CN112740811A - Method, apparatus, and computer-readable medium for resource information for early data transmission - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/03—Protecting confidentiality, e.g. by encryption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W12/08—Access security
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
Abstract
Methods, apparatuses, and computer-readable media are provided for resource information for early data transmission. The resource information for initiating the EDT between the terminal device and the network device is sent in secure signalling with minimal impact on the terminal device energy consumption. Only authorized terminal devices obtain resources. The consumption of signaling 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 resource information for early data transmission.
Background
In recent communication systems, one of the features is the transmission of small data packets as part of a single access. There is a need to minimize the signaling and energy consumption overhead associated with connection establishment as much as possible to support the transmission of small data packets. Early Data Transmission (EDT) in the uplink in the random access procedure has been introduced. The terminal device is able to transmit the small data as part of message 3 of the random access procedure without establishing a Radio Resource Control (RRC) connection.
Disclosure of Invention
In general, embodiments of the present disclosure relate to methods of resource information for early data transmission and corresponding network devices and terminal devices.
In a first aspect, embodiments of the present disclosure provide a terminal device. The terminal device includes: at least one processor; at least one memory including computer program code. The at least one memory and the computer code are configured to, with the at least one processor, cause the terminal device to: first information is received, via dedicated Radio Resource Control (RRC) signaling in an RRC connection between a terminal device and a network device, relating to a resource allocated for initiating an Early Data Transfer (EDT) between the terminal device and the network device. The terminal device is further caused to obtain resources based on the first information. The terminal device is also caused to initiate an EDT to the network device using the resource.
In a second aspect, embodiments of the present disclosure provide a network device. The network device includes: at least one processor; at least one memory including computer program code. The at least one memory and the computer code are configured, with the at least one processor, to cause the network device to: first information relating to a resource allocated for initiating an Early Data Transfer (EDT) between a terminal device and a network device is sent via dedicated Radio Resource Control (RRC) signaling in an RRC connection between the terminal device and the network device. The network device is also caused to receive data packets from the terminal device using the resource.
In a third aspect, embodiments of the present disclosure provide a method. The method comprises the following steps: first information is received, via dedicated Radio Resource Control (RRC) signaling in an RRC connection between a terminal device and a network device, relating to a resource allocated for initiating an Early Data Transfer (EDT) between the terminal device and the network device. The method also includes obtaining a resource based on the first information. The method also includes initiating an EDT to the network device using the resource.
In a fourth aspect, embodiments of the present disclosure provide a method. The method comprises the following steps: first information relating to a resource allocated for initiating an Early Data Transfer (EDT) between a terminal device and a network device is sent via dedicated Radio Resource Control (RRC) signaling in an RRC connection between the terminal device and the network device. The method also includes receiving a data packet from the terminal device using the resource.
In a fifth aspect, embodiments of the present disclosure provide a computer-readable medium. The computer readable medium stores instructions thereon which, when executed by at least one processing unit of a machine, cause the machine to implement a method according to the third aspect of the disclosure.
In a sixth aspect, embodiments of the present disclosure provide another computer-readable medium. Another computer readable medium stores instructions thereon which, when executed by at least one processing unit of a machine, cause the machine to implement a method according to the fourth aspect of the disclosure.
In a seventh aspect, embodiments of the present disclosure provide an apparatus for communication. The apparatus includes means for receiving, via dedicated Radio Resource Control (RRC) signaling in an RRC connection between a terminal device and a network device, first information related to resources allocated for initiating an Early Data Transmission (EDT) between the terminal device and the network device. The apparatus also includes means for obtaining a resource based on the first information. The apparatus also includes means for initiating an EDT to the network device using the resource.
In an eighth aspect, embodiments of the present disclosure provide another apparatus for communication. The apparatus includes means for sending first information related to resources allocated for initiating Early Data Transfer (EDT) between a terminal device and a network device via dedicated Radio Resource Control (RRC) signaling in an RRC connection between the terminal device and the network device. The apparatus also includes means for receiving a data packet from the terminal device using the resource.
Other features and advantages of embodiments of the present disclosure will also be apparent from the following description of specific embodiments, when read in conjunction with the accompanying drawings which illustrate, by way of example, the principles of embodiments of the disclosure.
Drawings
Some example embodiments will now be described with reference to the accompanying drawings, in which
Fig. 1 shows a schematic diagram of a communication system according to an embodiment of the present disclosure.
Fig. 2 shows a flow diagram of a method for communication implemented at a terminal device in accordance with an embodiment of the present disclosure;
fig. 3 illustrates a flow diagram of a method for communication implemented at a network device in accordance with an embodiment of the disclosure;
FIG. 4 is a schematic diagram illustrating interactions between a terminal device and a network device according to an example embodiment of the present disclosure;
FIG. 5 is a schematic diagram illustrating interactions between a terminal device and a network device according to an example embodiment of the present disclosure; and
fig. 6 shows a schematic diagram of an apparatus according to an embodiment of the present disclosure.
Throughout the drawings, the same or similar reference numbers refer to the same or similar elements.
Detailed Description
The subject matter described herein will now be discussed with reference to several exemplary embodiments. It should be understood that these examples are discussed only for the purpose of enabling those skilled in the art to better understand and thereby implement the subject matter described herein, and are not meant to imply any limitation as to 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 shown in succession may, in fact, be executed substantially concurrently, or the functions/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), narrowband internet of things (NB-LOT), and so forth. Further, communication between the terminal device and the network devices in the communication network may be performed according to any suitable generation communication protocol, including, but not limited to, first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), fourth generation (4G), 4.5G, future fifth generation (5G) communication protocols, and/or any other protocol currently known or to be developed in the future.
Embodiments of the present disclosure may be applied to various communication systems. Given the rapid development of communications, there will, of course, also be future types of communication techniques and systems that may embody the present disclosure. The scope of the present disclosure should not be limited to only the above-described systems.
The term "network device" includes, but is not limited to, a Base Station (BS), a gateway, a management entity, and other suitable devices in a communication system. The term "base station" or "BS" denotes a node B (NodeB or NB), evolved NodeB (eNodeB or eNB), Remote Radio Unit (RRU), Radio Header (RH), Remote Radio Head (RRH), relay, low power node (e.g., femto, pico, router, etc.).
The term "terminal device" includes, but is not limited to, "User Equipment (UE)" and other suitable terminal devices capable of communicating with the network device. For example, the "terminal device" may refer to a terminal, a Mobile Terminal (MT), a Subscriber Station (SS), a portable subscriber station, a Mobile Station (MS), or an Access Terminal (AT).
As used in this application, the term "circuitry" may refer to one or more or all of the following:
(a) a purely hardware circuit implementation (such as an implementation in analog and/or digital circuitry only); and
(b) a combination of hardware circuitry and software, such as (as applicable):
(i) combinations of analog and/or digital hardware circuitry and software/firmware, and
(ii) any portion of hardware processor(s) with software (including digital signal processor (s)), software, and memory(s) that work in conjunction to cause a device, such as a mobile phone or server, to perform various functions; and
(c) hardware circuit(s) and/or processor(s), such as a microprocessor or a portion of a microprocessor, that require software (e.g., firmware) to operate but may not be present when operation is not required.
This definition of "circuitry" applies to all uses of that term in this application, including in any claims. As another example, as used in this application, the term "circuitry" also covers an implementation of purely hardware circuitry or processor (or multiple processors) or a portion of a hardware circuitry or processor and its (or their) accompanying software and/or firmware. The term "circuitry" also covers (e.g., and if applicable to the particular claim element (s)) a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in a server, a cellular network device, or other computing or network device.
As described above, EDT technology has been introduced. Further enhancements to small data transmission have been considered in the case of the possibility for a terminal device to use pre-configured resources for transmitting small data without initiating a random access procedure at all.
As part of the EDT mechanism, the network device allocates resources for message 3(Msg3) transmission for the maximum TBS size broadcast via system information, and only provides resource allocation as part of the uplink grant in message 2. According to the current specification, the random access resources used to send the preamble to request EDT are broadcast so that any terminal device can attempt to send the preamble and obtain resources for its Msg3 transmission. However, this may also be misused by ordinary terminal devices that have larger data packets to send over multiple such attempts rather than establishing a conventional RRC connection.
Furthermore, since resources dedicated to narrowband internet of things (NB-IoT)/enhanced machine type communication (eMTC) devices are very limited, the use of resources for early data transmission and the use of pre-configured resources for small data transmissions need to provide data transmissions in a secure manner, so that terminal devices authorized for such features should be able to access and successfully use the resources for early data transmissions. An unauthorized UE may also send its data using the maximum resources allocated to EDT transmissions, thereby reducing the success rate of reliable terminal devices for early data transmissions.
The presence of terminal devices sending unsafe data through Msg3 and terminal devices that use EDT very frequently rather than establishing RRC connections can be detected based on measurement metrics collected at the network device related to the EDT access procedure. However, if the network only wants to provide EDT functionality to authorized terminal devices, no mechanism is specified in the standard to prevent all terminal devices from sending EDT preambles.
To address at least in part the above and other potential problems, embodiments of the present disclosure provide solutions for resource information for early data transmission. Some example embodiments of the present disclosure are now described below with reference to the accompanying drawings. However, those skilled in the art will readily appreciate that the detailed description given herein with respect to these figures is for explanatory purposes as the disclosure extends beyond these limited embodiments.
Fig. 1 illustrates a schematic diagram of a communication environment 100 in which embodiments of the present disclosure may be implemented. Communication environment 100, which is part of a communication network, includes network device 120, and terminal device 110-1, terminal devices 110-2, … …, and terminal device 110-N (which may be collectively referred to as "terminal devices 110"). It should be understood that the number of network devices and terminal devices shown in fig. 1 is given for illustrative purposes and does not suggest any limitation. Communication system 100 may include any suitable number of network devices and terminal devices. It should be understood that communication system 100 may also include other elements that have been omitted for clarity. Network device 120 may communicate with terminal device 110.
Communications 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 cellular communication protocols, (3G), fourth generation (4G), and fifth generation (5G), etc., wireless local area network communication protocols such as institute of wireless electrical and electronics engineers (IEEE)802.11, etc., and/or any other protocol now known or later developed. Further, 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 currently known or later developed technique.
According to an embodiment of the present disclosure, resource information for initiating EDT between a terminal device and a network device is sent in secure signaling with minimal impact on terminal device energy consumption. Only authorized terminal devices obtain resources. The consumption of signaling is reduced.
Fig. 2 shows a flow diagram of a method 200 according to an embodiment of the present disclosure. Method 200 may be implemented at terminal device 110-1.
At block 210, terminal device 110-1 receives, via dedicated RRC signaling in an RRC connection between terminal device 110-1 and network device 120, first information related to resources allocated for initiating EDT between terminal device 110-1 and network device 120. The first information may be sent in any suitable downlink RRC message.
In some embodiments, the EDT service may be linked to a subscription. For example, if terminal device 110-1 is authorized for EDT services, the first information may be sent to terminal device 110-1. The first information is sent via dedicated signaling only when the terminal device 110-1 is authorized for EDT transmission.
At block 220, terminal device 110-1 obtains resources based on the first information. The resources may include, but are not limited to, one or more of the following: time domain resources for the EDT for each supported Coverage Enhancement (CE) level, frequency domain resources for the EDT for each supported Coverage Enhancement (CE) level, a preamble list or a random access resource list for initiating the EDT, and a maximum Transport Block Size (TBS) for each supported CE level.
The resource may refer to an EDT preamble configuration for Msg3-EDT transmission. The first information may also refer to an unlicensed transmission for message 1-EDT transmission or a pre-configured resource typically used for unlicensed transmission.
In some embodiments, terminal device 110-1 may receive second information of resources in the system information from network device 120 if the first information includes a cell-specific identifier. The second information may be scrambled based on the cell-specific identifier. For example, the second information may be broadcast in the system information. In such a case, the system information may include some additional parameters. For example, the system information may include one or more of the following as an eight-bit string: EDT-RACH-preamble information, EDT-preconfigured resource direct access.
Terminal device 110-1 may determine the cell-specific identifier from the first information. Terminal device 110-1 may further decode the second information based on the cell-specific identifier to obtain the resource.
If the first information is sent via dedicated RRC signaling, the first information may not be scrambled but encrypted by the AS layer security key. The terminal device 110-1 may obtain the resource and the validity period of the timer for the resource from the first information.
If terminal device 110-1 has a valid cell-specific identifier, terminal device 110-1 decodes the resource from the second information using the cell-specific identifier. The decoded string is mapped to the EDT preamble system information, time and frequency resources for the EDT preamble list, EDT resources for direct access, time and frequency information for pre-configured access, periodicity, and maximum Transport Block Size (TBS) of the region.
In an example embodiment, if terminal device 110-1 has not stored resource information related to the EDT for network device 120, and if the network device indicates that the first information is encrypted or scrambled, terminal device 110-1 initiates a normal connection oriented RRC connection establishment procedure to send its small data. In this case, the terminal device 110-1 also indicates that it is capable of the EDT mechanism.
At block 230, terminal device 110-1 initiates an EDT to network device 120 using the resource. In this way, only authorized terminal devices can use the resource to initialize the EDT, thereby avoiding misuse of the EDT.
In some embodiments, terminal device 110-1 may determine whether the resource is invalid. For example, terminal device 110-1 may receive an indication from network device 120 indicating that the resource is invalid. For example, network device 120 may modify the cell-specific identifier to avoid one single terminal device reusing the resource for other accesses. If the cell-specific identifier is changed, network device 120 may send an indication indicating that the resource is invalid. For example, the indication may be a security change flag in the system information.
Terminal device 110-1 may stop the initiation of EDT using the resource if terminal device 110-1 receives the resource invalidation indication. Terminal device 110-1 may attempt the next data transmission using conventional procedures and obtain the new cell-specific identifier via dedicated RRC signaling. In another embodiment, terminal device 110-1 may again establish the RRC connection to receive third information associated with another resource allocated for EDT.
In other embodiments, if terminal device 110-1 fails in the random access procedure based on the obtained resources, terminal device 110-1 may fall back to the RRC transmission and obtain the latest cell-specific identifier to decode the information for the third terminal. In another embodiment, terminal device 110-1 may determine whether the resource is invalid based on a validity period for the resource. Network device 120 may transmit a resource invalidation indication during the validity period. The terminal device 110-1 may stop the initiation of EDT even if the validity period has not expired.
In some embodiments, terminal device 110-1 may receive fourth information comprising a list of cells for which resources are available. Terminal device 110-1 may initiate another EDT to another network device using the resource. Another network device is located in one cell in the list.
In some embodiments, the terminal device 110-1 may also receive a time and/or frequency offset of the EDT resources to determine where the EDT is located.
In some embodiments, an apparatus (e.g., terminal device 110-1) for performing method 200 may include various means for performing the respective steps in method 200. These components may be implemented in any suitable manner. For example, it may be implemented by a circuit or a software module.
In some embodiments, the apparatus comprises: means for receiving, via dedicated Radio Resource Control (RRC) signaling in an RRC connection between the terminal device and the network device, first information relating to resources allocated for initiating Early Data Transfer (EDT) between the terminal device and the network device; means for obtaining a resource based on the first information; and means for initiating an EDT to the network device using the resource.
In some embodiments, the first information comprises a cell-specific identifier or a specific identifier for a group of cells, and the means for obtaining resources comprises: means for receiving second information of resources in the system information from the network device, the second information being scrambled based on the cell-specific identifier; and means for decoding the resource from the second information based on the cell-specific identifier to obtain the resource.
In some embodiments, the first information further indicates a valid time period for the resource.
In some embodiments, the apparatus further comprises: means for determining that the resource is invalid; means for ceasing initiation of EDT using the resource; and means for establishing an RRC connection between the terminal device and the network device for receiving third information associated with another resource allocated for EDT.
In some embodiments, the means for determining that the resource is invalid comprises: means for receiving an indication from a network device indicating that a resource is invalid; and means for determining that the resource is invalid based on the indication.
In some embodiments, the means for determining that the resource is invalid comprises: means for determining that the resource is invalid in response to expiration of a validity time period for the resource.
In some embodiments, the apparatus further comprises: means for receiving fourth information from the network device, the fourth information comprising a list of cells for which resources are available; means for initiating an EDT using the resource to another network device, the other network device associated with at least one cell in the list.
In some embodiments, the resource comprises at least one of: time domain resources for the EDT for each supported Coverage Enhancement (CE) level, frequency domain resources for the EDT for each supported Coverage Enhancement (CE) level, a preamble list or a random access resource list for initiating the EDT, and a maximum Transport Block Size (TBS) for each supported CE level.
Fig. 3 shows a flow diagram of a method 300 according to an embodiment of the present disclosure. Method 300 may be implemented at network device 120.
At block 310, network device 120 sends, via dedicated Radio Resource Control (RRC) signaling in an RRC connection between terminal device 110-1 and network device 120, first information related to resources allocated for initiating Early Data Transfer (EDT) between the terminal device and the network device. The first information may be sent in any suitable downlink RRC message.
In some embodiments, the EDT service may be linked to a subscription. For example, if terminal device 110-1 is authorized for EDT services, network device 120 may send the first information to terminal device 110-1. The first information is sent via dedicated signaling only when the terminal device 110-1 is authorized for EDT transmission.
The resource may refer to an EDT preamble configuration for Msg3-EDT transmission. The resource may also refer to a pre-configured resource for unlicensed transmission of message 1-EDT transmissions.
In some embodiments, if the first information includes a cell-specific identifier, network device 120 may scramble the second information based on the cell-specific identifier and send the second information to terminal device 110-1. The second information may be broadcast as part of the system information. Network device 120 may scramble the second information based on the cell-specific identifier. In such a case, the system information may include some additional parameters. For example, the system information may include one or more of the following as an octet string: EDT-RACH-preamble information, EDT-preconfigured resource direct access.
If the first information is sent via dedicated RRC signaling, the first information may not be scrambled but encrypted by the AS layer security key. The first information may also indicate a validity period of a timer for the resource.
At block 320, network device 120 receives a data packet from the terminal device using the resource.
In some embodiments, network device 120 may send an indication to terminal device 110-1 indicating that the resources are not available. For example, network device 120 may modify the cell-specific identifier to avoid one single terminal device reusing the resource for other accesses. If the cell-specific identifier is changed, network device 120 may send an indication indicating that the resource is invalid.
In another embodiment, the network device 120 may send third information associated with another resource that is allocated for the EDT. In some embodiments, network device 120 may send fourth information that includes a list of cells for which resources are available. In some embodiments, the network device 120 may also send a time and/or frequency offset of the EDT resource to determine where the EDT is located.
In some embodiments, a device (e.g., network device 120) for performing method 300 may include various means for performing the respective steps in method 300. These means may be implemented in any suitable way. For example, it may be implemented by a circuit or a software module.
In some embodiments, the apparatus comprises: means for sending first information relating to resources allocated for initiating Early Data Transfer (EDT) between a terminal device and a network device via dedicated Radio Resource Control (RRC) signaling in an RRC connection between the terminal device and the network device; and means for receiving a data packet from the terminal device using the resource.
In some embodiments, wherein the first information comprises a cell-specific identifier, the apparatus further comprises: means for transmitting second information of the resource in the system information, the second information being scrambled based on the cell-specific identifier.
In some embodiments, the first information further indicates a valid time period for the resource.
In some embodiments, the apparatus further comprises: means for broadcasting an indication indicating that the resource is invalid; and means for sending third information associated with another resource allocated for initiating EDT via dedicated RRC signaling in an RRC connection between the terminal device and the network device.
In some embodiments, the apparatus further comprises: means for transmitting fourth information to the terminal device, the fourth information comprising a list of cells for which resources are available.
In some embodiments, the resource comprises at least one of: time domain resources for the EDT for each supported Coverage Enhancement (CE) level, frequency domain resources for the EDT for each supported Coverage Enhancement (CE) level, a preamble list or a random access resource list for initiating the EDT, and a maximum Transport Block Size (TBS) for each supported CE level.
Fig. 4 is a schematic diagram illustrating interactions 400 between a terminal device and network device 120. For purposes of illustration, FIG. 4 is described with reference to interactions between terminal device 110-1 and network device 120. It is to be understood that the interaction 400 shown in FIG. 4 is merely an example.
The network device 120 may scramble 4005 the second information based on the cell-specific identifier. Network device 120 may broadcast 4010 the second information in the system information. Network device 120 may send 4020 first information for decoding resources from the first information to terminal device 110-1 via dedicated RRC signaling.
Terminal device 110-1 may determine 4030 a cell-specific identifier from the first information. Terminal device 110-1 may decode 4040 the resource from the second information based on the cell-specific identifier to obtain 4045 resource.
Fig. 5 is a schematic diagram illustrating interactions 500 between a terminal device and network device 120. For purposes of illustration, FIG. 5 is described with reference to interactions between terminal device 110-1 and network device 120. It is to be appreciated that the interaction 500 shown in FIG. 5 is merely an example.
Fig. 6 is a simplified block diagram of a device 600 suitable for implementing embodiments of the present disclosure. Device 600 may be implemented at network device 120. Device 600 may also be implemented at terminal device 110-1. As shown, the device 600 includes one or more processors 610, one or more memories 620 coupled to the processor(s) 610, one or more transmitters and/or receivers (TX/RX)640 coupled to the processor 610.
The processor 610 may be of any type suitable to the local technology network and may include one or more of general purpose computers, special purpose computers, microprocessors, Digital Signal Processors (DSPs) and processors based on a multi-core processor architecture, as non-limiting examples. The device 600 may have multiple processors, such as application specific integrated circuit chips, that are time dependent from a clock synchronized with the main processor.
The memory 620 may be of any type suitable for a local technology 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.
The programs 630 are assumed to include program instructions that, when executed by the associated processor 610, enable the device 600 to operate in accordance with embodiments of the present disclosure, as discussed herein with reference to fig. 2-5. That is, embodiments of the present disclosure may be implemented by computer software executable by the processor 610 of the device 600, or by hardware, or by a combination of software and hardware.
In the context of the present disclosure, computer program code or associated data may be carried by any suitable carrier to enable a device, apparatus or processor to perform the various processes and operations described above. Examples of a carrier include a signal, computer readable media, and so on.
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 disclosures 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, while 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. And (6) obtaining the 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 together in a single software product or packaged into multiple software products.
Various modifications, adaptations, and other embodiments of the present disclosure may 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 present disclosure set forth herein will occur to those skilled in the art to which these embodiments of the present disclosure pertain having the benefit of the teachings presented in the foregoing descriptions 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 (32)
1. A terminal device, comprising:
at least one processor; and
at least one memory including computer program code;
the at least one memory and the computer program code configured to, with the at least one processor, cause the terminal device to:
receiving, via dedicated Radio Resource Control (RRC) signaling in an RRC connection between a terminal device and a network device, first information relating to resources allocated for initiating Early Data Transfer (EDT) between the terminal device and the network device;
obtaining the resource based on the first information; and
initiating the EDT to the network device using the resource.
2. A terminal device according to claim 1, wherein the first information comprises a cell-specific identifier, and wherein the terminal device is caused to obtain the resource by:
receiving second information of the resource in system information from the network device, the second information being scrambled based on the cell-specific identifier;
determining the cell-specific identifier from the first information; and
decoding the resource from the second information based on the cell-specific identifier to obtain the resource.
3. The terminal device of claim 1, wherein the first information further indicates a valid time period for the resource.
4. The terminal device of claim 1, wherein the terminal device is further caused to:
determining that the resource is invalid;
stopping initiation of EDT using the resource; and
establishing the RRC connection between the terminal device and the network device for receiving third information associated with another resource allocated for the EDT.
5. The terminal device of claim 4, wherein the terminal device is caused to determine that the resource is invalid by:
receiving an indication from the network device indicating that the resource is invalid; and
determining that the resource is invalid based on the indication.
6. The terminal device of claim 4, wherein the terminal device is caused to determine that the resource is invalid by:
determining that the resource is invalid in response to expiration of a validity time period for the resource.
7. The terminal device of claim 1, wherein the terminal device is further caused to:
receiving fourth information from the network device, the fourth information comprising a list of cells for which the resources are available; and
initiating the EDT to another network device using the resources, the other network device associated with at least one cell in the list.
8. The terminal device of claim 1, wherein the resources comprise at least one of:
for each supported Coverage Enhancement (CE) level of time domain resources for the EDT,
frequency domain resources for the EDT for each supported Coverage Enhancement (CE) level,
a list of preambles used to initiate the EDT,
a maximum Transport Block Size (TBS) for each supported CE level, and
a list of random access resources for triggering the EDT.
9. A network device, comprising:
at least one processor; and
at least one memory including computer program code;
the at least one memory and the computer program code configured to, with the at least one processor, cause the network device to:
sending, via dedicated Radio Resource Control (RRC) signaling in an RRC connection between a terminal device and a network device, first information relating to resources allocated for initiating Early Data Transfer (EDT) between the terminal device and the network device; and
receiving data packets from the terminal device using the resources.
10. The network device of claim 9, wherein the first information comprises a cell-specific identifier, and the network device is further caused to:
transmitting second information of the resource in system information, the second information being scrambled based on the cell-specific identifier.
11. The network device of claim 9, wherein the first information further indicates a valid time period for the resource.
12. The network device of claim 9, wherein the network device is further caused to:
broadcasting an indication indicating that the resource is invalid; and
sending, via dedicated RRC signaling in an RRC connection between the terminal device and the network device, third information associated with another resource allocated for initiating the EDT.
13. The network device of claim 9, wherein the network device is further caused to:
sending fourth information to the terminal device, the fourth information including a list of cells for which the resources are available.
14. The network device of claim 9, wherein the resources comprise at least one of:
for each supported Coverage Enhancement (CE) level of time domain resources for the EDT,
frequency domain resources for the EDT for each supported Coverage Enhancement (CE) level,
a list of preambles used to trigger the EDT,
a maximum Transport Block Size (TBS) for each supported CE level, and
a list of random access resources for triggering the EDT.
15. A method, comprising:
receiving, via dedicated Radio Resource Control (RRC) signaling in an RRC connection between a terminal device and a network device, first information relating to resources allocated for initiating Early Data Transfer (EDT) between the terminal device and the network device;
obtaining the resource based on the first information; and
initiating an EDT to the network device using the resource.
16. The method of claim 15, wherein the first information comprises a cell-specific identifier, and obtaining the resource comprises:
receiving second information of the resource in system information from the network device, the second information being scrambled based on the cell-specific identifier;
determining the cell-specific identifier from the first information; and
decoding the resource from the second information based on the cell-specific identifier to obtain the resource.
17. The method of claim 15, wherein the first information further indicates a valid time period for the resource.
18. The method of claim 15, further comprising:
determining that the resource is invalid;
stopping initiation of EDT using the resource; and
establishing the RRC connection between the terminal device and the network device for receiving third information associated with another resource allocated for the EDT.
19. The method of claim 18, wherein determining that the resource is invalid comprises:
receiving an indication from the network device indicating that the resource is invalid; and
determining that the resource is invalid based on the indication.
20. The method of claim 18, wherein determining that the resource is invalid comprises:
determining that the resource is invalid in response to expiration of a validity time period for the resource.
21. The method of claim 15, further comprising:
receiving fourth information from the network device, the fourth information comprising a list of cells for which the resources are available; and
initiating the EDT to another network device using the resources, the other network device associated with at least one cell in the list.
22. The method of claim 15, wherein the resources comprise at least one of:
for each supported Coverage Enhancement (CE) level of time domain resources for the EDT,
frequency domain resources for the EDT for each supported Coverage Enhancement (CE) level,
a list of preambles used to initiate the EDT,
a maximum Transport Block Size (TBS) for each supported CE level, and
a list of random access resources for triggering the EDT.
23. A method, comprising:
sending, via dedicated Radio Resource Control (RRC) signaling in an RRC connection between a terminal device and a network device, first information relating to resources allocated for initiating Early Data Transfer (EDT) between the terminal device and the network device; and
receiving data packets from the terminal device using the resources.
24. The method of claim 23, wherein the first information comprises a cell-specific identifier, and the method further comprises:
transmitting second information of the resource in system information, the second information being scrambled based on the cell-specific identifier.
25. The method of claim 23, wherein the first information further indicates a valid time period for the resource.
26. The method of claim 23, further comprising:
broadcasting an indication indicating that the resource is invalid; and
sending, via dedicated RRC signaling in an RRC connection between the terminal device and the network device, third information associated with another resource allocated for initiating the EDT.
27. The method of claim 23, further comprising:
sending fourth information to the terminal device, the fourth information including a list of cells for which the resources are available.
28. The method of claim 23, wherein the resources comprise at least one of:
for each supported Coverage Enhancement (CE) level of time domain resources for the EDT,
frequency domain resources for the EDT for each supported Coverage Enhancement (CE) level,
a list of preambles used to trigger the EDT,
a maximum Transport Block Size (TBS) for each supported CE level, and
a list of random access resources for triggering the EDT.
29. A computer-readable medium having stored thereon instructions that, when executed by at least one processing unit of a machine, cause the machine to perform the method of any one of claims 15-22.
30. A computer-readable medium having stored thereon instructions that, when executed by at least one processing unit of a machine, cause the machine to perform the method of any one of claims 23-28.
31. An apparatus for communication, comprising:
means for receiving first information relating to resources allocated for initiating an Early Data Transfer (EDT) between a terminal device and a network device via dedicated Radio Resource Control (RRC) signaling in an RRC connection between the terminal device and the network device;
means for obtaining the resource based on the first information; and
means for initiating the EDT to the network device using the resource.
32. An apparatus for communication, comprising:
means for sending first information relating to resources allocated for initiating Early Data Transfer (EDT) between a terminal device and a network device via dedicated Radio Resource Control (RRC) signaling in an RRC connection between the terminal device and the network device; and
means for receiving a data packet from the terminal device using the resource.
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| PCT/CN2018/106543 WO2020056639A1 (en) | 2018-09-19 | 2018-09-19 | Methods, devices and computer readable medium for resource information for early data transmission |
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| CN112740811B (en) | 2024-04-09 |
| WO2020056639A1 (en) | 2020-03-26 |
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