JP6734353B2 - Communication in wireless systems - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to communications in wireless communication systems, and more particularly to transmissions in wireless communication systems configured for scheduled transmissions.

A communication system can be thought of as a facility that enables communication between two or more nodes, such as fixed or mobile communication devices, and access points, such as base stations, servers, machine type devices. Communication systems and compatible communicating entities typically operate in accordance with a given standard or specification specifying what the various entities associated with the system are allowed to do and how to accomplish that. For example, standards, specifications and associated protocols define how communication between communication devices and access points should be arranged, how various aspects of communication should be provided, and how equipment should be configured. be able to.

The signal may be carried on a wired or wireless carrier. Examples of wireless systems include terrestrial public mobile communication networks (PLMNs), such as cellular networks, satellite based communication systems and different wireless local networks, such as wireless local area networks (WLANs). Wireless systems can be divided into coverage areas called cells, and as such, wireless systems are often referred to as cellular systems. A base station can provide one or more cells, and there are various types of base stations and cells.

The user can access the communication system using a suitable communication device or terminal. Communication devices are typically used to enable receipt and transmission of communications such as voice and data. Communication devices are typically provided with suitable signals for receiving and transmitting arrangements to enable communication with other persons skilled in the art. The communication device can access a carrier provided by the base station and transmit and/or receive communication on the carrier.

Transmission to the receiving device can be based on scheduling. In scheduled wireless systems, periodic paging techniques are often used to save energy at the recipient device. The recipient device need only be briefly activated during each cycle, while remaining inactive for the rest of the time. Two commonly used mechanisms for this purpose are idle mode and sleep mode. During the active cycle, the receiving device checks for incoming paging messages from the network. This principle of being able to switch between active and inactive states allows the recipient device to save power while the network is still available in the case of network traffic, such as when a phone call arrives. To

Modern networks typically have two levels of "paging". A "regular" paging procedure is when the recipient communication device is connected in idle mode rather than active mode. In lightweight paging mode, the communication device is in connected mode, while in discontinuous reception mode, the communication device is listening periodically for scheduling grants.

However, paging periodicity can present problems in several respects. For example, if the incoming traffic is not periodic, periodic paging can lead to packet delays, especially if the period is too long. In general, the average packet delay for random incoming traffic instants corresponds to half the time between paging instants. If the device is in active mode but does not receive paging messages, and in particular if the period is too short, energy can be wasted at the recipient communication device.

It is pointed out that the above problems are not limited to any particular communication environment and station equipment, but may occur in any suitable system.

Embodiments of the present invention are directed to addressing one or more of the problems set forth above.

According to one embodiment, a method of controlling at least one device of a scheduled system configured to receive scheduled frequency resources, the scheduling for at least one device in an inactive mode. Allocating secondary frequency resources independent of the scheduling of the scheduled system, and for controlling at least one device in an inactive mode to control the reception of the scheduled frequency resources Transmitting a signal on the resource.

According to one embodiment, a method of controlling a device configured to receive a scheduled frequency resource of a scheduled system, the method being independent of the scheduling of the scheduled system when the device is inactive. And receiving a signal on the secondary frequency resource, and controlling the reception of the scheduled frequency resource based on the signal.

According to one embodiment, at least one processor and computer program code in an apparatus for controlling at least one device configured to receive scheduled frequency resources in a scheduled system. An apparatus including at least one memory, the at least one memory and computer program code, together with at least one processor, independent of scheduling of a scheduled system for at least one device in an inactive mode. And allocating secondary frequency resources in a distributed manner and transmitting signals on the secondary frequency resources to at least one device in an inactive mode for controlling reception of scheduled frequency resources. An apparatus is provided that is configured as follows.

According to one embodiment, receiving the scheduled frequency resources of the scheduled system and receiving the signal on the secondary frequency resource independently of the scheduling of the scheduled system when the device is inactive. An apparatus for a device configured to control reception of scheduled frequency resources based on a signal is provided.

According to a more specific embodiment, when the first receiver function is in the inactive mode, the second receiver function is configured to receive the secondary frequency resource based on the signal, as compared to the second receiver function. A first receiver function operating with wide bandwidth or based on a different radio access technology is controlled.

The scheduled frequency resource may include at least one resource unit, the resource unit includes a first frequency resource, and the secondary frequency resource is a second frequency resource that is less than the first frequency resource in the one resource unit. Including frequency resources of. The resource unit may include a physical resource block of an Orthogonal Frequency Division Multiplexing (OFDM) system.

Information about secondary resources can be communicated. The information can be transmitted in system information messages or via dedicated signaling. This information may include at least one of user equipment identification and paging information.

Secondary frequency resources may include at least one subcarrier in an Orthogonal Frequency Division Multiplexing (OFDM) system. Secondary frequency resources may be included, at least in part, within the scheduled frequency resources. The secondary resource may include the DC subcarrier of the OFDM system.

The signal to be transmitted on the scheduled resource can be muted and the signal replaced by a secondary signal.

Based on the information about the secondary resources, encoding and/or rate matching of the data to be transmitted on the scheduled resources can be provided. The signal may be modulated by a binary sequence. The binary sequence may be one of multiple binary sequences. One or more of the plurality of binary sequences may be reserved as a means for communicating secondary frequency resource related information.

The signals on the secondary frequency resources may include signals to wake up a function to receive the scheduled resources.

A computer program including program code means adapted for carrying out the methods described herein may also be provided. According to a further embodiment, there is provided an apparatus and/or computer program product executable on a computer-readable medium to provide at least one of the methods described above.

A network node such as a controller entity or base station for controlling transmission within an area or otherwise controlling operation within an area according to at least some of the embodiments. Can be configured to operate. Communication systems implementing the apparatus and principles of the present invention may be provided as well.

It should be appreciated that any feature of any aspect may be combined with any other feature of any other aspect.

Embodiments will now be described in more detail, by way of example only, with reference to the following examples and accompanying drawings.

1 shows a schematic diagram of a cellular system in which some embodiments may be implemented. 3 shows a schematic diagram of a control device according to some embodiments. 1 shows a schematic presentation of a possible communication device with two receivers. 6 is a flow chart according to certain embodiments. An example of a resource unit is shown. 2 shows an example of a two-receiver device. FIG. 6 shows an illustrative block diagram of a receiver device. A comparison between DRX and event-based reception. It illustrates the difference between a scenario in which only signals scheduled for transmission are generated and a scenario in which scheduled signals and secondary signals are combined for transmission. It illustrates the difference between a scenario in which only signals scheduled for transmission are generated and a scenario in which scheduled signals and secondary signals are combined for transmission.

In the following, some illustrative embodiments are described with reference to a wireless or mobile communication system serving a mobile communication device. Before describing the illustrative embodiments in detail, some general principles of a wireless communication system, its access system, and mobile communication devices are provided to aid in understanding the technology underlying the described embodiments. Briefly explained.

A non-limiting example of recent advances in communication system architecture is Universal Mobile Telecommunications System (UMTS) Long Term Evolution (LTE), which is being standardized by the Third Generation Partnership Project (3GPP). .. LTE utilizes a mobile architecture known as Evolved Universal Terrestrial Radio Access Network (E-UTRAN). The base stations of such a system are known as evolved or enhanced NodeBs (eNodeBs, eNBs) and have E-UTRAN features such as user plane radio link control/medium access control/physical layer protocol (RLC/MAC/PHY). ) And control plane radio resource control (RRC) protocol terminations can be provided to the communication device. Other examples of wireless access systems include those provided by base stations for technologies such as wireless local area networks (WLANs) and/or technologies such as Wimax (World wide interoperability for Microwave Access).

The communication device or terminal 1 may be provided with radio access via a base station or similar radio transmitter and/or receiver node providing a radio coverage area or cell. FIG. 1 shows four base stations 11, 13, 15 and 17, but these are shown for illustrative purposes only and may provide a greater or lesser number of base station sites. Is also pointed out. A base station site can serve one or more cells or sectors. One sector can provide one cell or one subarea of one cell. It is thus recognized that the number, size and shape of cells can vary widely.

Communication within the base station and thus within the cell is typically controlled by at least one suitable controller unit to enable its operation and to manage mobile communication devices in communication with the base station. The controller may be interconnected with other control entities. The controller may typically be equipped with storage capacity and at least one data processor. Controllers and functions may be distributed among multiple control units. In some embodiments, each base station may include one controller. In alternative embodiments, two or more base stations may share the controller. For example, in LTE, a given eNB typically controls multiple cells.

Different types of possible cells include those known as macrocells, picocells and femtocells. For example, a transmission/reception point or base station may include a wide area network node such as a macro eNodeB (eNB) that may provide coverage or similar wireless coverage for an entire cell, for example. The base station may also be provided with small or local wireless service area network nodes, eg Home eNBs (HeNBs), pico eNodeBs (pico-eNBs) or femto nodes. In some applications, for example, a radio remote head (RRH, shown as 15 in the example) connected to one eNB (shown as 11 in the example) is used.

The base station and associated controller may communicate through one another via fixed circuit connections and/or air interfaces. The logical connection between the base station nodes can be provided by, for example, the X2 interface. In FIG. 1, this interface is indicated by the dashed line shown at 20.

FIG. 2 shows an example of a controller for a node, eg to be integrated with, to be coupled to and/or otherwise control any of the base stations. Controller 30 may be configured to provide control over communications within the coverage area of the base station site. Controller 30 may be configured to provide control functions in combination with the scheduled distribution of transmissions. The controller may also be configured for secondary resource allocation according to some embodiments described below. For this purpose, the control device comprises at least one memory 31, at least one data processing unit 32, 33 and an input/output interface 34. Via the interface, the controller can be coupled to at least one receiver and at least one transmitter of the base station. The controller may be configured to execute the appropriate software code to provide the control function. It will be appreciated that similar components may be provided within a controller provided elsewhere in the system, such as within entity 24 of FIG. 1, for example.

Communication device 1 may include any suitable device capable of receiving at least wireless communication of data. For example, the terminal may be a portable data processing device equipped with a wireless receiver, data processing and user interface devices. By way of non-limiting example, a mobile station (MS), for example what is known as a mobile phone or "smartphone", a portable computer, for example a laptop computer equipped with a wireless interface card or other wireless interface equipment. , Tablet computers, personal digital assistants (PDAs) with wireless communication capabilities, or any combination thereof. Further examples include wearable wireless devices, such as wristwatches, smart watches, eyewear, helmets, hats, clothes, earphones with wireless connectivity, jewelery and other integrated devices, universal wireless capabilities. These include serial bus (USB) sticks, modem data cards or any combination thereof. A user's communication device is often referred to as user equipment (UE).

FIG. 3 is a schematic, partially cross-sectional view of a possible communication device. More particularly, a portable or otherwise mobile communication device 1 is shown. Mobile communication devices are equipped with wireless communication capabilities and appropriate electronic controls to enable their operation in accordance with the principles described herein. Thus, the mobile device 1 includes at least one data processing entity 6, such as a central processing unit and a central processing unit, for use in performing the tasks it is designed to perform with the aid of software and hardware. /Or core processor, at least one memory 8 and other possible components, such as an additional processor 5 and memory 9, are shown. Data processing, storage and other related controls can be provided on a suitable circuit board 7 and/or in a chipset. The data processing and memory functions provided by the controller of the mobile device are configured to cause control and signaling operations according to some embodiments of the invention, as described in subsequent portions of this specification. ing. The user may control the operation of the mobile device with a suitable user interface such as a touch sensitive display screen or pad 4 and/or a keypad, actuator buttons, voice commands, combinations thereof and the like. Speakers and microphones are typically included as well. In addition, the mobile communication device may include suitable connectors (either wired or wireless) for connecting to it external accessories, such as hands-free equipment, and/or for connecting to other devices. ..

Mobile devices may communicate wirelessly with other devices via suitable equipment for receiving and transmitting signals. In some embodiments, at least two different types of receiver devices can be included. Thus, FIG. 3 schematically shows two radio blocks 2 and 3 connected to the controller of the device. The radio block may include radio components and associated antenna arrangements. The antenna arrangement can be arranged inside or outside the mobile device and can be shared by the wireless devices 2 and 3. According to one embodiment, the device 2 provides the main transceiver of the mobile device 1 and the device 3 provides the secondary receiver.

Given the functionality of the primary and secondary receivers, it is pointed out that these functionality may also be provided by one receiver device. Thus, instead of the two physically separate receivers of FIG. 3, it is possible to have only one receiver device, which receiver device receives the scheduled transmission and the secondary transmission. It is arranged.

A secondary channel may be provided for reception by the secondary channel receiver of the communication device. In the following, the embodiments are described in relation to an event-based paging mechanism that can act as a self-sustaining or in conjunction with the periodic paging principle.

According to a more specific embodiment, a pre-paging message relating to the actual paging message is transmitted to the secondary receiver function of the receiving device with the main receiver function inactive, whereby Be received. At this time, the secondary receiver function notifies the main transceiver function of the actual paging incoming message. Thus, the main receiver function can be activated in response to the pre-paging message and can receive the actual paging message.

The flowchart of FIG. 4 illustrates, for example, transmission by a base station to a communication device within its coverage area to control at least one device configured to receive scheduled frequency resources of a scheduled system, 3 illustrates an example use of a secondary channel in a communication system, which is scheduled according to a predetermined scheduling algorithm. In this method, at 40, secondary frequency resources are allocated to at least one device in an inactive mode, independent of a predetermined scheduling of the scheduled system. Thereafter, at 42, a signal is transmitted to at least one device in the inactive mode to control reception of scheduled frequency resources on the secondary frequency resource.

FIG. 4 further illustrates steps 44 and 46 performed within the inactive communication device. At 44, the device receives a signal on the secondary frequency resource in a manner independent of the scheduling of the scheduled system. Reception of the scheduled frequency resources may then be controlled at 46 based on the signals communicated on the secondary resources.

According to one embodiment, this signal operates in a wider bandwidth than the second receiver function configured to receive the secondary frequency resource when the first receiver function is in the inactive mode. It can be used to control the first receiver function. According to another embodiment, the signals are communicated based on different radio access technologies.

The signal is received by the secondary channel receiver function of the device in a mode where the scheduled frequency resource receiver function is not active. Receiver functionality may be provided by a single physical receiver device or by separate receivers.

The scheduled frequency resource may include at least one resource unit, the resource unit including a first frequency resource. Secondary frequency resources include a second frequency resource that is less than the first frequency resource in a resource unit. The size is predetermined and is typically the minimum number of frequency resources that can be scheduled for transmission within a given scheduled system. For example, the resource unit may be a physical resource block (PRB) of an Orthogonal Frequency Division Multiplexing (OFDM) system and the second frequency resource may include a portion of the OFDM PRB.

At least one device in the inactive mode may be provided with information about secondary resources. Such information may be transmitted, for example, in system information (SI) messages. According to one possibility, this arrangement is communicated to the device via dedicated signaling, eg using Radio Resource Control (RRC) signaling.

According to one embodiment, receipt of a signal by the secondary resource receiver function at 44 triggers the transmission of an internal interrupt signal to the main receiver function. In response to the internal signal being more triggered by the reception of the signal on the secondary resource, the reception of the scheduled resource is activated and thus the incoming data can be received. This data may include periodic paging messages or any other data.

In connected mode, the communication device knows the timing of the system. However, if the communication device is in an inactive mode and scanning only possible secondary signals such as wake-up signals, the device may not know the timing of the system.

According to one embodiment, the first or main receiver operates with a wider bandwidth than the secondary receiver, making the first receiver more complex. The use of higher bandwidth requires higher sampling rates as well as, for example, more accurate and more power consuming clocks. The use of wide bandwidth may also increase the power consumption of other RF components. Thus, according to one embodiment, narrowband signals are introduced into a scheduled wireless system for detection and use by a low power secondary receiver. The use of narrowband signals can be advantageous because it requires low power components that can be used with low sample rates in the secondary receiver.

Narrowband transmission can be realized using an in-band transmission scheme that does not require an additional transmitter.

One possible scenario is Orthogonal Frequency Division Multiplexing (OFDM)-based air (for example used in LTE and LTE-A and also likely to be available for future systems that use OFDM for access). Disclose methods for implementing secondary resources within a subset of OFDM resources that are interface related. The OFDM channel can be divided into multiple Physical Resource Blocks (PRBs). Each PRB is composed of a fixed number of subcarriers over a fixed duration. For example, in LTE, the PRB spans 12 subcarriers and stores 14 OFDM symbols within a 1 ms transmission time interval (for normal cyclic prefix operation). Usually, the subcarriers of an OFDM system are grouped together to contain a set of resources that can be allocated to users during a certain time period. The PRB contains a certain number of sub-carriers (eg 12, meaning a total bandwidth of 180 kHz) in one transmission time interval (TTI). An example of PRB 50 with 12 subcarriers 51 is illustrated in FIG. It should be appreciated that this is only an example, for example for the 5th generation (5G) concept, a larger PRB of around 10 MHz is proposed.

If the concept of a secondary receiver adapted to receive unscheduled signals according to the scheduling of the scheduled wireless system is adapted to the scheduled wireless system, the secondary channel signal is It can be distributed within the bandwidth of the transmission site along with the data and control channels. If the entire PRB is distributed to one secondary signal, eg wake up or other interrupt signal, this can impact the system's capability and/or hardware complexity. Therefore, only a small subset of subcarriers are used and dedicated to the secondary channel. The number of sub-carriers within one system bandwidth is usually large, so the addition of these subsets will be a small throughput, especially if only a limited part of the subset is dedicated to such secondary channels. Expected to lead only to a decline. However, according to the existing LTE standard, the smallest resource that can be allocated is the PRB (ie 12 subcarriers). Therefore, it may be necessary to change the standard in this respect.

Instead of using the same access technology and in-band secondary signal, another Radio Access Technology (RAT) can be used to provide the out-of-band secondary signal. Thus, for example, the wake-up signal is transmitted using another RAT that can be based on a standard tailored for low power consumption for the purpose of controlling the receiver function of the scheduled resources of the scheduled system. It is possible to receive it. According to one scenario, a scheduled cellular system is complemented by a non-cellular system to provide a secondary signal. Examples of RATs for communicating secondary signals include various short-range wireless systems, wireless local area networks (WLANs), and remote control systems. Specific commercially available examples of such systems are Bluetooth®, Wi-Fi®, ZigBee® and Z-Wave®. In the embodiment of FIG. 1, the signal may be transmitted to mobile device 1 on a secondary resource provided by base station 17. The scheduled resources can be transmitted by the base station 11 of the cellular system.

Operation of the first receiver and/or device is controllable based on the signal received by the secondary receiver.

An example of a receiver arrangement 60 including a first receiver or main receiver 62 and a secondary channel receiver 63 is shown in FIG. The secondary channel can be received, for example, by a tunable narrowband filter or by mixing to an intermediate frequency to which a fixed narrowband filter can be applied. Secondary channel transmitters may rely on the use of on-off keying, which basically modulates the signal by tuning the carrier on and off according to a predetermined binary sequence (eg, Gold sequence) with excellent cross-correlation properties. By detecting the carrier state with an envelope detector, the bit pattern can be received and correlated with a receiver-specific sequence (ID). By using multiple parallel correlators, each applying a 1-bit shifted sequence, there is no need for power consuming radio frequency (RF) local oscillation (LO), so that synchronization to the bit sequence is avoided. The need can be avoided.

FIG. 7 shows an example of such an implementation. Robustness to interference can be achieved by exploiting the autocorrelation and cross-correlation properties of selected binary sequences.

According to an exemplary embodiment, one subcarrier according to 3GPP LTE Standard Release 8 is used. Such subcarriers span 15 kHz in the frequency domain and 14 symbols in the time domain. With overhead included, this covers 1 ms. If the sequence is realized using one LTE symbol per bit, then a clock frequency input to the correlator equal to the symbol frequency (15 kHz) is required. This should result in low power consumption and still lead to a sequence with 2 ^∧ 14 possible signaling states. Some states can be reserved for "coding robustness", while the rest can be used to provide some unique identity information (IDs). Another example is to use the same frequency resource in consecutive TTIs. This allows more symbols to improve robustness or the number of IDs.

The base station can inform the communication device about its assigned identity (ID) and the recipient communication device can then switch off its primary receiver and activate the secondary receiver. .. Further, the device and base station may need to agree on the sub-carriers used for the signals that the secondary receiver should receive. This can be provided by using a periodic control signaling/configuration mechanism.

A more specific example of the use of secondary resources in a scheduled system will now be shown in the context of a wake-up receiver (WuRx) and FIGS. 6 and 7. With this concept, a master node or access point (AP) can wake up a particular node whenever needed to provide event-based reception triggering. A secondary low power receiver 63 (wake up receiver) capable of detecting the particular wake up signal transmitted by the master node is available. Internal signal 64 from secondary receiver 63 to main receiver 62 may include an internal signal to wake up the main receiver. In response to the interrupt signal 64, the main transceiver 62 is then powered on so that it can receive the data. Low power consumption can be achieved because the main transceiver 62 can be completely powered off while the wake-up receiver 63 scans for paging signals.

FIG. 8 illustrates a comparison between short/long periodic discontinuous reception (DRX) and event-based reception, and more particularly event-based wake-up signal reception.

Reuse of all PRBs has a high probability of degrading cell capacity due to the allocation of the entire PRB for wake-up signals or other secondary signals to be transmitted. Similarly, the complexity and power consumption of secondary receivers such as wake-up receiver (WuRx) hardware (HW) can increase significantly with increasing bandwidth.

The wake-up signal is an independent additional signal that is added on top of the existing signal structure. According to one possible implementation, a subset of the existing signal is muted to give room for the new signal. Muting can be arranged so that all receiving devices know it. It is possible that only inactive devices know muting.

If all potential recipient devices are informed of muting, one in-band carrier can be pre-reserved for this purpose. For example, both the user equipment (UE) and the eNB may be informed that some resources are lacking. At this time, the eNB and the UE have a capacity due to the above resource reservation for this wake-up channel, or for multiple wake-up channels if multiple UEs use different wake-up channels. Their rate matching can be tuned to take into account gaps. In this way, the loss of data bits that would otherwise be replaced by the wake-up channel is avoided. This option may cause increased signaling since all UEs connected to the system need to know the location of the wake up channel(s). According to one possibility, the position of the wake-up signal is included in the system information (SI).

If only the inactive device knows muting, there may be some missing resources at the physical level, so the eNB or other access system controller may not be able to decode it by the receiving device. Less aggressive link adaptation may have to be used to compensate for the relatively poor performance at.

Secondary resources can include non-scheduled resources. Secondary signals may be defined as non-scheduled resources because the transmitter scheduler does not handle secondary signals at all. Non-scheduled resources may be included at least partially within the scheduled resources. For example, a physical resource block has already been allocated to at least one connected device, ie the resource has been scheduled for transmission, and the same physical resource and more specifically a sub-carrier of the physical resource block is inactive. Allocated to transmit the wake-up signal to the state device.

9 and 10 show a limited number in the main transceiver when the wake-up signal is present (FIG. 10) and otherwise the full wideband signal is used for periodic data (FIG. 9). Is a logical representation of how the sub-carriers of can be muted. In this logical representation, the transmitter is shown as consisting of two separate logical transmitters, but in the physical implementation the two transmitter functions are single, as indicated by the dashed lines. It is recognized that it can be constructed in the form of a physical transmitter of.

The main transmitter function has the functionality for allocating data and control channels in a standardized manner and muting specific subcarrier(s). The wake-up transmitter function generates a narrowband wake-up signal to inform the main transmitter when to mute the selected subcarrier(s).

The wake-up signal can be transmitted in a time-division multiplexed form such that the wake-up signal is transmitted only in a dedicated carrier within a selected transmission time interval (TTI). That is, the wake-up signal may be transmitted only when needed, eg, in response to a particular event.

The wake-up channel is realized, for example, by muting a predetermined sub-carrier, and the sub-carrier can be modulated only when the access point (AP) needs to send a wake-up signal. The advantage of this approach is that it can be easily implemented in the transmitter and can be of low cost in terms of throughput reduction.

A possible implementation consists in using the direct current (DC) subcarrier of the OFDM signal. When a secondary transceiver is used for the wake-up channel or the like, the DC subcarrier may be based on mixing with a slightly offset local oscillator (LO) frequency, and then the signal Will continue to be added to the main antenna(s) before transmission. When the wake-up receiver receives the signal, it can mix with the offset LO and thus demodulate the signal. This solution may require an additional transmitter and may also require a better DC filter in the main receiver as the wake up channel may be perceived as noise. On the one hand, the impact on throughput should be limited since the DC subcarriers are generally not used for data transmission. According to one possibility, the wake-up receiver contains a tunable narrowband filter, thus avoiding the mixing procedure.

According to one possibility, the secondary signal may be a periodic signal, for example a discontinuous reception (DRX) type signal intended to be received at a secondary receiver with different transmission periods.

Although the embodiments have been described in the context of LTE, the same principles apply for any other communication system in which scheduled resources are allocated for transmission, or just for further development in LTE. It is possible to apply. Similarly, any other signal for an inactive device that could benefit from unscheduled communication on the secondary channel could be provided instead of the wake-up signal. Instead of the carrier provided by the base station, at least one of the carriers may be provided by the mobile communication device. For example, this is a communication system with multiple mobile devices, eg in a special network or other mobile station, which may be provided with no fixed equipment, but which acts as a base station or relay station and/or can communicate directly with each other. May apply to the field of application provided. Thus, although some embodiments have been described above, by way of example, with reference to some illustrative architectures for wireless networks, technologies, and standards, the embodiments are illustrated and described herein. It can be applied to any suitable form of communication system other than the above.

Equipment and functionality for the required data processing of base station equipment, communication devices and any other suitable equipment may be provided using one or more data processors. The functionality at each end described herein may be provided by a separate processor or an integrated processor. The data processor can be of any type suitable for the local technical environment, including but not limited to general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs), application specific integrated circuits (ASICs). ), gate level circuits and multi-core processor architectures. Data processing can be distributed across multiple data processing modules. For example, at least one chip can be used to provide a data processor. Appropriate storage capacity may also be provided in the associated device. The one or more memories may be of any type suitable for the local technical environment, and any suitable data storage technology, such as semiconductor-based memory devices, magnetic memory devices and systems, optical memories. It may be implemented using devices and systems, fixed memory and removable memory.

In general, the various embodiments may be implemented in hardware or application specific circuits, software, logic or any combination thereof. While some aspects of the invention may be implemented in the form of hardware, other aspects may be implemented in the form of firmware or software that may be executed by a controller, microprocessor or other computing device, the present invention It is not limited to these. Although various aspects of the present invention may be illustrated and described as block diagrams, flow charts, or using some other pictorial representation, those blocks, apparatus, systems, techniques described herein. And methods may be implemented in the form of hardware, software, firmware, application specific circuits or logic, general purpose hardware or controllers or computing devices, or some combination thereof, as non-limiting examples. Is fully understandable. The software is stored on a physical medium such as a memory chip, or a memory block implemented inside a processor, a magnetic medium such as a hard disk or a floppy disk, and an optical medium such as a DVD and its data variant CD. Can be done.

The above description has provided a complete and informative description of the exemplary embodiments of the invention using exemplary, non-limiting examples. However, various modifications and adaptations may become apparent to those skilled in the art when read in conjunction with the accompanying drawings and appended claims. However, such and similar modifications of the teachings of the present invention are still within the spirit and scope of the invention as defined in the appended claims. Indeed, there are additional embodiments that include combinations of one or more of any of the other embodiments discussed above.

Claims (20)

Assigning secondary frequency resources to at least one device in an inactive mode, independently of the scheduling of frequency resources of the scheduled system;
In order to control the reception of signals on the scheduled frequency resource, the at least one device in the inactive mode, and transmitting the wake-up signal on the secondary frequency resources,
Sending information about the secondary frequency resource in a system information message or via dedicated signaling, the method comprising:
The wake-up signal is on a dedicated carrier of the secondary frequency resource,
Will be sent at the selected sending time interval,
The receiving function for receiving signals on the scheduled frequency resource in the inactive mode is inactive ,
A secondary reception function for receiving a signal on the secondary frequency resource is active,
The secondary reception function is configured to have lower power consumption than the reception function,
The scheduling frequency resource comprises a unit of at least one resource,
Wherein at least one unit of resource comprises a first frequency resource,
The wake-up signal, activates said at least one device in the inactive mode,
Method. When the receiving function is in inactive mode, the reception functions running configured wider bandwidth than said secondary receiving function to receive a signal on the secondary frequency resource, the wake-up signal The method of claim 1, including the step of controlling based on The method of claim 1, wherein the secondary frequency resource comprises a second frequency resource that is less than the first frequency resource in a unit of one resource. Receiving a wake-up signal on a secondary frequency resource independently of the scheduling of frequency resources of the scheduled system when at least one device is in an inactive mode;
Receiving information about the secondary frequency resource in a system information message or via dedicated signaling;
On the basis of the received wake-up signal, a method comprising the steps of controlling reception of signals on the scheduled frequency resources,
The wake-up signal is on a dedicated carrier of the secondary frequency resource,
Received at selected transmission time intervals,
Wherein the inactive mode, configured receive function to receive a signal on the scheduled frequency resources are inactive,
A secondary receiving function configured to receive a signal on the secondary frequency resource is active,
The secondary reception function has lower power consumption than the reception function,
The scheduling frequency resource comprises units of at least one resource,
Wherein at least one unit of resource comprises a first frequency resource,
Received the wake-up signal is to activate the at least one device in the inactive mode, the method. Operating on a wider bandwidth than the secondary receive function configured to receive a signal on the secondary frequency resource when the receive function is in an inactive mode based on the wake-up signal; The method of claim 4 including the step of controlling the receive function. The method of claim 4, wherein the secondary frequency resource comprises a second frequency resource that is less than the first frequency resource within a unit of one resource. An apparatus comprising at least one processor and at least one memory containing computer program code,
The at least one memory and the computer program code are in the device using the at least one processor,
Assigning secondary frequency resources to at least one device in an inactive mode, independent of scheduling of frequency resources of the scheduled system,
Wherein in order to control the reception of signals on the scheduled frequency resources, to send a wake-up signal to said at least one device in inactive mode on the secondary frequency resources,
Configured to transmit information about the secondary frequency resource in a system information message or via dedicated signaling ,
The wake-up signal is transmitted on a dedicated carrier of the secondary frequency resource at selected transmission time intervals,
In the inactive mode, a receiving function for receiving signals on scheduled frequency resources is configured to be inactive ,
A secondary receiving function for receiving signals on the secondary frequency resource is configured to be active,
The secondary reception function is configured to have lower power consumption than the reception function,
The scheduling frequency resource comprises units of at least one resource,
Wherein at least one unit of resource comprises a first frequency resource,
The wake-up signal activates the at least one device in an inactive mode,
apparatus. At least one memory and computer program code is provided to the device using the at least one processor based on the wake-up signal when the receiving function is in an inactive mode. 8. The apparatus of claim 7, configured to control the receive function operating at a wider bandwidth than the secondary receive function configured to receive a signal on the . 8. The apparatus of claim 7, wherein the secondary frequency resource comprises a second frequency resource that is less than the first frequency resource within a unit of one resource. At least one memory and computer program code configured to use the at least one processor to communicate information about the secondary frequency resources to at least one device in an inactive mode ;
8. Apparatus according to claim 7, wherein the information preferably comprises at least one of user equipment identification, paging information. The secondary frequency resource comprises at least one subcarrier of an orthogonal frequency division multiplexing system , or
The secondary frequency resource is at least partially contained within a scheduled frequency resource, or
The secondary frequency resource comprises a DC subcarrier of an orthogonal frequency division multiplexing system,
The device according to claim 7. 8. The apparatus of claim 7, wherein the wake-up signal on the secondary frequency resource comprises a signal to wake up a function for receiving scheduled resources. A network node comprising the device according to claim 7 . An apparatus comprising at least one processor and at least one memory containing computer program code,
The at least one memory and the computer program code, using the at least one processor, causes the device to at least:
Receive signals on the scheduled frequency resources of the scheduled system,
Allowing the device to receive a wake-up signal on a secondary frequency resource independently of the scheduled frequency resource of the scheduled system when the device is in an inactive mode ,
In a system information message or via dedicated signaling, to receive information about said secondary frequency resource,
Is configured to control the reception of signals on the scheduled frequency resources based on the signal,
The wake-up signal is on a dedicated carrier of the secondary frequency resource,
Received at selected transmission time intervals,
Wherein the inactive mode, configured receive function to receive a signal on the scheduled frequency resources are inactive,
A secondary receiving function configured to receive a signal on the secondary frequency resource is active,
The secondary reception function has lower power consumption than the reception function,
The scheduling frequency resource comprises units of at least one resource,
Wherein at least one unit of resource comprises a first frequency resource,
The received wake-up signal activates the device in an inactive mode,
apparatus. The at least one memory and the computer program code cause the secondary device to use the at least one processor when the receiving function is in an inactive mode based on the wake-up signal. 15. The apparatus of claim 14, configured to control the receive function, which operates on a wider bandwidth than the secondary receive function, configured to receive signals on frequency resources. 15. The apparatus of claim 14, wherein the secondary frequency resource comprises a second frequency resource that is less than the first frequency resource within a unit of one resource. The at least one memory and the computer program code are configured to communicate information about the secondary frequency resource with the at least one processor,
The information preferably includes at least one of user equipment identification, paging information,
The device according to claim 14. The secondary frequency resource comprises at least one subcarrier of an orthogonal frequency division multiplexing system, or
The secondary frequency resource is at least partially contained within a scheduled frequency resource, or
The secondary frequency resource comprises a DC subcarrier of an orthogonal frequency division multiplexing system,
The device according to claim 14. 15. The apparatus of claim 14, wherein the signal on the secondary frequency resource comprises a signal to wake up a function for receiving scheduled resources. 15. The device of claim 14, wherein the device comprises a user device.

Images