CN101729108B - Method and device for reporting power margin information - Google Patents

Method and device for reporting power margin information Download PDF

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Publication number
CN101729108B
CN101729108B CN 200810225501 CN200810225501A CN101729108B CN 101729108 B CN101729108 B CN 101729108B CN 200810225501 CN200810225501 CN 200810225501 CN 200810225501 A CN200810225501 A CN 200810225501A CN 101729108 B CN101729108 B CN 101729108B
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described
mac pdu
ph
ue
information
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CN 200810225501
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CN101729108A (en
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许芳丽
谌丽
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电信科学技术研究院
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Abstract

The invention provides a method and a device for reporting power margin information. The method comprises the following step that: user equipment (UE) informs a base station of the PH information by using residual bits in a media access control sub-layer protocol data unit (MACPDU) when the number of the residual bits in the MACPDU sent to the base station by the UE is greater than or equal to the number of the bits occupied by the PH information and when the MACPDU does not include corresponding PH information sent this time. The method and the device for reporting power margin information can enable the base station to know practical power margin information of the UE in time so as to enhance the uniformity of the base station and the UE for understanding the PH information.

Description

A kind of method and apparatus of reporting power margin information

Technical field

The present invention relates to the power control techniques in the mobile communication system, particularly relate to the method and apparatus of a kind of reporting power margin (PH) information.

Background technology

In existing Long Term Evolution (LTE) system, PH information is the information for sign UE side power headroom.This information is obtained according to formula PH=Pmax-Ppusch by UE.Wherein, PH is power headroom, and Pmax is the maximum transmission power of UE, and Ppusch is the employed power of Uplink Shared Channel (PUSCH) that carries this PH information.In the practical application, command word is adjusted in the TPC power control of the PUSCH channel that UE can produce according to physical layer, and this Ppusch is adjusted.Here, it mainly is to be compared according to its desired value of actual RST that receives and systemic presupposition on the up PUSCH channel of UE by the base station to produce that command word is adjusted in the TPC power control, if the actual signal that receives is lower than desired value, then the base station can be adjusted command word notice UE by the TPC power control and raise transmitting power, its transmitting power of corresponding raising when at this moment, UE will transmit at the PUSCH in the correspondence moment; If the actual signal of reception is higher than desired value, the base station then can be passed through the TPC power control and adjust command word notice UE downward modulation transmitting power, at this moment, and its transmitting power of corresponding reduction when UE will transmit at the PUSCH in the correspondence moment.

After the PH information that UE obtains according to the method described above, will report base station side according to certain mechanism that reports.When the MAC sublayer (MAC) of base station side is dispatched when distributing with resource subscriber equipment (UE), need to consider that the power margin information of this UE side is the size of pH value, the resource desired power of this UE distribution is not exceeded the maximum transmission power of UE to guarantee MAC.If the understanding to PH between UE and the base station is consistent inadequately, will have influence on the base station so to the resource distribution of UE and the accuracy of power demand.For example, the power headroom of this UE that base station side is preserved is higher than the corresponding power headroom constantly of UE side, the possibility base station for the base station, is the maximum transmission power that does not exceed this UE for the required power of PUSCH resource that this UE distributes so, but, for UE, may exceed the maximum transmission power of this UE, in this case, owing to be subject to the maximum transmission power of UE, corresponding power just can't reach the expection requirement of network during the actual transmission of UE PUSCH data.Otherwise, if the power headroom of this UE that the base station is understood is lower than the power headroom of UE reality, may occurs network so and also with a hook at the end for UE for the resource that this UE distributes, will cause the single transmission throughput of UE can't reach maximization thus.As seen, the accuracy of the PH information that safeguard the base station, namely the consistency of between UE and the base station PH being understood will have a significant impact distributing rationally of resource.

At present, UE is that power headroom control unit (PH CE) by (MAC PDU) in the Medium Access Control (MAC) Protocol Data Unit reports the base station with PH information.MAC PDU in the existing protocol mainly comprises following a few part: MAC PDU head, 0 or a plurality of MAC service data unit (MAC SDU), 0 or a plurality of MAC Control Element (MAC CE).Wherein, MAC PDU head comprises one or more MAC PDU heads again, corresponding 1 the MAC SDU of each MAC PDU head or 1 MAC CE or filling bit.The MAC CE that comprises PH information is called as PH CE, and correspondingly, MAC PDU of this MAC CE correspondence head is the MAC PDU head of this PH CE correspondence, and in addition, the length of 1 PH CE and its corresponding MAC PDU head is 8 bits.In prior protocols, the size of the up MAC PDU that UE sends is directly to authorize appointment by the base station, if the data (content that comprises MAC CE and MAC SDU) that actual UE will send are less than the size of this appointment, then will consider whether the buffer status indication control unit (BSR CE) (the data cached situation of the Buffer of UE) of filling type is arranged, fill after the BSR CE of type if comprised, also have remaining bits, then can adopt the mode of filling bit to satisfy the MAC PDU length that will send.

Existing triggering UE reports the method for PH information to have to the base station following several:

1, the path loss amplitude of variation that records as UE reaches default thresholding, and report and forbid timer expiry, when having uplink authorization to send data simultaneously, UE will trigger and report PH information to give the base station, and this reports forbids that timer is used to limit the time of forbidding reporting PH information;

2, set in advance the PH report cycle, when a PH report cycle expired, when having uplink authorization to send data simultaneously, UE will trigger and report PH information to give the base station.

In the above-mentioned method that reports PH information, if the default thresholding setting of described path loss amplitude of variation is bigger, when perhaps the setting of described PH report cycle was long, the base station obtains twice interval between the PH information may be long.And in this long time interval, base station and UE will safeguard the PH information of preserving separately respectively, because base station side may be adjusted the transmitting power of UE by TPC power control adjustment command word during this period, and may there be mistake in this TPC power control adjustment command word in actual transmissions, it is inconsistent to cause UE to adjust the Ppusch that Ppusch that the command word adjustment obtains and base station understands according to the TPC power control of mistake, correspondingly, the PH that obtains according to the Ppusch that understands separately of base station and UE is also with inconsistent.

This shows that the method for the existing PH of reporting information may cause the base station and understanding differently of the PH information of UE causes.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method and apparatus of the PH of reporting information, can improve the consistency of the PH comprehension of information of base station and UE.

In order to achieve the above object, the technical scheme of the present invention's proposition is:

The method of reporting power margin information provided by the present invention comprises:

The bit number that remaining bits number in the MAC PDU that UE sends to the base station takies more than or equal to PH information, and when not comprising the PH information of this transmission correspondence among the described MAC PDU, described UE utilizes the remaining bits among the described MAC PDU, and described PH information is notified to described base station.

Preferably, described method further comprises:

The path loss amplitude of variation that records as UE reaches default thresholding, and reports when forbidding that timer expiry and described UE can be sent data by uplink authorization, and described UE sends and carries the MAC PDU of PH information to the base station.

Preferably, described method further comprises: when default PH report cycle expires, and described UE be can be sent data by uplink authorization the time, and described UE sends and carries the MAC PDU of PH information to the base station.

Preferably, when described remaining bits number during more than or equal to the length of the PH CE that is used for depositing described PH information, described PH CE is located at after the valid data part or last the MAC CE among the described MAC PDU among the described MAC PDU.

Preferably, when described remaining bits number during more than or equal to the length sum of described PH CE MAC PDU corresponding with it head, described MAC PDU head is located at after MAC PDU of last MAC CE correspondence among among the described MAC PDU last MAC PDU or the described MAC PDU.

The device of reporting power margin information provided by the invention comprises:

The protocol Data Unit generation module, be used for generating MAC PDU, export it to protocol Data Unit sending module, and the bit number that takies more than or equal to PH information of the remaining bits number in described MAC PDU, and when not comprising the PH information of this transmission correspondence among the described MAC PDU, described PH information is deposited among the described MAC PDU;

The protocol Data Unit sending module is used for and will sends to the base station from the MAC PDU of agreement data cell generation module.

Preferably, described protocol Data Unit generation module is further used for reaching default thresholding when the path loss amplitude of variation that UE records, and report when forbidding that timer expiry and described UE can be sent data by uplink authorization, generate and carry the MAC PDU of PH information and be sent to the protocol Data Unit sending module.

Preferably, described protocol Data Unit generation module is further used for expiring when default PH report cycle, and described UE generates and carries the MAC PDU of PH information and be sent to the protocol Data Unit sending module can be sent data by uplink authorization the time.

Preferably, described protocol Data Unit generation module is further used for when described remaining bits number during more than or equal to the length of the PH CE that is used for depositing described PH information described PH CE being located at described MAC

After the valid data part or last MAC CE among the PDU.

Preferably, described protocol Data Unit generation module is further used for when described remaining bits number during more than or equal to the length sum of described PH CE MAC PDU corresponding with it head, described MAC PDU head is located at after among the described MAC PDU last MAC PDU or last MAC CE correspondence MAC PDU.

In sum, a kind of method and apparatus that reports PH information that the present invention proposes, exist the MAC PDU of filling bit to carry the corresponding PH information of the current transmission data of UE by utilization, make the base station can in time know the actual power balance information of UE, thereby can improve the consistency of base station and the PH comprehension of information of UE.

Description of drawings

The structural representation of Fig. 1 for installing in the embodiment of the invention.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.

Main thought of the present invention is: consistent with the actual power balance information of UE side for the power margin information that guarantees the UE that safeguard the base station as far as possible, the UE needs in time send to the base station with the PH information of self as much as possible.For this reason, the present invention proposes to utilize the MAC PDU that has remaining bits to carry the corresponding PH information of the current transmission data of UE, there is transfer of data as long as make, the actual power balance information of UE just might be known in the base station, thereby make the base station can in time know the actual power balance information of UE as much as possible, to improve the accuracy of the PH information of being safeguarded the base station, also can avoid the resource overhead that produces when UE needs specially PH information to be reported the base station in the prior art simultaneously.

The embodiment one of the inventive method mainly may further comprise the steps:

The bit number that step 101, the remaining bits number in the MAC PDU that UE sends to the base station take more than or equal to PH information, and when not comprising the PH information of this transmission correspondence among the described MAC PDU, described UE utilizes the remaining bits of described MAC PDU, will send corresponding PH information with this and be notified to described base station.

After having placed the BSR CE information and corresponding MAC PDU header of all valid data, filling among the MAC PDU that described remaining bits refers in preset length, the bit that is not filled, this partial bit is filled by filling bit in existing protocol.

Here, described PH information is normally carried by the PH CE among the MAC PDU, therefore, usually only the remaining bits in MAC PDU allows to place under the situation of 1 PH CE at least, this MAC PDU just can carry described PH information, that is to say, during bit number that the remaining bits number among the MAC PDU that UE described in this step sends to the base station takies more than or equal to PH information be: the remaining bits number among the described MAC PDU is more than or equal to the length of the PH control unit PH CE that is used for depositing described PH information, at this moment, this MAC PDU will carry described PH CE.In the specific implementation, this PH CE can directly be serially connected with after the valid data part among the described MAC PDU, also can be serially connected with after last the MAC CE among the described MAC PDU, when MACPDU is received in the base station, detect described PH information in above-mentioned position and get final product.

In addition, when described remaining bits number during more than or equal to the length sum of described PH CE MAC PDU corresponding with it head, described MAC PDU can also further carry the sub-head of MACPDU of described PH CE correspondence, like this, after MAC PDU is received in the base station, just can from MAC PDU, find this PH information according to the indication of this MAC PDU head, thereby can further promote between UE and the NB consistency to the PH comprehension of information.In addition, in the specific implementation, this MAC PDU head can be located at after the MAC PDU head of last the MAC CE correspondence among the described MAC PDU, also can be located at after last the MAC PDU head among the described MAC PDU.

Preferably, step 101 can also combine with the consistency of further raising base station and the PH comprehension of information of UE with one or more methods of the existing PH of reporting information, and for example the present invention can further include:

The path loss amplitude of variation that records as UE reaches default thresholding, and reports and forbid timer expiry, and when described UE can be sent data by uplink authorization simultaneously, described UE sent and carries the MAC PDU of PH information to the base station; Perhaps,

When default PH report cycle expires, when described UE can be sent data by uplink authorization simultaneously, described UE sent and carries the MAC PDU of PH information to the base station.

Like this; namely use in opposite extreme situations in full reportedly defeated busy and cause the MAC PDU that sends in a period of time, can not carry PH information; utilize the trigger mechanism of the existing PH of reporting information; still can make UE in time PH information be reported the base station, thereby further guarantee the consistency of base station and the PH comprehension of information of UE.

More than the method for the reporting power margin information in the embodiment of the invention is described in detail, again the device of the reporting power margin information in the embodiment of the invention is described in detail below.

Fig. 1 is the structural representation of the device of reporting power margin information in the embodiment of the invention.As shown in Figure 1, this device comprises: protocol Data Unit generation module 101 and protocol Data Unit sending module 102.

Wherein, protocol Data Unit generation module 101, be used for generating MAC PDU, export it to protocol Data Unit sending module 102, and the bit number that takies more than or equal to PH information of the remaining bits number in described MAC PDU, and when not comprising the PH information of this transmission correspondence among the described MAC PDU, described PH information is deposited in the remaining bits of described MAC PDU;

Protocol Data Unit sending module 102 is used for and will sends to the base station from the MACPDU of agreement data cell generation module 101.

Preferably, described protocol Data Unit generation module 101 is further used for reaching default thresholding when the path loss amplitude of variation that UE records, and report when forbidding that timer expiry and described UE can be sent data at this moment by uplink authorization, generate and carry the MAC PDU of PH information and be sent to protocol Data Unit sending module 102;

Preferably, described protocol Data Unit generation module 101 is further used for expiring when default PH report cycle, and when described UE can be sent data at this moment by uplink authorization, generate and carry the MAC PDU of PH information and be sent to protocol Data Unit sending module 102;

Preferably, described protocol Data Unit generation module 101 is further used for when described remaining bits number during more than or equal to the length of the PH CE that is used for depositing described PH information, and described PH CE is located at after the valid data part or last MAC CE among the described MAC PDU.

Preferably, described protocol Data Unit generation module 101 is further used for when described remaining bits number during more than or equal to the length sum of described PH CE MAC PDU corresponding with it head, described MACPDU head is located at after last MAC PDU head among the described MAC PDU or last MACCE correspondence MAC PDU.

In sum, more than be preferred embodiment of the present invention only, be not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. the method for a reporting power margin PH information is characterized in that, this method comprises:
The bit number that remaining bits number in the FDDI sublayer protocol data cell (MACPDU) that subscriber equipment (UE) sends to the base station takies more than or equal to PH information, and when not comprising the PH information of this transmission correspondence among the described MAC PDU, described UE utilizes the remaining bits among the described MAC PDU, and described PH information is notified to described base station;
After having placed buffer status indication control unit (BSR CE) information and corresponding MAC PDU header of all valid data, filling among the MAC PDU that described remaining bits refers in preset length, the bit that is not filled.
2. method according to claim 1 is characterized in that, described method further comprises:
The path loss amplitude of variation that records as UE reaches default thresholding, and reports when forbidding that timer expiry and described UE can be sent data by uplink authorization, and described UE sends and carries the MAC PDU of PH information to the base station.
3. method according to claim 1 is characterized in that, described method further comprises: when default PH report cycle expires, and described UE be can be sent data by uplink authorization the time, and described UE sends and carries the MAC PDU of PH information to the base station.
4. according to the described arbitrary method of claim 1 to 3, it is characterized in that, when described remaining bits number during more than or equal to the length of the PH control unit (PH CE) that is used for depositing described PH information, described PH CE is located at after the valid data part or last the MAC CE among the described MAC PDU among the described MAC PDU.
5. method according to claim 4, it is characterized in that, when described remaining bits number during more than or equal to the length sum of described PH CE MAC PDU corresponding with it head, described MAC PDU head is located at after MAC PDU of last MAC CE correspondence among among the described MAC PDU last MAC PDU or the described MAC PDU.
6. the device of a reporting power margin information is characterized in that, this device comprises:
The protocol Data Unit generation module, be used for generating MAC PDU, export it to protocol Data Unit sending module, and the bit number that takies more than or equal to PH information of the remaining bits number in described MAC PDU, and when not comprising the PH information of this transmission correspondence among the described MAC PDU, described PH information is deposited among the described MAC PDU, after having placed buffer status indication control unit (BSR CE) information and corresponding MAC PDU header of all valid data, filling among the MAC PDU that described remaining bits refers in preset length, the bit that is not filled;
The protocol Data Unit sending module is used for and will sends to the base station from the MAC PDU of agreement data cell generation module.
7. device according to claim 6, it is characterized in that, described protocol Data Unit generation module is further used for reaching default thresholding when the path loss amplitude of variation that UE records, and report when forbidding that timer expiry and described UE can be sent data by uplink authorization, generate and carry the MAC PDU of PH information and be sent to the protocol Data Unit sending module.
8. device according to claim 6, it is characterized in that, described protocol Data Unit generation module is further used for expiring when default PH report cycle, and UE generates and carries the MAC PDU of PH information and be sent to the protocol Data Unit sending module can be sent data by uplink authorization the time.
9. according to the described arbitrary device of claim 6 to 8, it is characterized in that, described protocol Data Unit generation module is further used for when described remaining bits number during more than or equal to the length of the PH CE that is used for depositing described PH information, and described PH CE is located at after the valid data part or last MAC CE among the described MAC PDU.
10. device according to claim 9, it is characterized in that, described protocol Data Unit generation module is further used for when described remaining bits number during more than or equal to the length sum of described PH CE MAC PDU corresponding with it head, described MAC PDU head is located at after among the described MAC PDU last MAC PDU or last MAC CE correspondence MAC PDU.
CN 200810225501 2008-11-03 2008-11-03 Method and device for reporting power margin information CN101729108B (en)

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KR101852814B1 (en) 2010-06-18 2018-04-27 엘지전자 주식회사 Method of transmitting power headroom information at user equipment in wireless communication system and apparatus thereof
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CN102457351B (en) * 2010-10-29 2017-02-15 广州飞曙电子科技有限公司 Method and system for obtaining actual power headroom (PHR) of carrier of UE (user equipment)
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