CN111903159B - Method, apparatus and computer readable storage medium for communication - Google Patents
Method, apparatus and computer readable storage medium for communication Download PDFInfo
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- CN111903159B CN111903159B CN201880091775.0A CN201880091775A CN111903159B CN 111903159 B CN111903159 B CN 111903159B CN 201880091775 A CN201880091775 A CN 201880091775A CN 111903159 B CN111903159 B CN 111903159B
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- 238000004891 communication Methods 0.000 title claims description 58
- 230000015654 memory Effects 0.000 claims description 18
- 238000004590 computer program Methods 0.000 claims description 17
- 230000008054 signal transmission Effects 0.000 claims description 10
- 230000000153 supplemental effect Effects 0.000 claims description 9
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- 239000000969 carrier Substances 0.000 description 16
- 230000006870 function Effects 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 9
- 238000010295 mobile communication Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000013459 approach Methods 0.000 description 3
- 238000013500 data storage Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 230000001413 cellular effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/365—Power headroom reporting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/32—TPC of broadcast or control channels
- H04W52/325—Power control of control or pilot channels
Abstract
There is provided a method comprising: providing a first control element from the user equipment to the network, the first control element comprising power headroom information for a first uplink carrier associated with the cell; determining whether a second carrier associated with the cell exists; and if so, providing a second control element from the user equipment to the network, the second control element comprising power headroom information for a second uplink carrier, wherein the first control element and the second control element are separate control elements.
Description
Technical Field
The present application relates to a method, apparatus, system and computer program, in particular, but not exclusively, to reporting power headroom with a Supplementary Uplink (SUL).
Background
A communication system may be considered a facility for effectuating a communication session between two or more entities, such as user terminals, base stations, and/or other nodes, by providing carriers between the various entities involved in the communication path. The communication system may be provided, for example, by means of a communication network and one or more compatible communication devices. For example, a communication session may include data communications for carrying communications such as voice, video, electronic mail (email), text messages, multimedia, and/or content data. Non-limiting examples of services provided include bi-or multi-directional calls, data communication or multimedia services, and access to data network systems such as the internet.
In a wireless communication system, at least a portion of a communication session between at least two stations occurs over a wireless link. Examples of wireless systems include Public Land Mobile Networks (PLMNs), satellite-based communication systems, and different wireless local networks, such as Wireless Local Area Networks (WLANs). A wireless system may be generally divided into cells and is therefore often referred to as a cellular system.
The user may access the communication system by means of a suitable communication device or terminal. The communication device of the user may be referred to as User Equipment (UE) or user equipment. The communication device is provided with suitable signal receiving and transmitting means to enable communication, for example to enable access to a communication network or to communicate directly with other users. A communication device may access a carrier provided by a station (e.g., a base station of a cell) and transmit and/or receive communications on the carrier.
Communication systems and associated devices typically operate in accordance with a given standard or specification which sets out what the various entities associated with the system are permitted to do and how that should be achieved. Communication protocols and/or parameters which should be used for the connection are also typically defined. One example of a communication system is UTRAN (3G radio). Other examples of communication systems are the Long Term Evolution (LTE) of the Universal Mobile Telecommunications System (UMTS) radio access technology and so-called 5G or New Radio (NR) networks. NR is being standardized by the third generation partnership project (3 GPP).
Disclosure of Invention
In a first aspect, there is provided a method comprising: providing a first control element from the user equipment to the network, the first control element comprising power headroom information for a first uplink carrier associated with the cell; determining whether a second carrier associated with the cell exists; and if so, providing a second control element from the user equipment to the network, the second control element comprising power headroom information for a second uplink carrier, wherein the first control element and the second control element are separate control elements.
The second uplink carrier may be configured for sounding reference signal transmission.
The power headroom information may include a power headroom report.
The second control element may include: the second control element includes an indication of power headroom information for a second uplink carrier.
The indication may include one of: logical channel identification, reserved bits or second control element relative to the first control element.
The second uplink carrier may be a supplemental uplink carrier.
In a second aspect, there is provided a method comprising: receiving, at a network, a first control element from a user equipment, the first control element comprising power headroom information for a first uplink carrier associated with a cell; and if there is a second uplink carrier associated with the cell, receiving, at the network, a second control element from the user equipment, the second control element comprising power headroom information for the second uplink carrier, wherein the first control element and the second control element are separate control elements.
The second uplink carrier may be configured for sounding reference signal transmission.
The power headroom information may include a power headroom report.
The second control element may include: the second control element includes an indication of power headroom information for a second uplink carrier.
The indication may include one of: logical channel identification, reserved bits or the position of the second control element relative to the first control element.
The second uplink carrier may be a supplemental uplink carrier.
In a third aspect, there is provided an apparatus comprising: providing, from the user equipment to the network, a first control element comprising power headroom information for a first uplink carrier associated with the cell; means for determining whether a second carrier associated with the cell exists; and means for providing a second control element from the user equipment to the network, if present, the second control element comprising power headroom information for a second uplink carrier, wherein the first control element and the second control element are separate control elements.
The second uplink carrier may be configured for sounding reference signal transmission.
The power headroom information may include a power headroom report.
The second control element may include: the second control element includes an indication of power headroom information for a second uplink carrier.
The indication may include one of: logical channel identification, reserved bits or the position of the second control element relative to the first control element.
The second uplink carrier may be a supplemental uplink carrier.
In a fourth aspect, there is provided an apparatus comprising: means for receiving, at a network, a first control element from a user equipment, the first control element comprising power headroom information for a first uplink carrier associated with a cell; and means for receiving, at the network, a second control element from the user equipment if there is a second uplink carrier associated with the cell, the second control element comprising power headroom information for the second uplink carrier, wherein the first control element and the second control element are separate control elements.
The second uplink carrier may be configured for sounding reference signal transmission.
The power headroom information may include a power headroom report.
The second control element may include: the second control element includes an indication of power headroom information for a second uplink carrier.
The indication may include one of: logical channel identification, reserved bits or the position of the second control element relative to the first control element.
The second uplink carrier may be a supplemental uplink carrier.
In a fifth aspect, an apparatus is provided that includes 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 apparatus at least to
Providing a first control element from the user equipment to the network, the first control element comprising power headroom information for a first uplink carrier associated with the cell; determining whether a second carrier associated with the cell exists; and if so, providing a second control element from the user equipment to the network, the second control element comprising power headroom information for a second uplink carrier, wherein the first control element and the second control element are separate control elements.
The second uplink carrier may be configured for sounding reference signal transmission.
The power headroom information may include a power headroom report.
The second control element may include: the second control element includes an indication of power headroom information for a second uplink carrier.
The indication may include one of: logical channel identification, reserved bits or second control element relative to the first control element.
The second uplink carrier may be a supplemental uplink carrier.
In a sixth aspect, there is provided an apparatus 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 apparatus at least to: receiving, at a network, a first control element from a user equipment, the first control element comprising power headroom information for a first uplink carrier associated with a cell; and if there is a second uplink carrier associated with the cell, receiving, at the network, a second control element from the user equipment, the second control element comprising power headroom information for the second uplink carrier, wherein the first control element and the second control element are separate control elements.
The second uplink carrier may be configured for sounding reference signal transmission.
The power headroom information may include a power headroom report.
The second control element may include an indication that it includes power headroom information for the second uplink carrier.
The indication may include one of: logical channel identification, reserved bits or the position of the second control element relative to the first control element.
The second uplink carrier may be a supplemental uplink carrier.
In a seventh aspect, there is provided a computer program embodied on a non-transitory computer readable storage medium, the computer program comprising program code for controlling a process to perform a process comprising: providing a first control element from the user equipment to the network, the first control element comprising power headroom information for a first uplink carrier associated with the cell; determining whether a second carrier associated with the cell exists; and if so, providing a second control element from the user equipment to the network, the second control element comprising power headroom information for a second uplink carrier, wherein the first control element and the second control element are separate control elements.
The second uplink carrier may be configured for sounding reference signal transmission.
The power headroom information may include a power headroom report.
The second control element may include: the second control element includes an indication of power headroom information for a second uplink carrier.
The indication may include one of: logical channel identification, reserved bits or the position of the second control element relative to the first control element.
The second uplink carrier may be a supplemental uplink carrier.
In an eighth aspect, there is provided a computer program embodied on a non-transitory computer readable storage medium, the computer program comprising program code for controlling a process to perform a process comprising: receiving, at a network, a first control element from a user equipment, the first control element comprising power headroom information for a first uplink carrier associated with a cell; and if there is a second uplink carrier associated with the cell, receiving, at the network, a second control element from the user equipment, the second control element comprising power headroom information for the second uplink carrier, wherein the first control element and the second control element are separate control elements.
The second uplink carrier may be configured for sounding reference signal transmission.
The power headroom information may include a power headroom report.
The second control element may include: the second control element includes an indication of power headroom information for a second uplink carrier.
The indication may include one of: logical channel identification, reserved bits or the position of the second control element relative to the first control element.
The second uplink carrier may be a supplemental uplink carrier.
In a ninth aspect, there is provided a computer program product for a computer, the computer program product comprising software code portions for performing the method steps of the first or second aspect when the product is run on a computer.
In the foregoing, many different embodiments have been described. It should be appreciated that other embodiments may be provided by combinations of any two or more of the above embodiments.
Drawings
Embodiments will now be described, by way of example only, with reference to the accompanying drawings, in which:
FIG. 1 shows a schematic diagram of an example communication system including a base station and a plurality of communication devices;
FIG. 2 shows a schematic diagram of an example mobile communication device;
FIG. 3 illustrates a schematic diagram of an example control device;
FIG. 4 shows a schematic diagram of an example SUL architecture;
fig. 5 shows an example of a medium access control element (MAC CE);
fig. 6 shows an example of a MAC CE for a SUL;
fig. 7a shows an example of a MAC CE for a SUL;
Fig. 7b shows an example of a MAC CE for a SUL;
fig. 7c shows an example of a MAC CE for a SUL;
FIG. 8 illustrates a flow chart of an example method according to an embodiment;
FIG. 9 shows a flowchart of an example method according to an embodiment;
fig. 10 shows an example of a MAC CE according to an embodiment;
fig. 11 shows an example of a MAC CE according to an embodiment.
Detailed Description
Before explaining examples in detail, some general principles of wireless communication systems and mobile communication devices are briefly explained with reference to fig. 1 to 3 to help understand the basic technology of the described examples.
In a wireless communication system 100 such as that shown in fig. 1, mobile communication devices or User Equipment (UEs) 102, 104, 105 provide wireless access via at least one base station or similar wireless transmission and/or reception node or point. The base station is typically controlled by at least one suitable controller means to support its operation and to manage mobile communication devices communicating with the base station. The controller device may be located in a radio access network (e.g., wireless communication system 100) or in a Core Network (CN) (not shown) and may be implemented as one central device or its functionality may be distributed over multiple devices. The controller means may be part of the base station and/or provided by a separate entity such as a radio network controller. In fig. 1, control means 108 and 109 are shown as controlling the respective macro level base stations 106 and 107. The control means of the base station may be interconnected with other control entities. The control means are typically provided with a memory capacity and at least one data processor. The control means and functions may be distributed among a plurality of control units. In some systems, the control means may additionally or alternatively be provided in the radio network controller.
In fig. 1, base stations 106 and 107 are shown connected to a wider communication network 113 via gateway 112. Further gateway functions may be provided to connect to another network.
Smaller base stations 116, 118, and 120 may also be connected to network 113, for example, by separate gateway functions and/or via controllers of macro-level stations. The base stations 116, 118, and 120 may be micro-or femto-base stations, or the like. In the example, stations 116 and 118 are connected via gateway 111, while station 120 is connected via controller device 108. In some embodiments, smaller stations may not be provided. The smaller base stations 116, 118, and 120 may be part of a second network (e.g., WLAN) and may be WLAN APs.
The communication devices 102, 104, 105 may access a communication system based on various access technologies, such as Code Division Multiple Access (CDMA) or Wideband CDMA (WCDMA). Other non-limiting examples include Time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), and various schemes thereof, such as Interleaved Frequency Division Multiple Access (IFDMA), single carrier frequency division multiple access (SC-FDMA), and Orthogonal Frequency Division Multiple Access (OFDMA), space Division Multiple Access (SDMA), and the like.
An example of a wireless communication system is an architecture standardized by the third generation partnership project (3 GPP). The development based on the latest 3GPP is commonly referred to as Long Term Evolution (LTE) of the Universal Mobile Telecommunications System (UMTS) radio access technology. The various stages of development of the 3GPP specifications are referred to as releases. A newer development of LTE is often referred to as LTE-advanced (LTE-a). LTE employs a mobile architecture called evolved universal terrestrial radio access network (E-UTRAN). The base stations of such systems are known as evolved or enhanced node bs (enbs) and provide E-UTRAN features to the communication devices such as user plane packet data convergence/radio link control/medium access control/physical layer protocol (PDCP/RLC/MAC/PHY) and control plane Radio Resource Control (RRC) protocol termination. Other examples of radio access systems include those provided by base stations of systems based on technologies such as Wireless Local Area Network (WLAN) and/or WiMax (worldwide interoperability for microwave access). The base station may provide coverage for an entire cell or similar radio service area.
Examples of suitable communication systems are the 5G or NR concepts. The network architecture in NR may be similar to that of LTE-advanced. The base station of the NR system may be referred to as a next generation node B (gNB). The change in network architecture may depend on the requirements to support various radio technologies and better QoS support, as well as some on-demand requirements for QoS levels such as QoE supporting user angles. Moreover, network aware services and applications, as well as service and application aware networks, may bring about architectural changes. These are related to Information Center Networks (ICNs) and user-centric content delivery network (UC-CDN) approaches. NR may use multiple-input multiple-output (MIMO) antennas, more base stations or nodes than LTE (so-called small cell concept), including macro sites operating in cooperation with smaller stations, and may employ various radio technologies to obtain better coverage and higher data rates.
Future networks may use Network Function Virtualization (NFV), a network architecture concept that proposes virtualizing network node functions into "building blocks" or entities that may be operably connected or linked together to provide services. A Virtualized Network Function (VNF) may comprise one or more virtual machines running computer program code using standard or generic types of servers instead of custom hardware. Cloud computing or data storage may also be used. In radio communications, this may mean that the node operations are performed at least in part in a server, host, or node operatively coupled to the remote radio head. It is also possible that node operations will be distributed among multiple servers, nodes, or hosts. It should also be appreciated that the labor allocation between core network operation and base station operation may be different from LTE or even non-existent.
A possible mobile communication device will now be described in more detail with reference to fig. 2, fig. 2 showing a schematic partial cross-sectional view of a communication device 200. Such communication devices are often referred to as User Equipment (UE) or terminals. A suitable mobile communication device may be provided by any device capable of transmitting and receiving radio signals. Non-limiting examples include a Mobile Station (MS) or mobile device, such as a mobile phone or so-called 'smart phone', a computer provided with a wireless interface card or other wireless interface facility (e.g., a USB dongle), a Personal Digital Assistant (PDA) or tablet computer provided with wireless communication capabilities, or any combination of these, or the like. For example, a mobile communication device may provide data communications for carrying communications such as voice, electronic mail (email), text messages, multimedia, and the like. Many services can be offered and provided to users via their communication devices. Non-limiting examples of such services include bi-or multi-directional calls, data communications or multimedia services, or simply include access to a data communications network system, such as the internet. Broadcast or multicast data may also be provided to the user. Non-limiting examples of content include downloads, television and radio programming, video, advertising, various alerts, and other information.
The mobile device is typically provided with at least one data processing entity 201, at least one memory 202 and possibly other components 203 for software and hardware assistance in performing tasks designed to be performed, including controlling access to and communication with access systems and other communication devices. The data processing, storage and other associated control means may be provided on a suitable circuit board and/or in a chipset. This feature is indicated by reference numeral 204. The user may control the operation of the mobile device by means of a suitable user interface, such as a keypad 205, voice commands, touch sensitive screen or pad, combinations thereof, or the like. A display 208, speakers, and microphone may also be provided. In addition, the mobile communication device may include suitable connectors (wired or wireless) to other devices and/or for connecting external accessories (e.g., hands-free devices) thereto.
The mobile device 200 may receive signals over the air interface or radio interface 207 via appropriate means for receiving and may transmit signals via appropriate means for transmitting radio signals. In fig. 2, transceiver devices are schematically designated by block 206. For example, the transceiver device 206 may be provided by means of a radio and an associated antenna arrangement. The antenna arrangement may be arranged inside or outside the mobile device.
Fig. 3 shows an example of a control means for a communication system, e.g. a station, e.g. a base station, eNB or gNB or a node or server or host of a core network, e.g. MME or S-GW, coupled to and/or for controlling an access system, e.g. a RAN node. The method may be implanted in a single control device or on more than one control device. The control means may be integrated with or external to a node or module of the core network or RAN. In some embodiments, the base station includes a separate control device unit or module. In other embodiments, the control device may be another network element, such as a radio network controller or a spectrum controller. In some embodiments, each base station may have such control means and control means provided in the radio network controller. The control means 300 may be arranged to provide control of the communication in the service area of the system. The control device 300 comprises at least one memory 301, at least one data processing unit 302, 303 and an input/output interface 304. Via the interface, the control device may be coupled to a receiver and a transmitter of the base station. The receiver and/or transmitter may be implemented as a radio front-end or a remote radio head.
In order to improve Uplink (UL) coverage in high frequency scenarios, a Supplementary Uplink (SUL) may be configured. The SUL is modeled as another UL carrier of the same cell (i.e., there is only one DL carrier associated with that cell).
Fig. 4 shows a schematic representation of a SUL in which a UE 200 is configured with two UL carriers for one DL of the same cell 410.
Any one of the UL carriers may be used for UL transmission. In addition to this is a Sounding Reference Signal (SRS), which may be transmitted simultaneously in a carrier (UL carrier or SUL carrier) while data is being transmitted on another carrier. Uplink transmissions on both UL in the SUL are controlled by the network (e.g., through L1 signaling) to avoid overlapping Physical Uplink Shared Channel (PUSCH)/Physical Uplink Control Channel (PUCCH) transmissions in time. Overlapping transmissions on PUSCH may be avoided by scheduling, while overlapping transmissions on PUCCH may be avoided by configuration (i.e., PUCCH may be configured for only one of the two UL of the cell). In addition, initial access is supported in each of the two UL.
In the SUL, the default position of PUSCH is the same as the carrier used by PUCCH. UE-specific RRC signaling may be used to (re) configure the location of the PUCCH on the SUL carrier or non-SUL UL carrier in SUL band combination.
SRS may be configured on SUL carriers and non-SUL UL carriers regardless of carrier configuration for PUSCH and PUCCH. In the SUL band combining, RRC parameters related to SRS may be configured independently for SRS on SUL carriers and SRS on non-SUL UL carriers. The RRC configuration may include PUSCH, SRS, and power control information for each UL carrier, and a dedicated PUCCH for a single UL carrier.
That is, SRS transmission may occur independently of a carrier (UL or SUL) configuration in which PUSCH and PUCCH are transmitted, and thus may occur simultaneously.
The Power Headroom (PH) indicates how much transmit power is left for the UE in addition to the power being used for the current transmission. It has been agreed that the PH for SRS transmission can be reported to aid scheduler operation. SRS PH reporting (referred to as type 3PH reporting) for an uplink for which PUSCH is not configured may be supported. The SRS virtual PHR report may be based on one SRS resource configured by the NW.
A Power Headroom Report (PHR) may be included in the MAC CE. Type 1PH is used for PUSCH transmission, and type 3PH is used for SRS transmission (type 2 is used for PUSCH and PUCCH transmission). The margin is reported based on the actual transmission or the virtual transmission (when no actual transmission occurs during the transmission of reporting PHR, the margin is calculated based on the reference format).
Fig. 5 shows an example PHR MAC Control Element (CE) reporting type 1 and type 2PH with the highest ScellIndex of scells, with a configured uplink less than 8.PHR MAC CE may be defined as follows:
C i : the field indicatorPresence of PH field of secondary cell (Scell) with ScellIndex i. C set to "1 i The field indicates the PH field for reporting scells with ScellIndex i. "C set to" 0 i The field indicates that the PH field for Scell with ScellIndex i is not reported. The PH for the primary cell (Pcell) always exists, with no bits in the bitmap;
r: reserved bits, set to "0";
v: this field indicates whether the PH is based on the actual transmission or the reference format. For type 1ph, v=0 indicates actual transmission on PUSCH and v=1 indicates use of PUSCH reference format. For type 2ph, v=0 indicates actual transmission on PUCCH, and v=1 indicates use of PUCCH reference format. For type 3ph, v=0 indicates actual transmission on SRS, and v=1 indicates use of SRS reference format. Furthermore, v=0 indicates that there is a P containing association for type 1, type 2 and type 3ph CMAX,c Octets of the field and v=1 indicates that P containing the association is omitted CMAX,c Octets of the field;
power Headroom (PH): this field indicates the power headroom level. The length of this field is 6 bits.
P: this field indicates whether the MAC entity applies power backoff due to power management. If no power backoff due to power management is applied, the MAC entity should set: if corresponding P CMAX,c The fields will have different values, p=1;
P CMAX,c : if present, this field indicates the P used to calculate the previous PH field CMAX,c Or (b)
For the SUL case, a separate PH report (PHR) format may be required because SRS transmissions may be sent in the SUL/UL carrier while another carrier transmits PUSCH. Currently, type 1 and type 3 Power Headroom (PH) may not be reported simultaneously for the same cell. It would be desirable to report the capability of type 1PH and type 3PH in the same cell simultaneously.
Several options have been proposed.
In the case where UL and SUL can be configured with PUSCH, a new PHR MAC CE format has been proposed. Fig. 6 illustrates an example PHR MAC CE format for supporting per UL carrier PH reporting.
Since the NW may know whether the SUL carrier is configured for the Scell of the UE, a bitmap indication of the presence of the PH for a particular UL carrier may not be needed. UL carriers for a particular cell are stacked based on a pre-specified ordering, e.g., first SUL, then non-SUL, etc., similar to type 2PH. That is, in this option, the PH of two UL carriers for the same Scell are stacked according to UL carrier index known to the network.
However, in this proposal, the PHR format is created for the purpose of enabling type 1 and/or type 3PH of the SUL at the same time. When the SUL is configured, the PHR format may have an overhead of dual PH for a single cell, or when dual PH is reported during RRC reconfiguration, there may be ambiguity in the NW (e.g., depending on whether SRS is configured to report on UL/SUL when other carriers are used).
In an alternative proposal, P is due to the fact that the SUL carrier and the non-SUL carrier share the same cell index (due to the fact that they belong to the same serving cell) CMAX,c The "R" bit in the current PHR format in octets of (c) may be used to indicate whether one or more type 1PHR are to be followed for the same serving cell. The order of the carriers may be fixed in the specification.
An example type 1PHR format for a Pcell is shown in fig. 7a, and an example type 1 format for a PSCell is shown in fig. 7 b. The indicator field "E" is used to indicate that another type 1PHR exists for the same serving cell.
When one UL is configured with PUSCH and the other UL is configured with SRS, the same approach may be applicable to PHR MAC CE design. An indication field may be added to indicate the presence of type 1 or 3 PH. Fig. 7c shows an example MAC CE based on this method. The indicator bit is 1 indicating that there is a corresponding PH for that cell.
In this case, an additional PHR format may be defined to carry type 1PH and type 3PH for the same cell. When the PHR is triggered, type 1PH is always present in the MAC CE, but whether type 3PH is present depends on whether SRS transmission is configured on different carriers. An indicator field may be added to indicate the presence of type 3PH. To save these bits, R bits may be used. A length field L may be added in the MAC subheader to indicate the length of the MAC CE.
In the example described with reference to fig. 7a to 7c, the type 1PH is placed first and always present; the type x PH (x=1 or 3) immediately follows the type 1PH, and may not always exist. P which can be at type 1PH cmax An indicator field (e.g., "R1" or "E") is added to the byte to indicate the presence type xph (x=1 or 3).
However, in the method described with reference to fig. 7a to 7c, the PHR format is created for the purpose of implementing the SUL while enabling the type 3PH. Since the indicator field is always required, no optimization currently in the MAC specification cannot be used whether or not a further PHR for the same cell is reported, wherein if a virtual PH is reported, inclusion of P may be omitted cmax Is a byte of (b). That is, this option may increase overhead.
Another approach for PHR MAC CE design may be to reuse the current PHR format of the DC (multi-entry PHR MAC CE). A separate ScellIndex may be configured for the SUL carrier. There may not be enough Scell index to cover all combinations. Since the SUL and UL carriers are from the same cell, different cell indexes may not be appropriate because the bit map of the PHR format will also need to be extended.
Fig. 8 illustrates a flow chart of an example method that may allow type 1 and type 3PH reporting for a single serving cell simultaneously.
In a first step S1, the method comprises providing a first control element from the user equipment network, the first control element comprising power headroom information for a first uplink carrier associated with the cell.
In a second step S2, the method comprises determining whether a second carrier associated with the cell is present. This step may additionally include determining whether the second uplink carrier is configured with SRS resources.
In a third step S3, the method comprises providing a second control element from the user equipment to the network, the second control element comprising power headroom information for a second uplink carrier, wherein the first control element and the second control element are separate control elements. The first and second control elements may be MAC CEs. Individual MAC CEs may be included in the same MAC PDU.
Fig. 9 shows a flow chart of an example method that may allow type 1 and type 3PH reporting to occur simultaneously for a single serving cell.
In a first step T1, the method comprises receiving, at the network, a first control element from the user equipment, the first control element comprising power headroom information for a first uplink carrier associated with the cell.
In a second step T2, the method comprises receiving, at the network, a second control element from the user equipment, the second control element comprising power headroom information for the second uplink carrier, if there is a second uplink carrier associated with the cell, wherein the first control element and the second control element are separate control elements. The first and second control elements may be MAC CEs. Individual MAC CEs may be included in the same MAC PDU.
The method described with reference to fig. 8 may be performed at a user equipment. The method described with reference to fig. 9 may be performed at a node of a network, e.g., an eNB, a gNB, or a cloud RAN.
The second uplink carrier may be a SUL carrier. The second uplink carrier may be configured for SRS.
The method described with reference to fig. 8 and 9 provides separate MAC CEs for type 1 (including "generic PHR" of all cells, i.e., no PH of type 3PH for cells configured with SUL) and type 3PH (reporting serving cells only as needed). The same MAC CE format may be applied to both.
Individual MAC CEs with the same format may be defined for the SUL of all cells without affecting the original MAC CE without a SUL. The individual MAC CEs may contain SUL carriers of type 1PH or type 3PH (depending on whether PUSCH or SRS is configured on the SUL carrier) and/or actual or virtual values (depending on whether there is an actual PUSCH/SRS transmission when reporting the PHR). If PUSCH or SRS is not configured on the UL carrier of the serving cell, the MAC CE without SUL does not report type 1 for PUSCH or type 3 for SRS.
If the uplink carrier (UL or SUL) is configured with SRS reporting and the carrier is not the current "active" carrier, i.e. no PUSCH/PUCCH transmission is made, the UE reports type 3PH for the given serving cell (NW may determine PH based on the PUSCH type 1 report due to the active carrier).
The second control element may include: the second control element includes an indication of power headroom information for a second uplink carrier. The indication may include one of: logical channel identification, reserved bits or the position of the second control element relative to the first control element.
For example, the NW may determine whether the MAC Ce is for a generic PHR or for type 3PH only, or alternatively for PHR of the SUL, based on the indicated individual LCID values, reserved bits in the cell index space of the PHR format, or the order in which the MAC CEs are multiplexed within the MAC PDU. For example, if any active serving cell is configured with a SUL, the generic PHR may always be multiplexed first, and the second PH MAC CE will follow.
Only when needed by a cell configured with a SUL may the PHR MAC CE for the SUL be indicated with a separate LCID and bitmap.
The presence of a Pcell type 3PH report may also be explicitly indicated based on the R bits for the cell index.
The generic PHR format may also be applied to type 3PH reports. Fig. 10 shows a multi-entry PHR MAC CE format for reporting a maximum of seven scells of type 3PH. The format is based on the MAC CE format described with reference to fig. 5.
Using a separate MAC CE for the SUL means that the type 3PH is reported only when needed. If virtual PH is reported (for general PHR and type 3 dedicated PHR), then it can be omitted all the timeP cmax Fields because no further PHR indication is needed. This may mitigate the overhead introduced.
The same Scell index may be used to indicate UL and SUL for the same cell (considering that the reporting is separate).
Ambiguity may not be introduced in the NW when the UE shall report both type 1 and type 3 for which serving cell.
Fig. 11 shows an example of a multi-entry PHR MAC CE with the highest ScellIndex of scells, where the configured uplink is less than 8 for type 1/3PH reporting with SUL. The MAC CE in fig. 11 is an example of a PHR format, in which the PH of the SUL includes type 1PH and type 3PH of the SUL in a separate MAC CE, depending on whether PUSCH or SRS (x=1 or 3) is configured on the SUL. The PHR of the non-SUL carrier may be included in a separate PHR MAC CE in the same MAC PDU. When type 1PH of the SUL for the serving cell is included in the PHR MAC CE, it is not necessary for another MAC CE to be included. Alternatively, the virtual PH may be reported for another MAC CE. When no actual PUSCH transmission is scheduled on both UL and SUL carriers, it may be specified that virtual type 1 is reported only for UL carriers.
The PHR MAC CE format may include bitmaps for scelllndime of different sizes (e.g., 0, 8, or 32). The bitmap may have different sizes for the first PHR MAC CE and the second PHR MAC CE.
Individual PHR MAC CEs in the same MAC PDU may also be applicable to other use cases, for example, sTTI (shorter transmission time interval) when multiple PHs of the same type are to be reported for the same cell, even though they are on the same carrier. In this aspect, an example method may include: providing a first control element from the user equipment to the network, the first control element comprising power headroom information for a first TT1 of the carrier; determining whether a second TTI on the carrier requires a different PH type than the first TT 1; and, if so, providing a second control element from the user equipment to the network, the second control element comprising power headroom information for a second TTI, wherein the first control element and the second control element are separate control elements.
The method may be implemented in the user equipment described with reference to fig. 2 or in the control device described with reference to fig. 3. The control functions may include: providing a first control element from the user equipment to the network, the first control element comprising power headroom information for a first uplink carrier associated with the cell; determining whether a second carrier associated with the cell exists; and providing a second control element from the user equipment to the network, the second control element comprising power headroom information for a second uplink carrier, if present, wherein the first control element and the second control element are separate control elements.
Alternatively or additionally, the control function may include: receiving, at a network, a first control element from a user equipment, the first control element comprising power headroom information for a first uplink carrier associated with a cell; and if there is a second uplink carrier associated with the cell, receiving, at the network, a second control element from the user equipment, the second control element comprising power headroom information for the second uplink carrier, wherein the first control element and the second control element are separate control elements.
It should be understood that the apparatus may include or be coupled to other units or modules, etc., such as a radio or a radio head, for use in or for transmission and/or reception. Although the apparatus has been described as one entity, the different modules and memories may be implemented in one or more physical or logical entities.
Note that although the embodiments have been described in relation to SUL in NR, similar principles may be applied in relation to other networks and communication systems where the serving cell has more than one uplink carrier or where more than one type of PH is to be reported for the serving cell. Thus, although certain embodiments are described above by way of example with reference to certain example architectures of wireless networks, technologies and standards, the embodiments may be applied to any other suitable form of communication system than those illustrated and described herein.
It is also noted herein that while the above describes exemplifying embodiments, there are several variations and modifications which may be made to the disclosed solution without departing from the scope of the present invention.
In general, the various embodiments may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects of the invention may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the invention is not limited thereto. While various aspects of the invention may be illustrated and described as block diagrams, flow charts, or using some other pictorial representation, it is well understood that these blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
Embodiments of the invention may be implemented by computer software executable by a data processor of a mobile device, such as in a processor entity, or by hardware, or by a combination of software and hardware. Computer software or programs (also referred to as program code, including software routines, applets, and/or macros) can be stored in any apparatus-readable data storage medium and they include program instructions to perform particular tasks. The computer program product may include one or more computer-executable components configured to perform embodiments when the program is run. The one or more computer-executable components may be at least one software code or portion thereof.
Further in this regard, it should be noted that any blocks of logic flows as in the figures may represent program steps or interconnected logic circuits, blocks and functions, or a combination of program steps and logic circuits, blocks and functions. The software may be stored on such physical media as a memory chip, or a memory block implemented within the processor, magnetic memory such as a hard disk or floppy disk, and optical memory such as, for example, a DVD and its data variants CD. The physical medium is a non-transitory medium.
The memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory, and removable memory. The data processor may be of any type suitable to the local technical environment and may include, as non-limiting examples, one or more of a general purpose computer, a special purpose computer, a microprocessor, a Data Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an FPGA, a gate level circuit, and a processor based on a multi-core processor architecture.
Embodiments of the invention may be practiced in various components such as integrated circuit modules. The design of integrated circuits is generally a highly automated process. Complex and powerful software tools are available for converting a logic level design into a semiconductor circuit design ready to be etched and formed on a semiconductor substrate.
The foregoing description provides a complete and informative description of exemplary embodiments of the invention, by way of non-limiting example. However, various modifications and adaptations may become apparent to those skilled in the relevant arts in view of the foregoing description, when read in conjunction with the accompanying drawings and the appended claims. However, all such modifications and similar thereto of the teachings of this invention will still fall within the scope of the invention that is defined in the appended claims. Indeed, there is still another embodiment that includes a combination of one or more embodiments with any of the other embodiments previously discussed.
Claims (14)
1. A method of communication, comprising:
providing a first control element from a user equipment to a network, the first control element comprising power headroom information for a first uplink carrier associated with a cell;
determining whether a second uplink carrier associated with the cell exists; and, if present,
Providing a second control element from the user equipment to the network, the second control element comprising power headroom information for the second uplink carrier, wherein the first control element and the second control element are separate control elements, wherein the second control element comprises an indication of power headroom information for the second uplink carrier, the indication comprising a position of the second control element relative to the first control element, and
wherein the presence of the second control element is indicated based on a first bit of an index to the cell.
2. The method of claim 1, wherein the second uplink carrier is configured for sounding reference signal transmission.
3. The method of claim 1, wherein the power headroom information comprises a power headroom report.
4. The method of claim 1, wherein the indication further comprises one of: logical channel identification or reserved bits.
5. The method of any of claims 1-4, wherein the second uplink carrier is a supplemental uplink carrier.
6. A method of communication, the method comprising:
Receiving, at a network, a first control element from a user equipment, the first control element comprising power headroom information for a first uplink carrier associated with a cell; and
receiving, at the network, a second control element from the user equipment if there is a second uplink carrier associated with the cell, the second control element comprising power headroom information for the second uplink carrier, wherein the first control element and the second control element are separate control elements, wherein the second control element comprises an indication of power headroom information for the second uplink carrier, the indication comprising a position of the second control element relative to the first control element, and
wherein the presence of the second control element is indicated based on a first bit of an index to the cell.
7. The method of claim 6, wherein the second uplink carrier is configured for sounding reference signal transmission.
8. The method of claim 6, wherein the power headroom information comprises a power headroom report.
9. The method of claim 6, wherein the indication comprises at least one of: logical channel identification or reserved bits.
10. The method according to any of claims 6 to 9, wherein the second uplink carrier is a supplementary uplink carrier.
11. An apparatus for communication comprising means for performing the method of any one of claims 1 to 5 or 6 to 10.
12. A computer readable storage medium having stored thereon program code configured to, when executed, cause an apparatus to perform the method of any of claims 1 to 5 or 6 to 10.
13. An apparatus for communication, 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 apparatus at least to:
providing a first control element from a user equipment to a network, the first control element comprising power headroom information for a first uplink carrier associated with a cell;
determining whether a second uplink carrier associated with the cell exists; and, if present,
providing a second control element from the user equipment to the network, the second control element comprising power headroom information for the second uplink carrier, wherein the first control element and the second control element are separate control elements, wherein the second control element comprises an indication of power headroom information for the second uplink carrier, the indication comprising a position of the second control element relative to the first control element, and
Wherein the presence of the second control element is indicated based on a first bit of an index to the cell.
14. An apparatus for communication, 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 apparatus at least to:
receiving, at a network, a first control element from a user equipment, the first control element comprising power headroom information for a first uplink carrier associated with a cell;
and if there is a second uplink carrier associated with the cell, receiving, at the network, a second control element from the user equipment, the second control element comprising power headroom information for the second uplink carrier, wherein the first control element and the second control element are separate control elements, wherein the second control element comprises an indication of power headroom information for the second uplink carrier, the indication comprising a position of the second control element relative to the first control element, and
Wherein the presence of the second control element is indicated based on a first bit of an index to the cell.
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| PCT/CN2018/076880 WO2019157738A1 (en) | 2018-02-14 | 2018-02-14 | Method, apparatus and computer program |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103314622A (en) * | 2010-11-05 | 2013-09-18 | 瑞典爱立信有限公司 | Power headroom control element, method of communicating power information from user equipment, method for processing received power information as well as corresponding user equipment and base station |
| CN104796940A (en) * | 2014-01-20 | 2015-07-22 | 中兴通讯股份有限公司 | PHR (Power Headroom Report) reporting method and device |
| CN105393610A (en) * | 2013-12-20 | 2016-03-09 | Lg电子株式会社 | Method for power headroom reporting and device therefor |
| CN107431985A (en) * | 2015-03-31 | 2017-12-01 | 株式会社Ntt都科摩 | User terminal, wireless base station and wireless communications method |
-
2018
- 2018-02-14 WO PCT/CN2018/076880 patent/WO2019157738A1/en active Application Filing
- 2018-02-14 CN CN201880091775.0A patent/CN111903159B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103314622A (en) * | 2010-11-05 | 2013-09-18 | 瑞典爱立信有限公司 | Power headroom control element, method of communicating power information from user equipment, method for processing received power information as well as corresponding user equipment and base station |
| CN105393610A (en) * | 2013-12-20 | 2016-03-09 | Lg电子株式会社 | Method for power headroom reporting and device therefor |
| CN105830507A (en) * | 2013-12-20 | 2016-08-03 | Lg电子株式会社 | Method for power headroom reporting and device therefor |
| CN104796940A (en) * | 2014-01-20 | 2015-07-22 | 中兴通讯股份有限公司 | PHR (Power Headroom Report) reporting method and device |
| CN107431985A (en) * | 2015-03-31 | 2017-12-01 | 株式会社Ntt都科摩 | User terminal, wireless base station and wireless communications method |
Non-Patent Citations (2)
| Title |
|---|
| "PHR Format for SUL";ERICSSON;《3GPP TSG-RAN WG2 #AH NR 1801 Tdoc R2-1800343》;20180112;第1-3节 * |
| "Remaining Stage-2 Issues of SUL Carrier for EN-DC";VIVO 等;《3GPP TSG-RAN WG2 Meeting #100 R2-1712999》;20171117;全文 * |
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