CN108605350B - Scheduling configuration method for cellular communication system - Google Patents
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Abstract
In an LTE cellular communication system with carrier aggregation, the signaling overhead of scheduling request configuration can be reduced by omitting the dsr-TransMax value in the scheduling request configuration information element on the additionally configured component carriers. Another enhancement is: replacing each component carrier scheduling request configuration index with a group configuration index; the set of configuration indices specifies a single configuration index for each component carrier.
Description
Technical Field
Embodiments of the present invention relate generally to cellular communication systems and, more particularly, relate to apparatus and methods for scheduling request configuration.
Background
Cellular communication systems, such as third generation (3G) mobile telephone standards and technologies are well known. Such 3G standards and technologies were developed by the third generation partnership project. Third generation wireless communications have been widely developed to support macrocell mobile telephone communications. Such macro cells utilize high power base stations (node bs (nodebs)) to communicate with wireless communication devices within a larger geographic coverage area. Generally, a wireless communication device, or User Equipment (UE) as it is commonly called, communicates with a Core Network (CN) of a 3G wireless communication system through a Radio Network Subsystem (RNS). A wireless communication system generally includes a plurality of radio network subsystems, and each radio network subsystem includes one or more cells; one or more cells may be connected to the UE and thus to the network. Each macrocell RNS further includes a Controller in the form of a Radio Network Controller (RNC) and operatively coupled to one or more node bs. Communication systems and networks have evolved towards broadband and mobile systems. The third generation partnership project has developed a Long Term Evolution (LTE) scheme for Mobile Access networks, i.e., Evolved Universal Mobile telecommunications System terrestrial Radio Access Network (E-UTRAN); and a System Architecture Evolution (SAE) scheme for a mobile Core network, i.e., an Evolved Packet Core (EPC) was developed. A macro cell in an LTE system is supported by a base station known as an evolved Node B (eNodeB or eNB).
Another development, the long term evolution Advanced (LTE-Advanced) scheme introduced the concept of Carrier Aggregation (CA) to increase bandwidth. Each aggregated Carrier is called a Component Carrier (CC). Each component carrier has one serving cell that can be supported by a single eNB. The concept of primary cell (PCell) and secondary cell (SCell) is introduced for supporting CA. The PCell is a serving cell similar to a non-aggregated carrier condition, typically used for (among other functions) Physical Uplink Channel (PUCCH) transmission, and Radio Resource Control (RRC) connection and re-establishment. An SCell may be added to a PCell or a set of serving cells through an RRC connection reconfiguration procedure.
Before a UE can transmit data to an eNB, the UE must receive Uplink (UL) grant information from the eNB. In the LTE system, the UL grant is transmitted to the UE using dynamic Scheduling (i.e., using a so-called Scheduling Request (SR) procedure), a random access procedure, or Semi-Persistent Scheduling (SPS). The SR configuration includes (among other parameters) an SR configuration index, and the SR configuration index includes a specified frequency and subframe offset value. The UE uses the SR configuration index to determine the subframe in which the SR should be transmitted and thus the next available opportunity to transmit the SR. Dynamic scheduling in LTE allows a UE to dynamically request (in a preconfigured way) UL resources originating from in the radio access network; the radio access network has a dedicated SR (D-SR) mechanism, so that the SR can be transmitted on a dedicated resource of the PUCCH. In summary, dynamic scheduling includes the following communication steps between the network and the UE: at the eNB, upon receiving the SR on the PUCCH, transmitting a UL grant to the UE through Downlink Control Information (DCI) DCI-0 in a Physical Downlink Control Channel (PDCCH); subsequently, the UE sends a Buffer Status Report (BSR) at the first link packet, i.e. how much data there is in the UE Buffer to be sent out; then transmitting UL data through a Physical Uplink Shared Channel (PUSCH); subsequently, the (follow) ACK/NACK information is transmitted through a Physical Hybrid Activated Repeat Request Channel (PHICH).
When an opportunity arises for the UE to perform SR transmission on the carrier, the exact Transmission Time Interval (TTI) depends on the SR period and the SR offset value that has been configured by RRC signaling. RRC signaling is also used to control the maximum number of SR transmissions from the UE. The dsr-TransMax parameter in the scheduling RequestConfig signal essentially indicates that this uplink transmission may be problematic, e.g. the PUCCH resource for the SR may become invalid (due to poor signal quality or improper power setting, etc.) or the UE may lose synchronization on the uplink timing (timing) and the SR sent on the PUCCH cannot be successfully received by the eNB.
In the conventional art (in legacy) (i.e., at most Release12CA), only PCell is configured with PUCCH. Therefore, the UL grant through SR can be provided through only one carrier (i.e., PCell). It has been agreed that Release 13CA should support SR of PUCCH on SCell to mitigate resource usage within PCell. In addition, at most two cells in the UE are configured with PUCCH. Likewise, regardless of whether D-SR is configured on multiple cells, there should be only one SR process. It has also been agreed that in case of SR configured on activated PUCCH SCell and PCell, when the first UL packet is ready for transmission, the Medium Access Control (MAC) entity of the UE instructs the physical channel to transmit SR when the first opportunity occurs, and the MAC entity of the UE selects one SR when PUCCH SCell and PCell are both in the same TTI. Selecting which one is to be handed over to the UE. For example, if multiple PUCCH resources for SR are valid for TTI, since there are multiple CCs available for SR transmission at the same time, the UE is handed over to select to determine which PUCCH to use.
It would be advantageous to provide an apparatus for reducing the number of signalling required in UL dynamic scheduling in LTE-advanced systems using multiple carriers, while maintaining compatibility with at least some of the above proposals.
Disclosure of Invention
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended as an aid in determining the scope of the claimed subject matter.
According to a first aspect of the present invention, there is provided a scheduling configuration method for a cellular communication system, the cellular communication system supporting carrier aggregation, the method comprising: transmitting a primary component carrier configuration, the primary component carrier configuration being received by a wireless communication device located within the cellular communication system; sending a first scheduling request configuration; wherein the first scheduling request configuration comprises a first scheduling request information element, and the first scheduling request information element comprises a first scheduling request configuration index and a dsr-TransMax value; transmitting a secondary component carrier configuration; the secondary component carrier configuration is received by the wireless communication device; and sending a second scheduling request configuration; wherein the second scheduling request configuration comprises a second scheduling request information element; the second scheduling request information element includes a second scheduling request configuration index but does not include a dsr-TransMax value.
Another component carrier configuration and another scheduling request configuration may also be sent; wherein, the relevant scheduling request information element can also omit the dsr-TransMax value.
According to a second aspect of the present invention, there is provided a network element supporting a primary component carrier and a secondary component carrier in a cellular communication system, the cellular communication system supporting carrier aggregation; the network element is configured to: transmitting a primary component carrier configuration, the primary component carrier configuration being received by a wireless communication device located within the cellular communication system; sending a first scheduling request configuration; wherein the first scheduling request configuration is received by the wireless communication device; the first scheduling request configuration comprises a first scheduling request information element, and the first scheduling request information element comprises a first scheduling request configuration index and a dsr-TransMax value; transmitting a secondary component carrier configuration; the secondary component carrier configuration is received by the wireless communication device; and sending a second scheduling request configuration; wherein the second scheduling request configuration is received by the wireless communication device; the second scheduling request configuration comprises a second scheduling request information element; the second scheduling request information element includes a second scheduling request configuration index but does not include a dsr-TransMax value.
The present invention recognizes that the dsr-TransMax values do not need to be updated (with) with each component carrier configuration (or reconfiguration) for the UE. Sending unnecessary information wastes resources and thus by omitting sending the dsr-TransMax value, signaling load can be saved.
Determining, by the network element, whether a dsr-TransMax value is included in a scheduling request information element; wherein the network element is an eNB. In making this decision, a factor that may be considered by the network element (or eNB) is the delay of the wireless communication device (or UE) to transmit the packet. The dsr-TransMax value is a parameter that controls how long the UE should wait before giving up trying to acquire PUSCH and starting a new attempt. Only one SR procedure is run at the MAC entity of the UE, so in any CC configuration (or reconfiguration) the eNB sends only one value of dsr-Transmax to the UE. In case PUCCH resources are present on at least one CC, the UE will consider the latest updated dsr-TransMax value when transmitting the SR on any of these CCs. The eNB may set this value by, for example, considering the load of all CCs. Thus, if a new PUCCH SCell is configured and the current dsr-TransMax value does not impose any restrictions on e.g. the PUCCH load for that SCell, then there should be no need to update this value.
According to a third aspect of the present invention, there is provided a scheduling configuration method for a cellular communication system, the cellular communication system supporting carrier aggregation, the method comprising: transmitting a primary component carrier configuration, the primary component carrier configuration being received by a wireless communication device located within the cellular communication system; sending a first scheduling request configuration; wherein the first scheduling request configuration comprises a first scheduling request information element, and the first scheduling request information element comprises a scheduling request configuration index and a dsr-TransMax value; transmitting a secondary component carrier configuration; the secondary component carrier configuration is received by the wireless communication device; and sending a second scheduling request configuration; wherein the second scheduling request configuration comprises a second scheduling request information element; the second scheduling request information element includes a scheduling request set configuration index, and the scheduling request set configuration index specifies a single configuration index for each component carrier.
According to a fourth aspect of the present invention, there is provided a network element supporting a primary component carrier and a secondary component carrier in a cellular communication system, the cellular communication system supporting carrier aggregation; the network element is configured to: transmitting a primary component carrier configuration, the primary component carrier configuration being received by a wireless communication device located within the cellular communication system; sending a first scheduling request configuration; wherein the first scheduling request configuration comprises a first scheduling request information element, and the first scheduling request information element comprises a scheduling request configuration index and a dsr-TransMax value; transmitting a secondary component carrier configuration; the secondary component carrier configuration is received by the wireless communication device; and sending a second scheduling request configuration; wherein the second scheduling request configuration comprises a second scheduling request information element; the second scheduling request information element includes a scheduling request set configuration index, and the scheduling request set configuration index specifies a single configuration index for each component carrier.
The second scheduling request information element may or may not include a dsr-TransMax value.
The scheduling request group configuration index may comprise a bitmap, and the bitmap specifies a single configuration index for each component carrier. In contrast to conventional techniques where scheduling request configuration indexes are separately transmitted for each component carrier, the alternative use of a bitmap means that fewer bits are required in the transmitted indexes, and thus resources can be conserved.
According to a fifth aspect of the present invention, there is provided a wireless communication device for a cellular communication system, the wireless communication device being configured to: receiving a primary component carrier configuration and a secondary component carrier configuration; receiving a first scheduling request information element and a second scheduling request information element with respect to a primary component carrier and a secondary component carrier, respectively; wherein the first scheduling request information element and the second scheduling request information element are from a network element of the cellular communication system; and configuring the scheduling request according to the received first scheduling request configuration information element and the second scheduling request configuration information element; wherein the second scheduling request configuration information element comprises a scheduling request group configuration index, and the scheduling request group configuration index specifies a single configuration index for each component carrier.
The wireless communication device may be a UE or similar mobile communication device.
The present invention may be used to introduce RRC protocol enhancements to improve scheduling request procedures when multiple PUCCH CCs are SR configured to serve LTE CA enabled UEs in connected mode.
The cellular communication system may be an LTE-advanced system and the network element may be an evolved node B. Carrier aggregation for multiple scheduling request configurations may be provided to the wireless communication device from the same evolved node B or from different evolved node bs (e.g., in the case of dual connectivity).
According to a sixth aspect of the present invention there is provided a non-transitory computer readable medium having computer readable instructions stored thereon and executable by a processor to perform the method according to the first or third aspect.
The non-transitory computer readable medium includes at least one of: hard disk, CD-ROM, optical storage devices, magnetic storage devices, read-only memory, programmable read-only memory, erasable programmable read-only memory, EPROM, electrically erasable programmable read-only memory, and flash memory.
Preferably, the invention can reduce RRC signaling load in a system of a carrier aggregation service UE configured by a plurality of scheduling requests. The common configuration of scheduling request indices for component carriers within a group may optimize the performance of uplink scheduling.
Drawings
Other details, aspects and embodiments of the invention are described below, by way of example only, with reference to the accompanying drawings. For simplicity and clarity of illustration, elements in the figures are illustrated and not necessarily drawn to scale. The same reference numerals are included in the respective drawings for ease of understanding.
Fig. 1 is a simplified block diagram of portions of a cellular communication system and its operation in accordance with an example embodiment;
fig. 2 is a simplified flowchart illustrating a first example of a scheduling configuration method; and
fig. 3 is a simplified flowchart illustrating a second example of a scheduling configuration method.
Detailed Description
Those skilled in the art will recognize and appreciate that the specifics of the described examples are merely illustrative of some embodiments and that the teachings set forth herein are applicable in a variety of alternative settings.
Referring now to fig. 1, fig. 1 illustrates an example of portions of an LTE cellular communication system in operation, according to an embodiment of the present invention. Therein, the LTE cellular communication system is generally denoted 100 and comprises an evolved Node B (eNB) 101. The eNB101 includes a scheduler 102 and a transceiver 103. The eNB101 utilizes carrier aggregation and supports primary and secondary component carriers represented by PCell 104 and SCell 105, respectively. In other examples, the eNB101 may support at least two component carriers. A carrier-aggregation-enabled (CA-enabled) UE 106 is located within the coverage area of both PCell 104 and SCell 105. The transceiver 103 is arranged in a conventional manner for transmitting and receiving communication signals and data to and from the UE 106. The scheduler 102 is arranged to coordinate (co-ordinate) SR configurations in the following manner.
The eNB101 communicates with a UE (e.g., UE 106) that is component carrier enabled and in a connected state; wherein the UEs may be semi-statically configured with at least one UL CC (i.e., PCell 104 and UL SCell 105 shown in the example of fig. 1). The UE may also be configured with periodic SR opportunities on the primary and secondary component carriers and have these component carriers activated simultaneously for serving the UE. In the eNB, the scheduler 102 may periodically monitor the uplink scheduling load and the activity of the UE and use this information to dynamically adjust the SR scheduling parameters between the primary and secondary CCs.
Conventional signaling of SR indices per CC provides the eNB with full flexibility to control how long and when the UE can get an opportunity to transmit the SR per CC. The present invention enhances in limiting UE specific information or information that does not need to be updated or exchanged by an Information Element (IE) scheduling requestconfig each time a CC is configured (or re-configured) for a UE.
Generally, the scheduling request configuration information elements for the primary and secondary CCs include a 3-bit dsr-TransMax value and an 8-bit scheduling request configuration index. The scheduling request configuration index controls an SR period and a Subframe (SF) offset value. Typically, the dsr-TransMax value will be signaled whether or not an update is required. It is possible that there is no need to update the dsr-TransMax value for each added secondary CC, so resources can be optimized. In a first embodiment, the eNB101 may ensure that the scheduling request configuration information element (for the secondary CC) transmitted to the UE 106 does not contain a dsr-TransMax value. Thus, 3 bits of data can be saved. Notably, with respect to the primary CC, the dsr-TransMax value will be initialized for the UE 106 to limit the number of SR retransmissions and avoid overloading the NB. In general, the dsr-TransMax value is used to improve the reliability of D-SR and to prompt the UE to release SR resources when deemed appropriate.
In a second embodiment, the scheduling request configuration information element includes a set configuration index, and the set configuration index may be calculated by the scheduler 102. With respect to the secondary CC, the dsr-TransMax value may or may not be included in the scheduling request configuration information.
Generally, in the case where a group of CCs including at least two CCs is serving a UE, it is required in conventional practice that RRC signaling of a shutdownrequestconfig message should be performed for each CC-UE link at the time of CC configuration (or reconfiguration). In this example, redundant UE-specific information (i.e., a UE identification port number (port number) communicated, for example, through sr-PUCCH-resource index and sr-PUCCH-resource index 1) occurs multiple times between the eNB and the UE. However, such multiple exchanges are not necessary. Therefore, in the second embodiment, a single set of SR configuration indexes is used instead of a plurality of SR configuration indexes per CC. The group index includes a bitmap for updating parameters required for all SRs through RRC signaling from any single link and thus allows the system to be relieved from the exchange of redundant information and different links.
The present embodiments may have additional advantages in the case where multiple SR configured carriers are provided to a UE from different enbs (e.g., in the case of dual connectivity). For example, when a group of CCs need to be SR configured jointly to improve the performance of the system and these CCs are not from only a single eNB, all eNB schedulers and RRC signaling to UEs in the group reconfiguration phase need to have good synchronization so that SR related parameters of all CCs are updated simultaneously for the UEs. In a second embodiment, the update of SR related parameters for all CCs may be done through single link RRC signaling. Therefore, the constraint of synchronicity can be reduced.
When more than one CC is SR configured for a UE, the eNB scheduler will need to coordinate SR opportunities among the CCs to improve system performance. For example, to reduce UL delay, the PCell and PUCCH SCell for the UE may be jointly configured in terms of SR subframe offset parameters or even SR periodicity parameters (if allowed by PUCCH/PUSCH load constraints). In this manner, SR transmission instances (instances) originating from each CC may be coordinated with instances on other CCs. Thus, for example, interleaving (interleaving) of SR configuration indices may be considered if the goal is to minimize SR stage average latency. Basically, the above coordinated SR configuration may already be performed at the eNB scheduler according to the current setup procedure when configuring (reconfiguring) each CC by scheduling requestconfig. However, important problems arise with this known process as follows. If the system needs to have a group of SR configured CCs configured in a coordinated manner, an SR configuration index needs to be sent for each CC within the group each time an additional SR configured CC is configured (or an existing SR configured CC is reconfigured). For X SR configured CCs (X is an integer greater than 1), RRC signaling would be required up to X (2X 11+8+3) bits (i.e. for each CC: when 2 antenna ports are available, 2X 11 bits are used to indicate SR-PUCCH-resource index and SR-PUCCH-resource index 1 for UEs with frequency domain resources, 8 bits are used for ConfigIndex, 3 bits are used for dsr-TransMax). For example, in the example shown in fig. 1, X ═ 2, so 66 bits are signaled in total.
To improve this situation, according to an embodiment of the present invention, a single set of SR configuration indices (gIs) is used for each CCSR) Without using ISRTo control the periodicity and offset of opportunities to transmit to the UE from the entire serving group (serving group) of SR-configured CCs, including the primary and secondary CCs shown in the example of fig. 1. Once in the configuration (or reconfiguration) process of the CC, the index is updated and applied to all CCs. Thus, gISRA bitmap specifying a single index may be constructed for each CC; that is, a vector having X ([ log ]) may be used2X]+8) bit bitmap to cover the currently existing period/offset toFor X CCs. Operation.]Refers to a ceiling operation (ceiling operation). For example, for X ═ 3, the minimum number of bits needed is: [ log ]23]2 bits to identify a carrier among all three carriers.
Thus, in the X-2 example, only 43 bits are needed in each configuration (reconfiguration), unlike 66 bits that are needed in the conventional manner. Thus, when adding another CC for dynamic scheduling of the UE, the group configuration index thus allows a CC (e.g., a primary CC in fig. 1) that has been SR-configured to be co-reconfigured with another CC (e.g., a secondary CC in fig. 1).
The benefits of RRC signaling reduction become even more important when considering at least two SR configured CCs and/or when a frequency reconfiguration of PUCCH CCs occurs.
The following table shows the bitmap gI of two component carriers (X ═ 2), e.g. the primary and secondary component carriers (PCC, SCC) in fig. 1SRExamples of (3). For a range of 158 values, each (integer) entry is 8 bits. The bitmap is computed in scheduler 102.
Referring now to the flowchart in fig. 2, a first example of a scheduling configuration method that may be performed in the system shown in fig. 1 is shown. At 201, a primary component carrier (represented by cell 104 in fig. 1) is configured in the UE 106 by the eNB101 sending the necessary configuration signaling. The configuration may be performed according to known techniques (including, for example, RRC connection procedures). At 202, transmitting, by the eNB101, a scheduling request configuration, the scheduling request configuration for the primary component carrier being configured in the UE 106; wherein the scheduling request configuration comprises a scheduling request configuration information element. The scheduling request configuration basically informs the UE of PUCCH resources available on the primary component carrier and used to make the configuration request. The information element includes a scheduling request configuration index and a dsr-TransMax value. At 203, the secondary component carrier (represented by cell 105 in fig. 1) is configured in the UE 106 by the eNB101 transmitting the necessary configuration signaling. The configuration is performed according to known carrier aggregation techniques. At 204, transmitting, by the eNB101, a scheduling request configuration for the secondary CC configured in the UE 106; wherein the scheduling request configuration comprises a scheduling request configuration information element. The scheduling request configuration basically informs the UE of PUCCH resources available on the secondary component carrier and used to make the configuration request. The information element comprises a scheduling request configuration index; however, to save resources, the dsr-TransMax value is omitted.
Referring now to the flowchart in fig. 3, a second example of a scheduling configuration method that may be performed in the system shown in fig. 1 is shown. The primary component carrier (represented by cell 104 in fig. 1) and the secondary component carrier (represented by cell 105 in fig. 1) constitute a service group of SR-configurable component carriers. At 301, a primary component carrier is configured in the UE 106 by the eNB101 sending the necessary configuration signaling. The configuration may be performed according to known techniques (including, for example, RRC connection procedures). At 302, a scheduling request configuration is transmitted by the eNB101, a first scheduling request configuration regarding a primary component carrier being configured in the UE 106; the scheduling request configuration sent by the eNB101 includes a first scheduling request configuration information element. The scheduling request configuration basically informs the UE of PUCCH resources available on the primary component carrier for making the configuration request. The information element includes a scheduling request configuration index and a dsr-TransMax value. At 303, the secondary component carrier is configured in the UE 106 by the eNB101 sending the necessary configuration signaling. The configuration is performed according to known carrier aggregation techniques. At 304, transmitting, by the eNB101, a scheduling request configuration, the second scheduling request configuration being configured in the UE 106; wherein the scheduling request configuration transmitted by the eNB101 includes a second scheduling request configuration information element. The scheduling request configuration basically informs the UE of PUCCH resources available on the secondary component carrier for making the configuration request. The second information element includes a scheduling request group configuration index. The set of configuration indexes is generated in the scheduler 102 and comprises a bitmap; the bitmap specifies a single configuration index for the primary component carrier and the secondary component carrier. By using the group configuration index contained in the scheduling request configuration information element, there is no need to reconfigure another scheduling request for the primary component carrier in the configuration of the secondary component carrier. Therefore, compared with the traditional technology, the invention can save resources.
The methods described in connection with fig. 2 and 3 may be applied to examples in which component carriers are licensed or unlicensed. In the unlicensed example, it is possible to provide SR on more carriers than theoretically in the future to mitigate situations where some carriers are sensed to be very busy. In this example, there will be many SR configured CCs to use for the UE at the same time, and reconfiguration will occur frequently. Thus, the potential provided by the present application to reduce signaling load will become even more important.
Optionally, more SR opportunities will be provided to the UE on the preferred CC; however, these SR opportunities are typically provided in a shortened time period in view of the current UE-CC link conditions. This will effectively reduce the delay of the first packet link transmission. To perform this option, L1 signaling will be used to update part (or all) of the group configuration index.
Optionally, the bitmap including the group configuration index may be modified so that the SR period and the update of the offset parameter are optional for any particular component carrier. This option provides a great advantage for instances where not all CCs within a group need to be reconfigured at the time of CC configuration (or reconfiguration). For example, it may be more appropriate for unlicensed carriers (e.g., licensed-assisted access CCs) to have fixed or slower configured SR periods and offset parameters to avoid too frequent reconfiguration due to frequent releases and additions of these CCs.
The signal processing functions of embodiments of the present invention, and in particular the scheduler 102 and the UE 106, may be implemented using computing systems or architectures known to those skilled in the relevant art. Computing systems such as desktop, palmtop or notebook computers, hand-held computing devices (PDAs, mini phones, palmtops, etc.), mainframes, servers, clients, or any other type of special or general purpose computing device as may be necessary or appropriate for a given application or environment may be used. The computing system may include one or more processors, where a processor may be implemented using a general or special purpose processing engine, such as, for example, a microprocessor, microcontroller or other control module.
The computing system may also include a main Memory, such as a Random Access Memory (RAM) or other dynamic Memory, for storing information and instructions to be executed by the processor. Such main memory may also be used for storing temporary variables or other intermediate information during execution of instructions to be executed by the processor. The computing system may also include a Read Only Memory (ROM) or other static storage device for storing static information and instructions for the processor.
The computing system may also include an information storage system that may include, for example, a media drive and a removable storage interface. The media drive may include a drive or other mechanism to support fixed or removable storage media, such as a hard disk drive, a floppy disk drive, a magnetic tape drive, an optical disk drive, a Compact Disc (CD), a Digital Video Drive (DVD) or a read or write drive (R or RW), or other removable or fixed media drive. The storage media may include, for example, a hard disk, floppy disk, magnetic tape, optical disk, CD or DVD, or other fixed or removable medium that is read by and written to by a media drive. The storage media may include a computer-readable storage medium having stored thereon particular computer software or data.
In alternative embodiments, the information storage system may include other similar components for allowing computer programs or other instructions or data to be loaded into the computing system. Such components may include, for example, removable storage units and interfaces (e.g., program cartridges and cartridge interfaces), removable storage (e.g., flash memory or other removable memory modules) and memory slots, as well as other removable storage units and interfaces that allow software and data to be transferred from the removable storage unit to the computing system.
The computing system may also include a communications interface. Such a communication interface may be used to allow software and data to be transferred between the computing system and external devices. The communication interface may include, for example, a modem, a network interface (e.g., an ethernet or other NIC card), a communication port (e.g., a Universal Serial Bus (USB) port), a PCMCIA slot and card, etc. Software and data transferred via the communication interface are in the form of signals which may be electronic, electromagnetic, optical, or other signals capable of being received by the communication interface medium.
In this application, the terms "computer program product," "computer-readable medium," and the like may be used generally to refer to tangible media, such as memory, storage devices, or storage units. These and other forms of computer-readable media may store one or more instructions for use by a processor, including the computer system, to cause the processor to perform specified operations. Such instructions, generally referred to as "computer program code" (which may be grouped in the form of computer programs or other groupings), when executed, enable the computing system to perform functions of embodiments of the present invention. Note that the code may directly cause the processor to perform certain operations, or be compiled to do so, and/or be combined with other software, hardware, and/or firmware elements (e.g., databases for performing standard functions) to do so.
In embodiments where the elements are implemented using software, the software may be stored on a computer-readable medium and loaded into the computing system using, for example, a removable storage drive. When the control module is executed by a processor in a computing system, the control module (in this embodiment, the control module is software instructions or executable computer program code) causes the processor to perform the functions of the invention as described herein.
Further, the concepts of the present invention may be applied to any circuit for performing signal processing functions within a network element. It is further contemplated that, for example, a semiconductor manufacturer may employ the concepts of the present invention in the design of a stand-alone device, such as a microcontroller of a Digital Signal Processor (DSP), or an application-specific integrated circuit (ASIC), and/or any other subsystem component.
It will be appreciated that the above description, for clarity, has described embodiments of the invention with reference to a single processing logic. The inventive concept may, however, equally be implemented by means of a plurality of different functional units and processors, in order to provide the signal processing functions. Thus, references to specific functional units are only to be seen as references to suitable means for providing the described functionality rather than strict logical or physical structure or organization statements.
Aspects of the invention may be implemented in any suitable form including hardware, software, firmware or any combination of these. The invention is optionally implemented at least partly as computer software running on one or more data processors and/or digital signal processors or configurable modular components, e.g. FPGA devices. Thus, the elements and components of an embodiment of the invention may be physically, functionally and logically implemented in any suitable way. Indeed the functionality may be implemented in a single unit, in a plurality of units or as part of other functional units.
Although the present invention has been described in connection with some embodiments, it is not intended to be limited to the specific form set forth herein. Rather, the scope of the invention is limited only by the attached claims. Additionally, although some features may appear to be described in connection with particular embodiments, one skilled in the art will recognize that various features of the described embodiments may be combined in accordance with the invention. In the claims, the term "comprising" does not exclude the presence of other elements or steps.
Furthermore, although individually listed, a plurality of means, elements or method steps may be implemented by e.g. a single unit or processor. Furthermore, although individual features may be included in different claims, these may possibly advantageously be combined, and the inclusion in different claims does not imply that a combination of features is not feasible and/or advantageous. Furthermore, the inclusion of a feature in one category of claims does not imply a limitation to this category but rather indicates that the feature is equally applicable to other claim categories as appropriate.
Furthermore, the order of features in the claims does not imply any specific order in which the features must be performed and in particular the order of individual steps in a method claim does not imply that the steps must be performed in this order. Rather, the steps may be performed in any suitable order. In addition, singular references do not exclude a plurality. Thus, references to "a", "an", "first", "second", etc., do not preclude a plurality.
Although the present invention has been described in connection with some embodiments, it is not intended to be limited to the specific form set forth herein. Rather, the scope of the invention is limited only by the attached claims. Additionally, although some features may appear to be described in connection with particular embodiments, one skilled in the art will recognize that various features of the described embodiments may be combined in accordance with the invention. In the claims, the terms "comprising" or "comprises" do not exclude the presence of other elements or steps.
Claims (8)
1. A scheduling configuration method for a cellular communication system supporting carrier aggregation, the method comprising:
transmitting a primary component carrier configuration, the primary component carrier configuration being received by a wireless communication device located within the cellular communication system;
sending a first scheduling request configuration; wherein the first scheduling request configuration comprises a first scheduling request information element, and the first scheduling request information element comprises a scheduling request configuration index and a dsr-TransMax value;
transmitting a secondary component carrier configuration; the secondary component carrier configuration is received by the wireless communication device; and
sending a second scheduling request configuration; wherein the second scheduling request configuration comprises a second scheduling request information element; the second scheduling request information element includes a scheduling request set configuration index, and the scheduling request set configuration index specifies a single configuration index for each component carrier.
2. The method of claim 1, wherein the second scheduling request information element comprises a dsr-TransMax value.
3. The method of claim 1, wherein the second scheduling request information element does not include a dsr-TransMax value.
4. The method of any of claims 1-3, wherein the scheduling request group configuration index comprises a bitmap, and wherein the bitmap specifies a single configuration index for each component carrier.
5. A network element supporting primary and secondary component carriers in a cellular communication system, and the cellular communication system supporting carrier aggregation; wherein the network element is configured to:
transmitting a primary component carrier configuration, the primary component carrier configuration being received by a wireless communication device located within the cellular communication system;
sending a first scheduling request configuration; wherein the first scheduling request configuration comprises a first scheduling request information element, and the first scheduling request information element comprises a scheduling request configuration index and a dsr-TransMax value;
transmitting a secondary component carrier configuration; the secondary component carrier configuration is received by the wireless communication device; and
sending a second scheduling request configuration; wherein the second scheduling request configuration comprises a second scheduling request information element; the second scheduling request information element includes a scheduling request set configuration index, and the scheduling request set configuration index specifies a single configuration index for each component carrier.
6. A wireless communication device for use in a cellular communication system, the wireless communication device configured to:
receiving a primary component carrier configuration and a secondary component carrier configuration;
receiving a first scheduling request information element and a second scheduling request information element with respect to a primary component carrier and a secondary component carrier, respectively; wherein the first scheduling request information element and the second scheduling request information element are from a network element of the cellular communication system; and
configuring a scheduling request according to the received first scheduling request configuration information element and the second scheduling request configuration information element; wherein the second scheduling request configuration information element comprises a scheduling request group configuration index, and the scheduling request group configuration index specifies a single configuration index for each component carrier.
7. A computer-readable storage medium having computer-readable instructions stored thereon, the computer-readable instructions being executable by a processor to perform the method of claim 1.
8. The computer-readable storage medium of claim 7, wherein the computer-readable storage medium comprises at least one of: hard disk, CD-ROM, optical storage devices, magnetic storage devices, read-only memory, programmable read-only memory, erasable programmable read-only memory, EPROM, electrically erasable programmable read-only memory, and flash memory.
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| WO2022027367A1 (en) * | 2020-08-05 | 2022-02-10 | Apple Inc. | System and methods for dynamic scheduling in new radio with user equipment |
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| CN102075949B (en) * | 2010-12-22 | 2013-03-20 | 大唐移动通信设备有限公司 | Carrier aggregation (CA) technology-based data transmission method and device |
| ES2793274T3 (en) * | 2011-05-02 | 2020-11-13 | Ericsson Telefon Ab L M | Method and apparatus for prohibiting transmission of sounding reference signals in newly activated secondary cells in a wireless communication system |
| US10028295B2 (en) * | 2012-03-29 | 2018-07-17 | Nokia Solutions And Networks Oy | Method and an apparatus to control scheduling |
| US9497007B2 (en) * | 2012-05-15 | 2016-11-15 | Telefonaktiebolaget L M Ericsson | Methods of sending feedback signaling under carrier specific measurement gaps in multi-carrier |
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