CN112970307B - Method, apparatus and computer readable medium for scheduling serving cells - Google Patents
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Abstract
Embodiments of the present disclosure provide a method, apparatus, and computer readable medium for scheduling serving cells. According to embodiments of the present disclosure, non-zero size BWP is used in combination with zero RA to achieve cell deactivation taking into account the Scell's previous active/deactivated state. The terminal device behavior also depends on the cell type and its state. In this way, overhead is reduced.
Description
Technical Field
Embodiments of the present disclosure relate generally to communication technology and, more particularly, relate to a method, apparatus, and computer readable medium for scheduling serving cells.
Background
In recent communication technologies, carrier Aggregation (CA) has been proposed to increase the capacity of a communication system. In the CA scenario, there are different types of cells, e.g. a primary cell and a secondary cell. The cell needs to be activated/deactivated. However, there is a need to reduce delays in activation, deactivation and configuration of serving cells.
Disclosure of Invention
In general, embodiments of the present disclosure relate to a method for scheduling a serving cell and a corresponding communication device.
In a first aspect, embodiments of the present disclosure provide an apparatus. The apparatus includes: at least one processor; and a memory coupled to the at least one processor, the memory having instructions stored therein that, when executed by the at least one processor, cause the apparatus to: downlink Control Information (DCI) is received at a terminal device from a network device. The apparatus is also caused to extract a set of information elements from the DCI, the set of information elements including an index related to the serving cell and a resource allocation of a bandwidth portion of the serving cell. The apparatus is also caused to determine a manner for responding to the received DCI by comparing the set of information elements to respective predefined values. The method comprises at least one of the following steps: data transmission or data reception is performed on the bandwidth part of the serving cell, downlink measurements are performed on the bandwidth part of the serving cell, and the serving cell is deactivated.
In a second aspect, embodiments of the present disclosure provide a method. The method comprises the following steps: downlink Control Information (DCI) is received at a terminal device from a network device. The method also includes extracting a set of information elements from the DCI, the set of information elements including an index related to the serving cell and a resource allocation of a bandwidth portion of the serving cell. The method further comprises the steps of: determining a means for responding to the received DCI by comparing the set of information elements to respective predefined values, including at least one of: data transmission or data reception is performed on the bandwidth part of the serving cell, downlink measurements are performed on the bandwidth part of the serving cell, and the serving cell is deactivated.
In a third aspect, embodiments of the present disclosure provide an access device. The apparatus includes means for receiving Downlink Control Information (DCI) from a network device at a terminal device. The apparatus also includes means for extracting a set of information elements from the DCI, the set of information elements including an index of a bandwidth portion of the serving cell and a resource allocation of the bandwidth portion. The apparatus also includes means for determining a comparison for responding to the received DCI by comparing the set of information elements to respective predefined values. The method comprises at least one of the following steps: data transmission or data reception is performed on the bandwidth part of the serving cell, downlink measurements are performed on the bandwidth part of the serving cell, and the serving cell is deactivated.
Other features and advantages of embodiments of the present disclosure will be apparent from the following description of the particular embodiments, when read in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the embodiments of the disclosure.
Drawings
Embodiments of the present disclosure are presented by way of example and their advantages are explained in more detail below with reference to the drawings, in which
Fig. 1 shows a schematic diagram of a communication system according to an embodiment of the present disclosure;
fig. 2 illustrates a flow chart of a method implemented at a communication device according to an embodiment of the disclosure;
fig. 3 illustrates a flow chart of a method implemented at a communication device according to an embodiment of the disclosure; and
fig. 4 shows a schematic diagram of an apparatus according to an embodiment of the present disclosure.
The same or similar reference numbers will be used throughout the drawings to refer to the same or like elements.
Detailed Description
The subject matter described herein will now be discussed with reference to several example embodiments. It should be understood that these embodiments are discussed only for the purpose of enabling those skilled in the art to better understand and thus achieve the subject matter described herein, and do not set forth any limitation on the scope of the subject matter.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be noted that in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two functions or acts illustrated in succession may, in fact, be executed concurrently, or the acts may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
As used herein, the term "communication network" refers to a network that conforms to any suitable communication standard, such as Long Term Evolution (LTE), LTE-advanced (LTE-a), wideband Code Division Multiple Access (WCDMA), high Speed Packet Access (HSPA), and the like. Furthermore, the communication between the terminal device and the network device in the communication network may be performed according to any suitable generation communication protocol, including, but not limited to, a first generation (1G), a second generation (2G), 2.5G, 2.75G, a third generation (3G), a fourth generation (4G), 4.5G, a future fifth generation (5G) communication protocol, and/or any other protocol currently known or to be developed in the future.
Embodiments of the present disclosure may be applied in various communication systems. In view of the rapid development of communications, there will, of course, also be future types of communication technologies and systems that may embody the present disclosure. The scope of the present disclosure should not be limited to only the above-described systems. For purposes of illustration, embodiments of the present disclosure will be described with reference to a 5G communication system.
The term "network device" as used herein includes, but is not limited to, a Base Station (BS), gateway, registration management entity, and other suitable devices in a communication system. The term "base station" or "BS" means a node B (NodeB or NB), an evolved NodeB (eNodeB or eNB), an NR NB (also known as a gNB), a Remote Radio Unit (RRU), a Radio Header (RH), a Remote Radio Head (RRH), a relay, a low power node (e.g., femto, pico, etc.).
The term "terminal device" as used herein includes, but is not limited to, "User Equipment (UE)" and other suitable terminal devices capable of communicating with a network device. For example, a "terminal device" may refer to a terminal, mobile Terminal (MT), subscriber Station (SS), portable subscriber station, mobile Station (MS), or Access Terminal (AT).
The term "circuitry" as used herein may refer to one or more or all of the following:
(a) Pure hardware circuit implementations (such as implementations in analog and/or digital circuitry only), and
(b) A combination of hardware circuitry and software, such as (as applicable):
(i) Combination of analog and/or digital hardware circuitry and software/firmware
(ii) A hardware processor (including a digital signal processor) having software, any portion of the software and memory that work together to cause a device such as a mobile phone or server to perform various functions, and
(c) Software (e.g., firmware) is required to operate but may not exist as hardware circuitry and/or a processor, such as a microprocessor or portion of a microprocessor, when operation is not required.
This definition of "circuitry" applies to all uses of this term in this application, including in any claims. As another example, as used in this application, the term "circuitry" also encompasses only hardware circuitry or processor (or multiple processors) or an implementation of hardware circuitry or processor and a portion of its (or their) accompanying software and/or firmware. The term "circuitry" also encompasses, for example and where applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device, or a similar integrated circuit in a server, cellular network device, or other computing or network device. .
The term "bandwidth part (BWP)" as used herein refers to a contiguous set of physical resource blocks selected from a contiguous subset of common resource blocks for a given digital basic configuration (numerology) on a given carrier. For example, up to 4 BWP may be specified in DL and UL.
In Downlink (DL) communications, a terminal device may be configured with up to four carrier bandwidth portions. The bandwidth of each BWP should be equal to or greater than the Synchronization Signal Block (SSB) bandwidth, but may or may not contain SSB. Only one carrier bandwidth portion may be active at a given time. Each DL BWP comprises at least one CORESET with a UE-specific search space (USS). The terminal device is expected not to receive a Physical Downlink Shared Channel (PDSCH), a Physical Downlink Control Channel (PDCCH), a channel state information reference signal (CSI-RS), or a Tracking Reference Signal (TRS) outside of the active bandwidth portion. In the primary carrier, at least one configured DL BWP comprises one CORESET with a Common Search Space (CSS).
In Uplink (UL) communications, a terminal device may be configured with up to four carrier bandwidth portions. Only one carrier bandwidth portion may be active at a given time. If the terminal device is configured with a supplementary uplink, the terminal device may additionally be configured with up to four carrier bandwidth parts in the supplementary uplink. The terminal device must not transmit a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH) outside the active bandwidth part.
In the recent RAN conference, a proposal was approved to enhance the Carrier Aggregation (CA) and Dual Connectivity (DC) functions of the New Radio (NR) version 15. One of the goals is to study and clarify the potential solutions for fast serving cell (Scell) and BWP activation/deactivation, which includes RAN1 enhancements in the connected mode of CA.
One potential solution to reduce the activation delay of scells is to use Downlink Control Information (DCI). In NR version 15, the Medium Access Control (MAC) Control Element (CE) is still used to activate/deactivate Scell.
One type of layer 1 (L1) signaling is proposed to activate/schedule multiple serving cells with one single DCI. The main benefit is that the activation and scheduling functions of a plurality of serving cells can be realized simultaneously. It is clear that the overall L1 signaling overhead is low and these configured serving cells cannot be activated and scheduled simultaneously. On the other hand, using the multi-serving cell DCI format for single-cell scheduling would be inefficient. The activation and scheduling information elements of the serving cell will create unnecessary overhead.
As described above, MAC CE is a way to activate/deactivate scells to trade off between fast signaling transmission and signaling accuracy. And, a separate DCI is used to schedule scells for data transmission. But in the NR phase this solution has proven to be not efficient because the L2 signalling transmission delay is long, e.g. due to multiple HARQ retransmissions, and thus the time delay for subsequent data transmissions is long. The Scell activation/deactivation solution based on L1 signaling was studied to achieve the goal of fast data transmission.
However, it is disclosed how to design a detailed LI signaling format for this purpose, how to combine the serving cell operation with the corresponding BWP operation for fast data transmission. Furthermore, the activation and scheduling information elements of the serving cell will create unnecessary overhead. Therefore, it would be beneficial for a UE to monitor a light (light) single cell scheduling DCI format to enable efficient optical traffic scheduling.
Also, as described above, it has been proposed to activate and schedule multiple serving cells by a single L1 signaling with a target to save the total L1 signaling overhead. However, this may result in unnecessary overhead when the gNB only needs to schedule data on one serving cell for sporadic traffic. Another problem is that the active/inactive states of all configured serving cells should always be explicitly included in the DCI, even if one of the states changes while the other states remain unchanged. This will lead to redundant DL signaling and to some extent affect efficiency.
Therefore, it is necessary to design an efficient DCI format to schedule and activate a single serving cell through a single DCI. According to embodiments of the present disclosure, non-zero size BWP is used in combination with zero RA to achieve cell deactivation taking into account the Scell's previous active/deactivated state. The terminal device behavior also depends on the cell type and its state. In this way, overhead is reduced.
Fig. 1 illustrates a schematic diagram of a communication system 100 in which embodiments of the present disclosure may be implemented. The communication system 100, which is part of a communication network, includes terminal devices 110-1, 110-2, … …, 110-N (collectively, "terminal devices 110", where N is an integer), a network 120. It should be noted that communication system 100 may also include other elements that have been omitted for clarity. Network device 120 may communicate with terminal device 110. It should be understood that the number of terminal devices and network devices shown in fig. 1 is given for illustrative purposes and is not meant to be limiting. Communication system 100 may include any suitable number of network devices and terminal devices. As shown in fig. 1, in communication system 100, there are different cells (cells 130-1, 130-2, … …, 130-M, where M is a suitable integer). Cells may include, for example, a primary cell (PCell) and a secondary cell (SCell).
Communication in communication system 100 may be implemented in accordance with any suitable communication protocol including, but not limited to, first generation (1G), second generation (2G), third generation (3G), fourth generation (4G), fifth generation (5G), etc. cellular communication protocols, wireless local area network communication protocols such as Institute of Electrical and Electronics Engineers (IEEE) 802.11, and/or any other protocols currently known or developed in the future. Moreover, the communication may utilize any suitable wireless communication technology, including, but not limited to: code Division Multiple Access (CDMA), frequency Division Multiple Access (FDMA), time Division Multiple Access (TDMA), frequency Division Duplex (FDD), time Division Duplex (TDD), multiple Input Multiple Output (MIMO), orthogonal Frequency Division Multiple Access (OFDMA), and/or any other technique currently known or developed in the future.
Fig. 2 shows a flow chart of a method 200 according to an embodiment of the present disclosure. The method 200 may be implemented at any suitable terminal device. For illustrative purposes only, the method 200 is described as being implemented at the terminal device 110-1.
At block 210, terminal device 110-1 receives DCI from network device 120. DCI is transmitted in PDCCH. The DCI is L1 signaling for simultaneously activating and scheduling a single serving cell. For example, terminal device 110-1 may monitor DCI on an active serving cell configured with PDCCH resources.
In some embodiments, the network device 120 transmits L1 signaling in the corresponding active BWP of any active serving cell to implicitly activate/deactivate the serving cell, and/or to switch/schedule the corresponding BWP of the serving cell. In some embodiments, network device 120 may transmit DCI at each transmission time interval.
At block 220, terminal device 110-1 extracts a set of information elements from the DCI. The set of information elements includes an index related to the serving cell. In some embodiments, the index may be an index of a bandwidth portion (BWP). For example, the index may indicate which BWP is active, i.e. to be used by the terminal device 110-1. In some embodiments, the information element may include a 2-bit BWP identification. In other embodiments, the index may also include an identification of the serving cell, e.g., a 3-bit Carrier Indicator Field (CIF).
The set of information elements further includes resource allocations for BWP. In some embodiments, the information element may explicitly identify the allocated radio resources for data transmission or reception. For example, the resource allocation may refer to Physical Resource Blocks (PRBs) allocated for BWP.
At block 230, terminal device 110-1 determines a manner for responding to the received DCI by comparing the set of information elements to respective predefined values. In some embodiments, the predefined value may be preconfigured to the terminal device 110-1. Alternatively, the predefined value may be configured by network device 120 to terminal device 110-1 via higher layer signaling. Fig. 3 illustrates a flow chart of a method 300 for determining a manner according to some embodiments of the present disclosure. For illustrative purposes only, embodiments of the present disclosure are described with reference to fig. 3. It should be noted that method 300 is merely an example.
At block 310, terminal device 110-1 determines an identification of a serving cell associated with the DCI. For example, terminal device 110-1 may extract the identity of the serving cell from the CIF field of the DCI. In some embodiments, terminal device 110-1 may also determine the state of the serving cell. For example, terminal device 110-1 may determine whether the serving cell is an active cell or a deactivated cell. If the serving cell is a deactivation cell, terminal device 110-1 may determine that network device 120 needs to activate the cell.
In some other embodiments, if the serving cell is an active cell, the terminal device 110-1 may further determine whether the serving cell is a primary cell or a secondary cell. For example, the terminal device 110-1 may store the identity of the primary cell, and after creation of the secondary cell, the identity of the secondary cell is also stored in the terminal device 110-1.
At block 320, the terminal device 110-1 compares the resource allocation from the information element with a first predefined value. For example, the first predefined value may be "0000" or "1111". If the resource allocation does not match the first predefined value and is a valid resource allocation value, the terminal device 110-1 may determine that data transmission or reception may be performed on the BWP indicated by the index in the serving cell and, at block 330, the terminal device 110-1 performs data transmission or data reception based on the DCI. In some embodiments, the terminal device 110-1 may also compare the index of bandwidth to a second predefined value. If the index matches the second predefined value, the terminal device 110-1 may treat the DCI as valid DCI and perform data transmission or data reception on BWP using the index.
By way of example only, as described above, the terminal device 110-1 may determine the type of serving cell. If the serving cell is a primary cell, the terminal device 110-1 may activate or switch the BWP indicated by the index of the BWP. If the resource allocation does not match the first predefined value, the terminal device 110-1 may perform downlink data reception or uplink data transmission operations on the active BWP of the serving cell.
If the resource allocation matches the first predefined value, then at block 340, the terminal device 110-1 compares the index to the second predefined value. For example, the second predefined value may be "00". If the index does not match the second predefined value, terminal device 110-1 may activate/switch BWP based on the index and determine that the corresponding BWP is not scheduled for any data transmission, and at block 350, terminal device 110-1 performs downlink measurements. For example, downlink measurements may be used for Channel State Information (CSI). Alternatively or additionally, downlink measurements may be used for mobility management. Alternatively, the terminal device 110-1 may transmit a Sounding Reference Signal (SRS) for measurement purposes. As described above, in some embodiments, the index may also include CIF.
If the index matches the second predefined value, terminal device 110-1 deactivates the serving cell at block 360. In some embodiments, if the serving cell is the primary cell, the terminal device 110-1 may first switch the serving cell to the configured default BWP and start the corresponding default timer of the serving cell. The terminal device 110-1 may stop monitoring the DL DCI and stop the preconfigured DL measurements on the serving cell until the default timer expires. In some embodiments, terminal device 110-1 may automatically deactivate all active secondary cells. In this way, power is saved for terminal device 110-1. For example, if the index is a BWP identity matching the second predefined value "00", the terminal device 110-1 deactivates the serving cell. In other embodiments, the index is a CIF that matches a second predefined value of "000", and terminal device 110-1 deactivates the serving cell. It should be noted that the second predefined value may be any suitable value.
In some embodiments, an apparatus (e.g., terminal device 110-1) for performing method 200 may include respective components for performing corresponding steps in method 200. These components may be implemented in any suitable manner. For example, it may be implemented by circuitry or software modules.
In some embodiments, the apparatus comprises: means for receiving Downlink Control Information (DCI) from a network device at a terminal device; means for extracting a set of information elements from the DCI, the set of information elements including an index of a bandwidth portion of a serving cell and a resource allocation of the bandwidth portion; means for determining a manner for responding to the received DCI by comparing the set of information elements to respective predefined values, comprising at least one of: data transmission or data reception is performed on a bandwidth portion of the serving cell, downlink measurements are performed on a bandwidth portion of the serving cell, or the serving cell is deactivated.
In some embodiments, the means for determining a response means comprises: means for comparing the resource allocation of the bandwidth portion with a first predefined value; and means for performing data transmission or data reception on the bandwidth portion of the serving cell in response to the resource allocation of the bandwidth portion not matching a first predefined value of the set of predefined values.
In some embodiments, the means for determining a response means comprises: means for comparing the resource allocation of the bandwidth portion with a first predefined value; means for determining whether the serving cell is in an active state in response to the resource allocation of the bandwidth portion matching a first predefined value; and means for performing downlink measurements on a bandwidth portion of the serving cell in response to the serving cell being in a deactivated state.
In some embodiments, the means for determining a response means comprises: means for comparing the resource allocation of the bandwidth portion with a first predefined value; means for comparing the index of the bandwidth portion to a second predefined value in response to the resource allocation matching the first predefined value; means for determining whether the serving cell is in an active state in response to the index of the bandwidth portion matching a second predefined value; and means for deactivating the serving cell in response to the serving cell being in an active state.
In some embodiments, the means for determining a response means comprises: means for comparing the resource allocation of the bandwidth portion with a first predefined value; means for comparing the index of the bandwidth portion to a second predefined value in response to the resource allocation matching the first predefined value; and means for performing downlink measurements on the bandwidth portion of the serving cell in response to the index of the bandwidth portion not matching the second predefined value.
In some embodiments, the means for determining a response means comprises: means for comparing the resource allocation of the bandwidth portion with a first predefined value; means for comparing the index of the bandwidth portion to a second predefined value in response to the resource allocation matching the first predefined value; and means for activating the serving cell in response to the index of the bandwidth portion not matching the second predefined value.
In some embodiments, the means for determining a response means comprises: means for comparing the resource allocation of the bandwidth portion with a first predefined value; means for comparing the index of the bandwidth portion to a second predefined value in response to the resource allocation not matching the first predefined value; and means for performing data transmission and reception on the bandwidth portion of the serving cell in response to the index of the bandwidth portion matching a second predefined value of the set of predefined values.
In some embodiments, the DCI further includes an identification of a serving cell, and the apparatus further includes: means for determining a type of the serving cell based on the identification, the type being one of the primary cell or the secondary cell; means for comparing the resource allocation with a first predefined value in response to the serving cell being the primary cell; means for comparing the index to a second predefined value in response to the resource allocation matching the first predefined value; means for switching to the predetermined bandwidth portion in response to the index of the bandwidth portion matching the second predefined value; means for starting a timer of the serving cell; and means for suspending monitoring the DCI until the timer expires.
In some embodiments, the apparatus further comprises: means for determining whether a secondary cell of the serving cell is active; and means for performing data transmission and reception over a bandwidth portion of the serving cell in response to at least one secondary cell activity.
In some embodiments, the apparatus further comprises: means for determining whether a secondary cell of the serving cell is active; and means for deactivating the at least one secondary cell in response to the at least one secondary cell activity.
Fig. 4 is a simplified block diagram of an apparatus 400 suitable for implementing embodiments of the present disclosure. Device 400 may be implemented at registration management entity 430. Device 400 may also be implemented at terminal device 110-1. As shown, device 400 includes one or more processors 410, one or more memories 420 coupled to processor(s) 410, one or more transmitters and/or receivers (TX/RX) 440 coupled to processor(s) 410.
Processor 410 may be of any type suitable to the local technology network and may include, by way of non-limiting example, one or more of a general purpose computer, a special purpose computer, a microprocessor, a Digital Signal Processor (DSP), and a processor based on a multi-core processor architecture. The device 700 may have multiple processors, such as application specific integrated circuit chips, that are slaved in time to a clock that is synchronized to the master processor.
Memory 420 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as non-transitory computer readable storage media, semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory, and removable memory, as non-limiting examples.
Memory 420 stores at least a portion of program 430. TX/RX 440 is used for two-way communication. TX/RX 440 has at least one antenna to facilitate communications, although in practice the access nodes referred to in this application may have multiple antennas. The communication interface may represent any interface necessary to communicate with other network elements.
Assume that program 430 includes program instructions that, when executed by an associated processor 410, enable device 400 to operate in accordance with embodiments of the present disclosure, as discussed herein with reference to fig. 2 and 3. That is, embodiments of the present disclosure may be implemented by computer software that may be executed by the processor 410 of the device 400, or by hardware, or by a combination of software and hardware.
While this specification contains many specific implementation details, these should not be construed as limitations on the scope of any disclosure or of what may be claimed, but rather as descriptions of features specific to particular disclosure of particular implementations. Certain features that are described in this specification in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Furthermore, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination.
Similarly, although operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. As a result. In some cases, multitasking and parallel processing may be advantageous. Moreover, the separation of various system components in the embodiments described above should not be understood as requiring such separation in all embodiments, and it should be understood that the described program components and systems can generally be integrated in a single software product or packaged into multiple software products.
Various modifications, adaptations to the foregoing exemplary embodiments of this disclosure will become apparent to those skilled in the relevant arts in view of the foregoing description, when read in conjunction with the accompanying drawings. Any and all modifications will still fall within the scope of the non-limiting and exemplary embodiments of this disclosure. Moreover, other embodiments of the disclosure set forth herein will be apparent to those skilled in the art to which the disclosure relates from consideration of the specification and practice of the disclosure presented in the foregoing specification and the associated drawings.
Therefore, it is to be understood that the embodiments of the disclosure are not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (24)
1. An apparatus for communication, comprising:
at least one processor; and
a memory coupled to the at least one processor, the memory having instructions stored therein that, when executed by the at least one processor, cause the apparatus to:
receiving Downlink Control Information (DCI) from a network device at a terminal device;
extracting a set of information elements from the DCI, the set of information elements including an index related to a serving cell and a resource allocation of a bandwidth portion of the serving cell, the index including;
determining a means for responding to the received DCI by comparing the set of information elements to respective predefined values, including at least one of:
performing data transmission or data reception on the bandwidth portion of the serving cell,
performing downlink measurements on the bandwidth portion of the serving cell, or
Deactivating the serving cell, wherein a non-zero size bandwidth portion is used in combination with a zero RA to deactivate the serving cell based on a previous active/deactivated state of the serving cell.
2. A device according to claim 1, wherein the device is caused to determine the manner for responding by:
comparing the resource allocation of the bandwidth portion to a first predefined value;
the data transmission or the data reception is performed on the bandwidth portion of the serving cell in response to the resource allocation of the bandwidth portion not matching the first predefined value of a set of predefined values.
3. A device according to claim 1, wherein the device is caused to determine the manner for responding by:
comparing the resource allocation of the bandwidth portion to a first predefined value;
determining whether the serving cell is in an active state in response to the resource allocation of the bandwidth portion matching the first predefined value; and
the downlink measurement is performed on the bandwidth portion of the serving cell in response to the serving cell being in a deactivated state.
4. A device according to claim 1, wherein the device is caused to determine the manner for responding by:
comparing the resource allocation of the bandwidth portion to a first predefined value;
in response to the resource allocation matching the first predefined value, comparing the index to a second predefined value;
determining, in response to the index matching the second predefined value, whether the serving cell is in an active state; and
and deactivating the serving cell in response to the serving cell being in an active state.
5. A device according to claim 1, wherein the device is caused to determine the manner for responding by:
comparing the resource allocation of the bandwidth portion to a first predefined value;
in response to the resource allocation matching the first predefined value, comparing the index to a second predefined value; and
the downlink measurement is performed on the bandwidth portion of the serving cell in response to the index not matching the second predefined value.
6. A device according to claim 1, wherein the device is caused to determine the manner for responding by:
comparing the resource allocation of the bandwidth portion to a first predefined value;
in response to the resource allocation matching the first predefined value, comparing the index to a second predefined value; and
the serving cell is activated in response to the index not matching the second predefined value.
7. A device according to claim 1, wherein the device is caused to determine the manner for responding by:
comparing the resource allocation of the bandwidth portion to a first predefined value;
in response to the resource allocation not matching the first predefined value, comparing the index to a second predefined value; and
the data transmission or the data reception is performed on the bandwidth portion of the serving cell in response to the index matching the second predefined value of a set of predefined values.
8. The apparatus of claim 1, wherein the DCI further comprises an identification of the serving cell, and wherein the apparatus is further caused to:
determining a type of the serving cell based on the identification, the type being one of a primary cell or a secondary cell,
in response to the serving cell being a primary cell, comparing the resource allocation to a first predefined value;
in response to the resource allocation matching the first predefined value, comparing the index to a second predefined value;
switching to a predetermined bandwidth portion in response to the index matching the second predefined value;
starting a timer of the serving cell; and
monitoring the DCI is suspended until the timer expires.
9. The apparatus of claim 8, wherein the apparatus is further caused to:
determining whether a secondary cell of the serving cell is active;
discarding the DCI in response to at least one secondary cell activity.
10. The apparatus of claim 8, wherein the apparatus is further caused to:
determining whether a secondary cell of the serving cell is active;
the at least one secondary cell is deactivated in response to at least one secondary cell activity.
11. The apparatus of claim 1, wherein the index comprises: an identification of the bandwidth part or a Carrier Indicator Field (CIF).
12. A method for communication, comprising:
receiving Downlink Control Information (DCI) from a network device at a terminal device;
extracting a set of information elements from the DCI, the set of information elements including an index of a bandwidth portion of a serving cell and a resource allocation of the bandwidth portion;
determining a means for responding to the received DCI by comparing the set of information elements to respective predefined values, including at least one of:
performing data transmission or data reception on the bandwidth portion of the serving cell,
performing downlink measurements on the bandwidth portion of the serving cell, or
Deactivating the serving cell, wherein a non-zero size bandwidth portion is used in combination with a zero RA to deactivate the serving cell based on a previous active/deactivated state of the serving cell.
13. The method of claim 12, wherein determining the manner for responding comprises:
comparing the resource allocation of the bandwidth portion to a first predefined value;
the data transmission or the data reception is performed on the bandwidth portion of the serving cell in response to the resource allocation of the bandwidth portion not matching the first predefined value of a set of predefined values.
14. The method of claim 12, wherein determining the manner for responding comprises:
comparing the resource allocation of the bandwidth portion to a first predefined value;
determining whether the serving cell is in an active state in response to the resource allocation of the bandwidth portion matching the first predefined value; and
the downlink measurement is performed on the bandwidth portion of the serving cell in response to the serving cell being in a deactivated state.
15. The method of claim 12, wherein determining the manner for responding comprises:
comparing the resource allocation of the bandwidth portion to a first predefined value;
in response to the resource allocation matching the first predefined value, comparing the index to a second predefined value;
determining, in response to the index matching the second predefined value, whether the serving cell is in an active state; and
and deactivating the serving cell in response to the serving cell being in an active state.
16. The method of claim 12, wherein determining the manner for responding comprises:
comparing the resource allocation of the bandwidth portion to a first predefined value;
in response to the resource allocation matching the first predefined value, comparing the index to a second predefined value; and
the downlink measurement is performed on the bandwidth portion of the serving cell in response to the index not matching the second predefined value.
17. A method according to claim 12, wherein the device is caused to determine the manner for responding by:
comparing the resource allocation of the bandwidth portion to a first predefined value;
in response to the resource allocation matching the first predefined value, comparing the index to a second predefined value; and
the serving cell is activated in response to the index not matching the second predefined value.
18. The method of claim 12, wherein determining the manner for responding comprises:
comparing the resource allocation of the bandwidth portion to a first predefined value;
in response to the resource allocation not matching the first predefined value, comparing the index to a second predefined value; and
the data transmission or the data reception is performed on the bandwidth portion of the serving cell in response to the index matching the second predefined value of a set of predefined values.
19. The method of claim 12, wherein the DCI further comprises an identification of the serving cell, and wherein the method further comprises:
determining a type of the serving cell based on the identification, the type being one of a primary cell or a secondary cell,
in response to the serving cell being a primary cell, comparing the resource allocation to a first predefined value;
in response to the resource allocation matching the first predefined value, comparing the index to a second predefined value;
switching to a predetermined bandwidth portion in response to the index matching the second predefined value;
starting a timer of the serving cell; and
monitoring the DCI is suspended until the timer expires.
20. The method of claim 19, further comprising:
determining whether a secondary cell of the serving cell is active;
discarding the DCI in response to at least one secondary cell activity.
21. The method of claim 19, further comprising:
determining whether a secondary cell of the serving cell is active;
the at least one secondary cell is deactivated in response to at least one secondary cell activity.
22. The method of claim 12, wherein the indexing comprises: an identification of the bandwidth part or a Carrier Indicator Field (CIF).
23. A computer readable medium having stored thereon instructions which, when executed by at least one processing unit of a machine, cause the machine to perform the method of any of claims 12 to 22.
24. An apparatus for communication, comprising:
means for receiving Downlink Control Information (DCI) from a network device at a terminal device;
means for extracting a set of information elements from the DCI, the set of information elements including an index related to a serving cell and a resource allocation of a bandwidth portion of the serving cell;
means for determining a manner for responding to the received DCI by comparing the set of information elements to respective predefined values, comprising at least one of:
performing data transmission or data reception on the bandwidth portion of the serving cell,
performing downlink measurements on the bandwidth portion of the serving cell, or
Deactivating the serving cell, wherein a non-zero size bandwidth portion is used in combination with a zero RA to deactivate the serving cell based on a previous active/deactivated state of the serving cell.
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| PCT/CN2018/113721 WO2020087507A1 (en) | 2018-11-02 | 2018-11-02 | Method, device and computer readable medium for scheduling serving cells |
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| CN112970307A (en) | 2021-06-15 |
| WO2020087507A1 (en) | 2020-05-07 |
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