via radio resource control (RRC) signaling.
[0067] In an eighth example, the method of the first example, further comprising generating, for transmission to the network, capability information comprising a switching gap duration, wherein the switching gap duration is a time during which the Tx / Rx chain is tuned to the first carrier or the second carrier.
[0068] In a ninth example, the method of the eighth example, wherein an initial switch from the first carrier to the second carrier is applied no earlier than a time when a transmission of an acknowledgment (ACK) corresponding to the switching pattern configuration is completed using the first carrier plus the a switching gap duration.
[0069] In a tenth example, the method of the eighth example, wherein the switching gap duration occurs immediately prior to a start time of the Tx or Rx operations using the one of the first carrier or the second carrier.
[0070] In an eleventh example, the method of the eighth example, wherein there are no scheduled uplink transmissions or downlink receptions for the apparatus during the switching gap duration.
[0071] In a twelfth example, the method of the first example, further comprising processing, based on signaling from the network, Downlink Control Information (DCI) scheduling information, wherein the DCI scheduling information conflicts with the switching pattern configuration.
[0072] In a thirteenth example, the method of the twelfth example, wherein the DCI scheduling information is ignored.
[0073] In a fourteenth example, the method of the twelfth example, further comprising performing operations related to the DCI scheduling information.
[0074] In a fifteenth example, the method of the fourteenth example, further comprising processing, based on signaling from the network, a second switching pattern configuration comprising information related to a second switching pattern to be applied after the operations related to the DCI scheduling information are performed.
[0075] In a sixteenth example, the method of the fourteenth example, wherein the switching pattern configuration is reapplied after the operations related to the DCI scheduling information are performed.
[0076] In a seventeenth example, the method of the first example, further comprising generating, for transmission to the network, capability information related to a number of Tx / Rx chains.
[0077] In an eighteenth example, the method of the first example, further comprising generating, for transmission to the network, capability information related to switching between the first carrier and the second carrier, wherein the switching pattern is based on the capability information.
[0078] In a nineteenth example, a processor configured to perform any of the methods of the first through eighteenth examples.
[0079] In a twentieth example, a user equipment (UE) configured to perform any of the methods of the first through eighteenth examples.
[0080] 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.
[0081] 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.
[0082] 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.
[0083] 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 information related to a switching pattern, the information including an identification of a first carrier, an identification of a second carrier and a duration associated with the switching pattern;determine, based on the switching pattern, to tune a transmission / reception (Tx / Rx) chain to one of the first carrier or the second carrier; andperform Tx or Rx operations using the one of the first carrier or the second carrier.2.The apparatus of claim 1, wherein the duration indicates a period of time during which the Tx / Rx chain is tuned to the one of the first carrier and the second carrier.3.The apparatus of claim 2, wherein the processing circuitry is further configured to:determine, when the duration expires, to tune the Tx / Rx chain to the other one of the first carrier or the second carrier.4.The apparatus of claim 2, wherein the duration comprises a single duration that is applied to the first carrier and second carrier.5.The apparatus of claim 2, wherein the duration comprises a first duration that is applied to the first carrier and a second duration that is applied to the second carrier.6.The apparatus of claim 2, wherein the duration is provided in units of symbols or slots.7.The apparatus of claim 1, wherein the switching pattern configuration is received via radio resource control (RRC) signaling.8.The apparatus of claim 1, wherein the processing circuitry is further configured to:generate, for transmission to the network, capability information comprising a switching gap duration, wherein the switching gap duration is a time during which the Tx / Rx chain is tuned to the first carrier or the second carrier.9.The apparatus of claim 8, wherein an initial switch from the first carrier to the second carrier is applied no earlier than a time when a transmission of an acknowledgment (ACK) corresponding to the switching pattern configuration is completed using the first carrier plus the a switching gap duration.10.The apparatus of claim 8, wherein the switching gap duration occurs immediately prior to a start time of the Tx or Rx operations using the one of the first carrier or the second carrier.11.The apparatus of claim 8, wherein there are no scheduled uplink transmissions or downlink receptions for the apparatus during the switching gap duration.12.The apparatus of claim 1, wherein the proces sing circuitry is further configured to:process, based on s ignal ing from the network, Downlink Control Information (DCI) s cheduling information, wherein the DCI scheduling information confl icts with the switching pattern configuration.13.The apparatus of claim 12, wherein the DCI s cheduling information is ignored.14.The apparatus of claim 12, wherein the processing circuitry is further configured to:perform operations related to the DCI scheduling information.15.The apparatus of claim 14, wherein the processing circuitry is further configured to:process, based on s ignal ing from the network, a second switching pattern configuration comprising information related to a second switching pattern to be appl ied after the operations related to the DCI scheduling information are performed.16.The apparatus of claim 14, wherein the switching pattern configuration is reappl ied after the operations related to the DCI scheduling information are performed.17.The apparatus of claim 1, wherein the proces sing circuitry is further configured to:generate, for transmis sion to the network, capability information related to a number of Tx / Rx chains.18.The apparatus of claim 1, wherein the proces sing circuitry is further configured to:generate, for transmis sion to the network, capability information related to switching between the first carrier and the second carrier, wherein the switching pattern is based on the capability information.