WO2017176181A1

WO2017176181A1 - Control transmission in a wireless communication network

Info

Publication number: WO2017176181A1
Application number: PCT/SE2016/050291
Authority: WO
Inventors: Pernilla BERGMARK; Konstantinos Vandikas; Rafia Inam; Sibel TOMBAZ
Original assignee: Telefonaktiebolaget Lm Ericsson (Publ)
Priority date: 2016-04-07
Filing date: 2016-04-07
Publication date: 2017-10-12

Abstract

It is presented a method for control transmission in a wireless communication network (5). The method is performed in a network node (3) of the wireless communication network and comprises the steps of receiving (60) paging information from a stationary wireless device (1; 2) comprising an indication of delay-insensitive data requirement and of being stationary; selecting (61) a serving base station (3) for the stationary wireless device; and transmitting (63) a energy efficient control signalling configuration to the stationary wireless device. It is also presented a method in a stationary wireless device, a network node, a stationary wireless device, a computer program and a computer program product.

Description

CONTROL TRANSMISSION IN A WIRELESS COMMUNICATION

NETWORK

TECHNICAL FIELD

The invention relates to a method for control transmission in a wireless communication network, and a network node, a stationary wireless device, a computer program and a computer program product therefor.

BACKGROUND

There is an expectation of about 50-100 billion of connected wireless devices in mobile radio networks by 2020 and beyond. Providing connectivity for this number of wireless devices is a big challenge for mobile radio networks mainly due to the high number of simultaneous connections. However, the connectivity requirements for such wireless devices compared to traditional mobile broadband users are further different.

SUMMARY

It is an object of the invention to reduce energy consumption in wireless communication network.

According to a first aspect, it is presented a method for control transmission in a wireless communication network. The method is performed in a network node of the wireless communication network and comprises the steps of receiving paging information from a stationary wireless device comprising an indication of delay-insensitive data requirement and of being stationary, selecting a serving base station for the stationary wireless device, and transmitting a energy efficient control signalling configuration to the stationary wireless device. By the presented method, reduced overhead for a wireless access network while serving millions of stationary wireless devices is achieved, providing increased performance for mobile broadband of the wireless access network, and reduced energy consumption for the wireless access network. Further, by increasing the sleep duration for the stationary wireless devices, battery life thereof can be increased due to reduced non-data related transmission and reception.

The method may further comprise a step of determining a periodicity of transmissions between the stationary wireless device and the serving base station.

The method may further comprise a step scheduling a user data transmission time for a stationary wireless device, wherein the network node is serving the stationary wireless device, and wherein the user data transmission time is scheduled to a transmission time interval (TTI) already scheduled for control signalling.

By scheduling delay incentive user data together with already scheduled control signalling, the load of the wireless communication network is further reduced, and thus the energy consumption. This is achieved by enabling longer micro-level sleep in the base stations. Consequently, this also increases quality of services for delay sensitive user data due to reduction in inter-cell interference.

The method may further comprise the steps of: transmitting user data according to scheduled TTI, and waiting the determined periodicity before signalling between the serving base station and the stationary wireless device. The stationary wireless device may be a capillary gateway.

The stationary wireless device may be in connectivity with the network node through a capillary gateway.

According to a second aspect, it is presented a method for control

transmission in a wireless communication network. The method is performed in a stationary wireless device of the wireless communication network and comprises the steps of transmitting paging information comprising an indication of delay-insensitive data requirement and of being stationary to a serving base station, and receiving a energy efficient control signalling configuration from a serving base station selected by a network node. By the presented method, reduced overhead for a wireless access network while serving millions of stationary wireless devices is achieved, providing increased performance for mobile broadband of the wireless access network, and reduced energy consumption for the wireless access network. Further, by increasing the sleep duration for the stationary wireless devices, battery life thereof can be increased due to reduced non-data related transmission and reception.

The method may comprise a further step of storing the user data to be sent in the scheduled transmission time interval. According to a third aspect, it is presented a network node for control transmission in a wireless communication network. The network node comprises: a processor, and a computer program product storing instructions that, when executed by the processor, causes the network node to: receive paging information from a stationary wireless device comprising an indication of delay-insensitive data requirement and of being stationary, select a serving base station for the stationary wireless device, and transmit a energy efficient control signalling configuration to the stationary wireless device.

According to a fourth aspect, it is presented a stationary wireless device for control transmission in a wireless communication network. The stationary wireless device comprises: a processor; and a computer program product storing instructions that, when executed by the processor, causes the stationary wireless device to: transmit paging information comprising an indication of delay-insensitive data requirement and of being stationary to a serving base station, and receive a energy efficient control signalling configuration from a serving base station selected by a network node.

According to a fifth aspect, it is presented a network node for control transmission in a wireless communication network. The network node comprises: a communication manager configured to receive paging information from a stationary wireless device comprising an indication of delay-insensitive data requirement and of being stationary, select a serving base station for the stationary wireless device; and transmit a energy efficient control signalling configuration to the stationary wireless device.

According to a sixth aspect, it is presented a stationary wireless device for control transmission in a wireless communication network. The stationary wireless device comprises: a communication manager configured to transmit paging information comprising an indication of delay-insensitive data requirement and of being stationary to a serving base station, and receive a energy efficient control signalling configuration from a serving base station selected by a network node.

According to a seventh aspect, it is presented a computer program for control transmission in a wireless communication network. The computer program comprises computer program code which, when run on a processor of a network node in the wireless communication network, causes the network node to: receive paging information from a stationary wireless device comprising an indication of delay-insensitive data requirement and of being stationary, select a serving base station for the stationary wireless device, and transmit a energy efficient control signalling configuration to the stationary wireless device. According to an eighth aspect, it is presented a computer program for control transmission in a wireless communication network. The computer program comprises computer program code which, when run on a processor of stationary wireless device in the wireless communication network, causes the stationary wireless device to: transmit paging information comprising an indication of delay-insensitive data requirement and of being stationary to a serving base station, and receive a energy efficient control signalling configuration from a serving base station selected by a network node.

According to a ninth aspect, it is presented a computer program product comprising a computer program and a computer readable storage means on which the computer program is stored. Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the element, apparatus, component, means, step, etc." are to be interpreted openly as referring to at least one instance of the element, apparatus, component, means, step, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is now described, by way of example, with reference to the accompanying drawings, in which:

Fig. l is a schematic diagram illustrating an environment where

embodiments presented herein can be applied;

Fig. 2 is a schematic sequence chart illustrating an embodiment presented herein; Fig- 3 is schematic illustration of TTI scheduling presented herein;

Fig. 4 is a schematic sequence chart illustrating an embodiment presented herein;

Fig. 5 is a schematic diagram illustrating some components of a network node or a wireless device; Figs. 6A-6B are flow charts illustrating methods for embodiments presented herein; and

Fig. 7 is a schematic diagram showing functional modules of a network node or a wireless device.

DETAILED DESCRIPTION

The invention will now be described more fully hereinafter with reference to the accompanying drawings, in which certain embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided by way of example so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like numbers refer to like elements throughout the description.

Stationary wireless devices, such as internet of things (IoT) devices, usually uses small amount of data transmission in every session, the frequency and timing of the large amount of IoT transmissions and the need of periodic signalling can significantly harm mobile network operations, such as degrade quality of services (QoS) for mobile broadband (mBB) users and also increased energy consumption for the mobile network. In order to enable economically sustainable mobile networks, the connectivity process for IoT applications should be designed with the objective of minimum energy consumption for mobile radio networks considering the increased number of connected IoT devices.

Fig. 1 schematically illustrates an environment wherein embodiments of the solution presented herein can be implemented. A stationary wireless device 1 is in connectivity with a capillary gateway, in turn in connectivity with an evolved node B (eNB) 3, in turn connected to a core network 4 of a wireless communication network, all being part of a wireless communication network

5·

A solution is presented that provides the possibility to reduce energy consumption of wireless communication networks by introducing an energy- optimum connectivity decision for delay insensitive stationary wireless devices.

The solution is additionally useful for battery powered IoT devices, since they can get a longer batter life due to the reduced non-data-related transmission and reception. A typical example of a battery powered IoT device is a sensor living on years-long battery life. In case of stationary wireless devices, wireless communication networks can significantly reduce the time for a random access process, when the stationary wireless device requests transmission, and a cell search process, when the stationary wireless device connects to the network, by utilizing a stationary profile of the stationary wireless device. The stationary profile may comprise their respective locations, delay requirements, periodicity of the transmission etc.

A way to achieve utilization of a stationary profile, is that the wireless communication network will use the knowledge of the location of the stationary wireless devices in order to pre-decide a serving base station (BS) for each stationary wireless device by simply selecting the closest BS. This information may be stored at each eNB of the service area of the stationary wireless device. The selection of a serving BS for each stationary wireless device is made in a network node of the wireless communication network. The network node may e.g. be a base station, a baseband unit (i.e. containing part of the base station functionality), a controller node (such as a cluster head or a radio network controller) or a core network node (such as a Mobility Management Entity MME).

A way to provide a stationary profile is in detail presented with reference to Fig. 2. A CGW sends paging information to multiple eNBs, #1-3, in a predefined area. The CGW can inform of its stationary location, delay requirements etc. The network finds the closest eNB, e.g. eNB#i, is selected as the serving eNB and the network informs the eNBs that have received the paging information about the respondent eNB to serve the CGW. The other eNB stops listening to further messages from the CGW. This information exchange is done only once for each CGW in order to set the serving eNB and thereby reduce the overhead of random access processes and sell search processes.

The serving eNB#i informs the CGW that it is the serving eNB and will be responsible for the connectivity of the CGW. In this way, the CGW will not need to periodically send paging and cell-selection related signalling. The eNB#i sends information of its location, frequency etc. The location may be used to calculate an expected transmit-receive time.

The CGW acknowledges the received information and may send detailed information about its capabilities, such as delay requirement, amount of data per session, periodicity of transmissions (T) etc. If the CGW sends detailed information of its capabilities, the eNB#i sends an acknowledgment thereto.

After that the serving eNB has been selected and a stationary profile has been registered at the serving eNB, further communication can be made in an energy efficient way. The CGW has correspondingly registered transmission parameters.

The eNB#i knows the transmission time T, from the periodicity of

transmissions and thus that the CGW needs to make a transmission at time T. With this pre-knowledge the eNB#i can schedule a transmission time for the CGW considering the available radio access technologies (RATs) in eNB#i.

After transmissions have been made, both the CGW and the eNB awaits a periodicity without further signalling therebetween.

In case of long term evolution (LTE) being selected to server an IoT device, a transmission time interval (TTI) wherein some of the resource blocks (RBs) are already scheduled for non-data-related transmission, i.e. control signalling. This will minimize the TTI utilization and enable longer micro- level sleep in LTE radios as illustrated in Figure 3. User data of Appi is scheduled to be sent only those TTIs in which the radio base station is already signalling. This energy efficient data scheduling decision will not affect the quality of services of the CGW ad data transmission is known to be delay- insensitive. This process is repeated in the serving evolved node B (eNB) for each IoT device based on a required periodicity of the transmission of delay insensitive IoT devices in the area. Consequently, an eNB will inform each IoT device about its scheduling decisions. One or more IoT device may use an unlicensed spectrum domain (i.e. Zigbee, WIFI, etc) and are in such a case connected to a Capillary Gateway (CGW) which is capable of communicating with an RBS using a licensed spectrum radio access technology (RAT). The CGW can be any kind of user equipment (UE) that can be connected in a telecommunications network. A stationary wireless device may connect directly to the BS when it has that capacity. As long as it is a stationary wireless device, the energy efficient communication may be utilized.

In case a serving eNB stops working, a stationary wireless device or a CGW may start a new procedure to find a new serving eNB for further energy efficient communication.

A way to choose a serving BS for a CGW is presented with reference to Fig. 4. All eNBs have the ability to log, for a period of time, which devices are connected to them, e.g. for a day. The CGW chooses eNB#i as serving BS, arbitrarily or the selection may be the outcome of a more sophisticated process that either fulfils shortest distance between the CGW and the eNB or load balancing since either eNBs maybe overloaded. In more extreme scenarios it may even be opportunistic, a temporary choice of eNB due to maintenance reasons. The eNB#i acknowledges the CGW selection and logs the connection to the CGW and checks how many times the CGW has connected to other BSs nearby, eNBX to eNBN. The most frequent (MF) serving eNB, during the period of time, is selected as serving BS.

While the eNB#i and/or the CGW are still in the process of trying to connect to an eNB no payload data-transmission take place from the CGW meaning that the CGW should have a capable buffer to store user data to be

transmitted. The CGW may further have the ability to perform compression to the user data that it is about to transmit in order to make sure that the data (even though delay insensitive) are still available for a future transmission without being discarded. The eNB#i registers a profile for the mobile station international subscriber directory number (MSISDN) and sends an instruction to the CGW to use the MFeNB as serving BS.

The CGW then choses the MFeNB as serving BS, and the MFeNB

acknowledges the selection.

A method, according to an embodiment, for control transmission in a wireless communication network 5, is presented with reference to Figs. 6A- 6B. The method comprises the steps of receiving 60 paging information from a stationary wireless device 1 or 2 comprising an indication of delay- insensitive data requirement and of being stationary, selecting 61 a serving base station 3 for the stationary wireless device, and transmitting 63 a energy efficient control signalling configuration to the stationary wireless device.

The method may comprise the further step of determining 62 a periodicity of transmissions between the stationary wireless device and the serving base station, which is illustrated in Fig. 6B.

The method may comprise the further step of scheduling 64 a user data transmission time for a stationary wireless device, wherein the network node is serving the stationary wireless device, and wherein the user data

transmission time is scheduled to a transmission time interval (TTI) already scheduled for control signalling. The method may comprise the further steps of: transmitting 65 user data according to scheduled TTI, and waiting 66 the determined periodicity before signalling between the serving base station and the stationary wireless device.

The stationary wireless device 2 may be a capillary gateway 2. The stationary wireless device 1 may be in connectivity with the network node 3 through a capillary gateway 2.

A method, according to an embodiment, for control transmission in a wireless communication network 5, is presented with reference to Fig. 6B. The method is performed in a stationary wireless device 1 or 2 of the wireless communication network and comprises the steps of transmitting 67 paging information comprising an indication of delay-insensitive data requirement and of being stationary to a serving base station 3, and receiving 68 a energy efficient control signalling configuration from a serving base station 3 selected by a network node 3, 4.

The method may comprise a further step of transmission 70 of user data to a serving base station 3 at a user data transmission time, wherein the user data transmission time is scheduled to a transmission time interval (TTI) already scheduled for control signalling for the serving base station. The method may comprise a further step of storing 69 the user data to be sent in the scheduled TTI.

A network node, according to an embodiment, for control transmission in a wireless communication network 5, is presented with reference to Fig. 5. The network node 6 comprises: a processor 10, and a computer program product 12, 13 storing instructions that, when executed by the processor, causes the network node to: receive 60 paging information from a stationary wireless device 1 or 2 comprising an indication of delay-insensitive data requirement and of being stationary, select 61 a serving base station 3 for the stationary wireless device, and transmit 63 a energy efficient control signalling configuration to the stationary wireless device.

A stationary wireless device, according to an embodiment, for control transmission in a wireless communication network 5, is presented with reference to Fig. 5. The stationary wireless device 6 comprises: a processor 10; and a computer program product 12, 13 storing instructions that, when executed by the processor, causes the stationary wireless device to: transmit

67 paging information comprising an indication of delay-insensitive data requirement and of being stationary to a serving base station 3, and receive

68 a energy efficient control signalling configuration from a serving base station 3 selected by a network node 3, 4. A network node, according to an embodiment, for control transmission in a wireless communication network 5, is presented with reference to Fig. 7. The network node 6 comprises: a communication manager 71 configured to receive 60 paging information from a stationary wireless device 1 or 2 comprises an indication of delay-insensitive data requirement and of being stationary, select 61 a serving base station 3 for the stationary wireless device, and transmit 63 a energy efficient control signalling configuration to the stationary wireless device.

A stationary wireless device, according to an embodiment, for control transmission in a wireless communication network 5, is presented with reference to Fig. 7. The stationary wireless device 6 comprises: a

communication manager 71 configured to transmit 67 paging information comprising an indication of delay-insensitive data requirement and of being stationary to a serving base station 3, and receive 68 a energy efficient control signalling configuration from a serving base station 3 selected by a network node 3, 4.

A computer program 14, 15, according to an embodiment, for control transmission in a wireless communication network 5, is presented with reference to Fig. 5. The computer program comprising computer program code which, when run on a processor 10 of a network node 6 in the wireless communication network, causes the network node to: receive 60 paging information from a stationary wireless device 1 or 2 comprising an indication of delay-insensitive data requirement and of being stationary, select 61 a serving base station 3 for the stationary wireless device, and transmit 63 a energy efficient control signalling configuration to the stationary wireless device.

A computer program 14, 15, according to an embodiment, for control transmission in a wireless communication network 5, is presented with reference to Fig. 5. The computer program comprising computer program code which, when run on a processor 10 of stationary wireless device 6 in the wireless communication network, causes the stationary wireless device to: transmit 67 paging information comprising an indication of delay-insensitive data requirement and of being stationary to a serving base station 3, and receive 68 a energy efficient control signalling configuration from a serving base station 3 selected by a network node 3, 4. A computer program product 12, 13, according to an embodiment presented herein, comprises a computer program 14, 15 and a computer readable storage means on which the computer program 14, 15 is stored.

Fig. 5 is a schematic diagram showing some components of the network node 3, 4 or the stationary wireless device 1 or CGW 2, generically numbered 6. A processor 10 may be provided using any combination of one or more of a suitable central processing unit, CPU, multiprocessor, microcontroller, digital signal processor, DSP, application specific integrated circuit etc., capable of executing software instructions of a computer program 14 stored in a memory. The memory can thus be considered to be or form part of the computer program product 12. The processor 10 may be configured to execute methods described herein with reference to Figs. 6A-6B.

The memory may be any combination of read and write memory, RAM, and read only memory, ROM. The memory may also comprise persistent storage, which, for example, can be any single one or combination of magnetic memory, optical memory, solid state memory or even remotely mounted memory.

A second computer program product 13 in the form of a data memory may also be provided, e.g. for reading and/ or storing data during execution of software instructions in the processor 10. The data memory can be any combination of read and write memory, RAM, and read only memory, ROM, and may also comprise persistent storage, which, for example, can be any single one or combination of magnetic memory, optical memory, solid state memory or even remotely mounted memory. The data memory may e.g. hold other software instructions 15, to improve functionality for the network node 3 or the stationary wireless device 1 or 2. The network node 3, 4 or stationary wireless device 1 or 2 may further comprise an input/output, I/O, interface 11 including e.g. a user interface. The network node or stationary wireless device may further comprise a receiver configured to receive signalling from other nodes, and a transmitter configured to transmit signalling to other nodes (not illustrated). Other components of the network node or stationary wireless device are omitted in order not to obscure the concepts presented herein.

Fig. 7 is a schematic diagram showing functional blocks of the network node 3, 4 or the stationary wireless device 1 or CGW 2, generically numbered 6. The modules may be implemented as only software instructions such as a computer program executing in the cache server or only hardware, such as application specific integrated circuits, field programmable gate arrays, discrete logical components, transceivers, etc. or as a combination thereof. In an alternative embodiment, some of the functional blocks may be

implemented by software and other by hardware. The modules correspond to the steps in the methods illustrated in Figs. 6A-6B, comprising a

communication manager unit 71 and an allocation manager 72. In the embodiments where one or more of the modules are implemented by a computer program, it shall be understood that these modules do not necessarily correspond to process modules, but can be written as instructions according to a programming language in which they would be implemented, since some programming languages do not typically contain process modules.

The allocation manager 72 is for control transmission in a wireless

communication network. This module corresponds to the schedule step 64 of Fig. 6B, the determine step 62 of Fig. 6B, and the wait step 66 of Fig. 6B. This module can e.g. be implemented by the processor 10 of Fig. 5, when running the computer program.

The communication manger 71 is for controlling wireless communication with the wireless communication network. This module corresponds to the receive step 60, the select step 61, the transmit step 63 of Figs. 6A and 6B, the transmit step 65, the transmit step 67, the receive step 68, the store step 69, and the transmission step 70 of Fig. 6B. This module can e.g. be implemented by the processor 10 of Fig. 5, when running the computer program.

The invention has mainly been described above with reference to a few embodiments. However, as is readily appreciated by a person skilled in the art, other embodiments than the ones disclosed above are equally possible within the scope of the invention, as defined by the appended patent claims.

Claims

l6 CLAIMS

1. A method for control transmission in a wireless communication network (5), the method being performed in a network node (3; 4) of the wireless communication network and comprising the steps of: receiving (60) paging information from a stationary wireless device (1; 2) comprising an indication of delay-insensitive data requirement and of being stationary; selecting (61) a serving base station (3) for the stationary wireless device; and transmitting (63) a energy efficient control signalling configuration to the stationary wireless device.

2. The method according to claim 1, comprising a further step of

determining (62) a periodicity of transmissions between the stationary wireless device and the serving base station.

3. The method according to claim 1 or 2, comprising the further step of scheduling (64) a user data transmission time for a stationary wireless device, wherein the network node (3) is serving the stationary wireless device, and wherein the user data transmission time is scheduled to a transmission time interval (TTI) already scheduled for control signalling.

4. The method according to claim 3, comprising the further steps of: transmitting (65) user data according to scheduled TTI; and waiting (66) the determined periodicity before signalling between the serving base station and the stationary wireless device.

5. The method according to any one of claims 1 to 4, wherein the

stationary wireless device (2) is a capillary gateway (2).

6. The method according to any one of claims 1 to 4, wherein the stationary wireless device (1) is in connectivity with the network node (3) through a capillary gateway (2).

7. A method for control transmission in a wireless communication network (5), the method being performed in a stationary wireless device (1; 2) of the wireless communication network and comprising the steps of: transmitting (67) paging information comprising an indication of delay- insensitive data requirement and of being stationary to a serving base station (3); and receiving (68) a energy efficient control signalling configuration from a serving base station (3) selected by a network node (3; 4).

8. The method according to claim 7, wherein the energy efficient control signalling configuration comprises a periodicity of transmissions between the stationary wireless device and the serving base station.

9. The method according to claim 7 or 8, comprising a further step of transmission (70) of user data to a serving base station (3) at a user data transmission time, wherein the user data transmission time is scheduled to a transmission time interval (TTI) already scheduled for control signalling for the serving base station.

10. The method according to any one of claims 7 to 9, wherein the stationary wireless device (2) is a capillary gateway (2).

11. The method according to any one of claims 7 to 9, wherein the stationary wireless device (1) is in connectivity with the network node (3) through a capillary gateway (2).

12. The method according to any one of claims 7 to 11, comprising a further step of storing (69) the user data to be sent in the scheduled TTI. l8

13. A network node for control transmission in a wireless communication network (5), the network node (6) comprising: a processor (10), and a computer program product (12, 13) storing instructions that, when executed by the processor, causes the network node to: receive (60) paging information from a stationary wireless device (1; 2) comprising an indication of delay-insensitive data requirement and of being stationary; select (61) a serving base station (3) for the stationary wireless device; and transmit (63) a energy efficient control signalling configuration to the stationary wireless device.

14. The network node according to claim 13, wherein the network node further is caused to determine (62) a periodicity of transmissions between the stationary wireless device and the serving base station.

15. The network node according to claim 13 or 14, wherein the network node further is caused to schedule (64) a user data transmission time for a stationary wireless device (1; 2), wherein the network node (3) is serving the stationary wireless device, and wherein the user data transmission time is scheduled to a transmission time interval (TTI) already scheduled for control signalling.

16. The network node according to claim 15, wherein the network node further is caused to: transmit (65) user data according to scheduled TTI; and wait (66the determined periodicity before signalling between the serving base station and the stationary wireless device.

17. The network node according to any one of claims 13 to 16, wherein the stationary wireless device (2) is a capillary gateway (2).

18. The network node according to any one of claims 13 o 16, wherein the stationary wireless device (1) is in connectivity with the network node (3) through a capillary gateway (2).

19. A stationary wireless device for control transmission in a wireless communication network (5), the stationary wireless device (6) comprising: a processor (10); and a computer program product (12, 13) storing instructions that, when executed by the processor, causes the stationary wireless device to: transmit (67) paging information comprising an indication of delay- insensitive data requirement and of being stationary to a serving base station (3); and receive (68) a energy efficient control signalling configuration from a serving base station (3) selected by a network node (3; 4).

20. The stationary wireless device according to claim 19, wherein the energy efficient control signalling configuration comprises a periodicity of transmissions between the stationary wireless device and the serving base station.

21. The stationary wireless device according to claim 19 or 20, wherein the stationary wireless device is further cause to transmit (70) user data to a serving base station (3) at a user data transmission time, wherein the user data transmission time is scheduled to a transmission time interval (TTI) already scheduled for control signalling for the serving base station.

22. The stationary wireless device according to any one of claims 19 to 21, wherein the stationary wireless device (6) is a capillary gateway (2).

23. The stationary wireless device according to any one of claims 19 to 21, wherein the stationary wireless device (6) is in connectivity with the network node (3) through a capillary gateway (2).

24. The stationary wireless device according to any one of claims 19 to 23, further caused to store (69) the user data to be sent in the scheduled TTL

25. A network node for control transmission in a wireless communication network, the network node (6) comprising: a communication manager (71) configured to receive (60) paging information from a stationary wireless device (1; 2) comprising an indication of delay- insensitive data requirement and of being stationary; select (61) a serving base station (3) for the stationary wireless device; and transmit (63) a energy efficient control signalling configuration to the stationary wireless device.

26. A stationary wireless device for control transmission in a wireless communication network (5), the stationary wireless device (6) comprising: a communication manager (71) configured to transmit (67) paging

information comprising an indication of delay-insensitive data requirement and of being stationary to a serving base station (3); and receive (68) a energy efficient control signalling configuration from a serving base station (3) selected by a network node (3; 4).

27. A computer program (14, 15) for control transmission in a wireless communication network (5), the computer program comprising computer program code which, when run on a processor (10) of a network node (6) in the wireless communication network, causes the network node to: receive (60) paging information from a stationary wireless device (1; 2) comprising an indication of delay-insensitive data requirement and of being stationary; select (61) a serving base station (3) for the stationary wireless device; and transmit (63) a energy efficient control signalling configuration to the stationary wireless device.

28. A computer program (14, 15) for control transmission in a wireless communication network (5), the computer program comprising computer program code which, when run on a processor (10) of stationary wireless device (6) in the wireless communication network, causes the stationary wireless device to: transmit (67) paging information comprising an indication of delay-insensitive data requirement and of being stationary to a serving base station (3); and receive (68) a energy efficient control signalling configuration from a serving base station (3) selected by a network node (3; 4).

29. A computer program product (12, 13), comprising a computer program (14, 15) according to claim 27 or 28 and a computer readable storage means on which the computer program (14, 15) is stored.