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Buffer area state reporting method and device, and data quantity setting method

A technology of buffer status and data volume, applied in the field of communication, can solve the problems of bandwidth resource occupation and waste, achieve accurate authorization and avoid waste

Inactive Publication Date: 2009-09-23
钟涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] like figure 2 As shown, the above-mentioned BSR calculation method has the following problem, that is, the BSR is reported after the SDU arrival time. If the BSR is sent at point A, the base station sends an uplink authorization after receiving the BSR, and the terminal receives the uplink transmission authorization at a. The SDU has not reached the timeout point, so it is reasonable for the terminal to use the authorization to send data; however, if the BSR is sent at point B, the terminal receives the uplink authorization at point B, because the SDU has timed out, the SDU has been discarded, and the terminal receives the authorization After that, there may be no data to send, so the uplink grant is wasted, occupying the uplink bandwidth resource of the cell

Method used

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  • Buffer area state reporting method and device, and data quantity setting method
  • Buffer area state reporting method and device, and data quantity setting method
  • Buffer area state reporting method and device, and data quantity setting method

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Embodiment 1

[0036] According to an embodiment of the present invention, a buffer status report method is provided, which is used for the terminal to report the buffer status to the base station. The data volume in the buffer status report does not include the data that the discard timer is about to expire, specifically, including PDCP SDUs before the PDCP layer performs header compression, or PDCP PDUs after performing PDCP header compression but not yet delivered to the RLC layer, or RLC SDUs that have been delivered to the RLC layer but have not been assigned an RLC sequence number.

[0037] like image 3 As shown, the buffer state reporting method according to the embodiment of the present invention includes the following processing:

[0038] Step S302, determining a first data unit set, wherein the first data unit set includes data that can be sent by the Packet Data Convergence Protocol (PDCP) layer and the Radio Link Control (RLC) layer;

[0039] Step S304, determining a second dat...

example

[0048] According to the above determination method, the remaining time T is discarded 1 =T d -T 2 (T d is the discard timer duration, T 2 is the time elapsed from the start of the discard timer to the triggering of the buffer status report), and the time from sending the BSR to receiving the uplink grant is the feedback time T b , and send a BSR at point K that triggers a buffer status report, if T b 1 , it can ensure that the SDU is discarded after receiving the authorization, and the authorization will not be wasted. That is, if Figure 4 As shown, if the uplink authorization is received at point k when the discard timer expires, then point K is the critical point for SDU calculation to BSR, and the BSR carrying the SDU before point K is valid. , the SDU may be discarded before the uplink grant is received, thus wasting the uplink scheduling grant.

[0049] As mentioned above, with the help of the technical solution provided by the present invention, the base station ...

Embodiment 2

[0051] According to an embodiment of the present invention, a method for setting a buffer status report data volume is provided, which is used for setting the data volume in a buffer status report from a terminal to a base station.

[0052] like Figure 5 As shown, the buffer status report data volume setting method according to the embodiment of the present invention includes the following processing:

[0053] Step S502, determining a first data unit set, wherein the first data unit set includes data that can be sent by the packet data convergence protocol layer and the radio link control layer;

[0054] Step S504, determining a second data unit set, wherein the second data unit set includes data that is about to be discarded when the service data unit discard timer expires;

[0055] Step S506: Subtract the sum of the data volumes of the protocol data units in the first data unit set from the sum of the data volumes of the protocol data units in the second unit set, and use ...

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Abstract

The invention discloses a buffer area state reporting method and a system, and a buffer area state reporting data quantity setting method. In the buffer area state reporting method, under the situation of meeting predetermined conditions, triggering a buffer area state report, and carrying the total data quantity determined by the following modes in a buffer area state report: determining a first data unit set; determining a second data unit set; and subtracting a data quantity sum of a protocol data unit in the second data unit set from a data quantity sum of a protocol data unit in the first data unit set, and using the subtraction result as the total data quantity, wherein the first data unit set comprises data capable of being sent by a packet data convergence protocol layer and a wireless link control layer; and the second data unit set comprises data discarded when a service data unit discarding timer is about overtime. The method can avoid waste of uplink bandwidth resources of a cell to a certain extent, and make uplink authorization assignment more accurate and reasonable.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a buffer status report method and device in a Long Term Evolution system (LTE for short), and a buffer status report data volume setting method. Background technique [0002] figure 1 A schematic diagram showing the structure of a cellular wireless communication system, such as figure 1 As shown, the cellular wireless communication system is mainly composed of a terminal, a base station, and a core network (Core Network, CN for short). A network composed of base stations is called a radio access network (Radio Access Network, RAN for short), and is responsible for access layer affairs, such as management of radio resources. Between base stations (for example, figure 1 The base station 1, the base station 2 and the base station 3) may be physically or logically connected according to actual conditions. Each base station can be connected to one or more core network nodes. ...

Claims

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Application Information

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IPC IPC(8): H04W80/08H04L29/06
Inventor 阮象华张健陈艳丽
Owner 钟涛
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