Patent Application
20150327187
The present disclosure relates to the field of communications, and in particular to a new Power Headroom Report (PHR) in a Device to Device (D2D) communication scheme.
In an existing cellular wireless communication system, when a user equipment (UE) communicates with another UE at other side, wherever the other UE is located, the UE needs to transmit data to be transmitted to the other UE to an eNB, and then after passing a core network, the data are transmitted by an eNB serving for the other UE to the other UE; on the contrary, data transmitted by the other UE are also transmitted via an “eNB-core network-eNB” path, and finally received by the UE via an air interface. Thus, a case will occur where two UEs exchanging data are in proximity with each other, such as in neighboring eNBs or in the same eNB, but as being limited by the existing communication scheme, the data exchanged between them are still exchange in the “eNB-core network-eNB” manner. Obviously, in a case where two UEs at opposite ends are in close proximity with each other, such a manner of exchange not only increases the burden of the core network, but also consumes more energies of the UE, as in such a case, a distance between UE and the eNB often exceeds that between two UEs, and the UE needs more energies to transmit data. Hence, in such a case, two UEs in close proximity with each other may employ a D2D communication scheme, that is, transmission and reception of data are performed directly via a D2D link between the two UEs, as shown in
Currently, when the D2D communication scheme is used, the D2D link may use an independent frequency, and may also be multiplexed in an uplink carrier in an LTE-A system together with a cellular link, as shown in
On the other hand, in the LTE-A system, as resource scheduling of an uplink and a downlink is controlled by an eNB, in order to better schedule the resources, the eNB needs the UE to report a channel condition of a link, such as reporting such information as a channel quality indicator (CQI), etc. In this way, the eNB may allocate a proper modulation coding level for the UE. And at the same time, the eNB needs to control transmission power of the UE, so as to better overcome the near-far-effect of the UE and control that the transmission power of the UE to be not exceeded than its maximum transmission power. Hence, the UE needs to report a power headroom (PH) value to the eNB, this process being referred to as power headroom report (PHR). And at the same time, the PHR may also be referenced by the eNB in allocating uplink resources and selecting a modulation coding level for the UE on the uplink. Therefore it can be seen that the PHR is obviously meaningful for reference to the eNB in scheduling resources.
In the D2D communication scheme, as D2D link resources are also controlled by the eNB, it can be foreseen that in the D2D communication scheme, the PHR is still very useful scheduling reference information to the eNB, that is, the PH value of the D2D link needs also to be reported to the eNB.
In a PHR process in the LTE-A system, the PH value is contained in a power headroom MAC control element (PH MAC CE) for being reported to an eNB by UE, in which PH values of the UE in each activated carrier are contained. If an uplink has only one carrier, a PH value of the unique uplink carrier is contained, which may be configured according to the system, and in the PH MAC CE format shown in
In particular, in
Ci: in a first byte of the control element, a Ci position corresponds to a secondary cell defined by the system (that is, each Ci corresponds to a secondary cell one by one), and its value denotes whether a PH value of a cellular link of the secondary cell to which it corresponds exists. When its value is “1”, it shows that the PH value of the corresponding secondary cell will occur; and when its value is “0”, it shows that the PH value of the corresponding secondary cell will not occur. And at the same time, an occurrence order of PH values of cellular links of different secondary cells is identical to an occurrence order of Cis to which the secondary cells correspond. For a primary cell (PCell), its PH value certainly occurs, and occurs earliest. The primary cell has two types of PH values, type 1 and type 2. The PH value of type 1 of the primary cell certainly occurs, and whether the PH value of type 2 occurs is configured by a high layer of the system. Only one type PH value of the secondary cell (SCell) will occur, that is, a PH value of type 1. And if the uplink has only one carrier, only a PH value of a cellular link of the primary cell will occur in a PH MAC CE.
V bit: it may be used to indicate whether a corresponding PH value is a real PH value or a virtual PH value. For example, V=1 denotes that the corresponding PH value is real, and V=0 denotes that the corresponding PH value is virtual. And at the same time, it is also used to indicate whether a corresponding PCMAX,c will occur; wherein V=1 denotes that a PCMAX,c will occur, that is, the UE reports the PCMAX,c only when the corresponding PH value is a real value, and V=0 denotes that a PCMAX,c will not occur, that is, the UE does not report the PCMAX,c when the corresponding PH value is virtual.
PCMAX,c: if it occurs, it indicates a related parameter used by the UE side in calculating a PH value.
P bit: it is used to indicate whether the UE uses power back-off due to power management. Assuming that there exists no power back-off due to use of power management, the value of the corresponding PCMAX,c will be different, and at this moment, the UE should set the P bit as 1.
R bit: a reserved bit.
It was found by the inventors in the implementation of the present disclosure that in the PHR process of the D2D communication scheme, if the original PH MAC CE format in the LTE-A system is still followed, there is only one link PH value corresponding to each carrier, that is, there is only the PH value of the cellular link; and if the D2D link and the cellular link are dynamically multiplexed in an uplink carrier of the LTE-A system, following problems will occur:
Furthermore, there are many triggering conditions for the PHR, such as periodic triggering and event triggering. The periodic triggering can ensure that it would not happen that an eNB does not receive the PHR in long period of time, and the event triggering ensures that the eNB can obtain the PHR punctually when certain events seriously affecting eNB scheduling occur, without needing to obtain the PHR only after the current period in the periodic triggering is completed. Following four cases exist in the event triggering condition:
In the implementation of the present disclosure, the inventors found that in the above four time triggering conditions, the change of the pathloss of the serving cell for pathloss reference is mainly taken into account in triggering condition 1. It should be noted that the serving cell here refers to a cellular link. While in the D2D communication scheme, the pathloss reference is the cellular link no longer, and it should be a reference signal in the D2D link, with its characteristic being possibly different from that of the pathloss reference signal of the cellular link; furthermore, it is obvious that the length of the D2D link is near relative to the cellular link, and the same distance of a change of its link length has more effect on the pathloss than that of the cellular link. Therefore, in order to reflect a change of pathloss of the D2D link, following the triggering condition in the triggering conditions 1 will be less suitable, and new triggering conditions are needed to be defined.
It should be noted that the above description of the background is merely provided for clear and complete explanation of the present disclosure and for easy understanding by those skilled in the art. And it should not be understood that the above technical solution is known to those skilled in the art as it is described in the background of the present disclosure.
An object of the embodiments of the present disclosure is to provide a method and apparatus for reporting power headroom, so that UE may report power headroom of a D2D link to an eNB accurately and/or punctually.
According to a first aspect of the embodiments of the present disclosure, there is provided a method for reporting power headroom, including:
According to a second aspect of the embodiments of the present disclosure, there is provided a method for reporting power headroom, including:
According to a third aspect of the embodiments of the present disclosure, there is provided a method for reporting power headroom, including:
According to a fourth aspect of the embodiments of the present disclosure, there is provided a method for determining power headroom, including:
According to a fifth aspect of the embodiments of the present disclosure, there is provided a method for determining power headroom, including:
According to a sixth aspect of the embodiments of the present disclosure, there is provided a method for determining power headroom, including:
According to a seventh aspect of the embodiments of the present disclosure, there is provided user equipment, including:
According to an eighth aspect of the embodiments of the present disclosure, there is provided user equipment, including:
According to a ninth aspect of the embodiments of the present disclosure, there is provided user equipment, including:
According to a tenth aspect of the embodiments of the present disclosure, there is provided an eNB, including:
According to an eleventh aspect of the embodiments of the present disclosure, there is provided an eNB, including:
According to a twelfth aspect of the embodiments of the present disclosure, there is provided an eNB, including:
According to a thirteenth aspect of the embodiments of the present disclosure, there is provided a communication system, including the UE as described in the seventh aspect and the eNB as described in the tenth aspect, or including the UE as described in the eighth aspect and the eNB as described in the eleventh aspect, or including the UE as described in the ninth aspect and the eNB as described in the twelfth aspect.
According to another aspect of the embodiments of the present disclosure, there is provided a computer-readable program, wherein when the program is executed in an eNB, the program enables a computer to carry out the method for determining power headroom as described in any one of the fourth, fifth and sixth aspects in the eNB.
According to a further aspect of the embodiments of the present disclosure, there is provided a storage medium in which a computer-readable program is stored, wherein the computer-readable program enables a computer to carry out the method for determining power headroom as described in any one of the fourth, fifth and sixth aspects in an eNB.
According to still another aspect of the embodiments of the present disclosure, there is provided a computer-readable program, wherein when the program is executed in terminal equipment, the program enables a computer to carry out the method for reporting power headroom as described in any one of the first, second and third aspects in the terminal equipment.
According to yet another aspect of the embodiments of the present disclosure, there is provided a storage medium in which a computer-readable program is stored, wherein the computer-readable program enables a computer to carry out the method for reporting power headroom as described in any one of the first, second and third aspects in terminal equipment.
An advantage of the embodiments of the present disclosure exists in that with the method and apparatus of the embodiments, the UE may accurately and/or punctually report power headroom of the D2D link to the eNB. Therefore, the eNB may schedule the resources of the D2D link and the cellular link more flexibly.
With reference to the following description and drawings, the particular embodiments of the present disclosure are disclosed in detail, and the principle of the present disclosure and the manners of use are indicated. It should be understood that the scope of the embodiments of the present disclosure is not limited thereto. The embodiments of the present disclosure contain many alternations, modifications and equivalents within the scope of the terms of the appended claims.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments.
It should be emphasized that the term “comprises/comprising/includes/including” when used in this specification is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.
Many aspects of the disclosure can be better understood with reference to the following drawings. The components in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the present disclosure. To facilitate illustrating and describing some parts of the disclosure, corresponding portions of the drawings may be exaggerated or reduced in size. Elements and features depicted in one drawing or embodiment of the disclosure may be combined with elements and features depicted in one or more additional drawings or embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views and may be used to designate like or similar parts in more than one embodiment. In the drawings:
The foregoing and other features of the embodiments of the present disclosure will become apparent with reference to the accompanying drawings and the following description. There embodiments are illustrative only, and are not intended to limit the present disclosure. In order that the principle and embodiments of the present disclosure to be understood by those skilled in the art, the embodiments of the present disclosure shall be described taking that a D2D link is multiplexed with a cellular link in an uplink carrier of an LTE-A system as an example. However, it should be understood that the embodiments of the present disclosure are not limited to the above scenario, and are applicable to other scenarios related to PHR.
An embodiment of the present disclosure provides a method for reporting power headroom.
In this embodiment, the power headroom report message is a PH MAC CE. The PH MAC CE includes not only the PH value of the D2D link but also the PH value of the cellular link. A terminal (i.e. the UE) is permitted to simultaneously report the PH values of the D2D link and the cellular link multiplexed in the same carrier in one PH MAC CE. When the PHR is triggered, the terminal will report the PH value of the D2D link and the PH value of the cellular link in turn at a position to which this carrier corresponds.
In this embodiment and other embodiments, description is given mainly to the link type and indication manner, etc. of the PH value in the related information of the carrier of the D2D link being multiplexed in the power headroom report message. The existing standards may be referred to for other contents in the power headroom report message identical to the existing standards, which are incorporated herein, and shall not be described herein any further. That is to say, the power headroom report message includes the related information, such as the PH values of the carriers, and the present disclosure is mainly directed to the carrier multiplexed with the D2D link, and describes the link type and indication manner, etc. of the PH value in the related information of the carrier multiplexed with the D2D link. Hence, except otherwise specified, the description of the PH value of the D2D link and the PH value of the cellular link related to the embodiments of the present disclosure is based on this.
In this embodiment, positions of the above two PH values in the PH MAC CE are fixed, and their orders may be predetermined via system configuration. For example, in the PH MAC CE, the PH value of the D2D link occurs first, and then the PH value of the cellular link occurs, vice versa.
In an implementation of this embodiment, the uplink has only one carrier. In this implementation, the PH MAC CE may be configured as a structure shown in
In another implementation of this embodiment, the uplink has at least one carrier. For example, the uplink has one carrier, or the uplink has multiple carriers. And in this implementation, if the D2D link is multiplexed in the carrier of the primary cell, the PH MAC CE may be configured as a structure shown in
In this implementation, if the terminal has multiple D2D links, the multiple D2D links may be multiplexed in the uplink carriers of the primary cell and the secondary cell at the same time or may be multiplexed in the uplink carriers of multiple secondary cells at the same time. When the multiple D2D links are multiplexed in the uplink carriers of the primary cell and the secondary cell at the same time, the PH MAC CE may be configured as having the characteristics of
As shown in
As shown in
Alternatively, in the implementations shown in
In this embodiment, an existing PHR triggering condition (i.e. a reporting condition of PH) may be followed; however, in order to better reflect a signal characteristic of the D2D link, a new triggering condition may be defined for the PHR. For example, the reporting condition of the PH may be defined as: when a prohibit PHR timer expires or has expired, the terminal has uplink resources for transmitting new data, and for any activated serving cell being multiplexed with D2D link, pathloss of D2D link thereof has changed and exceeds a predefined threshold value, the PHR is triggered; that is, the UE is triggered to transmit the above power headroom report message to the eNB.
With the method of this embodiment, the UE may accurately and/or punctually report power headroom of the D2D link to the eNB. Therefore, the eNB may schedule the resources of the D2D link and the cellular link more flexibly and effectively.
An embodiment of the present disclosure further provides a method for determining power headroom. This method corresponds to the method for reporting power headroom of Embodiment 1, and in which when UE reports PH values to an eNB according to the method of Embodiment 1, the eNB determines according to the method of this embodiment which of the power headroom values reported by the UE and corresponding to an uplink carrier is a PH value of the D2D link, and which is/are PH value(s) of the cellular link.
In this embodiment, the power headroom report message is the PH MAC CE described in Embodiment 1.
In this embodiment, as the system configures an order of the PH value of the D2D link and the PH value of the cellular link in the PH MAC CE in advance, when the eNB receives the PH MAC CE, it may determine according to the system configuration which of the all the PH values in the PH MAC CE are the PH values of the D2D link and which are the PH values of the cellular link.
For example, taking the structure of the PH MAC CE shown in
For another example, taking the structure of the PH MAC CE shown in
For a further example, taking the structure of the PH MAC CE shown in
When there are multiple D2D links multiplexed in uplink carriers of multiple cells, as the eNB knows the cells of which the uplink carriers being multiplexed with the D2D links, it may determine according to the system configuration that in the PH values to which the uplink carriers of these cells correspond, whether the PH values of the cellular link are in the front, or the PH values of the D2D link are in the front.
With the method of this embodiment, the UE may accurately and/or punctually report power headroom of the D2D link to the eNB. Therefore, the eNB may schedule the resources of the D2D link and the cellular link more flexibly and effectively.
An embodiment of the present disclosure further provides a method for reporting power headroom.
In this embodiment, the PH value indication information may be one, two or more, and this embodiment is not limited thereto. Furthermore, a value of the PH value indication information and a link type of a PH value indicated by the PH value indication information may be pre-configured by the system. For example, the system may pre-configure that the PH value indication information is denoted by “D”, and D=1 is used to indicate that the PH value to which it corresponds is the PH value of the D2D link, and D=0 is used to indicate that the PH value to which it corresponds is the PH value of the cellular link.
In this embodiment, the power headroom report message is a PH MAC CE. The PH MAC CE includes not only the PH value of the D2D link but also the PH value of the cellular link. A terminal (i.e. the UE) is permitted to simultaneously report the PH values of the D2D link and the cellular link multiplexed in the same carrier in one PH MAC CE. When the PHR is triggered, the terminal will report the PH value of the D2D link and the PH value of the cellular link in turn at a position to which this carrier corresponds.
Different from Embodiment 1, in this embodiment, relative positions of the PH value of the D2D link and the PH value of the cellular link in the PH MAC CE are not fixed, but are flexibly configured by the system. In this embodiment, the system pre-configures one piece of indication information (referred to as PH value indication information) to indicate a link type of a PH value reported by it. For example, the indication information may be carried out by a reserved bit (R) in the PH MAC CE, and the reserved bit is used to indicate whether a PH value to which it corresponds is a PH value of a D2D link or a PH value of a cellular link. Hence, an order of the PH value of the D2D link and the PH value of the cellular link may be configured flexibly.
In an implementation of this embodiment, the uplink has only one carrier. In this implementation, the PH MAC CE may be configured as a structure shown in
In another implementation of this embodiment, the uplink has at least one carrier; for example, the uplink has one carrier, or the uplink has multiple carriers. And in this implementation, if the D2D link is multiplexed in an uplink carrier of a primary cell, the PH MAC CE may be configured as a structure shown in
As shown in
As shown in
When there are multiple D2D links multiplexed in uplink carriers of multiple cells, as the eNB knows the cells of which the uplink carriers being multiplexed with the D2D links, it may judge according to the PH value indication information “D” to which each uplink carrier multiplexed with a D2D link corresponds whether the PH value to which the PH value indication information “D” corresponds is a PH value of a D2D link or a PH value of a cellular link.
Alternatively, in the implementations shown in
In this embodiment, a reporting condition of PH is identical to that of Embodiment 1, and an existing PHR triggering condition (i.e. a reporting condition of PH) may be followed; however, in order to better reflect a signal characteristic of the D2D link, a new triggering condition may be defined for the PHR. For example, the reporting condition of PH may be defined as: when a prohibit PHR timer expires or has expired, the terminal has uplink resources for transmitting new data, and for any activated serving cell being multiplexed with D2D link, pathloss of D2D link thereof has changed and exceeds a predefined threshold value, the PHR is triggered; that is, the UE is triggered to transmit the above power headroom report message to the eNB.
With the method of this embodiment, the UE may accurately and/or punctually report power headroom of the D2D link to the eNB. Therefore, the eNB may schedule the resources of the D2D link and the cellular link more flexibly and effectively.
An embodiment of the present disclosure further provides a method for determining power headroom. This method corresponds to the method for reporting power headroom of Embodiment 3, and in which when UE reports PH values to an eNB according to the method of Embodiment 3, the eNB determines according to the method of this embodiment which of the power headroom values reported by the UE and corresponding to an uplink carrier is a PH value of the D2D link, and which is/are PH value(s) of the cellular link.
In this embodiment, the PH value indication information may be one, two or more, and this embodiment is not limited thereto.
In this embodiment, the power headroom report message is the PH MAC CE as described in Embodiment 3.
In this embodiment, as the system configures the PH value indication information and the link type of the PH value to which it corresponds and indicated by it in advance, when the eNB receives the PH MAC CE, it may determine the link type of the PH value to which the PH value indication information corresponds according to the PH value indication information, and hence determine which of the all the PH values in the received PH MAC CE are the PH values of the D2D link and which are the PH values of the cellular link.
For example, taking the structure of the PH MAC CE shown in
For another example, taking the structure of the PH MAC CE shown in
For a further example, taking the structure of the PH MAC CE shown in
When there are multiple D2D links multiplexed in uplink carriers of multiple cells, as the eNB knows the cells of which the uplink carriers being multiplexed with the D2D links, it may judge according to the PH value indication information “D” to which each uplink carrier multiplexed with a D2D link corresponds whether the PH value to which the PH value indication information “D” corresponds is a PH value of a D2D link or a PH value of a cellular link.
With the method of this embodiment, the UE may accurately and/or punctually report power headroom of the D2D link to the eNB. Therefore, the eNB may schedule the resources of the D2D link and the cellular link more flexibly and effectively.
An embodiment of the present disclosure further provides a method for reporting power headroom.
In this embodiment, the power headroom report message is a PH MAC CE. And a terminal is only permitted to report a PH value of one link multiplexed in the same carrier in one PH MAC CE, that is, it is either a PH value of a D2D link or a PH value of a cellular link.
In this embodiment, the system configures one piece of PH value indication information in advance to indicate a link type of the PH value to which it corresponds. When the PHR is triggered, the terminal may use the pre-configured indication information (referred to as PH value indication information) to indicate a link type of the PH value. For example, a reserved bit in the current PH MAC CE is used to indicate whether a corresponding PH value is a PH value of a D2D link or a PH value of a cellular link. In this way, the eNB may definitely know a link type to which a received PH value corresponds.
In an implementation of this embodiment, the uplink has only one carrier. In this implementation, the PH MAC CE may be configured as a structure shown in
In another implementation of this embodiment, the uplink has at least one carrier. For example, the uplink has one carrier, or the uplink has multiple carriers. And in this implementation, if the D2D link is multiplexed in the carrier of the primary cell, the PH MAC CE may be configured as a structure shown in
As shown in
As shown in
When there are multiple D2D links multiplexed in uplink carriers of multiple cells, as the eNB knows the cells of which the uplink carriers being multiplexed with the D2D links, it may judge according to the PH value indication information “D” to which each uplink carrier multiplexed with a D2D link corresponds whether the PH value to which the PH value indication information “D” corresponds is a PH value of a D2D link or a PH value of a cellular link.
Alternatively, in the implementations shown in
In this embodiment, a reporting condition of PH is identical to those of Embodiment 1 and Embodiment 3, and an existing PHR triggering condition (i.e. a reporting condition of PH) may be followed; however, in order to better reflect a signal characteristic of the D2D link, a new triggering condition may be defined for the PHR. For example, the reporting condition of PH may be defined as: when a prohibit PHR timer expires or has expired, the terminal has uplink resources for transmitting new data, and for any activated serving cell being multiplexed with D2D link, pathloss of D2D link thereof has changed and exceeds a predefined threshold value, the PHR is triggered; that is, the UE is triggered to transmit the above power headroom report message to the eNB.
With the method of this embodiment, the UE may accurately and/or punctually report power headroom of the D2D link to the eNB. Therefore, the eNB may schedule the resources of the D2D link and the cellular link more flexibly and effectively.
An embodiment of the present disclosure further provides a method for determining power headroom. This method corresponds to the method for reporting power headroom of Embodiment 5, and in which when UE reports PH values to an eNB according to the method of Embodiment 5, the eNB determines a link type of a power headroom value reported by the UE according to the method of this embodiment.
In this embodiment, the power headroom report message is the PH MAC CE as described in Embodiment 5.
In this embodiment, as the system configures the PH value indication information used for indicating a link type of the reported PH value in advance, when the eNB receives the PH MAC CE, it may determine the link type of the PH value to which the PH value indication information corresponds according to the PH value indication information.
For example, taking the structure of the PH MAC CE shown in
For another example, taking the structure of the PH MAC CE shown in
For a further example, taking the structure of the PH MAC CE shown in
When there are multiple D2D links multiplexed in uplink carriers of multiple cells, as the eNB knows the cells of which the uplink carriers being multiplexed with the D2D links, it may judge according to the PH value indication information “D” to which each uplink carrier multiplexed with a D2D link corresponds whether the PH value to which the PH value indication information “D” corresponds is a PH value of a D2D link or a PH value of a cellular link.
With the method of this embodiment, the UE may accurately and/or punctually report power headroom of the D2D link to the eNB. Therefore, the eNB may schedule the resources of the D2D link and the cellular link more flexibly and effectively.
An embodiment of the present disclosure further provides UE, as described in Embodiment 7 below. As the principle of the UE for solving problems is similar to that of the method of Embodiment 1, the implementation of the method of Embodiment 1 may be referred to for the implementation of the UE, and the repeated parts shall not be described herein any further.
An embodiment of the present disclosure provides UE.
In this embodiment, the power headroom report message is a PH MAC CE.
In this embodiment, the report condition of PH is that:
With the UE of this embodiment, power headroom of the D2D link may be accurately and/or punctually reported to the eNB. Therefore, the eNB may schedule the resources of the D2D link and the cellular link more flexibly and effectively.
An embodiment of the present disclosure further provides an eNB, as described in Embodiment 8 below. As the principle of the eNB for solving problems is similar to that of the method of Embodiment 2, the implementation of the method of Embodiment 2 may be referred to for the implementation of the eNB, and the repeated parts shall not be described herein any further.
An embodiment of the present disclosure provides an eNB.
In this embodiment, the power headroom report message is a PH MAC CE.
With the eNB of this embodiment, the resources of the D2D link and the cellular link may be scheduled more flexibly and efficiently.
An embodiment of the present disclosure further provides UE, as described in Embodiment 9 below. As the principle of the UE for solving problems is similar to that of the method of Embodiment 3, the implementation of the method of Embodiment 3 may be referred to for the implementation of the UE, and the repeated parts shall not be described herein any further.
An embodiment of the present disclosure provides UE.
In this embodiment, the power headroom report message is a PH MAC CE.
In this embodiment, the report condition of PH is that:
With the UE of this embodiment, power headroom of the D2D link may be accurately and/or punctually reported to the eNB. Therefore, the eNB may schedule the resources of the D2D link and the cellular link more flexibly and effectively.
An embodiment of the present disclosure further provides an eNB, as described in Embodiment 10 below. As the principle of the eNB for solving problems is similar to that of the method of Embodiment 4, the implementation of the method of Embodiment 4 may be referred to for the implementation of the eNB, and the repeated parts shall not be described herein any further.
An embodiment of the present disclosure provides an eNB.
In this embodiment, the power headroom report message is a PH MAC CE.
With the eNB of this embodiment, the resources of the D2D link and the cellular link may be scheduled more flexibly and efficiently.
An embodiment of the present disclosure further provides UE, as described in Embodiment 11 below. As the principle of the UE for solving problems is similar to that of the method of Embodiment 5, the implementation of the method of Embodiment 5 may be referred to for the implementation of the UE, and the repeated parts shall not be described herein any further.
An embodiment of the present disclosure provides UE.
In this embodiment, the power headroom report message is a PH MAC CE.
In this embodiment, the report condition of PH is that:
With the UE of this embodiment, power headroom of the D2D link may be accurately and/or punctually reported to the eNB. Therefore, the eNB may schedule the resources of the D2D link and the cellular link more flexibly and effectively.
An embodiment of the present disclosure further provides an eNB, as described in Embodiment 12 below. As the principle of the eNB for solving problems is similar to that of the method of Embodiment 6, the implementation of the method of Embodiment 6 may be referred to for the implementation of the eNB, and the repeated parts shall not be described herein any further.
An embodiment of the present disclosure provides an eNB.
In this embodiment, the power headroom report message is a PH MAC CE.
With the eNB of this embodiment, the resources of the D2D link and the cellular link may be scheduled more flexibly and efficiently.
An embodiment of the present disclosure further provides a communication system, including the UE as described in Embodiment 7 and the eNB as described in Embodiment 8, or including the UE as described in Embodiment 9 and the eNB as described in Embodiment 10, or including the UE as described in Embodiment 11 and the eNB as described in Embodiment 12.
An embodiment of the present disclosure further provides a computer-readable program, wherein when the program is executed in an eNB, the program enables a computer to carry out the method for determining power headroom as described in Embodiment 2, or 4 or 6 in the eNB.
An embodiment of the present disclosure further provides a storage medium in which a computer-readable program is stored, wherein the computer-readable program enables a computer to carry out the method for determining power headroom as described in Embodiment 2, or 4 or 6 in an eNB.
An embodiment of the present disclosure further provides a computer-readable program, wherein when the program is executed in terminal equipment, the program enables a computer to carry out the method for reporting power headroom as described in Embodiment 1, or 3 or 5 in the terminal equipment.
An embodiment of the present disclosure further provides a storage medium in which a computer-readable program is stored, wherein the computer-readable program enables a computer to carry out the method for reporting power headroom as described in Embodiment 1, or 3 or 5 in terminal equipment.
The above apparatuses and methods of the present disclosure may be implemented by hardware, or by hardware in combination with software. The present disclosure relates to such a computer-readable program that when the program is executed by a logic device, the logic device is enabled to carry out the apparatus or components as described above, or to carry out the methods or steps as described above. The present disclosure also relates to a storage medium for storing the above program, such as a hard disk, a floppy disk, a CD, a DVD, and a flash memory, etc.
The present disclosure is described above with reference to particular embodiments. However, it should be understood by those skilled in the art that such a description is illustrative only, and not intended to limit the protection scope of the present disclosure. Various variants and modifications may be made by those skilled in the art according to the principle of the present disclosure, and such variants and modifications fall within the scope of the present disclosure.
This application is a continuation application of International Application PCT/CN2013/070579 filed on Jan. 17, 2013, the entire contents of which are incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2013/070579 | Jan 2013 | US |
| Child | 14800951 | US |
