CN101161003B - A method for reducing power consumption of mobile terminal - Google Patents

Abstract

The invention discloses a method for reducing power consumption of a mobile terminal, which comprises the following steps: setting any one multicast service mapping information element corresponding to one multicast service to indicate the frame position of the next multicast service mapping information element corresponding to the multicast service; the base station sends the multicast service mapping information element and the corresponding multicast service data to the mobile terminal; the mobile terminal acquires multicast service data according to the received multicast service mapping information element, and sets the length of the sleep time of the mobile terminal according to the frame position of the next multicast service mapping information element indicated by the multicast service mapping information element; and after the sleep time length, the mobile terminal receives and obtains the next multicast service mapping information element and the corresponding multicast service data. The invention makes the mobile terminal not need to receive the multicast service mapping message, thereby increasing the sleep time of the mobile terminal and reducing the power consumption of the mobile terminal.

Description

A method for reducing power consumption of mobile terminal

technical field

The invention relates to mobile communication technology, in particular to a method for reducing power consumption of mobile terminals in multicast and broadcast services.

Background of the invention

The multicast broadcast (MBS, Multicast and Broadcast Service) service provides a point-to-multipoint service specification in which a data source on the network side sends data to multiple mobile terminals in a mobile network, realizing network resource sharing and improving network resource utilization. utilization, especially the utilization of air interface resources. In addition, the MBS service can not only realize the multicast and broadcast of plain text low-rate messages, but also realize the multicast and broadcast of high-speed multimedia services, which conforms to the development trend of mobile data in the future, so it has broad development prospects.

In the MBS service, in order to reduce the power consumption of the mobile terminal, a sleep mode of the mobile terminal is proposed. The mobile terminal is in the sleep state during the pre-agreed sleep time length with the base station, the air interface temporarily interrupts the connection with the base station, neither sends nor receives any service information, but only listens during the pre-agreed listening time length with the base station state, receiving multicast service data normally. It can be seen that the sleep mode of the mobile terminal can reduce the transmission requests of the mobile terminal on the uplink and downlink, thereby reducing the power consumption of the mobile terminal.

In the MBS service, when the mobile terminal is in sleep mode, the mobile terminal can receive multicast service data in a non-macrodiversity manner. In the non-macrodiversity mode, in order to enable the mobile terminal to accurately receive the multicast service data, the base station will simultaneously deliver the multicast service mapping information element ( MBS_MAP_IE) downlink resource allocation (DL_MAP) message. Wherein, the format of the MBS_MAP_IE can be referred to in Table 1.

Syntax Size(bits) Notes MBS_MAP_IE{ -- -- Extended-2DIUC 4 Extended DIUC type Length 8 MBS_MAP_IE Length MBS Zone identifier 7 MBS area identifier, the identifier provided by the BS when the connection is initiated Macro diversity enhanced 1 Macrodiversity enhancement indication: 0 = non-macrodiversity area 1 = macrodiversity area If(Macro diversity enhanced＝1){

Syntax Size(bits) Notes Permutation 2 0b00=PUSC replacement method 0b01=FUSC replacement method 0b10=optional FUSC replacement method 0b11=adjacent subcarrier replacement method Idcell 6 Community ID OFDMA Symbol Offset 7 The OFDMA symbol offset between the start point of the MBS area and the start point of the frame. DIUC change indication 1 DIUC Change Instructions if(DIUC change indication=1){ -- -- Reserved 1 reserved bits Boosting 3 Power gain 000: no gain; 001: +6dB; 010: -6dB; 011: +9dB; 100: +3dB; 101: -3dB; 110: -9dB; 111: -12dB DIUC 3 -- No. Subchannels 4 The number of subchannels occupied by MBS_MAP messages. NO.OFDMA symbols 2 The number of OFDMA symbols occupied by the MBS_MAP message. Repetition Coding Indication 2 Code repetition indication: 0b00-no repetition 0b01-repeat 2 times 0b10-repeat 4 times 0b11-repeat 6 times

Syntax Size(bits) Notes } -- -- }else{ DIUC 4 -- CID 12 The lower 12 bits of the multicast connection number OFDMA Symbol Offset 8 The OFDMA symbol offset of the multicast service corresponding to the CID relative to the start of the frame. Subchannel offset 6 The subchannel offset of the multicast service corresponding to the CID relative to the start of the frame. Boosting 3 Power gain 000: no gain; 001: +6dB; 010: -6dB; 011: +9dB; 100: +3dB; 101: -3dB; 110: -9dB; 111: -12dB SLC_3_indication 1 sleep instructions NO.OFDMA Symbols 6 The number of OFDMA symbols occupied by the multicast service corresponding to the CID. NO.Subchannels 6 The number of subchannels occupied by the multicast service corresponding to the CID. Repetition Coding Indication 2 Code repetition indication: 0b00-no repetition 0b01-repeat 2 times 0b10-repeat 4 times 0b11-repeat 6 times if(SLC_3_indication=1){ -- --

Syntax Size(bits) Notes Next MBS frame offset 8 The frame offset of the next frame containing the MBS_MAP message relative to this frame. Next MBS OFDMA Symbol offset 8 The next MBS_MAP message phase OFDMA symbol offset for the start of its frame } -- -- } -- -- If! (byte boundary){ -- -- Padding Nibble Supplement to Byte boundary } }

Table 1

Referring to Table 1, when the mobile terminal adopts sleep mode and receives multicast service data through non-macrodiversity mode, the MBS_MAP_IE issued by the base station to the mobile terminal carries the parameters OFDMA Symbol Offset and Subchannel offset used to indicate specific multicast service resources . Among them, the parameter OFDMA Symbol Offset indicates the symbol offset position of the multicast service data in this data frame, the parameter Subchannel offset indicates the subchannel offset position of the multicast service data in this data frame, and the parameter NO.OFDMA Symbols indicates the number of symbols occupied by this multicast service, and the parameter NO.Subchannels indicates the number of subchannels occupied by this multicast service. In this way, according to the parameters OFDMA Symbol Offset, Subchannel offset, NO.OFDMA Symbols and NO.Subchannels, the mobile terminal can obtain the resources of this multicast service and accurately receive the data of this multicast service.

Referring to Table 1, when the mobile terminal adopts sleep mode and receives multicast service data through non-macrodiversity mode, the MBS_MAP_IE issued by the base station to the mobile terminal also carries the parameter SLC_3_indication=1, which is used to indicate that the mobile terminal adopts sleep mode and needs to Indicate the frame position of the subsequent multicast service mapping (MBS_MAP) message, and the parameters Next MBS frame offset and Next MBS OFDMA Symbol offset used to indicate the receiving position of the subsequent MBS_MAP message are correspondingly carried in the MBS_MAP_IE, where the parameter Next MBS frame offset is used To indicate the frame offset of the subsequent MBS_MAP message relative to this data frame, the parameter Next MBS OFDMA Symbol offset is used to indicate the symbol position of the subsequent MBS_MAP message, that is, the symbol offset of the subsequent MBS_MAP message relative to the frame header of the frame containing the MBS_MAP quantity. In this way, according to the parameters NextMBS frame offset and Next MBS OFDMA Symbol offset in the MBS_MAP_IE this time, the mobile terminal will actively wake up and listen to the MBS_MAP message in the subsequent process, and determine the next MBS_MAP message according to the relevant information carried in the MBS_MAP message. broadcast service resources in order to obtain the next multicast service data.

It can be seen from the above description that in the prior art, when the mobile terminal adopts sleep mode and receives multicast service data in a non-macrodiversity manner, the base station repeatedly indicates multicast service resources. This is because, in the MBS_MAP_IE issued by the base station this time, the definition of the parameter SLC_3_indication=1 indicates that the frame position of the next MBS_MAP message needs to be indicated, and the subsequent MBS_MAP is indicated by the parameters Next MBS frame offset and Next MBS OFDMA Symboloffset The receiving location of the message, and further indicate the next multicast service resource to the mobile terminal through the issued follow-up MBS_MAP message. Correspondingly, the mobile terminal must wake up to receive the follow-up MBS_MAP message in the follow-up process. message to obtain the next multicast service resource; however, in the next MBS_MAP_IE issued by the base station, the next multicast service resource will still be indicated through the parameters OFDMA Symbol Offset and Subchannel Offset. It can be seen that the base station has Instructions were repeated. For mobile terminals, not only need to wake up to obtain multicast service resources when receiving MBS_MAP_IE, but also must wake up and obtain multicast service resources again when receiving MBS_MAP messages, and the obtained multicast service resources are It is repeated again. Therefore, the sleep time of the mobile terminal is needlessly reduced, the power consumption of the mobile terminal is increased, and the degree of freedom of movement of the mobile terminal is reduced.

Contents of the invention

The main purpose of the present invention is to provide a method for reducing the power consumption of the mobile terminal, increase the sleep time of the mobile terminal, and reduce the power consumption of the mobile terminal.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A method for reducing power consumption of a mobile terminal, the method comprising the following steps:

A. Set a frame offset parameter in any multicast service mapping information element corresponding to a multicast service, and the frame offset parameter indicates that the next multicast service mapping information element corresponding to the multicast service is relative to the arbitrary frame offset of a multicast service mapping information element;

B. The base station carries the value of the frame offset parameter in the multicast service mapping information element and sends it to the mobile terminal;

C. The mobile terminal acquires multicast service data according to the received multicast service mapping information element, and obtains the value of the frame offset parameter in the received multicast service mapping information element, and corresponds to the value of the frame offset parameter The length of time is set to the length of its own sleep time;

D. The mobile terminal receives and obtains the next multicast service mapping information element and corresponding multicast service data after the length of sleep time has elapsed.

The multicast service mapping information element is carried in a downlink message and sent to the mobile terminal, wherein the downlink message is a downlink resource allocation message or a self-defined message;

In step D, the step of the mobile terminal receiving the next multicast service mapping information element includes: the mobile terminal receives the downlink message carrying the next multicast service mapping information element, and according to the indication information element carried in the downlink message The parameters of the type and the length of the information element obtain the next multicast service mapping information element from the downlink message.

When the downlink message is a downlink resource allocation message,

The step for the mobile terminal to obtain the next multicast service mapping information element includes: the mobile terminal parses the received downlink resource allocation message, and after analyzing the value of the downlink channel interval identification code corresponding to an information element is 15, And when the value of the extended downlink channel interval identification code corresponding to the information element is 0x00, the mobile terminal obtains the information element length parameter in the information element, and then uses the information element as the next multicast service mapping information element, and The next multicast service mapping IE is obtained according to the acquired IE length parameter.

The step A further includes: setting a symbol offset parameter and an information element length parameter in any multicast service mapping information element corresponding to a multicast service, wherein the symbol offset parameter indicates the next The symbol offset of a multicast service mapping information element relative to the frame header in the frame where it is located, and the information element length parameter indicates the actual length of the next multicast service mapping information element corresponding to the multicast service;

The step B further includes: the base station carries the value of the symbol offset parameter and the value of the information element length parameter in the multicast service mapping information element and sends it to the mobile terminal;

The step C further includes: the mobile terminal obtains the value of the symbol offset parameter and the value of the information element length parameter in the received multicast service mapping information element;

In step D, the step of the mobile terminal receiving the next multicast service mapping information element includes: the mobile terminal receives the next multicast service according to the value of the obtained symbol offset parameter and the value of the information element length parameter mapping information element.

The step C further includes: the mobile terminal acquires the value of the multicast service data length parameter in the received multicast service mapping information element, and then compares the time length corresponding to the obtained value of the information element length parameter with the indication The sum of the time lengths corresponding to the value of the multicast service data length parameter is set as the listening time length;

In step D, the mobile terminal receives the next multicast service mapping information element and multicast service data within the set listening time length.

The step A further includes: setting a parameter instructing the mobile terminal to acquire multicast service resources only according to the multicast service mapping information element in any one of the multicast service mapping information elements corresponding to a multicast service;

In step C, the step of the mobile terminal obtaining multicast service data according to the received multicast service mapping information element includes: the mobile terminal indicates that the mobile terminal only uses the multicast service mapping information element according to the received multicast service mapping information element. The mapping information element obtains the parameters of the multicast service resource, and parses out the symbol offset position, the subchannel offset position, the number of occupied OFDMA symbols and the number of the multicast service data from the received multicast service mapping information element. The number of occupied subchannels to obtain multicast service data.

The step of setting and instructing the mobile terminal to obtain the parameters of the multicast service resources only according to the multicast service mapping information element includes: redefining the parameter originally defined in the multicast service mapping information element as indicating the position of the subsequent multicast service mapping message frame In order to indicate the receiving position of the next multicast service mapping information element.

The step of setting and instructing the mobile terminal to obtain the parameters of the multicast service resource only according to the multicast service mapping information element includes: adding a self-defined parameter in the multicast service mapping information element, and defining the self-defined parameter as an indication The receiving location of the next multicast service mapping IE.

The step A further includes: deleting the parameters used to indicate the frame position and symbol position of the subsequent multicast service mapping message in any multicast service mapping information element corresponding to one kind of multicast service.

In step C, said setting its own sleep time length includes: the mobile terminal sets the length of a sleep window that does not need to receive data by itself;

In step D, the after the sleep duration includes: after the sleep window expires.

It can be seen that when the mobile terminal adopts sleep mode and receives multicast service data in a non-macrodiversity manner, the method proposed by the present invention has the following advantages:

1. In the present invention, by removing the parameters indicating subsequent MBS_MAP messages in the MBS_MAP_IE, and adding parameters indicating that only the next MBS_MAP_IE needs to obtain multicast service resources, and indicating the specific frame position of the next MBS_MAP_IE, the mobile The terminal does not need to receive subsequent MBS_MAP messages, but only obtains multicast service resources by receiving each MBS_MAP_IE, thereby increasing the sleep time of the mobile terminal and reducing the power consumption of the mobile terminal.

2. In the present invention, the MBS_MAP_IE indicates the length of the information element of the next MBS_MAP_IE and the symbol offset of the next MBS_MAP_IE relative to the frame header in the frame where it is located, which is beneficial for the mobile terminal to set its own listening time length , so that the mobile terminal does not need to receive the entire frame downlink message containing MBS_MAP_IE, but only receives the next MBS_MAP_IE in the downlink message, thereby further reducing the power consumption of the mobile terminal, simplifying the processing process of the mobile terminal, and reducing the processing time of the mobile terminal the complexity.

3. In the present invention, each parameter indicating the subsequent MBS_MAP message is removed in the MBS_MAP_IE, so that the base station does not need to send the MBS_MAP message to the mobile terminal, thus saving air interface resources and improving bandwidth efficiency.

Brief description of the drawings

FIG. 1 is a flow chart of reducing power consumption of a mobile terminal in Embodiment 1 of the present invention.

Fig. 2 is a flowchart of reducing power consumption of a mobile terminal in Embodiment 2 of the present invention.

Modes of Carrying Out the Invention

In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

When the mobile terminal adopts sleep mode and receives multicast service data through non-macro-diversity mode, since the base station will send the multicast service data and the DL_MAP message carrying MBS_MAP_IE to the mobile terminal at the same time, at the moment when the base station sends MBS_MAP_IE, in order To receive multicast service data, the mobile terminal must wake up to receive MBS_MAP_IE, which will not reduce the sleep time of the mobile terminal needlessly. However, in the prior art, the mobile terminal must wake up when the base station sends the MBS_MAP message in order to obtain multicast service resources, and the multicast service resources obtained through the MBS_MAP message can be obtained through the MBS_MAP_IE in the DL_MAP message. Obtain. It can be seen that for the mobile terminal, the MBS_MAP message is actually a redundant message. The mobile terminal only needs to obtain the MBS_MAP_IE issued by the base station each time, and can guarantee to obtain each specific multicast service resource, thereby normally receiving the base station The multicast service data delivered each time.

Aiming at this characteristic, the present invention proposes a method for reducing the power consumption of the mobile terminal, the core idea of which is: setting any MBS_MAP_IE corresponding to a multicast service indicates the frame position of the next MBS_MAP_IE corresponding to the multicast service ; Send the MBS_MAP_IE and the corresponding multicast service data to the mobile terminal; the mobile terminal obtains the multicast service data according to the received MBS_MAP_IE, and sets its own sleep time length according to the frame position of the next MBS_MAP_IE indicated by the received MBS_MAP_IE; The mobile terminal receives the next MBS_MAP_IE and multicast service data after the length of sleep time has elapsed.

Wherein, when realizing sending the MBS_MAP_IE to the mobile terminal, the present invention carries the MBS_MAP_IE in a downlink message and sends it to the mobile terminal. The downlink message may be an original DL_MAP message or a custom message of the present invention.

Moreover, in order to ensure that the mobile terminal can accurately receive the next MBS_MAP_IE after the length of sleep time, there are two specific implementation modes in the present invention: mode 1, setting in any one of the MBS_MAP_IEs to indicate that the next MBS_MAP_IE frame offset parameter, symbol offset parameter and information element length parameter, and carry the frame offset parameter value, symbol offset parameter value and information element length parameter value of the next MBS_MAP_IE in the MBS_MAP_IE sent to the mobile terminal , the mobile terminal only receives the next MBS_MAP_IE in the downlink message according to the value of the symbol offset parameter and the value of the information element length parameter of the next MBS_MAP_IE after the length of sleep time, instead of receiving the downlink message of the entire frame; mode 2 1. The mobile terminal receives the downlink message of the whole frame, and obtains the next MBS_MAP_IE from the downlink message by analyzing the downlink message.

In addition, it should be noted that, in the present invention, the involved MBS_MAP_IE and multicast service data refer to the multicast service corresponding to the same multicast connection identifier.

In the following, for the two implementation modes of the present invention to ensure that the mobile terminal receives the next MBS_MAP_IE after the length of sleep time, an embodiment is given respectively to illustrate the complete implementation process of the present invention.

Example 1:

FIG. 1 is a flow chart of reducing power consumption of a mobile terminal in Embodiment 1 of the present invention. Referring to Fig. 1, when the mobile terminal adopts sleep mode and receives multicast service data in a non-macrodiversity manner, the process of reducing the power consumption of the mobile terminal in the present invention specifically includes the following steps:

Step 101: In the MBS_MAP_IE, set a parameter instructing the mobile terminal to acquire multicast service resources only according to the MBS_MAP_IE.

Here, in the prior art, the parameter SLC_3_indication=1 is used to indicate that the mobile terminal adopts the sleep mode and needs to indicate the frame position of the subsequent MBS_MAP message, that is, the parameter SLC_3_indication=1 will instruct the mobile terminal to receive redundant information in the subsequent process. The rest of the MBS_MAP message, and obtain the multicast service resource again according to the MBS_MAP message. Therefore, in order to prevent the mobile terminal from receiving redundant MBS_MAP messages, in this step, in the MBS_MAP_IE, set the parameters indicating that the mobile terminal only obtains multicast service resources according to the MBS_MAP_IE, specifically implemented as:

Redefine the original parameter SLC_3_indication=1 in MBS_MAP_IE, and set the parameter SLC_3_indication=1, which is used to indicate that the mobile terminal adopts sleep mode and needs to indicate the receiving position of the next MBS_MAP_IE; or, directly delete the parameter SLC_3_indication, and add a custom parameter It is used to indicate that the mobile terminal adopts sleep mode and needs to indicate the receiving position of the next MBS_MAP_IE.

In this way, the base station does not need to send the MBS_MAP message to the mobile terminal by setting the parameter indicating that the mobile terminal obtains multicast service resources only according to the MBS_MAP_IE set in this step, but only carries the parameter indicating the next MBS_MAP_IE in the MBS_MAP_IE, and The mobile terminal can learn that there is no need to receive redundant MBS_MAP messages, and it only needs to receive the next MBS_MAP_IE.

Step 102: In the MBS_MAP_IE, delete the parameters Next MBS frame offset and Next MBS OFDMA Symboloffset used to indicate the specific receiving position of the MBS_MAP message.

Step 103: In the MBS_MAP_IE, set a frame offset parameter indicating the frame position of the next MBS_MAP_IE.

Here, by setting the frame offset parameter indicating the frame position of the next MBS_MAP_IE, the frame offset of the next MBS_MAP_IE relative to the MBS_MAP_IE of the current frame is indicated. For example, the frame offset parameter indicating the next MBS_MAP_IE can be set as NextMBS_MAP_IE frame offset.

Step 104: In the MBS_MAP_IE, set a symbol offset parameter indicating the next MBS_MAP_IE.

Here, by setting the symbol offset parameter indicating the next MBS_MAP_IE, the symbol offset of the next MBS_MAP_IE relative to the frame header of the next frame containing the MBS_MAP_IE is indicated. For example, the symbol offset parameter indicating the next MBS_MAP_IE may be set as Next MBS_MAP_IE OFDMA Symbol offset.

Step 105: In the MBS_MAP_IE, set the IE length parameter indicating the actual length of the next MBS_MAP_IE.

Here, the specific length of the next MBS_MAP_IE is indicated by setting the IE length parameter indicating the actual length of the next MBS_MAP_IE, so that the mobile terminal can set its own listening time length according to the specific frame length. For example, in this step, the IE frame length parameter can be set to Next MBS_MAP_IE Length.

Through steps 101 to 105, the present invention removes the parameters indicating the use of subsequent MBS_MAP messages in the MBS_MAP_IE, and adds parameters indicating the specific receiving location of the next MBS_MAP_IE and the length of the information element.

So far, a redefined MBS_MAP_IE is correspondingly obtained, and its specific format can be referred to in Table 2.

Syntax Size(bits) Notes MBS_MAP_IE{ -- -- Extended-2DIUC 4 Extended DIUC type Length 8 MBS_MAP_IE length MBS Zone identifier 7 MBS area identifier, the identifier provided by the BS when the connection is initiated Macro diversity enhanced 1 Macrodiversity enhancement indication: 0 = non-macrodiversity area 1 = macrodiversity area If(Macro diversity enhanced=1){ Permutation 2 0b00 = PUSC replacement method 0b01 = FUSC replacement method 0b10 = optional FUSC replacement method 0b11 = Adjacent subcarrier permutation method Idcell 6 Community ID OFDMA Symbol Offset 7 The OFDMA symbol offset between the start point of the MBS area and the start point of the frame. DIUC change indication 1 DIUC Change Instructions if(DIUC changeindication=1){ -- --

Syntax Size(bits) Notes Reserved 1 reserved bits Boosting 3 Power gain 000: no gain; 001: +6dB; 010: -6dB; 011: +9dB; 100: +3dB; 101: -3dB; 110: -9dB; 111: -12dB DIUC 3 -- No. Subchannels 4 The number of subchannels occupied by MBS_MAP messages. NO.OFDMA symbols 2 The number of OFDMA symbols occupied by the MBS_MAP message. Repetition Coding Indication 2 Code repetition indication: 0b00-no repetition 0b01-repeat 2 times 0b10-repeat 4 times 0b11-repeat 6 times } -- -- }else{ DIUC 4 -- CID 12 The lower 12 bits of the multicast connection number OFDMA Symbol Offset 8 The OFDMA symbol offset of the multicast service corresponding to the CID relative to the start of the frame. Subchannel offset 6 The subchannel offset of the multicast service corresponding to the CID relative to the start of the frame.

Syntax Size(bits) Notes Boosting 3 Power gain 000: no gain; 001: +6dB; 010: -6dB; 011: +9dB; 100: +3dB; 101: -3dB; 110: -9dB; 111: -12dB SLC_3_indication 1 sleep instructions NO.OFDMA Symbols 6 The number of OFDMA symbols occupied by the multicast service corresponding to the CID. NO.Subchannels 6 The number of subchannels occupied by the multicast service corresponding to the CID. Repetition CodingIndication 2 Code repetition indication: 0b00-no repetition 0b01-repeat 2 times 0b10-repeat 4 times 0b11-repeat 6 times if(SLC_3_indication=1){ Next MBS_MAP_IEframe offset 8 Indicates the number of offset frames of the next MBS_MAP_IE frame of the multicast service corresponding to this CID relative to this frame Next MBS_MAP_IEOFDMA Symbol offset 8 Indicates the number of OFDMA symbol offsets of the next MBS_MAP_IE of the multicast service corresponding to this CID relative to the frame header position of the frame where it is located Next MBS_MAP_IELength 8 Indicate the length of the next MBS_MAP_IE of the multicast service corresponding to this CID } }

Syntax Size(bits) Notes If! (byte boundary){ Padding Nibble } }

Table 2

Step 106: At the moment when the base station sends the multicast service data frame to the mobile terminal, the base station sends the downlink message carrying the MBS_MAP_IE and the multicast service data to the mobile terminal.

Here, the downlink message may be an existing DL_MAP message or a custom message of the present invention.

In addition, in this step, the base station carries in the MBS_MAP_IE the value of the frame offset parameter indicating the next MBS_MAP_IE, the value of the symbol offset parameter indicating the next MBS_MAP_IE, and the information element length parameter indicating the actual length of the next MBS_MAP_IE value.

Step 107: The mobile terminal obtains the MBS_MAP_IE from the downlink message, and according to the parameter in the MBS_MAP_IE that instructs the mobile terminal to obtain the multicast service resource only according to the MBS_MAP_IE, for example, the parameter SLC_3_indication=1, learns that the multicast service resource should be obtained according to the MBS_MAP_IE instead of the subsequent MBS_MAP message broadcast service resources, the specific multicast service data of this time is obtained according to the parameters OFDMA Symbol Offset, Subchannel offset, NO.OFDMA Symbols and NO.Subchannels in the MBS_MAP_IE.

Here, the mobile terminal obtains the symbol offset position of the multicast service data in the current frame data through the parameter OFDMA Symbol Offset, obtains the subchannel offset position of the multicast service data in the current frame through the parameter Subchannel offset, and obtains the subchannel offset position of the multicast service data in the current frame through the parameter NO.OFDMA Symbols obtains the number of OFDMA symbols occupied by the multicast service data, and obtains the number of subchannels occupied by the multicast service data through the parameter NO.Subchannels, so that the multicast service data can be accurately received.

Step 108: The mobile terminal sets its own sleep time according to the parameter in the received MBS_MAP_IE indicating that the mobile terminal obtains multicast service resources only according to the MBS_MAP_IE and the value indicating the next MBS_MAP_IE frame offset parameter.

Here, according to the parameter in the received MBS_MAP_IE indicating that the mobile terminal obtains the multicast service resource only according to the MBS_MAP_IE, for example, the parameter SLC_3_indication=1 shown in Table 2, the mobile terminal knows that it is not necessary to receive the MBS_MAP message in the subsequent process to obtain the multicast service resource again. That is to say, there is no need to listen to the MBS_MAP message at the frame time when the base station sends the MBS_MAP message, and can continue to be in the sleep state; and the mobile terminal indicates the next MBS_MAP_IE frame offset parameter according to the received MBS_MAP_IE Parameter value, such as the value of the parameter Next MBS_MAP_IE frame offset shown in Table 2, to obtain the frame offset of the next MBS_MAP_IE relative to this frame MBS_MAP_IE, and set its own according to the time length corresponding to the frame offset Length of sleep. For example, if the value of Next MBS_MAP_IE frame offset is 6, the mobile terminal can learn that the frame position of the next MBS_MAP_IE is 6 frames after the current frame MBS_MAP_IE, and the mobile terminal can set its own sleep time length to 6 frames , that is to ensure that it is in the sleep state within the time length of 6 frames, thereby reducing power consumption, and after the time length of 6 frames passes, that is, when the next MBS_MAP_IE arrives, it can be in the listening state and receive the next MBS_MAP_IE accurately.

Step 109: The mobile terminal acquires the symbol offset position of the next MBS_MAP_IE relative to the frame header in the frame where it is located according to the value of the parameter indicating the symbol offset of the next MBS_MAP_IE of the mobile terminal in the received MBS_MAP_IE.

Here, for example, the symbol offset of the symbol position of the next MBS_MAP_IE relative to the frame header containing the MBS_MAP_IE frame can be obtained through the parameter value of Next MBS_MAP_IE OFDMA Symboloffset shown in Table 2.

Step 110: The mobile terminal obtains the actual length of the next MBS_MAP_IE according to the value of the information element length parameter indicating the next MBS_MAP_IE in the received MBS_MAP_IE, and obtains the multicast service according to the value of the parameter indicating the data length of the multicast service in the MBS_MAP_IE The actual length of the data, and then set its own listening time length according to the acquired actual length of the next MBS_MAP_IE and the actual length of the multicast service data.

Here, for example, the parameter indicating the data length of the multicast service in the MBS_MAP_IE is the parameter NO.OFDMA Symbols shown in Table 2. In addition, according to the actual length of the next MBS_MAP_IE, it indicates the length occupied by the mobile terminal to receive the next MBS_MAP_IE in the subsequent process, that is to say, the mobile terminal can set its own listening time length according to the length of the next MBS_MAP_IE , without receiving the entire frame message containing MBS_MAP_IE.

Step 111: The mobile terminal is in a sleep state within the sleep time set by itself, and the air interface temporarily interrupts the connection with the base station, neither sending nor receiving any message.

Step 112: The mobile terminal receives the next MBS_MAP_IE and multicast service data sent by the base station after the set sleep time length passes, that is, within the listening time length set by itself.

Here, since the mobile terminal sets the time length corresponding to the frame offset of the next MBS_MAP_IE as the sleep time length, the mobile terminal happens to be the arrival of the downlink message carrying the next MBS_MAP_IE after the set sleep time length has elapsed. moment.

And, in this step, the process for the mobile terminal to receive the next MBS_MAP_IE is: according to the obtained symbol offset position of the next MBS_MAP_IE in the frame where it is located relative to the frame header, determine the specific symbol position for receiving the next MBS_MAP_IE , and then receive the next MBS_MAP_IE at the determined specific symbol position according to the obtained information element length of the next MBS_MAP_IE.

Example 2:

Fig. 2 is a flowchart of reducing power consumption of a mobile terminal in Embodiment 2 of the present invention. Referring to Fig. 2, when the mobile terminal adopts sleep mode and receives multicast service data in a non-macrodiversity manner, the process of reducing the power consumption of the mobile terminal in the present invention specifically includes the following steps:

All descriptions of steps 201 to 203 are the same as those of steps 101 to 103 .

Step 204: At the moment when the base station sends the multicast service data frame to the mobile terminal, the base station sends the downlink message carrying the MBS_MAP_IE and the multicast service data to the mobile terminal.

Here, the downlink message may be an existing DL_MAP message or a custom message of the present invention.

In addition, in this step 204, the difference between the MBS_MAP_IE carried in the downlink message and the MBS_MAP_IE carried in the downlink message in step 106 in Embodiment 1 is that: in step 106, the MBS_MAP_IE not only carries the frame offset indicating the next MBS_MAP_IE The value of the parameter also carries the value of the symbol offset parameter indicating the next MBS_MAP_IE and the value of the information element length parameter; in this step 204, the MBS_MAP_IE only carries the value of the frame offset parameter indicating the next MBS_MAP_IE.

All descriptions of steps 205 to 206 are the same as those of steps 107 to 108 .

All descriptions of step 207 and step 111 are the same.

Step 208: The mobile terminal receives the downlink message carrying the next MBS_MAP_IE and the multicast service data sent by the base station after the set sleep time length has elapsed.

Step 209: The mobile terminal obtains the next MBS_MAP_IE from the received downlink message, and obtains the multicast service data according to the next MBS_MAP_IE.

Here, the process for the mobile terminal to obtain the next MBS_MAP_IE from the downlink message is: the mobile terminal parses all the content in the received downlink message, and according to the information carried in the downlink message indicating the type and length of each information element parameters to obtain the next MBS_MAP_IE carried in the downlink message.

For example, the downlink message described in this embodiment is a DL_MAP message. Since the DL_MAP message contains multiple information elements, each information element is identified by a downlink channel interval identification code (DIUC), and when the DIUC is 15, Indicates that each current information element is an extended information element, MBS_MAP_IE is one of the extended information elements, and each extended information element is further indicated by an extended downlink channel interval identification code (Extended DIUC), and the Extended DIUC corresponding to MBS_MAP_IE is 0x00, "0x" here means hexadecimal. In this way, in this step, the process for the mobile terminal to obtain the next MBS_MAP_IE from the DL_MAP message is: the mobile terminal parses the received DL_MAP message, and when the DIUC corresponding to an information element is parsed to be 15, the mobile terminal then It is determined that the information element is an extended information element, and when the Extended DIUC corresponding to the extended information element is further analyzed to be 0x00, the mobile terminal determines that the extended information element is MBS_MAP_IE, and then according to the determined length of the indicated information element in the MBS_MAP_IE The parameter Length is used to obtain the length of the MBS_MAP_IE, so as to obtain the next MBS_MAP_IE.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A method for reducing mobile terminal power consumption, characterized in that the method comprises the following steps: A. Set a frame offset parameter in any multicast service mapping information element corresponding to a multicast service, and the frame offset parameter indicates that the next multicast service mapping information element corresponding to the multicast service is relative to the arbitrary frame offset of a multicast service mapping information element; B. The base station carries the value of the frame offset parameter in the multicast service mapping information element and sends it to the mobile terminal; C. The mobile terminal acquires multicast service data according to the received multicast service mapping information element, and obtains the value of the frame offset parameter in the received multicast service mapping information element, and corresponds to the value of the frame offset parameter The length of time is set to the length of its own sleep time; D. The mobile terminal receives and obtains the next multicast service mapping information element and corresponding multicast service data after the length of sleep time has elapsed. 2. The method according to claim 1, wherein the multicast service mapping information element is carried in a downlink message and sent to the mobile terminal, wherein the downlink message is a downlink resource allocation message or a user-defined information; In step D, the step of the mobile terminal receiving the next multicast service mapping information element includes: the mobile terminal receives the downlink message carrying the next multicast service mapping information element, and according to the indication information element carried in the downlink message The parameters of the type and the length of the information element obtain the next multicast service mapping information element from the downlink message. 3. The method according to claim 2, wherein when the downlink message is a downlink resource allocation message, The step for the mobile terminal to obtain the next multicast service mapping information element includes: the mobile terminal parses the received downlink resource allocation message, and after analyzing the value of the downlink channel interval identification code corresponding to an information element is 15, And when the value of the extended downlink channel interval identification code corresponding to the information element is 0x00, the mobile terminal obtains the information element length parameter in the information element, and then uses the information element as the next multicast service mapping information element, and The next multicast service mapping IE is obtained according to the acquired IE length parameter. 4. The method according to claim 1, wherein said step A further comprises: setting a symbol offset parameter and an information element length parameter in any multicast service mapping information element corresponding to a multicast service, Among them, the symbol offset parameter indicates the symbol offset of the next multicast service mapping information element corresponding to the multicast service relative to the frame header in the frame where it is located, and the information element length parameter indicates the next multicast service mapping information element corresponding to the multicast service. The actual length of a multicast service mapping information element; The step B further includes: the base station carries the value of the symbol offset parameter and the value of the information element length parameter in the multicast service mapping information element and sends it to the mobile terminal; The step C further includes: the mobile terminal obtains the value of the symbol offset parameter and the value of the information element length parameter in the received multicast service mapping information element; In step D, the step of the mobile terminal receiving the next multicast service mapping information element includes: the mobile terminal receives the next multicast service according to the value of the obtained symbol offset parameter and the value of the information element length parameter mapping information element. 5. The method according to claim 4, wherein the step C further comprises: the mobile terminal acquires the value indicating the multicast service data length parameter in the received multicast service mapping information element, and then converts the acquired The sum of the time length corresponding to the value of the information element length parameter and the time length corresponding to the value of the indicated multicast service data length parameter is set as the listening time length; In step D, the mobile terminal receives the next multicast service mapping information element and multicast service data within the set listening time length. 6. The method according to any one of claims 1 to 5, wherein the step A further comprises: setting in any multicast service mapping information element corresponding to a multicast service to indicate that the mobile terminal only Acquiring parameters of multicast service resources according to the multicast service mapping information element; In step C, the step of the mobile terminal obtaining multicast service data according to the received multicast service mapping information element includes: the mobile terminal indicates that the mobile terminal only uses the multicast service mapping information element according to the received multicast service mapping information element. The mapping information element obtains the parameters of the multicast service resource, and parses out the symbol offset position, the subchannel offset position, the number of occupied OFDMA symbols and the number of the multicast service data from the received multicast service mapping information element. The number of occupied subchannels to obtain multicast service data. 7. The method according to claim 6, characterized in that, the step of setting and instructing the mobile terminal to obtain the parameters of the multicast service resource only according to the multicast service mapping information element comprises: originally defining the multicast service mapping information element as The parameter that needs to indicate the position of the subsequent multicast service mapping message frame is redefined as needing to indicate the receiving position of the next multicast service mapping information element. 8. The method according to claim 6, wherein the step of setting the parameter indicating that the mobile terminal obtains the multicast service resource only according to the multicast service mapping information element comprises: adding a A user-defined parameter, which is defined as indicating the receiving position of the next multicast service mapping information element. 9. The method according to claim 1, wherein the step A further comprises: in any multicast service mapping information element corresponding to a multicast service, deleting the message used to indicate the subsequent multicast service mapping Parameters for frame position and symbol position. 10. The method according to claim 1, characterized in that, in step C, said setting the sleep time length of itself comprises: the mobile terminal sets the length limit of the sleep window which does not need to receive data by itself; In step D, the after the sleep duration includes: after the sleep window expires.

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