WO2024231563A1

WO2024231563A1 - Enhanced cell dtx/drx

Info

Publication number: WO2024231563A1
Application number: PCT/EP2024/062987
Authority: WO
Inventors: Gustavo Wagner Oliveira Da Costa; Geordie George; Nazanin VATANIAN; Elke Roth-Mandutz
Original assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
Priority date: 2023-05-11
Filing date: 2024-05-10
Publication date: 2024-11-14

Abstract

Embodiment provide a first transceiver of a wireless communication network, wherein the first transceiver is configured to operate in a cell discontinuous transmission, DTX, activated mode in which a cell discontinuous transmission, DTX, configuration is activated, wherein the first transceiver is configured to switch, in response to a reception of a control information indicating a bypass of the activated cell discontinuous transmission, DTX, configuration, into a cell discontinuous transmission, DTX, bypass mode for a limited time period in which cell discontinuous transmission, DTX, restrictions do not apply.

Description

Enhanced Cell DTX/DRX

Description

Embodiments of the present application relate to the field of wireless communication, and more specifically, to network energy saving related configurations. Some embodiments relate to enhanced cell discontinuous transmission, DTX / cell discontinuous reception, DRX.

Fig. 1 is a schematic representation of an example of a terrestrial wireless network 100 including, as is shown in Fig. 1 (a), a core network 102 and one or more radio access networks (RANs) RAN1 , RAN2, ... RANN. Fig. 1(b) is a schematic representation of an example of a radio access network RANn that may include one or more base stations (BSs) gNB1 to gNB5, each serving a specific area surrounding the base station schematically represented by respective cells 1061 to 1065. The base stations are provided to serve users within a cell. The term base station, BS, refers to a next generation node B (gNB) in 5G networks, an evolved node B (eNB) in UMTS/LTE/LTE-A/ LTE-A Pro, or just a BS in other mobile communication standards. A user may be a stationary device or a mobile device. The wireless communication system may also be accessed by mobile or stationary Internet of Things (loT) devices which connect to a base station or to a user. The mobile devices or the loT devices may include physical devices, ground based vehicles, such as robots or cars, aerial vehicles, such as manned or unmanned aerial vehicles (UAVs), the latter also referred to as drones, buildings and other items or devices having embedded therein electronics, software, sensors, actuators, or the like as well as network connectivity that enables these devices to collect and exchange data across an existing network infrastructure. Fig. 1(b) shows an exemplary view of five cells, however, the RANn may include more or less such cells, and RANn may also include only one base station. Fig. 1(b) shows two users UE1 and UE2, also referred to as user equipment, UE, that are in cell 1062 and that are served by base station gNB2. Another user UE3 is shown in cell 1064 which is served by base station gNB4. The arrows 1081 , 1082 and 1083 schematically represent uplink/downlink connections for transmitting data from a user UE1 , UE2 and UE3 to the base stations gNB2, gNB4 or for transmitting data from the base stations gNB2, gNB4 to the users UE1 , UE2, UE3. Further, Fig. 1 (b) shows two loT devices 1101 and 1102 in cell 1064, which may be stationary or mobile devices. The loT device 1101 accesses the wireless communication system via the base station gNB4 to receive and transmit data as schematically represented by arrow 1121. The loT device 1102 accesses the wireless communication system via the user UE3 as is schematically represented by arrow 1122. The respective base station gNB1 to gNB5 may be connected to the core network 102, e.g., via the S1 interface, via respective backhaul links 1141 to 1145, which are schematically represented in Fig. 1(b) by the arrows pointing to “core”. The core network 102 may be connected to one or more external networks. Further, some or all of the respective base station gNB1 to gNB5 may connected, e.g., via the S1 or X2 interface or the XN interface in NR, with each other via respective backhaul links 1161 to 1165, which are schematically represented in Fig. 1 (b) by the arrows pointing to “gNBs”.

For data transmission a physical resource grid may be used. The physical resource grid may comprise a set of resource elements (REs) to which various physical channels and physical signals are mapped. For example, the physical channels may include the physical downlink, uplink and sidelink shared channels (PDSCH, PLISCH, PSSCH) carrying user specific data, also referred to as downlink, uplink and sidelink payload data, the physical broadcast channel (PBCH) carrying for example a master information block (MIB), the physical downlink shared channel (PDSCH) carrying for example a system information block (SIB), the physical downlink, uplink and sidelink control channels (PDCCH, PLICCH, PSSCH) carrying for example the downlink control information (DCI), the uplink control information (UCI) and the sidelink control information (SCI). For the uplink, the physical channels, or more precisely the transport channels according to 3GPP, may further include the physical random access channel (PRACH or RACH) used by UEs for accessing the network once a UE is synchronized and has obtained the MIB and SIB. The physical signals may comprise reference signals or symbols (RS), synchronization signals and the like. The resource grid may comprise a frame or radio frame having a certain duration in the time domain and having a given bandwidth in the frequency domain. The frame may have a certain number of subframes of a predefined length, e.g., 1 ms. Each subframe may include one or more slots of 12 or 14 orthogonal frequency-division multiplexing (OFDM) symbols depending on the cyclic prefix (CP) length. All OFDM symbols may be used for downlink (DL) or uplink (UL) or only a subset, e.g., when utilizing shortened transmission time intervals (sTTI) or a mini-slot/non-slot-based frame structure comprising just a few OFDM symbols.

The wireless communication system may be any single-tone or multicarrier system using frequency-division multiplexing, like the OFDM system, the orthogonal frequency-division multiple access (OFDMA) system, or any other IFFT-based signal with or without CP, e.g., DFT-s-OFDM. Other waveforms, like non-orthogonal waveforms for multiple access, e.g., filter-bank multicarrier (FBMC), generalized frequency division multiplexing (GFDM) or universal filtered multi carrier (LIFMC), may be used. The wireless communication system may operate, e.g., in accordance with the LTE-Advanced pro standard or the NR (5G), New Radio, standard.

The wireless network or communication system depicted in Fig. 1 may by a heterogeneous network having distinct overlaid networks, e.g., a network of macro cells with each macro cell including a macro base station, like base station gNB1 to gNB5, and a network of small cell base stations (not shown in Fig. 1), like femto or pico base stations.

In addition to the above described terrestrial wireless network also non-terrestrial wireless communication networks exist including spaceborne transceivers, like satellites, and/or airborne transceivers, like unmanned aircraft systems. The non-terrestrial wireless communication network or system may operate in a similar way as the terrestrial system described above with reference to Fig. 1 , for example in accordance with the LTE-Advanced Pro standard or the NR (5G), new radio, standard.

In mobile communication networks, for example in a network like that described above with reference to Fig. 1 , like an LTE or 5G/NR network, there may be UEs that communicate directly with each other over one or more sidelink (SL) channels, e.g., using the PC5 interface. UEs that communicate directly with each other over the sidelink may include vehicles communicating directly with other vehicles (V2V communication), vehicles communicating with other entities of the wireless communication network (V2X communication), for example roadside entities, like traffic lights, traffic signs, or pedestrians. Other UEs may not be vehicular related UEs and may comprise any of the above-mentioned devices. Such devices may also communicate directly with each other (D2D communication) using the SL channels.

When considering two UEs directly communicating with each other over the sidelink, both UEs may be served by the same base station so that the base station may provide sidelink resource allocation configuration or assistance for the UEs. For example, both UEs may be within the coverage area of a base station, like one of the base stations depicted in Fig. 1 . This is referred to as an “in-coverage” scenario. Another scenario is referred to as an “out-of-coverage” scenario. It is noted that “out-of-coverage” does not mean that the two UEs are not within one of the cells depicted in Fig. 1 , rather, it means that these UEs may not be connected to a base station, for example, they are not in a radio resource control (RRC) connected state, so that the UEs do not receive from the base station any sidelink resource allocation configuration or assistance, and/or may be connected to the base station, but, for one or more reasons, the base station may not provide sidelink resource allocation configuration or assistance for the UEs, and/or may be connected to the base station that may not support NR V2X services, e.g., GSM, UMTS, LTE base stations.

When considering two UEs directly communicating with each other over the sidelink, e.g., using the PC5 interface, one of the UEs may also be connected with a BS, and may relay information from the BS to the other UE via the sidelink interface. The relaying may be performed in the same frequency band (in-band-relay) or another frequency band (out-of-band relay) may be used. In the first case, communication on the Uu and on the sidelink may be decoupled using different time slots as in time division duplex (TDD) systems.

Fig. 2 is a schematic representation of an in-coverage scenario in which two UEs directly communicating with each other are both connected to a base station. The base station gNB has a coverage area that is schematically represented by the circle 200 which, basically, corresponds to the cell schematically represented in Fig. 1. The UEs directly communicating with each other include a first vehicle 202 and a second vehicle 204 both in the coverage area 200 of the base station gNB. Both vehicles 202, 204 are connected to the base station gNB and, in addition, they are connected directly with each other over the PC5 interface. The scheduling and/or interference management of the V2V traffic is assisted by the gNB via control signaling over the Uu interface, which is the radio interface between the base station and the UEs. In other words, the gNB provides SL resource allocation configuration or assistance for the UEs, and the gNB assigns the resources to be used for the V2V communication over the sidelink. This configuration is also referred to as a mode 1 configuration in NR V2X or as a mode 3 configuration in LTE V2X.

Fig. 3 is a schematic representation of an out-of-coverage scenario in which the UEs directly communicating with each other are either not connected to a base station, although they may be physically within a cell of a wireless communication network, or some or all of the UEs directly communicating with each other are to a base station but the base station does not provide for the SL resource allocation configuration or assistance. Three vehicles 206, 208 and 210 are shown directly communicating with each other over a sidelink, e.g., using the PC5 interface. The scheduling and/or interference management of the V2V traffic is based on algorithms implemented between the vehicles. This configuration is also referred to as a mode 2 configuration in NR V2X or as a mode 4 configuration in LTE V2X. As mentioned above, the scenario in Fig. 3 which is the out-of-coverage scenario does not necessarily mean that the respective mode 2 UEs (in NR) or mode 4 UEs (in LTE) are outside of the coverage 200 of a base station, rather, it means that the respective mode 2 UEs (in NR) or mode 4 UEs (in LTE) are not served by a base station, are not connected to the base station of the coverage area, or are connected to the base station but receive no SL resource allocation configuration or assistance from the base station. Thus, there may be situations in which, within the coverage area 200 shown in Fig. 2, in addition to the NR mode 1 or LTE mode 3 UEs 202, 204 also NR mode 2 or LTE mode 4 UEs 206, 208, 210 are present.

Naturally, it is also possible that the first vehicle 202 is covered by the gNB, i.e. connected with Uu to the gNB, wherein the second vehicle 204 is not covered by the gNB and only connected via the PC5 interface to the first vehicle 202, or that the second vehicle is connected via the PC5 interface to the first vehicle 202 but via Uu to another gNB, as will become clear from the discussion of Figs. 4 and 5.

Fig. 4 is a schematic representation of a scenario in which two UEs directly communicating with each, wherein only one of the two UEs is connected to a base station. The base station gNB has a coverage area that is schematically represented by the circle 200 which, basically, corresponds to the cell schematically represented in Fig. 1. The UEs directly communicating with each other include a first vehicle 202 and a second vehicle 204, wherein only the first vehicle 202 is in the coverage area 200 of the base station gNB. Both vehicles 202, 204 are connected directly with each other over the PC5 interface.

Fig. 5 is a schematic representation of a scenario in which two UEs directly communicating with each, wherein the two UEs are connected to different base stations. The first base station gNB1 has a coverage area that is schematically represented by the first circle 2001 , wherein the second station gNB2 has a coverage area that is schematically represented by the second circle 2002. The UEs directly communicating with each other include a first vehicle 202 and a second vehicle 204, wherein the first vehicle 202 is in the coverage area 2001 of the first base station gNB1 and connected to the first base station gNB1 via the Uu interface, wherein the second vehicle 204 is in the coverage area 2002 of the second base station gNB2 and connected to the second base station gNB2 via the Uu interface.

After the study in TR 38.864, Cell DTX has been selected for standardization as an approach to save network energy.

As described in TR 38.864, when Cell DTX is configured a cycle will be followed. Such cycle is divided into an active period (referred by some as Cell DTX ON period) and a non-active period (also referred by some as Cell DTX OFF period). During the non-active period some strong restrictions apply to the gNB transmission on that cell. The Cell DTX periodic configuration is explicitly signaled to the UEs and include at least the period, on duration and a start offset. The configuration is activated when configured via RRC and de-activated when the RRC configuration is removed. Note that the used nomenclature on Cell DTX uses similar names to different concepts. In Cell DTX context, activated does not have the same meaning as “active”, “activated” means a cell DTX configuration is present and is applicable, “active” means that the cell is on the period where no Cell DTX restrictions are applicable. Accordingly, “non-active” represents a period on the Cell DTX cycle where gNB transmissions are restricted and to “de-activate” is making the Cell DTX cycle not applicable anymore. This is achieved by removing the configuration. In other words, the cell resumes a regular operation. For sake of clarity, the legacy Cell DTX operation and the related concepts and parameters are illustrated in Fig. 6. Specifically, Fig. 6 shows in a schematic representation a basic description of Cell DTX operation and parameters. Thereby, in Fig. 6 the abscissa denotes the time. As indicated in Fig. 6, when Cell DTX is activated, transmissions are only allowed during active periods 120_1 -120_5, where transmissions are not allowed during inactive periods 122_1-122_7. The length of each of the active periods 120_1-120_5 is called Cell DTX On duration 124 and the periodicity of the active periods 120_1-120_5 is called Cell DTX period 126. Furthermore, in Fig. 6 also a Cell DTX activation delay 128 and deactivation delay 130 are shown. In contrast to that, when Cell DTX is deactivated, e.g., when regular operation is resumed, transmissions are always possible as indicated in Fig. 6 by blocks indicated with reference numeral 140.

Conventional Cell DTX approaches consider that Cell DTX will be de-activated when a traffic burst arrives at the gNB. There are several issues with this approach. First and foremost, the de-activation may take time to come into effect. For example, if RRC signaling is used for deactivation it may take around 20 ms to take into effect. This will inevitably cause further delay on serving the UEs. Second, the signaling overhead of de-activating can be significant. At last, but not least, when Cell DTX is de-activated then the gNB has to activate it again if it wants to save energy again. Thus, after serving the traffic burst the gNB will again spend a lot of signaling and time de-activating and re-activating Cell DTX before energy savings are possible.

An enhancement to the described approach of de-activating Cell DTX when traffic arises, is the addition of lower layer signaling. This is illustrated in Fig. 7. Specifically, Fig. 7 shows in a schematic representation that lower layer signaling allows for reduced delay in activation and de-activation of cell DTX. This reduces the activation delay and de-activation delay, but it raises some issues regarding overhead of signaling and reliability of the signaling. Furthermore, the transition back from regular operation to Cell DTX may entail some extra delay, e.g. the delay to measure load and take a decision to re-activate Cell DTX. Thereby, in Fig. 7 the abscissa denotes the time. Similar to Fig. 6, in Fig. 7 Cell DTX active periods 120_1-120_6 and Cell DTX inactive periods 122_1-122_6 are shown, where the Cell DTX activation delay 128 and deactivation delay 130 is reduced when compared to Fig. 6.

Other conventional approach is to rely on UE C-DRX inactivity timer to address an incoming traffic buffer. However, this approach is ruled out by a Rel-18 agreement in RAN2 that the UE does not monitor PDCCH during Cell DTX non-active time, even if the UE is on C-DRX active time.

Similarly, a Cell inactivity timer may be introduced to handle bursts of traffic but this may increase largely the complexity of Cell DTX as all UEs would need to keep track of whether the cell is active or not. Also, a cell inactivity timer would increase energy consumption in both the gNB and UE.

The operation described above is also mostly valid for Cell DRX, the difference being that in that case restrictions apply to gNB reception instead of transmission.

However, Cell DTX as is being currently standardized is significantly increasing the delay. Not all this delay is necessary or acceptable. When Cell DTX is activated, the total transmission time is increasing because of the imposed restrictions. No mechanism for handling traffic bursts has been defined. Symbols with SSBs must be transmitted anyway. The increased delay may be unacceptable for emergency calls.

Therefore, there is the need for improvements or enhancements with respect to the delay in a cell with activated DTX / DRX, especially for critical for emergency calls or sudden traffic (traffic bursts).

It is noted that the information in the above section is only for enhancing the understanding of the background of the invention and therefore it may contain information that does not form prior art and is already known to a person of ordinary skill in the art.

Embodiments of the present invention are described herein making reference to the appended drawings.

Fig. 1 shows a schematic representation of an example of a wireless communication system; Fig. 2 is a schematic representation of an in-coverage scenario in which UEs directly communicating with each other are connected to a base station;

Fig. 3 is a schematic representation of an out-of-coverage scenario in which UEs directly communicating with each other receive no SL resource allocation configuration or assistance from a base station;

Fig. 4 is a schematic representation of a partial out-of-coverage scenario in which some of the UEs directly communicating with each other receive no SL resource allocation configuration or assistance from a base station;

Fig. 5 is a schematic representation of an in-coverage scenario in which UEs directly communicating with each other are connected to different base stations;

Fig. 6 shows in a schematic representation a basic description of Cell DTX operation and parameters,

Fig. 7 shows in a schematic representation that lower layer signaling allows for reduced delay in activation and de-activation of cell DTX,

Fig. 8 is a schematic representation of a wireless communication system comprising a transceiver, like a base station or a relay, and a plurality of communication devices, like UEs, according to an embodiment;

Fig. 9 shows a schematic representation of an operation of Enhanced Cell DTX with a CDBI (Cell DTX Bypass Indication), where the active period is dynamically extended (non-active period shortened) and Cell DTX continues on a regular basis after the traffic burst is fully served,

Fig. 10 shows a schematic representation of an embodiment where CDBI is used to extend the active duration (not necessarily over the whole period),

Fig. 11 shows a schematic representation of an embodiment with alternative signaling,

Fig. 12 shows in a schematic representation that a configuration may be changed to serve the traffic in Cell DTX, Fig. 13 shows in a schematic representation that the cell can be activated using a C- WUS to serve the traffic in Cell DTX,

Fig. 14 shows in a schematic representation that CDBI may also be used to bypass Cell DRX, and

Fig. 15 illustrates an example of a computer system on which units or modules as well as the steps of the methods described in accordance with the inventive approach may execute.

Equal or equivalent elements or elements with equal or equivalent functionality are denoted in the following description by equal or equivalent reference numerals.

In the following description, a plurality of details are set forth to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to one skilled in the art that embodiments of the present invention may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form rather than in detail in order to avoid obscuring embodiments of the present invention. In addition, features of the different embodiments described hereinafter may be combined with each other, unless specifically noted otherwise.

As mentioned above, Cell DTX has been selected for standardization as an approach to save network energy. However, Cell DTX can impact the delay of the serving traffic. Due to the restrictions which apply during Cell DTX this delay is especially critical for emergency calls or sudden traffic (traffic bursts). In these cases, a gNB with Cell DTX activated will not answer quickly enough to the new demand.

Subsequently described embodiments, solves the delay issue on Cell DTX while keeping its energy saving characteristics. Therefore, this “Enhanced Cell DTX” approach can make Cell DTX more practical as QoS is not affected in the same way as conventional Cell DTX. Embodiments are also applicable to Cell DRX.

Embodiments of the present invention may be implemented in a wireless communication system or network as depicted in Figs. 1 to 5 including a transceiver, like a base station, gNB, or relay, and a plurality of communication devices, like user equipment’s, UEs. Fig. 8 is a schematic representation of a wireless communication system comprising a transceiver 200, like a base station, and a plurality of communication devices 202i to 202_n, like UEs. The UEs might communicated directly with each other via a wireless communication link or channel 203, like a radio link (e.g., using the PC5 interface (sidelink)). Further, the transceiver and the UEs 202 might communicate via a wireless communication link or channel 204, like a radio link (e.g., using the uU interface). The transceiver 200 might include one or more antennas ANT or an antenna array having a plurality of antenna elements, a signal processor 200a and a transceiver unit 200b. The UEs 202 might include one or more antennas ANT or an antenna array having a plurality of antennas, a processor 202ai to 202a_n, and a transceiver (e.g., receiver and/or transmitter) unit 202bi to 202b_n. The base station 200 and/or the one or more UEs 202 may operate in accordance with the inventive teachings described herein.

Embodiments provide a first transceiver [e.g., UE] of a wireless communication network [e.g., 5G I NR], wherein the first transceiver is configured to operate in a cell discontinuous transmission, DTX, activated mode in which a cell discontinuous transmission, DTX, configuration is activated, wherein the first transceiver is configured to switch, in response to a reception of a control information [e.g., CDBI, cell DTX bypass indication] indicating a bypass of the activated cell discontinuous transmission, DTX, configuration, into a cell discontinuous transmission, DTX, bypass mode [e.g., only] for [or during] a limited time period in which cell discontinuous transmission, DTX, restrictions [e.g., according to the cell discontinuous transmission, DTX, configuration] do not apply [e.g., are not applicable].

In embodiments, the cell discontinuous transmission, DTX, restrictions are bypassed by: a temporary deactivation of the cell discontinuous transmission, DTX, configuration or an extension of an active period of a cell discontinuous transmission, DTX, cycle, or a modification of at least one cell discontinuous transmission, DTX, parameter [e.g., of the cell discontinuous transmission, DTX, configuration].

Embodiments provide a first transceiver [e.g., UE] of a wireless communication network [e.g., 5G I NR], wherein the first transceiver is configured to operate in a cell discontinuous transmission, DTX, mode in which a cell discontinuous transmission, DTX, configuration is activated, wherein the first transceiver is configured to switch, in response to a reception of a control information [e.g., CDBI, cell DTX bybass indication] indicating a bypass of the activated cell discontinuous transmission, DTX, configuration, into a cell discontinuous transmission, DTX, bypass mode [e.g., only] for [or during] a limited time period in which the cell discontinuous transmission, DTX, configuration is deactivated or an active period of a cell discontinuous transmission, DTX, cycle is extended, or at least one at least one cell discontinuous transmission, DTX, parameter [e.g., of the cell discontinuous transmission, DTX, configuration] is modified.

In embodiments, in the cell discontinuous transmission, DTX, activated mode the first transceiver is configured to operate using a cell discontinuous transmission, DTX, cycle according to the cell discontinuous transmission, DTX, configuration.

In embodiments, the first transceiver is configured to switch into the cell discontinuous transmission, DTX, bypass mode only for the limited time period.

In embodiments, the first transceiver is configured to automatically switch back into the cell discontinuous transmission, DTX, activated mode after the limited time period.

In embodiments, the first transceiver is configured to switch back into the cell discontinuous transmission, DTX, activated mode after the limited time period independent on a reception of a control information [e.g., without signaling].

In embodiments, the first transceiver is configured to receive the control information from a second transceiver [e.g., base station] of the wireless communication network [e.g., 5G I NR],

In embodiments, the control information is a downlink control information, DCI, or a medium access control control element, MAC CE.

In embodiments, the limited time period is pre-determined.

In embodiments, the limited time period is preconfigured,

In embodiments, the control information indicates the limited time period.

In embodiments, the control information indicates the limited time period relative to a cell discontinuous transmission, DTX, period, by means of a time value [e.g., time unit], by means of a number of time slots, by means of a number of frames, and/or relative to a synchronization signal block period, SSB, burst period. In embodiments, the control information is a first control information, wherein the first transceiver is configured to receive a second control information indicating that the limited time period is extended [e.g., by a second limited time period] to an extended limited time period, wherein the first transceiver is configured to stay, in response to the reception of the second control information, in the cell discontinuous transmission, DTX, bypass mode for [or during] the extended limited time period.

In embodiments, the control information further indicates whether a semi-persistent scheduling, SPS, configuration is to be re-activated during the limited time period.

In embodiments, the control information further indicates whether a random access control channel, RACH, configuration is to be re-activated during the limited time period.

In embodiments, the control information further indicates whether a channel state information reference signal, CSI-RS, configuration is to be re-activated during the limited time period.

In embodiments, the control information indicates that re-transmissions are allowed during the limited time period.

In embodiments, the retransmission is a hybrid automatic repeat request, HARQ, retransmission or a radio link control, RLC, retransmission.

In embodiments, the control information comprises a buffer size indication indicating an amount of data to be transmitted, wherein the limited time period is defined by a time period required to fully transmit the amount of indicated data.

In embodiments, an active period of a cell discontinuous transmission, DTX, cycle is subdivided into a first sub-period and a second sub-period, wherein the first sub-period is part of the cell discontinuous transmission, DTX, configuration, wherein the second sub-period is activated in response to the reception of the control information, wherein a length of the second sub-period corresponds [e.g., is equal to] to the limited time period.

In embodiments, the cell discontinuous transmission, DTX, restrictions are bypassed by a modification of at least one cell discontinuous transmission, DTX, parameter, wherein the at least one cell discontinuous transmission, DTX, parameter, is at least one out of a cell discontinuous transmission, DTX, prefix, a cell discontinuous transmission, DTX, period, a cell discontinuous transmission, DTX, on-duration.

In embodiments, the control information is received via L1 and/or L2 signaling.

In embodiments, the first transceiver is configured to transmit a particular [or predefined] random access preamble [e.g., a random access preamble associated with a high priority] to the second transceiver in response to an emergency situation, in order to trigger a bypass of the activated cell discontinuous transmission, DTX, configuration.

In embodiments, when an implicit activation of cell discontinuous transmission, DTX, bypass mode is indicated, the first transceiver is configured, in response to an emergency situation, to transmit a particular [or predefined] random access preamble [e.g., a random access preamble associated with a high priority] to the second transceiver and to automatically switch into the cell discontinuous transmission, DTX, bypass mode for the limited time period.

In embodiments, the implicit activation of cell discontinuous transmission, DTX, bypass mode is indicated by means of one out of broadcast information, a master information block, MIB, a system information block one, SIB-1 , or another system information block.

In embodiments, the implicit activation of cell discontinuous transmission, DTX, bypass mode is pre-defined.

In embodiments, the first transceiver is configured to transmit a particular [or predefined] random access preamble [e.g., a random access preamble associated with a high priority] to the second transceiver as wake-up signal in response to an emergency situation.

In embodiments, the first transceiver is configured to deactivate, in the cell discontinuous transmission, DTX, bypass mode, at least one network energy saving technique that is active in the cell discontinuous transmission, DTX, activated mode.

In embodiments, the at least one network energy saving technique is at least one out of a reduction of a number of available antenna ports or antenna elements, a lowered transmit power, a deactivation of one or more carriers, a deactivation of a bandwidth part.

In embodiments, the first transceiver is configured to reactivate, in the cell discontinuous transmission, DTX, bypass mode, a transmission of channel state information, CSI, reports for the limited time period.

In embodiments, the first transceiver is configured to reactivate, in the cell discontinuous transmission, DTX, bypass mode, a transmission of channel state information reference signals, CSI-RS, for the limited time period.

In embodiments, the control information further indicates a bypass of an activated cell discontinuous reception, DRX, configuration, wherein the first transceiver is configured, in response to the reception of the control information, to switch into a cell discontinuous reception, DRX, bypass mode [e.g., only] for [or during] a limited time period in which cell discontinuous reception, DRX, restrictions [e.g., according to the cell discontinuous reception, DRX, configuration] do not apply [e.g., are not applicable].

In embodiments, the cell discontinuous reception, DRX, restrictions are bypassed by: a temporary deactivation of the cell discontinuous reception, DRX, configuration or an extension of an active period of a cell discontinuous reception, DRX, cycle, or a modification of at least one cell discontinuous reception, DRX, parameter [e.g., of the cell discontinuous reception, DRX, configuration].

Further embodiments provide a first transceiver [e.g., UE] of a wireless communication network [e.g., 5G I NR], wherein the first transceiver is configured to operate in a cell discontinuous reception, DRX, activated mode in which a cell discontinuous reception, DRX, configuration is activated, wherein the first transceiver is configured to transmit a first control information to a second transceiver of the wireless communication network, the first control information indicating a cell discontinuous reception, DTR, bypass request, wherein the first transceiver is configured to switch, in response to a reception of a second control information [e.g., CDBI, cell DRX bypass indication] indicating a bypass of the activated cell discontinuous reception, DRX, configuration, into a cell discontinuous reception, DRX, bypass mode [e.g., only] for [or during] a limited time period in which cell discontinuous reception, DRX, restrictions [e.g., according to the cell discontinuous reception, DRX, configuration] do not apply [e.g., are not applicable].

In embodiments, the cell discontinuous reception, DRX, restrictions are bypassed by: a temporary deactivation of the cell discontinuous reception, DRX, configuration or an extension of an active period of a cell discontinuous reception, DRX, cycle. or a modification of at least one cell discontinuous reception, DRX, parameter [e.g., of the cell discontinuous reception, DRX, configuration].

In embodiments, in the cell discontinuous reception, DRX, activated mode the first transceiver is configured to operate using a cell discontinuous reception, DRX, cycle according to the cell discontinuous reception, DRX, configuration.

In embodiments, the first transceiver is configured to transmit the first control information in response to an arrival of uplink traffic [e.g., comprising a priority above a threshold].

In embodiments, the first control signal is a wake-up signal, a random access request, a scheduling request, a buffer status report.

In embodiments, the second control information further indicates whether a random access control channel, RACH, configuration is to be re-activated during the limited time period.

In embodiments, the second control information further indicates whether a configured grant, CG, configuration is to be re-activated during the limited time period.

In embodiments, the second control information further indicates whether a sounding reference signal, SRS, configuration is to be re-activated during the limited time period.

In embodiments, the second control information further indicates whether a scheduling request, SR, configuration is to be re-activated during the limited time period.

In embodiments, the second control information further indicates whether a channel state information, CSI, report configuration is to be re-activated during the limited time period.

Further embodiments provide a first transceiver [e.g., UE] of a wireless communication network [e.g., 5G I NR], wherein the first transceiver is configured to operate in a cell discontinuous transmission, DRX, and cell discontinuous reception, DRX, activated mode in which a cell discontinuous transmission, DTX, configuration and a cell discontinuous reception, DRX, configuration is activated, wherein the first transceiver is configured to receive a control information from a second transceiver of the wireless communication network, the control information indicating at least one out of a bypass of the activated cell discontinuous transmission, DTX, configuration, a bypass of the activated cell discontinuous reception, DRX, configuration, wherein, in case that the control information indicates a bypass of the activated cell discontinuous transmission, DTX, configuration, the first transceiver is configured to switch into a cell discontinuous transmission, DTX, bypass mode [e.g., only] for [or during] a limited time period in which cell discontinuous transmission, DTX, restrictions [e.g., according to the cell discontinuous transmission, DTX, configuration] do not apply [e.g., are not applicable], wherein, in case that the control information indicates a bypass of the activated cell discontinuous reception, DRX, configuration, the first transceiver is configured to switch into a cell discontinuous reception, DRX, bypass mode [e.g., only] for [or during] a limited time period in which cell discontinuous reception, DRX, restrictions [e.g., according to the cell discontinuous reception, DRX, configuration] do not apply [e.g., are not applicable].

In embodiments, the control information comprises two fields, wherein a first field indicates whether the activated cell discontinuous transmission, DTX, configuration is to be bypassed, and wherein a second field indicates whether the activated cell discontinuous reception, DRX, configuration is to be bypassed.

Further embodiments provide a second transceiver [e.g., base station] of a wireless communication network [e.g., 5G I NR], wherein the second transceiver is configured to operate [e.g., and to serve at least one first transceiver that is operating] in a cell discontinuous transmission, DTX, activated mode in which a cell discontinuous transmission, DTX, configuration is activated, wherein the second transceiver is configured to transmit a control information to the at least one first transceiver, the control information [e.g., CDBI, cell DTX bybass indication] indicating a bypass of the activated cell discontinuous transmission, DTX, configuration, wherein the second transceiver is configured to switch into a cell discontinuous transmission, DTX, bypass mode [e.g., only] for [or during] a limited time period in which cell discontinuous transmission, DTX, restrictions [e.g., according to the cell discontinuous transmission, DTX, configuration] do not apply [e.g., are not applicable].

In embodiments, the cell discontinuous transmission, DTX, restrictions are bypassed by: a temporary deactivation of the cell discontinuous transmission, DTX, configuration, or an extension of an active period of a cell discontinuous transmission, DTX, cycle, or a modification of at least one cell discontinuous transmission, DTX, parameter [e.g., of the cell discontinuous transmission, DTX, configuration].

Further embodiments provide a second transceiver [e.g., base station] of a wireless communication network [e.g., 5G I NR], wherein the second transceiver is configured to serve at least one first transceiver that is operating in a cell discontinuous transmission, DTX, mode in which a cell discontinuous transmission, DTX, configuration is activated, wherein the second transceiver is configured to transmit a control information to the at least one first transceiver, the control information [e.g., CDBI, cell DTX bybass indication] indicating a bypass of the activated cell discontinuous transmission, DTX, configuration, into a cell discontinuous transmission, DTX, bypass mode [e.g., only] for [or during] a limited time period in which the cell discontinuous transmission, DTX, configuration is deactivated or an active period of a cell discontinuous transmission, DTX, cycle is extended, or at least one at least one cell discontinuous transmission, DTX, parameter [e.g., of the cell discontinuous transmission, DTX, configuration] is modified.

In embodiments, in the cell discontinuous transmission, DTX, activated mode the second transceiver is configured to perform transmission according to the discontinuous transmission, DTX, configuration.

In embodiments, the second transceiver is configured to switch into the cell discontinuous transmission, DTX, bypass mode only for the limited time period.

In embodiments, the limited time period is pre-determined.

In embodiments, the limited time period is preconfigured.

In embodiments, the control information indicates the limited time period.

In embodiments, the control information indicates the limited time period relative to a cell discontinuous transmission, DTX, period, by means of a time value [e.g., time unit], by means of a number of time slots, by means of a number of frames, and/or relative to a synchronization signal block period, SSB, burst period.

In embodiments, the control information is a first control information, wherein the second transceiver is configured to transmit a second control information indicating that the limited time period is extended [e.g., by a second limited time period] to an extended limited time period.

In embodiments, the second transceiver is configured to transmit the control information to a plurality of first transceivers.

In embodiments, the second transceiver is configured to transmit the control information to the plurality of first transceivers as group downlink control information, DCI.

In embodiments, an active period of a cell discontinuous transmission, DTX, cycle is subdivided into a first sub-period and a second sub-period, wherein the first sub-period is part of the cell discontinuous transmission, DTX, configuration, wherein the second sub-period is activated in response to the reception of the control information, wherein a length of the second sub-period corresponds [e.g., is equal to] to the limited time period. In embodiments, the cell discontinuous transmission, DTX, restrictions are bypassed by a modification of at least one cell discontinuous transmission, DTX, parameter, wherein the at least one cell discontinuous transmission, DTX, parameter, is at least one out of a cell discontinuous transmission, DTX, prefix, a cell discontinuous transmission, DTX, period, a cell discontinuous transmission, DTX, on-duration.

In embodiments, the second transceiver is configured to transmit the control information via L1 and/or L2 signaling.

In embodiments, the second transceiver is configured to transmit the control information in response to a reception of particular [or predefined] random access preamble [e.g., a random access preamble associated with a high priority] from the first transceiver.

In embodiments, the second transceiver is configured to indicate to the at least one first transceiver an implicit activation of cell discontinuous transmission, DTX, bypass mode, to control the first transceiver to automatically switch, in response to an emergency situation, into the cell discontinuous transmission, DTX, bypass mode for the limited time period.

In embodiments, the second transceiver is configured to indicate the implicit activation of cell discontinuous transmission, DTX, bypass mode to the at least one first transceiver by means of one out of broadcast information, a master information block, MIB, a system information block one, SIB-1 , or another system information block.

In embodiments, the second transceiver is configured to stop a current DTX cycle in response to a reception of a particular [or predefined] random access preamble [e.g., a random access preamble associated with a high priority] as wake-up signal.

In embodiments, the second transceiver is configured to deactivate, in the cell discontinuous transmission, DTX, bypass mode, at least one network energy saving technique that is active in the cell discontinuous transmission, DTX, activated mode. In embodiments, the at least one network energy saving technique is at least one out of a reduction of a number of available antenna ports or antenna elements, a lowered transmit power, a deactivation of one or more carriers, a deactivation of a bandwidth part.

In embodiments, the control information further indicates a bypass of an activated cell discontinuous reception, DRX, configuration, wherein the second transceiver is configured to switch into a cell discontinuous reception, DRX, bypass mode [e.g., only] for [or during] a limited time period in which cell discontinuous reception, DRX, restrictions [e.g., according to the cell discontinuous reception, DRX, configuration] do not apply [e.g., are not applicable].

Further embodiments provide a second transceiver [e.g., base station] of a wireless communication network [e.g., 5G I NR], wherein the second transceiver is configured to operate in a cell discontinuous reception, DRX, activated mode in which a cell discontinuous reception, DRX, configuration is activated, wherein the second transceiver is configured to receive a first control information from a first transceiver of the wireless communication network, the first control information indicating a cell discontinuous reception, DRX, bypass request, wherein the second transceiver is configured to transmit [e.g., in response to a reception of the first control information] a second control information to the first transceiver, the second control information indicating a bypass of the activated cell discontinuous reception, DRX, configuration, wherein the second transceiver is configured to switch into a cell discontinuous reception, DRX, bypass mode [e.g., only] for [or during] a limited time period in which cell discontinuous reception, DRX, restrictions [e.g., according to the cell discontinuous reception, DRX, configuration] do not apply [e.g., are not applicable].

In embodiments, in the cell discontinuous reception, DRX, activated mode the second transceiver is configured to operate using a cell discontinuous reception, DRX, cycle according to the cell discontinuous reception, DRX, configuration.

In embodiments, the first control information is a wake-up signal, a random access request, a scheduling request, a buffer status report.

Further embodiments provide a second transceiver [e.g., base station] of a wireless communication network [e.g., 5G / NR], wherein the first transceiver is configured to operate in a cell discontinuous transmission, DRX, and cell discontinuous reception, DRX, activated mode in which a cell discontinuous transmission, DTX, configuration and a cell discontinuous reception, DRX, configuration is activated, wherein the second transceiver is configured to transmit a control information to at least one first transceiver of the wireless communication network, the control information indicating at least one out of a bypass of the activated cell discontinuous transmission, DTX, configuration, a bypass of the activated cell discontinuous reception, DRX, configuration, wherein, in case that the activated cell discontinuous transmission, DTX, configuration is to be bypassed, the second transceiver is configured to switch into a cell discontinuous transmission, DTX, bypass mode [e.g., only] for [or during] a limited time period in which cell discontinuous transmission, DTX, restrictions [e.g., according to the cell discontinuous transmission, DTX, configuration] do not apply [e.g., are not applicable], wherein, in case that the activated cell discontinuous reception, DRX, configuration is to be bypassed, the second transceiver is configured to switch into a cell discontinuous reception, DRX, bypass mode [e.g., only] for [or during] a limited time period in which cell discontinuous reception, DRX, restrictions [e.g., according to the cell discontinuous reception, DRX, configuration] do not apply [e.g., are not applicable].

Further embodiments provide a method for operating a first transceiver [e.g., UE] of a wireless communication network [e.g., 5G I NR], The method comprises a step of operating the first transceiver in a cell discontinuous transmission, DTX, activated mode in which a cell discontinuous transmission, DTX, configuration is activated. Further, the method comprises a step of switching the first transceiver, in response to a reception of a control information [e.g., CDBI, cell DTX bypass indication] indicating a bypass of the activated cell discontinuous transmission, DTX, configuration, into a cell discontinuous transmission, DTX, bypass mode [e.g., only] for [or during] a limited time period in which cell discontinuous transmission, DTX, restrictions [e.g., according to the cell discontinuous transmission, DTX, configuration] do not apply [e.g., are not applicable].

Further embodiments provide a method for operating a second transceiver [e.g., base station] of a wireless communication network [e.g., 5G / NR], The method comprises a step of operating the second transceiver [e.g., and to serve at least one first transceiver that is operating] in a cell discontinuous transmission, DTX, activated mode in which a cell discontinuous transmission, DTX, configuration is activated. Further, the method comprises a step of transmitting a control information to the at least one first transceiver, the control information [e.g., CDBI, cell DTX bybass indication] indicating a bypass of the activated cell discontinuous transmission, DTX, configuration. Further, the method comprises a step of switching the second transceiver into a cell discontinuous transmission, DTX, bypass mode [e.g., only] for [or during] a limited time period in which cell discontinuous transmission, DTX, restrictions [e.g., according to the cell discontinuous transmission, DTX, configuration] do not apply [e.g., are not applicable].

Further embodiments provide a first transceiver [e.g., UE] of a wireless communication network [e.g., 5G I NR], wherein the first transceiver is configured to operate in a network energy saving mode [e.g., cell DTX, frequency domain network energy saving mode] in which a network energy saving configuration is activated, wherein the first transceiver is configured to switch, in response to a reception of a control information indicating a bypass of the network energy saving configuration, into a network energy saving bypass mode [e.g., only] for [or during] a limited time period in which network energy saving restrictions [e.g., according to the network energy saving configuration] do not apply [e.g., are not applicable].

In embodiments, the network energy saving mode is one out of a cell discontinuous transmission, DTX, activated mode [e.g., in which a cell discontinuous transmission, DTX, configuration is activated], a frequency domain network energy saving mode [e.g., in which at least one carrier or at least one bandwidth part is deactivated/inactive], a spatial domain network energy saving mode, a power domain network energy saving mode.

In embodiments, the control information is a network energy saving mode bypass indication [e.g., CDBI],

In embodiments, the control information indicates an activation of synchronization signal block, SSB, symbols.

Further embodiments provide a second transceiver [e.g., base station] of a wireless communication network [e.g., 5G I NR], wherein the second transceiver is configured to operate [e.g., and to serve at least one first transceiver that is operating] in a network energy saving mode in which a network energy saving configuration is activated, wherein the second transceiver is configured to transmit a control information to the at least one first transceiver, the control information indicating a bypass of the activated network energy saving configuration, wherein the second transceiver is configured to switch into a network energy saving bypass mode [e.g., only] for [or during] a limited time period in which network energy saving restrictions [e.g., according to the network energy saving configuration] do not apply [e.g., are not applicable].

Further embodiments provide a method for operating a first transceiver [e.g., UE] of a wireless communication network [e.g., 5G I NR], The method comprises a step of operating the first transceiver in a network energy saving mode [e.g., cell DTX, frequency domain network energy saving mode] in which a network energy saving configuration is activated. Further, the method comprises a step of switching the first transceiver, in response to a reception of a control information indicating a bypass of the network energy saving configuration, into a network energy saving bypass mode [e.g., only] for [or during] a limited time period in which network energy saving restrictions [e.g., according to the network energy saving configuration] do not apply [e.g., are not applicable].

Further embodiments provide a method for operating a second transceiver [e.g., base station] of a wireless communication network [e.g., 5G I NR], The method comprises a step of operating the second transceiver [e.g., and to serve at least one first transceiver that is operating] in a network energy saving mode in which a network energy saving configuration is activated. Further, the method comprises a step of transmitting a control information to the at least one first transceiver, the control information indicating a bypass of the activated network energy saving configuration. Further, the method comprises a step of switching the second transceiver into a network energy saving bypass mode [e.g., only] for [or during] a limited time period in which network energy saving restrictions [e.g., according to the network energy saving configuration] do not apply [e.g., are not applicable].

Subsequently, embodiments of the present invention are described in further detail.

Thereby, in the following, the description is focusing on Cell DTX, but the same is applicable for Cell DRX. Extensions for Cell DRX are presented in in further detail in section 3 below.

In embodiments, when a gNB decides to schedule a UE on a period which would overlap with the Cell DTX non-active (or off) period, the gNB can send dynamic signaling to a UE indicating that Cell DTX will be temporarily bypassed for a certain period. In essence, this signaling can be used to override the Cell DTX behavior for a limited time. Cell DTX configuration would still be applicable and after the period is elapsed, Cell DTX is automatically applied again according to the configured Cell DTX cycle. In order to keep a short description, this indication to suspend or override the Cell DTX behavior is hereafter refererred as CDBI (Cell DTX Bypass Indication). The operation with a CDBI is illustrated in Fig. 9. Specifically, Fig. 9 shows a schematic representation of an operation of Enhanced Cell DTX with a CDBI (Cell DTX Bypass Indication), where the active period is dynamically extended (non-active period shortened) and Cell DTX continues on a regular basis after the traffic burst is fully served. In Fig. 9, the abscissa denotes the time. Cell DTX active periods are indicated by reference numerals 120_1-120_7, where Cell DTX inactive periods are indicated by reference numerals 122_1 - 122_7. When a Cell DTX Bypass Indication 150 is received, for example, at the beginning or during Cell DTX active period 120_3, Cell DTX is bypassed and transmissions are allowed during an extended active period, as indicated by block 152. In contrast to the conventional Cell DTX shown in Fig. 7, where de-activating has a permanent effect (until next activation or explicit re-activation is signaled), a CDBI will bypass the Cell DTX mechanism only for a temporary amount of time. There are a number of advantages in this approach. Most prominently, there is no overhead or delay in activating Cell DTX again, after the traffic is fully served. In particular, if switching from regular operation to Cell DTX entails a decision delay the approach with a CDBI will save that time too, leading to further energy savings.

In embodiments, depending on the information to be transmitted, bypassing Cell DTX may apply to one single UE, a group of UEs (multicast), or all UEs of the cell (broadcast). Whether temporarily bypassing is signaled to one or more UEs may depend on the priority of the data, e.g. any type of QoS indication or for emergency calls I data or further indications.

In embodiments, the CDBI may be sent, for example, on DCI with UE-Specific RNTI, DCI with common (group) RNTI or MAC CE or as a Wake-Up Signal (WUS). A CDBI may indicate a period, an offset or a time stamp on where different behavior is expected than the Cell DTX non-active (or OFF) period. For example, in some embodiments a CDBI may be used to apply the behavior of Cell DTX active (or ON) period. In other embodiments, a CDBI may be used to make the regular behavior (e.g. when no Cell DTX is configured or activated) valid for the given period. Alternatively, on reception of CDBI the active period may start immediately or a time offset could indicate when to switch to the active period.

In yet other embodiments the behavior after receiving a CDBI may be specific to the period where it is valid, i.e., the behavior during the period indicated on CDBI is different from the Cell DTX active period, Cell DTX non-active or regular operation.

In embodiments, the period on the CDBI may be represented in different ways:

• Pre-determined by specification, e.g., every time a CDBI is present, then Cell DTX is bypassed by an amount of time known to the UE and gNB (e.g. given in a table or formula).

• Pre-configured in the UEs and network.

• Dynamically mapped where a field on CDBI indicates the period. Here further variants are possible: o The period may be indicated relative to the Cell DTX period (e.g. as in Fig. 9 is indicating 2 Cell DTX periods). o The period may be indicated in a time unit such as ms and/or ps. o The period may be indicated in number of time slots. o The period may be indicated in number of frames. o The period may be indicated relative to SSB burst period. For example, 1 SSB burst period, 2 SSB burst periods, etc. o Any other time/frame/period representation known by both gNB and UE.

• Any of the periods above may refer to an absolute time or time offset indicating the period.

As an example of one embodiment, a CDBI period is mapped to one bit (e.g. in DCI or MAC CE) and a value of 1 indicates that in the current cell DTX period, there will be no CELL DTX non-active time, i.e., cell DTX active part will be extended over the whole period whereas a value of 0 indicates that CELL DTX non-active will apply. Naturally, this may also work in the opposite way (0 to indicate CELL active extension, 1 to indicate CELL DTX non-active time is present).

In another embodiment, a CDBI period is mapped to one bit (e.g. in DCI or MAC CE) and a value of 0 indicates that the period is valid for M Cell DTX periods (e.g M=1) and a value of 1 indicates that the CDBI period is valid for N Cell DTX periods (e.g. M=3). This approach can be extended to any number of bits, where each codeword may be mapped to a different number of Cell DTX periods.

In embodiments, it is not precluded that a CDBI is sent multiple times. For example, the gNB may send a CDBI when a first traffic burst arrives and after a second traffic burst arrives the gNB may decide to send a second CDBI to extend the bypass time even further.

In embodiments, CDBI may be sent to several UEs, simultaneously or not, indicating the same period or not.

A preferred embodiment is to have Cell DTX activation and de-activation as common (group) DCI signaling, but the CDBI is signaled to individual UEs, e.g. as UE specific DCI command or MAC CE. In this way, the signaling overhead of activation and de-activation can be kept in check while the gNB has the flexibility to bypass the Cell DTX behavior to serve traffic bursts to specific UEs as quickly as possible. Other UEs do not need to be aware that actually the gNB is transmitting during the CELL DTX non-active. Only the UE which receives the CDBI changes the behavior and e.g. it may monitor PDCCH normally and transmit/receive on channels which have restrictions during CELL DTX non-active period. This approach also avoids reliability issues with the state-of-art signaling as the UE specific signaling may be individually acknowledged.

In embodiments, a CDBI may contain a separate explicit indication whether a SPS configuration will be re-activated during the specified period.

In embodiments, a CDBI may contain a separate explicit indication whether a RACH configuration will be re-activated during the specified period.

In embodiments, a CDBI may contain a separate explicit indication whether a CSI-RS configuration will be re-activated during the specified period. In some embodiments a CDBI may allow re-transmissions, e.g. HARQ retransmissions or RLC retransmissions, during the specified period while new transmisssions will not be possible.

The signaling used for CDBI may also be reused to de-activate Cell DTX completely, for example, a particular codeword of CDBI period may indicate an “infinite period” or equivalently permanent de-activation. This may be used e.g. in case of critical scenarios (e.g. any kind of emergencys) and / or a change in the traffic (e.g. unexpected change to high traffic due to an event, such as an emergency I critical situation, accident, etc.). High and I or critical traffic load may then be expected over a longer period of time, where Cell DTX or DRX may not be applicable. Cell DTX may then be started explicitly once the (critical) scenario has finished and low traffic resumes.

Another possibility is that the cell sends CDBI indicator as a Wake Up Signal (WUS) to the specific UE in order to notify the UE about the incoming traffic. In this case the UE which receives the dedicated WUS signal may stop Cell DTX and C-DRX non-active behavior (at least for a defined period of time) and would be ready to receive the traffic. The UE may continue the previously configured C-DRX as soon as that the traffic is received.

The UE configuration may contain an alternative C-DRX configuration which is applicable in case a CDBI is received.

In some embodiments, a CDBI may be assumed implicitly if the UE receives any PDCCH message during the Cell DTX active time. If no PDCCH is received during the active time, the UE behaves as no CDBI is received and it only considers PDCCH reception if both C-DRX and Cell DTX are on active time.

In embodiments, a CDBI may contain a buffer size indication in addition or in substitution of the period. In the case a buffer size is used, the UE may consider the gNB is bypassing Cell DTX until the amount of indicated data is fully transmitted to the UE.

In order to reduce the delay, the SSB symbols may be considered part of the active (or on time) in Cell DTX. A CDBI may also be sent to activate the SSB symbols as part of the active time. This indication may also be done permanently. The SSB symbols may be configured as active time as part of the initial beam pairing. For this sake, the gNB may configure a UE with one ore more specific beam indexes which are considered part of the active time. Each UE may also be configured with a different ON period in order to have a specific SSB index as part of its active time. A CDBI field or information element may indicate SSB indexes which will remain active. In another embodiment, targeted at extreme energy savings both at gNB and UE, the active time of Cell DTX is divided into two parts. One part is fixed and always there, typically aligned to SSB symbols or slot. If the UE receives the CDBI indication, then the remaining active time is enabled. Otherwise, it can sleep more quickly. In this case, the CDBI is essentially changing dynamically the on-duration. The Cell DTX configuration in this case may include two ON durations: one which is the basic duration, if no CDBI is received and another ON duration for the case a CDBI is received. This is illustrated in Fig. 10. Specifically, Fig. 10 shows a schematic representation of an embodiment where CDBI is used to extend the active duration (not necessarily over the whole period). The second on duration may be configured in advanced. In Fig. 10, the abscissa denotes the time. Cell DTX active periods are indicated by reference numerals 120_1-120_6, where Cell DTX inactive periods are indicated by reference numerals 122_1-122_7. When a Cell DTX Bypass Indication 150 is received, for example, at the beginning or during Cell DTX active period 120_3, the Cell DTX active period 120_3 is switched to the duration for the case a CDBI is received, i.e. the Cell DTX active period 120_3 is extended when compared to the other Cell DTX active periods 120_1 , 120_2, 120_4-120_6, which have the basic duration.

Naturally, the signaling logic can also be reversed and instead of indicating extended active on duration, the signaling may be provided to indicate reduced active durations instead. This would be done for example on each cycle where the gNB has an empty buffer. This is illustrated in Fig. 11. Specifically, Fig. 11 shows a schematic representation of an embodiment with alternative signaling. The periods of reduced active time are signaled with a CDRI (Cell DTX reduction indication) instead of the extended periods. In Fig. 11 , the abscissa denotes the time. Cell DTX active periods are indicated by reference numerals 120_1-120_5, where Cell DTX inactive periods are indicated by reference numerals 122_1-122_6. When a Cell DTX Bypass Indication 150 is received, for example, at the beginning or during Cell DTX active period 120_3, the Cell DTX active period 120_3 is switched to the reduced active time, when compared to the other Cell DTX active periods 120_1 , 120_2, 120_4-120_5, which have the default active time.

In this case, the indication may be a CDRAI (Cell DTX Reduced Active Indication) instead. For further enhancement in energy saving in some scenarios with extremely low load, the on duration can even be skipped or in other words it can be competely eliminated. This can enable the cell to sleep for a longer time or to go to a deeper sleep stage and save more energy.

The embodiments described before can be also combined. For example, an indication from the gNB to the UE may vary the active time dynamically between multiple levels, e.g.: reduced or eliminated ON duration, extended ON duration and full period. This is equivalent to combination of CDBI and CDRAI.

1. Changing configuration

In case there are multiple configurations defined for the cell, in occasion of the traffic burst, emergency call or eCall arrival, the configuration can be changed. The change in configuration can be defined as changing one or couple of the parameters related to cell DTX including the prefix, on duration and period. In case a traffic burst, emergency call or an eCall arrives, the cell can change the on duration parameter to a larger value. The new value will be applied from the time on till the value is changed by the cell again. The traffic burst can either be served in the first on duration or during the several cycles.

As this method is delay sensitive, changing the configuration could be signaled immediately with minimum error possible. Therefore L1/L2 signaling may be preferred.

Fig. 12 shows in a schematic representation that a configuration may be changed to serve the traffic in Cell DTX. A UE traffic indication is necessary to trigger this process. In Fig. 12, the abscissa denotes the time. Cell DTX active periods are indicated by reference numerals 120_1-120_7, where Cell DTX inactive periods are indicated by reference numerals 122_1 - 122_8. When a Cell DTX changing configuration indication 151 is received, for example, at the beginning or during Cell DTX active period 120_3, the Cell DTX active period 120_3 and the subsequent Cell DTX active periods 120_4-120_7 are extended.

2. Handling the emergency calls and eCalls

A CDBI may be used as part of Random Access (RA) Procedure, especially when the procedure is triggered to establish an emergency call, eCall or to provide high priority access. For this purpose, the gNB may designate a particular random access preamble which triggers a higher priority RA. As a response to RA the gNB may send a CDBI to shorten the access delay. In another embodiment the CDBI may be implicit as a response to high priority RA, i.e., if a UE access the network with the high priority preamble the gNB always accept such request. The possibility of an implicit CDBI may be indicated in broadcast information, e.g. MIB, SIB-1 or other SIB. The values (e.g. period) to be assumed on the implicit CDBI may be send on broadcast information, e.g. MIB, SIB-1 or other SIB, or pre-defined. Another possibility would be for the UE to wake up the cell. In this case the gNB may receive e.g. a high priority preamble which could be considered as a Cell Wake up Signal (C-WLIS). In this case the gNB may stop the DTX cycle and serve the traffic immediately. Afer serving the traffic the gNB may go back to the default configuration of cell DTX and there is no necessity for the other UEs to track the activation/deactivation the gNB.

Fig. 13 shows in a schematic representation that the cell can be activated using a C-WLIS to serve the traffic in Cell DTX. An indicator (WUS) is necessary to trigger this process. In Fig. 13, the abscissa denotes the time. Cell DTX active periods are indicated by reference numerals 120_1-120_6, where Cell DTX inactive periods are indicated by reference numerals 122_1 - 122_7. When a CBDI or de-activation indication 150 is received, for example, at the beginning or during Cell DTX active period 120_3, Cell DTX is bypassed and transmissions are allowed during an extended active period, as indicated by block 152.

3. Extension to Cell DRX

Cell DRX works in a similar way to Cell DTX but it applies to the reception of signals at the gNB. When new uplink traffic arrives at a UE, the Cell DRX cycle may also cause extra delay on the request. The CDBI may also be used to indicate whether Cell DRX is to be skipped, as long as the UE has a way to inform the gNB that it has important traffic which would benefit from Cell DRX being bypassed. In this case the CDBI works as a confirmation from the gNB that the UE request for transmission was processed and the gNB will temporarily bypass Cell DRX in order that the traffic can be served more quickly. The operation is illustrated in Fig. 14. Specifically, Fig. 14 shows in a schematic representation that CDBI may also be used to bypass Cell DRX. A UE traffic indication is necessary to trigger this process. In Fig. 14, the abscissa denotes the time. Cell DRX active periods are indicated by reference numerals 120_1-120_7, where Cell DRX inactive periods are indicated by reference numerals 122_1- 122_7. When a Cell DRX Bypass Indication (CBDI) 150 is received, for example, at the beginning or during Cell DRX active period 120_3, Cell DRX is bypassed, as indicated by block 152.

In embodiments, in case of Cell DRX, the needed UE traffic indication may be at least one out of:

• a Wake-up signal, which may also be possible to transmit during Cell DRX non-active period,

• a random access request,

• a scheduling request, a buffer status report (on PLISCH Oder PLICCH).

In embodiments, a CDBI for Cell DRX may contain a separate explicit indication whether a RACH configuration will be re-activated during the specified period.

In embodiments, a CDBI for Cell DRX may contain a separate explicit indication whether a CG configuration will be re-activated during the specified period.

In embodiments, a CDBI for Cell DRX may contain a separate explicit indication whether a SRS configuration will be re-activated during the specified period.

In embodiments, a CDBI for Cell DRX may contain a separate explicit indication whether a SR configuration will be re-activated during the specified period.

In embodiments, a CDBI may contain a separate explicit indication whether a CSI report configuration will be re-activated during the specified period.

In embodiments, the CDBI for Cell DTX and Cell DRX may also be combine, i.e., when a CDBI is sent both Cell DTX and Cell DRX are bypassed.

Alternatively, the indication may be sent on the same signaling but whether Cell DTX and Cell DRX are to be bypassed is independently configured. For example, a CDBI may have two fields, one to indicate Cell DTX bypass, another to indicate Cell DRX bypass:

• 00 - Neither Cell DTX nor Cell DRX are bypassed

• 01 - Cell DTX non-active time applies, but Cell DRX is bypassed

• 10 - Cell DRX non-active time applies, but Cell DTX is bypassed

• 11 - both Cell DTX and DRX are bypassed.

4. _ Associated deactivation of other NES techniques

Since CDBI is intended to serve bursty traffic as quickly as possible (with little delay) and to return to an energy saving mode, other NES techniques (in spatial, power or frequency domains) that are active along with cell DTX can also be similarly deactivated for until the traffc burst is served.

In some embodiments, to serve the bursty traffic with less delay, a spatial domain NES technique where, e.g., a reduced set of available antenna ports/elements (or a spatial adaptation pattern) is activated for NES can be disabled temporarily to activate all available (or a larger set of) spatial resources, which can be inidicated via a CDBI. The CDBI may also imply to send an aperiodic CSI report and/or to re-activate CSI-RS ports.

In other embodiments, to serve the bursty traffic with less delay, a power domain NES technique where, e.g., a lowered transmit power is set for NES can be disabled to transmit with a larger or maximum transmit power, which can be indicated via a CDBI.

In other embodiments, to serve the bursty traffic with less delay, a frequency domain NES technique where, e.g., a secondary carrier is made inactive for NES can be disabled to effect more bandwidth, which can be indicated via a CDBI. For example, the CDBI may serve also as an indication to change the BWP or to re-activate other carriers.

5. _ Further embodiments

Embodiments described herein allows to operate Cell DTX and DRX with lower latency. In this way, the QoS of UEs can be properly guaranteed while saving much more energy at the network because Cell DTX and DRX are enabled more often.

Embodiments described herein may be applied in wireless networks, such as 5G NR.

Embodiments described herein specify enhancement on cell DTX/DRX mechanism including the alignment of cell DTX/DRX and UE DRX in RRC_CONNECTED mode, and inter-node information exchange on cell DTX/DRX.

Embodiments described herein provide a signaling to bypass Cell DTX on demand without the need of first disabling it. For example, the signaling can be used to handle a traffic burst for a specific UE without other UEs needing to know about it. For example, new signaling can be used to shorten the response time (random access response) for emergency calls.

Embodiments described herein allow for reducing the latency when compared to Cell DTX as currently discussed in standardization. It will make more beneficial to use Cell DTX more often. It will enable emergency call even with Cell DTX activated.

Various elements and features of the present invention may be implemented in hardware using analog and/or digital circuits, in software, through the execution of instructions by one or more general purpose or special-purpose processors, or as a combination of hardware and software. For example, embodiments of the present invention may be implemented in the environment of a computer system or another processing system. Fig. 15 illustrates an example of a computer system 500. The units or modules as well as the steps of the methods performed by these units may execute on one or more computer systems 500. The computer system 500 includes one or more processors 502, like a special purpose or a general-purpose digital signal processor. The processor 502 is connected to a communication infrastructure 504, like a bus or a network. The computer system 500 includes a main memory 506, e.g., a random-access memory (RAM), and a secondary memory 508, e.g., a hard disk drive and/or a removable storage drive. The secondary memory 508 may allow computer programs or other instructions to be loaded into the computer system 500. The computer system 500 may further include a communications interface 510 to allow software and data to be transferred between computer system 500 and external devices. The communication may be in the from electronic, electromagnetic, optical, or other signals capable of being handled by a communications interface. The communication may use a wire or a cable, fiber optics, a phone line, a cellular phone link, an RF link and other communications channels 512.

The terms “computer program medium” and “computer readable medium” are used to generally refer to tangible storage media such as removable storage units or a hard disk installed in a hard disk drive. These computer program products are means for providing software to the computer system 500. The computer programs, also referred to as computer control logic, are stored in main memory 506 and/or secondary memory 508. Computer programs may also be received via the communications interface 510. The computer program, when executed, enables the computer system 500 to implement the present invention. In particular, the computer program, when executed, enables processor 502 to implement the processes of the present invention, such as any of the methods described herein. Accordingly, such a computer program may represent a controller of the computer system 500. Where the disclosure is implemented using software, the software may be stored in a computer program product and loaded into computer system 500 using a removable storage drive, an interface, like communications interface 510.

The implementation in hardware or in software may be performed using a digital storage medium, for example cloud storage, a floppy disk, a DVD, a Blue-Ray, a CD, a ROM, a PROM, an EPROM, an EEPROM or a FLASH memory, having electronically readable control signals stored thereon, which cooperate (or are capable of cooperating) with a programmable computer system such that the respective method is performed. Therefore, the digital storage medium may be computer readable. Some embodiments according to the invention comprise a data carrier having electronically readable control signals, which are capable of cooperating with a programmable computer system, such that one of the methods described herein is performed.

Generally, embodiments of the present invention may be implemented as a computer program product with a program code, the program code being operative for performing one of the methods when the computer program product runs on a computer. The program code may for example be stored on a machine-readable carrier.

Other embodiments comprise the computer program for performing one of the methods described herein, stored on a machine-readable carrier. In other words, an embodiment of the inventive method is, therefore, a computer program having a program code for performing one of the methods described herein, when the computer program runs on a computer.

A further embodiment of the inventive methods is, therefore, a data carrier (or a digital storage medium, or a computer-readable medium) comprising, recorded thereon, the computer program for performing one of the methods described herein. A further embodiment of the inventive method is, therefore, a data stream or a sequence of signals representing the computer program for performing one of the methods described herein. The data stream or the sequence of signals may for example be configured to be transferred via a data communication connection, for example via the Internet. A further embodiment comprises a processing means, for example a computer, or a programmable logic device, configured to or adapted to perform one of the methods described herein. A further embodiment comprises a computer having installed thereon the computer program for performing one of the methods described herein.

In some embodiments, a programmable logic device (for example a field programmable gate array) may be used to perform some or all of the functionalities of the methods described herein. In some embodiments, a field programmable gate array may cooperate with a microprocessor in order to perform one of the methods described herein. Generally, the methods are preferably performed by any hardware apparatus.

The above described embodiments are merely illustrative for the principles of the present invention. It is understood that modifications and variations of the arrangements and the details described herein are apparent to others skilled in the art. It is the intent, therefore, to be limited only by the scope of the impending patent claims and not by the specific details presented by way of description and explanation of the embodiments herein. List of References [1] TR 38.864 v18.0.0 “Study on network energy savings for NR” , January 2023

Abbreviations

3GPP third generation partnership project

ACK acknowledgement

BFD beam failure detection

BFR beam failure recovery

BRP beam forming resource pool

BWP bandwidth part

BS base station

CD-SSB cell-defining synchronization signal block

CDM code division multiplexing

CG configured grant

CRI CSI-RS resource indicator

CQI channel quality indicator

CSI channel state information

CSI-RS channel state information - reference signal

D2D device-to-device

DC dual conectivity

DCI downlink control information

DL downlink

DM-RS demodulation reference signal

DRX discontinues reception

DTX discontinues transmission eNB evolved node B

FR1 frequency range one

FR2 frequency range two gNB next generation node B

HARQ hybrid automatic repeat request

ID identity

IFFT inverse fast Fourier transform loT internet of things

LTE long-term evolution

MAC medium access control

MAC-CE medium access control - control element

MCG master cell group MIB master information block

NACK negative acknowledgement

NCD-SSB non cell-defining synchronization signal block

NES network energy saving

NR new radio

OFDM orthogonal frequency-division multiplexing

OFDMA orthogonal frequency-division multiple access

PBCH physical broadcast channel

PC5 interface using the sidelink channel for D2D communication

PDCCH physical downlink control channel

PDSCH physical downlink shared channel

PM I precoding matrix indicator

PRACH physical random access channel

PRS positioning reference signal

PSBCH physical sidelink broadcast channel

PSCCH physical sidelink control channel

PSFCH physical sidelink feedback channel

PSS primary synchronization signal

PSSCH physical sidelink shared channel

PLICCH physical uplink control channel

PLISCH physical uplink shared channel

QCL quasi - colocation

RACH random access channel

RAN radio access networks

RE resource element

RRC radio resource control

RS reference signal

RSRP reference signal received power

RSRQ reference signal received quality

SCI sidelink control information

SCG secondary cell group

SIB system information block

SL sidelink

SPS semi persistent scheduling

SR scheduling request

SRS sounding reference signal

SSB synchronization signal block SSS secondary synchronization signal

S-SSB sidelink synchronization signal block sTTI short transmission time interval

TDD time division duplex UE user equipment, e.g., a smartphone or loT node

UL uplink

UMTS universal mobile telecommunication system

V2X vehicle-to-everything

V2V vehicle-to-vehicle

Claims

1. First transceiver (202i) of a wireless communication network, wherein the first transceiver (202i) is configured to operate in a cell discontinuous transmission, DTX, activated mode in which a cell discontinuous transmission, DTX, configuration is activated, wherein the first transceiver (202i) is configured to switch, in response to a reception of a control information indicating a bypass of the activated cell discontinuous transmission, DTX, configuration, into a cell discontinuous transmission, DTX, bypass mode for a limited time period in which cell discontinuous transmission, DTX, restrictions do not apply.

2. First transceiver (202i) according to the preceding claim, wherein the cell discontinuous transmission, DTX, restrictions are bypassed by: a temporary deactivation of the cell discontinuous transmission, DTX, configuration or an extension of an active period of a cell discontinuous transmission, DTX, cycle. or a modification of at least one cell discontinuous transmission, DTX, parameter.

3. First transceiver (202i) according to one of the preceding claims, wherein in the cell discontinuous transmission, DTX, activated mode the first transceiver (202i) is configured to operate using a cell discontinuous transmission, DTX, cycle according to the cell discontinuous transmission, DTX, configuration.

4. First transceiver (202i) according to one of the preceding claims, wherein the first transceiver (202i) is configured to switch into the cell discontinuous transmission, DTX, bypass mode only for the limited time period.

5. First transceiver (202i) according to one of the preceding claims, wherein the first transceiver (202i) is configured to automatically switch back into the cell discontinuous transmission, DTX, activated mode after the limited time period.

6. First transceiver (202i) according to one of the preceding claims, wherein the first transceiver (202i) is configured to switch back into the cell discontinuous transmission, DTX, activated mode after the limited time period independent on a reception of a control information.

7. First transceiver (202i) according to one of the preceding claims, wherein the first transceiver (202i) is configured to receive the control information from a second transceiver (200) of the wireless communication network.

8. First transceiver (202i) according to one of the preceding claims, wherein the control information is a downlink control information, DCI, or a medium access control control element, MAC CE.

9. First transceiver (202i) according to one of the preceding claims, wherein the limited time period is pre-determined, or wherein the limited time period is preconfigured, or wherein the control information indicates the limited time period.

10. First transceiver (202i) according to the preceding claim, wherein the control information indicates the limited time period relative to a cell discontinuous transmission, DTX, period, by means of a time value, by means of a number of time slots, by means of a number of frames, and/or relative to a synchronization signal block period, SSB, burst period.

11. First transceiver (202i) according to one of the preceding claims, wherein the control information is a first control information, wherein the first transceiver (202i) is configured to receive a second control information indicating that the limited time period is extended to an extended limited time period, wherein the first transceiver (202i) is configured to stay, in response to the reception of the second control information, in the cell discontinuous transmission, DTX, bypass mode for the extended limited time period.

12. First transceiver (202i) according to one of the preceding claims, wherein the control information further indicates whether a semi-persistent scheduling, SPS, configuration is to be re-activated during the limited time period.

13. First transceiver (202i) according to one of the preceding claims, wherein the control information further indicates whether a random access control channel, RACH, configuration is to be re-activated during the limited time period.

14. First transceiver (202i) according to one of the preceding claims, wherein the control information further indicates whether a channel state information reference signal, CSI-RS, configuration is to be re-activated during the limited time period.

15. First transceiver (202i) according to one of the preceding claims, wherein the control information indicates that re-transmissions are allowed during the limited time period.

16. Frist transceiver (202i) according to the preceding claim, wherein the retransmission is a hybrid automatic repeat request, HARQ, retransmission or a radio link control, RLC, retransmission.

17. First transceiver (202i) according to one of the preceding claims, wherein the control information comprises a buffer size indication indicating an amount of data to be transmitted, wherein the limited time period is defined by a time period required to fully transmit the amount of indicated data.

18. First transceiver (202i) according to one of the preceding claims, wherein an active period of a cell discontinuous transmission, DTX, cycle is subdivided into a first sub-period and a second sub-period, wherein the first sub-period is part of the cell discontinuous transmission, DTX, configuration, wherein the second sub-period is activated in response to the reception of the control information, wherein a length of the second sub-period corresponds to the limited time period.

19. First transceiver (202i) according to one of the preceding claims, wherein the cell discontinuous transmission, DTX, restrictions are bypassed by a modification of at least one cell discontinuous transmission, DTX, parameter, wherein the at least one cell discontinuous transmission, DTX, parameter, is at least one out of a cell discontinuous transmission, DTX, prefix, a cell discontinuous transmission, DTX, period, a cell discontinuous transmission, DTX, on-duration.

20. First transceiver (202i) according to the preceding claim, wherein the control information is received via L1 and/or L2 signaling.

21. First transceiver (202i) according to one of the preceding claims, wherein the first transceiver (202i) is configured to transmit a particular random access preamble to the second transceiver (200) in response to an emergency situation, in order to trigger a bypass of the activated cell discontinuous transmission, DTX, configuration.

22. First transceiver (202i) according to one of the preceding claims, wherein, when an implicit activation of cell discontinuous transmission, DTX, bypass mode is indicated, the first transceiver (202i) is configured, in response to an emergency situation, to transmit a particular random access preamble to the second transceiver (200) and to automatically switch into the cell discontinuous transmission, DTX, bypass mode for the limited time period.

23. First transceiver (202i) according to the preceding claim, wherein the implicit activation of cell discontinuous transmission, DTX, bypass mode is indicated by means of one out of broadcast information, a master information block, MIB, a system information block one, SIB-1 , or another system information block, or wherein the implicit activation of cell discontinuous transmission, DTX, bypass mode is pre-defined.

24. First transceiver (202i) according to one of the preceding claims, wherein the first transceiver (202i) is configured to transmit a particular random access preamble to the second transceiver (200) as wake-up signal in response to an emergency situation.

25. First transceiver (202i) according to one of the preceding claims, wherein the first transceiver (202i) is configured to deactivate, in the cell discontinuous transmission, DTX, bypass mode, at least one network energy saving technique that is active in the cell discontinuous transmission, DTX, activated mode.

26. First transceiver (202i) according to the preceding claim, wherein the at least one network energy saving technique is at least one out of a reduction of a number of available antenna ports or antenna elements, a lowered transmit power, a deactivation of one or more carriers, a deactivation of a bandwidth part.

27. First transceiver (202i) according to one of the preceding claims, wherein the first transceiver (202i) is configured to reactivate, in the cell discontinuous transmission, DTX, bypass mode, a transmission of channel state information, CSI, reports for the limited time period.

28. First transceiver (202i) according to one of the preceding claims, wherein the first transceiver (202i) is configured to reactivate, in the cell discontinuous transmission, DTX, bypass mode, a transmission of channel state information reference signals, CSI-RS, for the limited time period.

29. First transceiver (202i) according to one of the preceding claims, wherein the control information further indicates a bypass of an activated cell discontinuous reception, DRX, configuration, wherein the first transceiver (202i) is configured, in response to the reception of the control information, to switch into a cell discontinuous reception, DRX, bypass mode for a limited time period in which cell discontinuous reception, DRX, restrictions do not apply.

30. First transceiver (202i) according to the preceding claim, wherein the cell discontinuous reception, DRX, restrictions are bypassed by: a temporary deactivation of the cell discontinuous reception, DRX, configuration or an extension of an active period of a cell discontinuous reception, DRX, cycle. or a modification of at least one cell discontinuous reception, DRX, parameter.

31. First transceiver (202i) of a wireless communication network, wherein the first transceiver (202i) is configured to operate in a cell discontinuous reception, DRX, activated mode in which a cell discontinuous reception, DRX, configuration is activated, wherein the first transceiver (202i) is configured to transmit a first control information to a second transceiver (200) of the wireless communication network, the first control information indicating a cell discontinuous reception, DTR, bypass request, wherein the first transceiver (202i) is configured to switch, in response to a reception of a second control information indicating a bypass of the activated cell discontinuous reception, DRX, configuration, into a cell discontinuous reception, DRX, bypass mode for a limited time period in which cell discontinuous reception, DRX, restrictions do not apply.

32. First transceiver (202i) according to the preceding claim, wherein the cell discontinuous reception, DRX, restrictions are bypassed by: a temporary deactivation of the cell discontinuous reception, DRX, configuration or an extension of an active period of a cell discontinuous reception, DRX, cycle. or a modification of at least one cell discontinuous reception, DRX, parameter.

33. First transceiver (202i) according to one of the preceding claims, wherein in the cell discontinuous reception, DRX, activated mode the first transceiver (202i) is configured to operate using a cell discontinuous reception, DRX, cycle according to the cell discontinuous reception, DRX, configuration.

34. First transceiver (202i) according to one of the preceding claims, wherein the first transceiver (202i) is configured to transmit the first control information in response to an arrival of uplink traffic.

35. First transceiver (202i) according to one of the preceding claims, wherein the first control signal is a wake-up signal, a random access request, a scheduling request, a buffer status report.

36. First transceiver (202i) according to one of the preceding claims, wherein the second control information further indicates whether a random access control channel, RACH, configuration is to be re-activated during the limited time period.

37. First transceiver (202i) according to one of the preceding claims, wherein the second control information further indicates whether a configured grant, CG, configuration is to be re-activated during the limited time period.

38. First transceiver (202i) according to one of the preceding claims, wherein the second control information further indicates whether a sounding reference signal, SRS, configuration is to be re-activated during the limited time period.

39. First transceiver (202i) according to one of the preceding claims, wherein the second control information further indicates whether a scheduling request, SR, configuration is to be re-activated during the limited time period.

40. First transceiver (202i) according to one of the preceding claims, wherein the second control information further indicates whether a channel state information, CSI, report configuration is to be re-activated during the limited time period.

41. First transceiver (202i) of a wireless communication network, wherein the first transceiver (202i) is configured to operate in a cell discontinuous transmission, DRX, and cell discontinuous reception, DRX, activated mode in which a cell discontinuous transmission, DTX, configuration and a cell discontinuous reception, DRX, configuration is activated, wherein the first transceiver (202i) is configured to receive a control information from a second transceiver (200) of the wireless communication network, the control information indicating at least one out of a bypass of the activated cell discontinuous transmission, DTX, configuration, a bypass of the activated cell discontinuous reception, DRX, configuration, wherein, in case that the control information indicates a bypass of the activated cell discontinuous transmission, DTX, configuration, the first transceiver (202i) is configured to switch into a cell discontinuous transmission, DTX, bypass mode for a limited time period in which cell discontinuous transmission, DTX, restrictions do not apply, wherein, in case that the control information indicates a bypass of the activated cell discontinuous reception, DRX, configuration, the first transceiver (202i) is configured to switch into a cell discontinuous reception, DRX, bypass mode for a limited time period in which cell discontinuous reception, DRX, restrictions do not apply.

42. First transceiver (202i) according to the preceding claim, wherein the control information comprises two fields, wherein a first field indicates whether the activated cell discontinuous transmission, DTX, configuration is to be bypassed, and wherein a second field indicates whether the activated cell discontinuous reception, DRX, configuration is to be bypassed.

43. Second transceiver (200) of a wireless communication network, wherein the second transceiver (200) is configured to operate in a cell discontinuous transmission, DTX, activated mode in which a cell discontinuous transmission, DTX, configuration is activated, wherein the second transceiver (200) is configured to transmit a control information to the at least one first transceiver (202i), the control information indicating a bypass of the activated cell discontinuous transmission, DTX, configuration, wherein the second transceiver (200) is configured to switch into a cell discontinuous transmission, DTX, bypass mode for a limited time period in which cell discontinuous transmission, DTX, restrictions do not apply.

44. Second transceiver (200) according to the preceding claim, wherein the cell discontinuous transmission, DTX, restrictions are bypassed by: a temporary deactivation of the cell discontinuous transmission, DTX, configuration, or an extension of an active period of a cell discontinuous transmission, DTX, cycle, or a modification of at least one cell discontinuous transmission, DTX, parameter.

45. Second transceiver (200) according to one of the preceding claims, wherein in the cell discontinuous transmission, DTX, activated mode the second transceiver (200) is configured to perform transmission according to the discontinuous transmission, DTX, configuration.

46. Second transceiver (200) according to the preceding claim, wherein the second transceiver (200) is configured to switch into the cell discontinuous transmission, DTX, bypass mode only for the limited time period.

47. Second transceiver (200) according to one of the preceding claims, wherein the control information is a downlink control information, DCI, or a medium access control control element, MAC CE.

48. Second transceiver (200) according to one of the preceding claims, wherein the limited time period is pre-determined, or wherein the limited time period is preconfigured, or wherein the control information indicates the limited time period.

49. Second transceiver (200) according to the preceding claim, wherein the control information indicates the limited time period relative to a cell discontinuous transmission, DTX, period, by means of a time value, by means of a number of time slots, by means of a number of frames, and/or relative to a synchronization signal block period, SSB, burst period.

50. Second transceiver (200) according to one of the preceding claims, wherein the control information is a first control information, wherein the second transceiver is configured to transmit a second control information indicating that the limited time period is extended to an extended limited time period.

51. Second transceiver (200) according to one of the preceding claims, wherein the second transceiver (200) is configured to transmit the control information to a plurality of first transceivers.

52. Second transceiver (200) according to the preceding claim, wherein the second transceiver is configured to transmit the control information to the plurality of first transceivers as group downlink control information, DCI.

53. Second transceiver (200) according to one of the preceding claims, wherein the control information further indicates whether a semi-persistent scheduling, SPS, configuration is to be re-activated during the limited time period.

54. Second transceiver (200) according to one of the preceding claims, wherein the control information further indicates whether a random access control channel, RACH, configuration is to be re-activated during the limited time period.

55. Second transceiver (200) according to one of the preceding claims, wherein the control information further indicates whether a channel state information reference signal, CSI-RS, configuration is to be re-activated during the limited time period.

56. Second transceiver (200) according to one of the preceding claims, wherein the control information indicates that re-transmissions are allowed during the limited time period.

57. Second transceiver (200) according to the preceding claim, wherein the retransmission is a hybrid automatic repeat request, HARQ, retransmission or a radio link control, RLC, retransmission.

58. Second transceiver (200) according to one of the preceding claims, wherein the control information comprises a buffer size indication indicating an amount of data to be transmitted, wherein the limited time period is defined by a time period required to fully transmit the amount of indicated data.

59. Second transceiver (200) according to one of the preceding claims, wherein an active period of a cell discontinuous transmission, DTX, cycle is subdivided into a first sub-period and a second sub-period, wherein the first sub-period is part of the cell discontinuous transmission, DTX, configuration, wherein the second sub-period is activated in response to the reception of the control information, wherein a length of the second sub-period corresponds to the limited time period.

60. Second transceiver (200) according to one of the preceding claims, wherein the cell discontinuous transmission, DTX, restrictions are bypassed by a modification of at least one cell discontinuous transmission, DTX, parameter, wherein the at least one cell discontinuous transmission, DTX, parameter, is at least one out of a cell discontinuous transmission, DTX, prefix, a cell discontinuous transmission, DTX, period, a cell discontinuous transmission, DTX, on-duration.

61. Second transceiver (200) according to the preceding claim, wherein the second transceiver (200) is configured to transmit the control information via L1 and/or L2 signaling.

62. Second transceiver (200) according to one of the preceding claims, wherein the second transceiver (200) is configured to transmit the control information in response to a reception of particular random access preamble from the first transceiver (202i).

63. Second transceiver (200) according to one of the preceding claims, wherein the second transceiver (200) is configured to indicate to the at least one first transceiver (202i) an implicit activation of cell discontinuous transmission, DTX, bypass mode, to control the first transceiver (202i) to automatically switch, in response to an emergency situation, into the cell discontinuous transmission, DTX, bypass mode for the limited time period.

64. Second transceiver (200) according to the preceding claim, wherein the second transceiver (200) is configured to indicate the implicit activation of cell discontinuous transmission, DTX, bypass mode to the at least one first transceiver (202i) by means of one out of broadcast information, a master information block, MIB, a system information block one, SIB-1 , or another system information block, or wherein the implicit activation of cell discontinuous transmission, DTX, bypass mode is pre-defined.

65. Second transceiver (200) according to one of the preceding claims, wherein the second transceiver (200) is configured to stop a current DTX cycle in response to a reception of a particular random access preamble as wake-up signal.

66. Second transceiver (200) according to one of the preceding claims, wherein the second transceiver (200) is configured to deactivate, in the cell discontinuous transmission, DTX, bypass mode, at least one network energy saving technique that is active in the cell discontinuous transmission, DTX, activated mode.

67. Second transceiver (200) according to the preceding claim, wherein the at least one network energy saving technique is at least one out of a reduction of a number of available antenna ports or antenna elements, a lowered transmit power, a deactivation of one or more carriers, a deactivation of a bandwidth part.

68. Second transceiver (200) according to one of the preceding claims, wherein the second transceiver (200) is configured to reactivate, in the cell discontinuous transmission, DTX, bypass mode, a transmission of channel state information, CSI, reports for the limited time period.

69. Second transceiver (200) according to one of the preceding claims, wherein the second transceiver (200) is configured to reactivate, in the cell discontinuous transmission, DTX, bypass mode, a transmission of channel state information reference signals, CSI-RS, for the limited time period.

70. Second transceiver (200) according to one of the preceding claims, wherein the control information further indicates a bypass of an activated cell discontinuous reception, DRX, configuration, wherein the second transceiver (200) is configured to switch into a cell discontinuous reception, DRX, bypass mode for a limited time period in which cell discontinuous reception, DRX, restrictions do not apply.

71. Second transceiver (200) according to the preceding claim, wherein the cell discontinuous reception, DRX, restrictions are bypassed by: a temporary deactivation of the cell discontinuous reception, DRX, configuration or an extension of an active period of a cell discontinuous reception, DRX, cycle. or a modification of at least one cell discontinuous reception, DRX, parameter.

72. Second transceiver (200) of a wireless communication network, wherein the second transceiver (200) is configured to operate in a cell discontinuous reception, DRX, activated mode in which a cell discontinuous reception, DRX, configuration is activated, wherein the second transceiver (200) is configured to receive a first control information from a first transceiver (202i) of the wireless communication network, the first control information indicating a cell discontinuous reception, DRX, bypass request, wherein the second transceiver (200) is configured to transmit a second control information to the first transceiver (202i), the second control information indicating a bypass of the activated cell discontinuous reception, DRX, configuration, wherein the second transceiver (200) is configured to switch into a cell discontinuous reception, DRX, bypass mode for a limited time period in which cell discontinuous reception, DRX, restrictions do not apply.

73. Second transceiver (200) according to the preceding claim, wherein the cell discontinuous reception, DRX, restrictions are bypassed by: a temporary deactivation of the cell discontinuous reception, DRX, configuration or an extension of an active period of a cell discontinuous reception, DRX, cycle. or a modification of at least one cell discontinuous reception, DRX, parameter.

74. Second transceiver (200) according to one of the preceding claims, wherein in the cell discontinuous reception, DRX, activated mode the second transceiver (200) is configured to operate using a cell discontinuous reception, DRX, cycle according to the cell discontinuous reception, DRX, configuration.

75. Second transceiver (200) according to one of the preceding claims, wherein the first control information is a wake-up signal, a random access request, a scheduling request, a buffer status report.

76. Second transceiver (200) according to one of the preceding claims, wherein the second control information further indicates whether a random access control channel, RACH, configuration is to be re-activated during the limited time period.

77. Second transceiver (200) according to one of the preceding claims, wherein the second control information further indicates whether a configured grant, CG, configuration is to be re-activated during the limited time period.

78. Second transceiver (200) according to one of the preceding claims, wherein the second control information further indicates whether a sounding reference signal, SRS, configuration is to be re-activated during the limited time period.

79. Second transceiver (200) according to one of the preceding claims, wherein the second control information further indicates whether a scheduling request, SR, configuration is to be re-activated during the limited time period.

80. Second transceiver (200) according to one of the preceding claims, wherein the second control information further indicates whether a channel state information, CSI, report configuration is to be re-activated during the limited time period.

81. Second transceiver (200) of a wireless communication network, wherein the second transceiver (200) is configured to operate in a cell discontinuous transmission, DRX, and cell discontinuous reception, DRX, activated mode in which a cell discontinuous transmission, DTX, configuration and a cell discontinuous reception, DRX, configuration is activated, wherein the second transceiver (200) is configured to transmit a control information to at least one first transceiver (202i) of the wireless communication network, the control information indicating at least one out of a bypass of the activated cell discontinuous transmission, DTX, configuration, a bypass of the activated cell discontinuous reception, DRX, configuration, wherein, in case that the activated cell discontinuous transmission, DTX, configuration is to be bypassed, the second transceiver (200) is configured to switch into a cell discontinuous transmission, DTX, bypass mode for a limited time period in which cell discontinuous transmission, DTX, restrictions do not apply, wherein, in case that the activated cell discontinuous reception, DRX, configuration is to be bypassed, the second transceiver (200) is configured to switch into a cell discontinuous reception, DRX, bypass mode for a limited time period in which cell discontinuous reception, DRX, restrictions do not apply.

82. Second transceiver (200) according to the preceding claim, wherein the control information comprises two fields, wherein a first field indicates whether the activated cell discontinuous transmission, DTX, configuration is to be bypassed, and wherein a second field indicates whether the activated cell discontinuous reception, DRX, configuration is to be bypassed.

83. Method for operating a first transceiver (202i) of a wireless communication network, the method comprising: operating the first transceiver (202i) in a cell discontinuous transmission, DTX, activated mode in which a cell discontinuous transmission, DTX, configuration is activated, switching the first transceiver (202i), in response to a reception of a control information indicating a bypass of the activated cell discontinuous transmission, DTX, configuration, into a cell discontinuous transmission, DTX, bypass mode for a limited time period in which cell discontinuous transmission, DTX, restrictions do not apply.

84. Method for operating a second transceiver (200) of a wireless communication network, the method comprising: operating the second transceiver (200) in a cell discontinuous transmission, DTX, activated mode in which a cell discontinuous transmission, DTX, configuration is activated, transmitting a control information to the at least one first transceiver (202i), the control information indicating a bypass of the activated cell discontinuous transmission, DTX, configuration, switching the second transceiver (200) into a cell discontinuous transmission, DTX, bypass mode for a limited time period in which cell discontinuous transmission, DTX, restrictions do not apply.

85. First transceiver (202i) of a wireless communication network, wherein the first transceiver (202i) is configured to operate in a network energy saving mode in which a network energy saving configuration is activated, wherein the first transceiver (202i) is configured to switch, in response to a reception of a control information indicating a bypass of the network energy saving configuration, into a network energy saving bypass mode for a limited time period in which network energy saving restrictions do not apply.

86. First transceiver (202i) according to claim 85, wherein the network energy saving mode is one out of a cell discontinuous transmission, DTX, activated mode, a frequency domain network energy saving mode, a spatial domain network energy saving mode, a power domain network energy saving mode.

87. First transceiver (202i) according to one of the claims 85 and 86, wherein the control information is a network energy saving mode bypass indication.

88. First transceiver (202i) according to one of the claims 85 to 87, wherein the control information indicates an activation of synchronization signal block, SSB, symbols.

89. Second transceiver (200) of a wireless communication network, wherein the second transceiver (200) is configured to operate in a network energy saving mode in which a network energy saving configuration is activated, wherein the second transceiver (200) is configured to transmit a control information to the at least one first transceiver (202i), the control information indicating a bypass of the activated network energy saving configuration, wherein the second transceiver (200) is configured to switch into a network energy saving bypass mode for a limited time period in which network energy saving restrictions do not apply.

90. Second transceiver (200) according to claim 89, wherein the network energy saving mode is one out of a cell discontinuous transmission, DTX, activated mode, a frequency domain network energy saving mode, a spatial domain network energy saving mode, a power domain network energy saving mode.

91. Second transceiver (200) according to one of the claims 89 and 90, wherein the control information is a network energy saving mode bypass indication.

92. Second transceiver (200) according to one of the claims 89 to 91 , wherein the control information indicates an activation of synchronization signal block, SSB, symbols.

93. Method for operating a first transceiver (202i) of a wireless communication network, the method comprising: operating the first transceiver (202i) in a network energy saving mode in which a network energy saving configuration is activated, switching the first transceiver (202i), in response to a reception of a control information indicating a bypass of the network energy saving configuration, into a network energy saving bypass mode for a limited time period in which network energy saving restrictions do not apply.

94. Method for operating a second transceiver (200) of a wireless communication network, the method comprising: operating the second transceiver (200) in a network energy saving mode in which a network energy saving configuration is activated, transmitting a control information to the at least one first transceiver (202i), the control information indicating a bypass of the activated network energy saving configuration, switching the second transceiver (200) into a network energy saving bypass mode for a limited time period in which network energy saving restrictions do not apply.

95. Computer program for performing a method according to one of the claims 83, 84, 92 and 93, when the computer program runs on a computer, microprocessor or software defined radio.