WO2014036692A1 - Energy saving mode management for a network element - Google Patents
Energy saving mode management for a network element Download PDFInfo
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- WO2014036692A1 WO2014036692A1 PCT/CN2012/080981 CN2012080981W WO2014036692A1 WO 2014036692 A1 WO2014036692 A1 WO 2014036692A1 CN 2012080981 W CN2012080981 W CN 2012080981W WO 2014036692 A1 WO2014036692 A1 WO 2014036692A1
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- energy saving
- saving mode
- cell
- network element
- network
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- 230000007774 longterm Effects 0.000 claims description 15
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- 238000004891 communication Methods 0.000 claims description 10
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- 238000012544 monitoring process Methods 0.000 claims description 7
- 230000015654 memory Effects 0.000 claims description 6
- 238000010295 mobile communication Methods 0.000 claims description 6
- 230000011664 signaling Effects 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 5
- 238000007619 statistical method Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
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- 238000007726 management method Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
- H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
In the arrangement cells of the network are switched into an energy saving mode according to the predetermined conditions when the load of the cell is low. In the arrangement a reduced density broadcast signals are transmitted in order to maintain the service available. With the reduced density broadcast signals in accordance with the arrangement energy saving is achieved in a manner that maintains the service available within the cell. Mobile devices within or entering the cell are indicated about the energy saving mode accordingly.
Description
ENERGY SAVING MODE MANAGEMENT FOR A NETWORK ELEMENT
FIELD OF THE INVENTION
The invention relates to radio communication net- works and devices used in such network. The invention particularly relates to network elements sending broadcast signals.
BACKGROUND OF THE INVENTION
The power consumption has always been important issue in mobile device design. For example, it is carefully handled for the user equipment (UE) in Long Term Evolution standardization due to the limited power supplies. However, the power consumption on the network side has been less discussed. The network is deemed as power sufficient and the focus has been more on the network capacity and coverage. However, the situation is changing due to the fast increasing concern on the carbon footprint and the operator costs. Although the information and telecommunication industry only accounts for a relatively small portion of the overall energy consumption of human being' s activity, it is imperative to make it more power efficient given the mobile communication sector is about to tri- pie by 2020.
Current Long Term Evolution enhanced node B (eNB) must keep on transmitting downlink (DL) signals no matter if there is UE to serve. This requirement applies already to older technologies in most of the cases. In the Long Term Evolution these signals include a broadcast signals, such as the primary synchronization sequence (PPS) , Secondary Synchronization sequence (SSS) , Master Information Block (MIB) and Common Reference Signal (CRS) . This mandatory trans- mission wastes a great amount of energy as the network is under low load most of the time. Significant power
saving is possible if the future wireless networks could intelligently avoids these wastes.
Several approaches have been already discussed. For example, a standalone new carrier type (SA-NCT) is considered to be one of the important topics . A more power efficient lean carrier has been proposed by to increase the power efficiency. Another example is the local area network, where the cell size is considerably smaller than a typical macro cell. In this case the local area cell may serve only a few of UEs, sometimes there are even no UE served and the load may undergo large variance from time to time. Thus power saving could be achieved by accommodating this variance .
Among those power efficiency techniques, a sleeping mode is a very effective way to reduce power consumption. A cell is either "on" for normal transmission or "off" for power saving. This scheme is not applicable for situation where there is at least one mo- bile device that needs to be served as as turning off a cell will totally block the mobile devices from access given the cell may not have an overlapping neighbor.
In a further proposal for Long Term Evolution so called "probing mechanism" is used to determine in a system which cell(s) may be activated, i.e., to move out of sleeping mode or deactivated, i.e., to move into sleeping mode. In such mechanism, at least a portion of the UEs within a macro cell #A' s coverage will be configured to measure certain downlink pilots from some other smaller cells and report accordingly the measurements to cell #A. The network can decide based on the collected measurements and UE traffic status which small cell(s) need to be activated or can stay in deactivated state. However, such probing mechanism requires a macro cell is always on and UEs are connected to it for the sake of configuration and report-
ing, and it may need inter-eNB signaling for activation or deactivation request as well. Therefore, it is not straightforward to extend such mechanism to standalone new carrier types.
Thus, there is a need for further energy efficiency improvements that at the same time allow flexibility in the future network development. The flexibility is of particular interest as dependencies to other features may prevent the use of the improvement as the improvement needs to be accepted into a standard.
SUMMARY
The invention discloses an energy saving manage- ment arrangement for telecommunication networks. In the arrangement cells of the network are switched into an energy saving mode according to the predetermined conditions when the load of the cell is low. In the arrangement a reduced density broadcast signals are transmitted in order to maintain the service available. With the reduced density broadcast signals in accordance with the arrangement energy saving is achieved in a manner that maintains the service available within the cell. Mobile devices within or entering the cell are indicated about the energy saving mode accordingly.
According to the invention a network element, such as a base station, relay node or other similar element sending broadcast signals, only transmits minimum broadcast signal in the energy saving mode so that the power amplifier (PA) could be turned off most of the time to save power. The base station is configured to come back to active mode when service is needed.
A critical issue is to define an efficient energy saving mode that saves power but suffers no significant performance loss. Thus the minimum broadcast signal shall be firstly considered. This is because the
broadcast signal is essential for an UE at the initial access stage. Thus it is difficult to make it UE specific and transmit only on need. In addition, the periodic transmission of these broadcast signals re- quires frequently turning PA on. A further problem is how the UE knows the energy saving mode at different stages as the energy saving mode most probably has an impact to the UE behavior.
In an embodiment of the invention a method for switching a radio network element into an energy saving mode is implemented and executed in a radio network element, such as a cell of a radio communication network. Examples of applicable radio communication network are Long Term Evolution network and Long Term Evolution Advanced. Correspondingly an example such network element is enhanced node B. However, the invention is not limited to these examples but may be used in all radio communication networks requiring periodical transmissions of broadcast signals of various purposes.
In the embodiment first the load of a cell is determined. As a response to the determined load of the cell the an energy saving mode is selected from a predetermined set of energy saving modes. At least one of the energy saving modes in the predetermined set of energy saving modes comprises transmitting broadcast signals at reduced density. The selected energy saving mode is then applied in the cell. Lastly the energy saving mode is indicated to devices connected to the radio network element.
In an embodiment of the invention the load of a cell is determined by monitoring the cell. In a further embodiment of the invention the load of a cell is determined by statistical analysis. For example, it may be analyzed that low load period starts Fridays earlier than other weekdays and the cell may be switched to energy saving mode earlier.
In an embodiment of the invention the energy saving mode is indicated to devices by separate signaling. In a further embodiment of the invention the energy saving mode is indicated to devices implicitly the en- ergy saving mode by using a predetermined pattern in the broadcast. In the implicit indication a predetermined pattern is detected and based on the pattern the device is able to decide the energy saving mode to be used. In a further embodiment of the invention the en- ergy saving mode is indicated by including an indication in an existing information block.
Various configurations of broadcast patterns may be used by embodiments of the invention. The energy saving mode may involve a legacy broadcast pattern, wherein the density of transmissions is reduced or a specially designed broadcast signal.
The above described embodiment is preferably implemented as a method performed in a base station. The implementation may involve a computer program that is executed in the base station and the execution is adapted to cause the method.
As a response to the indication a terminal device operating in the network is configured to receive the indication of an energy saving mode from a base sta- tion and to apply the indicated energy saving mode in the communication. It is possible to receive the indication implicitly in a form of predetermined broadcast pattern .
A benefit of the present invention is that it pro- vides possibility to use different power saving modes in a manner that the cell is maintained in service. A further benefit of invention is that the network is able to choose from a plurality of different energy saving modes. Thus, it is possible to combine differ- ent energy saving modes for providing the biggest energy savings in varying conditions . This facilitates the possibility to choose the most energy efficient
operating mode at the cell level, which naturally results reduced overall operating cost of the complete network .
A further benefit of the invention is that is does set any unnecessary restrictions so that also other energy saving solutions may be used together with the solution of the present application.
BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings, which are included to provide a further understanding of the invention and constitute a part of this specification, illustrate embodiments of the invention and together with the de- scription help to explain the principles of the invention. In the drawings:
Fig. 1 is a block diagram of an embodiment according to the present invention,
Fig. 2 is a flowchart of an embodiment according to the present invention, and
Fig. 3 discloses examples of PSS/SSS broadcast patterns ,
Fig. 4 discloses examples density of MIB in PSS/SSS patterns,
Fig. 5 discloses an example of new broadcast signal , and
Fig. 6 discloses examples of a PSS/SSS sequences for indicating energy saving mode. DETAILED DESCRIPTION OF THE INVENTION
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings.
Figure 1 discloses a block diagram of an embodi- ment according to the present invention. The mobile communication network comprises a base station 10 and
three mobile devices 11, 12 and 13. The network may be any type of mobile network, such as a Long Term Evolution network, which is used as an example in the following description. Devices 11, 12 and 13 are capable of communicating with a base station from a distance. The maximum distance varies according to the characteristics and configuration of the used network. In the case of device 11 it is illustrated that the device comprises a processor 14, a memory 15, a network connection 16 for communicating with the base station 10. The corresponding components are also arranged to devices 12 and 13; however, they are not drawn for the sake of clarity. The base station is connected to a network element 19 that comprises processor 17 and a memory 18. The network element 19 may be implemented integrally in the base station or can be a separate component .
Figure 2 discloses a flow diagram of a method according the present invention. The method is initiated by determining a load situation in a cell. Typically a low load situation is determined. The low load situation needs not to be a situation without load at all but a network designer may choose any load level he considers low. Furthermore, if the cell is already op- erating in an energy saving mode, the determined load might also be higher when compared to the moment when the energy saving mode was chosen. The actual determination can be based on continuous monitoring, statistical analysis scheduling or designer choice, step 20. For example, if a cell is located in an office building, it is likely that load is low during night and weekends. Furthermore, when the determination is based on the continuous monitoring it is possible that based on the monitoring the energy saving mode is changed because of the change of the load. Thus, the method is not always started from the normal operating mode but
it may be applied also to the change of the energy saving mode from one to another.
In the next step an appropriate energy saving mode is selected, step 21. The energy saving mode is chosen from a plurality of different energy saving modes, wherein at least one of energy saving modes involves reduced density of broadcast signals. The choosing may be based on various variables, such as the actual monitored load, date and time and other network design Energy saving modes and their broadcast patterns are later discussed in detail with referral to figures 3 - 5. Then the selected energy saving mode is applied to the cell, step 22. Thus, the base station starts transmitting broadcast signals according to the se- quence .
The applied energy saving mode is then indicated to all devices, step 23. For connected UEs, it is easy to indicate the energy saving mode mode via dedicated or broadcasted signals. When the base station is about to enter energy saving mode, it may send the UEs Radio Resource Control (RRC) signaling to indicate this mode change or place the indication in the system information broadcast such as MIB and SIBs . The content of the indication varies depending on the embodiment. For example, it is possible to provide a complete information of the broadcast signal with the indication. In a further option the indication comprises just indication that the mode will be changed. A further design choice is that the energy saving modes are standard- ized as well and the indication includes the indication of which energy saving mode is used in the following procedures .
For UEs at initial access stage, the dedicated signals are not available yet. Thus it is desired that UE may receive the indication as early as possible by other means. By doing this, any new DL signal pattern or procedure under the energy saving mode can be known
to UE as early as possible. Then UE takes corresponding actions and avoids possible confusion between active mode and energy saving mode. Options for realizing such indications are discussed referring to figure 6 below.
When the determined low load period ends the same principles may be used for applying and indicating normal operating mode .
The above described method is applied in the net- work side. The UEs must be configured to respond to the behavior described above. The energy saving mode must be first detected. The detection may be based to the indication sent by the base station. If such indication is not available, UE may follow the pattern that is being sent and to determine the mode based on the pattern. After detecting the correct energy saving mode UE will apply the energy saving mode .
A practical energy saving mode is to apply the same legacy broadcast signals, namely PSS/SSS/MIB, with reduced density. This kind of design causes the least implementation impact as the sequence detection can be reused. The reduced density of the broadcast signal may result in longer time required to complete the detection procedure. Thus relaxed requirement may be needed to allow UE to detect the broadcast signals under both normal and energy saving mode .
Figures 3 - 5 disclose examples of different possible patterns. In the patterns A denotes first secondary synchronization signal (SSS1) , B denotes second secondary synchronization signal (SSS2) and C denotes primary synchronization signal (PSS) . In figures 4 and 5 D denotes master information block (MIB) . In figure
4 E denotes muted master information block. In figure
5 PDCH denotes physical discovery channel. In the fig- ures seven different energy saving modes are disclosed.
A person skilled in the art is able follow the principles of the examples in order provide different pat-
terns for energy saving modes. Thus, the invention is not limited to the examples of figures 3 - 5 but can be modified within the inventive idea of the present invention.
Figure 3 discloses examples of PSS/SSS broadcast patterns. One option in this case is to increase the PSS/SSS periodicity to 10ms (or higher) from 5ms. UE has no prior information of this reduction at the initial access stage and thus assumes the periodicity is always 5ms. Consequentially, UE will fail at the position where PSS/SSS is not transmitted and thus requires a longer time to finish the PSS/SSS detection. On the other hand, UE at hand over stage may know the target cell's energy saving mode by receiving the con- trol information from the serving cell. Then UE knows the density reduction and takes corresponding actions, such as using a longer sliding window to search for PSS/SSS. Several examples are given in the figure to show the reduced densities of PSS/SSS. The PSS/SSS density in legacy system is shown at the top, which may be used in non-energy saving mode or light energy saving mode. In energy saving mode 1&2 , the periodicity is increased to 10ms and one of the SSS sequences is muted. In this case, one bit control is obtained by using different SSS sequences, which may be used for control purposes. In energy saving mode 3, the periodicity is increased to 15ms to achieve a further reduced density. Note there may be other options not shown in the graph.
Figure 4 discloses examples density of MIB in
PSS/SSS patterns. The MIB density may be reduced in the energy saving mode as well to save power. The density reduction may be linked to or independent of the PSS/SSS density.
One option is to increase the MIB periodicity to
20ms (or higher) from 10ms. However, as UE applies the 10ms periodicity of MIB for soft combining, UE must
know this higher periodicity beforehand to avoid false combining. Indication of the energy saving mode must be provided by PSS/SSS. Then UE may use 20ms sliding window instead of 10ms for soft combining MIB after detect the indication.
Another option is to mute a 40ms MIB transmission periodically. In this way, the soft combining will not be impacted when the MIB is not muted. At the muted positions, UE will fail and try the next slot. In this case, the indication of the energy saving mode in PSS/SSS may help the UE aware of the muted position beforehand if proper reference can be provided by PSS/SSS. Several examples are given in in the figure to show the reduced density of MIB with some joint PSS/SSS pattern design. The legacy Long Term Evolution pattern is shown at the top. Energy saving modes 4 and 5 are examples for 20ms MIB periodicity with legacy 5ms PSS/SSS periodicity and 10ms PSS/SSS periodicity respectively. The indication must be provided by every PSS/SSS pair to allow UE distinguish this long periodicity from the normal one. Energy saving mode 6 shows an example of muted MIB transmission with a specific PSS/SSS pattern. Two SSS sequences are used to indicate whether the MIB is present (presence only after SSS sequence 1) . After knowing the energy saving mode by the PSS/SSS pair, UE knows if there is a MIB transmission incoming.
Figure 5 discloses an example of new broadcast signal. If a new broadcast signal is allowed for en- ergy saving mode, it could provide better power efficiency than the legacy broadcast signals while the performance could be sustained. The Physical Discovery Channel (PDCH) may be a good choice in this case due to its power saving features. The long periodicity en- ables eNB to turn on the PA after a long period and the dense resource of each PDCH shot guarantees the detection performance. The UE at initial access stage
blindly searches for PDCH and legacy PSS/SSS at the same time. If the PDCH detection succeeds then UE knows the eNB is in sleep or vice versa.
Figure 6 discloses examples of a PSS/SSS sequences for indicating energy saving mode. In figure 6 blocks 1 - 5 in ordinary transmissions. Block P illustrates PSS and block S illustrates SSS . One option to realize indication of an energy saving mode is based on the PSS/SSS. In this way the UE at the initial access stage knows the energy saving mode after detecting the PSS/SSS. The indication could be based on new PSS/SSS sequences, which can be separated from the legacy sequences. Another alternative is to introduce a new relative position of PSS/SSS pair to indicate the en- ergy saving mode. A different CP length or swapped PSS/SSS pair could be introduced here without requiring new sequences. UE blindly detects this relative position and knows if the base station is in an energy saving mode.
A further option is to include the energy saving mode indication in the MIB or system information blocks (SIB) . UE knows the mode after detecting the PSS/SSS and this system information. The indication in this way is more robust due to the CRC check. However, this causes restrictions on the MIB and SIB transmission under the sleeping mode. They must be transmitted in the legacy way to avoid confusion to UE.
The above mentioned method may be implemented as computer software which is executed in a network ele- ment, such as the network element disclosed above. When the software is executed in a computing device it is configured to perform the above described inventive method in order to facilitate discovery resources in a mobile communication network. The software is embodied on a computer readable medium so that it can be provided to the computing device.
As stated above, the components of the exemplary embodiments can include computer readable medium or memories for holding instructions programmed according to the teachings of the present inventions and for holding data structures, tables, records, and/or other data described herein. Computer readable medium can include any suitable medium that participates in providing instructions to a processor for execution. Such a medium can take many forms, including but not lim- ited to, non-volatile media, volatile media, transmission media, and the like. Non-volatile media can include, for example, optical or magnetic disks, magneto-optical disks, and the like. Volatile media can include dynamic memories, and the like. Transmission media can include coaxial cables, copper wire, fiber optics, and the like. Transmission media also can take the form of acoustic, optical, electromagnetic waves, and the like, such as those generated during radio frequency (RF) communications, infrared (IR) data com- munications, and the like. Common forms of computer- readable media can include, for example, a floppy disk, a flexible disk, hard disk, magnetic tape, any other suitable magnetic medium, a CD-ROM, CD±R, CD+RW, DVD, DVD-RAM, DVD+RW, DVD+R, HD DVD, HD DVD-R, HD DVD-R , HD DVD-RAM, Blu-ray Disc, any other suitable optical medium, a RAM, a PROM, an EPROM, a FLASH-EPROM, any other suitable memory chip or cartridge, a carrier wave or any other suitable medium from which a computer can read.
It is obvious to a person skilled in the art that with the advancement of technology, the basic idea of the invention may be implemented in various ways. The invention and its embodiments are thus not limited to the examples described above; instead they may vary within the scope of the claims.
Claims
1. A method for switching a radio network element into an energy saving mode comprising:
determining the load of a cell; and
as a response to the determined load of the cell the method further comprises :
selecting an energy saving mode from a predetermined set of energy saving modes, wherein at least one of the energy saving modes in said predetermined set of energy saving modes comprises transmitting broadcast signals at reduced density
applying said energy saving mode in the cell; indicating said energy saving mode to devices connected to said radio network element.
2. A method according to claim 1, wherein determining the load of a cell by monitoring said cell .
3. A method according to claim 1, wherein determining the load of a cell by statistical analysis.
4. A method according to any of preceding claims 1 - 3, wherein indicating said energy saving mode to devices by separate signaling.
5. A method according to any of preceding claims 1
- 3, wherein indicating implicitly said energy saving mode by using a predetermined pattern in the broadcast
6. A method according to any of preceding claims 1
- 3, wherein indicating said energy saving mode by including an indication in an existing information block
7. A method according to any of preceding claims 1
- 6, wherein the energy saving mode involves a legacy broadcast pattern, wherein the density of transmissions is reduced.
8. A method according to any of preceding claims 1
- 6, wherein the energy saving mode involves a specially designed broadcast signal.
9. A method according to any of the preceding claims 1 - 8, wherein said network element is operating in an Long Term Evolution network.
10. A method according to any of preceding claims 1 - 8, wherein said network element is operating in an Long Term Evolution Advanced network.
11. A network element comprising:
a network communication configured to communicate with terminal devices in a mobile communication network;
a processor configured to execute program code; and
a memory for storing data,
wherein the network element is configured to:
determine the load of a cell in said mobile communication network; and
as a response to the determined load of the cell the network element is further configured to:
select an energy saving mode from a predetermined set of energy saving modes, wherein at least one of the energy saving modes in said predetermined set of energy saving modes comprises transmitting broadcast signals at reduced density
apply said energy saving mode in the cell;
indicate said energy saving mode to devices connected to said network element.
12. A network element according to claim 11, wherein the network element is further configured to determine the load of a cell by monitoring said cell.
13. A network element according to claim 1, wherein the network element is further configured to determine the load of a cell by statistical analysis.
1 . A network element according to any of preceding claims 11 - 13, wherein the network element is further configured to indicate said energy saving mode to devices by separate signaling.
15. A network element according to any of preced- ing claims 11 - 13, wherein the network element is further configured to indicate implicitly said energy
saving mode by using a predetermined pattern in the broadcast .
16. A network element according to any of preceding claims 11 - 13, wherein the network element is further configured to indicate said energy saving mode by including an indication in an existing information block .
17. A network element according to any of preceding claims 11 - 16, wherein the energy saving mode in- volves a legacy broadcast pattern, wherein the density of transmissions is reduced.
18. A network element according to any of preceding claims 11 - 16, wherein the energy saving mode involves a specially designed broadcast signal.
19. A network element according to any of preceding claims 11 - 18, wherein said network element is operating in an Long Term Evolution network.
20. A network element according to any of preceding claims 11 - 19, wherein said network element is operating in an Long Term Evolution Advanced network.
21. A computer program comprising code adapted to cause the following when executed on a data-processing system:
determining the load of a cell; and
as a response to the determined load of the cell the method further comprises:
selecting an energy saving mode from a predetermined set of energy saving modes, wherein at least one of the energy saving modes in said predetermined set of energy saving modes comprises transmitting broadcast signals at reduced density
applying said energy saving mode in the cell; indicating said energy saving mode to devices connected to said radio network element.
22. A computer program according to claim 21, wherein determining the load of a cell by monitoring said cell.
23. A computer program according to claim 21, wherein determining the load of a cell by statistical analysis .
24. A computer program according to any of claims 21 - 23, wherein indicating said energy saving mode to devices by separate signaling.
25. A computer program according to any of claims 21 - 23, wherein indicating implicitly said energy saving mode by using a predetermined pattern in the broadcast.
26. A computer program according to any of claims 21 - 23, wherein indicating said energy saving mode by including an indication in an existing information block.
27. A computer program according to any of claims
21 - 26, wherein the energy saving mode involves a legacy broadcast pattern, wherein the density of transmissions is reduced.
28. A computer program according to any of claims 21 - 26, wherein the energy saving mode involves a specially designed broadcast signal.
29. A computer program according to any of claims 21 - 28, wherein said cell is a cell of an Long Term Evolution network.
30. A computer program according to any of claims
21 - 28, wherein said cell is a cell of an Long Term Evolution Advanced network.
31. A method according to any of preceding claims 21 - 28, wherein said network element is operating in an Long Term Evolution Advanced network.
32. A computer program according to any of preceding claims 21 - 31, wherein said computer program is stored on a computer readable medium.
33. An apparatus comprising:
A network communication configured to communicate with a mobile communication network;
A processor configured to execute program code; and
A memory for storing data,
wherein the apparatus is configured to receive an indication of an energy saving mode from a base station and to apply the indicated energy saving mode in the communication.
34. An apparatus according to claim 33, wherein the apparatus is configured to receive said indication implicitly in a form of predetermined broadcast pattern.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2012/080981 WO2014036692A1 (en) | 2012-09-04 | 2012-09-04 | Energy saving mode management for a network element |
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| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2012/080981 WO2014036692A1 (en) | 2012-09-04 | 2012-09-04 | Energy saving mode management for a network element |
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| WO2017069668A1 (en) * | 2015-10-21 | 2017-04-27 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods, network nodes and wireless device for handling access information |
| WO2017069669A1 (en) * | 2015-10-21 | 2017-04-27 | Telefonaktiebolaget Lm Ericsson (Publ) | Optimized broadcasting of system information messages |
| CN107925942A (en) * | 2015-08-14 | 2018-04-17 | 瑞典爱立信有限公司 | The distribution of system access information in wireless communication system |
| US10701620B2 (en) | 2015-03-10 | 2020-06-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods, network node and wireless device for handling access information |
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| CN113163516A (en) * | 2020-01-22 | 2021-07-23 | 大唐移动通信设备有限公司 | Signal transmission method and device |
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| WO2023121059A1 (en) * | 2021-12-24 | 2023-06-29 | 삼성전자 주식회사 | Method and device for reducing base station energy consumption in wireless communication system |
| WO2024029846A1 (en) * | 2022-08-02 | 2024-02-08 | Samsung Electronics Co., Ltd. | Method and apparatus for indicating energy saving mode of base station in wireless communication system |
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