WO2018034602A1

WO2018034602A1 - Paging providing uplink resource allocation

Info

Publication number: WO2018034602A1
Application number: PCT/SE2016/050767
Authority: WO
Inventors: Jose Luis Pradas; Johan Rune; Andres Reial
Original assignee: Telefonaktiebolaget Lm Ericsson (Publ)
Priority date: 2016-08-17
Filing date: 2016-08-17
Publication date: 2018-02-22

Abstract

The present disclosure relates to mobile communications. More specifically, the proposed technique relates to methods for paging, wherein the paging is providing uplink resource allocation. The disclosure also relates to corresponding devices and to a computer program for executing the proposed methods. This object is achieved by a method, performed in a network node, for receiving data from a wireless device. The method comprises determining S1 that a wireless device is expected to transmit uplink data in response to the paging transmission and transmitting S4 the paging transmission, wherein the paging transmission comprises information defining how to transmit uplink data in response to the paging transmission.

Description

Paging providing uplink resource allocation TECHNICAL FIELD

The present disclosure relates to mobile communications. More specifically, the proposed technique relates to methods for paging, wherein the paging transmission is providing an uplink resource allocation. The disclosure also relates to corresponding devices and to a computer program for executing the proposed methods.

BACKGROUND

The 3rd Generation Partnership Project, 3GPP, is responsible for the standardization of the Universal Mobile Telecommunication System, UMTS, and Long Term Evolution, LTE. The 3GPP work on LTE is also referred to as Evolved Universal Terrestrial Access Network, E- UTRAN. LTE is a technology for realizing high-speed packet-based communication that can reach high data rates both in the downlink and in the uplink and is a next generation mobile communication system relative to UMTS. In order to support high data rates, LTE allows for a system bandwidth of 20 MHz, or up to 100 MHz when carrier aggregation is employed. LTE is also able to operate in different frequency bands and can operate in at least Frequency Division Duplex, FDD, and Time Division Duplex, TDD, modes.

In an UTRAN and an E-UTRAN, a User Equipment, UE, or a wireless device is wirelessly connected to a Radio Base Station, RBS, commonly referred to as a NodeB, NB, in UMTS, and as an evolved NodeB, eNodeB or eNB, in LTE. A Radio Base Station, RBS, or an access point is a general term for a radio network node capable of transmitting radio signals to a UE and receiving signals transmitted by a UE. In Wireless Local Area Network, WLAN, systems the wireless device is also denoted as a Station, STA.

Following LTE, the 5th generation mobile networks, 5G, is being developed. One task for 5G is to improve throughput and capacity compared to LTE. This is achieved by increasing the sample rate and bandwidth per carrier. 5G is also focusing on the use of higher carrier frequencies i.e. above 5-10 GHz.

One aspect of 5G is Machine Type Communication, MTC, where not only individuals but also all sorts of machines are connected in real time. The Machine Type Communication, MTC, system should in particular allow for radio resource management that allows the coexistence between different classes of applications, wherein the different classes generate different kinds of data traffic such as; sporadic data (e.g., alert messages, periodic data) and real-time data (or simply best-effort data). These different types of applications have different requirements on the 5G network.

In view of MTC, one requirement of the radio concepts to be used in 5G is to support low power devices. In a couple of years, a massive number of devices are expected to be connected through wireless networks generating the so called Internet of Things, loT. Many of these being simple sensor devices that typically transmit small amounts of data seldom. One parameter that is vital for the enablement and success of loT is power consumption. 10 years' longevity is a timeframe adopted by industry and which requires great resource frugality both in the communications modules as in the sensor or actuator modules of the device.

One further requirement on the radio concepts to be used in 5G, is to support highly reliable ultra-low delay Machine-Type Communication, MTC, i.e., Critical-MTC. The Critical-MTC concept should address the design trade-offs regarding e.g., end-to-end latency, transmission reliability, system capacity and deployment, and provide solutions for how to design a wireless network for different industrial-application use cases. The Critical MTC system should in particular allow for radio resource management that allows the coexistence between different classes of applications: sporadic data, e.g., alert messages, periodic data, and others with e.g. real-time data (or simply best-effort data).

In cellular communication systems such as LTE, paging messages are used to page UEs being in idle mode about mobile terminated calls. A paging message can also be used as a trigger for a UE to read system-information or to provide indication from a public warning system. In LTE, any data transmission succeeding the paging requires the UE to initiate a random access procedure which allows the UE to connect to the network and get an uplink resource or uplink grant to be able to transmit data. This requires the UE to move from Idle Mode to Connected Mode, which results in a relatively large amount of signalling being exchanged between the UE and the network. There are disadvantages in the context of small data packet transmissions caused by conventional uplink grant provision due to high signaling overhead and long delay. In some small data transmissions, the signaling overhead may be comparable to or larger than the data to transmit. It has been proposed to allow adaptation of the present paging mechanisms to support certain special scenarios. This adaptation consists e.g. of repetition of paging messages for the purpose of coverage extension for low complexity/cost MTC devices or robustness improvement for UEs with extra-long DRX cycles.

However, considering the diversity in terms of supported services, wireless device types, as well as deployments and use cases for 5G networks, further mechanisms aiming at defining communications mechanisms that enable optimizing network performance, despite the different requirements of the different types of applications and devices are also desirable.

SUMMARY

An object of the present disclosure is to provide methods, devices configured to execute methods, and computer programs which seek to mitigate, alleviate, or eliminate one or more of the above-identified deficiencies in the art and disadvantages either separately or in any combination.

This object is achieved by a method, performed in a network node, for receiving data from a wireless device. The method comprises determining that a wireless device is expected to transmit uplink data in response to the paging transmission and transmitting the paging transmission, wherein the paging transmission comprises information defining how to transmit uplink data in response to the paging transmission. Thereby latency caused by connection establishment can be reduced. For example, signaling may be reduced by limiting the number of signaling messages that the wireless device and the network need to exchange to be able to send a small amount of data.

According to some aspects, the uplink data that the wireless device is supposed to transmit is control plane data or user plane data. Thereby latency may be reduced by introducing a feedback mechanism for the paging message (when it contains data). According to some aspects, the information defines uplink resources to be used by the wireless device when responding to the paging or an uplink grant. Hence, latency may be reduced by allocating an uplink resource (grant) to the wireless device already in the paging message when this paging message will trigger the UE to access the network According to some aspects, the method comprises receiving uplink data in response to the paging transmission. Then the uplink data is received in accordance with the information. Thus, the response can be received in a more efficient manner as it is transmitted in a way controlled by the network node.

According to some aspects, the determining comprises determining that an acknowledgement is supposed to be received from the wireless device in response to the paging or that the paging transmission comprises non-paging related data requiring a response. Hence, the methods may be implemented in situations where the signaling overhead is significant.

According to some aspects, the paging transmission comprises non-paging related data and wherein the information defines how to respond to or acknowledge the non-paging related data. This particular aspect of the disclosure provides a way to provide a small amount of data with small signaling overhead.

According to some aspects, the disclosure relates to a method, performed in a wireless device, for transmitting uplink data to a network node. The method comprises receiving a paging transmission, wherein the paging transmission comprises information defining how to transmit data in response to the paging transmission, and transmitting uplink data in response to the paging transmission; wherein the uplink data is transmitted in accordance with the information. The information enables the wireless device to respond to the paging in a more efficient manner. According to some aspects, the transmitting comprises keeping or clearing a stored uplink configuration. In certain scenarios, when the wireless device has not moved and wherein the channel has not changed, it might be beneficial to reuse a previous uplink configuration. Then data might be transmitted without new connection establishment. According to some aspects, the transmitting com prises responding to or acknowledging non-paging related data comprised in the paging tra nsmission.

According to some aspects, the information defines uplink resources to be used by the wireless device when responding to the paging or an uplink grant. Thereby, the full connection establishment that is normally needed to transmit uplink data is avoided.

According to some aspects, the disclosure relates to a computer program comprising computer program code which, when executed, causes a wireless device or network node to execute the methods described a bove and below. According to some aspects the disclosure pertains to a computer program product or a computer readable medium holding said computer program.

BRI EF DESCRI PTION OF TH E DRAWI NGS

The foregoing will be apparent from the following more particular description of the example embodiments, as illustrated in the accompanying drawings in which like reference characters refer to the same parts throughout the different views. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the example embodiments.

Figure 1 depicts paging and connection establishment procedure according to legacy LTE;

Figure 2 depicts a system comprising a wireless device and a network node;

Figure 3a and 3b depict paging and connection establishment procedure according to some aspects of the disclosure;

Figure 4 illustrates different paging transmission formats;

Figure 5 is a flowchart illustrating method steps performed in a network node according to the proposed technique;

Figures 6a and 6b are flowcharts illustrating method steps performed in a wireless device according to the proposed technique;

Figure 7a is an example node configuration of a network node, according to some of the example embodiments;

Figure 7b is an example node configuration of a network node comprising modules;

Figure 8a is an example node configuration of a wireless device, according to some of the example embodiments; and Figure 8b is an example node configuration of a wireless device comprising modules. DETAILED DESCRIPTION

Aspects of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings. The apparatus and method disclosed herein can, however, be realized in many different forms and should not be construed as being limited to the aspects set forth herein. Like numbers in the drawings refer to like elements throughout.

The terminology used herein is for the purpose of describing particular aspects of the disclosure only, and is not intended to limit the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Traditionally, any data transmission to a wireless device requires the wireless device to move from Idle Mode to Connected Mode. This results in a relatively large amount of signaling data being exchanged between the wireless device and the network. This signaling load may be justified when there is a fair amount of user-data waiting to be delivered to the wireless device. However, the signaling load may be excessive when the amount of user data to be transmitted to the wireless device is limited and could be transmitted in a few resource blocks.

The traditional purpose of paging is to inform a wireless device in idle mode about incoming data or about the presence of other new information, such as system information or emergency information that the wireless device needs to read. For better understanding of the proposed technique the paging procedure in LTE will now be briefly discussed.

The purpose of paging in LTE is to transmit data to a UE in RRCJDLE state and/or; to inform wireless devices in RRCJDLE state and wireless devices in RRC_CONNECTED state about a system information change and/or; to inform about an ETWS primary notification and/or ETWS secondary notification and/or to inform about a CMAS notification.

The paging message in LTE includes a paging record - which comprises one or more wireless device identities and the Core Network domain, and different indications e.g. system information modification, Earthquake and Tsunami Warning System, ETWS, indication, Compatible Commercial Mobile Alert System, CMAS, indication, and Extended Access Barring, EAB, parameters modification indication.

When the network sends a paging message to the wireless device, the network associates the downlink scheduling assignment on the Physical Downlink Control Channel, PDCCH, to the Paging Radio Network Temporary Identifier, P-RNTI. All wireless devices which decode the P-RNTI will acquire the paging message which is transmitted on the Physical Shared Control Channel, PDSCH, in the indicated resources in the same time slot. The downlink scheduling assignment on the PDCCH indicates the resource blocks allocated on the PDSCH for the physical channel where the paging message is contained.

If end-user plane data is waiting in the network to be transmitted to a wireless device, the paging message will include a paging record with the identity of the wireless device for which data is waiting, and the wireless device will start the random access procedure to get a Radio Resource Control, RRC, connection. When the wireless device is in RRC_CONNECTED state, the network can transmit the user plane data on the downlink-Shared Channel, SCH/PDSCH.

If the paging message indicates a system information change, ETWS/CMAS flags, or EAB flags, the wireless device needs to read the system information and acquire the new/updated information according to how it is specified. In the case of warning messages, the system information block carrying such information may contain several hundreds of bits to deliver the message to all the wireless devices in a certain area.

After a UE has received a paging message, the UE may access the network. Typically the UE initiates the random access procedure which allows the UE to connect to the network and get an uplink resource or uplink grant to be able to transmit data. Paging and connection establishment procedure according to LTE is illustrated in Figure 1. In order to establish a RRC connection the UE needs to perform a Random Access Procedure, which involves a RRC Connection Request and a RRC Connection Setup. The message identifies the signaling radio bearer 1, SRB1. After a completed Random Access procedure, the UE acknowledges the setup of SRB1, by the RRC Connection Complete.

The Security Mode Command message is used to command the UE for the activation of AS security. RRC connection reestablishment complete confirms the security mode. The E- UTRAN always initiates security mode prior to the establishment of Signaling Radio Bearer2, SRB2 (used for information transfer) and Data Radio Bearers, DRBs. Hence, in LTE systems the signaling of Figure 1 first needs to be executed, before data can be transmitted. This signaling causes delay, which might be significant in connection with transmission of small amounts of data.

In addition to paging, "tracking" is another feature needed in any network, when it has data to be transmitted to a wireless device. "Tracking" is a functionality which supports locating the wireless device that is about to receive data.

In LTE, the network is broken down into so called Tracking Areas for this purpose. In LTE, the network configures a UE in idle mode with one or more tracking areas. This allows the network to locate the UE within a certain defined region. When the UE enters a tracking area which is not in the list provided by the network, the UE performs a tracking area update. This update assists the network to update the UE location information, which enables the network to contact the UE through paging when needed.

There have been discussions within the development of 5G to complement the LTE idle mode by a so-called "dormant" mode, in which the UE is connected from the core network's point of view, i.e. the SI connection remains established, while the radio access network keeps track of the UE's movements within a limited area. This tracking that the Radio Access Network, RAN, performs will assumedly be supported by similar mechanisms as the tracking in idle mode in LTE, but without involving the core network. Hence, an area concept is defined, denoted Tracking RAN Area, TRA, and a signal for indication of the TRA has been defined, denoted Tracking RAN Area Signal, TRAS. However, for the "dormant" state described above to be successful, it will need to be designed so that low latency requirements are met, as well as that the signaling overhead is low. This disclosure therefore proposes that the network may include in the paging message an uplink resource allocation or uplink grant for the UE. Stated differently, the paging is extended below its traditional purpose "to page" to also include other information, namely information defining how to react to the "page".

An example scenario where the proposed disclosure can be utilized is illustrated in Figure 2, which shows a wireless communication system, i.e., a cellular radio system 5, comprising a network node 20 and a wireless device 10. The network node 20 can be an access node or a base station (cf. eNodeB in LTE) or any similar device/s configured to achieve the same functionalities. Moreover, the wireless communication system is equipped with a paging mechanism wherein according to some embodiments small amounts of downlink data, i.e. user data, can be attached to the paging message, which will be further explained below.

In the example scenario, the network node 20 is informed that it needs to deliver a short downlink data package (e.g. user data) to a wireless device 10 which is in an energy saving state, i.e. a state in which the wireless device periodically monitors a set of downlink channels without having established an active link connection ("dormant" mode). Hence, a paging message with the enclosed user data is to be transmitted in a tracking RAN area 51. It is assumed that the location of the wireless device is known to the network node in terms of the tracking RAN area/s (or tracking area, or similar area) associated with the wireless device. It is also assumed that the network node 20 knows that the wireless device 10 will respond to the paging with an uplink transmission to the network node 20.

This disclosure proposes that when the network expects the wireless device to access the network and transmit data (it could be user plane or control plane data) after the network sends a paging message to the wireless device; the network could include in the paging message an "uplink resource allocation". The "uplink resource allocation" could indicate one or more configuration parameters for the uplink resource allocation, as will be described in more detail below. This implies either an uplink grant or information defining e.g. resources to be used by a RACH. Figure 3a illustrates a network node 20 paging a wireless device 10 according to one example embodiment. In this example the paging comprises paging response parameters. The wireless device then responds to the paging using the paging response parameters. The paging response parameters could comprise different kinds of information that is usable when responding to the paging as will be further explained below. In some scenarios no RACH procedure is needed. According to some aspects the RACH procedure is needed, but the connection setup is facilitated.

The proposed concept is particularly interesting when the amount of data to be transmitted is expected to be low in comparison with the amount of signaling required by a traditiona l RACH procedure, which is the case in the following scenarios.

One possibility is as mentioned above to let the paging message also include small amounts of data. Hence, in one scenario a small data package is included in the paging transmission in the downlink and the wireless device needs to reply with a small data package in the uplink. This will be described in more detail in connection with Figure 4. Hence, the proposed technique could be beneficial when the paging comprises non-paging related data that the wireless device should acknowledge. Figure 3b illustrates a network node 20 paging a wireless device 10, wherein data is included in the paging transmission, which should be seen as one particular aspects of this disclosure. In this example the paging comprises data and an "uplink grant" defining resources that the wireless device 20 may use for responding to the paging. The wireless device then acknowledges the data using the granted uplink resources. Hence, the wireless device does not need to initiate a RACH procedure or a RRC connection setup in order to receive and acknowledge a small amount of data. How this is possible will be further described below.

In another situation, where the proposed method may be implemented, no explicit data is included in the paging transmission in the downlink, but the paging message carries an indication that the wireless device shall transmit a small uplink data package, e.g. sensor data, for example according to a previous configuration.

In a third scenario, no explicit data is included in the paging message, but the wireless device is known to transmit only a small amount of uplink data, e.g. a single small data packet, in response to paging. This may be known from subscription data, device type/category of the wireless device, signaled capabilities of the wireless device or prior experience of the wireless device's behavior in response to paging, i.e. recorded statistics.

The network may transmit a paging message to the wireless device when there is user or control plane data to be transmitted to the wireless device. As an option, the network may choose to transmit this data bundled with the paging message itself. Alternatively, the network may choose to send a paging indication to the wireless device to force the wireless device to establish a connection with the network, and then send the user plane data in a conventional manner. The exact format of a paging message conveying user or control plane data is decided by the network.

In LTE Release 12, a paging transmission comprises one paging message, transmitted on the so called Paging Channel, PCH. However, for the purpose of future communication systems different formats have been proposed in a non-published internal reference implementation. Figure 4 illustrates some example paging formats according to this reference implementation.

The non-published internal reference implementation proposes to use a specific channel Paging Indication Channel (here denoted PICH) for the "paging indication" and a specific "paging channel" (here denoted PMCH) for further "paging messages" that may optionally comprise other data such as control plane data or user plane data. When a paging message is present, the paging message may carry a continuation of the paging indication such as one or more paging targets and paging data. The paging data can comprise an instruction to the wireless device, system information or emergency info to the wireless device, user data, etc. Hence, the paging transmission according to some aspects comprises a full or a partial list of targeted wireless devices. Thus, one possibility is to let the paging indication include, not only the paging record, but also other data such as control plane data or user plane data, as shown in format Fl of Figure 4. Another possibility is to let a paging transmission comprise several linked paging messages, as shown in format F2 of Figure 4.

The paging transmission formats might be adapted for optimal paging message transmission in different scenarios. Depending on the paging transmission format, the paging transmission may comprise one, two or several parts. Typically the paging transmission comprises a first part being a paging indication that indicates whether paging is in progress and that also potentially provides partial or full paging information for the concerned wireless devices. The paging indication may carry one or more of the following contents; a paging flag; a paging target: a target wireless device list; paging message; a pointer to one or more paging messages.

User plane transmissions in the downlink are typically followed by user plane transmissions in the uplink (and the same is valid for control plane communication), for example, RLC ACK/NACK, or higher layer protocol information. In LTE the wireless device is required to request an uplink resource allocation (grant) to be able to transmit the uplink data.

Some particular aspects of the disclosure relate to above mentioned paging messages that comprise data. According to this particular aspect the method comprises reporting successful reception of the downlink data received by the paging message. More specifically it is proposed that the successful reception of data included in a paging transmission is reported in a control message. The reporting could be implemented on different layers, and could thus comprise at least one of Medium Access Protocol, MAC, Radio Link Control, RLC, and Packet Data Convergence Protocol, PDCP, entities.

This aspect may be implemented independently of the concept described above in connection with Figure 5. However, applied together with the information about uplink resources, the performance is expected to be better. Then, the grant indicated in the paging message could be utilized to transmit the reports/feedback of the downlink data included in the paging message. Feedback could e.g. be ACK/NACK of downlink data conveyed in the paging message or Channel Quality Information, CQI. The grant configuration could also be used to transmit e.g. a Tracking Area Update Request message.

In general, the grant configuration could be used to transmit any type of uplink data as long as the grant configuration is valid for the specific data/bearers/application/services. The proposed techniques are based on the insight that the traditional RACH procedure is time and resource consuming when only small amounts of data are transmitted. Hence, this disclosure proposes a more flexible paging mechanism to serve the broad spectrum of scenarios and devices to be supported by 5G systems.

The proposed methods will now be described in more detail referring to Figures 5 and 6a. It should be appreciated that Figures 5 and 6a comprise some operations and modules which are illustrated with a solid border and some operations and modules which are illustrated with a dashed border. The operations and modules which are illustrated with solid border are operations which are comprised in the broadest example embodiment. The operations and modules which are illustrated with dashed border are example embodiments which may be comprised in, or a part of, or are further embodiments which may be taken in addition to the operations and modules of the broader example embodiments. It should be appreciated that the operations do not need to be performed in order. Furthermore, it should be appreciated that not all of the operations need to be performed. The example operations may be performed in any order and in any combination.

Example operations in a network node Figure 5 illustrates a method, performed in a network node, for receiving data from a wireless device. The method is performed at any time, for example in the network nodes in Figures 3a or 3b, when the network node has information that it wants to provide to a wireless device.

The method comprises determining, SI, that a wireless device is expected to transmit uplink data in response to the paging transmission. For example, the network node detects that a paging transmission effectively signals that the wireless device shall transmit uplink data in response to the paging transmission. According to some aspects, the uplink data that the wireless device is supposed to transmit is control plane data or user plane data.

In accordance with the proposed technique, information defining how to transmit uplink data in response to the paging transmission is included in the paging message when the network expects the wireless device to transmit uplink data as a result of the paging message. Hence, the network node needs to identify such scenarios.

Some example scenarios where it can be expected that the wireless device will transmit uplink data as a result of the paging message will now be described.

One example is as discussed above when downlink data is conveyed with, e.g. bundled with, the paging message and the wireless device is expected to respond to it. According to some aspects, the paging transmission comprises non-paging related data, i.e. information not generally included in the paging record. The non-paging related data could be user plane data or control plane data as discussed above. Then the information defines how to respond to the non-paging related data.

Another example is when data is conveyed with, e.g. bundled with, the paging message and the wireless device is expected to provide feedback on the successfulness of the reception of the data, e.g. in the form of RLC (or higher layer protocol) ACK/NACK. Stated differently, according to some aspects, the determining SI comprises determining that an acknowledgement is supposed to be received from the wireless device in response to the paging or that the paging transmission comprises non-paging related data requiring an acknowledgement. An acknowledgement can herein refer to both a positive or negative acknowledgement.

A third example is when the paging transmission includes (or is accompanied by) a request to the wireless device to provide channel quality information, CQI, to the network.

Another scenario is when the wireless device is known to transmit a small amount of data in response to paging. This may be known e.g. based on subscription data, based on wireless device capability information previously signaled by the wireless device, or based on recorded statistics.

A further scenario is when the paging transmission includes (or is accompanied by) an indication to the wireless device to transmit a certain, e.g. pre-agreed, data or type of data. This mechanism could be based on an agreement between the operator and the subscriber/device owner, e.g. for certain Machine Type Communication, MTC, devices, such as sensor devices. The agreement could be indicated in the subscription data associated with the wireless device. In the example MTC device scenario, the application running in the wireless device could have a pre-agreement with an application server in the network (i.e. the MTC device could e.g. be configured accordingly by the application server). I n addition to the above, or combined with the above, the network may base its choice of whether to include information defining how to transmit uplink data in response to the paging transmission on knowledge of urgency, e.g. when it is known that the wireless device has delay sensitive data to transmit in the uplink, either in response to downlink data delivered with the paging message or triggered by an indication in the paging message (e.g. the above described MTC device scenario). The network may know this e.g. based on subscription data, based on wireless device capability information previously signaled by the wireless device, or based on recorded statistics.

I n some scena rios, the network already in connection with the paging allocates resources to be used by the wireless device when responding to the paging transmission. I n other words, according to some aspects, the proposed method also comprises the step of allocating S2 uplink resources to be used by the wireless device when responding to the paging transmission.

The method further comprises transmitting S4 the paging transmission, wherein the paging transmission comprises information defining how to transmit uplink data in response to the paging transmission. Stated differently, the paging transmission is configured such that it includes information that the wireless device can use when responding to the paging. The information typically enables the wireless device to respond in a faster and/or more resource efficient way. According to some aspects, this involves constructing S3 a paging transmission such that it comprises information defining how to transmit uplink data in response to the paging transmission.

According to some aspects, the information defines uplink resources to be used by the wireless device when responding to the paging or an uplink grant. I n other words, information about the allocated resources is sent to the wireless device. Stated differently, when the network expects the wireless device to access the network and transmit data (it could be user plane or control plane data) after the network sends a paging message to the wireless device, the network could include in the paging message an "uplink resource allocation".

The information defining how to transmit uplink data in response to the paging transmission, above referred to as the "uplink resource allocation", could indicate one or more configuration parameters for the uplink resource allocation. One example of such a parameter is the type of access e.g. contention-based access, "listen-before-talk", or conventional uplink data channel. Another example of information defining how to transmit uplink data in response to the paging transmission is the amount of data the wireless device can send e.g. number of uplink resource blocks and/or transport block size, indication of resource blocks in the time- frequency domain, the modulation and coding scheme, MCS, to use.

Other parameters are the type of data which may use the grant e.g. specific radio bearers/services/application and the validity of the grant e.g. when, point in time, the grant is valid, period of time during which the wireless device can use the grant. In general, the information could be used to transmit any type of uplink data as long as the grant configuration is valid for the specific data/bearers/application/services.

The information might also define the type of uplink data the grant is intended for, e.g. indicated as 'ACK/NACK', 'CQI' or 'any data'. Such a configuration parameter could also be conveyed outside the actual uplink grant, but still be included in the same paging message.

Another parameter that might be included is the timing advance to be used by the wireless device when using the uplink grant for transmission (further described below).

Yet another parameter that might be included is guard time to be used by the wireless device when using the uplink grant for transmission, as will be further described below.

Hence, according to some aspects the information comprises at least one of; the type of access for the uplink response, the amount of data to be transmitted with the uplink, the type of data which may use an uplink grant comprised in the information, the validity of an uplink grant, the type of data an uplink grant is intended for, timing advance to be used by a wireless device when using an uplink grant, a guard time to be used by the wireless device when using an uplink grant.

The method further comprises receiving S5 uplink data in response to the paging transmission; wherein the uplink data is received in accordance with the information. Hence, after the paging the network node prepares for receiving data in accordance with the information provided in the paging. By providing such information in the paging the uplink transmission can be performed in an efficient manner.

Example operations in a wireless device A corresponding method, performed in a wireless device, for transmitting uplink data to a network node, will now be described referring to Figure 6a. Hence, the method is performed in a wireless device that receives a paging described in relation to Figure 5.

A wireless device in idle or dormant mode monitors S10 a paging channel for a paging transmission. Then a paging targeting the wireless device is detected. The proposed method comprises receiving Sll a paging transmission, wherein the paging transmission comprises information defining how to transmit data in response to the paging transmission. The information is for example an "uplink resource allocation" or an uplink grant for the wireless device. The information could also comprise other control parameters usable when responding to the paging. The information could be any of the parameters described above.

According to some aspects, the wireless device identifies S12, in the received paging transmission, information defining how to transmit uplink data in response to the paging transmission. The wireless device then uses this information for the uplink transmission.

The method further comprises transmitting S13 uplink data in response to the paging transmission; wherein the uplink data is transmitted in accordance with the information. In other words, the wireless device uses the information comprised in the paging when it responds to the paging. The information defines how to access the channel for uplink access.

For example the information defines specific bearers to be used for RACH or for data. The information might also define if a contention based or contention free Random Access shall be used. According to some aspects, the information might define a conventional uplink data channel that the wireless device should use when responding to the paging. In practice, the information could define any control information about the uplink.

According to some aspects, the transmitting S13 comprises keeping or clearing a sto uplink configuration. Hence, the uplink might already be configured since the last transmission. In some scenarios, the wireless device might just keep using the same configuration.

According to some aspects, the transmitting S13 comprises responding to or acknowledging non-paging related data comprised in the paging transmission, as discussed above.

According to some aspects, the information defines uplink resources to be used by the wireless device when responding to the paging or an uplink grant. The information might e.g. specify time, frequency, TX power, response mode or code domain to be used when responding. Uplink data channel access without Timing Advanced signaling

One of the options for the uplink provisioning according to the invention is to configure data transmission via a conventional uplink data channel - a transmission approach that usually includes timing advance, TA, application by the wireless device to exactly align with symbol timing at the receiving network node. The benefit of including information defining how to transmit uplink data in response to the paging transmission in the paging transmissions is that the full connection establishment (e.g. RACH in LTE) is avoided. However, a consequence of avoiding the full connection establishment is that while the wireless device can establish downlink timing from the paging message, and possibly any associated downlink synchronization signals, no timing configuration defining the timing advance is provided.

However, the uplink data channel access may when no timing configuration is available be realized e.g. by one of the following ways:

• If the network deployment consists of small cells or access node coverage areas, e.g. if the inter-site distance, ISD, is small compared to the cyclic prefix, CP, length, the wireless device may set the timing advance to zero. The wireless device may detect the small-ISD deployment e.g. if the provided timing advance value is consistently zero, or very small.

• If the wireless device is static, i.e. not moving around in the network coverage area, the wireless device may apply the same timing advance as obtained in the most recent established connection. The wireless device may detect low mobility by observing e.g. substantially constant timing advance over time or substantially constant propagation channel parameter or channel response estimates.

The network may thus choose to apply embodiments of the invention transparently in some types of deployment and not in other types. It may similarly choose to apply embodiments of the invention to some wireless devices and not to others.

To be able to apply the proposed methods to uplink data channel access to any wireless devices and deployments, a certain guard time may be used by the wireless device to prevent drifting into the subsequent timeslot. The guard time could be part of the information provided in the paging message or it could be part of the system information.

Acknowledgement of reception of downlink data bundled with paging

One aspect of the disclosure, which is related to the methods described above, is acknowledgement feedback for user plane data transmitted in a paging message in accordance with the non-published internal reference implementation mentioned above. The reason is that paging transmissions do not have any HARQ retransmissions at the MAC layer. Therefore, once the message is sent, it is up to higher layers to recover any missing data.

Therefore this disclosure proposes to introduce a mechanism at lower layers e.g. MAC, RLC, PDCP, which allows to send a feedback acknowledgement (ACK or NACK) for user plane data sent on the paging message.

This aspect of the disclosure is illustrated in Figure 6b.

As above, the method comprises monitoring S10 a paging channel and receiving Sll' a paging transmission. According to this aspect, the paging transmission comprises non-paging related data. According to this aspect, the wireless device then transmits S13' an acknowledgement of the non-paging related data response to the paging transmission. The acknowledgement could be reporting to one or more of the following MAC/RLC/PDCP entities. In this way an efficient method of transmitting small amounts of data with little signaling overhead is provided.

According to some aspects the wireless device first identifies S12' that the paging transmission comprises user plane data that needs to be acknowledged. Then, the acknowledgement S13' is transmitted in response to the identifying.

If the wireless device transmits a negative acknowledgement, the wireless device could either access the network so that the network can retransmit the data using regular data transmission channels or alternatively the network sends a new paging message containing the retransmitted data. Which method to use could be standardized or dynamically configured via the system information or an indication in the paging message.

Hence, this aspect is related to, but independent from, the methods described above in relation to figure 6a. However, if they are applied together, their performance is expected to be better. Hence, if the network indicated an uplink resource in the paging message, the wireless device could use this grant to transmit this acknowledgement.

For example, the grant indicated in the paging message could be utilized to transmit the reports/feedback. Feedback could e.g. be ACK/NACK of downlink data conveyed in the paging message or channel quality information, CQI. Alternatively, this grant configuration could also be used to transmit e.g. a Tracking Area Update Request message. This aspect also relates to a corresponding method in a network node 20 comprising receiving the acknowledgement of the non-paging related data in response to the paging transmission and to a corresponding wireless device 10 and network node 20, see below.

Connection and state handling after paging

As previously described, the uplink grant may be included in the paging message when the wireless device is expected to transmit uplink data as a result of the paging, e.g. in response to downlink data delivered with the paging message or triggered by an indication in the paging message. This is particularly advantageous if the wireless device is expected to transmit only a small amount of data or if the data the wireless device is expected to transmit is urgent, i.e. delay sensitive.

After the transmission of uplink data using the transmission resources indicated by the uplink grant included in the paging message the wireless device can either go back to an energy-saving state, e.g. Dormant state, or proceed with regular connection establishment, or remain in an active state but rely on contention based uplink transmission for further data transmissions.

To this end, there may be an agreement between the network and the wireless device, e.g. based on an indication in the paging message, prior configuration through dedicated or broadcast configuration messages or subscription, how the wireless device should act and be treated. For instance, if the wireless device, when utilizing the uplink grant for transmission, indicates that it has no more data to send (e.g. in the form of a buffer status report on the MAC layer), the wireless device goes back to the energy-saving state, e.g. Dormant state. Otherwise, the wireless device and the network could proceed with the connection establishment procedure to establish a regular, full-fledged connection. Example implementations in a network mode

Turning now to Figure 7a, which is a schematic diagram that illustrates some modules of an example embodiment of a network node being configured for receiving data from a wireless device in response to paging. The network node 20 is typically a radio network node or base station, such as an eNodeB in LTE, providing wireless access to wireless devices within one or more areas referred to as cells. The network node is configured to implement the methods described in relation to Figure 5.

The network node 20 comprises a radio communication interface (i/f) 21 configured for communication with wireless devices 10. According to some aspects the radio communication interface 21 is also arranged for wireless communication with other network nodes within range of the network node 20. The radio communication interface 21 may be adapted to communicate over one or several radio access technologies. If several technologies are supported, the node typically comprises several communication interfaces, e.g. one WLAN or Bluetooth communication interface and one cellular communication interface. As shown in Figure 7a, the network node 20 according to some aspects comprises a network communication interface 24. The network communication interface 24 is configured for communication with other network nodes e.g. in a core network. This communication is often wired e.g. using fiber. However, it may as well be wireless. The network node 20 comprises a controller, CTL, or a processing circuitry 22 that may be constituted by any suitable Central Processing Unit, CPU, microcontroller, Digital Signal Processor, DSP, etc. capable of executing computer program code. The computer program may be stored in a memory, MEM 23. The memory 23 can be any combination of a Read And write Memory, RAM, and a Read Only Memory, ROM. The memory 23 may also comprise persistent storage, which, for example, can be any single one or combination of magnetic memory, optical memory, or solid state memory or even remotely mounted memory. According to some aspects, the disclosure relates to a computer program comprising computer program code which, when executed, causes a network node to execute the methods described above and below. According to some aspects the disclosure pertains to a computer program product or a computer readable medium holding said computer program.

The processing circuitry 22 is configured to cause the network node 20 to determine that the wireless device is expected to transmit uplink data in response to the paging transmission and to transmit the paging transmission, wherein the paging transmission comprises information defining how to transmit uplink data in response to the paging transmission.

According to some aspects, the uplink data that the wireless device is supposed to transmit is control plane data or user plane data.

According to some aspects, the processing circuitry 22 is configured to cause the network node 20 to allocate uplink resources to be used by the wireless device when responding to the paging transmission.

According to some aspects, the information defines uplink resources to be used by the wireless device when responding to the paging or an uplink grant. According to some aspects, the processing circuitry 22 is configured to cause the network node 20 to receive uplink data in response to the paging transmission; wherein the uplink data is received in accordance with the information.

According to some aspects, the processing circuitry 22 is configured to cause the network node 20 to determine that an acknowledgement is supposed to be received from the wireless device in response to the paging or that the paging transmission comprises non- paging related data requiring a response.

According to some aspects the processing circuitry 22 or the network node 20 comprises modules configured to perform the methods described above. The modules are illustrated in Figure 7b. The modules are implemented in hardware or in software or in a combination thereof. The modules are according to one aspect implemented as a computer program stored in a memory 13 which run on the processing circuitry 12.

According to some aspects the network node 20 or the processing circuitry 22 comprises a determiner 221 configured to determine that the wireless device is expected to transmit uplink data in response to the paging transmission.

According to some aspects the network node 20 or the processing circuitry 22 comprises an allocator 222 configured to allocate uplink resources to be used by the wireless device when responding to the paging transmission

According to some aspects the network node 20 or the processing circuitry 22 comprises a configurer 223 configured to configure a paging transmission such that it comprises information defining how to transmit uplink data in response to the paging transmission

According to some aspects the network node 20 or the processing circuitry 22 comprises a transmit module 224 configured to transmit the paging transmission, wherein the paging transmission comprises information defining how to transmit uplink data in response to the paging transmission.

According to some aspects the network node 20 or the processing circuitry 22 comprises a second receiver module 225 configured to receive uplink data in response to the paging transmission in accordance with the paging response parameters Example implementation in a wireless device

Figure 8a illustrates an example of a wireless device 10, which incorporates some of the example embodiments discussed above. Figure 8a discloses a wireless device being configured for transmitting uplink data to a network node 20 in response to paging. The wireless device 10 is configured to implement the methods described in relation to Figure 6a and/or 6b.

A "wireless device" as the term may be used herein, is to be broadly interpreted to include a radiotelephone having ability for Internet/intranet access, web browser, organizer, calendar, a camera (e.g., video and/or still image camera), a sound recorder (e.g., a microphone), and/or Global Positioning System, GPS, receiver; a Personal Communications System, PCS, user equipment that according to some aspects combine a cellular radiotelephone with data processing; a Personal Digital Assistant, PDA, that can include a radiotelephone or wireless communication system; a laptop; a camera (e.g., video and/or still image camera) having communication ability; and any other computation or communication device capable of transceiving, such as a personal computer, a home entertainment system, a television, etc.

As shown in Figure 8a, the wireless device 10 comprises a radio communication interface or radio circuitry 11 configured to receive and transmit any form of communications or control signals within a network. It should be appreciated that the radio circuitry 11 is according to some aspects comprised as any number of transceiving, receiving, and/or transmitting units or circuitry. It should further be appreciated that the radio circuitry 11 can e.g. be in the form of any input/output communications port known in the art. The radio circuitry 11 e.g. comprises RF circuitry and baseband processing circuitry (not shown).

The wireless device 10 according to some aspects further comprises at least one memory unit or circuitry 13 that is in communication with the radio circuitry 11. The memory 13 can e.g. be configured to store received or transmitted data and/or executable program instructions. The memory 13 is e.g. configured to store any form of contextual data. The memory 13 can e.g. be any suitable type of computer readable memory and can e.g. be of volatile and/or non-volatile type

The wireless device 10 further comprises processing circuitry 12 which configured to cause the wireless device to receive a paging transmission, wherein the paging transmission comprises information defining how to transmit data in response to the paging transmission, and to transmit uplink data in response to the paging transmission; wherein the uplink data is transmitted in accordance with the information. The processing circuitry 12 is e.g. any suitable type of computation unit, e.g. a microprocessor, Digital Signal Processor, DSP, Field Programmable Gate Array, FPGA, or Application Specific Integrated Circuit, ASIC, or any other form of circuitry. It should be appreciated that the processing circuitry need not be provided as a single unit but is according to some aspects provided as any number of units or circuitry. The controller, CTL, or processing circuitry 12 is e.g. constituted by any suitable type of computation unit, e.g. a microprocessor, Central Processing Unit, CPU, microcontroller, Digital Signal Processor, DSP, Field Programmable Gate Array, FPGA, or Application Specific Integrated Circuit, ASIC, or any other form of circuitry capable of executing computer program code. The computer program is e.g. stored in a memory, MEM, 13. The memory 13 can be any combination of a Read And write Memory, RAM, and a Read Only Memory, ROM. The memory 13 in some situations also comprise persistent storage, which, for example, can be any single one or combination of magnetic memory, optical memory, or solid state memory or even remotely mounted memory. It should be appreciated that the processing circuitry need not be provided as a single unit but is according to some aspects provided as any number of units or circuitry. According to some aspects, the disclosure relates to a computer program comprising computer program code which, when executed, causes a wireless device to execute the methods described above and below.

According to some aspects, the processing circuitry 12 is configured to cause the wireless device to monitor a paging channel for a paging transmission. According to some aspects, the processing circuitry 12 is configured to cause the wireless device to identify, in the received paging transmission, information defining how to transmit uplink data in response to the paging transmission.

According to some aspects, the processing circuitry 12 is configured to cause the w device to transmit uplink data while keeping or clearing a stored uplink configuration According to some aspects, the processing circuitry 12 is configured to cause the wireless device to transmit uplink data in order to respond to or acknowledge non-paging related data comprised in the paging transmission.

According to some aspects, the information defines uplink resources to be used by the wireless device when responding to the paging or an uplink grant.

According to some aspects the wireless device 10 or the processing circuitry 12 comprises modules configured to perform the methods described above. The modules are implemented in hardware or in software or in a combination thereof. The modules are illustrated in Figure 8b. The modules are according to one aspect implemented as a computer program stored in a memory 13 which run on the processing circuitry 12.

According to some aspects the wireless device 10 or the processing circuitry 12 comprises a monitor module 120 configured to monitor a paging channel for a paging transmission targeting the wireless device.

According to some aspects the wireless device 10 or the processing circuitry 12 comprises a receiver module 121 configured to receive a paging transmission, wherein the paging transmission comprises information defining how to transmit data in response to the paging transmission.

According to some aspects the wireless device 10 or the processing circuitry 12 comprises an identifier 122 configured to identifying, in the received paging transmission, paging response parameters defining how to transmit uplink data in response to the paging transmission.

According to some aspects the wireless device 10 or the processing circuitry 12 comprises a transmitter module 123 configured to transmit uplink data in response to the paging transmission; wherein the uplink data is transmitted in accordance with the information. Aspects of the disclosure are described with reference to the drawings, e.g., block diagrams and/or flowcharts. It is understood that several entities in the drawings, e.g., blocks of the block diagrams, and also combinations of entities in the drawings, can be implemented by computer program instructions, which instructions can be stored in a computer-readable memory, and also loaded onto a computer or other programmable data processing apparatus. Such computer program instructions can be provided to a processor of a general purpose computer, a special purpose computer and/or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks.

In some implementations and according to some aspects of the disclosure, the functions or steps noted in the blocks can occur out of the order noted in the operational illustrations. For example, two blocks shown in succession can in fact be executed substantially concurrently or the blocks can sometimes be executed in the reverse order, depending upon the functionality/acts involved. Also, the functions or steps noted in the blocks can according to some aspects of the disclosure be executed continuously in a loop.

In the drawings and specification, there have been disclosed exemplary aspects of the disclosure. However, many variations and modifications can be made to these aspects without substantially departing from the principles of the present disclosure. Thus, the disclosure should be regarded as illustrative rather than restrictive, and not as being limited to the particular aspects discussed above. Accordingly, although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation.

The description of the example embodiments provided herein have been presented for purposes of illustration. The description is not intended to be exhaustive or to limit example embodiments to the precise form disclosed, and modifications and variations are possible in light of the above teachings or may be acquired from practice of various alternatives to the provided embodiments. The examples discussed herein were chosen and described in order to explain the principles and the nature of various example embodiments and its practical application to enable one skilled in the art to utilize the example embodiments in various manners and with various modifications as are suited to the particular use contemplated. The features of the embodiments described herein may be combined in all possible combinations of methods, apparatus, modules, systems, and computer program products. It should be a ppreciated that the exam ple embodiments presented herein may be practiced in any combination with each other.

It should be noted that the word "com prising" does not necessarily exclude the presence of other elements or steps than those listed and the words "a" or "an" preceding an element do not exclude the presence of a plurality of such elements. It should further be noted that any reference signs do not limit the scope of the claims, that the example embodiments may be implemented at least in part by means of both hardware and software, and that several "means", "units" or "devices" may be represented by the same item of hardware.

The various example embodiments described herein are described in the general context of method steps or processes, which may be implemented in one aspect by a computer program product, embodied in a computer-readable medium, including computer- executable instructions, such as program code, executed by computers in networked environments. A computer-readable medium may include removable and non-removable storage devices including, but not limited to, Read Only Memory (ROM), Random Access Memory (RAM), compact discs (CDs), digital versatile discs (DVD), etc. Generally, program modules may include routines, programs, objects, components, data structures, etc. that performs pa rticular tasks or implement pa rticular abstract data types. Computer-executable instructions, associated data structures, and program modules represent examples of program code for executing steps of the methods disclosed herein. The particular sequence of such executable instructions or associated data structures represents examples of corresponding acts for implementing the functions described in such steps or processes.

Claims

1. A method, performed in a network node, for receiving data from a wireless device, the method comprising:

determining (SI) that a wireless device is expected to transmit uplink data in response to the paging transmission;

- transmitting (S4) the paging transmission, wherein the paging transmission comprises information defining how to transmit uplink data in response to the paging transmission.

2. The method of claim 1, wherein the uplink data that the wireless device is

supposed to transmit is control plane data or user plane data.

3. The method of claim 1 or 2 comprising:

- allocating (S2) uplink resources to be used by the wireless device when responding to the paging transmission.

4. The method of any of the preceding claims, wherein the information defines uplink resources to be used by the wireless device when responding to the paging or an uplink grant.

5. The method of any of the preceding claims comprising:

constructing (S3) a paging transmission such that it comprises information defining how to transmit uplink data in response to the paging transmission.

6. The method of any of the preceding claims comprising:

receiving (S5) uplink data in response to the paging transmission; wherein the uplink data is received in accordance with the information.

7. The method of any of the preceding claims, wherein the determining (SI) comprises determining that an acknowledgement is supposed to be received from the wireless device in response to the paging or that the paging transmission comprises non-paging related data requiring a response.

8. The method of any of the preceding claims, wherein the paging transmission comprises non-paging related data and wherein the information defines how to respond to or acknowledge the non-paging related data.

9. A method, performed in a wireless device, for transmitting uplink data to a network node, the method comprising:

receiving (Sll) a paging transmission, wherein the paging transmission comprises information defining how to transmit data in response to the paging transmission, and

- transmitting (S13) uplink data in response to the paging transmission; wherein the uplink data is transmitted in accordance with the information.

10. The method of claim 9 comprising:

monitoring (S10) a paging channel for a paging transmission.

11. The method of claim 9 or 10, comprising:

identifying (S12), in the received paging transmission, information defining how to transmit uplink data in response to the paging transmission.

12. The method of any of claims 8 to 11, wherein the transmitting (S13) comprises keeping or clearing a stored uplink configuration.

13. The method of any of claims 8 to 12, wherein the transmitting (S13) comprises responding to or acknowledging non-paging related data comprised in the paging transmission.

14. The method of any of claims 8 to 13, wherein the information defines uplink resources to be used by the wireless device when responding to the paging or an uplink grant.

15. The method of any of the preceding claims, wherein the information comprises at least one of:

^■ the type of access for the uplink response,

^■ the amount of data to be transmitted with the uplink, ■ the type of data which may use an uplink grant comprised in the information,

^■ the validity of an uplink grant,

^■ the type of data an uplink grant is intended for,

^■ timing advance to be used by a wireless device when using an uplink grant,

^■ a guard time to be used by the wireless device when using an uplink grant.

16. A network node (20) comprising means adapted to:

- determine (SI) that the wireless device is expected to transmit uplink data in response to the paging transmission; and

transmit (S4) the paging transmission, wherein the paging transmission comprises information defining how to transmit uplink data in response to the paging transmission.

17. The network node of claim 16, wherein the uplink data that the wireless device is supposed to transmit is control plane data or user plane data.

18. The network node of any of claims 16 and 17 comprising means adapted to:

- allocate uplink resources to be used by the wireless device when responding to the paging transmission.

19. The network node of any of claims 16 to 18, wherein the information defines uplink resources to be used by the wireless device when responding to the paging or an uplink grant.

20. The network node of any of claims 16 to 19 comprising means adapted to: - receive (S5) uplink data in response to the paging transmission; wherein the uplink data is received in accordance with the information.

21. The network node of any of claims 16 to 20, wherein the means are adapted to determine that an acknowledgement is supposed to be received from the wireless device in response to the paging or that the paging transmission comprises non- paging related data requiring a response.

22. The network node of any of claims 16 to 21, wherein the paging transmission comprises non-paging related data and wherein the information defines how to respond to or acknowledge the non-paging related data.

23. A network node in a cellular communication network configured for receiving data from a wireless device in response to paging, the network node (20), the network node comprising processing circuitry and memory, said memory comprising instructions executable by said processor whereby said network node is operable to:

determine (SI) that the wireless device is expected to transmit uplink data in response to the paging transmission;

24. A network node (20) in a cellular communication network configured for receiving data from a wireless device in response to paging, the network node (20), comprising:

· a determiner (221) configured to determine that the wireless device is

expected to transmit uplink data in response to the paging transmission; and a

• a transmit module (224) configured to transmit the paging transmission, wherein the paging transmission comprises information defining how to transmit uplink data in response to the paging transmission.

25. A wireless device (10) comprising means adapted to:

receive (Sll) a paging transmission, wherein the paging transmission comprises information defining how to transmit data in response to the paging transmission, and

transmit (S14) uplink data in response to the paging transmission; wherein the uplink data is transmitted in accordance with the information.

26. The wireless device of claim 25 comprising mean adapted to:

monitor (SO) a paging channel for a paging transmission.

27. The wireless device of claim 25 or 26 comprising mean adapted to:

- identify (S12), in the received paging transmission, information defining how to transmit uplink data in response to the paging transmission.

28. The wireless device of any of claims 25 to 27, wherein the means are adapted to transmit uplink data while keeping or clearing a stored uplink configuration.

29. The wireless device of any of claims 25 to 28, wherein the means are adapted to transmit uplink data in order to respond to or acknowledge non-paging related data comprised in the paging transmission.

30. The wireless device of any of claims 25 to 29, wherein the information defines uplink resources to be used by the wireless device when responding to the paging or an uplink grant.

31. A wireless device being configured for transmitting uplink data to a network node in response to paging, the wireless device, the wireless device comprising processing circuitry and memory, said memory comprising instructions executable by said processor whereby said network node is operable to:

receive (Sll) a paging transmission, wherein the paging transmission comprises information defining how to transmit data in response to the paging transmission, and - transmit (S13) uplink data in response to the paging transmission; wherein the uplink data is transmitted in accordance with the information.

32. A wireless device (10) being configured for transmitting uplink data to a network node in response to paging, the wireless device (10) comprising:

• a receiver module (121) configured to receive a paging transmission, wherein the paging transmission comprises information defining how to transmit data in response to the paging transmission, and

• a transmitter module (123) configured to transmit uplink data in response to the paging transmission; wherein the uplink data is transmitted in accordance with the information.

. A computer program comprising computer program code which, when executed, causes a network node to execute the methods according to any of the claims 1-8.

34. A computer program comprising computer program code which, when executed, causes a wireless device (10) to execute the methods according to any of the claims 9-15.